CN220103273U - Fin tube heat exchanger and air conditioner host machine, system and equipment platform thereof - Google Patents

Abstract

The utility model belongs to the field of efficient energy-saving air conditioning technology and green buildings, and discloses a finned tube heat exchanger, an air conditioning host machine, a system and an equipment platform thereof. The horizontal section of the fin tube heat exchanger is U-shaped, two sides of the U-shaped are long sides, and the bottom side is a short side; the length ratio of the long side to the short side is 2-6:1. The air conditioner main unit comprises a finned tube heat exchanger, a compressor, a gas-liquid separator, a fan and the like; the air conditioner host is provided with an outer frame. The air conditioner host system comprises at least 2 air conditioner hosts, wherein the air conditioner hosts are arranged side by side, and an outward V-shaped opening air channel is formed between fin tube heat exchangers of the adjacent air conditioner hosts. The air conditioner host equipment platform comprises an equipment space for setting an air conditioner host system and the air conditioner host system. The utility model constructs a flexible and efficient heat exchange air path structure of the air conditioner host; the air conditioner main unit is convenient to detect and maintain; conditions are created for constructing a side-in side-out air path structure by matching with the outer vertical surface of the equipment platform.

Description

Fin tube heat exchanger and air conditioner host machine, system and equipment platform thereof

Technical Field

The utility model belongs to the field of efficient energy-saving air conditioning technology and green buildings, and particularly relates to a finned tube heat exchanger, an air conditioner host machine, an air conditioner system and an air conditioner equipment platform.

Background

The finned tube heat exchanger mainly comprises a plurality of rows of fins and a plurality of rows of copper tubes penetrating through the fins, wherein refrigerant sides are arranged in the copper tubes, air sides are arranged among the fins outside the copper tubes, and air penetrates through the outside of the finned tube heat exchanger so as to exchange heat with the refrigerant sides.

(this prior art solution appears to describe a detachable plate heat exchanger instead of a fin tube heat exchanger) a fin tube heat exchanger CN212158280U of the prior art, which is disclosed as comprising a plurality of heat exchange tubes and a plurality of fins, each of the fins having a plurality of tube holes thereon, the plurality of fins being arranged at intervals in a thickness direction of the fins, the plurality of heat exchange tubes being respectively inserted into the plurality of tube holes of each fin, a spacing between adjacent heat exchange tubes in a longitudinal direction of the fins being St, a spacing between adjacent fins in a thickness direction of the fins being Fp, wherein 16mm St is 18mm, and Fp is 1.1mm is 1.3 mm. After the width of the fin is increased, the number of bridge seams on the fin can be increased, the heat transfer area is increased, the disturbance of the fin to air is enhanced, and the convection heat transfer intensity is improved. The fin tube type heat exchanger has the advantages that the space between the centers of adjacent heat exchange tubes in the longitudinal direction of the fins is between 16mm (inclusive) and 18mm (inclusive) and the space between the adjacent fins in the thickness direction of the fins is limited between 1.1mm (inclusive) and 1.3mm (exclusive), the heat exchange performance, the cost, the structural size and the convenience in processing are considered, the fin tube type heat exchanger has a compact structure, and the heat exchange performance is improved. But the scheme can not effectively enlarge the heat exchange area S of the fins, reduce the heat transfer temperature difference delta t of the heat exchanger body, improve the evaporation pressure and reduce the condensation pressure.

The structural relationship between the existing fin tube heat exchanger, the air conditioner host and the outer corridor type equipment platform still has a plurality of technical problems, including:

1) The ventilation surface and the fin heat exchange area of the fin tube type heat exchanger are small, the heat exchange effect is poor, and the like.

2) The energy density of the air conditioning host equipment platform is low.

The calculated power density of the current air conditioner host machine is generally higher than 40 kw/square meter according to the occupied area of the main body, and the power density of the current air conditioner host machine equipment platform is generally only about 11.6 kw/square meter, namely the occupied area of an air conditioner host machine inlet and outlet air duct, a maintenance channel and a ventilation blind area on the platform is more than 2.4 times of the main body area of the air conditioner host machine; the floor area of the main unit equipment platform of the air conditioner is overlarge at present, which generally reaches more than 1.5% of the total area of the building, and the main unit equipment platform of the air conditioner becomes a prominent problem in the design of heating ventilation and air conditioning of the building.

3) The equipment platform occupies too large transverse width of the outer vertical face of the building.

The current air conditioner host and equipment platform have unreasonable wind field structure, low utilization rate of deep space and top space, and overlarge transverse width of building outer elevation occupied by the equipment platform; the peripheral galleries are all occupied by air inlet and outlet openings of an air conditioner host machine at every 12 equipment layers in the current super high-rise building, as shown in fig. 4. The width of the outer facade of the building is an important resource next to the building area in the index system of the building, the air conditioner host equipment platform in the high-rise super-high-rise building contends for the width resource of the outer facade of the building, and the transverse width of the outer facade is occupied to be too large, so that the visual communication between the inner space of the same-rise building and the external environment is blocked, and the method also has become an outstanding problem in the design of heating ventilation and air conditioning of the building.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model innovates the structure of the external heat exchanger module of the central air conditioner host and the spatial structure relationship between the central air conditioner host and the building, and provides a finned tube heat exchanger

Another object of the present utility model is to provide an air conditioner host and an air conditioner host system thereof;

another object of the present utility model is to provide an air conditioning host equipment platform.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the horizontal section of the fin tube heat exchanger is U-shaped, two sides of the U-shaped fin tube heat exchanger are long sides, and the bottom side is a short side; the length ratio of the long side to the short side is 2-6:1.

Further, the fins are vertically arranged and are distributed along the horizontal direction; the length ratio of the long side to the short side is 3-4:1.

Further, one side of the section of the fin tube heat exchanger perpendicular to the long sides of the fins is a heat exchanger air inlet surface, and the other side is a heat exchanger air outlet surface; the air outlet surface belongs to the negative pressure cavity area of the heat exchanger;

the inlet face of the air inlet flow is a finned tube heat exchanger, and the intersection angle between the air inlet flow and the tip of each fin plate on the finned tube heat exchanger is an obtuse angle; the obtuse angle beta is 97.5-135 degrees;

the air inlet flow hits the tip of each fin plate in the fin tube heat exchanger at an obtuse angle beta, and is reflected by the fin tip plate to enter the fin gap to flow to the negative pressure cavity of the heat exchanger.

Further, the flow rate of the air flow entering each fin gap d is equal to the air inlet flow intercepted by the vertical distance delta between the tips of the front fin plate and the rear fin plate of the fin tube heat exchanger on the air inlet section;

delta = d.sin alpha/2, wherein alpha is the apex angle alpha of the long-side extension line of the heat exchanger;

preferably, the apex angle alpha of the extension line of the long side of the heat exchanger is 15-110 degrees.

Further preferably, the apex angle alpha of the extension line of the long side of the heat exchanger is 30-90 degrees.

Further preferably, the apex angle alpha of the extension line of the long side of the heat exchanger is 30-60 degrees.

The vertical distance delta value of the tips of the front fin plate and the rear fin plate of the fin tube heat exchanger on the air inlet section is 0.13 d-0.7 d; preferably, the air flow speed of the fin gap is 1/3 of the air inlet speed, the vertex angle alpha corresponding to the extension line of the long side of the heat exchanger is 39 degrees, and the incidence obtuse angle beta is 109.5 degrees.

An air conditioner main unit, wherein the finned tube heat exchanger, an air conditioner compressor, a gas-liquid separator, a four-way valve, an expansion valve, an electric box and a fan are arranged in a shell of the air conditioner main unit;

the finned tube heat exchanger and at least part of the shell jointly form a negative pressure cavity communicated with a heat exchange air path of the finned tube heat exchanger.

Further, at least 2 fans are arranged above the fin tube heat exchanger along the long side direction.

Further, the fan is an axial flow fan or a centrifugal fan; preferably, the fan is a backward inclined outer rotor centrifugal fan.

Further, the air conditioner compressor, the gas-liquid separator, the four-way valve, the expansion valve and the electric box are arranged in a middle-lower ventilation blind area of the negative pressure cavity of the finned tube heat exchanger, which is close to the backboard of the air conditioner main unit.

An air conditioner host system comprises at least 2 air conditioner hosts, wherein the air conditioner hosts are arranged side by side, an outward V-shaped air channel with openings facing the U-shaped finned tube heat exchangers is formed between the finned tube heat exchangers of the adjacent air conditioner hosts, and the openings of the V-shaped air channel are opposite to the openings of the U-shaped finned tube heat exchangers.

Further, the distance d between adjacent air conditioning hosts is 3-20 cm.

Further, the included angle gamma of the V-shaped air duct is 50-120 degrees.

An air conditioner host equipment platform, wherein at least 1 group of air conditioner host systems are transversely arranged in the equipment platform; the equipment platform is provided with an outer vertical surface for ventilation, and the bottom edge of the U-shaped finned tube heat exchanger of the air conditioner host system is close to the outer vertical surface; an exhaust cavity is arranged above the air conditioner main unit, and an exhaust outlet of the exhaust cavity is arranged and/or is close to the outer vertical surface.

Further, an air exhaust area and an air inlet area are arranged on the outer vertical surface; the air exhaust area on the outer vertical surface corresponds to the air exhaust cavity of the air conditioner main unit, and the air inlet area on the outer vertical surface corresponds to the air inlet of the air conditioner main unit.

Further, the exhaust areas on the outer vertical surface are continuously arranged on the upper portion of the outer vertical surface, the air inlet areas on the outer vertical surface are continuously arranged on the middle lower portion of the outer vertical surface, and the boundary between the exhaust areas on the outer vertical surface and the air inlet areas on the outer vertical surface is a horizontal straight line or the boundary is close to the horizontal straight line.

Further, the area of the exhaust area on the outer elevation is 25% -50% of the area of the outer elevation for ventilation.

Further, a three-in-one channel for people to carry out maintenance and setting copper pipes and cable bridges of the air conditioning system is formed between the backboard of the air conditioning host and the inner wall surface of the equipment platform.

Compared with the prior art, the utility model has the following beneficial effects:

(1) high-efficiency heat exchange air path structure of external heat exchanger of air conditioner main unit is constructed, and energy density of main unit is improved

The air conditioner main unit of the embodiment adopts a pneumatic layout of medium-speed air inlet at the middle lower part of the short side and high-speed air exhaust at the top, and the main section of the air inlet channel air exhaust channel of the external heat exchanger is accommodated in the air conditioner main unit;

in the limited space of the air conditioner host, the utility model spreads against the air inlet surface of the deep U-shaped finned tube heat exchanger to obtain a large-area heat exchanger ventilation surface, and spreads on the large-area heat exchanger ventilation surface for the second time to obtain a large-area fin heat transfer surface.

The external air flow of the air conditioner main unit enters the air conditioner main unit at a medium speed of about 4m/S, the air inlet air flow in the air conditioner main unit enters the rear side fins of the fin gaps at an obtuse angle, the air inlet air flow which is planed by the rear side fin planing tool enters the fin gaps, the air inlet air flow is decelerated and dispersed, and passes through the deep U-shaped fin tube heat exchanger with a large total ventilation section and a huge total fin heat exchange area S at a low speed of about 1.6m/S to exchange heat, flows into the negative pressure cavity after heat exchange, is collected to the air suction port of the air blower under the negative pressure traction of the air blower of the external heat exchanger, and is finally discharged from the air exhaust cavity at a high speed of about 8m/S after the air blower is accelerated and boosted.

The air conditioner main unit expands a huge outer heat exchanger ventilation surface, and then secondarily expands a huge fin heat exchange area S on the huge ventilation surface, so that the heat transfer temperature difference delta t of the heat exchanger body is reduced, the condensing pressure is reduced, the evaporating pressure is improved, the circulation quantity of the refrigerant, the heat absorption capacity of the evaporator and the heat release capacity of the condenser are improved, the volume of the main unit is effectively controlled, the energy density of the main unit body is improved, and the precondition is prepared for improving the energy density of a platform of equipment.

(2) Convenient air conditioner main machine detection maintenance

The utility model sets the compressor, gas-liquid separator, four-way valve, expansion valve, electric box and other fluorine circuit components to the ventilation blind area of the heat exchanger negative pressure cavity near the middle lower part of the back plate, and the back plate of the negative pressure cavity is set on the short side of the host, when the air conditioner host is installed on the equipment platform, the back plate of the external heat exchanger negative pressure cavity faces the maintenance channel of the inner side of the platform;

the air conditioner main machine can be in fault, and usually comprises a fluorine path movement structural member such as a compressor, a four-way valve, an expansion valve, an electric box and the like, and circuit components such as a contactor, a controller, a sensor, a fan and the like; the structural design of the air conditioner host machine of the embodiment facilitates inspection and maintenance: when a fault occurs, the negative pressure cavity backboard of the external heat exchanger is opened on the maintenance channel at the inner side of the platform, and fluorine circuit components such as a compressor, a four-way valve, an expansion valve, an electric box, a fan and the like which are likely to be in fault are completely removed, so that the air conditioner main unit is very convenient to check and maintain, and the problem of checking and maintaining inherent to the air conditioner main unit is solved.

(3) Creating conditions for constructing side-in-side air outlet path structure by matching with outer vertical surface of equipment platform

The classical top outlet central air conditioner host is customized for the scene of the roof terrace; and the building is moved into a middle layer equipment platform of a building from a roof terrace, and innovation of a combination mode of an air path of an air conditioner host and an outer elevation of the platform is needed.

The utility model establishes that the medium-speed air inlet and the medium-speed air outlet of the middle and lower parts of the main machine and the high-speed air outlet of the top air outlet cavity are arranged on the same side in the same direction, and the air inlet area is as that of the air inlet: the pneumatic layout of the exhaust area is approximately equal to 2:1, the exhaust cavity with the exhaust cross-section area of approximately 1/2 of the air inlet surface is arranged at the top of the negative pressure cavity of the outer heat exchanger arranged along the long side, and the idle space at the top of the platform of the development equipment is developed; the embodiment has compact structure, and the air inlets of the air outlets of the air conditioner host are arranged in the same direction, on the same side and up and down, so that conditions are prepared for arranging the air conditioner host on the equipment platform and constructing a smooth air path structure of the side inlet and the side outlet of the air conditioner host by matching with the outer elevation of the equipment platform;

according to the embodiment, under the design concept that the air inlet area of the air conditioner main unit is equal to the air exhaust area approximately equal to 2:1, the air exhaust speed is 2 times that of the air inlet, the air exhaust dynamic pressure head is 4 times that of the air inlet dynamic pressure head, the air exhaust speed and kinetic energy of the air conditioner main unit external heat exchanger are effectively improved, and the range and diffusion dilution effect that air conditioner main unit exhaust jet flow penetrates through the outer vertical surface of the equipment platform and enters the environment atmosphere are effectively improved.

(4) Lateral width of outer vertical face of equipment layer occupied by air inlet and outlet face of air conditioner main unit

The width of the outer facade of the building is an important resource next to the building area in the building index system, and the current situation that the air inlet and outlet face of the air conditioner host occupies the transverse width of the outer facade of the building equipment is overlarge, so that ventilation, lighting and visual communication between the inner space of the same-layer building and the external environment are blocked, and the air inlet and outlet face of the air conditioner host has become an outstanding problem in the design of building heating, ventilation and air conditioning.

According to the embodiment, the power density of the air conditioner host is improved by recombining the internal external heat exchanger and the external heat exchanger air inlet and outlet paths of the air conditioner host, so that the occupied area of the equipment platform is greatly reduced under the same building heat load condition, the transverse width of the outer vertical face of the building equipment occupied by the air inlet and outlet face of the air conditioner host is greatly reduced, and ventilation lighting and visual communication between the internal space of the same building and the external environment are ensured.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of a deep U-shaped finned tube heat exchanger;

FIG. 2 is a horizontal cross-sectional view of a "fin planer" at the fin gap inlet to intercept the flow of air intake during operation of the air conditioner host, to reduce the flow of air into the fin gap in a stepped planing mode, and to discharge the fin gap after heat exchange with the fins is completed;

FIG. 3 is a three-dimensional view of an air conditioning host employing a deep U-fin tube heat exchanger;

FIG. 4 is a vertical cross-sectional view of a negative pressure cavity structure of an air conditioner main unit employing a deep U-shaped finned tube heat exchanger;

FIG. 5 is a top view of the negative pressure cavity structure of an air conditioner main unit employing a deep U-shaped finned tube heat exchanger;

FIG. 6 is a schematic diagram of an air conditioning system employing a deep U-fin tube heat exchanger air conditioning host;

FIG. 7 is a vertical cross-sectional view of an air conditioning host employing a deep U-fin tube heat exchanger;

FIG. 8 is a top view of an air conditioning host employing a deep U-fin tube heat exchanger;

FIG. 9 is a schematic diagram of an air conditioning host system;

FIG. 10 is a vertical cross-sectional view of a deep U-shaped finned tube heat exchanger air conditioner mainframe structure employing a retroverted outer rotor centrifugal fan according to example 2;

FIG. 11 is a vertical cross-sectional view of a deep U-shaped finned tube heat exchanger air conditioner mainframe employing a retroverted outer rotor centrifugal fan in accordance with example 2;

FIG. 12 is a vertical cross-sectional view of an air conditioning host unit platform employing a deep U-fin tube heat exchanger;

FIG. 13 is a top view of a heavy duty equipment platform employing a deep U-fin tube heat exchanger air conditioning host;

FIG. 14 is a top view of a heavy duty equipment platform run using a deep U-tube finned tube heat exchanger air conditioning host;

FIG. 15 is a schematic view of the relationship between the intake area and the exhaust area on the outer side.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, based on the described embodiments, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the utility model.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

In the description of the present utility model, it should be understood that the terms "transverse," "longitudinal," "length," "upper," "lower," "left," "right," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Definition: the outer facade of the corridor type equipment platform is set to be longitudinal, and the outer facade of the corridor type equipment platform is set to be transverse.

Example 1

As shown in figures 1-2, an air inlet surface of the finned tube heat exchanger is unfolded to obtain a large-area heat exchanger ventilation surface, and a large-area fin heat transfer surface is unfolded on the large-area ventilation surface for the second time, so that the fin heat exchange area S is effectively enlarged, the heat transfer temperature difference delta t of a heat exchanger body is reduced, the evaporation pressure is increased, and the condensation pressure is reduced.

The horizontal section of the finned tube heat exchanger 37 is U-shaped, the two sides of the U-shaped are long sides 155, and the bottom side is a short side 156; the length ratio of the long side 155 to the short side 156 is 2-6:1.

The fin plates 110 are vertically arranged and horizontally arranged.

The finned tube heat exchanger 37 is provided with a fluorine path 134 and a lotus header gas collection tube 133.

The finned tube heat exchanger comprises a fin plate 110 and heat exchange tubes 115; a plurality of fin plates 110 parallel to each other and spaced apart from each other by a certain interval to form a fin group; passes through the heat exchange tubes 115 in a direction perpendicular to the plane of the fin plate 110.

As a specific embodiment, the length ratio of the long side 155 to the short side 156 is 3-4:1.

One side of the section of the fin tube heat exchanger 37 perpendicular to the long sides of the fins is a heat exchanger air inlet surface, and the other side is a heat exchanger air outlet surface; the air outlet surface belongs to the negative pressure cavity 124 area of the heat exchanger;

the inlet surface of the air inlet flow is a finned tube heat exchanger, and the intersection angle between the air inlet flow and the tip of each fin plate 110 on the finned tube heat exchanger 37 is an obtuse angle beta; the obtuse angle beta is 97.5-135 degrees;

the incoming air stream impinges the tips of each of the fin plates 110 in the fin tube heat exchanger 37 at an obtuse angle β and is reflected by the fin tip plates 110 into the fin gap to the negative pressure cavity 124 of the heat exchanger.

The flow rate of the air flow entering each fin gap d is equal to the air inlet flow intercepted by the vertical distance delta between the tips of the front fin plate and the rear fin plate 110 of the fin tube heat exchanger on the air inlet section;

delta = d.sin alpha/2, wherein alpha is the apex angle alpha of the long-side extension line of the heat exchanger;

as an alternative embodiment, the apex angle α of the extension line of the long side of the heat exchanger is 15 ° to 110 °.

As an alternative embodiment, the apex angle α of the extension line of the long side of the heat exchanger is 30 ° to 90 °.

As an alternative embodiment, the apex angle α of the extension line of the long side of the heat exchanger is 30 ° to 60 °.

The vertical distance delta between the fin tips of the front and rear fin plates 110 of the fin tube heat exchanger 37 on the air inlet section is 0.13d to 0.7 d.

As a specific embodiment, the air flow speed of the fin gap is 1/3 of the air inlet speed, the vertex angle alpha corresponding to the extension line of the long side of the heat exchanger is 39 degrees, and the incidence obtuse angle beta is 109.5 degrees.

The fin tube heat exchanger 37 has a deep U-shaped horizontal section, two sides of the U-shaped section are longitudinal, and the bottom side is transverse.

In this embodiment, the microscopic process of air flow into and out of the fin plate gap and low velocity flow in the fin plate gap is the central element.

At the section of the air inlet E-E, medium-speed air flow of about 4m/s flowing in from the outer vertical surface of the equipment platform is pushed to the section F-F of the fin gap inlet in a uniform laminar flow mode, the line of the air inlet air flow at the section F-F forms an obtuse angle beta with the fin at the rear side of the gap, and the fin at the rear side of the gap is used as a planer tool to 'plane' a piece of air flow from the air inlet main body air flow to be plugged into the fin gap; the main body air inlet airflow which is "shaved" is intercepted by the blade tip of the "fin shaver" at the F-F position, and the blade tip of the "fin shaver" at the back side of the gap is impacted by an obtuse angle beta, and is diffused and decelerated in the gap of the fins after being reflected by the fins at the front side of the gap; the air flow which is planed by the fin planing tool and is subjected to collision diffusion deceleration is pulled by negative pressure of the negative pressure cavity at about 1.5m/s, and flows out of the fin channel against the resistance of the fin gap channel; the low-speed air flow reaching the G-G section of the fin gap outlet is accelerated again to a medium-speed air flow of about 4m/s under the negative pressure pulling of the negative pressure cavity, and is collected and discharged at the H-H section.

Example 2

As shown in fig. 3 to 8, an air conditioner main unit, in the housing of which the fin tube heat exchanger 37 of embodiment 1, and the air conditioner compressor 121, the gas-liquid separator 126, the four-way valve, the expansion valve, the electric box, the blower 38, and the like are provided.

The finned tube heat exchanger 37 and a part of the shell together form a negative pressure cavity 124 communicated with a heat exchange air path of the finned tube heat exchanger.

Specifically, the bottom plate, side plates, back plate 39, top plate and finned tube heat exchanger 37 of the housing are combined into a negative pressure cavity 124 of the heat exchanger.

Above the fin tube heat exchanger 37, at least 3 fans 38 are provided in the longitudinal direction.

The fan 38 is an axial flow fan.

An air outlet of the negative pressure cavity 124 of the heat exchanger is provided with an air exhaust cavity 33, and an air outlet 331 of the air exhaust cavity 33 is arranged on the same side as the air inlet 125 of the shell.

The air outlet 331 of the air discharge chamber 33 faces the short side of the air conditioner main body case.

The area of the bottom plate below the air outlet of the negative pressure cavity 124 of the heat exchanger, which is adjacent to the back plate, is a ventilation blind area; a fluorine circuit assembly including an air conditioning compressor 121, a gas-liquid separator 126, a four-way valve, an expansion valve, an electric tank, etc. is disposed in a ventilation dead zone inside a negative pressure chamber 124 of the heat exchanger.

As shown in fig. 9, an air conditioning system comprises at least 2 air conditioning hosts, wherein the air conditioning hosts are arranged side by side, an outward V-shaped air channel 157 is formed between the fin tube heat exchangers 37 of adjacent air conditioning hosts, and the opening of the V-shaped air channel 157 is opposite to the opening of the U-shaped fin tube heat exchanger 37.

The distance d between adjacent air conditioning hosts is 3-20 cm.

The included angle gamma of the V-shaped air duct 157 is 50-120 degrees.

The air conditioner host machine of the embodiment implements the building distributed energy system concept that the air conditioner host machine is evacuated from the building roof to enter the common layer, is oriented to the application scene of the outer corridor type equipment platform with the single side open at the common layer, aims at exploring the air inlet and outlet potential and the ventilation and heat exchange potential of the outer facade of the equipment platform, and innovates the structure of the air conditioner host machine:

1 use the deep U-shaped finned tube heat exchanger

The air conditioner main unit adopts a finned tube heat exchanger with a deep U-shaped horizontal section, wherein the side edges of the two sides of the U-shaped finned tube heat exchanger are long edges and are longitudinal, the bottom edge is a short edge and is transverse; the fans are arranged along the direction of the longitudinal long side of the U shape, and at least 2 fans are arranged.

On the equipment platform, the short side of the air conditioner host is parallel to the outer vertical surface, so that the aim of occupying less outer vertical surface and exploring the deep space of the equipment platform is fulfilled.

In the embodiment, starting from the heat exchange quantity Q=KxSxdelta t of the external heat exchanger, a deep U-shaped finned tube heat exchanger is longitudinally arranged in a limited space of an air conditioner host, a large-area heat exchanger ventilation surface is obtained by expanding an air inlet surface of the deep U-shaped finned tube heat exchanger, and a large-area fin heat transfer surface is obtained by expanding the large-area heat exchanger ventilation surface for the second time, so that the fin heat exchange area S of the external heat exchanger of the air conditioner host is effectively enlarged, the heat transfer temperature difference delta t of a heat exchanger body is reduced, the evaporation pressure is increased, and the condensation pressure is reduced.

2 adopting a fin planing tool to plane and obtain the air inlet flow

The transverse width of the back plate of the air conditioner host is larger than the width of the front edge (bottom edge) of the U-shaped finned tube heat exchanger, the side edges of the U-shaped finned tube heat exchanger are in an acute angle relation with the longitudinal air inlet flow line, fins of the side edge finned tube heat exchanger have the function of a fin planing tool, and lower laminar air flows uniformly planing from air inlet air flow of the air conditioner host flow into fin gaps. On the equipment platform, an outward V-shaped air channel with an opening is formed between adjacent hosts, the V-shaped air channel and the U-shaped finned tube heat exchangers are in reverse complementary design, and fin planing cutters on the two adjacent U-shaped finned tube heat exchangers are better divided into air inlet streams which flow in from an outer vertical face;

3 innovation of refrigeration circuit design

In the embodiment, refrigerating loop elements such as a compressor, a four-way valve, an expansion valve, a gas-liquid separator and the like are innovatively arranged at the middle lower part of a negative pressure cavity of the deep U-shaped finned tube heat exchanger, which is close to a back plate of the negative pressure cavity, and the area is exactly a ventilation blind area of the negative pressure cavity of the outer heat exchanger.

The components and the components such as the outer heat exchanger, the refrigerant connecting pipe, the indoor unit heat exchanger and the like form a refrigeration air-conditioning circulation loop according to the sequence of a compressor, a four-way valve, a condenser, an expansion valve, an evaporator, a four-way valve, a gas-liquid separator and a compressor; the compressor is used as refrigeration cycle loop power, a high-low pressure state of a refrigerant is respectively established in a condenser evaporator pipeline, the refrigerant is driven to circularly flow and repeatedly change phase in the refrigeration cycle loop to realize 'heat transfer', namely, heat of low-temperature ambient air flowing through gaps of fins is absorbed through a huge fin heat absorption area S formed by evaporating and absorbing heat of refrigerant liquid in the evaporator pipeline and then rising and connecting a copper pipe, heat is released through high-temperature high-pressure refrigerant gas condensed and released in the condenser pipeline and then released to high-temperature ambient air flowing among the fins through a huge fin heat release area S formed by rising and connecting the copper pipe, and heat transfer from a low-temperature environment where an air conditioner evaporator is located to a high-temperature environment where the condenser is located is realized.

In the embodiment, an air-conditioning main machine adopting a deep U-shaped finned tube heat exchanger is provided with an air exhaust cavity;

when the air conditioner main unit system of the embodiment operates, the negative pressure cavity fan of the deep U-shaped finned tube heat exchanger operates to pump and exhaust air in the negative pressure cavity of the deep U-shaped finned tube heat exchanger, which is communicated with the air suction port of the deep U-shaped finned tube heat exchanger, negative pressure is generated in the cavity, and ambient air outside the outer heat exchanger is pulled to enter the air conditioner main unit at a medium speed of about 4 m/s; after the outside air enters the air conditioner host, the outside air is redispersed and decelerated, flows to a deep U-shaped finned tube heat exchanger with large ventilation section and huge fin sum area, flows through fin gaps of the deep U-shaped finned tube heat exchanger at a low speed and low resistance of less than 1.6m/s, and realizes heat exchange between the ambient air and the refrigerant in the copper tube of the outer heat exchanger; the ambient air enters the negative pressure cavity after heat exchange, and then is gathered and accelerated to flow into a fan air suction port with the lowest pressure, and is boosted by the fan to pass through the air exhaust cavity and is discharged outwards at a high speed of more than 8 m/s.

Example 3

As shown in fig. 10-11, this embodiment discloses an air conditioner main unit, which is different from embodiment 2 in that a backward inclined outer rotor centrifugal fan is adopted as a fan.

The embodiment has all the advantages of the embodiment 2, and the air path power is stronger and the ventilation efficiency is higher due to the adoption of the backward inclined outer rotor centrifugal fan; through the vertical dislocation setting of retroverted external rotor centrifugal fan, can arrange centrifugal fan quantity according to a plurality of centrifugal fan inlet scoop sum width equals outer heat exchanger longitudinal length, set up a plurality of fans and satisfy the amount of wind demand.

In the specific implementation process of the embodiment, both the embodiment and the embodiment 2 are air conditioning hosts of an innovative external heat exchanger air path, and all adopt pneumatic layout of medium-speed air intake at the middle lower part and high-speed air exhaust at the top of the short side, and the main sections of the air intake channel air exhaust channels of the external heat exchanger are taken into the air conditioning hosts; the method comprises the steps of expanding the air inlet surface of the deep U-shaped finned tube heat exchanger in a limited space of an air conditioner main unit to obtain a large-area heat exchanger ventilation surface, and expanding the large-area heat exchanger ventilation surface for the second time to obtain a large-area fin heat transfer surface; the external air flow of the air conditioner main unit enters the air conditioner main unit at a medium speed of about 4m/S, the air inlet air flow in the main unit enters the rear side fins of the fin gaps at an obtuse angle, the air inlet air flow which is planed by the rear side fin planing tool enters the fin gaps, the air inlet air flow is decelerated and dispersed, passes through the deep U-shaped fin tube heat exchanger with a large total ventilation section and a huge total fin heat exchange area S at a low speed of about 1.6m/S for heat exchange, flows into the negative pressure cavity after heat exchange, is collected to the air suction port of the fan under the negative pressure traction of the fan of the external heat exchanger, and is finally discharged from the air discharge cavity at a high speed of about 8m/S after being accelerated and boosted by the fan.

Example 4

As shown in fig. 12 to 15, an air conditioner host equipment platform is provided, in which 1 row of the air conditioner host systems of embodiment 2 or 3 is arranged in the lateral direction.

The embodiment adopts a heavy load equipment platform which is transversely arranged in groups and is loaded by the deep U-shaped finned tube heat exchanger. The outer elevation of the equipment platform is an important resource and is an important resource equal to the area of the equipment platform body, the air inlet speed of an air inlet area on the outer elevation of the equipment platform is increased to a medium speed (more than 4 m/s) and the air outlet speed of an air outlet area is controlled to be a moderately high speed (not more than 12 m/s), the air inlet area on the outer elevation is recombined with the position relation, the area proportion relation and the energy intensity relation of the air inlet area and the air outlet area on the outer elevation, and the heavy-load air conditioner host machine described in the embodiment 2/3 is adopted to construct the high-strength high-efficiency air inlet and outlet outer elevation of the equipment platform, so that the power density of the equipment platform is greatly increased.

The equipment platform is provided with an outer vertical surface 1 for ventilation, and the bottom edge (namely a short edge 156) of the U-shaped fin tube heat exchanger 37 of the air conditioner host system is close to the outer vertical surface 1; an exhaust cavity 33 is arranged above the air conditioner main unit, and an exhaust outlet 331 of the exhaust cavity 33 is close to the outer vertical surface 1.

The outer vertical surface 1 is provided with an air exhaust area 132 and an air inlet area 34; the air exhaust area 132 on the outer vertical surface 1 corresponds to the air outlet 331 of the air conditioner host, and the air inlet area 34 on the outer vertical surface 1 corresponds to the air inlet 125 of the air conditioner host.

The exhaust areas 132 on the facade are arranged continuously at the upper part of the facade and the intake areas 34 on the facade are arranged continuously at the middle lower part of the facade. The boundary between the exhaust area of the facade 1 and the air inlet area of the facade 1 is a horizontal straight line or the boundary is close to the horizontal straight line.

The area of the exhaust area 132 on the facade 1 is 25% -50% of the area of the facade for ventilation. The facade for ventilation refers to a facade with air flow in and out.

And a three-in-one channel 51 for pedestrians, maintenance and setting up copper pipes and cable bridges of the air conditioning system is formed between the backboard 39 of the air conditioning host and the inner wall surface 2 of the equipment platform.

The refrigerant connecting pipe 81 or the chilled water connecting pipe is arranged on the bridge frame 8, the air conditioning host is communicated with the air conditioning indoor units or the fan coils in all areas of all floors of the building through the refrigerant connecting pipe 81 or the chilled water connecting pipe, and the air conditioning host module and the indoor units/the fan coils jointly operate to refrigerate (heat) the indoor space of the building.

The air conditioning main unit of the present embodiment is connected to the indoor heat exchanger 127 to constitute an air conditioning system.

The embodiment adopts an equipment platform, takes a vertical outer vertical surface as a longitudinal direction and a parallel outer vertical surface as a transverse direction;

according to the embodiment, the heavy-load air conditioner hosts are densely arranged transversely along the equipment platform, and the air outlets of the plurality of air conditioner hosts which are isolated from each other on the traditional equipment platform are arranged in a centralized and continuous manner, so that the air exhaust area resources of the air inlet area of the outer vertical face are effectively integrated, and the boundary length between the air exhaust area and the air inlet area is effectively compressed;

in the embodiment, an outward V-shaped air channel with an opening is formed between adjacent hosts on the equipment platform, the V-shaped air channel and the U-shaped finned tube heat exchangers are opposite in opening direction, and are designed in a reverse complementary mode, and fin planing cutters on the two adjacent U-shaped finned tube heat exchangers are better evenly distributed on air inlet air streams which flow from the outer vertical face of the equipment platform;

in the embodiment, a high-speed air exhaust area is arranged at the top of the outer vertical surface of the equipment platform, and a large-area medium-speed air inlet area is arranged at the middle lower part of the equipment platform; the air inlet area and the air exhaust area are complementarily designed, the air inlet area is formed outside the air exhaust area, the cross-sectional area of the air inlet area is enlarged, and the low-resistance high-efficiency air inlet and outlet outer vertical surface of the equipment platform is constructed.

When the heavy-load equipment platforms which are transversely arranged in groups are used for heavy loading of the air conditioner hosts, fans of negative pressure cavities of external heat exchangers of the air conditioner hosts are operated, air in the negative pressure cavities of the deep U-shaped finned tube heat exchangers which are communicated with each other is pumped out, negative pressure is generated in the negative pressure cavities, and ambient air is pulled to penetrate through the outer vertical surfaces of the equipment platforms and enter the air conditioner hosts; after external ambient air enters the air conditioner main unit, air inlet flow enters the rear side fins of the fin gaps at an obtuse angle beta in the air conditioner main unit, the air inlet flow which is planed by the rear side fin planing tool enters the fin gaps, the air inlet flow is decelerated and dispersed, and the air inlet flow passes through the deep U-shaped fin tube heat exchanger with the characteristics of large total ventilation section and huge total fin heat exchange area at a low speed to exchange heat; the ambient air flows into a negative pressure cavity after heat exchange, is collected to a fan air suction port under the negative pressure traction of an external heat exchanger fan, is boosted by the fan to pass through an exhaust cavity, and is injected into the ambient atmosphere at high speed to be diffused and diluted through the top of the outer vertical surface of the equipment platform; the air exhaust speed of the embodiment is more than or equal to 2 times of the air inlet speed, the air exhaust airflow is injected into the atmosphere in a jet flow mode by more than 4 times of the kinetic energy of the air inlet airflow, and the diffusion dilution effect is good.

The embodiment adopts the deep U-shaped finned tube heat exchanger to load the heavy-load equipment platform transversely arranged in groups of the air conditioner host, and has the advantages that:

1 building equipment platform low-resistance high-efficiency air inlet and outlet outer vertical surface

The outer vertical surface of the equipment platform is an important resource equal to the area of the equipment platform body, the air inlet speed of an air inlet area on the outer vertical surface of the equipment platform is increased to a medium speed (more than 4 m/s) and the air outlet speed of an air outlet area is controlled to be a moderately high speed (about 8 m/s), and the outer vertical surface of the equipment platform is recombined to reconstruct the position relationship, the area proportion relationship and the energy intensity relationship of the air inlet surface and the air outlet surface;

according to the embodiment, the heavy-load air conditioner hosts are densely arranged transversely along the equipment platform, and the air outlets of the plurality of air conditioner hosts which are isolated from each other on the traditional equipment platform are arranged in a centralized and continuous manner, so that the air exhaust area resources of the air inlet area of the outer vertical face are effectively integrated, and the boundary length between the air exhaust area and the air inlet area is effectively compressed;

in the embodiment, a horizontal V-shaped air channel with an opening pointing to the outer vertical surface is formed between adjacent hosts on an equipment platform, the V-shaped air channel on the equipment platform and the U-shaped finned tube heat exchangers are in reverse complementary design, and fin planing cutters on the two adjacent U-shaped finned tube heat exchangers are better evenly distributed on air inlet airflow flowing in from the outer vertical surface of the equipment platform;

in the embodiment, a high-speed air exhaust area is arranged at the top of the outer vertical surface of the equipment platform, and a large-area medium-speed air inlet area is arranged at the middle lower part of the equipment platform; the air inlet area and the air exhaust area are complementarily designed, and the air inlet area is formed outside the air exhaust area, so that the cross-sectional area of the air inlet area is enlarged;

the embodiment constructs the high-strength and high-efficiency equipment platform wind inlet and outlet outer vertical surface, and prepares the basic condition for greatly improving the power density of the equipment platform.

2 pressure reducing equipment platform occupation area and building outer elevation width

In the embodiment, the heavy-load air conditioner main unit described in embodiment 2/3 is adopted, and a fin heat transfer surface with a huge area is secondarily unfolded on a ventilation surface of a deep U-shaped large-area fin tube heat exchanger in a limited space of the air conditioner main unit, so that the total fin heat transfer area of an external heat exchanger of the air conditioner main unit is effectively enlarged, the heat transfer temperature difference of a heat exchanger body is reduced, the evaporation pressure is increased, and the condensation pressure is reduced, thereby forming a heavy-load special condition; in the chain type flow of medium-speed air intake, dispersion and deceleration of the air flow of the external heat exchanger, heat exchange of a huge amount of fins on a huge ventilation surface, collection and acceleration, boosting of a fan and high-speed discharge, the fan is used as a power source, the fin of the huge amount of heat exchanger is used as the lowest speed area of the air flow, an air path structure of efficient heat exchange inside an air conditioner host is constructed, and the heavy load characteristic of the air conditioner host is reflected.

According to the embodiment, on the basis of an air conditioner host with heavy load characteristics, a new air channel of an external heat exchanger is built in the air conditioner host through an equipment platform layout mode innovation, an air exhaust channel function of an idle space at the top of the equipment platform is developed, the transverse space among the air conditioner hosts is compressed, a pedestrian channel, a maintenance channel and a copper pipe cable bridge channel are integrated, so that the occupied area of an ineffective space and a ventilation blind area on the equipment platform is greatly compressed, the average refrigerating and heating power density (namely the refrigerating capacity and heating quantity per unit area) of the equipment platform is improved to be more than 25kw per square meter from the current situation of about 11.6kw per square meter, and the average refrigerating and heating power density (namely the refrigerating capacity and heating quantity per unit area) of the equipment platform is greatly increased by more than 100%; under the same refrigeration load, the occupied area of the equipment platform is saved by 1/2.

According to the embodiment, through the inner and outer heat exchangers of the recombination air conditioner host, the air inlet and outlet paths of the outer heat exchangers, the spatial structural relation between the recombination air conditioner host and the equipment platform, and the relation between the air inlet area and the air outlet area on the outer elevation of the recombination equipment platform, the floor area of the equipment platform is greatly reduced under the same building heat load condition, the lateral width of the outer elevation of the building equipment occupied by the air inlet area and the air outlet area of the air conditioner host is greatly reduced, and ventilation lighting and visual communication between the inner space and the outer environment of the same-layer building are effectively ensured.

(3) Convenient air conditioner main machine detection maintenance

The air conditioner host machine adopted in the embodiment is characterized in that fluorine circuit components such as a compressor, a gas-liquid separator, a four-way valve, an expansion valve, an electric box, a fan and the like are intensively arranged in a negative pressure cavity of a heat exchanger;

according to the embodiment, the backboard of the negative pressure cavity of the heat exchanger of the air conditioner host machine faces the inner side maintenance channel of the equipment platform, so that the air conditioner host machine is convenient to check and maintain: when a fault occurs, the negative pressure cavity backboard of the external heat exchanger of the air conditioner host is opened on the maintenance channel at the inner side of the equipment platform, and the compressor, the gas-liquid separator, the four-way valve, the expansion valve, the electric box, the fan and other fluorine circuit components which possibly have faults are completely removed, so that the inspection and maintenance are very convenient, and the embodiment solves the problem of the inspection and maintenance of the air conditioner host.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (17)

1. The fin tube heat exchanger is characterized in that the horizontal section of the fin tube heat exchanger is U-shaped, two sides of the U-shaped fin tube heat exchanger are long sides, and the bottom side is a short side; the length ratio of the long side to the short side is 2-6:1.

2. The fin tube heat exchanger of claim 1, wherein the fins are vertically disposed, arranged in a horizontal direction; the length ratio of the long side to the short side is 3-4:1.

3. The fin tube heat exchanger according to claim 2, wherein,

one side of the section of the fin tube heat exchanger perpendicular to the long sides of the fins is a heat exchanger air inlet surface, and the other side is a heat exchanger air outlet surface; the air outlet surface belongs to the negative pressure cavity area of the heat exchanger;

the inlet face of the air inlet flow is a finned tube heat exchanger, and the intersection angle between the air inlet flow and the tip of each fin plate on the finned tube heat exchanger is an obtuse angle; the obtuse angle beta is 97.5-135 degrees;

the air inlet flow hits the tip of each fin plate in the fin tube heat exchanger at an obtuse angle beta, and is reflected by the fin tip plate to enter the fin gap to flow to the negative pressure cavity of the heat exchanger.

4. The fin tube heat exchanger according to claim 3, wherein,

the flow rate of the air flow entering each fin gap d is equal to the air inlet flow intercepted by the vertical distance delta between the tips of the front fin plate and the rear fin plate of the fin tube heat exchanger on the air inlet section;

delta = d.sin alpha/2, wherein alpha is the apex angle alpha of the long-side extension line of the heat exchanger;

the vertical distance delta value of the tips of the front fin plate and the rear fin plate of the fin tube heat exchanger on the air inlet section is 0.13 d-0.7 d.

5. The fin tube heat exchanger of claim 4, wherein,

the air flow speed of the fin gap is 1/3 of the air inlet speed, the vertex angle alpha corresponding to the extension line of the long side of the heat exchanger is 39 degrees, and the incidence obtuse angle beta is 109.5 degrees.

6. An air conditioner host, characterized in that the finned tube heat exchanger of any one of claims 1-5, an air conditioner compressor, a gas-liquid separator, a four-way valve, an expansion valve, an electric box and a fan are arranged in a shell of the air conditioner host;

the finned tube heat exchanger and at least part of the shell jointly form a negative pressure cavity communicated with a heat exchange air path of the finned tube heat exchanger.

7. The air conditioner main unit according to claim 6, wherein at least 2 fans are provided above the fin tube heat exchanger in a longitudinal direction.

8. The air conditioner main unit according to claim 6, wherein the fan is an axial flow fan or a centrifugal fan.

9. The air conditioner main unit according to claim 6, wherein the air conditioner compressor, the gas-liquid separator, the four-way valve, the expansion valve and the electric box are arranged in a middle-lower ventilation blind area of the negative pressure cavity of the fin tube heat exchanger, which is close to the backboard of the air conditioner main unit.

10. An air conditioner host system, characterized by comprising at least 2 air conditioner hosts according to any one of claims 6-9, wherein the air conditioner hosts are arranged side by side, an outward V-shaped opening air channel is formed between the fin tube heat exchangers of adjacent air conditioner hosts, and the opening of the V-shaped air channel is opposite to the opening of the U-shaped fin tube heat exchanger.

11. The air conditioning mainframe system according to claim 10, wherein a distance d between adjacent air conditioning mainframes is 3 to 20cm.

12. The air conditioning system according to claim 10, wherein the V-shaped duct has an included angle γ of 50 ° to 120 °.

13. An air conditioner host equipment platform, characterized in that at least 1 group of air conditioner host systems according to any one of claims 10 to 12 are arranged in the equipment platform along the transverse direction; the equipment platform is provided with an outer vertical surface for ventilation, and the bottom edge of the U-shaped finned tube heat exchanger of the air conditioner host system is close to the outer vertical surface; an exhaust cavity is arranged above the air conditioner main unit, and an exhaust outlet of the exhaust cavity is arranged and/or is close to the outer vertical surface.

14. The air conditioner host device platform of claim 13, wherein a vent area and an air inlet area are provided on the facade; the air exhaust area on the outer vertical surface corresponds to the air exhaust cavity of the air conditioner main unit, and the air inlet area on the outer vertical surface corresponds to the air inlet of the air conditioner main unit.

15. The air conditioner host device platform of claim 14, wherein the air discharge areas on said facade are continuously arranged at an upper portion of said facade and the air intake areas on said facade are continuously arranged at a lower portion of said facade.

16. The air conditioner host device platform of claim 14, wherein the area of the exhaust area on the facade is 25% to 50% of the area of the facade for ventilation.

17. The air conditioning host equipment platform of claim 13, wherein a three-in-one channel for walks, maintenance and installation of copper tubing and cable trays of an air conditioning system is formed between the back plate of the air conditioning host and the interior wall of the equipment platform.