A main device of double air duct double refrigeration system with orthogonal setting of air inlet face and air outlet face and equipment platform thereof

Abstract

This invention belongs to the field of new energy technology and discloses a main unit of a dual-airflow, dual-refrigeration system with orthogonally arranged air inlet and outlet surfaces. The main unit includes a housing, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber. Each set of refrigerant circulation systems has an independent external heat exchanger negative pressure chamber and an exhaust chamber. The external heat exchanger negative pressure chamber consists of an external heat exchanger, part of the housing, and a back plate. Several air outlets for the external heat exchanger negative pressure chamber are provided on the back plate, corresponding to the air inlets of vertically arranged fans. The air outlets connect to the exhaust chamber. The exhaust outlet of the exhaust chamber is located on the side plate of the housing and orthogonally arranged to the air inlet surface of the housing. This invention constructs a low-resistance external heat exchanger airflow path through the louvers of the exterior facade, constructs an external heat exchanger assembly structure, improves the energy density of the main unit, reduces the number of devices, simplifies the spatial structure, and reduces the floor space required.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, and in particular relates to a main equipment and equipment platform of a dual-air duct dual-cooling system with orthogonal arrangement of air inlet and exhaust surfaces. 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] The pursuit of visual appeal by architects, owners, and society has led to the air conditioning units on the equipment platform being concealed by louvers on the facade. The classic rear-in, front-out air conditioning unit obstructs ventilation to the outside atmosphere, resulting in a significant decrease in heat exchange performance. Medium-speed exhaust units (below 7 m / s) also obstruct ventilation to the outside atmosphere, leading to increased exhaust static pressure, decreased exhaust velocity, and reduced airflow. A significant portion of this 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 into 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 the equipment platforms of fully furnished apartments. However, in summary, classic residential central air conditioning units and air source water heaters, existing in the early stages of the dual-carbon era, 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 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 solve the above-mentioned problems in the prior art, the present invention provides a main unit with a dual-air-duct dual-cooling system in which the air inlet and exhaust surfaces are orthogonally arranged;

[0014] The dual refrigeration system described in this invention can be used for both air conditioners, or both for air source water heaters, or one system for air conditioners and the other for air source water heaters.

[0015] Another objective of this invention is to provide a device platform for a main unit equipped with a dual-airflow, dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged.

[0016] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0017] A main unit of a dual-air-duct dual-refrigeration system with orthogonal air inlet and exhaust surfaces 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;

[0018] 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.

[0019] The back plate is provided with several air outlets for the negative pressure chambers of the external heat exchanger, and the air outlets are equipped with vertically arranged fans; the external heat exchanger is the air inlet for the negative pressure chamber of the external heat exchanger.

[0020] The air outlet on the back panel corresponds to the air intake of the vertically arranged fan; the air outlet is connected to the exhaust chamber; the exhaust port of the exhaust chamber is located on the side panel of the housing and is orthogonal to the air inlet surface of the housing.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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° to 110°.

[0025] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 90°.

[0026] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 60°.

[0027] 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.

[0028] Furthermore, 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 tube heat exchanger is an obtuse angle; the obtuse angle β is 97.5°~145°. The inlet airflow impacts the tip of each finned tube heat exchanger assembly at an obtuse angle β, and is reflected by the fin tip plate into the fin gap and flows to the negative pressure chamber of the outer heat exchanger.

[0029] 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 front and rear fins of the flat plate finned tube heat exchanger in the horizontal cross-section V-shaped finned tube heat exchanger assembly on the air inlet section.

[0030] δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The copper tubes of the serrated zigzag-shaped 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.

[0035] 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.

[0036] The finned copper tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0037] 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.

[0038] Preferably, the finned copper tube forms an obtuse angle with the sidewall of the negative pressure chamber of the adjacent external heat exchanger.

[0039] Furthermore, the negative pressure chambers and exhaust chambers of the two external heat exchangers are arranged vertically or horizontally side by side, separated by a central partition. That is, the external heat exchangers are arranged vertically or horizontally side by side.

[0040] Furthermore, the back panel is provided with at least two air outlets; each air outlet 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-curved external rotor centrifugal fan.

[0041] Preferably, the back panel is provided with 4 or 6 air outlets; each air outlet is equipped with a fan, forming a fan wall.

[0042] Furthermore, an exhaust section is provided at the exhaust vent.

[0043] Furthermore, the exhaust section is provided with several guide plates; the guide plates are arranged parallel to or nearly parallel to the louvers, or the guide plates are arranged vertically and are provided with an angle to guide the exhaust airflow away from the main unit.

[0044] Furthermore, the exhaust port area of ​​the exhaust cavity is 15% to 60% of the air inlet area of ​​the negative pressure cavity of the external heat exchanger.

[0045] Furthermore, the exhaust cavity is a cavity with a unidirectional air outlet, consisting of a side plate, a top plate, a bottom plate of the shell, a back plate of the negative pressure chamber of the external heat exchanger, and an exhaust cavity back plate; the air outlet of the exhaust cavity is a vertical rectangular air outlet.

[0046] Furthermore, the exhaust surface enclosed by the exhaust port is disposed on the long side of the housing, and the air inlet surface is disposed on the short side of the housing or / and the long side adjacent to the short side.

[0047] Furthermore, a swooping exhaust section is provided at the exhaust vent; the swooping exhaust section is provided with several guide vanes.

[0048] Furthermore, a protruding exhaust section is provided at the exhaust port; several guide plates are provided inside the protruding exhaust section.

[0049] Furthermore, a compressor chamber is provided on the outer side of the exhaust cavity back plate or the outer side of the negative pressure cavity side plate of the external heat exchanger for housing the fluorine circuit assembly including the compressor, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0050] 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.

[0051] A host equipment platform, wherein the host equipment is disposed within an outer corridor-type equipment platform, and the exhaust port of the exhaust chamber faces the outer facade of the outer corridor-type equipment platform.

[0052] Furthermore, an exhaust section is provided at the exhaust vent; the exhaust section is provided adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

[0053] Furthermore, a swooping exhaust section is provided at the exhaust 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.

[0054] Furthermore, an exhaust section is provided at the exhaust vent; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with an opening structure that matches the exhaust section located in the middle or lower part of the exhaust cavity; the exhaust section in the middle or lower part of the exhaust cavity is embedded in the louver opening structure.

[0055] Furthermore, a protruding exhaust section is provided at the exhaust vent; the louvers on the exterior facade of the outer corridor equipment platform are provided with an opening structure that matches the protruding exhaust section located in the middle or lower part of the exhaust cavity; the protruding exhaust section in the middle or lower part of the exhaust cavity is embedded in the louver opening structure.

[0056] Furthermore, the opening structure of the louver is rectangular, with its long side parallel to the bottom or side of the equipment platform.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] ① Construct a low-resistance airflow path for the external heat exchanger that penetrates the louvers of the facade.

[0059] This invention features a vertical strip-shaped small-area exhaust port on the exhaust chamber panel of the external heat exchanger. The exhaust port is located near the horizontal midpoint of the vertical fan wall, equidistant from each fan. The exhaust port in front of the exhaust chamber has a large flow cross-section, short path, and low resistance as it collects the exhaust air from each fan. After the exhaust port, the exhaust airflow enters the vertical strip-shaped diving exhaust section. Under the constraint and guidance of multiple diving guide plates set in the vertical strip-shaped diving exhaust section, the exhaust airflow streamline is parallel or nearly parallel to the louvered windows on the exterior facade. The exhaust airflow passes through the louvered window assembly with low resistance and is discharged at high speed to the external atmosphere, achieving long-range diffusion and dilution.

[0060] This invention uses the exterior facade of the equipment platform as a reference plane for calculation. The exhaust port area of ​​the external heat exchanger of the main equipment is very small, significantly smaller than the air inlet area of ​​the exterior facade (less than 1 / 3). The air inlet area is large, the air inlet velocity is low, and the air inlet resistance is almost zero. The exhaust velocity is more than 3 times the average air inlet velocity, and the exhaust dynamic pressure head on the exterior facade is more than 9 times the air inlet dynamic pressure head. The exhaust airflow passes through the louvers of the exterior facade and enters the ambient atmosphere with a long range and good diffusion and dilution effect. This invention constructs a low-resistance airflow path for the entire external heat exchanger assembly that overcomes the short circuit of exhaust airflow recirculation. The thermal performance of the main equipment on the equipment platform is not reduced compared with the laboratory data. The air conditioner and air source water heater complete their tasks as "heat transporters" with high quality and high efficiency.

[0061] ② Construct an external heat exchanger assembly structure to improve the body's energy density.

[0062] This invention utilizes a chain process in the external heat exchanger's airflow path: medium-speed air intake → fin planer deceleration → heat exchange on a massive fin heat exchange area on a large ventilation surface → convergence acceleration → fan pressurization → high-speed discharge in a dive-type exhaust section. With a fan as the power source and a massive, continuously arranged horizontal cross-section V-shaped finned tube heat exchanger assembly fin planer as the core, it achieves deceleration and smooth air distribution between the fins, constructing an efficient heat exchange airflow structure inside the air conditioning and water heater main unit, thereby improving the energy density of the external heat exchanger assembly and the main unit.

[0063] The present invention features a vertically arranged fan with the air inlet facing the external heat exchanger directly. This reduces the local resistance of the airflow turning upwards before the fan inlet in traditional multi-split air conditioners. Combined with the stepped planing of the fins and the throttling effect of the fin gaps, the uniformity of ventilation and heat exchange in the external heat exchanger is improved.

[0064] 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 further improving the energy density of the main unit of the air conditioning water heater.

[0065] ③Reduce the number of equipment, simplify the spatial structure, and reduce the floor space required.

[0066] This invention combines the air conditioner unit and the air source water heater unit into one, reducing the number of devices on the equipment platform and the amount of installation work. Furthermore, the installation of the air conditioner water heater unit on the equipment platform is extremely convenient and quick. The unit can be moved and placed "close" to the louvers on the exterior facade by the downward-facing exhaust section of the external heat exchanger. "Close" rather than "contact" eliminates the need for hard or soft connections between the exhaust section and the louvers, reducing the difficulty and workload of the air conditioner unit installation and also reducing the amplification and diffusion of vibration and noise from the air conditioner unit within the louvers through hard connections.

[0067] This invention combines the air conditioner unit and the air source water heater unit into one, greatly simplifying the equipment platform and the relationships between the equipment and the spatial structure on the equipment platform's facade. This includes the interrelationships between the power circuit, signal circuit, refrigerant piping, condensate water circuit, and external heat exchanger air circuit of the air conditioner unit and the air source water heater unit, as well as their spatial structure relationship with the equipment platform and the equipment platform's facade. As a result, the equipment platform becomes simpler, and equipment operation and maintenance become more convenient.

[0068] This invention combines the air conditioner unit and the air source water heater unit into one, eliminating the need for a dedicated air supply and exhaust channel for the external heat exchanger of the air source water heater, thus reducing the footprint of the equipment platform.

[0069] ④ Achieving a perfect balance between the decorative appeal of the exterior facade and the excellent thermal performance of the air conditioning unit.

[0070] The exhaust vent of the main unit of the present invention is vertically centered on the outer surface of the main unit body and centrally located in the lower part of the outer facade of the equipment platform. When the main unit is running on the equipment platform, the louvers on the outer facade corresponding to the two sides and the upper part of the main unit constitute the air inlet area, and the louvers corresponding to the small central vertical strip air outlet area on the exhaust vent panel of the main unit constitute the exhaust area. The air inlet area and the exhaust area are separated from each other, blocking the short circuit of exhaust backflow.

[0071] The exhaust vent of this invention is a downward-facing type that fits into the louvered window assembly on the exterior of the equipment platform, ensuring smooth exhaust from the external heat exchanger. Calculated using the exterior of the equipment platform as a reference plane, the exhaust vent area of ​​the external heat exchanger is very small, significantly smaller than the air inlet area of ​​the exterior (less than 1 / 3). The exhaust velocity is more than 3 times the inlet velocity, and the exhaust dynamic pressure head on the exterior is more than 9 times the inlet dynamic pressure head. The exhaust airflow travels a long distance through the louvers into the ambient atmosphere, resulting in good diffusion and dilution effects. The thermal performance of the main equipment on the equipment platform is not reduced compared to laboratory data, and its role as a "heat transporter" is completed with high quality and efficiency.

[0072] 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 equipment, while maintaining the decorative appearance of the louver facade. It 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 equipment. Attached Figure Description

[0073] Figure 1 This is a three-dimensional sectional view of the main unit of the dual-air-duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0074] Figure 2 This is a top view of the main unit of the dual-air-duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0075] Figure 3 This is a longitudinal vertical sectional view of the main unit of the dual-air-duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0076] Figure 4 The horizontal and vertical sectional views of the main unit of the dual-air-duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1 are shown.

[0077] Figure 5 This is a longitudinal vertical sectional view of the main unit of the dual-air duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1, showing its exhaust operation.

[0078] Figure 6 This is a three-dimensional structural diagram of a horizontal cross-section V-shaped finned tube heat exchanger assembly.

[0079] 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.

[0080] Figure 8 This is a diagram showing the distribution of the air inlet and exhaust areas on the exterior facade of the equipment platform for the main unit of the dual cooling system with orthogonally arranged air inlet and exhaust outlets, as described in Example 1.

[0081] Figure 9 This is a schematic diagram of the main equipment system of the dual-air-duct dual-cooling system with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0082] Figure 10 This is a top view of the main equipment in Example 2, which uses two V-shaped finned tube heat exchangers with the air inlet and exhaust surfaces orthogonally arranged.

[0083] Figure 11 This is a diagram showing the airflow distribution of the main equipment in Example 2, where the air inlet and outlet surfaces of the dual V-shaped finned tube heat exchangers are orthogonally arranged.

[0084] Figure 12 This is a schematic diagram of the two refrigeration systems of the air source water heater unit, which uses an intermediate heat exchanger to output air conditioning water to the indoor unit in Example 3.

[0085] Figure 13 This is a top view of the main equipment structure of the sawtooth-shaped finned tube heat exchanger assembly in Example 4;

[0086] Figure 14 This is a top view of the main equipment operating airflow of the sawtooth-shaped finned tube heat exchanger assembly in Example 4;

[0087] Figure 15This is a top view of the main unit structure of Example 5, where the air inlets are located on both sides of the V-shaped tip, and the air inlet and outlet airflows are orthogonal.

[0088] Figure 16 This is a top view of the main unit's operating airflow, where the air inlets are located on both sides of the V-shaped tip, and the airflow from the intake and exhaust is orthogonal.

[0089] Figure 17 This is a vertical sectional view of the louvered opening structure of the convex exhaust section embedded in the equipment platform in Example 6.

[0090] Figure 18 This is a top view of the main unit structure of the side exhaust dual refrigeration system in Example 7;

[0091] Figure 19 This is a top view of the airflow during operation of the main unit of the lateral exhaust dual-cooling system in Example 7;

[0092] Figure 20 A schematic diagram showing the vertical airflow of the building converging and moving upwards during summer operation when a side exhaust fan is installed on the equipment platform. Detailed Implementation

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Definition: The direction perpendicular to the exterior facade of the external corridor equipment platform is defined as longitudinal, and the direction parallel to the exterior facade of the external corridor equipment platform is defined as transverse.

[0097] Example 1

[0098] like Figures 1-9 As shown, a main unit of a dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces is described.

[0099] 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;

[0100] In this embodiment, one system in the dual-cooling system is used for air conditioning, and the other system is used for air source water heater.

[0101] 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.

[0102] The two external heat exchanger negative pressure chambers are arranged vertically, that is, the external heat exchangers are arranged vertically and separated by a middle partition 38.

[0103] 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.

[0104] The back plate 21 is provided with six air outlets 23 for the negative pressure chambers 22 of the external heat exchangers. The air outlets 23 are equipped with vertically arranged fans 24, forming a fan wall. The fans 24 are located in the exhaust chamber 3 and are backward-inclined external rotor centrifugal fans.

[0105] Each external heat exchanger negative pressure chamber corresponds to one exhaust chamber 3, that is, the two exhaust chambers 3 are arranged vertically and separated by a middle partition 38.

[0106] Each exhaust chamber 3 corresponds to one exhaust port 31, and the two exhaust chambers are separated by a middle partition 38.

[0107] The negative pressure chamber 22 of the external heat exchanger of the air conditioner is provided with 4 air outlets 23; the negative pressure chamber 22 of the external heat exchanger of the air source water heater is provided with 2 air outlets 23.

[0108] The air outlet 23 on the back panel 21 corresponds to the air intake of the vertically arranged fan; the air outlet 23 is connected to the exhaust chamber 3; the exhaust port 31 of the exhaust chamber 3 is located on the side panel 13 of the housing 1 and is orthogonally arranged to the air inlet surface 12 of the housing 1.

[0109] The outer side of the exhaust cavity back plate is provided with a compressor cavity 4 for housing the fluorine circuit assembly including compressor 41, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0110] The exhaust cavity 3 is a cavity with a unidirectional exhaust port, which is composed of the side plate, top plate and bottom plate of the shell 1, the back plate of the negative pressure cavity 22 of the external heat exchanger, and the exhaust cavity back plate 46; the exhaust port 31 of the exhaust cavity 3 is a vertical rectangular exhaust port.

[0111] The exhaust surface enclosed by the exhaust port 31 is located on the long side of the housing 1, and the air inlet surface 12 is located on the short side of the housing 1.

[0112] The area of ​​the exhaust port 31 of the exhaust chamber is 15-60% of the air inlet area of ​​the negative pressure chamber 22 of the external heat exchanger.

[0113] In this embodiment, the connection between the exhaust port 31 of the main unit and the combined vertical strip-shaped swooping exhaust section 33 that fits the louver structure of the outer facade of the equipment platform can be achieved by riveting or by flange connection.

[0114] A swooping exhaust section 33 is installed at the exhaust vent 31; several guide vanes 34 are installed 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.

[0115] The deflector plate 34 is used to constrain and guide the direction of the exhaust airflow and connects to the louvers 52 on the exterior facade.

[0116] 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 small-area exhaust port 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.

[0117] like Figure 6-7As 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.

[0118] 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.

[0119] Heat exchange tube 115 connects to lotus head gas collection tube 133 and refrigerant circuit 134.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] The apex angle α of the V-shaped finned tube heat exchanger is 15° to 110°.

[0124] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 90°.

[0125] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 60°.

[0126] like Figure 7 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.

[0127] 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.

[0128] 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.

[0129] δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0130] 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.

[0131] 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.

[0132] This embodiment presents a main unit of a dual-airflow dual-cooling system with an orthogonal arrangement of the air inlet and exhaust surfaces. It creatively reconstructs the structure of the external heat exchanger, the airflow path of the external heat exchanger, and the structure of the air conditioning unit, thus creating conditions for the integration of the air conditioning unit and the equipment platform.

[0133] ① Innovative structural design of air conditioning unit

[0134] Compared to classic household air conditioning units, the technical features of this embodiment, which integrates dual refrigeration systems with orthogonally arranged air inlet and outlet surfaces and a swooping exhaust section, are:

[0135] The system employs two V-shaped finned tube external heat exchanger assemblies, each serving a different refrigeration system unit. Each finned tube external heat exchanger assembly consists of at least two flat-plate finned tube heat exchangers; or a V-shaped finned tube heat exchanger formed by bending flat-plate finned tube heat exchangers; or a combination of a flat-plate finned tube heat exchanger and the aforementioned 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 assembly perpendicular to the long side of the fins is a zigzag shape.

[0136] In this embodiment, within the limited space of the dual-cooling system main unit fusion body, parallel to the air inlet surface of the main unit fusion body, one horizontal V-shaped finned tube heat exchanger assembly is set at the top and one at the bottom. The upper external heat exchanger assembly is connected to one cooling system, and the lower external heat exchanger assembly is connected to the other cooling system.

[0137] In this embodiment, each external heat exchanger assembly unfolds along the air inlet surface of the horizontal V-shaped finned tube heat exchanger to obtain a large area of ​​external heat exchanger assembly ventilation surface. On the large area of ​​external heat exchanger assembly ventilation surface, it unfolds again to obtain a huge area of ​​fin heat transfer surface, thereby effectively increasing the total heat transfer area of ​​the fins of the external heat exchanger assembly of the air conditioning dual refrigeration system main unit, reducing the heat transfer temperature difference of the external heat exchanger body, increasing the evaporation pressure and reducing the condensation pressure, and improving the cooling capacity and energy efficiency ratio of the refrigeration system.

[0138] This embodiment is a dual-air duct dual-cooling system main unit with an orthogonal arrangement of air inlet and exhaust surfaces. It has two external heat exchanger negative pressure chambers, one above the other. Each negative pressure chamber is composed of a bottom plate, a side plate, a back plate, a finned tube external heat exchanger assembly, and a top plate. The bottom plate of the upper negative pressure chamber and the top plate of the lower negative pressure chamber are combined into one and share the same horizontal partition.

[0139] In this embodiment, each negative pressure chamber back plate is arranged with a V-shaped external heat exchanger assembly arranged horizontally; the external heat exchanger negative pressure chamber exhaust port is arranged on the vertical back plate, and a backward-inclined external rotor centrifugal fan is installed at the exhaust port; the impeller rotation surface of the vertical backward-inclined external rotor centrifugal fan is located in the vertical plane, and the air inlet faces the external heat exchanger assembly; the horizontally arranged V-shaped finned tube heat exchanger is the air inlet of the external heat exchanger negative pressure chamber;

[0140] The exhaust chamber of the centrifugal fan is set on the outside of the vertical back plate of the negative pressure chamber of the external heat exchanger. The exhaust port of the exhaust chamber is set on the side panel orthogonal to the air inlet of the main unit fusion body, and is a vertical strip exhaust port. The exhaust ports of the two exhaust chambers of the two refrigeration systems are adjacent to each other and combined into a unified vertical strip exhaust port, which is then connected to the vertical strip diving exhaust section.

[0141] This embodiment of the vertical strip-shaped swooping exhaust section includes two independent swooping exhaust sections, one above the other, which are connected to the exhaust chambers of the two refrigeration systems respectively. Each independent swooping exhaust section is equipped with several parallel guide plates. The tilt angle of the guide plates is the same as or similar to the tilt angle of the louvered windows on the exterior facade, which fits the louvered structure on the exterior facade of the equipment platform to reduce the interception area and interception resistance of the louvered windows on the exhaust airflow.

[0142] In this embodiment, a compressor chamber is set outside the exhaust cavity of the external heat exchanger assembly to house two sets of refrigeration system compressors, four-way valves, expansion valves and other refrigerant circuit components, as well as electrical boxes and other circuit components.

[0143] The essential feature of this embodiment of a dual-air-duct dual-refrigeration system main unit integrated body with orthogonal arrangement of air inlet and exhaust surfaces is that the air inlet surface, external heat exchanger assembly, negative pressure chamber, fan wall, exhaust chamber, and compressor chamber are arranged in a linear progressive manner. The air inlet surface of the main unit is perpendicular to the linear progressive shape, and the exhaust surface of the main unit exhaust chamber is parallel to the linear shape and orthogonal to the air inlet surface of the main unit.

[0144] In this embodiment, the air inlet, external heat exchanger assembly, fan wall, exhaust cavity, and exhaust port of the external heat exchanger of the two refrigerant circulation systems of the air conditioning unit and the water heater unit are arranged in a progressive layout to form two independent external heat exchanger air paths.

[0145] 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 (i.e., the bottom plate of the shell 1), 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.

[0146] The back plate 21 is continuously arranged with a horizontal cross-section V-shaped finned tube heat exchanger assembly. The back plate 21 is provided with an external heat exchanger negative pressure chamber outlet 23, which 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.

[0147] 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, and the exhaust port 31 of the exhaust chamber 3 has an area of ​​15-60% of the air inlet area of ​​the negative pressure chamber 22 of the external heat exchanger.

[0148] In this embodiment, a compressor chamber 4 is provided on the side of the air inlet 11, the external heat exchanger 2, the fan wall, the exhaust chamber 3, and the exhaust outlet 31. Two sets of refrigerant circulation system compressors 41, four-way valves, expansion valves and other refrigerant circuit components, as well as electrical boxes and other circuit components are installed in the housing.

[0149] ② Innovative design of the inlet and outlet air fields of the external heat exchanger of the main equipment

[0150] This embodiment describes a main unit of a dual-air-duct dual-cooling system with an orthogonal arrangement of the air inlet and exhaust surfaces, comprising an air inlet 11, an external heat exchanger negative pressure chamber 22, an exhaust chamber 3, and an exhaust port 31 of the exhaust chamber.

[0151] In this embodiment, during the ventilation and heat exchange operation of each external heat exchanger, the airflow from the air inlet 11 to the air outlet 31 is powered by a centrifugal fan. The heat exchange airflow undergoes two static-dynamic pressure conversions. The first static-dynamic pressure conversion enables the high-speed intake of airflow from the centrifugal fan's suction port, and the second static-dynamic pressure conversion enables the high-speed discharge of airflow from the exhaust port 31 of the exhaust chamber. Furthermore, in this embodiment, the airflow lines entering and exiting the fin gaps of the heat exchanger 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.

[0152] 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, creating negative pressure within the chamber. This draws ambient air at a static pressure (gauge pressure) of 0 Pa from the exhaust port into the main unit at a medium speed (approximately 4 m / s). The airflow is dispersed and slowed down by a multi-fin planer blade that sequentially planes the main body of the airflow. It then flows at a low speed (below 2 m / s) through the fin gaps of the external heat exchanger to complete heat exchange. Afterward, it enters the negative pressure chamber of the external heat exchanger, where it is then gathered and accelerated. 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 small rectangular exhaust port on the outer surface of the exhaust chamber for diffusion and dilution. In this embodiment, the heat exchange airflow from the main unit inlet to the 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] In this embodiment, a compressor chamber 4 is provided on the side of the negative pressure chamber 22 and the exhaust chamber 3 of the external heat exchanger 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.

[0158] In this embodiment, the main equipment, including the two-section finned tube heat exchanger assembly, the two-section external heat exchanger negative pressure chamber 2, the two-section fan wall, the two-section exhaust chamber 3, and the two-section exhaust outlets 31 and two swooping exhaust sections 33, are all separated by a middle partition 38 and are connected to form independent air paths. The exhaust outlets of the two exhaust sections point directly to the gaps in 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 external heat exchanger assembly of the air conditioning unit and the external heat exchanger assembly of the air source water heater.

[0159] This embodiment achieves a large-span structural innovation in the air inlet and exhaust airflow paths of the external heat exchanger.

[0160] 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 achieve energy coupling of the heat exchange process between the two external heat exchangers and the airflow in the fin gap of the main equipment.

[0161] 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.

[0162] In this embodiment, the main 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 to achieve energy coupling of the heat exchange process between the two external heat exchanger assemblies and the airflow between the fins of the above-mentioned air conditioner water heater main unit.

[0163] This embodiment also reshapes the air intake and exhaust area structure on the exterior of the equipment platform.

[0164] In this embodiment, the exterior facade of the equipment platform is used as the reference plane for calculation. The exhaust area corresponding to the vertical strip-shaped downward-facing exhaust port of the dual-cooling system main unit integrated with the external heat exchanger is very small, significantly smaller than the air intake area of ​​the exterior facade, less than 1 / 3 of the air intake area. However, the air intake area on the side and top of the main unit is significantly larger than the exhaust port area, characterized by a large air intake area, low air intake velocity, and near-zero air intake resistance. The exhaust velocity is more than 3 times the average air intake velocity, and the exhaust dynamic pressure head on the exterior facade is more than 9 times the air intake dynamic pressure head. The exhaust airflow passes through the louvers on the exterior facade and enters the ambient atmosphere with a long range and good diffusion and dilution effect.

[0165] In this embodiment, the air inlet and exhaust surfaces are orthogonally arranged in a dual-air duct dual-refrigeration system main unit. While implementing full-path structural innovation and full-process operation mode innovation for the external heat exchanger assembly, the refrigerant pipeline side is driven by the compressor to drive the refrigerant closed-loop circulation and high-efficiency phase change heat change during the circulation process, realizing the energy coupling of the air path and the refrigerant path.

[0166] In this embodiment, a compressor chamber is set outside the exhaust cavity of the dual refrigeration system main unit integrated with the external heat exchanger assembly. The compressor, four-way valve, expansion valve, gas-liquid separator and other refrigeration circuit components of the two refrigeration systems, as well as power cables, signal lines and electrical boxes and other circuit components are installed. These refrigeration circuit components, together with the external heat exchanger, refrigerant connection pipe, indoor unit heat exchanger and other components, form a refrigeration cycle circuit in the order of compressor-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor.

[0167] In this embodiment, the compressor 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." That is, the air conditioning refrigeration system absorbs heat by evaporating liquid refrigerant in the evaporator pipes, and then absorbs the heat from the low-temperature ambient air flowing between the fins through the large heat-absorbing area of ​​the copper tubes. Conversely, it releases heat by condensing high-temperature, high-pressure refrigerant gas 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 conditioning evaporator is located to the high-temperature environment where the condenser is located.

[0168] In this embodiment, the main equipment can operate independently, meaning that the two refrigerant circulation systems can operate synchronously or asynchronously.

[0169] Example 2

[0170] like Figure 10-11 As shown, this embodiment is based on the same principle as Embodiment 1, both of which have two external heat exchanger negative pressure chambers. Each negative pressure chamber is composed of a bottom plate, a side plate, a back plate, a finned tube external heat exchanger, and a top plate. The back plate is positioned opposite the transverse V-shaped external heat exchanger assembly, and the back plate has an exhaust port for the external heat exchanger negative pressure chamber. A backward-inclined external rotor centrifugal fan is installed at the exhaust port. The centrifugal fan's air intake faces the external heat exchanger assembly. The transversely arranged V-shaped finned tube heat exchanger is the air inlet for the negative pressure chamber. The exhaust chamber for the backward-inclined external rotor centrifugal fan of the external heat exchanger assembly is located outside the back plate of the negative pressure chamber.

[0171] The exhaust outlet of the air chamber is located on the panel of the external heat exchanger assembly of the air conditioning unit, and is a vertical strip exhaust outlet. The exhaust outlet of the air chamber is connected to the downward-facing exhaust section, which is equipped with multiple downward-facing plates to constrain and guide the exhaust airflow rays to be parallel or nearly parallel to the louver slats. The compressor chamber is located on the outside of the exhaust chamber of the external heat exchanger assembly, housing the air conditioning unit compressor four-way valve, expansion valve, electrical box, and other refrigerant circuit components.

[0172] The difference in this embodiment is that the horizontal double V-shaped finned tube external heat exchanger assembly is combined with a horizontal single backward-inclined external rotor centrifugal fan, resulting in a larger fin area for the external heat exchanger.

[0173] 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.

[0174] In this embodiment, when the main unit is running, the fan drives the entry, heat exchange, and exhaust of ambient air: the negative pressure inside the external heat exchanger assembly cavity pulls the air outside the external heat exchanger into the main unit at a medium speed. The airflow is dispersed and slowed down by planing the airflow through multiple fins. It flows at low speed through the gaps between the fins of the external heat exchanger assembly, which has a large total ventilation cross-section and a huge total fin area. Then it gathers and accelerates into the fan intake port with the lowest pressure. Finally, it is pressurized by the fan and sent into the exhaust chamber. The exhaust airflow from the rectangular exhaust port of the external heat exchanger assembly exhaust chamber enters the diving exhaust section and passes through the metal mesh or grille on the outer facade of the equipment platform to be discharged at high speed into the external atmosphere, diluting and spreading over a long distance.

[0175] In this embodiment, the fan wall is simplified, the fin area of ​​the external heat exchanger assembly is increased, and the distance between the fan wall and the external heat exchanger assembly is appropriately increased. The simplified fan wall can still ensure the uniformity of ventilation of the external heat exchanger assembly, making it suitable for dual-system residential central air conditioning systems.

[0176] Example 3

[0177] like Figure 12 As shown, the air conditioning unit in this embodiment is the same as that in embodiments 1-3.

[0178] The difference in this embodiment is that an intermediate heat exchanger 6 is provided in the compressor cavity 4 of the air conditioning unit, and the two heat exchange medium channels of the intermediate heat exchanger 6 are the refrigerant channel and the air conditioning water channel, respectively.

[0179] The refrigerant passage connects to the refrigerant circuit of the air conditioning unit; the air conditioning water passage connects to the indoor heat exchanger.

[0180] In this embodiment, the air conditioning unit produces chilled water (hot water) through the intermediate heat exchanger 6 and delivers it to the indoor unit for cooling and dehumidifying (heating) the indoor air. The intermediate heat exchanger 6 can be a plate heat exchanger, a shell-and-tube heat exchanger, a coaxial heat exchanger, or a combination thereof.

[0181] This embodiment has all the advantages of embodiments 1-3. Furthermore, by adding an intermediate heat exchanger 6 to the air conditioning unit to output air conditioning water to the indoor units inside the building, the refrigerant is isolated on the external corridor-type equipment platform, eliminating the risk of refrigerant leakage and accumulation inside the building. This creates conditions for the air conditioning unit to use environmentally friendly refrigerants such as R290, which have zero greenhouse effect and zero ozone layer depletion effect but are flammable.

[0182] Example 4

[0183] like Figure 13-14 As shown, this embodiment has the same principle and structure as Embodiment 1. The difference in this embodiment is that:

[0184] In this embodiment, both cooling systems are used for air conditioning.

[0185] The external heat exchanger 2 is a sawtooth-shaped zigzag finned tube heat exchanger assembly composed of three flat plate finned tube heat exchangers 37 and a baffle plate 39. Two of the flat plate finned tube heat exchangers 37 form a V-shaped finned tube heat exchanger 40. This V-shaped finned tube heat exchanger can be formed by connecting the end plates of two flat plate finned tube heat exchangers, or by bending several single-row flat plate finned tube heat exchangers into a V-shape and then assembling them into a composite V-shaped finned tube heat exchanger. The other flat plate finned tube heat exchanger 37 is independently set outside the V-shaped finned tube heat exchanger. A baffle plate 39 is set between the baffle plate 39 and the finned tube heat exchanger. The space between the baffle plate 39 and the finned tube heat exchanger is the exhaust chamber of the finned tube heat exchanger, which is connected to the negative pressure chamber of the external heat exchanger.

[0186] The serrated zigzag finned tube heat exchanger assembly has a serrated shape on the cross-section perpendicular to the long side of the fins.

[0187] The copper tubes of the serrated zigzag-shaped 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.

[0188] 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.

[0189] The finned copper tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0190] 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.

[0191] The finned copper tubes form an obtuse angle with the side wall of the negative pressure chamber of the adjacent external heat exchanger.

[0192] 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.

[0193] Example 5

[0194] like Figure 15-16 As shown, this embodiment has the same principle and structure as Embodiment 1 / 2, and sets up two independent air ducts for the air conditioning unit and the air source water heater unit, and two sets of refrigeration systems. The finned tube heat exchanger assembly, the negative pressure chamber of the external heat exchanger, the fan wall, and the exhaust chamber of each refrigeration system are arranged in a progressive manner.

[0195] The difference in this embodiment is that the air inlet end face perpendicular to the straight profile is closed, and instead the air inlet is opened on both sides of the tip of the V-shaped finned tube.

[0196] In this embodiment, when the air conditioning unit or air source water heater unit is running, the fan drives ambient air to enter, exchange heat, and exit along a set path:

[0197] The negative pressure inside the negative pressure chamber of the external heat exchanger draws air from the outside of the heat exchanger into the main unit at medium speed through the air inlets on both sides of the V-shaped finned tube tip. The airflow is dispersed and slowed down by the step-by-step planing of the main airflow by multiple fin planers. The airflow flows at low speed through the gaps between the fins of the external heat exchanger assembly, which has a large total ventilation cross-section and a huge total fin area. It then converges and accelerates into the fan intake port with the lowest pressure, and is finally pressurized by the fan and sent into the exhaust chamber. The air is then discharged at high speed from the small rectangular exhaust port of the external heat exchanger assembly to the external atmosphere, achieving long-range diffusion and dilution.

[0198] In this embodiment, the air inlet is located on both sides of the tip of the V-shaped finned tube heat exchanger assembly. The tip of the heat exchanger assembly is closed, allowing the air conditioning unit to be installed close to the gable wall (the longitudinal partition wall perpendicular to the exterior facade) on the equipment platform. This is suitable for dual-system residential central air conditioning systems or residential central air conditioning plus central hot water systems.

[0199] Example 6

[0200] like Figure 17 As shown, a host equipment platform is provided, with the host equipment located inside the outer corridor-type equipment platform, and the exhaust port 31 of the exhaust chamber 3 facing the outer facade of the outer corridor-type equipment platform 5.

[0201] The air conditioning unit in this embodiment is similar to that in embodiment 1. The difference between the air conditioning unit in this embodiment and that in embodiment 4 is that...

[0202] The exhaust vent 31 is provided with a vertically shaped rectangular outwardly convex exhaust section 35 that matches its shape; several guide plates 34 are provided inside the outwardly convex exhaust section 35.

[0203] The exterior louvers of the external corridor-type equipment platform 5 are equipped with opening structures 36 that match the protruding exhaust section 35. The protruding exhaust section 35 is embedded in the opening structure 36 of the louver 52. When the air conditioning unit is running, the exhaust air from the exhaust vent 31 passes through the opening structure of the louver 52 and is directly discharged into the ambient atmosphere.

[0204] 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. Example

[0205] like Figure 18-20 As shown, in this embodiment, the compressor chamber of the main unit is located outside the negative pressure chamber of the external heat exchanger, that is, the compressor chamber is side-mounted. Its vertical strip-shaped exhaust port 31 is connected to the lateral convex exhaust section 35. The lateral convex exhaust section 35 has a lateral guide plate group. The guide plate 34 is vertically arranged and has an angle to guide the exhaust airflow away from the air conditioning unit, that is, the guide plate group points at a small angle to the end facing away from the air inlet of the main unit.

[0206] The equipment platform in this embodiment 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, 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 platforms 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 compressor cavity. 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) seasons, when the external heat exchanger is ventilating to 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 equipment.

[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 equipment of the lower equipment platform to draw in the cold air discharged from the main equipment of the upper equipment platform, which reduces the evaporation temperature, reduces the refrigerant circulation, and deteriorates the heating performance of the main equipment.

[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 equipment of the upper equipment platform to draw in the hot air discharged from the main equipment of the lower equipment platform, raising the condensing temperature, reducing the subcooling of the condensate, and deteriorating the cooling performance of the main equipment.

[0211] In this embodiment, after heat exchange, the air from each layer of the main equipment 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 of a dual-air-duct dual-cooling system with orthogonally arranged air inlet and exhaust surfaces, characterized in that, It includes a housing, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber; each refrigerant circulation system includes an external heat exchanger and a compressor; each set of refrigerant circulation systems has an independent external heat exchanger negative pressure chamber and an exhaust chamber. The external heat exchanger is a horizontal cross-section V-shaped finned tube heat exchanger assembly or a serrated 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 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; it is provided with two external heat exchanger negative pressure chambers, each of which is composed of a bottom plate, a side plate, a back plate, an external finned tube heat exchanger assembly, and a top plate; The sawtooth-shaped zigzag finned tube heat exchanger assembly is composed of one or both of the following: 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 pattern on the cross-section perpendicular to the long side of the fins; the sawtooth-shaped zigzag 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 finned tube heat exchanger assembly has one side of the cross-section perpendicular to the long side of the fins as the air inlet side and the other side as the air outlet side; the air outlet side belongs to the negative pressure chamber area of ​​the external heat exchanger. The back plate is provided with several air outlets for the negative pressure chambers of the external heat exchanger, and the air outlets are equipped with vertically arranged fans; the external heat exchanger is the air inlet for the negative pressure chamber of the external heat exchanger. The air outlet on the back panel corresponds to the air inlet of the vertically arranged fan; the air outlet is connected to the exhaust chamber; the exhaust outlet of the exhaust chamber is located on the side panel of the housing and is orthogonal to the air inlet surface of the housing. The incident surface of the incoming airflow is each finned tube heat exchanger in the external heat exchanger, and the angle between the incoming airflow and the tip of each finned tube heat exchanger is an obtuse angle. The incoming airflow strikes the tip of each finned tube heat exchanger at an obtuse angle β, and is reflected by the fin tip into the fin gap and flows into the negative pressure chamber of the external heat exchanger. The obtuse angle β is 97.5° to 145°. The airflow rate entering each fin gap d is equal to the incoming airflow intercepted by the vertical distance δ between the tips of the front and rear finned tube heat exchangers on the air inlet section. δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger.

2. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The negative pressure chamber and exhaust chamber of the two external heat exchangers are arranged vertically or horizontally side by side, and are separated by a middle partition.

3. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The back panel is provided with at least two air outlets; each air outlet is equipped with a fan, forming a fan wall.

4. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 3, characterized in that, The fan is a centrifugal fan.

5. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 4, characterized in that, The centrifugal fan is a backward-inclined external rotor centrifugal fan.

6. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 3, characterized in that, The fan is an axial flow fan.

7. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The exhaust port area of ​​the exhaust chamber is 15% to 60% of the air inlet area of ​​the negative pressure chamber of the external heat exchanger.

8. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The exhaust cavity is a cavity with a unidirectional exhaust port, consisting of a side plate, a top plate and a bottom plate of the shell, a back plate of the negative pressure chamber of the external heat exchanger, and an exhaust cavity back plate; the exhaust port of the exhaust cavity is a vertical rectangular exhaust port.

9. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The exhaust surface enclosed by the exhaust port is located on the long side of the housing, and the air inlet surface is located on the short side of the housing or / and the long side adjacent to the short side.

10. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, An exhaust section is installed at the exhaust vent.

11. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 10, characterized in that, The exhaust section is equipped with several air guide plates for exhaust outlets; the air guide plates are arranged parallel to the louvers, or the air guide plates are arranged vertically and are provided with an angle to guide the exhaust airflow away from the main unit.

12. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The outer side of the exhaust cavity back plate or the outer side of the negative pressure cavity side plate of the external heat exchanger is provided with a compressor cavity for housing the fluorine circuit assembly, including the compressor, gas-liquid separator, four-way valve, expansion valve and electrical box.

13. The main equipment of the dual-air-duct dual-cooling system with orthogonal air inlet and exhaust surfaces as described in claim 1, characterized in that, The main unit is also equipped with an intermediate heat exchanger, the two heat exchange medium channels of which 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.

14. A host device platform, characterized in that, The host equipment according to any one of claims 1 to 13 is disposed in the outer corridor-type equipment platform, and the exhaust port of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

15. The host device platform according to claim 14, characterized in that, An exhaust section is provided at the exhaust vent; the exhaust section is provided adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

16. The host device platform according to claim 14, characterized in that, An exhaust section is provided at the exhaust vent; the louvers on the exterior facade of the external corridor equipment platform are provided with an opening structure that matches the exhaust section located in the middle or lower part of the exhaust cavity; the exhaust section in the middle or lower part of the exhaust cavity is embedded in the louver opening structure.

17. The host device platform according to claim 14, characterized in that, The louver opening is rectangular, with its long side parallel to the bottom or side of the equipment platform.

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