Fan low-level tilt setting air conditioner main machine equipment platform

Abstract

The present application belongs to the technical field of high-efficiency energy-saving building, and discloses a fan low-position inclined setting air conditioner main machine equipment platform. The fan low-position inclined setting air conditioner main machine is arranged in the outer corridor type equipment platform, and the air outlet of the air exhaust cavity of the air conditioner main machine faces the outer facade of the outer corridor type equipment platform. The air outlet of the air conditioner main machine is provided with an air exhaust section for guiding the air flow. A plurality of guide plates are arranged in the air exhaust section of the air conditioner main machine. The guide plates are parallel to or close to parallel to the louver blades of the outer corridor type equipment platform outside the air conditioner main machine, and the air exhaust section is arranged adjacent to the louver of the outer facade of the outer corridor type equipment platform. The equipment platform eliminates the obstruction of the louver blades to the air exhaust of the main machine fusion body outer heat exchanger, effectively penetrates the air flow path of the outer heat exchanger, guarantees the thermal performance of the main machine, maintains the decorative nature of the outer facade of the louver, realizes the perfect unity of the decorative nature of the outer facade of the equipment platform, the visual effect of the outer facade of the building and the excellent thermal performance of the air conditioner main machine.

Description

Technical Field

[0001] This invention belongs to the field of high-efficiency and energy-saving building technology, and more specifically, relates to an air conditioning main unit equipment platform with a fan tilted at a low position. Background Technology

[0002] Air conditioning is the most important energy-consuming device in a building and a key focus of building energy conservation. For example... Figure 1 As shown, the external heat exchanger modules of current commercial air conditioning units have evolved from "shell-and-tube heat exchangers + cooling towers" to air surface coolers. "Finned tube heat exchangers + top-discharge axial fans" have become the standard configuration for commercial air conditioning unit external heat exchanger modules. Multi-split systems and air-cooled water chiller modules, based on the "finned tube heat exchanger + top-discharge axial fan" model, have eliminated dependence on cooling towers and water sources, improving the environmental adaptability and cooling efficiency of the air conditioning units. However, the relationship between air conditioning units and buildings is undergoing another significant change: air conditioning units are moving away from building rooftops to give way to functions such as photovoltaic power generation, and the concept of building distributed energy systems is driving air conditioning units to enter multi-story equipment platforms within buildings.

[0003] However, as Figure 2-3 As shown, the current multi-split air conditioning units, air-cooled water chiller modules, and other "top-discharge" air conditioning units, as well as the structural relationship between the units and the building, are still "two separate entities." The air conditioning units are still the same units, and the equipment platform is still a traditional external corridor-style structural space. Only the spatial displacement of the air conditioning units has been implemented. Neither has adapted to the structural relationship requirements of the building's distributed energy system, resulting in a series of problems such as obstructed airflow in the air conditioning units, reduced energy efficiency of the cooling system, large footprint of the air intake and distribution channels, unreasonable use of equipment platform space, increased footprint of the units, and reduced power density.

[0004] The ratio of cooling capacity to floor area of ​​air conditioning main unit rooms in high-rise buildings in the Yangtze River and Yellow River basins, i.e., the cooling power density of air conditioning main unit rooms, has an average value of approximately 1.16 Mw / 100㎡, or 11.6 kW / ㎡. If the cooling load per unit area of ​​the building is 100 W / ㎡, then the cooling capacity of each 1㎡ main unit room can meet the cooling needs of 116.3㎡ of building area. The floor area of ​​the main unit room accounts for 0.85% of the total building area, which is consistent with the 0.8% recommended in the "Code for Design of Building Heating, Ventilation and Air Conditioning".

[0005] like Figure 4As shown, the cooling load per unit area in the HVAC design of high-rise and super high-rise buildings is getting larger and larger. In the Yangtze River Basin, it even exceeds 200W / ㎡. Due to the increase in building heat load and the decentralized and localized air conditioning units under the concept of distributed air conditioning systems, the idle air conditioning resources within the building cannot be used across areas and floors. If the cooling power density of the main unit room is still maintained at a low level of 11.6kw / ㎡, then the cooling capacity of each 1㎡ air conditioning main unit room can only meet the cooling needs of 58㎡ of building area. The area of ​​the air conditioning main unit room in the total building area rises to 1.7%, which greatly exceeds the requirements of the current building HVAC design code.

[0006] The structural problems of current air conditioning units and building distributed energy systems can be summarized into two main points:

[0007] First, the energy density of the air conditioning unit platform is low. After multiple structural optimizations and energy efficiency improvements, the power density of the current air conditioning unit, calculated based on its floor area, has exceeded 40 kW / ㎡. However, the power density of the current air conditioning unit platform is only 10 kW / ㎡. This means that the floor area occupied by the air conditioning unit's air inlet and outlet ducts, maintenance passages, and ventilation blind spots on the platform is three times the floor area of ​​the air conditioning unit itself. The current air conditioning unit platform occupies too much floor area, generally exceeding 1.5% of the total building area, which has become a prominent problem in building HVAC design.

[0008] Secondly, there is the problem of excessive horizontal width occupied by equipment platforms on the building facade. Currently, the air intake and exhaust structures of air conditioning units and equipment platforms are unreasonable, and the utilization rate of depth and top space is low, resulting in excessive horizontal width occupation of the building facade by equipment platforms. In existing high-rise buildings, equipment floors are set approximately every 12 floors, with the surrounding corridors entirely occupied by the air conditioning unit's intake and exhaust vents. The width of the building facade is a crucial resource second only to the building area in the building's performance indicators. In high-rise and super high-rise buildings, the competition for facade width by air conditioning unit equipment platforms, resulting in excessive horizontal width occupation, obstructs visual communication between the interior space and the external environment on the same floor, and has become a prominent issue in building HVAC design. Summary of the Invention

[0009] To address the aforementioned technical problems, this invention provides a low-profile, tilted air conditioning unit platform. This invention solves the problems through structural innovations in the external heat exchanger module of the central air conditioning unit and the spatial relationship between the central air conditioning unit and the building.

[0010] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0011] An air conditioning unit platform with a low-profile, inclined fan is disclosed. The air conditioning unit is installed within an outer corridor-type platform, with its exhaust outlet facing the outer facade of the platform. An exhaust section for guiding the airflow is provided at the air outlet of the air conditioning unit. Several guide plates are installed within the exhaust section of the air conditioning unit; these guide plates are arranged parallel to or nearly parallel to the louvers of the outer corridor-type platform outside the air conditioning unit.

[0012] Furthermore, the exhaust section is provided with louvers on the exterior facade of the outer corridor-type equipment platform.

[0013] Furthermore, the exterior louvers of the external corridor-type equipment platform are provided with opening structures that match the exhaust section; the exhaust section is embedded in the louver opening structure.

[0014] Furthermore, the opening structure is rectangular, with its long side parallel to the bottom or side of the outer corridor-type equipment platform.

[0015] Furthermore, the air conditioning unit with the fan tilted at a low position includes a housing, an external heat exchanger, a fan, and a compressor;

[0016] The external heat exchanger is located at the upper part of the shell; the fan is connected to the negative pressure chamber of the external heat exchanger and is located below the negative pressure chamber of the external heat exchanger; the lower part of the shell is provided with a fan outlet.

[0017] Furthermore, the air conditioning unit with the fan tilted at a low position includes a housing and at least two sets of refrigerant circulation systems disposed within the housing. The refrigerant circulation system includes an external heat exchanger and a compressor. All refrigerant circulation systems share a single external heat exchanger and a negative pressure chamber for the external heat exchanger.

[0018] Furthermore, the upper part of the housing is provided with an air inlet adapted to the external heat exchanger; the air inlet is located on the front, side and / or back of the housing.

[0019] Furthermore, the negative pressure chamber of the external heat exchanger is composed of an external heat exchanger, a part of the shell, and a base plate; the external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger; the base plate can be horizontally arranged, inclined, or vertically arranged.

[0020] The base plate is provided with several exhaust ports for the negative pressure chambers of the external heat exchanger, and each exhaust port is equipped with an axial flow fan.

[0021] Furthermore, the base plate is inclined, with the angle θ between the base plate and the vertical direction being 0 to 90°; the angle λ between the motor shaft of the fan and the vertical direction is 0 to 90°.

[0022] Furthermore, a compressor chamber for housing a refrigerant circuit assembly including a compressor is provided in the ventilation blind area below the negative pressure chamber of the external heat exchanger, the bottom plate, or the exhaust chamber in the housing; an electrical box is provided in the ventilation blind area inside the negative pressure chamber of the external heat exchanger.

[0023] Furthermore, the external heat exchanger is a horizontal cross-section C-type finned tube external heat exchanger, a horizontal cross-section L-type finned tube external heat exchanger, a flat plate finned tube external heat exchanger, a horizontal cross-section V-type finned tube heat exchanger assembly, or a sawtooth-shaped zigzag finned tube heat exchanger assembly.

[0024] Furthermore, an intermediate heat exchanger is also provided, wherein the two heat exchange medium channels of the intermediate heat exchanger are the refrigerant channel of the air conditioning unit and the air conditioning water channel, respectively; the refrigerant channel is connected to the refrigerant circuit of the air conditioning unit; and the air conditioning water channel is connected to the indoor heat exchanger of the air conditioning unit.

[0025] Furthermore, the fan is an axial flow fan or a centrifugal fan. The centrifugal fan is a backward-curved external rotor centrifugal fan.

[0026] Furthermore, the base plate is horizontally arranged, and the fan is located at the bottom of the negative pressure chamber of the external heat exchanger; the exhaust port of the fan faces vertically downward; the exhaust port has an exhaust cavity that connects to the air outlet of the shell.

[0027] Furthermore, the base plate is inclined, and the angle θ between the base plate and the vertical direction is 30-60°; the angle λ between the motor shaft of the fan and the vertical direction is 30-60°; preferably, the angle λ between the motor shaft of the fan and the vertical direction is 45°.

[0028] The base plate and the fan are housed inside the casing.

[0029] Furthermore, the base plate is a vertically arranged air outlet on the shell, the exhaust port and the air outlet are combined, and the air outlet is equipped with a fan; the exhaust port of the fan is arranged horizontally; and a connecting part is provided between the base plate and the external heat exchanger.

[0030] Furthermore, an electrical box is installed inside the negative pressure chamber of the external heat exchanger.

[0031] Furthermore, the horizontal cross-section V-shaped finned tube heat exchanger assembly comprises at least two flat plate finned tube heat exchangers; or it consists of a V-shaped finned tube heat exchanger formed by bending flat plate finned tube heat exchangers; or it consists of a flat plate finned tube heat exchanger and the V-shaped finned tube heat exchanger formed by bending flat plate finned tube heat exchangers; the cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly perpendicular to the long side of the fins is a broken line type.

[0032] Furthermore, the sawtooth-shaped zigzag finned tube heat exchanger assembly is composed of one or both of a number of flat plate finned tube heat exchangers or V-shaped finned tube heat exchangers, combined with a number of baffles; the sawtooth-shaped zigzag finned tube heat exchanger assembly has a sawtooth-shaped zigzag shape on the cross section perpendicular to the long side of the fins.

[0033] Furthermore, the negative pressure chamber and exhaust chamber of the external heat exchanger are provided with a compressor chamber for placing the fluorine circuit assembly including the compressor and electrical box; that is, the compressor chamber is side-mounted.

[0034] Furthermore, an exhaust section for guiding gas flow is provided at the air outlet.

[0035] Furthermore, the exhaust section is provided with several guide vanes; the guide vanes are arranged parallel to or nearly parallel to the louvers outside the air conditioning unit, or the guide vanes are arranged vertically and have an angle to guide the exhaust airflow away from the air conditioning unit.

[0036] Furthermore, the intermediate heat exchanger is selected from plate heat exchangers, shell-and-tube heat exchangers, coaxial heat exchangers, or combinations thereof.

[0037] Furthermore, the finned tube heat exchanger includes finned plates and heat exchange tubes; several finned plates that are parallel to each other and spaced at a certain distance form a fin group; heat exchange tubes are inserted in a direction perpendicular to the finned plates; at least two groups of heat exchange tubes inserted in the finned plates are arranged in parallel side by side along the short side of the finned plates; the heat exchange tubes in the heat exchange tube groups are arranged in the long side of the finned plates; the parallel heat exchange tube groups are connected to compressors of different refrigerant circulation systems; fins between each heat exchange tube group form fin thermal bridges in the horizontal and vertical directions.

[0038] Furthermore, heat exchanger tube groups in the same row and / or interconnected staggered heat exchanger tube groups are connected in parallel to the refrigerant piping of the same refrigeration system.

[0039] At least two sets of heat exchange tubes are installed in the finned plate, and at least one set of heat exchange tubes is an air source water heater heat exchange tube set.

[0040] Furthermore, the finned plate includes at least two sets of heat exchange tubes for the air conditioning system, with the air source water heater heat exchange tubes located between adjacent heat exchange tubes for the air conditioning system.

[0041] Furthermore, the external heat exchanger is a horizontal cross-section C-shaped finned tube external heat exchanger composed of three of the aforementioned finned tube heat exchangers.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The advantages of this embodiment, which includes a low-positioned air conditioning unit with a fan, are:

[0044] 1. Innovative airflow structure promotes deep integration of the air conditioning unit and the exterior facade of the equipment platform.

[0045] Because of the modernization and fashion of architecture, the pursuit of visual effects for building facades by architects and owners, the whole society's love for "architecture as frozen music," and the function of louvers in sheltering from wind and rain and preventing wind, frost, snow and ice from corroding equipment platforms and air conditioning units, the installation method of using louvers to hide air conditioning units on equipment platforms will become widespread and solidified. The problems of the classic "rear inlet, front exhaust" airflow path of air conditioning unit external heat exchangers, such as the obstruction and suppression of airflow to the external atmosphere by louvers, increased exhaust static pressure and reduced airflow, and serious degradation of the heat exchange performance of external heat exchangers, will become unavoidable.

[0046] In this embodiment, the air conditioning unit of the equipment platform is equipped with a low-positioned fan and air outlet, which creates conditions for the low-resistance exhaust of the external heat exchanger of the unit through the louvers on the exterior facade of the equipment platform: a downward-sloping exhaust section is set up between the air outlet and the louvers on the exterior facade of the equipment platform, forming a low-resistance downward-sloping exhaust of the external heat exchanger to the ambient atmosphere. The direction of the exhaust airflow is parallel to or nearly parallel to the gap between the louver blades. This not only eliminates the obstruction of the exhaust of the unit and the external heat exchanger by the traditional louver slats, effectively connects the air path of the external heat exchanger, and ensures the thermal performance of the unit, but also maintains the decorative appearance of the louver facade. This achieves a perfect unity between the decorative appearance of the equipment platform facade, the visual effect of the building facade, and the excellent thermal performance of the air conditioning unit.

[0047] 2. High energy efficiency ratio and economical and practical

[0048] In this embodiment, the external heat exchanger of the air conditioning unit is installed with the fan positioned low, and it adopts a C-shaped finned tube heat exchanger with a large ventilation surface area. The fins that expand secondary on the ventilation surface have an even larger heat exchange area. In this embodiment, the airflow cross-sectional area of ​​the negative pressure chamber before the fan intake of the air conditioning unit is large, resulting in low wind speed and low friction resistance. Furthermore, the fan in this embodiment can be an axial flow fan, which has low static pressure and a large exhaust volume.

[0049] This embodiment, by configuring an external heat exchanger with a large heat exchange area and a negative pressure chamber of the external heat exchanger with a large flow area and low resistance, ensures the load capacity of the air conditioning unit, controls the energy consumption of the air duct, and improves the energy efficiency ratio and economic practicality of the air conditioning unit. Attached Figure Description

[0050] Figure 1 A 3D view of the current multi-split air conditioning unit;

[0051] Figure 2 An external corridor-type equipment platform for installing multi-split air supply unit modules on the existing structure;

[0052] Figure 3The existing air outlet distribution on the exterior facade of the corridor-type equipment platform is designed to accommodate multi-split air conditioning modules.

[0053] Figure 4 The dry-hung glass facade of the super high-rise building has a horizontal strip opening in the middle that serves as the air inlet and outlet for the multi-split air conditioning system.

[0054] Figure 5 A three-dimensional view of the air conditioning unit with the rear fan of the external heat exchanger positioned low in Example 1;

[0055] Figure 6 This is a vertical sectional view of the air conditioning unit with the rear fan of the external heat exchanger at a low position, as shown in Example 1.

[0056] Figure 7 This is a vertical sectional view of the air conditioning unit with the rear fan of the external heat exchanger at a low position, as shown in Example 1.

[0057] Figure 8 This is a horizontal sectional view of the air conditioning unit with the rear fan of the external heat exchanger at a low position, as shown in Example 1.

[0058] Figure 9 This is a vertical sectional view of the air conditioning unit platform structure with the fan positioned low in Example 1.

[0059] Figure 10 This is a vertical sectional view of the air duct operation of the air conditioning unit platform with the fan positioned low in Example 1.

[0060] Figure 11 This is a vertical sectional view of the equipment platform structure with the air conditioning unit exhaust section embedded with louvers at a low position for the fan, as shown in Example 1.

[0061] Figure 12 This is a vertical sectional view of the air duct operation of the air conditioning unit platform with the fan positioned low in Example 1.

[0062] Figure 13 This is a schematic diagram of the transverse and longitudinal thermal bridges of the fins in the multi-branch dual-system flat plate finned tube heat exchanger in Example 2. It shows a partial section of the "two-in-one" external heat exchanger module of the fluorine circuit finned copper tube, which establishes a thermal connection between the evaporator of the middle layer air source water heater and the finned tube external heat exchanger of the inner and outer layers air conditioning units through the transverse thermal bridges of the fins.

[0063] Figure 14 This is a three-dimensional view of an external heat exchanger module with transverse thermal bridges connecting the finned tubes, consisting of a single row in the middle and double rows on the inner and outer sides of the middle row, which belong to the air source water heater unit and the air conditioner unit, respectively, in Example 2.

[0064] Figure 15 This is a schematic diagram of the horizontal structure of the external heat exchanger module of Example 2, which consists of a single row in the middle and double rows of finned tubes on the inner and outer sides, respectively belonging to the air source water heater main unit and the air conditioner main unit.

[0065] Figure 16 This is a schematic diagram of the combined air conditioning unit and air source water heater unit system of Example 2, which uses a transverse finned thermal bridge to implement complementary airflow merging of external heat exchanger structure.

[0066] Figure 17 This is a schematic diagram of the pressure-enthalpy diagram for Example 2, showing how the merging of the complementary airflow structure increases the evaporation pressure of the water heater evaporator, leading to increased heat absorption per unit mass of refrigerant, reduced compression work, and increased COP (the increased evaporation pressure further increases the refrigerant circulation volume and heating power).

[0067] Figure 18 This is a schematic diagram of an air conditioning system in Example 3, which uses an intermediate heat exchanger to output air conditioning water to the indoor unit. Detailed Implementation

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] The front of the shell is the side of the shell facing the building facade; the back is the side of the shell facing away from the building facade.

[0073] Example 1

[0074] like Figure 5-12 As shown, this embodiment is an equipment platform with a fan installed at a low position. The air conditioning unit with the fan installed at a low position is located inside the outer corridor equipment platform 5, and the air outlet 331 of the exhaust cavity 33 faces the outer facade of the outer corridor equipment platform.

[0075] A swooping exhaust section 35 for guiding gas flow is installed at the air outlet 331; the swooping exhaust section 35 is provided with several guide plates 34 that are parallel or substantially parallel to the louvered window slats 52 on the exterior facade of the outer corridor equipment platform.

[0076] During installation in this embodiment, the air conditioning unit with a low-positioned fan installed on the swooping exhaust section 35 is placed close to the louvers without touching them, and the air outlet of the swooping exhaust section is placed on the ground adjacent to the louvers.

[0077] like Figure 5-12 As shown, in this embodiment, the air conditioning unit with the rear fan of the external heat exchanger is inclined at a low position and adopts a two-section cavity structure, namely the upper part of the shell and the lower part of the shell. The two-section cavity is vertically connected to form the negative pressure cavity 124 of the external heat exchanger of the air conditioning unit, the exhaust cavity 33 and the internal air passage.

[0078] The air conditioning unit with the fan tilted at a low position includes a housing 1, an external heat exchanger 2, a fan 38, a compressor 121, and a gas-liquid separator 126; the external heat exchanger 2 is located on the upper part of the housing 1; the fan 38 is connected to the negative pressure chamber 124 of the external heat exchanger and is located below the negative pressure chamber 124 of the external heat exchanger; the lower part of the housing 1 is provided with an air outlet 331 for the fan 38; the air outlet 331 is located on the front of the housing 1.

[0079] The upper part of the housing 1 is provided with an air inlet 125 adapted to the external heat exchanger 2; the air inlet 125 is located on the back and side of the housing 1.

[0080] The negative pressure chamber 124 of the external heat exchanger is composed of an external heat exchanger 2, a portion of the shell 1, and a base plate 127; the external heat exchanger 2 is the air inlet of the negative pressure chamber 124 of the external heat exchanger.

[0081] Fan 38 is an axial flow fan.

[0082] The base plate 137 and the fan 38 are located inside the housing.

[0083] External heat exchanger 2 is installed on the back and side of the upper section of the air conditioning unit.

[0084] External heat exchanger 2 is a finned tube heat exchanger with a C-shaped horizontal cross section. External heat exchanger 2 is the air inlet of the negative pressure chamber.

[0085] The base plate 127 of the negative pressure chamber 124 of the external heat exchanger is inclined; two exhaust ports of the negative pressure chamber 124 of the external heat exchanger are provided on the base plate 127, and the exhaust ports are equipped with fans 38.

[0086] The fan 38 is tilted at a low position and serves as the air outlet of the negative pressure chamber 124 of the external heat exchanger. The exhaust port of the fan 38 is connected to the exhaust chamber 33, and the air outlet 331 of the exhaust chamber 33 is located on the front of the lower section of the air conditioning unit. The two fans 38 are tilted in the exhaust chamber 33, and the angle λ between the motor shaft of the fan 38 and the vertical direction is 45°.

[0087] An electrical box 128 is installed inside the negative pressure chamber 124 of the external heat exchanger.

[0088] In the outer ventilation blind area below the negative pressure chamber 124 of the external heat exchanger, the bottom plate 127 or the exhaust chamber 33 in the shell 1, there is a compressor chamber 332 for placing the fluorine circuit assembly including the compressor 121 and the gas-liquid separator 126; an electrical box 138 is provided in the ventilation blind area inside the negative pressure chamber 124 of the external heat exchanger.

[0089] The gas-liquid separator 126, compressor 121, external heat exchanger 2, expansion valve and refrigerant pipeline of the indoor unit of the air conditioner are connected in sequence to form the refrigerant circulation loop of the air conditioning system.

[0090] In this embodiment, the air conditioning unit with the rear fan of the external heat exchanger is tilted at a low position. It adopts a complementary structural design, with the compressor 121 located in the ventilation blind area of ​​the lower section of the casing and adjacent to the rear panel, and the electrical box 128 located in the ventilation blind area of ​​the upper section of the casing and adjacent to the front panel. This achieves a complementary design between the internal airflow structure of the external heat exchanger 1-fan 38-air outlet 331 and the compressor cavity 332 and electrical box 128.

[0091] In this embodiment, when the air conditioning unit with the rear fan of the external heat exchanger is tilted at a low position is running, the fan 38, which serves as the air duct power for the external heat exchanger 2, starts to run. It draws air from the negative pressure chamber 124 of the external heat exchanger of the air conditioning unit and generates negative pressure in the negative pressure chamber 124. This draws ambient air through the fin gaps of the external heat exchanger 2 to exchange heat with the refrigerant on the inner side of the pipe. After exchanging heat, the airflow passes through the negative pressure chamber 124 of the external heat exchanger and is drawn in by the fan 38. After being pressurized, it is discharged into the exhaust chamber 33 and finally injected into the atmospheric environment from the air outlet 331 of the exhaust chamber 33 for diffusion and dilution.

[0092] In this embodiment, on the refrigerant side, the refrigerant is driven to circulate by the compressor 121, and the high-efficiency phase change heat of the refrigerant during the circulation process is used to couple the heat absorption of the evaporator in the low-temperature air environment and the heat release of the condenser in the high-temperature air environment.

[0093] In this embodiment, the air conditioning unit, with its compressor 121, four-way valve, expansion valve, gas-liquid separator 126, and other refrigeration circuit components, along with the external heat exchanger 2, refrigerant connecting pipe, indoor unit heat exchanger, and other components, forms a refrigeration and air conditioning cycle circuit in the order of compressor-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor.

[0094] In this embodiment, the compressor 121 serves as the power source for the refrigeration cycle. It establishes high and low pressure states for the refrigerant in the condenser and evaporator pipes, respectively, driving the refrigerant to circulate and undergo repeated phase changes in the refrigeration cycle to achieve "heat transfer." Specifically, the refrigerant liquid absorbs heat by evaporating in the evaporator pipes and then absorbs heat from the low-temperature ambient air flowing between the fins through the large heat-absorbing area of ​​the copper tubes. The high-temperature, high-pressure refrigerant gas releases heat by condensing in the condenser pipes and then releases heat to the high-temperature ambient air flowing between the fins through the large heat-releasing area of ​​the copper tubes. This achieves the migration of heat from the low-temperature environment where the air conditioner evaporator is located to the high-temperature environment where the condenser is located.

[0095] In this embodiment, when the air conditioning unit, equipped with a low-positioned fan, is running, the fan 38, which powers the airflow of the external heat exchanger, starts and operates. It draws air from the negative pressure chamber 124 of the external heat exchanger, creating a negative pressure within the chamber. This negative pressure draws air from the outside of the external heat exchanger, creating a secondary negative pressure zone on the outside of the heat exchanger. This secondary negative pressure then draws ambient air at low speed and with low resistance across the exterior facade. The ambient air flowing through the louvers into the secondary negative pressure zone then flows at low speed into the fin gaps of the heat exchanger on the outside of the air conditioning unit's finned tubes to exchange heat with the refrigerant inside the tubes. After exchanging heat, the airflow passes through the negative pressure chamber of the main unit and is drawn in by the fan. After being pressurized, it is discharged into the exhaust chamber and finally shot into the diving exhaust section from the exhaust chamber outlet of the air conditioning unit. Under the constraint and guidance of the guide plates of the exhaust section parallel or basically parallel to the louver slats, the exhaust airflow passes through the louver slats with low resistance and is finally injected into the atmospheric environment for diffusion and dilution.

[0096] The advantages of this embodiment, which includes a low-positioned air conditioning unit with a fan, are:

[0097] ① Innovate the airflow structure to promote deep integration between the air conditioning unit and the exterior of the equipment platform.

[0098] Because of the modernization and fashion of architecture, because of the pursuit of visual effects of building facades by architects and owners, because of the whole society's love for "architecture is frozen music", and because of the function of louvers in sheltering from wind and rain and preventing wind, frost, snow and ice from corroding the equipment platform and air conditioning unit, the installation method of using louvers to hide the air conditioning unit on the equipment platform will become widespread and solidified. The problems of the classic "rear inlet and front exhaust" air duct of the air conditioning unit's external heat exchanger being obstructed and suppressed by louvers, resulting in increased exhaust static pressure, reduced air volume, and serious degradation of the heat exchange performance of the external heat exchanger are unavoidable.

[0099] In this embodiment, the air conditioning unit of the equipment platform is equipped with a low-positioned fan and air outlet, which creates conditions for the low-resistance exhaust of the external heat exchanger of the unit through the louvers on the exterior facade of the equipment platform: a downward-sloping exhaust section is set up between the air outlet and the louvers on the exterior facade of the equipment platform, forming a low-resistance downward-sloping exhaust of the external heat exchanger to the ambient atmosphere. The direction of the exhaust airflow is parallel to or nearly parallel to the gap between the louver blades. This not only eliminates the obstruction of the exhaust of the unit and the external heat exchanger by the traditional louver slats, effectively connects the air path of the external heat exchanger, and ensures the thermal performance of the unit, but also maintains the decorative appearance of the louver facade. This achieves a perfect unity between the decorative appearance of the equipment platform facade, the visual effect of the building facade, and the excellent thermal performance of the air conditioning unit.

[0100] ② High energy efficiency ratio and economical and practical

[0101] The external heat exchanger of the air conditioning unit installed in this embodiment is located at a low position of the fan. It adopts a C-shaped finned tube heat exchanger with a horizontal cross section. The external heat exchanger has a large ventilation surface area, and the fins that expand a second time on the ventilation surface have an even larger heat exchange area.

[0102] In this embodiment, the fan is installed at a low position, and the negative pressure chamber before the fan intake of the air conditioning unit has a large airflow cross-sectional area, low wind speed, and low friction resistance. Furthermore, the fan in this embodiment can be an axial flow fan, which has low static pressure and large exhaust volume.

[0103] This embodiment, by configuring an external heat exchanger with a large heat exchange area and a negative pressure chamber of the external heat exchanger with a large flow area and low resistance, ensures the load capacity of the air conditioning unit, controls the energy consumption of the air duct, and improves the energy efficiency ratio and economic practicality of the air conditioning unit.

[0104] Example 2

[0105] like Figure 13-17 As shown, both this embodiment and Embodiment 1 are equipment platforms with a fan installed at a low position as the air conditioning unit.

[0106] The difference in this embodiment is that the louvers on the exterior of the equipment platform 5 are provided with a special opening structure 36, and the air outlet 331 of the air conditioning unit is equipped with a special exhaust section 35.

[0107] During installation in this embodiment, the exhaust section 35 installed at the air outlet of the low-position fan air conditioning unit is inserted into the opening structure 36 on the louver.

[0108] In this embodiment, the air conditioning unit with the fan positioned low is a combination of the air conditioning unit and the air source water heater unit with the fan positioned low.

[0109] It includes a housing 1 and two sets of refrigerant circulation systems disposed within the housing 1. The refrigerant circulation system includes an external heat exchanger 2, a gas-liquid separator 126, and a compressor 121, etc. All refrigerant circulation systems share an external heat exchanger 2 and an external heat exchanger negative pressure chamber 124.

[0110] External heat exchanger 2 is a horizontal cross-section C-shaped finned tube external heat exchanger. External heat exchanger 2 is located on the back and side of shell 1, that is, external heat exchanger 2 is rear-mounted.

[0111] The external heat exchanger 2 consists of three finned tube heat exchangers 37 forming a horizontal cross-section C-type finned tube external heat exchanger, that is, a horizontal cross-section C-type two-in-one finned tube heat exchanger.

[0112] The finned tube heat exchanger 37 includes finned plates 110 and heat exchange tubes 115; multiple parallel finned plates 110 with a certain distance between them form a fin group; and heat exchange tubes 115 are inserted in a direction perpendicular to the plane of the finned plates 110.

[0113] Three sets of heat exchange tube groups 116 are arranged in parallel along the short side of the finned plate 110; the heat exchange tubes 115 in the heat exchange tube group 116 are arranged along the long side of the finned plate 110; the three sets of heat exchange tube groups 116 are arranged in parallel and connected to compressors of different refrigerant circulation systems; the fins between each heat exchange tube group 116 form fin thermal bridges in the horizontal and vertical directions.

[0114] There are 3 sets of heat exchange tubes 116 installed in the finned plate 110, and the middle set of heat exchange tubes 116 is the heat exchange tube 128 of the air source water heater.

[0115] The finned plate 110 includes two sets of heat exchange tubes 116 for air conditioning systems, and the air source water heater heat exchange tube 128 is located between adjacent heat exchange tubes 116 for air conditioning systems.

[0116] The finned plate 110 includes four sets of heat exchange tube groups I 117, II 118, and IV 120 for air conditioning systems. The heat exchange tube group 128 of the air source water heater is located between adjacent heat exchange tube groups for air conditioning systems, and the fins between each heat exchange tube group form thermal bridges in the transverse and longitudinal directions.

[0117] The two ends of heat exchanger tube assembly I117 and heat exchanger tube assembly II118 are respectively connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of air conditioning compressor I121.

[0118] The heat exchange tube assembly 128 of the air source water heater is connected to the refrigerant liquid pipe and refrigerant gas pipe of the air source water heater compressor Ⅲ 129 respectively.

[0119] The heat exchange tube group 116 in the same row is connected in parallel to the refrigerant pipeline of the same air conditioning compressor.

[0120] Heat exchanger tube group I 117 and heat exchanger tube group III 119 in the same row are connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of the air conditioning compressor I.

[0121] Heat exchanger tube group II 118 and heat exchanger tube group IV 120 in the same row are connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of the air conditioning compressor I.

[0122] Evaporation pressure is the primary factor in heat pump systems, and its impact on the performance of refrigeration and heat pump systems is as follows: Figure 2 As shown (the vertical axis represents condensation pressure, the horizontal axis represents enthalpy, 1-2-3-4 in the figure represents the original circulation path, and 1-2-3'-4' represents the circulation path of this invention):

[0123] (1) The increase in evaporation pressure (P1→P1') directly leads to an increase in the heat absorbed by the refrigerant per unit mass in the refrigeration system (h4'-h4) and a decrease in the compressor's compression work (h4'-h4), thereby improving the energy efficiency ratio;

[0124] (2) The increase in evaporation pressure (P1→P1') also directly leads to an increase of approximately (P1' / P1-1)×100% in the refrigerant circulation of the fixed frequency heat pump system, resulting in an increase of approximately (P1' / P1-1)×100% in the heat absorption power of the evaporator and the heating power of the condenser.

[0125] (3) Increased evaporation pressure also directly leads to a decrease in compression ratio and a decrease in compressor exhaust temperature, effectively inhibiting the deterioration of lubricating oil and the degradation of compressor motor insulation performance.

[0126] In this embodiment, the air conditioner and air-water heater are integrated into a fan unit at a low position. In the allocation of copper tube fin resources of the two-in-one external heat exchanger, the air conditioner unit accounts for the majority, for example, about 2 / 3, while the air-source water heater accounts for the minority, for example, about 1 / 3.

[0127] The two-in-one external heat exchanger module in this embodiment adopts a three-section flat plate type three-row finned tube heat exchanger to form a horizontal cross-section C-shaped integrated three-sided structure. The horizontal cross-section C-shaped finned tube heat exchanger has three-sided ventilation. The middle row structure of the three rows of finned tubes of the horizontal cross-section C-shaped finned tube heat exchanger belongs to the external heat exchanger of the air source water heater unit. The inner (row) and outer (row) structures of the three rows of finned tubes of the horizontal cross-section C-shaped finned tube heat exchanger are enjoyed by the air conditioning unit. The external heat exchanger of the air conditioning unit and the evaporator of the air source water heater are complementary in structure and the air path is combined through the lateral thermal bridge effect of the fins.

[0128] In this embodiment, the air conditioning unit and air-water heater unit are integrated with the fan at a low position. The horizontal cross-section C-shaped external heat exchanger has three layers (rows) of fins that are continuous in both the inner, middle and outer directions. The middle layer air source water heater unit evaporator and the inner and outer layers air conditioning unit finned tube external heat exchanger are connected by a thermal bridge in the fins. This enables the operating external heat exchanger to effectively utilize the heat exchange area of ​​the fins of the shut-down external heat exchanger, thereby expanding the heat exchange area of ​​the fins of the operating external heat exchanger, reducing the heat transfer temperature difference of the external heat exchanger body, and improving the energy efficiency ratio of the operating unit system.

[0129] In this embodiment, the air conditioning unit and air source water heater unit are integrated with the fan at a low position. The external heat exchanger negative pressure chamber 124 of the air conditioning unit and air source water heater unit is constructed by enclosing a part of the shell (including wall panel and top plate) and a horizontal cross-section C-shaped finned tube heat exchanger. The external heat exchanger 2 of the air conditioning unit and air source water heater unit has a complementary structure and combined air path. It shares the air inlet, external heat exchanger negative pressure chamber 124, fan 38, exhaust chamber 33 and air outlet 331, which ensures that the external heat exchanger 2 can be ventilated and heat exchanged evenly when the air conditioning unit and air source water heater unit are running synchronously or independently.

[0130] In addition to merging the airflow path, this embodiment also adopts a complementary structural design. The compressor 121, four-way valve, throttle valve and other refrigerant circuit components are placed in the ventilation blind area below the exhaust cavity and adjacent to the rear panel. The electrical box 138 is placed in the ventilation blind area in front of the negative pressure cavity 124 of the external heat exchanger and adjacent to the front panel. This achieves the complementarity between the internal airflow path structure of the external heat exchanger-external heat exchanger negative pressure cavity-fan-exhaust cavity-air outlet and the structure of the compressor cavity 332 and electrical box 138.

[0131] In this embodiment, the air conditioning unit and air source water heater unit are integrated with the fan at a low position. The air conditioning unit and the air source water heater unit are two systems, and the refrigerant circuits of both systems are open circuit systems. The refrigerant circuit system of the air conditioning unit is connected to the refrigerant circuit of the indoor air conditioning unit 131 to form a closed-loop air conditioning refrigerant circulation system. The refrigerant circuit system of the air source water heater unit is connected to the condenser 71 in the water tank 7 to form a closed-loop air source water heater refrigerant circulation system.

[0132] In this embodiment, the air conditioning unit and air source water heater are integrated with the fan positioned at a low position. This effectively develops the redundancy of the external heat exchanger and fan of the residential central air conditioning unit, and improves the overall energy efficiency of the air conditioning and water heater combined system.

[0133] In this embodiment, when the air conditioning unit of the equipment platform with the fan installed at a low position is running, the fan, which serves as the power source for the airflow of the external heat exchanger, starts and runs, drawing air from the negative pressure chamber of the external heat exchanger and generating negative pressure in the negative pressure chamber. The negative pressure in the negative pressure chamber pulls the air outside the external heat exchanger into the negative pressure chamber, thereby creating a secondary negative pressure zone outside the external heat exchanger. The secondary negative pressure outside the external heat exchanger pulls the ambient air to flow slowly and with low resistance through the louvers on the exterior facade. The ambient air flowing through the louvers into the secondary negative pressure zone then flows slowly into the fin gaps of the finned tube external heat exchanger to exchange heat with the refrigerant inside the tube. After exchanging heat, the airflow passes through the negative pressure chamber of the external heat exchanger and is drawn in by the fan. After being pressurized, it is discharged into the exhaust chamber and finally injected into the exhaust section from the exhaust chamber outlet, and finally directly injected into the atmospheric environment for diffusion and dilution.

[0134] In this embodiment, because the louvers on the exterior facade of the equipment platform have a special opening structure and the air outlet of the air conditioning unit is equipped with a special exhaust section, the ventilation resistance of the external heat exchanger is smaller and the ventilation efficiency is higher.

[0135] In this embodiment, the air conditioning unit with the rear fan of the external heat exchanger is tilted at a low position. It adopts a two-section cavity structure with the upper and lower cavities connected vertically to form the negative pressure cavity 124 of the external heat exchanger and the internal air duct of the air conditioning unit. The external heat exchanger 2 is located on the back and side of the upper section of the air conditioning unit. The external heat exchanger 2 is the air inlet of the negative pressure cavity 124 of the external heat exchanger, and the fan 38 is the air outlet of the negative pressure cavity 124 of the external heat exchanger. The fan 38 is connected to the exhaust cavity 33, and the air outlet 331 of the exhaust cavity 33 is located on the front of the lower section of the air conditioning unit.

[0136] This embodiment utilizes the complementary structure and combined airflow of the air conditioner's external heat exchanger and the air source water heater's evaporator. During operation, the lateral fins between the two refrigerant piping systems of the air conditioner's external heat exchanger and the air source water heater's evaporator act as a "thermal bridge," leveraging the redundancy of the residential central air conditioning unit's external heat exchanger to enhance the heat absorption area and capacity of the water heater's evaporator.

[0137] ① If the air conditioner unit is in cooling operation, its external heat exchanger 2 acts as a condenser, directly introducing part of the high-temperature condensation heat of the refrigerant into the evaporator pipe of the water heater through the vertical fin heat bridge, thereby increasing the refrigerant evaporation temperature and evaporation pressure of the evaporator.

[0138] ② If the air conditioner is in heating mode, its external heat exchanger acts as an evaporator, absorbing heat from the ambient airflow together with the water heater evaporator. If the air conditioner is in low-load operation during heating, its external heat exchanger has redundant capacity, which can still be utilized by the water heater evaporator through the horizontal fin thermal bridge, increasing the evaporation temperature and pressure of the water heater evaporator. If the air conditioner is in high-load operation during heating, the air source water heater and the air conditioner can be set to operate at different times through the control system. When the control system detects that the air conditioner has stopped running, it will start the air source water heater to heat the cold water in the tank.

[0139] ③ If the air conditioner unit is not running, the fins on its inner and outer heat exchangers that are close to the middle pipe of the water heater evaporator serve as a lateral extension of the evaporator fins, which expands the effective heat absorption area of ​​the evaporator. Under certain heat absorption power and certain ambient temperature and humidity conditions, it reduces the heat transfer temperature difference of the evaporator itself and increases the refrigerant evaporation temperature and evaporation pressure of the evaporator.

[0140] In this embodiment, the water heater evaporator utilizes the thermal bridge effect of the fins to explore and utilize the capacity of the external heat exchanger of the air conditioner unit. The technical effect is mainly reflected in the improvement of the evaporation temperature and evaporation pressure of the water heater evaporator.

[0141] In this embodiment, the air conditioning unit and the air source water heater unit are integrated in a low-positioned air-conditioning unit and air source water heater unit, respectively. The air conditioning unit and the air source water heater unit can operate simultaneously or independently.

[0142] Example 3

[0143] like Figure 18 As shown, the air conditioning unit in this embodiment is similar to that in embodiment 1, except that an intermediate heat exchanger 6 is provided in the compressor cavity 332 of the air conditioning unit where the fan is tilted at a low position. The two heat exchange medium channels of the intermediate heat exchanger 6 are the refrigerant channel and the air conditioning water channel, respectively.

[0144] In this embodiment, the air conditioning unit with the fan tilted at a low position produces chilled water (hot water) through the intermediate heat exchanger 6 and delivers it to the indoor unit 131 for cooling and dehumidifying (heating) the indoor air; the intermediate heat exchanger 6 is selected from plate heat exchangers, shell and tube heat exchangers, coaxial heat exchangers or combinations thereof.

[0145] In this embodiment, the air conditioning unit with the fan tilted at a low position adds an intermediate heat exchanger 6 to output air conditioning water to the indoor units inside the building, thus isolating the refrigerant on the outer corridor-type equipment platform. This eliminates the risk of refrigerant leakage and accumulation inside the building, creating conditions for the use of environmentally friendly refrigerants such as R290, which have zero greenhouse effect and zero ozone layer depletion effect but are flammable.

[0146] 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 low-positioned, tilted air conditioning unit platform, characterized in that, The air conditioning unit, with its fan positioned at a low angle, is installed within the outer corridor-type equipment platform. The air outlet of the air conditioning unit's exhaust chamber faces the outer facade of the outer corridor-type equipment platform. An exhaust section for guiding the airflow is provided at the air outlet of the air conditioning unit. Several guide plates are installed within the exhaust section of the air conditioning unit. The guide plates are arranged parallel to or nearly parallel to the louvers of the outer corridor-type equipment platform outside the air conditioning unit. The air conditioning unit with the rear fan of the external heat exchanger is set at a low and inclined position. It adopts a two-section cavity structure with the upper and lower cavities connected vertically to form the negative pressure cavity of the external heat exchanger, the exhaust cavity and the internal air duct of the air conditioning unit. An air conditioning unit includes a casing, an external heat exchanger, a fan, and a compressor; The external heat exchanger is located at the upper part of the shell; the fan is connected to the negative pressure chamber of the external heat exchanger and is located below the negative pressure chamber of the external heat exchanger; the lower part of the shell is provided with a fan outlet; The air outlet is located on the front of the casing; The negative pressure chamber of the external heat exchanger consists of an external heat exchanger, a part of the shell, and a base plate; the external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger; the external heat exchanger is located on the back and side of the upper section of the air conditioning unit. The upper part of the shell is provided with an air inlet adapted to the external heat exchanger; the air inlet is located on the back and side of the shell; The base plate is provided with several exhaust ports for the negative pressure chambers of the external heat exchanger, and each exhaust port is equipped with an axial flow fan; The base plate is inclined, with an angle θ between the base plate and the vertical direction of 30 to 60°; the motor shaft of the fan has an angle λ between the base plate and the vertical direction of 30 to 60°.

2. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, The exhaust section is installed adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

3. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, The exterior louvers of the external corridor-type equipment platform are provided with opening structures that match the exhaust section; the exhaust section is embedded in the louver opening structure.

4. The air conditioning unit platform with the fan tilted at a low position according to claim 3, characterized in that, The opening structure is rectangular, with its long side parallel to the bottom or side of the outer corridor-type equipment platform.

5. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, The air conditioning unit with the fan tilted at a low position includes a housing and at least two sets of refrigerant circulation systems disposed within the housing. The refrigerant circulation system includes an external heat exchanger and a compressor. All refrigerant circulation systems share an external heat exchanger and a negative pressure chamber for the external heat exchanger.

6. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, The upper part of the housing is provided with an air inlet adapted to the external heat exchanger; the air inlet is located on the front, side and / or back of the housing.

7. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, A compressor chamber, which houses the refrigerant circuit assembly including the compressor, is provided in the ventilation blind area below the negative pressure chamber of the external heat exchanger, the bottom plate, or the exhaust chamber in the housing; an electrical box is provided in the ventilation blind area inside the negative pressure chamber of the external heat exchanger.

8. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, The external heat exchanger is a horizontal cross-section C-type finned tube external heat exchanger, a horizontal cross-section L-type finned tube external heat exchanger, a flat plate finned tube external heat exchanger, a horizontal cross-section V-type finned tube heat exchanger assembly, or a sawtooth-shaped zigzag finned tube heat exchanger assembly.

9. The air conditioning unit platform with the fan tilted at a low position according to claim 1, characterized in that, An intermediate heat exchanger is also provided, wherein the two heat exchange medium channels of the intermediate heat exchanger are the refrigerant channel of the air conditioning unit and the air conditioning water channel, respectively; the refrigerant channel is connected to the refrigerant circuit of the air conditioning unit; and the air conditioning water channel is connected to the indoor heat exchanger of the air conditioning unit.

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