An air conditioner main unit and equipment platform with a front fan wall exhaust cavity and a small area exhaust outlet

Abstract

The application belongs to the technical field of new energy, and discloses an air conditioner main machine and equipment platform with a front fan wall exhaust cavity and a small-area exhaust outlet. The air conditioner main machine comprises a shell, an outer heat exchanger arranged in the shell, an outer heat exchanger negative pressure cavity composed of the outer heat exchanger, part of the shell and a back plate, and an exhaust cavity. A plurality of exhaust outlets of the outer heat exchanger negative pressure cavity are arranged on the back plate, and a fan is arranged on the exhaust outlet. An air outlet of the exhaust cavity is arranged on an exhaust cavity panel opposite to the fan. The air inlet, the outer heat exchanger, the outer heat exchanger negative pressure cavity, the fan, the exhaust cavity and the air outlet of the air conditioner main machine form a progressive layout of the air inlet and outlet path with the outer heat exchanger arranged at the back, the fan and the exhaust cavity arranged at the front. The application constructs an outer heat exchanger air path with a short path, low resistance, large air volume, high heat exchange intensity, improves the energy density of the air conditioner main machine body, and constructs a new air path structure relationship between the air conditioner main machine and the outer surface of the equipment platform.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, and in particular relates to an air conditioning unit and equipment platform that adopts a small-area exhaust port of the front-mounted fan wall exhaust cavity. Background Technology

[0002] Currently, the airflow structure of the external heat exchanger module of household air conditioning units is mostly based on the paradigm of "large-area low-speed air intake on the side and back, medium-speed air exhaust by multiple fans on the front, and side-in, side-out airflow" oriented towards open atmospheric environments, as shown in the attached diagram. Figure 1 As shown.

[0003] Current household air conditioner main unit, as shown in the attached document. Figure 2 As shown, the design of high-power multi-split air-discharge structure was rejected, while the classic side-discharge structure of room air conditioners was adopted. The air conditioners were moved from the open atmospheric environment suspended on the exterior facade of the building to the equipment platform of the exterior corridor with a decorative facade, resulting in serious problems of poor ventilation and deterioration of air conditioning performance.

[0004] In recent years, architects have emphasized the decorative aspects of building and equipment platform facades. When architects conceal air conditioning units on the equipment platform facade with louvers for visual appeal, the exhaust air from medium-speed exhaust units (below 7 m / s) to the external atmosphere is obstructed. This results in increased exhaust static pressure, decreased exhaust velocity, and reduced airflow. A significant portion of the reduced exhaust airflow is blocked by the louvers and returned to the equipment platform, where it is then drawn back into the external heat exchanger, causing airflow short-circuiting. The diffusion and dilution effect of exhaust air passing through the louvers and entering the ambient atmosphere is severely suppressed. Consequently, during summer cooling operation, the external heat exchanger experiences excessively high condensing pressure and insufficient condensate cooling; during winter heating operation, the external heat exchanger experiences excessively low evaporating pressure and a significant reduction in refrigerant circulation. The air conditioner's function as a heat transporter is thus compromised, leading to a substantial decrease in the performance of the air conditioning unit on the equipment platform compared to laboratory data. Summary of the Invention

[0005] To address the aforementioned technical problems and construct an external heat exchanger inlet and outlet air field with short path, low resistance, large air volume, and high heat exchange intensity, this invention provides an air conditioning unit with a small-area exhaust port using a front-mounted fan wall exhaust cavity.

[0006] Another objective of this invention is to provide an air conditioning unit platform.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] An air conditioning unit with a front-mounted fan and a small-area exhaust port in the wall exhaust cavity includes a housing, an external heat exchanger disposed within the housing, an external heat exchanger negative pressure chamber consisting of the external heat exchanger, a portion of the housing, and a back plate, and an exhaust cavity; the back plate is provided with several exhaust ports for the external heat exchanger negative pressure chamber, each exhaust port is equipped with a fan, and the exhaust port of the exhaust cavity is located on the exhaust cavity panel opposite the fan; the air inlet, external heat exchanger, external heat exchanger negative pressure chamber, fan, exhaust cavity, and exhaust port of the air conditioning unit constitute a progressive air inlet and outlet layout with the external heat exchanger positioned at the rear and the fan and exhaust cavity positioned at the front.

[0009] The air conditioning unit described in this invention includes a unit suitable for an air conditioning refrigeration system and also a unit suitable for an air source water heater.

[0010] Furthermore, the external heat exchanger is one of the following: a horizontal cross-section C-type finned tube heat exchanger, a horizontal cross-section L-type finned tube external heat exchanger, a horizontal cross-section V-type finned tube heat exchanger assembly, or a serrated zigzag finned tube heat exchanger assembly.

[0011] Furthermore, the horizontal cross-section V-shaped finned tube heat exchanger assembly includes 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 fin is a broken line type.

[0012] 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.

[0013] 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.

[0014] 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°.

[0015] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 90°.

[0016] Preferably, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 60°.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0021] 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.

[0022] 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.

[0023] Furthermore, the sawtooth-shaped zigzag finned tube heat exchanger assembly is composed of a flat plate finned tube heat exchanger, a V-shaped finned tube heat exchanger, and a baffle plate; the sawtooth-shaped zigzag finned tube heat exchanger assembly is sawtooth-shaped on the cross-section perpendicular to the long side of the fins.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Preferably, the finned copper tube forms an obtuse angle with the sidewall of the negative pressure chamber of the adjacent external heat exchanger.

[0029] Furthermore, the back panel is provided with at least two exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall; preferably, the fan is a centrifugal fan or an axial fan; more preferably, the centrifugal fan is a backward-inclined external rotor centrifugal fan.

[0030] Furthermore, the air outlet area of ​​the exhaust cavity is 15-60% of the air inlet area of ​​the negative pressure cavity of the external heat exchanger.

[0031] Furthermore, the air outlet of the exhaust chamber is located in the middle or lower part of the exhaust chamber panel; preferably, the air outlet includes a horizontal strip or a vertical strip, which is disposed in the middle or lower part of the exhaust chamber panel.

[0032] Furthermore, an exhaust section is provided at the air outlet.

[0033] 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.

[0034] Furthermore, a swooping exhaust section is provided at the air outlet; the swooping exhaust section is provided with several guide vanes.

[0035] Furthermore, a protruding exhaust section is provided at the air outlet; several guide plates are provided inside the protruding exhaust section.

[0036] Furthermore, the sides of the negative pressure chamber and exhaust chamber of the external heat exchanger are provided with a compressor chamber for housing the fluorine circuit assembly, including the compressor, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0037] 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.

[0038] An air conditioning unit platform, wherein the air conditioning unit is installed inside an outer corridor-type equipment platform, and the air outlet of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

[0039] Furthermore, an exhaust section is provided at the air outlet; the exhaust section is installed adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform. Furthermore, a swooping exhaust section is provided at the air outlet; the swooping exhaust section is installed adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform; the guide vanes of the swooping exhaust section are parallel to or nearly parallel to the louver slats.

[0040] Furthermore, an exhaust section is provided at the air outlet; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with opening structures that match 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. Furthermore, a protruding exhaust section is provided at the air outlet; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with opening structures that match 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.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] ① Construct an external heat exchanger air path that is short, has low resistance, large air volume, and high heat exchange intensity.

[0043] A small rectangular air outlet is set on the outer surface of the exhaust cavity of the external heat exchanger. The air outlet is located inside the exhaust cavity before the air outlet. The flow cross section of the exhaust air from each fan is large, the path is short, and the resistance is low. The rectangular air outlet is small, not exceeding 1 / 2 of the air inlet area of ​​the external heat exchanger. Under the static pressure drive of the exhaust cavity, the speed and dynamic pressure head of the exhaust air flowing out of the positive pressure exhaust cavity are more than 2 times and 4 times the air inlet speed and dynamic pressure head of the external heat exchanger, respectively. It has strong penetration ability and good diffusion and dilution effect.

[0044] Traditional residential central air conditioning units have exhaust surfaces composed of multiple disc-shaped medium-speed axial flow fans, which are difficult to fit into the louver structure of the equipment platform's exterior facade, making it difficult for the air from the air conditioning unit to pass through the louvers with low resistance. This invention constructs an external heat exchanger airflow path that effectively prevents exhaust air backflow short circuits by using a linear progressive layout of the air conditioning unit's air inlet, external heat exchanger assembly, external heat exchanger negative pressure chamber, fan wall, external heat exchanger exhaust chamber, and small rectangular air outlet of the exhaust chamber. This creates an external heat exchanger airflow path that is short, has low resistance, large air volume, high heat exchange intensity, and high exhaust velocity, thus preparing the conditions for further constructing an airflow path that fits the louver structure of the equipment platform's exterior facade.

[0045] ② Construct a heavy-duty external heat exchanger structure for the air conditioning unit to improve the energy density of the air conditioning unit itself.

[0046] This invention uses a horizontal cross-section V-shaped finned tube heat exchanger as the basic unit of the external heat exchanger assembly of the air conditioning unit. Within the limited space of the air conditioning unit, the horizontal cross-section V-shaped finned tube heat exchanger is set parallel to the air inlet of the unit. It is spread out along the air inlet surface of the horizontal cross-section V-shaped finned tube heat exchanger assembly to obtain a large area of ​​heat exchanger ventilation surface. It is then spread out again on the large area of ​​heat exchanger ventilation surface to obtain a huge area of ​​finned heat transfer surface.

[0047] The air conditioning unit of this invention uses multiple fans on a vertically mounted fan wall to draw air from the negative pressure chamber of the external heat exchanger, creating negative pressure within the chamber. This draws ambient air in at a medium speed (around 4 m / s) instead of the traditional low speed (below 2 m / s) from the air inlet of the air conditioning unit. In the chain process of medium-speed airflow in the external heat exchanger → fin planer step-by-step planing and deceleration → heat exchange on a huge fin heat exchange area on the total ventilation surface → convergence and acceleration → fan pressurization → high-speed discharge, the fan serves as the power source, and the massive, continuously arranged horizontal cross-section V-shaped finned tube heat exchanger fin planer is the core, completing the deceleration and air distribution between the fins. This efficient and smooth process constructs a high-volume, high-strength, heavy-duty, and efficient heat exchange structure inside the air conditioning unit.

[0048] The fan of this invention is arranged vertically, with the air inlet directly facing the external heat exchanger. This reduces the local resistance of the airflow turning upwards before the air inlet of the fan in traditional multi-split air conditioners. The fin planer of this invention planes the airflow in the main body in stages, causing the airflow line to enter and exit the fin gap in a zigzag form in a plane perpendicular to the long side of the fin. This generates local resistance such as airflow impacting the fin tip and turning, airflow deceleration due to expansion of the flow cross section within the fin gap, and airflow acceleration due to turning out of the fin gap. The local resistance of the airflow entering and exiting the fin gap is significantly greater than the resistance of the air inlet section before the finned tube heat exchanger assembly and the resistance of the air outlet section afterward. This makes the "throttling" effect of the fin gap on the airflow more obvious, thereby improving the uniformity of ventilation and heat exchange on the surface of the finned tube external heat exchanger assembly. Because this invention overcomes the problem of uneven vertical ventilation and heat exchange in traditional multi-split external heat exchangers, the height of the external heat exchanger can be increased from the traditional design of about 1200mm for multi-split air conditioners to over 2000mm.

[0049] In this invention, flow resistance and convective heat transfer coefficient are a pair of "opposing and unified" heat exchange factors. Improving the convective heat transfer coefficient usually comes at the cost of increasing flow resistance. The baffles in the shell and tube heat exchanger and the fin planer of this invention both improve the convective heat transfer coefficient by increasing the necessary flow resistance.

[0050] Through the above measures, the present invention significantly improves the load intensity of the external heat exchanger and the energy density of the air conditioning unit. Attached Figure Description

[0051] Figure 1 A 3D view of the existing rear-inlet, front-outlet central air conditioning unit;

[0052] Figure 2 This is a top view of the airflow path of the external heat exchanger of a central air conditioning unit with a rear-inlet and front-outlet airflow. Due to the obstruction of the airflow by the louvers on the equipment platform, the static pressure of the outlet air increases, the airflow decreases, and some of the outlet air flows back to the air inlet.

[0053] Figure 3This is a three-dimensional sectional view of the air conditioning unit with a small-area air outlet in the front fan wall exhaust cavity of Example 1;

[0054] Figure 4 This is a front view of the air conditioning unit with a small air outlet in the front fan wall exhaust cavity of Example 1;

[0055] Figure 5 This is a top view of the air conditioning unit with a small air outlet in the front fan wall exhaust cavity of Example 1;

[0056] Figure 6 This is a three-dimensional structural diagram of a horizontal cross-section V-shaped finned tube heat exchanger assembly.

[0057] 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.

[0058] Figure 8 This is a top view of the airflow of the air conditioning unit at the small-area air outlet of the front fan wall exhaust cavity in Example 1.

[0059] Figure 9 This is a longitudinal vertical sectional view of the airflow of the air conditioning unit at the small area air outlet of the front fan wall exhaust cavity in Example 1.

[0060] Figure 10 This is a schematic diagram of the air conditioning system with a small air outlet in the wall exhaust cavity of the front fan, as shown in Example 1.

[0061] Figure 11 This is a top view of the front fan wall exhaust cavity small-area air outlet and the rear L-shaped finned tube heat exchanger air conditioning unit in Example 2.

[0062] Figure 12 This is a top view of the airflow of the air conditioning unit with a small-area air outlet in the front fan wall exhaust cavity and a rear L-shaped finned tube heat exchanger, as shown in Example 2.

[0063] Figure 13 This is a longitudinal vertical sectional view of the airflow of the front fan wall exhaust cavity small-area air outlet and the rear L-shaped finned tube heat exchanger air conditioning unit in Example 2.

[0064] Figure 14 This is a top view of the air conditioning unit of the front fan wall exhaust cavity with a small area exhaust port and a rear horizontal cross section C-shaped finned tube heat exchanger in Example 3.

[0065] Figure 15 This is a front view of the air conditioning unit with a horizontal strip-shaped air outlet in Example 4;

[0066] Figure 16This is a vertical sectional view of the air conditioning unit with a horizontal strip-shaped air outlet in Example 4;

[0067] Figure 17 This is a front view of the air conditioning unit with vertical strip-shaped air outlets in Embodiment 5;

[0068] Figure 18 This is a vertical sectional view of the air conditioning unit in Example 6, where the air outlet is located at the lower part of the exhaust cavity panel.

[0069] Figure 19 This is a front view of the air conditioning unit with a vertical strip-shaped downward-facing exhaust vent, as shown in Example 7.

[0070] Figure 20 This is a vertical sectional view of the air conditioning unit with a vertical strip-shaped downward-facing exhaust vent, as shown in Example 7.

[0071] Figure 21 This is a diagram showing the distribution of the air intake and exhaust zones on the louvers of the exterior facade of the air conditioning unit with a vertical strip-shaped downward-facing exhaust vent in Example 7, when it is running on the equipment platform.

[0072] Figure 22 This is a schematic diagram of an air conditioning system with an intermediate heat exchanger for producing air conditioning water input to the indoor unit, as shown in Example 8.

[0073] Figure 23 This is a front view of the air conditioning unit with a horizontally convex exhaust section, as shown in Example 10.

[0074] Figure 24 This is a vertical sectional view of the horizontal strip-shaped outwardly protruding exhaust section of the air conditioning unit embedded in the louver opening structure of the equipment platform in Example 10.

[0075] Figure 25 This is a diagram showing the distribution of the air intake and exhaust zones on the exterior of the equipment platform during operation of the air conditioning unit with a horizontal strip-shaped outward-protruding exhaust section embedded in the louvered opening structure of the equipment platform, as shown in Example 10.

[0076] Figure 26 This is a top view of the air conditioning unit of the sawtooth-shaped finned tube heat exchanger assembly in Example 9.

[0077] Figure 27 This is a top view of the airflow during operation of the air conditioning unit of the serrated zigzag finned tube heat exchanger assembly in Example 9.

[0078] Figure 28 Top view of the air conditioning unit structure with rear-mounted finned tube heat exchanger assembly, front fan wall exhaust cavity, and lateral airflow drift.

[0079] Figure 29 A top view of the airflow operation of the air conditioning unit, showing the side exhaust airflow from the front fan wall.

[0080] Figure 30 A schematic diagram showing the distribution of the air inlet and exhaust surfaces on the exterior of the equipment platform during summer operation of the air conditioning unit, with the exhaust airflow from the side of the front fan wall drifting laterally.

[0081] Figure 31 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

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Example 1

[0087] like Figures 3-5 As shown, an air conditioning unit with a small exhaust port in the wall exhaust cavity of a front-mounted fan includes a housing 1, an external heat exchanger 2 disposed in the housing, an external heat exchanger negative pressure cavity 22 consisting of the external heat exchanger 2, part of the housing and a back plate 21, and an exhaust cavity 3.

[0088] The side of the external heat exchanger negative pressure chamber 22 and the exhaust chamber 3 is provided with a compressor chamber 4 for housing the fluorine circuit assembly including the compressor 41, gas-liquid separator 42, four-way valve, expansion valve and electrical box.

[0089] The back plate 21 is provided with four exhaust vents 23 for the negative pressure chambers 22 of the external heat exchangers. Each exhaust vent 23 is equipped with a fan 24, forming a fan wall. The fan 24 is located inside the exhaust chamber 3 and is a backward-inclined external rotor centrifugal fan.

[0090] The area of ​​the air outlet 31 of the exhaust chamber is 15-60% of the air inlet area of ​​the negative pressure chamber 22 of the external heat exchanger.

[0091] The exhaust port 31 of the exhaust chamber is rectangular and is located in the middle of the exhaust chamber panel 32 opposite to the fan 24.

[0092] like Figure 6-7 As shown in the illustration, in one specific implementation, the external heat exchanger 2 in this embodiment is a horizontal cross-section V-shaped finned tube heat exchanger assembly. The horizontal cross-section V-shaped finned tube heat exchanger assembly consists of four flat-plate finned tube heat exchangers 37; or it can be composed of two continuously arranged V-shaped finned tube heat exchangers 40 with cross-sections perpendicular to the long side of the fins. Each V-shaped finned tube heat exchanger 40 consists of two flat-plate finned tube heat exchangers 37.

[0093] Heat exchange tube 115 connects to lotus head gas collection tube 133 and refrigerant circuit 134.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] The apex angle α of the V-shaped finned tube heat exchanger is 15° to 110°.

[0099] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 90°.

[0100] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 60°.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0105] 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.

[0106] 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.

[0107] like Figure 8 and 9 As shown, in this embodiment, the air inlet 11, external heat exchanger 2, external heat exchanger negative pressure chamber 22, fan 24, exhaust chamber 3 and air outlet 31 of the air conditioning unit constitute an air inlet and outlet path with the external heat exchanger at the rear and the fan and exhaust chamber at the front.

[0108] This embodiment describes an air conditioning unit that uses a small-area exhaust vent in the front wall of a fan and a finned tube heat exchanger in the rear. 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.

[0109] ① Innovative structural design of air conditioning unit

[0110] Compared with classic household air conditioner units, the core features of the air conditioner unit in this embodiment are: adopting a horizontal cross-section V-shaped finned tube heat exchanger with an ultra-large heat exchange area; placing the horizontal cross-section V-shaped finned tube heat exchanger at the rear in the overall structure; placing the fan wall, exhaust cavity and air outlet at the front; and setting a small area exhaust outlet on the outer surface of the front exhaust cavity.

[0111] like Figure 6-7 As shown, the horizontal cross-section V-shaped finned tube heat exchanger assembly of this embodiment includes a W-shaped structure composed of four flat plate finned tube heat exchangers; or a W-shaped structure composed of a V-shaped finned tube heat exchanger formed by bending two flat plate finned tube heat exchangers; or a W-shaped structure composed of a flat plate finned tube heat exchanger and a V-shaped finned tube heat exchanger formed by bending flat plate finned tube heat exchangers; the cross-section of the finned tube external heat exchanger perpendicular to the long side of the fin is a broken line type.

[0112] In this embodiment, within the limited space of the air conditioning unit, two horizontally cross-section V-shaped finned tube heat exchangers are arranged parallel to the air inlet surface of the air conditioning unit. The heat exchangers are spread out along the air inlet surface of the horizontally cross-section V-shaped finned tube heat exchangers to obtain a large area of ​​external heat exchanger ventilation surface. The heat exchangers are then spread out again on the large area of ​​external heat exchanger ventilation surface to obtain a huge area of ​​finned heat transfer surface. This effectively increases the total heat transfer area of ​​the fins of the external heat exchangers of the air conditioning unit, reduces the heat transfer temperature difference of the external heat exchanger body, increases the evaporation pressure and reduces the condensation pressure, and improves the cooling capacity and energy efficiency ratio of the refrigeration and air conditioning system.

[0113] like Figure 4-5 As shown, this embodiment provides an external heat exchanger negative pressure chamber 22, which 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).

[0114] A horizontally continuous V-shaped finned tube heat exchanger is arranged on the back plate 21, and four exhaust vents 23 are provided on the back plate 21. A backward-curved external rotor centrifugal fan 24 is installed at the exhaust vents 23 on the back plate 21. The exhaust vents 23 on the back plate 21 are also the air intakes of the backward-curved external rotor centrifugal fans. The back plate 21 with multiple exhaust vents 23 and multiple backward-curved external rotor centrifugal fans 24 constitutes a centrifugal fan wall.

[0115] An exhaust chamber 3 is provided on the outside of the rear-inclined external rotor centrifugal fan wall. The exhaust chamber 3 is composed of the fan wall, side panel (i.e., the side panel of the shell 1), bottom plate (i.e., the bottom plate of the shell 1), top plate (i.e., the top plate of the shell 1) and exhaust chamber panel 32 (i.e., the panel of the shell 1). The air outlet 31 of the exhaust chamber is located on the opposite surface of the exhaust chamber panel 32, i.e., the fan wall.

[0116] 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, which is used to house the fluorine circuit assembly including the compressor 41, gas-liquid separator 42, four-way valve 43, expansion valve and electrical box.

[0117] ② Innovative design of the air conditioning unit's external heat exchanger inlet and outlet airflow.

[0118] This embodiment describes an air conditioning unit that uses a front-mounted fan wall with a small-area exhaust port and a rear-mounted finned tube heat exchanger. The air inlet 11, the negative pressure chamber 22 of the external heat exchanger, the exhaust chamber 3, and the exhaust chamber outlet 31 form a progressive layout of air inlet and outlet with the external heat exchanger at the rear and the fan and exhaust chamber at the front, creating an external heat exchanger air inlet and outlet field with a short path, low resistance, large air volume, and high heat exchange intensity.

[0119] like Figure 8 and 9 As shown, during the ventilation and heat exchange operation of the external heat exchanger in this embodiment, the airflow from the air inlet 11 to the outlet 31 of the air conditioning unit is powered by the fan 24, and the heat exchange airflow undergoes two static pressure-dynamic pressure conversions. The first static pressure-dynamic pressure conversion enables high-speed airflow intake at the fan inlet, and the second static pressure-dynamic pressure conversion enables high-speed airflow discharge at the outlet of the exhaust chamber. Furthermore, the airflow lines entering and exiting the fin gaps of the finned tube heat exchanger in this embodiment are zigzag airflow lines with two bends, located in a plane perpendicular to the long side of the fins, rather than in a plane parallel to the fins. These two points are the most essential motion characteristics of the ventilation and heat exchange process of the external heat exchanger in this embodiment.

[0120] In this embodiment, multiple fans on the fan wall are used to establish the airflow field of the V-shaped finned tube external heat exchanger of the air conditioning unit with horizontal cross-section. Four fans 24 on the vertically set fan wall draw air from the negative pressure chamber 22 of the external heat exchanger to generate negative pressure inside the chamber. This draws ambient air at 0 Pa static pressure (gauge pressure) into the air conditioning unit from the air inlet at a medium speed (about 4 m / s). The airflow is dispersed and slowed down by planing the airflow through multiple fins. It then flows through the gaps between the fins of the V-shaped finned tube heat exchanger at a low speed (below 2 m / s) to complete heat exchange. After that, it enters the negative pressure chamber 22 of the external heat exchanger, then converges and accelerates. The airflow flows at high speed into the fan inlet with the lowest pressure (negative gauge pressure) along the entire path, completing the first static pressure to dynamic pressure conversion.

[0121] The high-speed airflow flowing into the fan intake is pressurized by the fan and sent into the exhaust chamber 3, which is under positive pressure relative to the atmospheric environment. Under the action of positive pressure in the exhaust chamber, the airflow is injected into the atmospheric environment at high speed (about 8m / s) from the small rectangular air outlet 31 on the outer surface of the exhaust chamber for diffusion and dilution. In this embodiment, the heat exchange airflow from the air inlet of the air conditioning unit to the air outlet, driven by the fan, undergoes two static pressure-dynamic pressure conversions to achieve high-speed intake of the fan and high-speed exhaust of the exhaust chamber.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] In this embodiment, a compressor chamber 4 is provided on the side of the negative pressure chamber 22 of the external heat exchanger and the exhaust chamber 3 for housing circuit components including a compressor 41, a gas-liquid separator 42, a four-way valve 43, an expansion valve, an electrical box, and a power cable signal line electrical box.

[0127] like Figure 10As shown, these refrigeration circuit components, along with the external heat exchanger, refrigerant connecting pipes, indoor unit heat exchanger, and other components, form a refrigeration and air conditioning cycle circuit in the order of compressor-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor. The compressor, as the power source of the refrigeration cycle circuit, establishes high and low pressure states for the refrigerant in the condenser and evaporator pipes, driving the refrigerant to circulate and undergo repeated phase changes in the refrigeration cycle circuit to achieve "heat transfer." Specifically, the refrigerant liquid absorbs heat through evaporation in the evaporator pipes and then absorbs heat from the low-temperature ambient air flowing between the fins through the large heat absorption area S of the copper pipes. The high-temperature, high-pressure refrigerant gas releases heat through condensation in the condenser pipes and then releases heat to the high-temperature ambient air flowing between the fins through the large heat release area S of the copper pipes. This achieves the migration of heat from the low-temperature environment where the air conditioner evaporator is located to the high-temperature environment where the condenser is located.

[0128] Example 2

[0129] like Figure 11 As shown, both this embodiment and Embodiment 1 adopt a physical structure with the external heat exchanger positioned at the rear, the fan and exhaust cavity positioned at the front, and the compressor cavity positioned on the side. The difference between this embodiment and Embodiment 1 is that the external heat exchanger 2 adopts a horizontal cross-section L-shaped finned tube external heat exchanger.

[0130] The air conditioning unit in this embodiment addresses the problems in the background technology by creatively reconstructing the external heat exchanger airflow structure and the air conditioning unit structure, thus creating conditions for the integration of the air conditioning unit and the equipment platform.

[0131] ① Air Conditioning Unit Structural Design

[0132] Compared to classic household air conditioner units, the core features of the air conditioner unit in this embodiment are: a front fan wall and a positive pressure exhaust cavity are provided, and a small exhaust vent is provided on the panel of the positive pressure exhaust cavity.

[0133] In this embodiment, the air conditioning unit uses a finned tube heat exchanger for the external heat exchanger, and the horizontal cross-section of the finned tube external heat exchanger assembly perpendicular to the long side of the fin is L-shaped.

[0134] In this embodiment, one external heat exchanger negative pressure chamber 22 is provided. The external heat exchanger negative pressure chamber 22 is composed of a horizontal cross-section L-shaped finned tube external heat exchanger 2, a bottom plate (i.e., the bottom plate of the shell 1), a side plate 25, a back plate 21, and a top plate (i.e., the top plate of the shell 1). The back plate 21 is set opposite to the horizontal cross-section L-shaped finned tube external heat exchanger. Four exhaust ports 23 are provided on the back plate 21. A backward-inclined external rotor centrifugal fan is installed at the exhaust ports 23 on the back plate 21. The exhaust ports 23 on the back plate 21 are also the air intake ports of the backward-inclined external rotor centrifugal fan. The back plates with multiple exhaust ports and multiple backward-inclined external rotor centrifugal fans constitute the fan wall.

[0135] An exhaust cavity 3 is provided on the outside of the fan wall. The exhaust cavity 3 is composed of the fan wall, a side panel (i.e., the side panel of the housing 1), a bottom plate (i.e., the bottom plate of the housing 1), a top plate (i.e., the top plate of the housing 1), and an exhaust cavity panel 32 (i.e., the panel of the housing 1). The air outlet 31 of the exhaust cavity is located on the opposite side of the exhaust cavity panel 32, i.e., the fan wall.

[0136] A compressor chamber 4 is provided on the side of the external heat exchanger 2, the fan wall, and the exhaust chamber 3 to house the fluorine circuit components, including the compressor 41, the gas-liquid separator 42, the four-way valve, the expansion valve, and the electrical box.

[0137] ② Air conditioning unit external heat exchanger inlet and outlet airflow design

[0138] In this embodiment, the air inlet of the air conditioning unit, the external heat exchanger, the negative pressure chamber of the external heat exchanger, the exhaust chamber, and the rectangular small-area exhaust port of the exhaust chamber are arranged in a sequential linear layout to create an external heat exchanger inlet and outlet air field with short path, low resistance, large air volume, and high heat exchange intensity.

[0139] like Figure 12-13 As shown, during the ventilation and heat exchange operation of the external heat exchanger in this embodiment, the airflow from the air inlet to the outlet of the air conditioning unit is powered by a centrifugal fan, and the heat exchange airflow undergoes two static pressure-dynamic pressure conversions. The first static pressure-dynamic pressure conversion enables the high-speed intake of airflow from the centrifugal fan intake port, and the second static pressure-dynamic pressure conversion enables the high-speed discharge of airflow from the exhaust port. This is the most essential motion characteristic of the ventilation and heat exchange process of the external heat exchanger in this embodiment.

[0140] In this embodiment, multiple centrifugal fans on the fan wall establish the airflow field for the external heat exchanger of the air conditioning unit: four centrifugal fans on the fan wall draw air from the negative pressure chamber 22 of the external heat exchanger, creating negative pressure within the chamber. This draws ambient air at 0 Pa static pressure (gauge pressure) into the air conditioning unit from the air inlet. The air flows at low speed (below 2 m / s) through the gaps between the fins of the external heat exchanger to complete heat exchange. Afterward, it enters the negative pressure chamber 22 of the external heat exchanger, where it converges and accelerates. The high-speed airflow flows into the area with the lowest pressure along the entire path (gauge pressure is negative). The airflow enters the fan inlet (value) and completes the first static pressure-dynamic pressure conversion. The airflow flowing into the fan inlet at high speed is boosted by the fan and sent into the exhaust chamber 3, which is under 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 area air outlet on the exhaust chamber panel for diffusion and dilution. In this embodiment, the heat exchange airflow from the air inlet of the air conditioning unit to the air outlet, driven by the fan, undergoes two static pressure-dynamic pressure conversions to achieve high-speed intake of the fan and high-speed exhaust of the exhaust chamber.

[0141] 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.

[0142] 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.

[0143] In this embodiment, a compressor chamber 4 is provided on the side of the external heat exchanger 2, the fan wall, and the exhaust chamber 3 to house the fluorine circuit components, including a compressor 41, a gas-liquid separator 42, a four-way valve, an expansion valve, and an electrical box. These refrigeration circuit components, along with the external heat exchanger 2, refrigerant connecting pipes, indoor unit heat exchangers, and other components, form a refrigeration and air conditioning cycle circuit in the order of compressor-four-way valve-condenser-expansion valve-evaporator-four-way valve-gas-liquid separator-compressor. The compressor 41 serves as the power source for the refrigeration cycle circuit, establishing high and low pressure states for the refrigerant in the condenser and evaporator pipes, driving the refrigerant to circulate and undergo repeated phase changes in the refrigeration cycle circuit to achieve "heat transfer." Specifically, the refrigerant liquid absorbs heat through evaporation in the evaporator pipes and then absorbs heat from the low-temperature ambient air flowing between the fins through the large heat absorption area S of the copper pipes. The high-temperature, high-pressure refrigerant gas releases heat through condensation in the condenser pipes and then releases heat to the high-temperature ambient air flowing between the fins through the large heat release area S of the copper pipes, thus realizing the migration of heat from the low-temperature environment where the air conditioner evaporator is located to the high-temperature environment where the condenser is located.

[0144] Example 3

[0145] like Figure 14 As shown, both this embodiment and embodiment 2 adopt a physical structure with the external heat exchanger at the rear, the fan and exhaust cavity at the front, and the compressor cavity at the side. The difference between this embodiment and embodiment 2 is that the external heat exchanger 2 adopts a horizontal cross-section C-shaped finned tube heat exchanger.

[0146] Because it uses a horizontal cross-section C-shaped finned tube heat exchanger, the heat exchange area is larger, the air path of the left and right rows of fans is more symmetrical and balanced, and the energy efficiency ratio of the air conditioning unit is higher.

[0147] Example 4

[0148] like Figure 15-16 As shown, both this embodiment and Embodiment 1 employ a physical structure with the external heat exchanger positioned at the rear, the fan and exhaust chamber at the front, and the compressor chamber on the side. The difference between this embodiment and Embodiment 1 is that the air outlet 31 of the exhaust chamber 3 is located in the middle of the exhaust chamber panel 32. The air outlet 31 is a horizontal rectangular strip.

[0149] This embodiment has all the advantages of embodiment 1, and the horizontal strip-shaped rectangular air outlet 31 is located in the horizontal middle of the exhaust cavity panel 32, which is relatively high and avoids possible spatial interference between the lower edge of the air outlet 31 and the water baffle 51 of the equipment platform 5.

[0150] Example 5

[0151] like Figure 17 As shown, both this embodiment and Embodiment 1 employ a physical structure with the external heat exchanger positioned at the rear, the fan and exhaust chamber at the front, and the compressor chamber on the side. The difference between this embodiment and Embodiment 1 is that the air outlet 31 of the exhaust chamber 3 is located in the middle of the exhaust chamber panel 32. The air outlet 31 is a vertically rectangular strip.

[0152] This embodiment has all the advantages of embodiment 1, and the horizontal strip-shaped rectangular air outlet 31 is located in the vertical center of the exhaust cavity panel 32, which is suitable for the equipment platform 5 with vertical strip-shaped decorative strips on the outer facade of the equipment platform.

[0153] Example 6

[0154] like Figure 18 As shown, both this embodiment and Embodiment 1 employ a physical structure with the external heat exchanger positioned at the rear, the fan and exhaust chamber at the front, and the compressor chamber on the side. The difference between this embodiment and Embodiment 1 is that the air outlet 31 of the exhaust chamber 3 is located at the lower part of the exhaust chamber panel 32. The air outlet 31 is either a vertical strip-shaped rectangle or a horizontal strip-shaped rectangle.

[0155] This embodiment has all the advantages of Embodiment 1, and the air outlet 31 is located at the lower part of the exhaust cavity panel 32, that is, near or directly connected to the bottom plate of the exhaust cavity 3 (i.e., the bottom plate of the housing 1). The position of the air outlet 31 in this embodiment is conducive to the discharge of debris, water, etc. in the exhaust cavity, keeping the exhaust cavity clean.

[0156] Example 7

[0157] like Figure 19-21 As shown, both this embodiment and Embodiment 5 employ a physical structure with the external heat exchanger positioned at the rear, the fan and exhaust chamber at the front, and the compressor chamber on the side. The difference between this embodiment and Embodiment 5 is that a swooping exhaust section 33 is provided at the air outlet 31; several guide vanes 34 are provided within the swooping exhaust section 33. The guide vanes 34 of the swooping exhaust section 33 are parallel to or nearly parallel to the louvers 52 of the equipment platform 5.

[0158] The deflector plate 34 is used to constrain and guide the direction of the exhaust airflow and connects to the louver 52 on the exterior facade.

[0159] In this embodiment, the small-area, downward-sloping exhaust section on the exhaust cavity panel of the air conditioning unit, which fits the louvers on the exterior facade of the equipment platform, is a vertical strip-shaped rectangular structure that is vertically extended and set in the middle of the exhaust cavity panel 32.

[0160] 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 air outlet and enters the diving exhaust section 33. Under the constraint and guidance of the multiple guide plates 34 set in the diving exhaust section 33, the exhaust airflow rays are parallel or nearly parallel to the louver slats. The louver slats have the smallest interception area and the lowest interception resistance for the exhaust airflow. The exhaust airflow passes through the louver slats on the outer facade of the equipment platform and is discharged at high speed into the external atmosphere, achieving long-range diffusion and dilution.

[0161] The air conditioning unit of this embodiment has all the advantages of embodiments 1 / 2 / 3, and has a new advantage with the swooping exhaust section 33:

[0162] ① Achieving a perfect balance between the decorative appeal of the exterior facade and the excellent thermal performance of the air conditioning unit.

[0163] Louvers have the function of shielding against wind and rain and preventing wind, frost, rain and snow from corroding the equipment platform and air conditioning unit. The installation method of using louvers to hide the air conditioning unit on the equipment platform will become widespread and solidified. The existing "rear inlet and front exhaust" air duct of the air conditioning unit's external heat exchanger will inevitably suffer from problems such as the air exhaust to the external atmosphere of the building being obstructed and suppressed by louvers, the exhaust static pressure increasing and the air volume decreasing, and the heat exchange performance of the external heat exchanger being severely degraded.

[0164] In this embodiment, the swooping exhaust section 33 located 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 connects 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.

[0165] ② The air intake and exhaust areas on the exterior facade of the equipment platform are separated to prevent exhaust air recirculation and short circuits.

[0166] In this embodiment, the downward-facing exhaust section 33 of the air conditioning unit exhaust cavity is vertically centered on the air conditioning unit housing panel and centered on the lower part of the outer facade of the equipment platform;

[0167] In this embodiment, when the air conditioning unit is running on the equipment platform, the louvers on the exterior facade corresponding to the two sides and the top of the air conditioning unit constitute the air intake area, and the louvers corresponding to the small central vertical strip air outlet area on the air conditioning unit housing panel constitute the exhaust area. The air intake area and the exhaust area are separated from each other, preventing exhaust air backflow short circuit.

[0168] In this embodiment, the exhaust cavity's downward-facing exhaust section 33 fits perfectly with the louvered window assembly on the exterior of the equipment platform, ensuring smooth exhaust from the air conditioning unit's external heat exchanger. Calculated using the equipment platform's exterior as a reference surface, the air conditioning unit's outlet area is very small, significantly smaller than the equipment platform's exterior air intake area (less than 1 / 3). The exhaust velocity is more than 3 times the intake velocity, and the exhaust dynamic pressure head on the exterior is more than 9 times the intake dynamic pressure head. The exhaust airflow travels a long distance through the exterior 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, and the air conditioner's task as a "heat transporter" is completed with high quality and efficiency.

[0169] ③ Installation on the air conditioning unit platform is convenient and quick.

[0170] In this embodiment, a swooping exhaust section 33 is set at the air outlet of the air conditioning unit's exhaust cavity, which is equipped with multiple guide plates. By constraining and inducing the exhaust airflow to be parallel or nearly parallel to the louvered slats, the exhaust airflow achieves "the louvered slats have the smallest interception area and the lowest interception resistance for the exhaust airflow. The exhaust airflow passes through the louvered slats on the outer facade of the equipment platform and is discharged at high speed into the external atmosphere. The exhaust airflow has a long range and good diffusion and dilution effect in the ambient atmosphere."

[0171] 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 section 33. "Close" rather than "contact" means that there is no need to implement a hard or soft connection between the downward-facing exhaust section 33 and the louvers. This 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 the hard connection.

[0172] Example 8

[0173] like Figure 22 As shown, the air conditioning unit in this embodiment is the same as that in embodiments 1-7, all of which adopt a physical structure with the external heat exchanger at the rear, the fan and exhaust cavity at the front, and the compressor cavity at the side.

[0174] 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.

[0175] The refrigerant passage connects to the refrigerant circuit of the air conditioning unit; the air conditioning water passage connects to the indoor heat exchanger 44.

[0176] 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.

[0177] This embodiment has all the advantages of embodiments 1-7. Furthermore, because the air conditioning unit adds an intermediate heat exchanger 6 to output air conditioning water to the indoor units inside the building, the refrigerant is blocked on the external corridor 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.

[0178] Example 9

[0179] like Figure 26-27 As shown, this embodiment has the same principle and structure as Embodiment 1, with the air inlet, finned tube heat exchanger assembly, negative pressure chamber, fan wall, and exhaust chamber arranged in a progressive manner, and the compressor chamber placed on the side.

[0180] The difference in this embodiment is that the external heat exchanger 2 is a sawtooth-shaped zigzag finned tube heat exchanger assembly composed of three flat finned tube heat exchangers 37 and a baffle 39; two of the flat finned tube heat exchangers 37 form a V-shaped finned tube heat exchanger 40, which can be formed by connecting the end plates of two flat finned tube heat exchangers to form a V-shaped finned tube heat exchanger, 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; another flat finned tube heat exchanger 37 is independently set outside the V-shaped finned tube heat exchanger, and a baffle 39 is set between it and the V-shaped finned tube heat exchanger. The space between the baffle 39 and the flat finned tube heat exchanger is the exhaust chamber of the flat finned tube heat exchanger, which is connected to the negative pressure chamber of the external heat exchanger.

[0181] The serrated zigzag finned tube heat exchanger assembly has a serrated shape on the cross-section perpendicular to the long side of the fins.

[0182] 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.

[0183] 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 22 of the external heat exchanger.

[0184] 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.

[0185] 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.

[0186] The finned copper tube forms an obtuse angle with the side wall of the adjacent external heat exchanger negative pressure chamber 22.

[0187] This embodiment uses a three-piece sawtooth-shaped 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.

[0188] Example 10

[0189] like Figure 23-25 As shown, an air conditioning unit platform is provided, with the air conditioning unit installed inside the outer corridor-type equipment platform, and the air outlet 31 of the exhaust cavity 3 facing the outer facade of the outer corridor-type equipment platform.

[0190] The air conditioning unit in this embodiment is similar to that in embodiment 4, both adopting a physical structure with the external heat exchanger at the rear, the fan and exhaust cavity at the front, and the compressor cavity at the side. The difference between the air conditioning unit in this embodiment and that in embodiment 4 is that the air outlet 31 is a horizontal strip-shaped rectangular air outlet, and the air outlet 31 is provided with a horizontal strip-shaped rectangular outwardly protruding exhaust section 35 that matches its shape; a number of guide plates 34 are provided inside the outwardly protruding exhaust section 35.

[0191] The louvers 52 of the outer corridor-type equipment platform 5 are provided with an opening structure 36 that matches the protruding exhaust section 35 located in the middle or lower part of the exhaust cavity 3. The protruding exhaust section 35 in the middle or lower part of the exhaust cavity 3 is embedded in the opening structure 36 of the louvers 52. When the air conditioning unit is running, the exhaust air from the air outlet 31 passes through the opening structure of the louvers and is directly discharged into the ambient atmosphere.

[0192] 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 louvered opening structure 36 are no longer hidden behind the louver, 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 louvered opening structure 36 do not need to be rigidly connected, so that the protruding exhaust section 35 is suspended in the louvered opening structure 36 or flexibly connected to the louvered opening structure, so as to avoid the transmission and amplification of the noise of the air conditioning unit.

[0193] Example 11

[0194] like Figure 28-31 As shown, in this embodiment, a front-mounted fan wall-side exhaust airflow is laterally diffused into the air conditioning unit. The compressor cavity of the air conditioning unit is located outside the negative pressure cavity of the external heat exchanger, that is, the compressor cavity is side-mounted. Its vertical strip-shaped air outlet 31 is connected to the side exhaust section 35. The side exhaust section 35 has a side guide plate group. The guide plate 34 is vertically arranged and has an angle to guide the exhaust airflow away from the air conditioning unit, that is, the guide plate group points at a small angle to the end away from the compressor cavity.

[0195] In this embodiment, the airflow from the side exhaust fan wall is directed to the air conditioning unit platform. The exterior facade is provided with louvers 52. The louvers 52 have a vertical strip opening structure 36 that is reserved close to the side wall to freely 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.

[0196] In this embodiment, when the air conditioning unit is operating, the airflow from the side exhaust fan wall drifts laterally. During operation, the positive pressure exhaust chamber of the air conditioning unit discharges the heat-exchanged air at high speed into the side exhaust section 35. Under the constraint and guidance of the guide vanes in the side exhaust section 35, the exhaust airflow drifts laterally when viewed horizontally. This prevents the exhaust airflow from flowing back into the unit and avoids it being drawn into adjacent units below (in winter) or above (in summer) after being discharged from the unit. 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, then gathers vertically in the space behind the compressor chamber of the air conditioning unit. In summer, the hot airflow moves upwards, and in winter, the cold airflow moves downwards, detaching from the vertical space of the unit and diffusing away from it.

[0197] In traditional high-rise buildings, especially high-rise residential buildings, during winter (summer) when the air conditioning unit's 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, cause the exhaust air to diffuse and dilute in the atmosphere, with some of the diluted exhaust air flowing back to the exterior facade. This results in cold (hot) air adhering to the exterior facade of the equipment platform, leading to a deterioration in the performance of the air conditioning unit.

[0198] In winter, the cold air discharged from the external heat exchangers of the air conditioners on each floor diffuses and dilutes in front of their facades and partially flows back. From a vertical perspective, the cold air discharged from multiple floors of the equipment platform moves downward as a whole and converges, linking together like beads in a chain, and the more and more it is chained, the more it covers the facade of the equipment platform. This causes the air conditioning units on the lower floors to draw in the cold air discharged from the air conditioning units on the upper floors, which reduces the evaporation temperature, reduces the refrigerant circulation, and deteriorates the heating performance of the air conditioning units.

[0199] In summer, the hot air discharged from the external heat exchangers of the air conditioners on each floor diffuses and dilutes in front of their facades and partially flows back. From a vertical perspective, the hot air discharged from the multiple floors of the equipment platform 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 air conditioning cooling performance.

[0200] In this embodiment, after heat exchange, the air from each air conditioning unit is constrained and guided by the guide vane assembly in the lateral exhaust section, and then drifts laterally at high speed to the outer space behind the compressor cavity of the air conditioning unit. 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 this equipment platform.

[0201] 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 employing a front-mounted fan wall exhaust chamber and a small-area exhaust port, characterized in that, The system includes a housing, an external heat exchanger housed within the housing, an external heat exchanger negative pressure chamber consisting of a bottom plate, side plates, a back plate, a top plate, and the external heat exchanger itself, and an exhaust chamber. The back plate has several exhaust vents for the external heat exchanger negative pressure chamber, each exhaust vent equipped with a fan. The exhaust outlet of the exhaust chamber is located on an exhaust chamber panel opposite the fan. The air inlet, external heat exchanger, external heat exchanger negative pressure chamber, fan, exhaust chamber, and exhaust outlet of the air conditioning unit constitute a progressive airflow path with the external heat exchanger positioned at the rear and the fan and exhaust chamber positioned at the front. The back panel is provided with at least two exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall; the fan is a centrifugal fan or an axial fan; The air outlet area of ​​the exhaust chamber is 15-60% of the air inlet area of ​​the negative pressure chamber of the external heat exchanger; the external heat exchanger is one of 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 a flat plate finned tube heat exchanger, a V-shaped finned tube heat exchanger, and a baffle plate; the sawtooth-shaped zigzag finned tube heat exchanger assembly is sawtooth-shaped on the cross section perpendicular to the long side of the fin. The side of the cross section of the external heat exchanger perpendicular to the long side of the fins is the air inlet side of the heat exchanger, and the other side is the air outlet side of the heat exchanger; the air outlet side belongs to the negative pressure chamber area of ​​the external heat exchanger. The incident surface of the airflow is each finned tube heat exchanger in the external heat exchanger. The angle between the airflow and the tip of each finned tube heat exchanger is an obtuse angle β. The obtuse angle β is 97.5° to 145°. The 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 two finned plates at the front and rear of the finned tube 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 a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 1, characterized in that, The centrifugal fan is a backward-inclined external rotor centrifugal fan.

3. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 1, characterized in that, The air outlet of the exhaust chamber is located in the middle or lower part of the exhaust chamber panel.

4. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 3, characterized in that, The air outlet includes a horizontal or vertical strip-shaped air outlet, which is located in the middle or lower part of the exhaust cavity panel.

5. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 1, characterized in that, An exhaust section is provided at the air outlet.

6. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 5, characterized in that, The exhaust section is equipped with several guide vanes; the guide vanes are arranged 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.

7. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in claim 1, characterized in that, The side of the negative pressure chamber and exhaust chamber of the external heat exchanger is provided with a compressor chamber for housing the fluorine circuit assembly, including the compressor, gas-liquid separator, four-way valve, expansion valve and electrical box.

8. The air conditioning unit with a small-area exhaust port in the wall exhaust cavity of the front-mounted fan as described in 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.

9. An air conditioning unit equipment platform, characterized in that, The air conditioning unit according to any one of claims 1 to 8 is installed inside the outer corridor-type equipment platform, and the air outlet of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

10. The air conditioning unit equipment platform according to claim 9, characterized in that, An exhaust section is provided at the air outlet; the exhaust section is located adjacent to the louvers on the exterior facade of the outer corridor-type equipment platform.

11. The air conditioning unit equipment platform according to claim 9, characterized in that, An exhaust section is provided at the air outlet; the louvers on the exterior facade of the outer corridor-type equipment platform are provided with an opening structure 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.

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