A fan rear-mounted double-air-duct double-refrigeration-system main machine fusion body and an equipment platform thereof

Abstract

This invention belongs to the field of new energy technology and discloses a main unit fusion body and equipment platform of a dual-airflow dual-refrigeration system with a rear-mounted fan. The main unit fusion body includes a shell, two sets of refrigerant circulation systems, and an exhaust chamber. The refrigerant circulation system includes an external heat exchanger and a compressor. Each set of refrigerant circulation systems has an independent negative pressure chamber for the external heat exchanger, which is composed of an external heat exchanger, part of the shell, and a back plate. Several exhaust ports for the negative pressure chambers of the external heat exchangers are provided on the back plate, and the exhaust ports are equipped with fans. The exhaust ports are connected to the exhaust chambers, and the air outlets of the exhaust chambers are located on the same side as the air inlets of the shell. The external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger. This invention innovates the high-efficiency heat exchange airflow structure of the external heat exchanger assembly of the air conditioning main unit, improving the energy density of the main body; constructs a high-efficiency airflow system that traverses the exterior facade of the equipment platform; improves the power density of the equipment platform; and reduces the footprint of the equipment platform.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, and in particular relates to a main unit and equipment platform of a dual-duct dual-cooling system for a rear-mounted wind turbine. Background Technology

[0002] The heat in an air source heat pump water heater comes from the air. The heat released by the condenser of the air source heat pump water heater is mainly the heat absorbed by the evaporator from the air. If the evaporator of the water heater unit cannot effectively ventilate to the ambient atmosphere, the air outlet of the evaporator will circulate and short-circuit within the small space of the equipment platform, causing the temperature of the small space of the equipment platform to drop continuously. In turn, this further reduces the evaporation pressure of the evaporator and severely reduces the heating capacity. This phenomenon is more serious in the low-temperature season, and the heat pump unit of the water heater degenerates into an electric heating element.

[0003] like Figure 1 As shown, the pursuit of visual appeal by architects, owners, and society regarding the building's facade has led to the air conditioning units on the equipment platform being concealed by the facade's louvers. The classic rear-in, front-out air conditioning unit's exhaust to the outside atmosphere is obstructed, resulting in a significant decrease in heat exchange performance. Medium-speed exhaust units (below 7 m / s) also obstruct exhaust to the outside atmosphere, leading to increased exhaust static pressure, decreased exhaust velocity, and reduced airflow. A significant portion of the reduced exhaust airflow is blocked by the louvers and returned to the equipment platform, where it is re-drawn into the external heat exchanger, causing airflow short-circuiting. The diffusion and dilution effect of exhaust air passing through the facade louvers and entering the ambient atmosphere is severely suppressed. This results in excessively high condensing pressure and insufficient condensate cooling in the external heat exchanger during summer cooling operation, and excessively low evaporating pressure and a significant decrease in refrigerant circulation during winter heating operation. Consequently, the air conditioner cannot fully perform its function as a heat transporter, and the performance of the air conditioning unit on the equipment platform is significantly lower than laboratory data.

[0004] Residential central air conditioning units and air source water heaters have become standard configurations in pre-furnished apartments. However, classic residential central air conditioning units and air source water heaters still have the following problems:

[0005] ① Performance degradation of the air conditioning unit and air source water heater on the equipment platform

[0006] The air conditioning unit and air source water heater unit located behind the louvers on the exterior facade of the equipment platform have their ventilation to the outside atmosphere obstructed. The diffusion and dilution effect of the exhaust air entering the ambient atmosphere through the louvers is severely suppressed. This results in excessively high condensing pressure and insufficient cooling of the condensate in the external heat exchanger during summer cooling operation, and excessively low evaporating pressure and a significant reduction in refrigerant circulation during winter heating operation. As a result, the air conditioning unit and air source water heater cannot fully perform their function as heat transporters, and the thermal performance of the air conditioning unit and air source water heater on the equipment platform is significantly reduced compared to laboratory data.

[0007] ② Redundant allocation of equipment resources

[0008] Both air conditioning units and air source water heater units are vapor compression refrigeration equipment. Not only do they have the same working principle, but their electromechanical structures are also very similar. They are both compressor-driven refrigerant circuit systems consisting of a compressor, condenser, expansion valve, and evaporator, as well as high-temperature heat source medium systems and low-temperature heat source medium systems driven by fans and water pumps.

[0009] Configuring two physically independent air conditioning units and heat pump water heaters with the same principle and similar structure in a confined space is a duplication of refrigeration equipment resources and a waste of refrigeration equipment resources.

[0010] ③ The area of ​​inefficient and ineffective equipment platforms increases.

[0011] Residential central air conditioning units and air source water heaters (including the main unit and water tank) have become standard configurations on residential equipment platforms;

[0012] Because air conditioning units, air source water heaters, and other equipment on the residential equipment platform need to be arranged separately as independent units, and air intake channels need to be reserved for the external heat exchangers of the air conditioning units with rear-inlet / front-outlet and side-inlet / side-outlet air duct structures, as well as air intake and exhaust channels for the evaporators of the air source water heaters, the distance between the central air conditioning units, air source water heaters, and water tanks on the equipment platform increases, resulting in an increase in ineffective and inefficient area. Summary of the Invention

[0013] To address the aforementioned technical problems, this invention provides a fusion of a rear-mounted dual-duct dual-cooling system main unit;

[0014] Another objective of this invention is to provide a device platform for assembling a main unit of a dual-air duct dual-cooling system with a rear-mounted fan.

[0015] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0016] A fan-mounted dual-duct dual-refrigeration system main unit includes a housing, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber; the refrigerant circulation system includes an external heat exchanger and a compressor;

[0017] Each refrigerant circulation system has an independent external heat exchanger negative pressure chamber, which consists of an external heat exchanger, a part of the shell, and a back plate.

[0018] The back plate is provided with a plurality of exhaust ports for the negative pressure chambers of the external heat exchanger. Each exhaust port is equipped with a fan and is connected to the exhaust chamber. The air outlet of the exhaust chamber is located on the same side as the air inlet of the shell. The external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger.

[0019] Furthermore, the air outlet of the exhaust chamber faces the short side of the housing.

[0020] Furthermore, the external heat exchanger is a horizontal cross-section V-shaped finned tube heat exchanger assembly or a sawtooth-shaped zigzag finned tube heat exchanger assembly; the horizontal cross-section V-shaped finned tube heat exchanger assembly includes at least two flat plate finned tube heat exchangers; or it is composed of a V-shaped finned tube heat exchanger formed by bending flat plate finned tube heat exchangers; or it is composed 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 fin is zigzag.

[0021] The long sides of the fins of the flat plate finned tube heat exchanger are arranged in the vertical direction or close to the vertical direction in the horizontal air duct.

[0022] Furthermore, the horizontal cross-section V-shaped finned tube heat exchanger assembly has a V-shaped or N-shaped cross-section perpendicular to the long side of the fin, or is composed of at least two V-shaped finned tube heat exchangers arranged continuously.

[0023] Preferably, the cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly perpendicular to the long side of the fins is W-shaped; preferably, the apex angle α of the V-shaped finned tube heat exchanger is 15°~110°.

[0024] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30°~90°.

[0025] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30°~60°.

[0026] Furthermore, in the horizontal cross-section V-shaped finned tube heat exchanger assembly, one side of the cross-section perpendicular to the long side of the fin is the air inlet surface of the heat exchanger, and the other side is the air outlet surface of the heat exchanger; the air outlet surface belongs to the negative pressure chamber area of ​​the external heat exchanger.

[0027] Furthermore, the incident surface of the inlet airflow is each flat plate finned tube heat exchanger, and the angle between the inlet airflow and the tip of each finned plate on each flat plate finned tube heat exchanger is an obtuse angle; the obtuse angle β is 97.5°~145°; the inlet airflow strikes the tip of each finned plate at an obtuse angle β, is reflected by the fin tip plate and enters the fin gap to flow into the negative pressure chamber of the outer heat exchanger.

[0028] Furthermore, the airflow rate entering each fin gap d is equal to the airflow intercepted by the vertical distance δ between the tips of the two finned plates on the air inlet section of the flat plate finned tube heat exchanger.

[0029] δ = d • sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0030] The vertical distance δ between the tips of the front and rear finned tube heat exchangers on the air inlet section is between 0.13d and 0.7d.

[0031] Preferably, the airflow velocity between the fins is 1 / 3 of the inlet velocity, corresponding to a vertex angle α of 39° and an incident obtuse angle β of 109.5° for the V-shaped finned tube heat exchanger.

[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 cross-section of the sawtooth-shaped zigzag finned tube heat exchanger assembly perpendicular to the long side of the fin is N-shaped, or it is W-shaped, consisting of a V-shaped finned tube heat exchanger perpendicular to the long side of the fin, a baffle plate, and a flat plate finned tube heat exchanger; or it is composed of a V-shaped finned tube heat exchanger, two baffle plates, and two flat plate finned tube heat exchangers.

[0034] Furthermore, the angle γ between the partition and the flat-plate finned tube heat exchanger is 0.5α;

[0035] The angle ε between the partition and the V-shaped finned tube heat exchanger is 0.5α.

[0036] The heat exchange tubes of the serrated zigzag finned tube heat exchanger assembly are parallel to the serrated edges; the fins of the finned tube heat exchanger are orthogonally fitted onto the heat exchange tubes.

[0037] The serrated zigzag finned tube heat exchanger assembly, together with the upper and lower base plates and the left and right side plates, forms the negative pressure chamber of the external heat exchanger.

[0038] The heat exchange tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0039] The serrated zigzag finned tube heat exchanger assembly divides the heat exchange air duct into a front chamber and a rear chamber. The front chamber is the air inlet chamber, and the rear chamber is connected to the air intake of the ventilation unit and is the negative pressure chamber of the external heat exchanger.

[0040] Preferably, the heat exchange tube forms an obtuse angle with the sidewall of the negative pressure chamber of the adjacent external heat exchanger.

[0041] Furthermore, the two external heat exchanger negative pressure chambers are arranged vertically or horizontally side by side. That is, the external heat exchangers are arranged vertically or horizontally side by side.

[0042] Furthermore, the back panel is provided with at least two exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall; preferably, the fan is a centrifugal fan or an axial fan; more preferably, the centrifugal fan is a backward-inclined external rotor centrifugal fan.

[0043] Preferably, the back panel is provided with 4 or 6 exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall.

[0044] Furthermore, the exhaust cavity is a cavity with a unidirectional air outlet, including a vertical exhaust cavity, or composed of interconnected vertical exhaust cavities and horizontal exhaust cavities; or composed of interconnected vertical exhaust cavities and lateral exhaust cavities; wherein, the horizontal exhaust cavity is located below the bottom plate of the negative pressure cavity of the external heat exchanger or above the top plate of the negative pressure cavity of the external heat exchanger.

[0045] Furthermore, a compressor chamber for installing a refrigerant circuit assembly including an air conditioning compressor, a four-way valve, an expansion valve, and an electrical box is provided on the rear side of the back plate of the exhaust cavity; or, a compressor chamber for installing a refrigerant circuit assembly including an air conditioning compressor, a gas-liquid separator, a four-way valve, an expansion valve, and an electrical box is provided on the outer side of the negative pressure chamber of the outer heat exchanger of the housing.

[0046] The gas-liquid separator, air conditioning compressor, four-way valve, heat exchanger assembly, expansion valve, and refrigerant pipeline of the indoor unit of the air conditioner are connected to form the refrigerant circulation loop of the air conditioning system.

[0047] Furthermore, an exhaust section is provided at the air outlet.

[0048] Furthermore, the exhaust section is provided with several guide vanes; the guide vanes are arranged parallel to or nearly parallel to the louvers, or the guide vanes are arranged vertically and are provided with an angle to guide the exhaust airflow away from the air conditioning unit.

[0049] Furthermore, a swooping exhaust section is provided at the air outlet; the swooping exhaust section is provided with several guide vanes.

[0050] Furthermore, a protruding exhaust section is provided at the air outlet; several guide plates are provided inside the protruding exhaust section.

[0051] Furthermore, the sides of the negative pressure chamber and exhaust chamber of the external heat exchanger are provided with a compressor chamber for housing the fluorine circuit assembly, including the compressor, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0052] Furthermore, the air conditioning unit is also equipped with an intermediate heat exchanger, the two heat exchange medium channels of which are the refrigerant channel and the air conditioning water channel of the air conditioning unit, respectively; the refrigerant channel is connected to the refrigerant circuit of the air conditioning unit; the air conditioning water channel is connected to the indoor heat exchanger of the air conditioning unit.

[0053] An equipment platform, wherein the host fusion body is disposed within an outer corridor-type equipment platform, and the air outlet of the exhaust chamber faces the outer facade of the outer corridor-type equipment platform.

[0054] Furthermore, an exhaust section is provided at the air outlet; the exhaust section is provided adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

[0055] Furthermore, a swooping exhaust section is provided at the air outlet; the swooping exhaust section is provided adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform; the guide plates of the swooping exhaust section are parallel to or nearly parallel to the louvers.

[0056] Furthermore, an exhaust section is provided at the air outlet; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with an opening structure matching the exhaust section; the exhaust section is embedded in the louver opening structure.

[0057] Furthermore, a protruding exhaust section is provided at the air outlet; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with an opening structure matching the protruding exhaust section; the protruding exhaust section is embedded in the louver opening structure.

[0058] Furthermore, the opening structure of the louver is rectangular, with its long side parallel to the bottom or side of the equipment platform.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The advantages of the present invention, which integrates a rear-mounted dual-duct main unit for the fan, are:

[0061] ① Construct a high-efficiency heat exchange air path structure for the main unit integrated with the external heat exchanger assembly to improve the energy density of the main unit.

[0062] This invention uses a horizontal V-shaped finned tube heat exchanger as the basic unit of the two external heat exchanger assemblies of the main unit fusion body. Within the limited space of the fusion body, the horizontal V-shaped finned tube heat exchanger is set parallel to the air inlet surface of the main unit. It is spread along the air inlet surface of the horizontal V-shaped finned tube heat exchanger to obtain a large area of ​​ventilation surface of the heat exchanger assembly. It is then spread again on the large area of ​​ventilation surface of the heat exchanger assembly to obtain a huge area of ​​finned heat transfer surface.

[0063] In the chain process of the main unit of this invention, the airflow is driven by the fan and the core is a large number of continuously arranged V-shaped heat exchanger fin planers. The airflow is driven by the fan and the core is the airflow path structure with high efficiency heat exchange inside the main unit.

[0064] This invention features a vertically arranged centrifugal fan with the air inlet directly facing the external heat exchanger assembly. This reduces the local resistance of the airflow turning upwards before the inlet of a traditional multi-split air conditioner fan, causing the airflow lines to enter and exit the fin gaps in a zigzag pattern within a plane perpendicular to the long side of the fins. This generates local resistances such as airflow impacting the fin tips and turning, airflow deceleration due to the expansion of the flow cross-section within the fin gaps, and airflow acceleration due to turning out of the fin gaps. The local resistance of the airflow entering and exiting the fin gaps is greater than the resistance of the inlet section before the finned tube heat exchanger assembly and the resistance of the outlet section afterward, making the "throttling" effect of the fin gaps on the airflow more significant. This improves the uniformity and intensity of ventilation and heat transfer on the surface of the finned tube external heat exchanger assembly.

[0065] This invention overcomes the problem of uneven vertical ventilation heat exchange in traditional multi-split air conditioners, allowing the height of the external heat exchanger to exceed the traditional design of around 1200mm for multi-split air conditioners, reaching over 2000mm, thus improving the energy density of the main unit.

[0066] ②This created conditions for constructing a through-type louvered air duct on the exterior facade of the equipment platform.

[0067] This invention is not only compact in structure, but also features air inlets and outlets of the main unit arranged in the same direction, on the same side, and vertically, which prepares the conditions for the main unit to be installed on the equipment platform adjacent to the exterior facade and to cooperate with the equipment platform facade to construct a louvered air duct structure that runs through the exterior facade of the main unit.

[0068] Under the design concept of the air inlet area: air outlet area ≈ 2:1 of the main unit fusion body, the exhaust air velocity reaches twice the air inlet velocity, and the exhaust air dynamic pressure head reaches four times the air inlet dynamic pressure head. This effectively improves the exhaust air velocity and kinetic energy of the external heat exchanger of the main unit fusion body, and effectively improves the range and diffusion dilution effect of the exhaust air jet of the main unit fusion body penetrating the outer facade of the equipment platform and entering the ambient atmosphere.

[0069] The advantages of the equipment platform for installing the integrated host of the rear-mounted dual-duct dual-cooling system of the present invention are:

[0070] ① Construct an efficient airflow system that traverses the exterior facade of the equipment platform.

[0071] This invention establishes an aerodynamic layout of "medium-speed air intake in the upper middle part of the platform facade and the main unit fusion body, high-speed air exhaust at the bottom, with the air intake and exhaust ports set in the same direction and on the same side, and the air intake area: exhaust area ≈ 2:1". It incorporates the main sections of the air intake and exhaust channels of the two external heat exchanger assemblies of the air conditioner water heater into the main unit fusion body, and constructs a side-intake and side-out air duct structure system for the main unit fusion body equipment platform.

[0072] In this invention, under the design concept of air inlet area: air outlet area ≈ 2:1 on the outer facade of the equipment platform, the exhaust speed reaches twice the air inlet speed, and the exhaust dynamic pressure head reaches four times the air inlet dynamic pressure head, which effectively improves the exhaust speed, kinetic energy and exhaust effect of the main unit integrated with the external heat exchanger.

[0073] In particular, the low-position exhaust cavity design of this invention, which uses a backward-inclined external rotor centrifugal fan with guide plate assembly close to the equipment platform ground, can be matched with the inclined louver structure of decorative louvers commonly used on building facades. This allows the exhaust airflow to be guided by the inclined louvers on the facade and diffused into the ambient atmosphere at a small angle. This maintains the functionality and aesthetics of the louvered building facade in preventing wind and rain from entering the equipment platform, while effectively improving the range and diffusion dilution effect of the exhaust air from the main unit integrated with the external heat exchanger as it passes through the equipment platform facade and enters the ambient atmosphere. This fundamentally solves the problem of severe performance degradation of the air conditioning and water heater main unit caused by the louvers on the equipment platform facade.

[0074] ②Increase the power density of the equipment platform and reduce the footprint of the equipment platform.

[0075] The main unit fusion used in this invention continuously sets up horizontal V-shaped finned tube heat exchangers within the limited space of the fusion unit, unfolding a large area of ​​heat exchanger ventilation surface, and then unfolding a huge area of ​​finned heat transfer surface a second time on the large area of ​​heat exchanger ventilation surface, thereby effectively expanding the total heat transfer area of ​​the heat exchanger assembly outside the main unit fusion unit, reducing the heat transfer temperature difference of the heat exchanger body, increasing the evaporation pressure and reducing the condensation pressure, improving the cooling capacity and energy efficiency ratio of the refrigeration and air conditioning system, and constructing a heavy-duty main unit fusion unit.

[0076] This invention, based on a heavy-duty integrated main unit, innovates the equipment platform layout by reducing the lateral spacing between main units and combining pedestrian walkways, maintenance walkways, and copper pipe cable tray walkways into one. By setting up a low-level exhaust chamber for the main unit at the bottom of the equipment platform, the height of the main unit is raised, utilizing the unused space at the top of the equipment platform. This significantly reduces the floor space occupied by ineffective and inefficient spaces and ventilation blind spots on the equipment platform, increasing the average cooling and heating power density (i.e., cooling and heating capacity per unit area) of the equipment platform from the current approximately 11.6 kW / ㎡ to over 25 kW / ㎡, an increase of over 100%. Under the same cooling and heating load, it saves more than half of the equipment platform area.

[0077] ③Reduce the horizontal width of the equipment floor facade occupied by the air inlet and outlet surfaces of the main unit.

[0078] The width of a building facade is a crucial resource in the building index system, second only to the building area. Currently, the air inlet and outlet surfaces of air conditioning and water heater units occupy too much of the horizontal width of the building's equipment floor facade, which obstructs ventilation, lighting, and visual communication between the interior space and the external environment on the same floor. This has become a prominent problem in building HVAC design.

[0079] This invention improves the power density of the air conditioning water heater main unit by reorganizing the two external heat exchangers and their air inlet and outlet paths within the main unit. Furthermore, by reorganizing the structural relationship between the main unit and the equipment platform, it significantly reduces inefficient and ineffective space. As a result, under the same building heat load conditions, it significantly reduces the lateral width of the building equipment floor facade occupied by the air inlet and outlet surfaces of the air conditioning water heater main unit, ensuring ventilation, lighting, and visual communication between the interior space of the same floor and the external environment.

[0080] ④ Facilitate the testing and repair of mainframe fusion systems

[0081] The main unit used in this invention integrates the compressor, gas-liquid separator, four-way valve, expansion valve, electrical box, fan and other fluorine circuit components into the compressor chamber outside the exhaust chamber of the external heat exchanger assembly.

[0082] This invention positions the compressor chamber panel of the main unit fusion assembly facing the maintenance channel on the inside of the equipment platform, greatly facilitating the inspection and maintenance of the main unit fusion assembly. When a fault occurs, the compressor chamber panel of the main unit fusion assembly can be opened through the maintenance channel on the inside of the equipment platform. The compressor, gas-liquid separator, four-way valve, expansion valve, electrical box, fan, and other refrigerant circuit components that may be faulty are clearly visible, making inspection and maintenance very convenient. This solves the inherent historical inspection and maintenance problem of the main unit fusion assembly (outdoor unit).

[0083] This invention eliminates the obstruction of the louvers to the exhaust of the external heat exchanger, effectively opens the air path of the external heat exchanger, and ensures the thermal performance of the main unit fusion body. At the same time, it maintains the decorative appearance of the louver facade, and 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 main unit fusion body. Attached Figure Description

[0084] Figure 1 This is a top view of the airflow path of the external heat exchanger of a central air conditioning unit with a rear-inlet and front-outlet airflow. Due to the obstruction of the airflow by the louvers on the equipment platform, the static pressure of the outlet air increases, the airflow decreases, and some of the outlet air flows back to the air inlet.

[0085] Figure 2 This is a three-dimensional sectional view of the main unit of the dual-air duct dual-cooling system with rear-mounted fan in Example 1;

[0086] Figure 3 This is a vertical sectional view of the main unit of the dual-air duct dual-cooling system with rear-mounted fan in Example 1;

[0087] Figure 4 This is a horizontal sectional view of the main unit of the dual-air-duct dual-cooling system with rear-mounted fan in Example 1;

[0088] Figure 5 This is a longitudinal vertical cross-sectional view of the airflow of the main unit of the fan-mounted dual-duct dual-cooling system in Example 1.

[0089] Figure 6 This is a three-dimensional structural diagram of a finned tube heat exchanger assembly.

[0090] Figure 7 A horizontal cross-sectional view of the air conditioner unit during operation, showing how the "fin planer" at the fin gap inlet intercepts the incoming airflow, performs a stepped planing to reflect and slow it down, and then flows into the fin gap to complete heat exchange with the fins before being discharged from the fin gap.

[0091] Figure 8 This is a schematic diagram of the integrated main unit of the fan-mounted dual-duct dual-cooling system in Example 1;

[0092] Figure 9 This is a horizontal sectional view of the main unit of the dual-air-duct dual-refrigeration system with a fan arranged on the side of the compressor cavity in Example 2.

[0093] Figure 10 This is a horizontal sectional view of the main unit of the dual-duct dual-refrigeration system with a fan rear-mounted in Example 3, which uses a sawtooth-shaped finned tube heat exchanger assembly.

[0094] Figure 11 This is a top view of the airflow of the main unit of the dual-duct dual-refrigeration system with a fan rear-mounted dual-airflow system using a sawtooth-shaped finned tube heat exchanger assembly in Example 3.

[0095] Figure 12 This is a vertical sectional view of the airflow operation on the equipment platform of the integrated unit of the dual-duct dual-cooling system and the fan rear-mounted unit in Example 4.

[0096] Figure 13 A vertical sectional view of the airflow operation of the equipment platform with the low-position strip air outlet of the main unit embedded in the louver opening structure of the exterior facade;

[0097] Figure 14 A top view of the structure of the integrated unit where the exhaust airflow from the rear fan wall is laterally diffused and laterally projected onto the main unit;

[0098] Figure 15 A top view of the airflow operation of the fusion unit, which is a lateral drift of the exhaust airflow from the rear fan wall to the main unit;

[0099] Figure 16Top view of the airflow operation of the equipment platform for the fusion of the rear-mounted fan wall-side exhaust airflow and the main unit;

[0100] Figure 17 A schematic diagram showing the distribution of the air inlet and exhaust surfaces on the exterior of the equipment platform during summer operation of the integrated unit with the rear-mounted fan wall side exhaust airflow drifting laterally.

[0101] Figure 18 A schematic diagram showing the vertical airflow of the building converging and moving upward during summer operation, with the installation of a side exhaust fan unit on the equipment platform. Detailed Implementation

[0102] 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.

[0103] 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.

[0104] 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 drawings. They are only for the convenience of describing this utility model 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 utility model.

[0105] Definition: The direction perpendicular to the exterior facade of the external corridor-type equipment platform is defined as longitudinal, and the direction parallel to the exterior facade of the external corridor-type equipment platform is defined as transverse.

[0106] Example 1

[0107] like Figures 2-8 As shown, a fan-mounted dual-duct dual-cooling system main unit is integrated.

[0108] It includes a housing 1, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber 3; the refrigerant circulation system includes an external heat exchanger 2 and a compressor 41;

[0109] Each refrigerant circulation system has an independent external heat exchanger negative pressure chamber 22, which consists of an external heat exchanger 2, a part of the shell and a back plate 21.

[0110] The two external heat exchanger negative pressure chambers are arranged vertically, that is, the external heat exchangers are arranged vertically.

[0111] The external heat exchanger 2 and the negative pressure chamber 22 of the air conditioner are located at the upper part; the external heat exchanger 2 and the negative pressure chamber 22 of the air source water heater are located at the lower part.

[0112] The back plate 21 is provided with six exhaust vents 23 for the negative pressure chambers 22 of the external heat exchangers. Each exhaust vent 23 is equipped with a fan 24, forming a fan wall. The fan 24 is located inside the exhaust chamber 3 and is a backward-inclined external rotor centrifugal fan.

[0113] Each external heat exchanger negative pressure chamber corresponds to one exhaust chamber 3, that is, the two exhaust chambers 3 are arranged vertically.

[0114] Each exhaust chamber 3 corresponds to one air outlet 31.

[0115] The negative pressure chamber 22 of the external heat exchanger of the air conditioner is provided with 4 exhaust vents 23; the negative pressure chamber 22 of the external heat exchanger of the air source water heater is provided with 2 exhaust vents 23.

[0116] The rear side of the back panel of the exhaust chamber 3 is provided with a compressor chamber 4 for housing the refrigerant circuit assembly, including the compressor 41, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0117] The gas-liquid separator, air conditioning compressor, four-way valve, heat exchanger assembly, expansion valve and refrigerant pipeline of the indoor unit of the air conditioner are connected to form the refrigerant circulation loop of the air conditioning system.

[0118] The exhaust port 23 is connected to the exhaust chamber 3, and the air outlet 31 of the exhaust chamber 3 is located on the same side as the air inlet 11 of the shell; the external heat exchanger 2 is the air inlet of the negative pressure chamber 22 of the external heat exchanger.

[0119] The air outlet 31 of the exhaust chamber 3 faces the short side of the casing.

[0120] The exhaust chamber 3 is a cavity with a unidirectional air outlet, consisting of interconnected vertical exhaust chambers and horizontal exhaust chambers; wherein, the horizontal exhaust chamber is located below the bottom plate of the negative pressure chamber 22 of the external heat exchanger.

[0121] The exhaust outlet 31 of the exhaust chamber is connected to the swooping exhaust section 33, which fits the louver structure of the equipment platform's exterior facade.

[0122] In this embodiment, the connection between the air outlet 31 of the main unit and the swooping exhaust section 33 that fits the louver structure of the equipment platform facade can be achieved by riveting or by flange connection.

[0123] A swooping exhaust section 33 is provided at the air outlet 31; several guide vanes 34 are provided inside the swooping exhaust section 33. The guide vanes 34 of the swooping exhaust section 33 are parallel to or nearly parallel to the louvers of the equipment platform.

[0124] The deflector plate 34 is used to constrain and guide the direction of the exhaust airflow and connects to the louvers on the exterior facade.

[0125] When the air conditioning unit in this embodiment is running, the exhaust airflow, which is pressurized by the centrifugal fan and sent into the exhaust chamber, is ejected at high speed (about 8m / s) from the air outlet and enters the diving exhaust section 33. Under the constraint and guidance of the multiple guide plates 34 set in the diving exhaust section 33, the exhaust airflow rays are parallel or nearly parallel to the louver slats. The louver slats have the smallest interception area and the lowest interception resistance for the exhaust airflow. The exhaust airflow passes through the louver slats on the outer facade of the equipment platform and is discharged at high speed into the external atmosphere, achieving long-range diffusion and dilution.

[0126] like Figure 6-7 As shown in the illustration, in one specific implementation, the external heat exchanger 2 in this embodiment is a horizontal cross-section V-shaped finned tube heat exchanger assembly. The horizontal cross-section V-shaped finned tube heat exchanger assembly consists of four flat-plate finned tube heat exchangers 37; or it can be composed of two continuously arranged V-shaped finned tube heat exchangers 40 with cross-sections perpendicular to the long side of the fins. Each V-shaped finned tube heat exchanger 40 consists of two flat-plate finned tube heat exchangers 37.

[0127] like Figure 7 As shown, the flat plate finned tube heat exchanger 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 the heat exchange tubes 115 pass through the finned plates 110 in a direction perpendicular to the plane of the finned plates 110.

[0128] Heat exchange tube 115 connects to lotus head gas collection tube 133 and refrigerant circuit 134.

[0129] At each V-shaped apex, the lotus-head gas collecting pipe 133 is set in a one-to-one correspondence with the V-shaped finned tube heat exchanger 40, and one set of lotus-head gas collecting pipe 133 serves to form two flat plate finned tube heat exchangers 37 in the V-shape.

[0130] The cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly is a broken line type, or more specifically, a W type, with the cross-section perpendicular to the long side of the fins.

[0131] The long side of the fins in the flat plate finned tube heat exchanger 37 is set in the vertical direction or close to the vertical direction.

[0132] The apex angle α of the V-shaped finned tube heat exchanger is 15°~110°.

[0133] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30°~90°.

[0134] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30°~60°.

[0135] like Figure 6 As shown, the horizontal cross-section V-shaped finned tube heat exchanger assembly has one side of the cross-section perpendicular to the long side of the fins as the heat exchanger air inlet side and the other side as the heat exchanger air outlet side; the air outlet side belongs to the negative pressure chamber 22 area of ​​the external heat exchanger.

[0136] The incident surface of the inlet airflow is each flat finned tube heat exchanger in the horizontal cross-section V-shaped finned tube heat exchanger assembly. The angle between the inlet airflow and the tip of each finned plate 110 on each flat finned tube heat exchanger 37 is an obtuse angle β. The obtuse angle β is 97.5° to 145°. The inlet airflow strikes the tip of each finned plate 110 at an obtuse angle β and is reflected by the fin tip plate into the fin gap and flows to the negative pressure chamber 22 of the outer heat exchanger.

[0137] The airflow rate entering each fin gap d is equal to the airflow intercepted by the vertical distance δ between the tips of the front and rear finned tube heat exchangers on the air inlet section.

[0138] δ = d • sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0139] The vertical distance δ between the tips of the front and rear finned tube heat exchangers on the air inlet section is between 0.13d and 0.7d.

[0140] In one specific implementation, the airflow velocity between the fins is 1 / 3 of the inlet velocity, corresponding to a vertex angle α of 39° and an incident obtuse angle β of 109.5° for the V-shaped finned tube heat exchanger.

[0141] like Figure 4 and 5 As shown, the air inlet 11, external heat exchanger 2, external heat exchanger negative pressure chamber 22, fan 24, exhaust chamber 3 and air outlet 31 of the host fusion body in this embodiment constitute an air inlet and outlet path with the external heat exchanger at the rear and the fan and exhaust chamber at the front.

[0142] This embodiment presents a fan-mounted dual-duct dual-refrigeration system main unit fusion, which creatively reconstructs the structure of the external heat exchanger, the external heat exchanger air duct structure, and the air conditioning main unit structure of a household air conditioning main unit, creating conditions for the integration of the air conditioning main unit and the equipment platform.

[0143] ① Innovative structural design of air conditioning unit

[0144] Compared to classic household air conditioner main units, the core features of the main unit fusion in this embodiment are: it has two sets of refrigerant circulation systems set in the casing, adopts a horizontal cross-section V-shaped finned tube heat exchanger assembly with an ultra-large heat exchange area, places the horizontal cross-section V-shaped finned tube heat exchanger assembly at the front in the overall structure, and places the fan wall, exhaust cavity at the rear and air outlet at the front.

[0145] like Figure 6-7 As shown, the horizontal cross-section V-shaped finned tube heat exchanger assembly of this embodiment includes a W-shaped structure composed of four flat plate finned tube heat exchangers; or a W-shaped structure composed of a V-shaped finned tube heat exchanger formed by bending two flat plate finned tube heat exchangers; or a W-shaped structure composed of a flat plate finned tube heat exchanger and a V-shaped finned tube heat exchanger formed by bending flat plate finned tube heat exchangers; the cross-section of the finned tube external heat exchanger perpendicular to the long side of the fin is a broken line type.

[0146] In this embodiment, within the limited space of the main unit, at least one horizontal cross-section V-shaped finned tube heat exchanger assembly is installed vertically and horizontally, parallel to the air inlet surface of the air conditioning unit. A large external heat exchanger ventilation surface is obtained by unfolding the finned tube heat exchanger along its air inlet surface. Further unfolding on this large external heat exchanger ventilation surface creates a huge finned heat transfer surface, thereby effectively increasing the total heat transfer area S of the external heat exchanger, reducing the heat transfer temperature difference Δt of the external heat exchanger body, increasing evaporation pressure and reducing condensation pressure, and improving the cooling capacity Q and COP of the refrigeration and air conditioning system.

[0147] like Figure 4-5 As shown, this embodiment sets up the air inlet of the external heat exchanger of the two sets of refrigerant circulation systems, namely the air conditioner unit and the water heater unit, the external heat exchanger assembly, the fan wall, the exhaust cavity, and the exhaust cavity outlet, forming two independent external heat exchanger air paths.

[0148] In this embodiment, two external heat exchanger negative pressure chambers 22 are arranged vertically. Each external heat exchanger negative pressure chamber 22 is composed of a bottom plate, a side plate 25, a back plate 21, an external heat exchanger 2, and a top plate (i.e., the top plate of the shell 1). The bottom plate of the upper external heat exchanger negative pressure chamber 22 and the top plate of the lower external heat exchanger negative pressure chamber 22 are combined into one and share the same partition.

[0149] The back plate 21 is arranged with a horizontally continuous V-shaped finned tube heat exchanger assembly. The back plate 21 is provided with an exhaust port 23 for the negative pressure chamber of the external heat exchanger. The exhaust port 23 for the negative pressure chamber of the external heat exchanger corresponds to the air intake of the backward-inclined external rotor centrifugal fan. The air intake of the backward-inclined external rotor centrifugal fan faces the external heat exchanger 2.

[0150] The horizontally arranged V-shaped finned tube heat exchanger assembly serves as the air inlet for the negative pressure chamber 22 of the external heat exchanger. A centrifugal fan exhaust chamber 3 is installed on the outside of each backplate 21, with the outlet 31 of the exhaust chamber 3 having an area of ​​15-60% of the air inlet area of ​​the negative pressure chamber 22 of the external heat exchanger.

[0151] In this embodiment, a compressor chamber 4 is provided on the rear side of the back plate of the exhaust chamber 3, and two sets of refrigerant circulation system compressors 41, four-way valves, expansion valves and other fluorine circuit components and electrical boxes are installed in the housing.

[0152] ② Innovative design of the main unit's integrated external heat exchanger inlet and outlet airflow field

[0153] This embodiment is a fan-mounted dual-duct dual-cooling system main unit fusion body. The air inlet 11, the negative pressure chamber 22 of the external heat exchanger, the exhaust chamber 3 and the air outlet 31 of the exhaust chamber constitute the air inlet and outlet path with the external heat exchanger in front and the fan and exhaust chamber behind. It constructs an external heat exchanger air inlet and outlet field with short path, low resistance, large air volume and high heat exchange intensity.

[0154] like Figure 8 and 9 As shown, during the ventilation and heat exchange operation of each external heat exchanger in this embodiment, the airflow from the air inlet 11 to the air outlet 31 is powered by a centrifugal fan, and the heat exchange airflow undergoes two static pressure-dynamic pressure conversions. The first static pressure-dynamic pressure conversion enables the high-speed intake of airflow from the centrifugal fan's suction port, and the second static pressure-dynamic pressure conversion enables the high-speed discharge of airflow from the exhaust port 31 of the exhaust chamber. Furthermore, the airflow lines in and out of the fin gaps of the heat exchanger in this embodiment are zigzag airflow lines with two bends, located in a plane perpendicular to the long side of the fins, rather than in a plane parallel to the fins. These two points are the most essential motion characteristics of the overall ventilation and heat exchange process of the two external heat exchangers in this embodiment.

[0155] In this embodiment, each external heat exchanger establishes an inlet and outlet airflow field through the operation of multiple centrifugal fans on the corresponding fan wall: six centrifugal fans on the fan wall draw air from the negative pressure chamber of the external heat exchanger to generate negative pressure inside the chamber, pulling ambient air at 0 Pa static pressure (gauge pressure) into the main unit's integrated body at a medium speed (about 4 m / s) through the air inlet. The airflow is dispersed and slowed down by the stepped planing of the main body by multiple fin planers, and flows through the fin gaps of the external heat exchanger at a low speed (below 2 m / s) to complete heat exchange. Afterwards, it enters the negative pressure chamber of the external heat exchanger and is then collected and added. The airflow flows at high speed into the centrifugal fan intake, where the pressure is lowest (gauge pressure is negative), completing the first static-dynamic pressure conversion. The high-speed airflow into the centrifugal fan intake is pressurized by the fan and sent into the exhaust chamber, which has a positive pressure relative to the atmospheric environment. Under the positive pressure of the exhaust chamber, it is injected into the atmospheric environment at high speed (about 8m / s) from the exhaust chamber outlet for diffusion and dilution. In this embodiment, the heat exchange airflow from the main unit inlet to the exhaust outlet, powered by the centrifugal fan, undergoes two static-dynamic pressure conversions to achieve high-speed intake of the centrifugal fan and high-speed exhaust from the exhaust chamber.

[0156] In this embodiment, the microscopic process of airflow entering and exiting the fin gaps and flowing at low speed within the fin gaps during the operation of the air conditioning unit is a crucial aspect of the external heat exchanger's airflow field.

[0157] At the airflow inlet section EE, the medium-speed airflow of about 4 m / s, flowing in from the outer facade of the equipment platform, is propelled in a uniform laminar flow to the fin gap inlet section FF. At FF, the airflow line at the inlet forms an obtuse angle with the fin behind the gap. The fin behind the gap acts as a "planer," "planing" a piece of airflow from the main airflow and inserting it into the fin gap. At FF, the main airflow "planed" out by the tip of the "fin planer" is intercepted and impacts the tip of the "planer" on the fin behind the gap at an obtuse angle. After being reflected by the fin in front of the gap, it diffuses and decelerates in the fin gap. The airflow of about 1.5 m / s, which has been decelerated by the collision and diffusion, is pulled by the negative pressure of the negative pressure chamber and overcomes the resistance of the fin gap channel to flow out of the fin channel. The low-speed airflow that reaches the fin gap outlet section GG is accelerated again to a medium-speed airflow of about 4 m / s under the negative pressure of the negative pressure chamber and converges and is discharged at the HH section.

[0158] In this embodiment, when the air conditioner unit is running, heat exchange occurs between the refrigerant inside the evaporator-condenser pipes and the airflow between the fins outside the pipes, thus achieving energy coupling.

[0159] In this embodiment, on the refrigerant side, the refrigerant is driven to circulate by a compressor, 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.

[0160] In this embodiment, a compressor chamber 4 is provided on the rear side of the back plate of the exhaust chamber 3 for housing circuit components including a compressor 41, a gas-liquid separator 42, a four-way valve 43, an expansion valve 45, an electrical box, and a power cable signal line electrical box.

[0161] In this embodiment, the main unit, the two-section finned tube heat exchanger assembly, and the two-section external heat exchanger negative pressure chamber 2 are separated by a middle partition 38 and are connected to form an independent air path. The air outlets of the two exhaust sections point directly to the gaps of the louvers on the outer facade of the equipment platform, thus constructing an airflow path structure for the external heat exchanger assembly with a short path, low resistance, large air volume, and high heat exchange intensity, respectively serving the air conditioning main unit external heat exchanger assembly and the air source water heater external heat exchanger assembly.

[0162] This embodiment achieves a large-span structural innovation in the air inlet and exhaust airflow paths of the external heat exchanger.

[0163] In this embodiment, the refrigerant is driven by the compressor 41 on the refrigerant side in a closed-loop circulation, and the refrigerant undergoes high-efficiency phase change heat transfer during the circulation process, so as to realize the energy coupling of the heat exchange process between the two external heat exchangers and the airflow in the fin gap of the main equipment.

[0164] In this embodiment, the compressor 41, four-way valve, expansion valve, gas-liquid separator and other refrigeration circuit components, as well as power cables, signal lines and electrical boxes, are installed in the compressor cavity for two sets of refrigerant circulation systems for air conditioning and air source water heater.

[0165] In this embodiment, the host fusion unit uses compressor 41 to drive a closed-loop circulation of refrigerant on the refrigerant side, and the refrigerant undergoes high-efficiency phase change heat transfer during the circulation process, so as to achieve energy coupling of the heat exchange process between the two external heat exchanger assemblies of the host fusion unit and the airflow in the fin gap.

[0166] These refrigerant circulation systems, along with components such as the external heat exchanger 2, refrigerant connecting pipes, and indoor unit heat exchangers, form air conditioning refrigeration loops and air source water heater refrigeration loops in the sequence of compressor 41-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor 41. Compressor 41 serves as the power source for the refrigeration loop, establishing high and low pressure states for the refrigerant in the condenser and evaporator pipes, driving the refrigerant to circulate and undergo repeated phase changes within the refrigeration loop to achieve "heat transfer." Specifically, the air conditioning refrigeration system absorbs heat through the evaporation of liquid refrigerant within the evaporator pipes, and then absorbs the low-pressure flow between the fins through the large finned area of ​​the copper pipes. In an air-source heat pump water heater, heat is transferred from the low-temperature environment of the evaporator to the high-temperature environment of the condenser by the condensation of high-temperature, high-pressure refrigerant gas within the condenser pipes. The heat is then released through the large fins attached to the copper pipes, which absorb heat from the ambient air flowing between the fins. Similarly, in an air-source heat pump water heater, heat is transferred from the ambient air of the evaporator to the high-temperature environment of the condenser by the condensation of high-temperature, high-pressure refrigerant gas within the water tank.

[0167] In this embodiment, the main unit can operate independently, meaning that the two refrigerant circulation systems can operate synchronously or asynchronously.

[0168] Example 2

[0169] like Figure 9 As shown, this embodiment and Embodiment 1 are both dual refrigeration system integrated host units with the external heat exchanger assembly and negative pressure chamber in the front and the centrifugal fan and exhaust chamber in the rear.

[0170] The difference in this embodiment is that the dual cooling system consists of an air conditioning system and an air source water heater system, and the compressor chamber is located on the side of the negative pressure chamber and exhaust chamber of the main unit. Because the compressor chamber is located on the side, this embodiment increases the lateral width of the main unit and reduces the longitudinal thickness, making it more suitable for residential equipment platforms with a smaller longitudinal depth.

[0171] Example 3

[0172] like Figure 10-11 As shown, this embodiment differs from Embodiment 1.

[0173] This embodiment has the same principle and structure as Embodiment 1, both being a dual refrigeration system integrated host with the external heat exchanger assembly and negative pressure chamber in the front and the centrifugal fan and exhaust chamber in the rear.

[0174] The difference in this embodiment is that,

[0175] The external heat exchanger 2 is a sawtooth-shaped zigzag finned tube heat exchanger assembly composed of three flat finned tube heat exchangers 37 and a baffle 39. Two of the flat finned tube heat exchangers 37 form a V-shaped finned tube heat exchanger 40. This V-shaped finned tube heat exchanger 40 can be formed by connecting the end plates of two flat finned tube heat exchangers, or it can be formed by bending several single-row flat finned tube heat exchangers into a V-shape and then assembling them into a composite V-shaped finned tube heat exchanger. The other flat finned tube heat exchanger 37 is independently set outside the V-shaped finned tube heat exchanger. A baffle 39 is set between the baffle 39 and the finned tube heat exchanger. The space between the baffle 39 and the finned tube heat exchanger is the exhaust chamber 3 of the finned tube heat exchanger, which is connected to the negative pressure chamber 22 of the external heat exchanger.

[0176] The angle γ between the baffle 39 and the flat finned tube heat exchanger 37 is 0.5α;

[0177] The included angle ε between the baffle 39 and the V-shaped finned tube heat exchanger 40 is 0.5α.

[0178] The serrated zigzag finned tube heat exchanger assembly has a serrated shape on the cross-section perpendicular to the long side of the fins.

[0179] The heat exchange tubes of the serrated zigzag finned tube heat exchanger assembly are parallel to the serrated edges; the finned plate assemblies of the finned tube heat exchanger are orthogonally fitted onto the copper tubes.

[0180] The serrated finned tube heat exchanger assembly, together with the upper and lower bottom plates and the left and right side plates, forms the negative pressure chamber of the external heat exchanger. The negative pressure chamber 22 of the external heat exchanger is composed of a bottom plate, side plates, back plate 21, external heat exchanger 2, and top plate (i.e., the top plate of shell 1). The bottom plate of the upper external heat exchanger negative pressure chamber 22 and the top plate of the lower external heat exchanger negative pressure chamber 22 are combined into one and share the same partition.

[0181] The heat exchange tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0182] The serrated zigzag finned tube heat exchanger assembly divides the heat exchange air duct into a front chamber and a rear chamber. The front chamber is the air inlet chamber, and the rear chamber is connected to the air intake of the ventilation unit and is the negative pressure chamber 22 of the external heat exchanger.

[0183] The heat exchange tube forms an obtuse angle with the side wall of the negative pressure chamber of the adjacent external heat exchanger.

[0184] This embodiment uses a three-finned tube heat exchanger assembly with a V+1 structure, which increases the heat exchange area compared to a single V-shaped finned tube heat exchanger, thus meeting the needs of air conditioning systems with larger cooling capacity.

[0185] Example 4

[0186] like Figure 12As shown in the figure, this embodiment is a fan-mounted dual-duct dual-cooling system main unit integrated equipment platform, defined with the vertical outer facade of the equipment platform as the longitudinal direction and the parallel outer facade as the transverse direction.

[0187] In this embodiment, the host fusion body of Embodiment 1 is installed horizontally at intervals on the equipment platform. The air inlet and exhaust outlet both face the outer facade, that is, the air intake airflow direction is set to vertical, and the air intake surface perpendicular to the air intake airflow direction is set to horizontal.

[0188] This embodiment addresses two major issues: low energy density of the air-source heat pump water heater unit and equipment platform, and excessive horizontal width occupation of the equipment platform on the building facade. It redefines and reorganizes the integrated structure of the air-source heat pump water heater unit and the external heat exchanger airflow system.

[0189] ① Adopting a high power density air-source heat pump water heater main unit

[0190] This embodiment uses the main unit fusion body described in Embodiment 1. The horizontal V-shaped finned tube heat exchanger is used as the basic unit of the two external heat exchanger assemblies of the air conditioning water heater in the main unit fusion body. Within the limited space of the main unit fusion body, the horizontal V-shaped finned tube heat exchanger is arranged horizontally. It is spread along the air inlet surface of the horizontal V-shaped finned tube heat exchanger to obtain a large area of ​​ventilation surface of the heat exchanger assembly. It is then spread again on the large area of ​​ventilation surface of the heat exchanger assembly to obtain a huge area of ​​fin heat transfer surface. This effectively expands the total heat transfer area of ​​the fins of the two external heat exchanger assemblies of the main unit fusion body, reduces the heat transfer temperature difference of the heat exchanger body, increases the evaporation pressure and reduces the condensation pressure, and improves the cooling capacity and energy efficiency ratio of the refrigeration and air conditioning system, so that the external heat exchanger assembly and the main unit have the characteristics of high power density.

[0191] ②Reorganize the airflow path of the external heat exchanger assembly and utilize idle and inefficient space on the equipment platform.

[0192] In this embodiment, the main unit is horizontally adjacent to the equipment platform. The main unit incorporates the main sections of the air inlet and exhaust channels of the two external heat exchanger assemblies of the air conditioner and water heater into the main unit body. The air inlet and outlet of the main unit face the outer facade of the equipment platform. In this embodiment, the main unit directly introduces fresh air from the outer facade, which increases the cooling capacity while eliminating the traditional longitudinal and lateral air distribution ducts that bypass the front main unit to supply air to the rear air conditioning unit on the equipment platform, thus reducing the inefficient and ineffective space of the equipment platform.

[0193] In this embodiment, the main unit exhaust adopts a bottom exhaust mode, and the exhaust air from the external heat exchanger is directly discharged from the channel below the chassis of the external heat exchanger assembly to the ambient atmosphere outside the exterior facade; in this embodiment, the height of the external heat exchanger assembly is raised to the redundant space at the top of the equipment platform.

[0194] In this embodiment, the lateral spacing of the host module is significantly reduced to about 100mm. The lateral spacing only needs to meet the requirements of the host fusion body being pulled out and fed in longitudinally.

[0195] In this embodiment, a pedestrian walkway and maintenance passage are set up between the inner wall of the equipment platform and the horizontally arranged host fusion unit; above the maintenance passage, a cable tray is set up to house the copper pipes connecting the indoor and outdoor units of the air conditioning system, as well as the cable tray for the power cables and signal lines of the host fusion unit, realizing the "three-in-one" combination of pedestrian walkway, maintenance passage, and cable tray passage.

[0196] This embodiment utilizes the aforementioned structural innovation to utilize idle and inefficient space on the equipment platform.

[0197] In this embodiment, when the equipment platform is running, the two external heat exchanger negative pressure chambers of the main unit are vertically arranged with backward-inclined centrifugal fans, which draw air from the corresponding V-shaped external heat exchanger assembly negative pressure chambers, generating negative pressure in the chambers and pulling ambient air through the outer facade of the equipment platform into the interior of the main unit. After entering the interior of the main unit, the ambient air is dispersed and slowed down by the stepped planing action of the planer blades of the two external heat exchanger assemblies of the air conditioner and water heater, and flows at low speed through the gaps between the V-shaped external heat exchanger fins, realizing the heat exchange between the ambient air and the refrigerant in the copper tubes of the external heat exchanger. After heat exchange, the ambient air enters the corresponding negative pressure chamber, and is further gathered and accelerated, flowing into the fan intake with the lowest pressure. It is then pressurized by the fan and passes through the vertical exhaust chamber, the low-level exhaust chamber and the outer facade, and is injected into the ambient atmosphere at high speed for diffusion and dilution.

[0198] Example 5

[0199] like Figure 13 As shown, an equipment platform is provided, with the main unit integrated inside the outer corridor-type equipment platform. The air outlet 31 of the exhaust chamber 3 faces the outer facade of the outer corridor-type equipment platform 5. The vertical direction is defined as perpendicular to the outer facade of the equipment platform, and the horizontal direction is defined as parallel to the outer facade.

[0200] The air conditioning unit in this embodiment is similar to that in Embodiment 1, both employing a physical structure with the external heat exchanger at the front and the fan and exhaust chamber at the rear. The difference between the air conditioning unit in this embodiment and that in Embodiment 1 is that…

[0201] The air outlet 31 is provided with a convex exhaust section 35 that is adapted to its shape; several guide plates 34 are provided inside the convex exhaust section 35.

[0202] The exterior louvers of the external corridor-type equipment platform 5 are equipped with matching protruding exhaust sections 35 with opening structures 36. The protruding exhaust sections 35 are embedded in the opening structures 36 of the louvers 52. When the air conditioning unit is running, the exhaust air from the outlet 31 passes through the opening structure of the louvers 52 and is directly discharged into the ambient atmosphere.

[0203] This embodiment has all the advantages of embodiment 4. Furthermore, since the frame and guide plate 34 of the protruding exhaust section 35 of the opening structure 36 embedded in the louver 52 are no longer hidden behind the louver 52, but face the external environment directly, becoming part of the visible exterior of the equipment platform, and the frame and guide plate 34 of the protruding exhaust section 35 are also decorative, the louver on the exterior of the equipment platform is given more structural and color variations, achieving a better decorative visual effect. The protruding exhaust section 35 embedded in the louver and the opening structure 36 of the louver do not need to be rigidly connected, so that the protruding exhaust section 35 is suspended in the opening structure 36 of the louver or is flexibly connected to the opening structure of the louver, so as to avoid the transmission and amplification of the noise of the air conditioning unit.

[0204] Example 6

[0205] like Figure 14-18 As shown, in this embodiment, the compressor chamber of the air conditioner air source water heater is located behind the back plate of the negative pressure chamber of the external heat exchanger. The compressor chamber is located behind the air conditioner air source water heater. The vertical strip-shaped air outlet 31 is connected to the side exhaust section 35. The side exhaust section 35 has a side guide plate group. The guide plate 34 is vertically arranged and has an angle to guide the exhaust airflow away from the air conditioner air source. That is, the guide plate group points at a small angle to the side away from the air conditioner air source.

[0206] In this embodiment, the equipment platform has louvers 52 on its exterior facade. The louvers 52 have a vertical strip opening structure that is reserved close to the side wall to accommodate the side exhaust section of the air conditioning unit. When installing the main unit fusion body, its side exhaust section is embedded into the vertical strip opening structure 36 reserved in the louvers.

[0207] In this embodiment, during equipment platform operation, the positive pressure exhaust chamber of the main unit discharges the heat-exchanged air at high speed into the lateral exhaust section. Under the constraint and guidance of the guide plate assembly in the lateral exhaust section, the exhaust airflow drifts laterally when viewed horizontally. The exhaust airflow leaves the space directly in front of the equipment platform, preventing the exhaust airflow from flowing back into the main equipment platform. It also prevents the exhaust airflow from being sucked into adjacent equipment platforms below (in winter) or above (in summer) after being discharged from this equipment platform. Vertically, the exhaust airflow from the main unit of the equipment platform on several floors of the building drifts laterally at a small angle in the horizontal plane, and then gathers vertically in the space behind the main unit. In summer, the hot airflow moves upward, and in winter, the cold airflow moves downward, leaving the vertical space of the equipment platform and diffusing and diluting away from the platform.

[0208] In traditional high-rise buildings, especially high-rise residential buildings, during winter (summer) operation of external heat exchangers ventilating the ambient atmosphere, the equipment platform's exterior facade experiences a phenomenon where small exhaust areas with positive pressure and high-speed exhaust, while large intake areas with slight negative pressure and low-speed intake of ambient air, lead to the diffusion and dilution of exhaust air in the atmosphere, with some of the diluted exhaust air flowing back to the exterior facade. This causes cold (hot) air to adhere to the equipment platform's exterior facade, resulting in performance degradation of the main unit.

[0209] In winter, the cold air discharged from the heat exchangers on each equipment platform diffuses and dilutes in front of its facade and partially flows back. From a vertical perspective, the cold air discharged from multiple equipment platforms moves downward as a whole and converges, linking end to end, forming a chain, and the more it is chained, the more it covers the facade of the equipment platform. This causes the main unit of the lower equipment platform to draw in the cold air discharged from the main unit of the upper equipment platform, which reduces the evaporation temperature, reduces the refrigerant circulation, and deteriorates the heating performance of the main unit.

[0210] In summer, the hot air discharged from the heat exchangers on each equipment platform diffuses and dilutes in front of its facade and partially flows back. From a vertical perspective, the hot air discharged from multiple equipment platforms moves upward and converges as a whole, linking end to end, forming a chain, and the more it is chained, the more it covers the facade of the equipment platform. This causes the main unit of the upper equipment platform to draw in the hot air discharged from the main unit of the lower equipment platform, raising the condensing temperature, reducing the subcooling of the condensate, and deteriorating the cooling performance of the main unit.

[0211] In this embodiment, after heat exchange in each layer of the main unit, the air is constrained and guided by the guide plate group in the lateral exhaust section, and then drifts laterally at high speed to the outer space behind the compressor cavity. The exhaust airflow is separated from the space directly in front of the equipment platform, preventing the exhaust airflow from flowing back to the equipment platform. At the same time, it also prevents the risk of the exhaust airflow being sucked into the adjacent equipment platform below (in winter) or the adjacent equipment platform above (in summer) after being discharged from the equipment platform.

[0212] 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 main unit integrating a fan-mounted dual-duct dual-cooling system, characterized in that, It includes a housing, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber; the refrigerant circulation system includes an external heat exchanger and a compressor; Each refrigerant circulation system has an independent external heat exchanger negative pressure chamber. The side of the cross section of the external heat exchanger perpendicular to the long side of the fins is the air inlet side of the heat exchanger, and the other side is the air outlet side of the heat exchanger; the air outlet side belongs to the negative pressure chamber area of ​​the external heat exchanger. The negative pressure chamber of the external heat exchanger consists of an external heat exchanger, upper and lower base plates, left and right side plates, and a back plate; the back plate is provided with a plurality of exhaust ports for the negative pressure chamber of the external heat exchanger, each exhaust port is equipped with a fan, the exhaust port is connected to the exhaust chamber, and the exhaust port of the exhaust chamber is located on the same side as the air inlet of the shell; the external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger. The external heat exchanger is a horizontal cross-section V-shaped finned tube heat exchanger assembly or a sawtooth-shaped zigzag finned tube heat exchanger assembly; the horizontal cross-section V-shaped finned tube heat exchanger assembly consists of at least two flat plate finned tube heat exchangers; or it is composed of V-shaped finned tube heat exchangers 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 fin is zigzag. 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 fin. The incident surface of the airflow is each finned tube heat exchanger, and the angle between the airflow and the tip of each fin is an obtuse angle. The airflow strikes the tip of each fin at an obtuse angle β and is reflected by the fin tip into the fin gap and flows to the negative pressure chamber of the outer heat exchanger. The obtuse angle β is 97.5° to 145°; The airflow rate entering each fin gap d is equal to the airflow intercepted by the vertical distance δ between the tips of the two finned plates on the air inlet section of the finned tube heat exchanger; δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger.

2. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The sawtooth-shaped finned tube heat exchanger assembly is a W-type heat exchanger consisting of a V-shaped finned tube heat exchanger with a cross-section perpendicular to the long side of the fins, a baffle plate, and a flat plate finned tube heat exchanger; or it is consisting of a V-shaped finned tube heat exchanger, two baffle plates, and two flat plate finned tube heat exchangers.

3. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The two external heat exchanger negative pressure chambers are arranged vertically or horizontally side by side.

4. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 3, characterized in that, Two sets of serrated zigzag finned tube heat exchanger assemblies are installed inside the shell, and both are connected to the air conditioning system compressor.

5. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 3, characterized in that, Two sets of sawtooth-shaped finned tube heat exchanger assemblies are installed inside the shell, and are respectively connected to the air conditioning system compressor and the air source water heater main compressor.

6. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The back panel is provided with at least two exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall.

7. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 6, characterized in that, The fan is a centrifugal fan.

8. The integrated host unit of the rear-mounted dual-duct dual-cooling system according to claim 7, characterized in that, The centrifugal fan is a backward-inclined external rotor centrifugal fan.

9. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 6, characterized in that, The fan is an axial flow fan.

10. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The exhaust cavity is a cavity with a unidirectional air outlet, including a vertical exhaust cavity, or composed of interconnected vertical exhaust cavities and horizontal exhaust cavities; or composed of interconnected vertical exhaust cavities and lateral exhaust cavities; wherein, the horizontal exhaust cavity is located below the bottom plate of the negative pressure cavity of the external heat exchanger or above the top plate of the negative pressure cavity of the external heat exchanger, and the lateral exhaust cavity is located on the outside of the side plate of the negative pressure cavity of the external heat exchanger.

11. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 4, characterized in that, An exhaust section is provided at the air outlet.

12. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 11, characterized in that, The exhaust section is equipped with several guide vanes; the guide vanes are arranged parallel to or nearly parallel to the louvers of the equipment platform, or the guide vanes are arranged vertically and are provided with an angle to guide the exhaust airflow away from the air conditioning unit.

13. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The rear side of the exhaust chamber's back panel is provided with a compressor chamber for installing a refrigerant circuit assembly including an air conditioning compressor, a four-way valve, an expansion valve, and an electrical box; or, A compressor chamber is provided on the outer side of the negative pressure chamber of the outer heat exchanger of the housing for installing a refrigerant circuit assembly including an air conditioning compressor, a gas-liquid separator, a four-way valve, an expansion valve, and an electrical box. The gas-liquid separator, air conditioning compressor, four-way valve, heat exchanger assembly, expansion valve, and refrigerant pipeline of the indoor unit of the air conditioner are connected to form the refrigerant circulation loop of the air conditioning system.

14. The integrated host unit of the fan-mounted dual-duct dual-cooling system according to claim 1, characterized in that, The main unit also includes an intermediate heat exchanger, with two heat exchange medium channels: a refrigerant channel for the air conditioning unit and an air conditioning water channel. 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.

15. A device platform, characterized in that, The host fusion body according to any one of claims 1 to 14 is disposed in the outer corridor-type equipment platform, and the air outlet of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

16. The device platform according to claim 15, characterized in that, An exhaust section is provided at the air outlet; the exhaust section is located adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

17. The device platform according to claim 15, characterized in that, An exhaust section is provided at the air outlet; the louvers on the exterior facade of the external corridor-type equipment platform are provided with an opening structure matching the exhaust section; the exhaust section is embedded in the opening structure of the louvers.

18. The device platform according to claim 17, characterized in that, The louver opening structure is rectangular, with its long side parallel to the bottom or side of the equipment platform.

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