A fan rear single air duct double refrigeration system fusion host and equipment platform

Abstract

The application belongs to the technical field of building air conditioners, and discloses a fan rear single-air-duct double-refrigeration-system fusion host computer, which comprises a shell, at least two groups of refrigerant circulation systems and an exhaust cavity; the two groups of refrigerant circulation systems share an outer heat exchanger negative pressure cavity; the outer heat exchanger negative pressure cavity is composed of an outer heat exchanger, part of the shell and a back plate; a plurality of exhaust outlets of the outer heat exchanger negative pressure cavity are arranged on the back plate, and a fan is arranged at the exhaust outlet; the exhaust outlet is communicated with the exhaust cavity; and an air outlet of the exhaust cavity is arranged on the same side of an air inlet of the shell. The application constructs an outer heat exchanger assembly air path of a low-resistance through equipment platform outer facade louver; innovates an outer heat exchanger assembly structure, and improves the energy density of the fusion host computer body. After heat exchange, the air is constrained and induced by the guide plate piece group in the lateral exhaust section, and is laterally and rapidly ejected to the outer space of the fusion host computer, so that the exhaust airflow is prevented from flowing back to the host computer equipment platform.

Description

Technical Field

[0001] This invention belongs to the field of architectural design technology, and in particular relates to a fan-mounted single-duct dual-cooling system integrated host and equipment platform. Background Technology

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

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

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

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

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

[0007] ② Redundant allocation of equipment resources

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

[0009] In a confined space on the equipment platform, configuring two physically independent systems with the same principle and similar structure—an air conditioning and water heater fusion unit and a heat pump water heater—is a duplication of refrigeration equipment resources and a waste of those 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 technical problems, this invention provides a fusion host for a fan-mounted single-duct dual-cooling system;

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

[0015] Another objective of this invention is to provide a device platform for assembling a dual-cooling system integrated host with a rear-mounted fan and a single-duct dual-cooling system.

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

[0017] A fan-mounted single-duct dual-refrigeration system integrated host includes a housing, at least two refrigerant circulation systems disposed within the housing, and an exhaust chamber; the refrigerant circulation system includes an external heat exchanger and a compressor; the refrigerant circulation system shares a common external heat exchanger and an external heat exchanger negative pressure chamber;

[0018] The negative pressure chamber of the external heat exchanger is composed of an external heat exchanger, a part of the shell and a back plate; the back plate is provided with a number of exhaust ports for the negative pressure chamber of the external heat exchanger, the exhaust ports are equipped with fans, the exhaust ports are connected to the exhaust chamber, and the air outlet of the exhaust chamber is located on the same side as the air inlet of the shell; the external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger.

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

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

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

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

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

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

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

[0026] Furthermore, one side of the cross-section of the external heat exchanger perpendicular to the long side of the fins 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 airflow is each flat finned tube heat exchanger, and the angle between the airflow and the tip of each fin is an obtuse angle; the obtuse angle β is 97.5°~145°; the airflow impacts the tip of each fin at an obtuse angle β, is reflected by the fin tip, enters 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 two finned plates on the air inlet section of the flat plate finned tube heat exchanger.

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

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

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

[0032] Furthermore, the flat-plate finned tube heat exchanger includes finned plates and heat exchange tubes; several finned plates that are parallel to each other and spaced at a certain distance form a fin group; heat exchange tubes are inserted in a direction perpendicular to the finned plates; at least two groups of heat exchange tubes inserted in the finned plates are arranged in parallel side by side along the short side of the finned plates; the heat exchange tubes in the heat exchange tube groups are arranged in the long side of the finned plates; the parallel heat exchange tube groups are connected to compressors of different refrigerant circulation systems; the fins between each heat exchange tube group are continuous and complete, forming fin thermal bridges in the lateral and vertical directions of the fins.

[0033] Furthermore, heat exchanger tube groups in the same row can be connected in parallel to the refrigerant piping of the same refrigeration system; or, the relative positions of the heat exchanger tubes of different heat exchanger tube groups on the finned plate can be interchanged and arranged in a cross pattern.

[0034] Furthermore, at least two sets of heat exchange tube assemblies installed on the finned plates are heat exchange tube assemblies for air conditioning systems.

[0035] Furthermore, of the at least two heat exchange tube assemblies installed in the finned plate, at least one heat exchange tube assembly is an air source water heater heat exchange tube assembly.

[0036] Furthermore, the finned plate includes at least three sets of heat exchange tubes for the air conditioning system, with the air source water heater heat exchange tubes located between adjacent heat exchange tubes for the air conditioning system.

[0037] 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.

[0038] Preferably, the cross-section of the sawtooth-shaped finned tube heat exchanger assembly perpendicular to the long side of the fin is N-shaped, or it is a W-shaped structure consisting of a V-shaped finned tube heat exchanger perpendicular to the long side of the fin, a baffle plate, and a flat plate finned tube heat exchanger; or it is a structure consisting of a V-shaped finned tube heat exchanger, two baffle plates, and two flat plate finned tube heat exchangers.

[0039] Preferably, the angle γ between the partition and the flat finned tube heat exchanger is 0.5α; the angle ε between the partition and the V-shaped finned tube heat exchanger is 0.5α.

[0040] The heat exchange tubes of the serrated zigzag finned tube heat exchanger assembly are parallel to the serrated edges; the fins of the finned tube heat exchanger are orthogonally fitted onto the heat exchange tubes.

[0041] 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.

[0042] The heat exchange tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0043] 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.

[0044] Preferably, the heat exchange tube forms an obtuse angle with the sidewall of the negative pressure chamber of the adjacent external heat exchanger.

[0045] 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-curved external rotor centrifugal fan.

[0046] Preferably, the back panel is provided with 2, 4 or 6 exhaust vents; each exhaust vent is equipped with a fan, forming a fan wall.

[0047] Furthermore, the exhaust cavity is a cavity with a unidirectional air outlet, including a vertical exhaust cavity, or composed of interconnected vertical and horizontal exhaust cavities; or composed of interconnected vertical and lateral exhaust cavities; wherein, the horizontal exhaust cavity is located below the bottom plate of the negative pressure cavity of the external heat exchanger or above the top plate of the negative pressure cavity of the external heat exchanger. The lateral exhaust cavity is located on the outer side of the side plate of the negative pressure cavity of the external heat exchanger.

[0048] Furthermore, an exhaust section is provided at the air outlet. Furthermore, a plurality of guide vanes are provided within the exhaust section; the guide vanes are arranged parallel to or nearly parallel to the louvers, or the guide vanes are arranged vertically and have an angle to guide the exhaust airflow away from the air conditioning unit.

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

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

[0051] Furthermore, a compressor chamber is provided on the rear side of the back plate of the exhaust cavity or on the outer side of the negative pressure cavity wall 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.

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

[0053] An equipment platform, wherein the fan-mounted single-duct dual-cooling system fusion host 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.

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

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

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

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

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

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

[0060] ① Construct an external heat exchanger air path with high heat exchange intensity to improve the energy density of the air conditioning unit.

[0061] This invention utilizes a fin planer to progressively plan the airflow into the main body, causing the airflow lines to enter and exit the fin gaps in a zigzag pattern within a plane perpendicular to the long side of the fins. This generates local resistance, including airflow impact at the fin tips causing bends, increased flow cross-section within the fin gaps leading to airflow deceleration, and accelerated flow at bends out of the fin gaps. The local resistance to airflow entering and exiting the fin gaps is significantly greater than the resistance of the inlet section before and the outlet section after the finned tube heat exchanger assembly, making the "throttling" effect of the fin gaps on the airflow more pronounced. This improves the ventilation and heat transfer intensity and uniformity of the finned tube external heat exchanger assembly surface. This invention utilizes a medium-speed airflow intake → progressively decelerated airflow through fin planer cutting in the external heat exchanger assembly's airflow path → In the chain process of heat exchange on a huge finned heat exchange area on the total ventilation surface → heat collection and acceleration → fan pressurization → high-speed discharge of the exhaust section, the fan is used as the power source and a huge number of continuously arranged V-shaped heat exchanger fin planers are used as the core to construct a high-efficiency heat exchange airflow structure inside the dual refrigeration system integrated host, which improves the energy density of the external heat exchanger assembly and the integrated body. In this embodiment, 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 planers in this embodiment both improve the convective heat transfer coefficient by increasing the necessary flow resistance.

[0062] In this invention, the centrifugal fan is arranged vertically, with the air inlet directly facing the external heat exchanger assembly. 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. Because this embodiment overcomes the problem of uneven vertical ventilation and heat exchange in traditional multi-split air conditioners, the height of the external heat exchanger can be increased from the traditional design of about 1200mm in multi-split air conditioners to over 2000mm, further improving the energy density of the dual-refrigeration system integrated host.

[0063] ② Utilize longitudinal and transverse thermal bridges in the fins to improve the energy efficiency ratio during independent operation.

[0064] This invention uses a horizontal V-shaped finned tube heat exchanger or a sawtooth-shaped zigzag finned tube heat exchanger assembly as the basic unit of the air conditioner host external heat exchanger assembly. The two flat plate finned tube heat exchangers constituting the horizontal V-shaped finned tube heat exchanger include multiple refrigerant branches of multiple refrigeration systems of air conditioner air source water heaters. Multiple refrigerant branches share a set of fin groups. A set of fin groups includes several parallel fins.

[0065] The present invention relates to an external heat exchanger of an air conditioner or air source water heater refrigeration system in operation. Through the lateral thermal bridge effect of the fins, it can utilize the fin heat exchange area of ​​the external heat exchanger of the air source water heater or air conditioner refrigeration system in a non-operational state, thereby enlarging the fin heat exchange area of ​​the heat exchanger in the operating system. This achieves the technical effects of increasing evaporation pressure, reducing condensation pressure, reducing compressor exhaust temperature, increasing cooling and heating power, and improving energy efficiency ratio.

[0066] The advantages of this invention, which uses a fan-mounted single-duct dual-cooling system integrated host equipment platform, are:

[0067] ①Reduce the number of equipment, simplify the spatial structure of equipment platforms, and reduce the floor space required.

[0068] This invention integrates 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 integrated 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 simply moving it to 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 air conditioner unit installation and also reducing the amplification and diffusion of air conditioner unit vibration and noise within the louvers through hard connections.

[0069] 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.

[0070] 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.

[0071] ② A perfect unity was achieved between the decorative appearance of the facade and the excellent thermal performance of the air conditioning unit.

[0072] Because of the modernization and fashion of architecture, because of the pursuit of visual effects of building facades by architects and owners, because of the whole society's love for "architecture is frozen music", and because of the function of louvers in sheltering from wind and rain and preventing wind, frost, snow and ice from corroding the equipment platform and air conditioning unit, the installation method of using louvers to hide the air conditioning unit on the equipment platform will become widespread and solidified. The problems of the classic "rear inlet and front exhaust" air duct of the air conditioning unit's external heat exchanger being obstructed and suppressed by louvers, resulting in increased exhaust static pressure, reduced air volume, and serious degradation of the heat exchange performance of the external heat exchanger are unavoidable.

[0073] When the air conditioning unit on the equipment platform of this invention is running, the exhaust airflow passes through the louvers on the exterior facade and enters the ambient atmosphere with a long range and good diffusion and dilution effect. The thermal performance of the air conditioning unit on the equipment platform is not reduced compared with the laboratory data, and the air conditioner completes its task as a "heat transporter" with high quality and high efficiency.

[0074] This invention eliminates the obstruction of the airflow to the external heat exchanger of the air conditioning unit by the louvers, effectively opens the airflow path of the external heat exchanger, and ensures the thermal performance of the air conditioning unit. At the same time, it maintains the decorative appearance of the louver facade, achieving 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

[0075] Figure 1 This is a top view of the airflow path of the external heat exchanger of a central air conditioning unit with a rear-inlet and front-outlet airflow. Due to the obstruction of the airflow by the louvers on the equipment platform, the static pressure of the outlet air increases, the airflow decreases, and some of the outlet air flows back to the air inlet.

[0076] Figure 2 This is a three-dimensional sectional view of the integrated host unit of the fan-mounted single-duct dual-cooling system in Example 1;

[0077] Figure 3 This is a vertical sectional view of the fusion host unit with a horizontal V-shaped finned tube heat exchanger continuously arranged and a centrifugal fan arranged vertically, as shown in Example 1.

[0078] Figure 4 This is a horizontal sectional view of the fusion host unit in Example 1, which features a horizontally arranged V-shaped finned tube heat exchanger with a continuously arranged centrifugal fan and a vertically arranged centrifugal fan.

[0079] Figure 5 This is a vertical sectional view of the airflow operation of the fan-mounted single-duct dual-cooling system integrated with the host unit in Example 1;

[0080] Figure 6 This is a schematic diagram of the integrated host system of the fan-mounted single-duct dual-cooling system in Example 1;

[0081] Figure 7 This is a three-dimensional structural diagram of a horizontal cross-section V-shaped finned tube heat exchanger assembly.

[0082] Figure 8 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.

[0083] Figure 9 This is a schematic diagram of the finned transverse and longitudinal thermal bridges of the multi-branch dual-system flat finned tube heat exchanger in Example 1. The left and right sides are two branches of two refrigeration systems.

[0084] Figure 10 This is a schematic diagram of the flat plate finned tube heat exchanger structure for each of the three branches of the dual refrigeration system in Example 1.

[0085] Figure 11 This is a schematic diagram of the transverse and longitudinal thermal bridges of the multi-branch dual-system flat plate finned tube heat exchanger in Example 2, i.e., a partial enlarged view of the three-row finned tube heat exchanger.

[0086] Figure 12 This is a schematic diagram of an air conditioning system with an intermediate heat exchanger that produces air conditioning water for the indoor unit, as shown in Example 3.

[0087] Figure 13 This is a top view of the integrated host structure of the fan-mounted single-duct dual refrigeration system with a sawtooth-shaped finned tube heat exchanger assembly in Example 4.

[0088] Figure 14 This is a top view of the airflow of the combined main unit in Example 4, which uses a sawtooth-shaped finned tube heat exchanger assembly with a fan-mounted single-duct dual-refrigeration system.

[0089] Figure 15 This is a vertical sectional view of the airflow operation of the integrated host equipment platform of the fan with a convex exhaust section and a single air duct dual cooling system after the fan in Example 5.

[0090] Figure 16 This is a diagram showing the distribution of the air inlet and exhaust areas on the exterior of the equipment platform of the integrated host unit of the fan-mounted single-duct dual-cooling system with an outwardly protruding exhaust section in Example 5.

[0091] Figure 17 The equipment platform of Example 6 adopts a single air duct dual cooling system with rear-mounted top air outlet and integrated main unit airflow operation vertical sectional view;

[0092] Figure 18 Top view of the combined air conditioning and water heater unit, showing the lateral drift of the exhaust airflow from the rear-mounted fan wall.

[0093] Figure 19 A top view of the airflow operation of the combined air conditioning and water heater unit, showing the lateral drift of the exhaust airflow from the rear-mounted fan wall.

[0094] Figure 20 A top-down view of the airflow operation of the integrated air conditioning and water heater main unit platform, showing the lateral drift of the exhaust airflow from the rear-mounted fan wall.

[0095] Figure 21 A schematic diagram showing the distribution of the air inlet and exhaust surfaces on the exterior of the equipment platform of the combined air conditioning and water heater unit during summer operation, with the exhaust airflow laterally drifting from the rear-mounted fan wall.

[0096] Figure 22 A schematic diagram showing the vertical airflow of the building converging and moving upwards during summer operation of the combined air conditioning and water heater unit, with the air conditioner platform equipped with a rear-mounted fan for side exhaust airflow. Detailed Implementation

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] Example 1

[0102] like Figures 2-8 As shown, a fan-mounted single-duct dual-refrigeration system integrated host includes a housing 1, two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber 3.

[0103] The refrigerant circulation system includes an external heat exchanger 2 and a compressor 4; the refrigerant circulation system shares an external heat exchanger 2 and an external heat exchanger negative pressure chamber 22;

[0104] The negative pressure chamber 22 of the external heat exchanger is composed of an external heat exchanger 2, a part of the shell and a back plate 21;

[0105] The back plate 21 is provided with four exhaust ports 23 for the negative pressure chambers 22 of the external heat exchangers. Each exhaust port 23 is equipped with a fan 24, forming a fan wall.

[0106] The exhaust cavity 3 is a cavity with a one-way air outlet 31, which is composed of a vertical exhaust cavity and a horizontal exhaust cavity that are interconnected; wherein, the horizontal exhaust cavity is located below the bottom plate of the negative pressure cavity 22 of the external heat exchanger.

[0107] The exhaust port 23 is connected to the exhaust cavity 3. The air outlet 31 of the exhaust cavity 3 is located on the same side as the air inlet 11 of the shell. The air outlet 31 of the exhaust cavity 3 faces the short side of the shell. The external heat exchanger 2 is the air inlet of the negative pressure cavity 22 of the external heat exchanger.

[0108] The fan 24 is located inside the exhaust chamber 3. The fan 24 is a backward-inclined external rotor centrifugal fan.

[0109] The rear side of the back panel of the exhaust chamber 3 is provided with a compressor chamber 4 for housing the refrigerant circuit assembly, including the compressor 41, gas-liquid separator, four-way valve, expansion valve and electrical box.

[0110] The exhaust port 31 of the exhaust chamber is connected to the exhaust section 33, which fits the louver structure of the equipment platform's exterior facade.

[0111] In this embodiment, the connection between the air outlet 31 of the exhaust chamber and the exhaust section 33 that fits the louver structure of the equipment platform facade can be achieved by riveting or by flange connection.

[0112] A swooping exhaust section 33 is installed at the air outlet 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.

[0113] The deflector plate 34 is used to constrain and guide the direction of the exhaust airflow and connects to the louvers on the exterior facade.

[0114] When the air conditioning unit in this embodiment is running, the exhaust airflow, which is pressurized by the centrifugal fan and sent into the exhaust chamber, is ejected at high speed (about 8m / s) from the air outlet and enters the diving exhaust section 33. Under the constraint and guidance of the multiple guide plates 34 set in the diving exhaust section 33, the exhaust airflow rays are parallel or nearly parallel to the louver slats. The louver slats have the smallest interception area and the lowest interception resistance for the exhaust airflow. The exhaust airflow passes through the louver slats on the outer facade of the equipment platform and is discharged at high speed into the external atmosphere, achieving long-range diffusion and dilution.

[0115] like Figure 9-10As shown, the 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 heat exchange tubes 115 are inserted in a direction perpendicular to the plane of the finned plates 110.

[0116] Two sets of heat exchange tubes 116 are arranged in parallel side by side along the short side of the finned plate 110.

[0117] The heat exchange tubes 115 in the heat exchange tube assembly 116 are arranged along the long side of the finned plate 110.

[0118] like Figure 12 As shown, in this embodiment, four sets of heat exchange tubes 116 are arranged along the long side of the finned plate 110.

[0119] The heat exchange tube assemblies 116 are arranged side by side and connected to different compressors 4. That is, the two ends of the heat exchange tube assembly I 117 are respectively connected to the refrigerant liquid pipe 112 and the refrigerant gas pipe 113 of the air conditioning compressor I 121.

[0120] Heat exchanger tube assembly II118 is connected to the refrigerant liquid pipe 111 and refrigerant gas pipe 114 of the compressor II122 of the air source water heater.

[0121] like Figure 9 As shown, the heat exchange tube group 116 in the same row is connected in parallel to the refrigerant pipeline of the same compressor 4.

[0122] That is, heat exchanger tube group I 117 and heat exchanger tube group III 119 in the same row are connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of the air conditioning compressor I.

[0123] The heat exchanger tube group II 118 and heat exchanger tube group IV 120 in the same row are connected to the refrigerant liquid pipe 111 and refrigerant gas pipe 114 of the compressor II of the air source water heater.

[0124] In this embodiment, the heat exchange tube groups 116 are arranged side by side and connected to different compressors. The finned tube heat exchanger 37 in operation can utilize the fin heat exchange area of ​​the finned tube heat exchanger in the refrigeration system in the non-operational state through the lateral thermal bridge effect of the fins, thereby increasing the fin heat exchange area of ​​the heat exchanger in the operating system, achieving increased evaporation pressure, decreased condensation pressure, decreased compressor discharge temperature, increased refrigeration and heating power, and improved energy efficiency ratio.

[0125] like Figure 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.

[0126] like Figure 8 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.

[0127] 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.

[0128] 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.

[0129] The apex angle α of the V-shaped finned tube heat exchanger is 15° to 110°.

[0130] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 90°.

[0131] As an optional implementation, the apex angle α of the V-shaped finned tube heat exchanger is 30° to 60°.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger;

[0136] 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.

[0137] 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.

[0138] like Figure 3-5 As shown, in this embodiment, the air inlet 11, the external heat exchanger 2, the negative pressure chamber 22 of the external heat exchanger, the fan 24, the exhaust chamber 3 and the air outlet 31 constitute an air inlet and outlet path with the external heat exchanger in front and the fan and exhaust chamber behind.

[0139] This embodiment presents a fan-mounted single-duct dual-refrigeration system integrated host, which creatively reconstructs the structure of the external heat exchanger, the external heat exchanger air duct structure, and the air conditioning host structure of a household air conditioning host, creating conditions for the integration of the air conditioning host and the equipment platform.

[0140] ① Innovative structural design of air conditioning unit

[0141] Compared with classic household air conditioner main units and air source water heater main units, the characteristics of the fan-mounted single-duct dual-refrigeration system integrated main unit in this embodiment are: adopting a V-shaped finned tube heat exchanger assembly with a horizontal cross-section and ultra-large heat exchange area; the refrigerant pipeline of the external heat exchanger corresponds to the two independent refrigeration systems of air conditioner and air source water heater, and the two refrigerant pipelines are thermally connected through the longitudinal and transverse thermal bridges of the flat finned tube fins.

[0142] The horizontal cross-section V-shaped finned tube heat exchanger assembly in this embodiment is composed of at least two 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;

[0143] In this embodiment, within the limited space of the integrated host unit of the single-duct dual-refrigeration system behind the fan, a horizontal cross-section V-shaped finned tube heat exchanger assembly is set parallel to the air inlet 11. The assembly unfolds along the air inlet surface of the horizontal cross-section V-shaped finned tube heat exchanger assembly to obtain a large-area external heat exchanger ventilation surface. Further unfolding on this large external heat exchanger ventilation surface creates a huge finned heat transfer surface, thereby effectively increasing the total heat transfer area S of the fins of the external heat exchangers of the air conditioning unit and the air source water heater unit, reducing the heat transfer temperature difference Δt of the external heat exchanger body, increasing the evaporation pressure and reducing the condensation pressure, and improving the cooling capacity Q and energy efficiency ratio COP of the air conditioning system and the air source water heater system.

[0144] The negative pressure chamber 22 of the external heat exchanger in this embodiment is composed of a bottom plate (i.e., the bottom plate of the shell 1), a side plate, a back plate, an external heat exchanger, and a top plate (i.e., the top plate of the shell 1).

[0145] An external heat exchanger 2 is positioned laterally on the back plate 21. An exhaust port 23 for the negative pressure chamber 22 of the external heat exchanger is located on the back plate 21. An intake port for a backward-curved external rotor centrifugal fan is installed on the exhaust port 23; the intake port of the backward-curved external rotor centrifugal fan faces the external heat exchanger 2. The laterally arranged heat exchanger serves as the air inlet 11 for the negative pressure chamber of the external heat exchanger. An exhaust chamber 3 for the centrifugal fan is located outside the back plate 21 of the negative pressure chamber 22. The outlet 31 of the exhaust chamber 3 connects to a downward-sloping exhaust section 33, conforming to the louver structure of the equipment platform's exterior facade.

[0146] In this embodiment, a compressor chamber 4 is provided on the rear side of the back plate of the exhaust chamber 3, where two sets of refrigerant circulation system compressors 41, four-way valves, expansion valves and other fluorine circuit components, as well as electrical components such as electrical boxes, are installed in the main unit of the fan-mounted single-duct dual refrigeration system.

[0147] In this embodiment, the connection between the exhaust vent 31 and the swooping exhaust section that fits the louver structure of the equipment platform facade can be achieved by riveting or by flange connection.

[0148] ②Innovative airflow path structure for external heat exchangers

[0149] In this embodiment, the external heat exchanger 2, the air inlet 11, the negative pressure chamber 22, the fan wall, the exhaust chamber 3 and the exhaust outlet 31 are arranged in a progressive layout to construct an external heat exchanger air inlet and outlet path with short path, low resistance, large air volume and high heat exchange intensity.

[0150] During ventilation and heat exchange in this embodiment, the external heat exchanger 2 operates from the air inlet 11 to the air outlet 31, powered by a centrifugal fan. The heat exchange airflow undergoes two static-dynamic pressure conversions. The first static-dynamic pressure conversion enables high-speed intake of airflow from the centrifugal fan's suction port, and the second static-dynamic pressure conversion enables high-speed exhaust of airflow from the exhaust port 31 of the exhaust chamber 3. Furthermore, the airflow lines between the fins 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 2 in this embodiment.

[0151] In this embodiment, the airflow field of the external heat exchanger is established by the operation of four centrifugal fans on the fan wall: the four centrifugal fans on the vertically set centrifugal 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 main unit at a medium speed (about 4 m / s) from the air inlet of the main unit. The airflow is dispersed and slowed down by planing the airflow through multiple fins. It flows through the gaps between the fins of the external heat exchanger at a low speed (below 2 m / s) to complete heat exchange. Then it enters the negative pressure chamber 22 of the external heat exchanger, and then converges and accelerates. The airflow flows at high speed into the centrifugal fan suction port with the lowest pressure (negative gauge pressure) in the entire path, completing the first static pressure to dynamic pressure conversion of the air. The high-speed heat exchange airflow flowing into the centrifugal fan's intake port is pressurized by the centrifugal fan and sent into the exhaust chamber 3, which is under positive pressure relative to the atmospheric environment. It then exits at high speed from the outlet 31 and enters the diving exhaust section 33. Under the constraint and guidance of multiple diving guide plates 34 installed in the diving exhaust section 33, the exhaust airflow is parallel or nearly parallel to the louvers on the outer facade of the equipment platform. The louver assembly minimizes the interception area and resistance of the exhaust airflow, allowing the low-resistance, high-speed exhaust airflow to pass through the louver assembly and exit at high speed (approximately 8 m / s) into the external atmosphere, achieving long-range diffusion and dilution. In this embodiment, the heat exchange airflow, from the main unit's inlet 11 to the outlet 31, is powered by the centrifugal fan and undergoes two static-dynamic pressure conversions, achieving high-speed intake by the centrifugal fan and high-speed exhaust from the exhaust chamber.

[0152] In this embodiment, when the fan is mounted on a single duct and the dual refrigeration system is integrated with the host, the microscopic process of airflow entering and exiting the fin gap and flowing at low speed in the fin gap is the key link in the airflow field of the external heat exchanger 2.

[0153] 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 fins behind the gap. The fins behind the gap act as "planers," "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 fins behind the gap at an obtuse angle. After being reflected by the fins 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 of the external heat exchanger, overcomes the resistance of the fin gap channel, and flows 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 then converges and is discharged at the HH section.

[0154] This embodiment achieves a large-span structural innovation in the air inlet and exhaust airflow paths of the external heat exchanger 2.

[0155] In this embodiment, the air path is a single channel and a downward-facing exhaust section is adopted. The two refrigeration systems can operate independently, that is, the two refrigeration systems can operate synchronously or asynchronously.

[0156] Example 2

[0157] Both this embodiment and Embodiment 1 utilize longitudinal and transverse thermal bridges in the fins to increase the heat exchange area of ​​the external heat exchanger fins in a standalone refrigeration system, thereby improving heat exchange intensity and energy efficiency ratio. The difference in this embodiment is:

[0158] The finned tube heat exchanger used in this embodiment, such as Figure 11 As shown,

[0159] The 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 heat exchange tubes 115 are installed in a direction perpendicular to the plane of the finned plates 110.

[0160] Three sets of heat exchange tubes 116 are arranged in parallel along the short side of the finned plate 110, one of which is an air source water heater heat exchange tube set 128.

[0161] The heat exchange tubes 115 in the heat exchange tube assembly 116 are arranged along the long side of the finned plate 110.

[0162] The finned plate 110 includes four sets of heat exchange tube groups I 117, II 118, and IV 120 for air conditioning systems. The heat exchange tube group 128 of the air source water heater is located between adjacent heat exchange tube groups for air conditioning systems, and the fins between each heat exchange tube group form thermal bridges in the transverse and longitudinal directions.

[0163] The two ends of heat exchanger tube assembly I117 and heat exchanger tube assembly II118 are respectively connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of air conditioning compressor I121.

[0164] The heat exchange tube assembly 128 of the air source water heater is connected to the refrigerant liquid pipe and refrigerant gas pipe of the air source water heater compressor Ⅲ 129 respectively.

[0165] The heat exchange tube group 116 in the same row is connected in parallel to the refrigerant pipeline of the same air conditioning compressor.

[0166] Heat exchanger tube group I 117 and heat exchanger tube group III 119 in the same row are connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of the air conditioning compressor I.

[0167] Heat exchanger tube group II 118 and heat exchanger tube group IV 120 in the same row are connected to the refrigerant liquid pipe 112 and refrigerant gas pipe 113 of the air conditioning compressor I.

[0168] The horizontal cross-section V-shaped finned tube heat exchanger assembly is composed of four finned tube heat exchangers 37 in this embodiment.

[0169] The cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly perpendicular to the fin 110 is a broken line type; the long side of the finned tube heat exchanger 37 is set in the vertical direction or close to the vertical direction.

[0170] In this embodiment, the cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly perpendicular to the fin 110 is W-shaped, and it is composed of two V-shaped finned tube heat exchangers 40 arranged continuously.

[0171] The apex angle α of the V-shaped finned tube heat exchanger is 15° to 90°.

[0172] In this embodiment, the integrated structure of the air conditioner unit and air source water heater unit combined finned tube heat exchanger assembly adopts a combination of two horizontal V-shaped finned tube heat exchangers. Each V-shaped finned tube heat exchanger is composed of two flat plate finned tube heat exchangers. Each flat plate finned tube heat exchanger includes three rows of heat exchange tubes. The two rows of heat exchange tubes on the inner and outer sides belong to the external heat exchanger of the air conditioner unit, and the middle row of heat exchange tubes belongs to the external heat exchanger of the air source water heater unit. The fins are complete and continuous, and the lateral and longitudinal thermal bridges of the fins are complete and continuous.

[0173] This embodiment improves the cooling energy efficiency ratio (EER) of the air conditioning system when operating independently by utilizing the heat transfer area of ​​the fins near the middle heat exchanger tube group in the air source water heater, through the use of the inner and outer heat exchanger tube groups in the external heat exchanger of the air conditioning system. It also significantly improves the EER of the air source water heater system when operating independently, by utilizing the heat transfer area of ​​the fins near the inner and outer heat exchanger tube groups in the middle heat exchanger tube group of the air conditioning system. Although the power of an air source water heater is usually less than that of a residential central air conditioning unit, the demand for hot water for household bathing, cooking, and laundry is continuously increasing with the evolution of lifestyles and hygiene habits, even during spring and autumn when air conditioning is rarely used. Therefore, this embodiment's significant improvement in the EER of the air source water heater system is of great importance.

[0174] Example 3

[0175] like Figure 12 As shown, both this embodiment and Embodiment 1 utilize longitudinal and transverse thermal bridges in the fins to increase the heat exchange area of ​​the external heat exchanger fins in a stand-alone refrigeration system.

[0176] The dual cooling system in this embodiment is used for both air conditioning and air source water heater.

[0177] The difference in this embodiment is that an intermediate heat exchanger 6 is provided in the compressor cavity 4 of the air conditioning unit, and the two heat exchange medium channels of the intermediate heat exchanger 6 are the refrigerant channel and the air conditioning water channel, respectively.

[0178] 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.

[0179] 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.

[0180] This embodiment is a fan-mounted single-duct dual-refrigeration system integrated host. On the refrigerant side, the compressor drives the refrigerant to circulate in a closed loop. During the refrigerant circulation process, high-efficiency phase change heat change is achieved, which is coupled with the evaporator in the low-temperature air of the air conditioning refrigeration system to absorb heat and the condenser in the high-temperature air to release heat, and the evaporator in the low-temperature air of the air source water heater heat pump system to absorb heat and the condenser in the high-temperature hot water of the water tank to release heat.

[0181] In this embodiment, a compressor chamber 4 is provided on the rear side of the back plate of the exhaust chamber 3, and two sets of refrigerant circulation system compressors 4, four-way valves, expansion valves, gas-liquid separators and other refrigeration circuit components, as well as power cables, signal lines and electrical boxes and other circuit components are installed. These refrigeration circuit components, along with external heat exchangers, refrigerant connecting pipes, indoor unit heat exchangers, and other components, form the air conditioning refrigerant circulation circuit and the air source water heater refrigerant circulation 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 refrigerant circulation circuit, establishes high and low pressure states of the refrigerant in the condenser and evaporator pipes, driving the refrigerant to circulate and undergo repeated phase changes in the refrigerant circulation circuit to achieve "heat transfer." That is, the air conditioning refrigeration system absorbs heat by evaporating liquid refrigerant in the evaporator pipes, and then absorbs heat from the low-temperature ambient air flowing between the fins through the large heat absorption area of ​​the copper pipes. Conversely, the high-temperature, high-pressure refrigerant gas releases heat by condensing in the condenser pipes, and then releases heat to the high-temperature ambient air flowing between the fins through the large heat release area 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.

[0182] The air source heat pump water heater cooling system absorbs heat by evaporating liquid refrigerant in the evaporator pipes, and then absorbs heat from the ambient air flowing between the fins through the large heat absorption area of ​​the copper pipes. The heat is then released by condensing high-temperature, high-pressure refrigerant gas in the condenser 71 pipes in the water tank 7, thus realizing the transfer of heat from the ambient air where the water heater evaporator is located to the high-temperature hot water environment where the condenser is located.

[0183] This embodiment has all the advantages of embodiments 1-2. 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.

[0184] Example 4

[0185] like Figure 13-14 As shown, this embodiment has the same principle and structure as Embodiment 1, both being dual refrigeration system integrated host with the external heat exchanger assembly and negative pressure chamber in the front and the centrifugal fan and exhaust chamber in the rear.

[0186] 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 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.

[0187] The angle γ between the baffle and the flat-plate finned tube heat exchanger is 0.5α;

[0188] The angle ε between the baffle and the V-shaped finned tube heat exchanger is 0.5α.

[0189] The serrated zigzag finned tube heat exchanger assembly has a serrated shape on the cross-section perpendicular to the long side of the fins.

[0190] The heat exchange tubes of the serrated zigzag finned tube heat exchanger assembly are parallel to the serrated edges; the finned plate assemblies of the finned tube heat exchanger are orthogonally fitted onto the copper tubes.

[0191] 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.

[0192] The heat exchange tubes are parallel or nearly parallel to the upper and lower base plates, and obliquely intersecting with the left and right side plates.

[0193] 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.

[0194] The heat exchange tube forms an obtuse angle with the side wall of the negative pressure chamber of the adjacent external heat exchanger.

[0195] 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.

[0196] Example 5

[0197] like Figure 15-16 As shown, an equipment platform is provided, in which a fan-mounted single-duct dual-cooling system fusion host is installed in an outer corridor-type equipment platform, and the air outlet 31 of the exhaust chamber 3 faces the outer facade of the outer corridor-type equipment platform.

[0198] The air conditioning unit of this embodiment is similar to that of Embodiment 1. The difference between the air conditioning unit of this embodiment and that of Embodiment 1 is:

[0199] The air outlet 31 is provided with a convex exhaust section 35 that is adapted to its shape; several guide plates 34 are provided inside the convex exhaust section 35.

[0200] The exterior louvers of the external corridor-type equipment platform 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 louvers. 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.

[0201] This embodiment has all the advantages of embodiment 3. 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.

[0202] Example 6

[0203] like Figure 17 As shown, both this embodiment and Embodiment 1 adopt an aerodynamic layout with the centrifugal fan mounted on the rear wall and arranged vertically, incorporating the main sections of the air inlet and exhaust channels of the external heat exchanger assembly into the main unit body.

[0204] The difference in this embodiment is that the exhaust chamber 3 is composed of a vertical exhaust chamber and a horizontal exhaust chamber that are interconnected, and the horizontal exhaust chamber is located above the top plate of the negative pressure chamber 22 of the external heat exchanger.

[0205] This embodiment uses a vertical air cavity for top air outlet and a top air cavity for horizontal air exhaust, which lowers the center of gravity of the fusion host, improves operational stability, and reduces operational vibration and noise.

[0206] The air outlet 31 is provided with an outwardly protruding exhaust section 35 that is adapted to its shape.

[0207] The exterior louvers of the external corridor-type equipment platform 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 louvers. 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.

[0208] Example 7

[0209] like Figure 18-22 As shown, in this embodiment, the compressor chamber of the combined air conditioning and water heater unit with the rear-mounted fan wall-side exhaust airflow drifts laterally. The compressor chamber is located on the rear side of the back panel of the exhaust chamber 3, that is, the compressor chamber is rear-mounted.

[0210] The dual cooling system in this embodiment is used for both air conditioning and air source water heater.

[0211] The exhaust chamber 3 is a cavity with a unidirectional air outlet, consisting of a vertical exhaust chamber and a side exhaust chamber that are interconnected. The air outlet 31 is connected to the side exhaust section 35, which has a side guide plate assembly. The guide plates 34 are vertically arranged and have an angle to guide the exhaust airflow away from the air conditioning unit, that is, the guide plate assembly points at a small angle to the side away from the air inlet of the unit.

[0212] In this embodiment, the equipment platform of the air conditioning and water heater integrated unit is provided with a rear fan wall side exhaust airflow side drifting. The exterior facade is provided with louvers 52. The louvers 52 are close to the side wall and have an opening structure 36 reserved to freely accommodate the side exhaust section. When installing the main unit, its side exhaust section is embedded into the opening structure 36 reserved in the louvers.

[0213] In this embodiment, when the combined air conditioning and water heater unit operates on the platform with the rear-mounted fan wall side-exhaust airflow drifting laterally, the positive pressure exhaust chamber of the combined air conditioning and water heater unit discharges the heat-exchanged air at high speed into the side exhaust section. Under the constraint and guidance of the guide plate group in the side 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. At the same time, it prevents the exhaust airflow from being sucked into the adjacent equipment platform below (in winter) or above (in summer) after being discharged from this equipment platform. When viewed vertically, the exhaust airflow of the combined air conditioning and water heater unit on several floors of the building drifts laterally at a small angle in the horizontal plane, and then gathers vertically in the space outside the rear side of 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 equipment platform.

[0214] In traditional high-rise buildings, especially high-rise residential buildings, during winter (summer) operation of the external heat exchanger to ventilate the ambient atmosphere, the equipment platform's exterior facade experiences a phenomenon where small exhaust areas with positive pressure and high-speed exhaust, while large intake areas with slight negative pressure and low-speed intake of ambient air, lead to the diffusion and dilution of exhaust air in the atmosphere, with some of the diluted exhaust air flowing back to the exterior facade. This causes cold (hot) air to adhere to the equipment platform's exterior facade, resulting in performance degradation of the air conditioning and water heater's integrated unit.

[0215] In winter, the cold air discharged from the heat exchangers on each equipment platform diffuses and dilutes in front of its facade and partially flows back. From a vertical perspective, the cold air discharged from multiple equipment platforms moves downward as a whole and converges, linking end to end, forming a chain, and the more it is chained, the more it covers the facade of the equipment platform. This causes the main unit of the lower equipment platform to draw in the cold air discharged from the air conditioning and water heater of the upper equipment platform, which reduces the evaporation temperature, reduces the refrigerant circulation, and deteriorates the heating performance of the main unit.

[0216] 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 and water heater fusion unit on the upper equipment platform to draw in the hot air discharged from the air conditioning and water heater fusion unit on the lower equipment platform, raising the condensing temperature, reducing the subcooling of the condensate, and deteriorating the cooling performance of the air conditioning and water heater fusion unit.

[0217] In this embodiment, after heat exchange, the air from each layer of the main equipment is constrained and guided by the guide plate group in the lateral exhaust section, and then drifts laterally at high speed to the outer space behind the compressor cavity. The exhaust airflow is separated from the space directly in front of the equipment platform, preventing the exhaust airflow from flowing back to the equipment platform. At the same time, it also prevents the risk of the exhaust airflow being sucked into the adjacent equipment platform below (in winter) or the adjacent equipment platform above (in summer) after being discharged from the equipment platform.

[0218] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fan-mounted single-duct dual-cooling system integrated host, characterized in that, It includes a housing, at least two sets of refrigerant circulation systems disposed within the housing, and an exhaust chamber; the refrigerant circulation system includes an external heat exchanger and a compressor; the at least two sets of refrigerant circulation systems share a negative pressure chamber of the external heat exchanger; The negative pressure chamber of the external heat exchanger is composed of a bottom plate, side plates, back plate, top plate, and the external heat exchanger. 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 back plate is provided with a plurality of exhaust ports for the negative pressure chambers of the external heat exchanger. Each exhaust port is equipped with a fan and is connected to the exhaust chamber. The exhaust port of the exhaust chamber is located on the same side as the air inlet of the shell. The external heat exchanger is the air inlet of the negative pressure chamber of the external heat exchanger. The external heat exchanger is a horizontal cross-section V-shaped finned tube heat exchanger assembly or a 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 V-shaped finned tube heat exchangers formed by bending flat plate finned tube heat exchangers; the cross-section of the horizontal cross-section V-shaped finned tube heat exchanger assembly perpendicular to the long side of the fin is 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. Each exhaust vent is equipped with a fan, forming a fan wall; The fans are arranged in the same vertical plane; The incident surface of the airflow is each finned tube heat exchanger, and the angle between the airflow and the tip of each fin is an obtuse angle. The airflow strikes the tip of each fin at an obtuse angle β and is reflected by the fin tip into the fin gap and flows to the negative pressure chamber of the outer heat exchanger. The obtuse angle β is 97.5° to 145°; The airflow rate entering each fin gap d is equal to the airflow intercepted by the vertical distance δ between the tips of the two finned plates on the air inlet section of the finned tube heat exchanger; δ=d·sinα / 2, where α is the apex angle of the V-shaped finned tube heat exchanger.

2. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 1, characterized in that, The finned tube heat exchanger includes finned plates and heat exchange tubes; a number of parallel finned plates spaced at a certain distance form a fin group. Heat exchange tubes are installed in a direction perpendicular to the finned plate; at least two sets of heat exchange tubes are installed in parallel along the short side of the finned plate; the heat exchange tubes in the heat exchange tube sets are arranged along the long side of the finned plate; the parallel heat exchange tube sets are connected to compressors of different refrigerant circulation systems; the fins between each heat exchange tube set are continuous and complete, forming fin thermal bridges in the transverse and vertical directions of the fins.

3. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 2, characterized in that, The heat exchanger tube groups in the same row are connected in parallel to the refrigerant piping of the same refrigeration system; or, the relative positions of the heat exchanger tubes of different heat exchanger tube groups on the finned plate are swapped left and right, and arranged in a cross pattern.

4. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 2, characterized in that, At least two sets of heat exchange tube assemblies are installed on the finned plates, both of which are heat exchange tube assemblies for air conditioning systems.

5. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 2, characterized in that, At least two sets of heat exchange tubes are installed in the finned plate, and at least one set of heat exchange tubes is an air source water heater heat exchange tube set.

6. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 4, characterized in that, The finned plate includes at least three sets of heat exchange tubes for the air conditioning system, and the heat exchange tubes of the air source water heater are located between adjacent heat exchange tubes for the air conditioning system.

7. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 1, characterized in that, The back panel is provided with at least two exhaust vents; the fan is a backward-inclined external rotor centrifugal fan.

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

9. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 7, characterized in that, An exhaust section is provided at the air outlet.

10. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 8, 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.

11. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 1, characterized in that, The outer side of the negative pressure chamber wall 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.

12. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 8, characterized in that, The rear side of the back plate of the vertical exhaust chamber is provided with a compressor chamber for housing the fluorine circuit assembly, which includes a compressor, a gas-liquid separator, a four-way valve, an expansion valve, and an electrical box.

13. The integrated host unit of the fan-mounted single-duct dual-cooling system according to claim 1, characterized in that, The fusion unit is also equipped with an intermediate heat exchanger, the two heat exchange medium channels of which are the refrigerant channel of the air conditioning unit and the air conditioning water channel, respectively; the refrigerant channel is connected to the refrigerant circuit of the air conditioning unit; and the air conditioning water channel is connected to the indoor heat exchanger of the air conditioning unit.

14. A device platform, characterized in that, The integrated host of the fan-mounted single-duct dual-cooling system according to any one of claims 1 to 13 is installed in the outer corridor-type equipment platform, and the air outlet of the exhaust cavity faces the outer facade of the outer corridor-type equipment platform.

15. The device platform according to claim 14, 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.

16. The device platform according to claim 14, characterized in that, An exhaust section is provided at the air outlet; the louvers on the exterior facade of the external corridor equipment platform are provided with an opening structure matching the exhaust section; the exhaust section is embedded in the louver opening structure.

17. The device 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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