Air conditioner main unit with air inlet face and air outlet face arranged orthogonally and equipment platform thereof

Abstract

This invention belongs to the field of new energy technology and discloses an air conditioning unit and its equipment platform with the air inlet and exhaust surfaces orthogonally arranged. The air conditioning unit includes a shell, an external heat exchanger, a compressor, and an exhaust cavity; the negative pressure cavity of the external heat exchanger is composed of the external heat exchanger, part of the shell, and a back plate; the back plate is provided with several air outlets of the negative pressure cavity of the external heat exchanger, and the air outlets are equipped with vertically arranged fans; the external heat exchanger is located on the air inlet surface of the shell, and the external heat exchanger is the air inlet of the negative pressure cavity of the external heat exchanger; the air outlets on the back plate correspond to the air intakes of the vertically arranged fans; the air outlets are connected to the exhaust cavity; the exhaust port of the exhaust cavity is located on the side plate of the shell and is orthogonally arranged to the air inlet surface of the shell. This invention constructs a low-resistance external heat exchanger air path that penetrates the louvers of the exterior facade, constructs an external heat exchanger assembly structure, improves the energy density of the main body, reduces the number of devices, simplifies the spatial structure relationship, and reduces the footprint.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, and in particular relates to an air conditioning unit and its equipment platform with the air inlet and exhaust surfaces orthogonally arranged. 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 the facade's louvers. 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, 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 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 problems in the prior art, this invention provides an air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged.

[0014] The air conditioning unit described in this invention can be used in air conditioners or in air source water heaters.

[0015] Another objective of this invention is to provide a device platform for assembling an air conditioning unit with its 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] An air conditioning unit with an orthogonally arranged air inlet and exhaust surfaces includes a housing, an external heat exchanger, a compressor, and an exhaust chamber; the negative pressure chamber of the external heat exchanger is composed of an external heat exchanger, part of the housing, and a back plate; the back plate is provided with a plurality of air outlets of the negative pressure chamber of the external heat exchanger, and the air outlets are equipped with vertically arranged fans;

[0018] The external heat exchanger is disposed on the air inlet side of the shell, and the external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger;

[0019] 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.

[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 a flat plate finned tube heat exchanger; or it is composed of a flat plate finned tube heat exchanger and the V-shaped finned tube heat exchanger formed by bending a flat plate finned tube heat exchanger; 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-shaped.

[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 finned tube heat exchanger in the horizontal cross-section V-shaped finned tube heat exchanger assembly, and the angle between the inlet airflow and the tip of each finned plate on each flat 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 plate in the horizontal cross-section V-shaped 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.

[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 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.

[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] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Preferably, the finned copper tube forms an obtuse angle with the sidewall of the negative pressure chamber of the adjacent external heat exchanger.

[0038] 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.

[0039] Preferably, the back panel is provided with 4 or 6 air outlets; each air outlet is equipped with a fan, forming a fan wall.

[0040] Furthermore, an exhaust section is provided at the exhaust vent.

[0041] 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.

[0042] Furthermore, the exhaust port area of ​​the exhaust cavity is 15-60% of the air inlet area of ​​the negative pressure cavity of the external heat exchanger.

[0043] Furthermore, the exhaust cavity is a cavity with a unidirectional air outlet, which is composed 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 air outlet of the exhaust cavity is a vertical rectangular air outlet.

[0044] 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.

[0045] Furthermore, a swooping exhaust section is provided at the exhaust vent; the swooping exhaust section is provided with several guide vanes.

[0046] Furthermore, a protruding exhaust section is provided at the exhaust port; several guide plates are provided inside the protruding exhaust section.

[0047] 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.

[0048] 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.

[0049] An air conditioning unit platform, wherein the air conditioning unit is installed inside an outer corridor-type equipment platform, and the exhaust port of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Furthermore, the opening structure of the louver is rectangular, with its long side parallel to the bottom or side of the equipment platform.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] ① Construct a low-resistance airflow path for the external heat exchanger that penetrates the louvers of the facade.

[0057] 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.

[0058] This invention uses the exterior facade of the equipment platform as the reference plane for calculation. The exhaust port area of ​​the external heat exchanger of the air conditioning unit is very small, significantly smaller than the air intake area of ​​the exterior facade (less than 1 / 3). The air intake area is large, the air intake velocity is low, and the air intake resistance is almost zero. 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 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 air conditioning unit 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.

[0059] ② Construct an external heat exchanger assembly structure to improve the body's energy density.

[0060] 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 number of continuously arranged horizontal cross-section V-shaped finned tube heat exchanger assembly fin planers as the core, it completes the deceleration and air distribution of the fin gaps, achieving high efficiency and smoothness. This constructs an efficient heat exchange airflow path structure inside the air conditioning unit, improving the energy density of the external heat exchanger assembly and the air conditioning unit.

[0061] 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.

[0062] 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 air conditioning unit itself.

[0063] ③Reduce the number of equipment, simplify the spatial structure, and reduce the floor space required.

[0064] 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 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 in the louvers through hard connections.

[0065] 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.

[0066] 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.

[0067] ④ Achieving a perfect balance between the decorative appeal of the exterior facade and the excellent thermal performance of the air conditioning unit.

[0068] The exhaust vent of the air conditioning unit of this invention is vertically centered on the outer surface of the air conditioning unit and in the lower middle part of the outer facade of the equipment platform. When the air conditioning unit is running on the equipment platform, the louvers on the outer facade corresponding to the two sides and the upper part of the air conditioning unit constitute the air intake area, and the louvers corresponding to the vertical strip air outlet area of ​​the air conditioning unit constitute the exhaust area. The air intake area and the exhaust area are separated from each other, blocking the short circuit of exhaust backflow.

[0069] 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 air conditioning unit on the equipment platform is not reduced compared to laboratory data, thus fulfilling its role as a "heat transporter" with high quality and efficiency.

[0070] 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 air conditioning unit, 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 air conditioning unit. Attached Figure Description

[0071] Figure 1 This is a three-dimensional sectional view of the air conditioning unit with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0072] Figure 2 This is a top view of the air conditioning unit in Embodiment 1, where the air inlet and exhaust surfaces are orthogonally arranged.

[0073] Figure 3 This is a top view of the airflow operation of the air conditioning unit with the air inlet and exhaust surfaces orthogonally arranged in Example 1;

[0074] Figure 4 This is a longitudinal vertical sectional view of the air conditioning unit in Example 1, where the air inlet and exhaust surfaces are orthogonally arranged.

[0075] Figure 5 This is a schematic diagram of the air conditioning unit system with the air inlet and exhaust surfaces orthogonally arranged in Example 1.

[0076] Figure 6 A three-dimensional structural diagram of a horizontal cross-section V-shaped finned tube heat exchanger assembly;

[0077] 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.

[0078] Figure 8 The exhaust chamber of Example 1 has a downward-facing exhaust section. The air conditioning unit is located on the equipment platform facing the louvers and is in operation for exhausting air.

[0079] Figure 9This is a diagram showing the distribution of the air inlet and exhaust areas of the air conditioning unit on the exterior of the equipment platform in Example 1, which features an orthogonally arranged air inlet and exhaust outlet and a downward-facing exhaust section.

[0080] Figure 10 This is a top view of the air conditioning unit in Example 2, where the air inlet and exhaust surfaces of a single V-shaped finned tube heat exchanger are orthogonally arranged.

[0081] Figure 11 This is a diagram showing the airflow distribution of the air conditioning unit in Example 2, where the air inlet and outlet surfaces of a single V-shaped finned tube heat exchanger are orthogonally arranged.

[0082] Figure 12 This is a schematic diagram of the air conditioning unit system in Example 3, which uses an intermediate heat exchanger to output air conditioning water to the indoor unit.

[0083] Figure 13 This is a top view of the air conditioning unit structure of the sawtooth-shaped finned tube heat exchanger assembly in Example 4;

[0084] Figure 14 This is a top view of the air conditioning unit's airflow during operation of the serrated zigzag finned tube heat exchanger assembly in Example 4.

[0085] Figure 15 This is a top view of the air conditioning unit structure of Example 5, in which the air inlet is located on both sides of the V-shaped tip, and the air inlet and exhaust airflows are orthogonal.

[0086] Figure 16 This is a top view of the airflow of the air conditioning unit in Example 5, where the air inlets are set on both sides of the V-shaped tip, and the airflow of the intake and exhaust air are orthogonal.

[0087] Figure 17 This is a top view of the air conditioning unit of Example 6, which uses two fans and two V-shaped finned tube heat exchangers.

[0088] Figure 18 This is a top view of the airflow during operation of the air conditioning unit using dual fans and dual V-shaped finned tube heat exchangers in Example 6.

[0089] Figure 19 This is a vertical sectional view of the louvered opening structure of the convex exhaust section embedded in the equipment platform in Embodiment 7.

[0090] Figure 20 This is a top view of the air conditioning unit structure of the side exhaust dual-cooling system in Example 8;

[0091] Figure 21 This is a top view of the airflow during operation of the air conditioning unit of the side exhaust dual-cooling system in Example 8;

[0092] Figure 22 This is a top view of the airflow operation of the side exhaust air conditioning unit platform in Example 8;

[0093] Figure 23 A schematic diagram showing the vertical airflow of the building converging and moving upwards during summer operation when a side exhaust air conditioning unit is installed on the equipment platform. Detailed Implementation

[0094] 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.

[0095] 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.

[0096] In the description of this invention, it should be understood that the terms "lateral", "longitudinal", "length", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0097] 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.

[0098] Example 1

[0099] like Figures 1-9 As shown, an air conditioning unit with its air inlet and exhaust surfaces arranged orthogonally is described.

[0100] It includes a housing 1, an external heat exchanger 2, a compressor 41, and an exhaust chamber 3;

[0101] The air conditioning unit in this embodiment can be used for air conditioners or air source water heaters.

[0102] The negative pressure chamber 22 of the external heat exchanger consists of the external heat exchanger 2, part of the shell and the back plate 21.

[0103] The back plate 21 is provided with four 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.

[0104] 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.

[0105] The outer side of the exhaust cavity back plate 46 is provided with a compressor cavity 4 for housing the refrigerant circuit assembly including the compressor 41, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] In this embodiment, the connection between the air outlet 31 of the air conditioning unit and the combined vertical strip-shaped downward-sloping exhaust section 33 that fits the louver structure of the equipment platform facade can be achieved by riveting or by flange connection.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] As 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 is a W-shaped structure composed of four flat plate finned tube heat exchangers 37; or a W-shaped structure composed of two continuously arranged V-shaped finned tube heat exchangers 40 with cross-sections perpendicular to the long side of the fins. The V-shaped finned tube heat exchanger 40 is composed of two flat plate finned tube heat exchangers 37.

[0114] Alternatively, it can be composed of a flat-plate finned tube heat exchanger and a V-shaped finned tube heat exchanger formed by bending a flat-plate finned tube heat exchanger, forming a W-shaped structure; the cross-section of the finned tube external heat exchanger perpendicular to the long side of the fin is a broken line type.

[0115] 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.

[0116] Heat exchange tube 115 connects to lotus head gas collection tube 133 and refrigerant circuit 134.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] The apex angle α of the V-shaped finned tube heat exchanger is 15°~110°.

[0121] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30°~90°.

[0122] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30°~60°.

[0123] 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 air inlet side and the other side as the air outlet side; the air outlet side belongs to the negative pressure chamber 22 area of ​​the external heat exchanger.

[0124] 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.

[0125] 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.

[0126] δ = d • sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0127] 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.

[0128] 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.

[0129] This embodiment presents an air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged. It creatively reconstructs the structure of the external heat exchanger, the air duct structure of the external heat exchanger, and the structure of the air conditioning unit, thus creating conditions for the integration of the air conditioning unit with the equipment platform.

[0130] Innovative structural design of air conditioning unit

[0131] Compared to classic household air conditioning units, the technical features of this embodiment's dual-cooling system air conditioning unit, with its orthogonally arranged air inlet and outlet surfaces and a swooping exhaust section, are:

[0132] In this embodiment, the external heat exchanger is composed of 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 finned tube external heat exchanger assembly perpendicular to the long side of the fin is a broken line type.

[0133] In this embodiment, within the limited space of the dual-refrigeration system air conditioning unit, at least one horizontal V-shaped finned tube heat exchanger assembly is installed parallel to the air inlet surface of the air conditioning unit.

[0134] In this embodiment, each horizontal V-shaped finned tube 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.

[0135] The air conditioning unit of this embodiment is provided with at least one external heat exchanger negative pressure chamber, which is composed of the bottom plate, side plate, back plate, external heat exchanger and top plate of the shell.

[0136] In this embodiment, the back plate of each external heat exchanger negative pressure chamber is arranged with a horizontally cross-section V-shaped finned tube heat exchanger assembly. The air outlet of the external heat exchanger negative pressure chamber is arranged on the vertical back plate, and a backward-inclined external rotor centrifugal fan is installed at the air outlet. 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. The horizontally arranged V-shaped finned tube heat exchanger is the air inlet of the external heat exchanger negative pressure chamber.

[0137] 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 port is set on the side panel orthogonal to the air inlet of the air conditioning unit, and is a vertical strip exhaust port.

[0138] In this embodiment, a compressor chamber is set outside the exhaust chamber to house the compressor, four-way valve, expansion valve and other refrigerant circuit components, as well as electrical components such as the electrical box.

[0139] The essential feature of an air conditioning unit in this embodiment is that the air inlet surface, the external heat exchanger, the negative pressure chamber of the external heat exchanger, the fan wall, and the exhaust chamber are arranged in a progressive manner, and the exhaust surface of the exhaust chamber is orthogonal to the air inlet surface of the air conditioning unit.

[0140] In this embodiment, the negative pressure chamber 22 of the external heat exchanger 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).

[0141] The back plate 21 is arranged with a horizontal cross-section V-shaped finned tube heat exchanger assembly in a continuous manner. The back plate 21 is provided with an air outlet 23 of the negative pressure chamber of the external heat exchanger. The air outlet 23 of 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.

[0142] 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 exhaust port 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.

[0143] Innovative Design of Air Conditioning Unit External Heat Exchanger Inlet and Outlet Airflow

[0144] This embodiment describes an air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged. The unit includes an air inlet 11, an external heat exchanger negative pressure chamber 22, an exhaust chamber 3, and an exhaust outlet 31, which together form an external heat exchanger assembly with a short path, low resistance, large air volume, and high heat exchange intensity.

[0145] 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 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, 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 ventilation and heat exchange process of the external heat exchanger in this embodiment.

[0146] In this embodiment, the external heat exchanger establishes an inlet and outlet airflow field through the operation of multiple centrifugal fans on the corresponding fan wall: four centrifugal fans on the fan wall draw air from the negative pressure chamber of the external heat exchanger, creating a negative pressure inside the chamber. This draws ambient air at a static pressure (gauge pressure) of 0 Pa from the exhaust port into the air conditioning unit at a medium speed (around 4 m / s). The airflow is dispersed and slowed down by the stepped planing of the main body by multiple fin planers. The airflow then flows through the fin gaps of the external heat exchanger at a low speed (below 2 m / s) to complete heat exchange, and then enters the negative pressure chamber of the external heat exchanger, where it is collected. Accelerating, the high-speed airflow flows into the centrifugal fan intake port, which has the lowest pressure (negative gauge pressure) along the entire path, completing the first static-dynamic pressure conversion. The high-speed airflow flowing into the centrifugal fan intake port 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 port for diffusion and dilution. In this embodiment, the heat exchange airflow from the main unit intake port to the exhaust port, 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] In this embodiment, a compressor chamber 4 is provided on the outer side of the exhaust cavity back plate 46 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 power cable signal line electrical boxes. These refrigeration circuit components, together with the external heat exchanger, refrigerant connecting pipe, indoor unit heat exchanger, etc., form a refrigeration cycle circuit in the order of compressor-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor.

[0152] This embodiment achieves a large-span structural innovation in the air inlet and exhaust airflow paths of the external heat exchanger.

[0153] 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.

[0154] In this embodiment, the air conditioning 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 external heat exchanger of the air conditioning unit and the airflow between the fins.

[0155] This embodiment also reshapes the air intake and exhaust area structure on the exterior of the equipment platform.

[0156] In this embodiment, the air conditioning unit innovates the entire path structure and the entire process operation mode of the external heat exchanger assembly, while 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.

[0157] 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.

[0158] This embodiment includes a diving exhaust section air conditioning unit, which offers new advantages:

[0159] ① Achieving a perfect balance between the decorative appeal of the exterior facade and the excellent thermal performance of the air conditioning unit.

[0160] In this embodiment, the swooping air guide section between the air conditioning unit and the louvers on the exterior facade of the equipment platform eliminates the obstruction of the louvers to the exhaust of the external heat exchanger of the air conditioning unit, effectively opens the air path of the external heat exchanger, and ensures the thermal performance of the air conditioning unit, while maintaining the decorative appearance of the louver facade. This achieves a perfect unity between the decorative appearance of the equipment platform facade, the visual effect of the building facade, and the excellent thermal performance of the air conditioning unit.

[0161] ② Separate the air intake and exhaust areas on the exterior facade to prevent short-circuiting of exhaust air recirculation.

[0162] In this embodiment, the downward-facing exhaust section of the air conditioning unit is located on the outer surface of the air conditioning unit body, on the side opposite to the compressor cavity, and is eccentrically located in the lower middle part of the outer facade of the equipment platform.

[0163] In this embodiment, when the air conditioning unit is running on the equipment platform, the louvers on the exterior facade corresponding to one side and the top of the air conditioning unit constitute the air intake area, and the louvers corresponding to the vertical strip exhaust vents of the air conditioning unit constitute the exhaust area. The air intake area and the exhaust area are separated from each other, blocking the exhaust backflow short circuit.

[0164] In this embodiment, the external facade of the equipment platform is used as the reference plane for calculation. The exhaust port area of ​​the external heat exchanger of the air conditioning unit is very small, significantly smaller than the air intake area of ​​the external facade (less than 1 / 3). The exhaust velocity is more than 3 times the intake velocity. The exhaust dynamic pressure head on the external facade is more than 9 times the intake dynamic pressure head. The exhaust airflow passes through the louvers of the external facade and enters the ambient atmosphere with a long range and good diffusion and dilution effect. The thermal performance of the air conditioning unit on the equipment platform is not reduced compared with the laboratory data. The air conditioner completes its task as a "heat transporter" with high quality and high efficiency.

[0165] ③ Installation on the air conditioning unit platform is convenient and quick.

[0166] In this embodiment, a diving exhaust outlet section is set at the exhaust cavity outlet of the external heat exchanger of the air conditioning unit, which contains multiple diving plates. The diving plate group constrains and induces the exhaust airflow to be parallel or nearly parallel to the louver slats, so as to achieve "the louver slat group has the smallest interception area and the lowest interception resistance for the exhaust airflow. The exhaust airflow passes through the louver slat group on the outer facade of the equipment platform and is discharged into the external environment at high speed. The exhaust airflow has a long range and good diffusion and dilution effect in the environment."

[0167] The installation of the air conditioning unit on the equipment platform in this embodiment is extremely convenient and quick. The air conditioning unit can be moved and placed "close" to the louvers on the exterior facade by the downward-facing exhaust vent of the external heat exchanger. "Close" rather than "contact" means that there is no need to implement a hard or soft connection between the exhaust vent and the louvers, which reduces the difficulty and workload of the air conditioning unit installation and construction, and also reduces the amplification and diffusion of the air conditioning unit's vibration and noise in the louvers through hard connection.

[0168] Example 2

[0169] like Figure 10-11 As shown, this embodiment is based on the same principle as Embodiment 1, both involving at least one external heat exchanger negative pressure chamber. The external heat exchanger negative pressure chamber is composed of a bottom plate, side plates, a back plate, an external heat exchanger, and a top plate. V-shaped finned tube heat exchangers are continuously arranged laterally on the back plate, and an air outlet for the external heat exchanger negative pressure chamber is located on the back plate. A backward-inclined external rotor centrifugal fan is installed at the air outlet. The centrifugal fan's suction port faces the external heat exchanger. The laterally arranged V-shaped finned tube heat exchangers serve as the air inlet for the negative pressure chamber. An exhaust chamber for the backward-inclined external rotor centrifugal fan is located outside the back plate of the external heat exchanger negative pressure chamber, and the exhaust chamber's air outlet is located on the back plate of the external heat exchanger negative pressure chamber. A compressor chamber 4 is located outside the exhaust chamber back plate 46, housing the compressor, four-way valve, expansion valve, electrical box, and other refrigerant circuit components.

[0170] The difference in this embodiment is that,

[0171] The external heat exchanger consists of only one V-shaped finned tube heat exchanger and two or more corresponding backward-inclined external rotor centrifugal fans.

[0172] In this embodiment, when the air conditioning unit is running, the fan drives the ambient air to enter, exchange heat, and exit: the negative pressure in the negative pressure chamber of the external heat exchanger pulls the air outside the external heat exchanger into the 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 enters the diving exhaust section from the rectangular exhaust port of the exhaust chamber, passes through the metal mesh or grille on the outer facade of the equipment platform, and is discharged at high speed into the external atmosphere, diluting and spreading over a long distance.

[0173] This embodiment features a simplified fan wall, making it suitable for smaller-power residential central air conditioning unit structures.

[0174] Example 3

[0175] like Figure 12 As shown, the air conditioning unit in this embodiment is the same as that in Embodiment 1.

[0176] 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 5 are the refrigerant channel and the air conditioning water channel, respectively.

[0177] The refrigerant passage connects to the refrigerant circuit of the air conditioning unit; the air conditioning water passage connects to the indoor heat exchanger.

[0178] 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.

[0179] 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.

[0180] Example 4

[0181] like Figure 13-14 As shown, this embodiment has the same principle and structure as Embodiment 1. The difference in this embodiment is that:

[0182] 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 plate 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 can be formed by connecting the end plates of two flat finned tube heat exchangers, or 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 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.

[0183] The serrated zigzag finned tube heat exchanger assembly has a serrated shape on the cross-section perpendicular to the long side of the fins.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] The finned copper tubes form an obtuse angle with the side wall of the negative pressure chamber of the adjacent external heat exchanger.

[0189] 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.

[0190] Example 5

[0191] like Figure 15-16 As shown, this embodiment has the same principle and structure as embodiment 1 / 2. The difference in this embodiment is that the air inlet end face perpendicular to the straight line is closed or semi-closed, and the air inlet is opened on both sides of the tip of the V-shaped finned tube heat exchanger.

[0192] In this embodiment, when the air conditioning unit is running, the fan drives ambient air to enter, exchange heat, and exit along a set path:

[0193] The negative pressure inside the negative pressure chamber of the external heat exchanger draws air from the outside of the heat exchanger into the air conditioning 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 body airflow by multiple fin planers. 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 suction port with the lowest pressure. Finally, it is pressurized by the fan and sent into the exhaust chamber. It is discharged at high speed to the external atmosphere from the small rectangular exhaust port of the external heat exchanger assembly exhaust chamber, with long-range diffusion and dilution.

[0194] In this embodiment, the air inlet is located on both sides of the tip of the V-shaped finned tube heat exchanger, and the tip end face of the heat exchanger assembly is closed, so that the air conditioning unit can 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.

[0195] Example 6

[0196] like Figure 17-18 As shown, this embodiment is based on the same principle as Embodiment 1. The difference in this embodiment is that...

[0197] The external heat exchanger consists of two V-shaped finned tube heat exchangers arranged horizontally side by side, each forming an independent external heat exchanger negative pressure chamber. Each external heat exchanger negative pressure chamber corresponds to two or more backward-inclined external rotor centrifugal fans.

[0198] In this embodiment, when the air conditioning unit is running, the fan drives the ambient air to enter, exchange heat, and exit: the negative pressure in the negative pressure chamber of the external heat exchanger pulls the air outside the external heat exchanger into the 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 enters the diving exhaust section from the rectangular exhaust port of the exhaust chamber, passes through the metal mesh or grille on the outer facade of the equipment platform, and is discharged at high speed into the external atmosphere, diluting and spreading over a long distance.

[0199] In this embodiment, the fan wall is simplified, the fin area of ​​the external heat exchanger is increased, and the distance between the fan wall and the external heat exchanger is appropriately increased. The simplified fan wall can still ensure the uniformity of ventilation of the external heat exchanger, making it suitable for smaller-power residential central air conditioning systems.

[0200] Example 7

[0201] like Figure 19 As shown, an air conditioning unit platform is provided, with the air conditioning unit installed inside an outer corridor-type equipment platform, and the exhaust port 31 of the exhaust cavity 3 facing the outer facade of the outer corridor-type equipment platform 5.

[0202] The air conditioning unit in this embodiment is similar to that in Embodiment 1, except that...

[0203] 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.

[0204] 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.

[0205] This embodiment has all the advantages of embodiment 1. 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.

[0206] Example 8

[0207] like Figure 20-23 As shown, in this embodiment, the compressor chamber of the air conditioner 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 conditioner unit, that is, the guide plate group points at a small angle to the end away from the air inlet of the air conditioner unit.

[0208] 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 air conditioning unit, its side exhaust section is embedded into the vertical strip opening structure 36 reserved in the louvers.

[0209] In this embodiment, during equipment platform operation, the positive pressure exhaust chamber of the air conditioning 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 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 air conditioning units 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.

[0210] In traditional high-rise buildings, especially high-rise residential buildings, during winter (summer) 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 exterior facade of the equipment platform, resulting in the deterioration of the air conditioning unit's performance.

[0211] 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 air conditioning unit of the lower equipment platform to draw in the cold air discharged from the air conditioning unit of the upper equipment platform, which reduces the evaporation temperature, reduces the refrigerant circulation, and deteriorates the heating performance of the air conditioning unit.

[0212] 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 air conditioning unit of the upper equipment platform to draw in the hot air discharged from the air conditioning unit of the lower equipment platform, raising the condensing temperature, reducing the subcooling of the condensate, and deteriorating the cooling performance of the air conditioning unit.

[0213] In this embodiment, after the air conditioning unit on each floor exchanges heat, 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, which prevents the exhaust airflow from flowing back to the equipment platform. At the same time, it also prevents the risk that the exhaust airflow will be sucked into the adjacent equipment platform below (in winter) or the adjacent equipment platform above (in summer) after it is discharged from the equipment platform.

[0214] 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. An air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged, characterized in that, It includes a shell, an external heat exchanger, a compressor, and an exhaust chamber; the negative pressure chamber of the external heat exchanger is composed of a bottom plate, a side plate, a back plate, a top plate, and the external heat exchanger; the back plate is provided with an air outlet for the negative pressure chamber of the external heat exchanger, and the air outlet is equipped with a vertically arranged fan; The external heat exchanger is disposed on the air inlet side of the shell, and the external heat exchanger is the air inlet of 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 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 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 fins is a broken line type. 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 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 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 incident surface of the inlet airflow is each finned tube heat exchanger in the external heat exchanger. 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 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 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 fin plates of the finned tube heat exchanger in the external heat exchanger 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 air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to 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.

3. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to claim 2, characterized in that, The fan is a centrifugal fan.

4. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged as described in claim 3, characterized in that... The centrifugal fan is a backward-inclined external rotor centrifugal fan.

5. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged as described in claim 2, characterized in that... The fan is an axial flow fan.

6. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to 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.

7. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to claim 1, characterized in that, The exhaust cavity is a cavity with a one-way exhaust port, and is composed 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.

8. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged as described in claim 1, characterized in that... The exhaust port of the exhaust chamber is a vertical rectangular exhaust port.

9. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged as described in claim 7, 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 air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to claim 1, characterized in that, An exhaust section is installed at the exhaust vent.

11. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged 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 louvered louvers, or the air guide plates are arranged vertically and are provided with an angle to guide the exhaust airflow away from the air conditioning unit.

12. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to claim 1, characterized in that, The compressor chamber is located 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.

13. The air conditioning unit with its air inlet and exhaust surfaces orthogonally arranged according to claim 1, characterized in that, The air conditioning unit is also equipped with an intermediate heat exchanger. The two heat exchange medium channels of the intermediate heat exchanger 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.

14. An air conditioning unit platform, characterized in that, The air conditioning unit according to any one of claims 1 to 13 is installed inside 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 air conditioning unit 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 air conditioning unit platform according to claim 15, 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 opening structure of the louvers.

17. The air conditioning unit platform according to claim 16, 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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