Large air conditioning units and air conditioning units and building facade combination modules

Abstract

The present invention discloses a large air-conditioning unit adopting multi-point negative pressure exhaust in the inner cavity of a heat exchanger, comprising: a shell; an external heat exchanger, which is vertically arranged in the shell and extends along a plurality of adjacent side walls of the shell, and an air inlet and an air outlet are arranged on the side walls of the shell opposite to the external heat exchanger; the external heat exchanger and the partition plate and / or the wall surface of the shell are enclosed to form a closed heat exchange cavity; at least two centrifugal fans, whose air inlets are connected to the heat exchange chamber, and whose air outlets are connected to the air outlet on the shell; under the action of the centrifugal fans, outside air is drawn in from the multiple points of the heat exchange chamber; The air enters the shell through the air inlet on each side, then flows through the external heat exchanger for heat exchange and then enters the heat exchange chamber, and is finally discharged from the shell through the centrifugal fan and the air outlet; at least one internal heat exchanger, the internal heat exchanger adopts a plate heat exchanger or a shell and tube heat exchanger, and the water path of the internal heat exchanger is connected with the water path of the air-conditioning terminal in the building; at least one group of circulation modules for the circulation of refrigerant is arranged between the fluorine path of the external heat exchanger and the internal heat exchanger, and the water path of the internal heat exchanger exchanges heat with the fluorine path to produce the cold (hot) water required by the air-conditioning terminal in the building.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a large air conditioning unit adopting multi-point negative pressure exhaust in a heat exchanger cavity and a module combining the air conditioning unit and a building facade. Background Art

[0002] Although the number of high-rise buildings is increasing rapidly, the traditional building central air conditioning characterized by screw compressors and cooling towers has been declining; central air conditioning modules with external heat exchangers such as V-shaped surface coolers on the top, such as Figure 1 As shown, it has become the mainstream type in the central air-conditioning market.

[0003] The popularization of the concept of "distributed energy system" has played a key role in the transformation of traditional building central air conditioning marked by screw compressors and cooling towers to central air conditioning modules with V-shaped surface cooling and external heat exchangers installed on the top. As distributed energy systems are gradually accepted by the architectural design industry and users, the installation of local central air conditioning modules in each floor of a building or even in each area of ​​each floor to replace traditional building central air conditioning has become a trend; local central air conditioning modules have important features such as greatly shortened heat medium transmission distance, greatly reduced transmission pipe diameter, dispersed heat load, flexible unit module settings, simple unit management, etc., and are becoming the new leader of building central air conditioning;

[0004] However, this top V-shaped surface-cooled external heat exchanger central air-conditioning module must be installed on the roof of a building or on an open-air platform for ventilation and diffusion purposes; if it is embedded in a building and installed on equipment platforms at various locations on each level within the building's exterior facade, the air outlet of the external heat exchanger will be blocked, reflected, and backflowed by the ceiling, resulting in two major problems of "increased exhaust pressure and reduced air volume" and "air flow short circuit" of the external heat exchanger, causing increased condensation pressure in summer and reduced evaporation pressure in winter, resulting in serious degradation of the thermal performance of the local central air-conditioning module. Summary of the invention

[0005] In view of the problems in the background technology, the present invention provides a large air conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity, comprising:

[0006] case;

[0007] The external heat exchanger is vertically arranged in the shell and extends along a plurality of adjacent side walls of the shell. An air inlet and an air outlet are arranged on the side wall of the shell opposite to the external heat exchanger. The external heat exchanger and the partition plate and / or the wall surface of the shell form a closed heat exchange chamber.

[0008] At least two centrifugal fans, whose air inlets are connected to the heat exchange chamber, and whose air outlets are connected to the air outlet on the shell; under the action of the centrifugal fans, outside air enters the shell from the air inlets on multiple sides, then flows through the external heat exchanger for heat exchange, enters the heat exchange chamber, and then is discharged from the shell through the centrifugal fans and the air outlet;

[0009] At least one internal heat exchanger, at least one set of circulation modules for refrigerant circulation is arranged between the external heat exchanger and the fluorine path of the internal heat exchanger, and the water path of the internal heat exchanger exchanges heat with the fluorine path to produce cold (hot) water required by the air-conditioning terminal in the building.

[0010] In some embodiments, the cross-section of the external heat exchanger is "U"-shaped and is extended along three adjacent side walls of the shell.

[0011] In some embodiments, the external heat exchanger is extended along the front side and / or the side of the shell, and the air inlet portion is provided on the front side and / or the side of the shell.

[0012] In some embodiments, the air outlet is located at the bottom or top of the front side of the shell and is in the shape of a long and narrow strip.

[0013] In some embodiments, the centrifugal fan adopts a backward-inclined centrifugal fan, an exhaust cavity is also provided in the shell, the air outlet is provided on one side of the exhaust cavity, and a connecting channel is provided between the heat exchange cavity and the exhaust cavity; the backward-inclined centrifugal fan is arranged in the exhaust cavity, and the air inlet of the backward-inclined centrifugal fan is connected to the channel.

[0014] In some embodiments, the exhaust cavity is provided at the top or bottom and / or side of the heat exchange cavity, the backward-inclined centrifugal fan is provided in the exhaust cavity at each position, and each backward-inclined centrifugal fan is connected to the heat exchange cavity through the channel respectively.

[0015] In some embodiments, the centrifugal fan is a forward multi-blade fan with a volute, the air inlet of the forward multi-blade fan is located in the heat exchange cavity, and the air outlet extends out of the heat exchange cavity and communicates with the air outlet.

[0016] In some embodiments, a plurality of the circulation modules are arranged in parallel between the fluorine paths of the external heat exchanger and the internal heat exchanger.

[0017] In some embodiments, the internal heat exchanger is a plate heat exchanger, and the water path of the plate heat exchanger is connected to the water path of the air conditioner terminal in the building;

[0018] In some embodiments, the internal heat exchanger is a shell and tube heat exchanger, and the water circuit of the shell and tube heat exchanger is connected to the water circuit of the air conditioner terminal in the building.

[0019] In some embodiments, the circulation module includes a compressor, a four-way valve, and a throttling device. The external heat exchanger, the throttling device, the internal heat exchanger, and the compressor are cyclically connected to form a loop, and the compressor is connected to the loop through the four-way valve. The flow direction of the refrigerant in the circulation module is adjusted by switching the four-way valve.

[0020] In some embodiments, the two ends of the compressor are respectively connected to the No. 1 port and the No. 3 port of the four-way valve, the No. 4 port of the four-way valve is connected to the external heat exchanger, and the No. 2 port of the four-way valve is connected to the fluorine pipeline of the internal heat exchanger.

[0021] In some embodiments, an equipment cavity is further provided in the shell, and the circulation module body is placed in the equipment cavity.

[0022] The present invention also provides a combined module of an air-conditioning unit and a building facade, comprising an equipment platform arranged on the building and connected to the facade, and an air-conditioning unit arranged on the equipment platform, wherein the air-conditioning unit adopts the large-scale air-conditioning unit with multi-point negative pressure exhaust in the inner cavity of the heat exchanger as described above; a ventilated shielding decorative part is provided on the facade opening of the equipment platform, and an opening is provided on the shielding decorative part at a position corresponding to the air outlet.

[0023] In some embodiments, the shielding decorative portion is a shutter structure.

[0024] In some embodiments, an exhaust duct is connected to the air outlet portion, one end of the exhaust duct is connected to the air outlet portion, and the other end of the exhaust duct extends to the shutter structure and is connected to the exhaust port on the shutter structure.

[0025] In some embodiments, a plurality of wind guide blades arranged parallel to each other are disposed in the exhaust duct, and the wind guide blades are arranged to be inclined downward.

[0026] In some embodiments, the equipment platform is a recessed portion located between adjacent bay windows on the facade of a building, or is a recessed portion formed vertically from top to bottom on the building and connected to the facade.

[0027] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0028] 1. Optimized the structure of the local central air conditioning module

[0029] Traditional local central air conditioning modules generally use axial flow fans set above or on the side of the external heat exchanger module;

[0030] This embodiment is a large air conditioning unit that uses multiple points of negative pressure exhaust in the heat exchanger cavity, which fundamentally changes the spatial structural relationship of the traditional local central air conditioning module with the external fan on top and the external heat exchanger on the bottom. The external heat exchanger is placed on top and the external fan is placed on the bottom or at the rear, so that the ambient air passes through the external heat exchanger evenly at low speed and low resistance from the front and is discharged from the bottom, thereby optimizing the spatial structure of the local central air conditioning module, reducing the center of gravity and operating noise of the whole machine, and improving stability;

[0031] 2. Improved the integrity and decoration of the building facade

[0032] When traditional local central air conditioners are installed on the equipment platform inside the building, special air ducts need to be installed to guide the exhaust flow of the fan. The air outlet of the air duct faces the top or waist of the decorative facade units such as blinds, and there is serious spatial interference between the fan exhaust duct and the blades of the decorative facade units such as blinds. Not only is the exhaust blocked and the air volume reduced, but the blind blades are also subjected to pressure, vibration, and noise; the integrity and decorativeness of the building's facade are also destroyed.

[0033] The present embodiment adopts a large-scale air-conditioning unit with multiple negative pressure exhaust points in the heat exchanger cavity as a distributed energy module of the building. The local central air-conditioning outdoor unit with a strip air outlet at the bottom is paired with a decorative unit such as a blind on the facade of the building. The air inlet surface on the front side of the central air-conditioning outdoor unit is connected with the main ventilation area on the decorative unit such as the blind, and the strip air outlet at the bottom of the central air-conditioning outdoor unit is connected with the low-position strip air outlet reserved on the decorative unit such as the blind, so as to realize the front-to-back integrated combination of the air-conditioning outdoor unit and the decorative unit such as the blind, and the front-to-back integrated combination of the air-conditioning outdoor unit and the low-position strip air outlet of the decorative unit such as the blind, thereby eliminating the serious spatial interference between the traditional fan exhaust duct and the blades of the facade decorative unit such as the blind, eliminating the forced vibration and noise of the blind blades, and reducing the installation complexity and installation workload of the blind, thereby improving the integrity and decorativeness of the building facade.

[0034] 3. Ensure the thermal performance of the local central air conditioning module

[0035] If traditional local central air conditioning modules are installed on equipment platforms at various locations on various levels inside a building, the air outlet of the external heat exchanger will be blocked, reflected, and refluxed by the ceiling. Even if a dedicated air duct is installed to guide the exhaust flow of the fan, the air outlet of the air duct faces the top or waist of the decorative facade unit such as the blinds, which will cause serious spatial interference and poor exhaust. The two major problems of "increased exhaust pressure and reduced air volume" and "air flow short circuit" of the external heat exchanger will occur, resulting in increased condensation pressure in summer and reduced evaporation pressure in winter, causing serious attenuation of the thermal performance of the local central air conditioning module, which deviates significantly from the laboratory test data;

[0036] The present embodiment is a large-scale air-conditioning unit that adopts multi-point negative pressure exhaust in the inner cavity of the heat exchanger. The tube-fin type external heat exchanger is placed on the top and the fan is placed at the bottom and rear, so that the ambient air passes through the decorative units such as blinds and the fins of the external heat exchanger from the front of the heat exchanger evenly, at low speed and with low resistance; and multiple centrifugal fans are used to replace traditional axial flow fans, which increases the wind pressure and air volume, and improves the speed, range and diffusion and dilution effect of the air discharged from the strip air outlet at the bottom of the unit into the ambient atmosphere; the present embodiment fundamentally solves the two major problems of increased air pressure and reduced air volume and air short circuit of traditional local central air conditioners, and ensures the consistency of the thermal performance data of the air-conditioning unit with laboratory tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features and advantages of the present invention will be more clearly understood through the following detailed description in conjunction with the accompanying drawings, in which:

[0038] Figure 1 It is a structural schematic diagram of an air conditioning unit in the prior art;

[0039] Figure 2 A top view of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 1;

[0040] Figure 3 A side view of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 1;

[0041] Figure 4 This is a schematic diagram of the refrigeration fluorine circuit in Example 1;

[0042] Figure 5 This is a schematic diagram of the heating fluorine circuit in Example 1;

[0043] Figure 6 A side view of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 2;

[0044] Figure 7 A top view of the transformation scheme of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 3;

[0045] Figure 8 A side view of the transformation scheme of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 3;

[0046] Fig. 9 A top view of the transformation scheme of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 4;

[0047] Fig.10 A top view of the transformation scheme of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 5;

[0048] Fig.11 A side view of the transformation scheme of a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided in Example 5;

[0049] Fig.12 This is a schematic diagram of the building structure in Example 6;

[0050] Fig.13 is a longitudinal cross-sectional view of the building structure in Example 6;

[0051] Fig.14 A schematic diagram of the structure of a building facade assembly module provided in Example 6;

[0052] Fig.15 This is a schematic diagram of the building structure in Example 7. DETAILED DESCRIPTION

[0053] The present invention will be described in more detail below with reference to the accompanying drawings showing embodiments of the present invention. However, the present invention may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are set forth in order to achieve a full and complete disclosure and to enable those skilled in the art to fully understand the scope of the present invention. In these drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

[0054] The present invention provides a large-scale air-conditioning unit adopting multi-point negative pressure exhaust in the inner cavity of a heat exchanger, comprising a shell, an external heat exchanger, at least two centrifugal fans, and at least one internal heat exchanger; the external heat exchanger is vertically arranged in the shell, and is extended along multiple adjacent side walls of the shell, and the side walls of the shell and the external heat exchanger opposite to each other are provided with air inlets; the external heat exchanger is enclosed with the partition and / or the inner wall surface of the shell to form a closed heat exchange cavity; the air suction port of the centrifugal fan is connected with the heat exchange chamber, and the air outlet is connected with the air outlet on the shell; under the action of the centrifugal fan, the outside air enters the shell from the air inlets on multiple sides, and then flows through the external heat exchanger for heat exchange and then enters the heat exchange cavity, and then is discharged from the shell through the centrifugal fan and the air outlet; at least one group of circulation modules for refrigerant circulation is arranged between the pipeline in the external heat exchanger and the fluorine path of the internal heat exchanger, and the water path of the internal heat exchanger exchanges heat with the fluorine path to produce cold (hot) water required by the air-conditioning terminal in the building.

[0055] Among them, the hot water or cold water obtained by heat exchange in the water circuit of the plate heat exchanger can be delivered to the fan coil units in the building for cooling and heating in the building, and can also be used for production and domestic water, etc. The specific application scenarios are adjusted according to specific needs and are not limited here.

[0056] The present invention provides a large-scale air-conditioning unit that adopts multi-point negative pressure exhaust in the inner cavity of a heat exchanger. Multiple centrifugal fans are started to exhaust the air in the heat exchange cavity to produce a multi-point negative pressure state in the inner cavity, and a pressure difference is generated inside and outside the tube-fin external heat exchanger, pulling the ambient air to flow through the tube-fin external heat exchanger at a low speed, evenly, and with low resistance. After completing the heat exchange, it flows into the negative pressure air intake ports of multiple centrifugal fans, and after the centrifugal fans increase the pressure head, it flows through the strip air outlet at the bottom of the external heat exchanger module and is injected into the ambient atmosphere at high speed for diffusion and dilution.

[0057] The present invention allows ambient air to pass through decorative units such as shutters on the facade of a building and fins of an external heat exchanger evenly, at low speed and with low resistance; and multiple centrifugal fans are used to replace traditional axial flow fans, thereby increasing wind pressure and air volume, and increasing the speed, range and diffusion and dilution effect of air discharged from the strip air outlet at the bottom of the unit into the ambient atmosphere; the present invention fundamentally solves the two major problems of increased air pressure and reduced air volume and air outlet short circuit in traditional local central air conditioners, thereby ensuring the consistency of thermal performance data of the air conditioning unit with laboratory tests.

[0058] The following is a further description of specific embodiments.

[0059] Example 1

[0060] Reference Figure 2-5 In this embodiment, a large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity is provided, including a shell 1 in which an external heat exchanger 2 is arranged.

[0061] In this embodiment, if Figure 2 As shown in the figure, the external heat exchanger 2 is overall "U"-shaped and extends along the front and two side surfaces of the shell 1. Air inlets 103 are provided on the sides of the shell 1 opposite to the three surfaces of the external heat exchanger 2 to facilitate the external air to pass through the external heat exchanger 2 evenly.

[0062] Among them, the external heat exchanger 2 is a finned heat exchanger, which can be an integral structure or composed of multiple external heat exchanger modules. There is no limitation here and it can be adjusted according to specific circumstances.

[0063] Among them, in other embodiments, the external heat exchanger 2 may also be L-shaped or the like, or may only extend along the front side and one of the side surfaces of the shell. This is not limited here and can be adjusted according to specific circumstances.

[0064] In this embodiment, the top of the “U”-shaped external heat exchanger is combined with the top inner wall of the shell, and partitions are provided on the left side and the bottom of the “U”-shaped external heat exchanger, thereby forming a closed heat exchange chamber 101.

[0065] In this embodiment, an exhaust cavity 102 is provided below the heat exchange cavity 101, and two centrifugal fans 3 are arranged side by side in the exhaust cavity 102. Specifically, a backward-inclined centrifugal fan is used. A communicating channel is provided between the heat exchange cavity 101 and the exhaust cavity 102. The air inlet of the backward-inclined centrifugal fan is connected to the channel to achieve air suction from the heat exchange cavity 101. Furthermore, the exhaust cavity 102 is also connected to an air outlet 104 provided in the housing. In this embodiment, the air outlet is provided at the bottom of the front of the housing 1 and is in the shape of a long and narrow strip, so as to achieve high-speed air discharge in a small area.

[0066] Of course, in other embodiments, the exhaust chamber 102 may also be set at the top or left side of the heat exchange chamber, the centrifugal fan may also be of other types, and the number of centrifugal fans may be more than two, which are not limited here and can be adjusted according to specific needs.

[0067] In this embodiment, an internal heat exchanger 4 is further provided in the shell 1 , and two groups of circulation modules, namely, a circulation module 5 and a circulation module 6 , are provided between the pipeline in the external heat exchanger 1 and the fluorine path of the internal heat exchanger 4 .

[0068] Specifically, the pipeline in the external heat exchanger 2 is divided into two pipeline modules, which are independent of each other but share a set of fin assemblies. The fluorine circuit in the internal heat exchanger 4 is also divided into two fluorine circuit modules, which are independent of each other. The circulation module 5 is cyclically connected with one of the pipeline modules and one fluorine circuit module to form a channel for the circulation of the refrigerant. The circulation module 6 is cyclically connected with another pipeline module and one fluorine circuit module to form a channel for the circulation of the refrigerant. Of course, in other embodiments, the number of circulation modules can be selected according to specific needs, and the number of pipeline modules and fluorine circuit modules is based on the number of circulation modules, which are not limited here.

[0069] In this embodiment, the circulation module 5 and the circulation module 6 have the same structure, and the circulation module 5 is taken as an example for further description.

[0070] Specifically, refer to Figure 4-5 The circulation module 5 includes a compressor 501, a four-way valve 502, and a throttling device 503. One of the pipeline modules of the external heat exchanger 2, the throttling device 501, one of the fluorine path modules of the plate heat exchanger 4, and the compressor 501 are cyclically connected to form a loop, and the compressor 501 is connected to the loop through the four-way valve 502. The flow direction of the refrigerant in the circulation module is adjusted by switching the four-way valve 502.

[0071] Furthermore, the two ends of the compressor 501 are respectively connected to the No. 1 interface a and the No. 3 interface c of the four-way valve 502, the No. 4 interface d of the four-way valve 502 is connected to the external heat exchanger 2, and the No. 2 interface b of the four-way valve 502 is connected to the fluorine pipeline of the plate heat exchanger 4.

[0072] Further, such as Figure 4 As shown in , when the No. 1 port a of the four-way valve 502 is connected to the No. 4 port d, and the No. 2 port b is connected to the No. 3 port c, the circulation module 5 operates the refrigeration fluorine circuit, so that the water circuit of the plate heat exchanger 4 is cooled; Figure 5 As shown in , when the No. 1 port a of the four-way valve 502 is connected to the No. 2 port b, and the No. 3 port c is connected to the No. 4 port d, the circulation module 5 operates the heating fluorine circuit, so that the water circuit of the plate heat exchanger 4 is heated.

[0073] In this embodiment, the water path of the internal heat exchanger 4 is connected to the water circulation system through the inlet and outlet valves 8, and its operation is promoted by the water pump 7.

[0074] In this embodiment, the internal heat exchanger 6 adopts a plate heat exchanger, and the water channel of the plate heat exchanger is connected to the water channel at the terminal of the air conditioner in the building; of course, in other embodiments, the internal heat exchanger 4 can also adopt a shell and tube heat exchanger, and the water channel of the shell and tube heat exchanger is connected to the water channel at the terminal of the air conditioner in the building; the structural form of the internal heat exchanger 4 can be adjusted according to the specific situation and is not limited here.

[0075] In this embodiment, an equipment cavity is further provided in the housing 1 , and each circulation module is placed in the equipment cavity. Preferably, in this embodiment, the equipment cavity is provided behind the heat exchange cavity 101 in the housing 1 .

[0076] The advantages of a large air conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity provided by this embodiment are:

[0077] 1. Optimized the structure of the local central air conditioning module

[0078] Traditional local central air conditioning modules generally use axial flow fans set above or on the side of the external heat exchanger module;

[0079] This embodiment is a large air conditioning unit that uses multiple points of negative pressure exhaust in the heat exchanger cavity, which fundamentally changes the spatial structural relationship of the traditional local central air conditioning module with the external fan on top and the external heat exchanger on the bottom. The external heat exchanger is placed on top and the external fan is placed at the bottom and rearward, so that the ambient air passes through the external heat exchanger evenly at low speed and low resistance from the front and is discharged from the bottom, thereby optimizing the spatial structure of the local central air conditioning module, reducing the center of gravity and operating noise of the whole machine, and improving stability;

[0080] 2. Improved the integrity and decoration of the building facade

[0081] When traditional local central air conditioners are installed on the equipment platform inside the building, special air ducts need to be installed to guide the exhaust flow of the fan. The air outlet of the air duct faces the top or waist of the decorative facade unit such as the blinds. The fan exhaust duct and the blades of the decorative facade unit such as the blinds have serious spatial interference, which not only causes poor exhaust, but also causes the blinds to bear pressure, vibrate, and make noise; it also destroys the integrity and decorativeness of the building's facade;

[0082] The present embodiment adopts a large-scale air-conditioning unit with multiple negative pressure exhaust points in the heat exchanger cavity as a distributed energy module of the building. The local central air-conditioning outdoor unit with a strip air outlet at the bottom is paired with a decorative unit such as a blind on the facade of the building. The front air inlet surface of the central air-conditioning outdoor unit is connected with the main ventilation area on the decorative unit such as the blind, and the strip air outlet at the bottom of the central air-conditioning outdoor unit is connected with the low-position strip air outlet reserved on the decorative unit such as the blind, so as to realize the front-to-back integrated combination of the air-conditioning outdoor unit and the decorative unit such as the blind, and the front-to-back integrated combination of the air-conditioning outdoor unit and the low-position strip air outlet of the decorative unit such as the blind, thereby eliminating the serious spatial interference between the traditional fan exhaust duct and the blades of the facade decorative unit such as the blind, eliminating the forced vibration and noise of the blind blades, and reducing the installation complexity and installation workload of the blind, thereby improving the integrity and decorativeness of the building facade.

[0083] 3. Ensure the thermal performance of the local central air conditioning module

[0084] If traditional local central air conditioning modules are installed on equipment platforms at various locations on various levels inside a building, the air outlet of the external heat exchanger will be blocked, reflected, and refluxed by the ceiling. Even if a dedicated air duct is installed to guide the exhaust flow of the fan, the air outlet of the air duct faces the top or waist of the decorative facade unit such as the blinds, which will cause serious spatial interference and poor exhaust. The two major problems of "increased exhaust pressure and reduced air volume" and "air flow short circuit" of the external heat exchanger will occur, resulting in increased condensation pressure in summer and reduced evaporation pressure in winter, causing serious attenuation of the thermal performance of the local central air conditioning module, which deviates significantly from the laboratory test data;

[0085] The present embodiment is a large-scale air-conditioning unit that adopts multi-point negative pressure exhaust in the inner cavity of the heat exchanger. The tube-fin type external heat exchanger is placed on the top and the fan is placed on the bottom, so that the ambient air passes through the decorative units such as blinds and the fins of the external heat exchanger from the front of the heat exchanger evenly, at low speed and with low resistance; and multiple centrifugal fans are used to replace traditional axial flow fans, which increases the wind pressure and air volume, and improves the speed, range and diffusion and dilution effect of the air discharged from the strip air outlet at the bottom of the unit into the ambient atmosphere; the present embodiment fundamentally solves the two major problems of increased air pressure and reduced air volume and air short circuit in traditional local central air conditioners, and ensures the consistency of the thermal performance data of the air-conditioning unit with laboratory tests.

[0086] Example 2

[0087] Reference Figure 6 This embodiment is adjusted based on embodiment 1.

[0088] Specifically, in this embodiment, the air outlet cavity 102 is arranged at the top of the heat exchange cavity 101, and the corresponding air outlet portion 104 is also arranged at the top of the front of the shell in a narrow strip shape. A plurality of centrifugal fans 3 are directly arranged on the top of the shell 1. This embodiment is suitable for buildings with an exhaust interface in the upper part of the equipment platform.

[0089] In this embodiment, the remaining structures of the large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity can refer to the description in Example 1 and are not limited here.

[0090] Example 3

[0091] Reference Figure 7-8 This embodiment is adjusted based on embodiment 1.

[0092] Specifically, in the present embodiment, an exhaust chamber 102 connected to the heat exchange chamber 101 is provided at the rear and bottom, and a backward-inclined centrifugal fan with an axial horizontal arrangement is provided in the exhaust chamber at the rear of the heat exchange chamber 101, and an axial vertically arranged backward-inclined centrifugal fan is provided in the exhaust chamber at the bottom of the heat exchange chamber 101, and the air intakes of the two backward-inclined centrifugal fans are connected to the heat exchange chamber 101 for air intake.

[0093] Of the two centrifugal fans in this embodiment, one is arranged on the rear wall of the heat exchange chamber, and the other is arranged on the bottom, instead of both being arranged on the bottom in Embodiment 1. This arrangement in this embodiment reduces the airflow field gradient in the heat exchange chamber, and makes the heat exchanger more evenly ventilated, which is suitable for thin and tall heat exchangers.

[0094] In this embodiment, the remaining structures of the large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity can refer to the description in Example 1 and are not limited here.

[0095] Example 4

[0096] Reference Fig. 9 This embodiment is adjusted based on embodiment 3.

[0097] Specifically, in this embodiment, two groups of independent plate heat exchangers are arranged in the shell 1, and two groups of circulation modules are respectively connected between each group of plate heat exchangers 4 and the external heat exchanger 2; specifically, two independent circulation modules 5 and circulation modules 6 are connected between the plate heat exchanger 401 and the external heat exchanger 2, and two independent circulation modules 9 and circulation modules 10 are connected between the plate heat exchanger 402 and the external heat exchanger 2.

[0098] In this embodiment, four centrifugal fans 3 are arranged in the exhaust chamber 102. Specifically, two axially horizontally arranged backward-inclined centrifugal fans are arranged side by side in the exhaust chamber behind the heat exchange chamber 101, and two axially vertically arranged backward-inclined centrifugal fans are arranged side by side in the exhaust chamber at the bottom of the heat exchange chamber 101. The air suction ports of the four backward-inclined centrifugal fans are connected to the heat exchange chamber 101 for air intake.

[0099] This embodiment increases the number of plate heat exchangers and the number of centrifugal fans, and correspondingly selects a larger external heat exchanger 2, which is suitable for large air-conditioning units.

[0100] In this embodiment, the remaining structures of the large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity can refer to the description in Example 3 and are not limited here.

[0101] Example 5

[0102] Reference Figure 10-11 This embodiment is adjusted based on embodiment 4.

[0103] Specifically, in the present embodiment, the centrifugal fan 3 adopts a forward multi-blade fan; the exhaust chamber is omitted in the present embodiment, and the air inlet of each forward multi-blade fan is located in the heat exchange chamber 101, and the air outlet extends out of the heat exchange chamber 101 and is connected to the air outlet part 104.

[0104] Furthermore, in this embodiment, three forward multi-blade fans are provided, two of which are arranged side by side at the rear side of the heat exchange chamber 101, and the other forward multi-blade fan is arranged at the lower side of the heat exchange chamber 101. Fig.10 The air outlets of the three forward multi-blade fans extend along the heat exchange cavity 101 and are connected to the narrow air outlet portion 104 at the bottom of the front side of the housing 1.

[0105] In this embodiment, the remaining structures of the large air-conditioning unit using multiple negative pressure exhaust points in the heat exchanger cavity can refer to the description in Example 4 and are not limited here.

[0106] Example 6

[0107] Reference Figure 10-14 The present invention also provides a module for combining an air-conditioning outdoor unit and a building facade, comprising an equipment platform 12 arranged on the building and connected to the facade, and an air-conditioning unit arranged on the equipment platform 12, the air-conditioning unit adopts the large-scale air-conditioning unit with multiple negative pressure exhaust points in the heat exchanger cavity as described in any one of embodiments 1-5; a ventilated shielding decorative part 11 is provided on the outward facade opening of the equipment platform, and an opening is provided on the shielding decorative part 11 at a position corresponding to the air outlet.

[0108] In this embodiment, Fig.10As shown in , the equipment platform 12 is located in the concave part between the bay window structures of adjacent floors of the building; the shielding decorative part is a shutter structure. Of course, in other embodiments, the specific position of the equipment platform and the implementation scheme of the shielding decorative part can be adjusted according to specific circumstances, and are not limited here.

[0109] In this embodiment, an exhaust duct 13 is connected to the air outlet 104 of the air conditioner outdoor unit 01. One end of the exhaust duct 13 is connected to the air outlet 104, and the other end extends to the shutter structure and is connected to the exhaust port on the shutter structure.

[0110] Furthermore, a plurality of wind guide blades arranged parallel to each other are provided in the exhaust duct 11, and the wind guide blades are arranged to be tilted downward, so that the air entering the exhaust duct 13 is discharged downward along the wind guide blades and tilted toward the lower right corner, so as to keep the high-speed exhaust air away from the air inlet.

[0111] Of course, in other embodiments, the wind guide blades may not be provided. For example, the angle of the blades on the shutter corresponding to the outlet of the exhaust duct 11 can be adjusted so that the air flows downward at 45°. This is not limited here and can be adjusted according to specific needs.

[0112] The outdoor air conditioning unit and building facade combination module provided by the present invention, as an energy module of the building, pairs an air conditioning unit provided with a strip air outlet with a decorative unit such as a blind on the building facade, docks the air inlet surface of the air conditioning unit with the main ventilation area on the decorative unit such as the blind, docks the strip air outlet of the air conditioning unit with the strip air outlet reserved on the decorative unit such as the blind, realizes the front-to-back integrated combination of the air conditioning outdoor unit and the decorative unit such as the blind, and the front-to-back integrated combination of the air conditioning outdoor unit and the strip air outlet of the decorative unit such as the blind;

[0113] During operation, the centrifugal fan behind the air-conditioning unit starts and creates a negative pressure area in the heat exchange chamber, pulling the ambient air to pass through the gaps in the facade decorative units such as blinds, and then pass through the gaps in the fins of the external heat exchanger evenly, at low speed and with low resistance. After completing the heat exchange, it is sucked in by the centrifugal fan, and after being pressurized by the centrifugal fan, it enters the strip air outlets of decorative units such as blinds from the strip air outlet, and finally is injected into the ambient air at high speed.

[0114] Example 7

[0115] Reference Fig.15 This embodiment is an adjustment based on Embodiment 9.

[0116] In this embodiment, the equipment platform 12 is an inner recessed portion vertically formed from top to bottom and connected to the outer facade of the building.

[0117] In this embodiment, the remaining structures of the air conditioner outdoor unit and the building facade combination module can refer to the description in Example 6 and are not limited here.

[0118] Those skilled in the art will appreciate that the present invention can be implemented in many other specific forms without departing from its own spirit or scope. Although the implementation of the present invention has been described, it should be understood that the present invention should not be limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A large air conditioning unit, characterized in that: include: case; The external heat exchanger is vertically arranged in the shell and extends along a plurality of adjacent side walls of the shell. An air inlet and an air outlet are arranged on the side wall of the shell opposite to the external heat exchanger. The external heat exchanger, the partition plate and the wall surface of the shell form a closed heat exchange chamber. At least two centrifugal fans, whose air inlets are connected to the heat exchange chamber, and whose air outlets are connected to the air outlet on the shell; under the action of the centrifugal fans, outside air enters the shell from the air inlets on multiple sides, then flows through the external heat exchanger for heat exchange, enters the heat exchange chamber, and then is discharged from the shell through the centrifugal fans and the air outlet; At least one internal heat exchanger, at least one set of circulation modules for circulating refrigerant is arranged between the external heat exchanger and the fluorine path of the internal heat exchanger, and the water path of the internal heat exchanger exchanges heat with the fluorine path to produce hot and cold water required by the air-conditioning terminal in the building; An exhaust cavity is also provided in the shell, the air outlet is provided on one side of the exhaust cavity, a communicating channel is provided between the heat exchange cavity and the exhaust cavity, and the air suction port of the centrifugal fan is communicated with the channel to realize air suction from the heat exchange cavity; The circulation module includes a compressor, a four-way valve, and a throttling device. The external heat exchanger, the throttling device, the internal heat exchanger, and the compressor are cyclically connected to form a loop, and the compressor is connected to the loop through the four-way valve. The flow direction of the refrigerant in the circulation module is adjusted by switching the four-way valve. The housing is also provided with an equipment cavity, and the circulation module body is placed in the equipment cavity; The exhaust cavity and the equipment cavity are separated from the heat exchange cavity by a partition.

2. The large air conditioning unit according to claim 1, characterized in that: The cross section of the external heat exchanger is "U"-shaped and is extended along three adjacent side walls of the shell.

3. The large air conditioning unit according to claim 1 or 2, characterized in that: The external heat exchanger is extended along the front side and / or the side of the shell, and the air inlet portion is arranged on the front side and / or the side of the shell.

4. The large air conditioning unit according to claim 1 or 2, characterized in that: The air outlet is located at the bottom or top of the front side of the shell and is in the shape of a long and narrow strip.

5. The large air conditioning unit according to claim 1 or 2, characterized in that: The centrifugal fan is a backward-inclined centrifugal fan; the backward-inclined centrifugal fan is arranged in the exhaust cavity, and the air inlet of the backward-inclined centrifugal fan is connected to the channel.

6. The large air conditioning unit according to claim 5, characterized in that: The exhaust cavity is provided at the top, bottom and / or side of the heat exchange cavity, and the exhaust cavity at each position is provided with the backward-inclined centrifugal fan, and each backward-inclined centrifugal fan is connected to the heat exchange cavity through the channel.

7. The large air conditioning unit according to claim 1 or 2, characterized in that: The centrifugal fan is a forward multi-blade fan with a volute, the air inlet of the forward multi-blade fan is located in the heat exchange cavity, and the air outlet extends out of the heat exchange cavity and is connected with the air outlet.

8. The large air conditioning unit according to claim 1, characterized in that: A plurality of the circulation modules are arranged in parallel between the fluorine paths of the external heat exchanger and the internal heat exchanger.

9. The large air conditioning unit according to claim 1, characterized in that: The internal heat exchanger is a plate heat exchanger, and the water channel of the plate heat exchanger is connected with the water channel of the air conditioner terminal in the building.

10. The large air conditioning unit according to claim 1, characterized in that: The internal heat exchanger is a shell and tube heat exchanger, and the water channel of the shell and tube heat exchanger is connected with the water channel of the air conditioner terminal in the building.

11. The large air conditioning unit according to claim 1, characterized in that: The two ends of the compressor are respectively connected to the No. 1 interface and the No. 3 interface of the four-way valve, the No. 4 interface of the four-way valve is connected to the external heat exchanger, and the No. 2 interface of the four-way valve is connected to the fluorine pipeline of the internal heat exchanger.

12. An air conditioning unit and building facade combination module, characterized in that: It includes an equipment platform arranged on a building and connected to an exterior facade, and an air-conditioning unit arranged on the equipment platform, wherein the air-conditioning unit adopts a large air-conditioning unit as described in any one of claims 1 to 11; a ventilated shielding decorative part is arranged on the exterior facade opening of the equipment platform, and an opening is opened on the shielding decorative part at a position corresponding to the air outlet.

13. The air conditioning unit and building facade combination module according to claim 12, characterized in that: The shielding decorative part is a shutter structure.

14. The air conditioning unit and building facade combination module according to claim 13, characterized in that: The air outlet portion is connected to an exhaust duct, one end of the exhaust duct is communicated with the air outlet portion, and the other end of the exhaust duct extends to the shutter structure and is communicated with the exhaust port on the shutter structure.

15. The air conditioning unit and building facade combination module according to claim 14, characterized in that: A plurality of wind guide blades arranged parallel to each other are arranged in the exhaust pipe, and the wind guide blades are arranged to be inclined downward.

16. The air conditioning unit and building facade combination module according to claim 12 or 13, characterized in that: The equipment platform is a recessed portion located between adjacent bay windows on the facade of the building, or is a recessed portion vertically formed from top to bottom on the building and connected to the facade.

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