CN219756527U - Fin tube heat exchanger and multi-system heavy-load air conditioner host and equipment platform thereof - Google Patents
Fin tube heat exchanger and multi-system heavy-load air conditioner host and equipment platform thereof Download PDFInfo
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- CN219756527U CN219756527U CN202321206935.6U CN202321206935U CN219756527U CN 219756527 U CN219756527 U CN 219756527U CN 202321206935 U CN202321206935 U CN 202321206935U CN 219756527 U CN219756527 U CN 219756527U
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Abstract
The utility model belongs to the technical field of efficient energy-saving air conditioners, and discloses a finned tube heat exchanger, a multi-system heavy-load air conditioner host and an equipment platform. The fin tube heat exchangers are arranged in parallel along the short side direction of the fin plate and penetrate through the heat exchange tube groups of the fin plate; the heat exchange tube group is connected to different compressors to construct different air conditioning unit hosts; the air conditioner host comprises at least two air conditioner unit hosts; an air conditioner host is transversely arranged in the air conditioner host equipment platform. The combination of a plurality of small-power air conditioning unit hosts in a plurality of groups of air conditioning hosts can more efficiently meet the wide variation and partition variation of the building heat load, and the elasticity of an air conditioning system is increased. The utility model also comprises an air conditioning unit host and an air energy water heater host, and the air conditioning unit host and the air energy water heater host are combined into a whole. The utility model improves the utilization coefficient of the whole two-in-one finned tube heat exchanger and improves the COP of two sets of systems of an air conditioning unit host and an air conditioning unit host (air energy water heater host).
Description
Technical Field
The utility model belongs to the technical field of efficient energy-saving refrigeration air conditioners, and particularly relates to a finned tube heat exchanger, a multi-system heavy-load air conditioner host and an equipment platform thereof.
Background
The corridor type equipment platform refers to a certain floor of a high-rise building, and the total or most of the effective area of the corridor is used for arrangement of equipment such as air conditioners. The external heat exchanger module of the prior commercial central air conditioner main machine is mainly configured by taking a finned tube heat exchanger and an ejector air axial flow fan as a standard. The multi-split commercial central air conditioning host used in high-rise or super high-rise buildings is generally arranged in the corridor type equipment platform, so that the space and air energy resources of the equipment platform are utilized in a high-efficiency and intensive mode, the construction cost of the equipment platform is reduced, and meanwhile the high-efficiency utilization of the energy resources is realized.
The current situation is that the air conditioning host machines such as the multi-split air conditioner and the air cooling water machine module and the like are used for 'air outlet' and the structural relation between the host machines and the building, or the air conditioning host machines are the original host machines, the equipment platform is the traditional corridor type structural space, only the spatial displacement of the air conditioning host machines is implemented, and the two air conditioning host machines are not suitable for the structural relation requirement of the distributed energy system of the building.
The existing multi-split air conditioner, air-cooled water machine modules and other commercial central air conditioner hosts with 'upper air outlet', and the structural relationship between the air conditioner hosts and the outer corridor type equipment platform still have a plurality of technical problems, including:
the rated power of the air conditioner host is large and the output elasticity is small. The current air conditioner host machine has large refrigerating and heating rated power, which is more than tens of kilowatts, hundreds of kilowatts and even thousands of kilowatts; although the frequency conversion technology provides the possibility of adjusting the load output of the air conditioner host, if the frequency conversion technology is adopted to widely adjust the power output of the air conditioner host, the problem of greatly reducing the efficiency (COP) of the air conditioner host under low load rate exists; how to reduce the rated capacity of a unit host and stabilize the COP of a refrigeration air-conditioning system under the conditions of low load and low load rate is an important problem in the design of building heating ventilation air-conditioning.
On the existing house equipment platform of the smart dress room, an air conditioner host computer and an air energy water heater host computer are mutually separated and are respectively and independently arranged, and heat exchanger resources of a refrigeration system which stops running are not fully utilized, so that equipment and energy are wasted, and the problem is also an important problem in the design of building heating ventilation air conditioning.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a finned tube heat exchanger.
Another object of the present utility model is to provide a multi-system heavy-duty air conditioning host.
Another object of the present utility model is to provide an air conditioner host device platform.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a finned tube heat exchanger comprising a fin plate and a heat exchange tube; a plurality of fin plates which are parallel to each other and are separated by a certain interval form a fin group;
heat exchange tubes are arranged in a penetrating manner along the direction perpendicular to the fin plates; at least 2 heat exchange tube groups penetrating through the fin plates are arranged in parallel along the short side direction of the fin plates; the heat exchange tubes in the heat exchange tube group are arranged along the long side direction of the fin plate; the heat exchange tube groups are arranged side by side in parallel and are connected to compressors of different refrigeration air conditioning systems; the fins between the heat exchange tube groups form fin heat bridges in the transverse and vertical directions.
Further, the heat exchange tube groups in the same row are connected in parallel to the fluorine pipeline of the same refrigeration air-conditioning system.
A finned tube heat exchanger comprising a fin plate and a heat exchange tube; a plurality of fin plates which are parallel to each other and are separated by a certain interval form a fin group; heat exchange tubes are arranged in a penetrating manner along the direction perpendicular to the fin plates; at least 2 heat exchange tube groups penetrating through the fin plates are arranged in parallel along the short side direction of the fin plates; wherein at least 1 group of heat exchange tube groups are air energy water heater heat exchange tube groups; the heat exchange tubes in the heat exchange tube group are arranged along the long side direction of the fin plate.
Further, the fin plate comprises at least 2 heat exchange tube groups for the air conditioning system, the air energy water heater heat exchange tube groups are positioned between adjacent heat exchange tube groups for the air conditioning system, and fins between the heat exchange tube groups form a heat bridge in the transverse and longitudinal directions.
A multi-system heavy-load air conditioner host comprises a shell, a finned tube heat exchanger, a fan and at least 2 groups of compressor modules which are composed of an air conditioner compressor and a gas-liquid separator;
at least 2 groups of gas-liquid separators, air conditioner compressors, four-way valves, heat exchanger assemblies, expansion valves and refrigerant pipelines of the air conditioner indoor units are sequentially communicated to construct at least 2 groups of refrigerant circulation loops of the refrigeration air conditioner systems, so that at least 2 independent operation air conditioner unit hosts are formed;
a fin tube heat exchanger assembly is formed by at least 2 flat plate type fin tube heat exchangers; or a V-shaped finned tube heat exchanger formed by bending a flat plate type finned tube heat exchanger, namely a finned tube heat exchanger assembly; or the fin tube heat exchanger assembly is formed by a flat plate type fin tube heat exchanger and the V-shaped fin tube heat exchanger formed by bending the flat plate type fin tube heat exchanger.
The section of the fin tube heat exchanger assembly perpendicular to the long sides of the fins is a folded line type; the fin long sides of the fin tube heat exchanger are arranged in the vertical direction or close to the vertical direction;
The finned tube heat exchanger assembly is arranged on the air inlet surface of the air inlet of the shell, and forms a heat exchanger assembly negative pressure cavity communicated with a heat exchange air path of the finned tube heat exchanger assembly with at least part of the shell;
a negative pressure cavity air outlet is arranged on a top plate or a back plate of the negative pressure cavity of the heat exchanger assembly, and a fan and an exhaust cavity are arranged at the negative pressure cavity air outlet.
Further, the exhaust cavity is a cavity with a one-way exhaust outlet and comprises a vertical exhaust cavity and a horizontal exhaust cavity which are mutually communicated; the air outlet of the air exhaust cavity is arranged on the transverse air exhaust cavity and far away from the vertical air exhaust cavity.
Further, the rear side of the back plate of the vertical exhaust cavity is provided with a compressor cavity for installing a fluorine circuit assembly comprising an air conditioner compressor, a four-way valve, an expansion valve and an electric box.
Further, the section of the fin tube heat exchanger assembly perpendicular to the long sides of the fins is V-shaped or N-shaped, or at least 2 fin tube heat exchangers perpendicular to the sections of the fins are V-shaped and are continuously arranged;
preferably, the section of the fin tube heat exchanger assembly perpendicular to the long sides of the fins is W-shaped; preferably, the apex angle alpha of the V-shaped fin tube heat exchanger is 15-110 degrees.
Preferably, the apex angle alpha of the V-shaped fin tube heat exchanger is 30-90 degrees.
Preferably, the apex angle alpha of the V-shaped fin tube heat exchanger is 30-60 degrees.
Further, the finned tube heat exchanger assembly is a negative pressure cavity air inlet of the heat exchanger assembly; the exhaust outlet of the exhaust cavity is arranged on the same side with the air inlet in the shell.
Further, the exhaust cavity is arranged below the bottom plate of the negative pressure cavity of the heat exchanger assembly or above the top plate of the negative pressure cavity of the heat exchanger assembly.
Preferably, the exhaust cavity is a cavity with a one-way exhaust port and comprises a vertical exhaust cavity and a horizontal exhaust cavity which are mutually communicated; the air outlet of the air exhaust cavity is arranged on the transverse air exhaust cavity and is far away from the vertical air exhaust cavity; the transverse exhaust cavity is arranged below the bottom plate of the negative pressure cavity of the heat exchanger assembly or above the top plate of the negative pressure cavity of the heat exchanger assembly.
Preferably, the air outlet of the air exhaust cavity faces the short side of the air conditioner main body shell.
Further, at least 2 fans are arranged at the air outlet of the negative pressure cavity; preferably, the fans are arranged in the same vertical plane.
Further, the fan is an axial flow fan or a centrifugal fan. Preferably, the fan is a backward inclined outer rotor centrifugal fan.
Further, each unit host independently controls the operation state.
Further, the air energy water heater heat exchange tube group is connected with a unit host of the air energy water heater; the rest heat exchange tube groups are connected with an air conditioning unit host of the air conditioning system.
An air conditioner host equipment platform is internally provided with at least 1 group of air conditioner hosts along the transverse direction; the equipment platform is provided with an outer vertical face for ventilation, and an air inlet of an air conditioner main unit finned tube heat exchanger assembly of the air conditioner main unit system is close to the outer vertical face; the air outlet of the air exhaust cavity is arranged and/or is close to the outer elevation.
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 machine, and the air inlet area on the outer vertical surface corresponds to the air inlet of the air conditioner main machine.
Further, the exhaust area on the outer vertical surface is continuously arranged at the upper part of the outer vertical surface, the air inlet area on the outer vertical surface is continuously arranged at the middle lower part of the outer vertical surface, and the boundary between the exhaust area of the outer vertical surface and the air inlet area of 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 vertical surface is 25% -50% of the area of the outer vertical surface for ventilation.
Further, a three-in-one channel for walking, maintaining and arranging 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) increases the elasticity of the air conditioning system
The distributed energy system of the building requires the air conditioning system to have good output elasticity, so as to meet various load demands;
according to the utility model, a plurality of sets of heat exchange tube groups of the refrigerating air-conditioning system are arranged in one set of fin tube heat exchanger assembly, one set of heat exchange tube groups is divided into two sets and one set of heat exchange tube groups is divided into three sets, a plurality of low-power unit hosts (including an air-conditioning compressor, a four-way valve, an expansion valve and a fluorine circuit assembly of an electric box) are arranged in one air-conditioning host shell, the rated capacity of each unit host is reduced, the wide variation and the partition variation of the heat load of a building are more effectively met through the combination of the plurality of low-power air-conditioning unit hosts, the COP of the refrigerating air-conditioning system under the conditions of low load and low load rate is stabilized, and the elasticity of the air-conditioning system is increased.
(2) High-efficiency heat exchange air path structure of air conditioner main unit finned tube heat exchanger assembly is constructed, and energy density and energy efficiency ratio of air conditioner main unit are improved
The utility model takes a horizontal V-shaped fin tube heat exchanger as a basic unit of an air conditioner main machine fin tube heat exchanger assembly, a plurality of horizontal V-shaped fin tube heat exchangers are continuously arranged in a limited space of the air conditioner main machine in parallel to the air inlet surface direction of an air inlet of the air conditioner main machine, the air inlet surfaces of the plurality of horizontal V-shaped fin tube heat exchangers are spread to obtain a ventilation surface of the large-area fin tube heat exchanger assembly, and the ventilation surface of the large-area fin tube heat exchanger assembly is spread for the second time to obtain a large-area fin heat transfer surface.
In the chain type flow of medium-speed air intake of the air flow of the heat exchanger, dispersion and deceleration of the fin planing tool, heat exchange on a huge amount of fin heat exchange area S on a huge total ventilation surface, collection and acceleration, fan boosting and high-speed discharge, the air flow takes the fan as a power source, takes a negative pressure cavity as a core, takes a fin gap of the huge amount of continuously arranged V-shaped fin heat exchanger as a lowest speed area, and completes pressurization of the primary fan and static pressure-dynamic pressure conversion of the front and rear of the fan, thereby being efficient and smooth and constructing the air path structure of efficient heat exchange in the air conditioner.
The utility model takes a horizontal V-shaped finned tube heat exchanger as a basic unit of an air conditioner host finned tube heat exchanger assembly, wherein two flat plate type finned tube heat exchangers forming the horizontal V-shaped finned tube heat exchanger comprise a plurality of refrigerant branches of a plurality of refrigeration systems, the plurality of refrigerant branches share a set of fin groups, and the set of fin groups comprise a plurality of fins which are parallel to each other.
According to the refrigeration system heat exchanger in the running state, the fin heat exchange area of the refrigeration system heat exchanger in the running stop state can be acquired through the fin transverse heat bridge effect, so that the fin heat exchange area of the running system heat exchanger is enlarged, and the purposes of improving the evaporation pressure, reducing the condensation pressure, reducing the exhaust temperature of the compressor, increasing the refrigeration and heating power and improving the energy efficiency ratio are achieved.
(3) 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 dead zone of the middle lower part of the heat exchanger assembly negative pressure cavity close to the back plate, and the back plate of the heat exchanger assembly negative pressure cavity is set on the short side of the air conditioner host, when the air conditioner host is installed on the equipment platform, the back plate of the heat exchanger assembly negative pressure cavity faces the maintenance channel of the inner side of the equipment platform.
The components of the air conditioner host which may be in fault are usually fluorine path movement structural members 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 main unit facilitates inspection and maintenance: when a fault occurs, the backboard is opened on the maintenance channel at the inner side of the equipment 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 inspection and maintenance are very convenient, and the history inspection and maintenance problems of the air conditioner host are solved.
(4) The classical condition top outlet central air conditioner host is created for constructing a side inlet and side outlet air path structure by matching with the outer vertical surface of the equipment platform, and 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 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, thus preparing conditions for installing the air conditioner host side air outlet structure on the equipment platform and constructing the air conditioner host side air outlet structure by matching with the outer elevation of the equipment platform.
According to the utility model, under the design concept that the air inlet area of the air conditioner host is equal to the air exhaust area of approximately 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 negative pressure cavity of the heat exchanger assembly of the air conditioner host are effectively improved, and the range and diffusion dilution effect of the air conditioner host air exhaust jet penetrating through the outer vertical surface of the equipment platform and entering the ambient atmosphere are effectively improved.
(5) 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 utility model, through the inner and outer heat exchangers of the recombination air conditioner host and the air inlet and outlet paths of the outer heat exchangers, the power density of the air conditioner host is improved, and the recombination air conditioner host and the equipment platform are in structural relation, so that the inefficient dead space is greatly reduced, the occupied area of the equipment platform is greatly reduced under the same building heat load condition, the lateral width of the outer vertical surface of the building equipment occupied by the air inlet and outlet surfaces of the air conditioner host is greatly reduced, and ventilation lighting and visual communication between the inner space of the same-layer building and the external environment are ensured.
Drawings
FIG. 1 is a schematic diagram of the total temperature difference of the condensing temperature and the evaporating temperature of a refrigerating system, which is formed by accumulating the heat transfer temperature difference of a condenser body and the heat transfer temperature difference of an evaporator body of an air conditioning system, namely the heat transfer temperature difference of a high-temperature low-temperature heat source and the heat transfer temperature difference of 3;
FIG. 2 is a schematic diagram of a refrigeration cycle of a pressure enthalpy diagram with increased evaporating pressure due to increased heat exchange area of the fins of the outer heat exchanger of the refrigeration air conditioning system, resulting in increased heat absorption per unit mass of refrigerant in the refrigeration system, reduced compression work, increased COP, increased refrigerant circulation in the refrigeration system, and increased heat release from the evaporator heat absorption condenser;
FIG. 3 is a schematic diagram of a fin transverse and longitudinal heat bridge of a multi-branch dual-system flat plate type finned tube heat exchanger of embodiment 1, wherein two branches of two sets of refrigeration systems are arranged on the left and right sides;
FIG. 4 is a schematic view of a plate fin tube heat exchanger of three legs per system of the dual refrigeration system of example 1;
FIG. 5 is a schematic three-dimensional schematic diagram of a fin tube heat exchanger assembly of an air conditioner host of a dual refrigeration system with a horizontal V-shaped fin tube continuous arrangement according to example 2;
FIG. 6 is a horizontal cross-sectional view of the air conditioner main unit in operation, wherein a fin planer tool at the inlet of a fin gap intercepts the air inlet flow to enable the air inlet flow to be decelerated and enter the fin gap for heat exchange and then discharged;
Fig. 7 is a three-dimensional schematic diagram of a dual refrigeration system air conditioning host according to embodiment 3;
fig. 8 is 3 horizontal sectional views of the air conditioning main unit of the dual refrigeration system of embodiment 3;
fig. 9 is a schematic diagram of a dual-system air conditioning principle of the dual-refrigeration system air conditioning host according to embodiment 3;
fig. 10 is a schematic diagram of a dual refrigeration system air conditioning host according to embodiment 4;
FIG. 11 is a schematic view of a transverse and longitudinal heat bridge of a fin of a multi-leg dual system flat plate type finned tube heat exchanger of example 5;
FIG. 12 is a schematic diagram of an air-conditioning water heating system with an external heat exchanger of an air-energy water heater embedded in an external heat exchanger of an air-conditioning main unit according to embodiment 6;
fig. 13 is a schematic view showing the vertical structure of a platform of a dual refrigeration system air conditioning host apparatus according to embodiment 7;
FIG. 14 is a top view of the operational airflow from a dual refrigeration system air conditioning apparatus platform according to example 7;
FIG. 15 is a schematic view of the relationship between the air intake area and the air exhaust area on the outer elevation of the equipment platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. 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 application.
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.
The utility model focuses the evaporating pressure (evaporating temperature) and takes it as the first factor of the refrigerating air conditioning system, the utility model discovers that the evaporating pressure determines the density of the low-pressure refrigerant gas sucked by the compressor and the compression ratio of the compressor, if the evaporating pressure of the heat pump air conditioner main engine external heat exchanger (evaporator) is increased from 5 kg to 6 kg in winter, the circulating amount of the refrigerant, the heat absorption capacity of the evaporator and the heat release capacity of the condenser are increased by 20% synchronously, and the compression ratio of the compressor and the exhaust temperature of the compressor fall due to sound.
On the basis that the evaporating pressure (evaporating temperature) is the first factor of a refrigerating and air-conditioning system, the utility model innovatively provides the key factors of improving the evaporating pressure of the current air-conditioning host, reducing the condensing pressure and improving the heat exchange capacity of the external heat exchanger of the air-conditioning host by analyzing the relation Q=KxSxdelta t between the heat exchange quantity Q and the total heat transfer coefficient K of the finned tube heat exchanger such as the condenser of the air-conditioning evaporator, the heat exchange area S and the heat transfer temperature difference delta t between the refrigerant and the air, and the utility model further innovatively provides the technical judgment of increasing the total heat transfer area S of the finned tube heat exchanger.
In the heat exchange quantity q=kxsχΔt of the heat exchanger, it is no longer effective to greatly increase the heat exchange quantity Q route by enlarging the total heat transfer coefficient K and the heat transfer temperature difference Δt of the heat exchanger body. Because the utility model finds that the corrugated fins, the slotted fins and the internal thread copper pipe are widely applied to the current condenser of the evaporator of the refrigeration air-conditioning system, the total heat transfer coefficient K of the external heat exchanger of the air-conditioning host is close to the peak value, and the marginal effect of improving the K value by optimizing the fin structure, the copper pipe structure and the air flow interrelationship of the fin copper pipe is greatly reduced. Under the conditions of a determined low-temperature heat source and a determined high-temperature heat source, namely under the conditions that the thermophysical parameters such as the temperature, the humidity and the like of a high-temperature medium low-temperature medium where the condenser evaporator operates are specifically determined, the heat exchange quantity Q is expected to be increased by expanding the heat transfer temperature difference delta t of the condenser body of the evaporator, and the heat exchange quantity Q is not effective any more; because the delta t between the low-temperature medium (such as indoor low-temperature air in summer) between the evaporator fins and the refrigerating fluid in the copper pipe is enlarged, the evaporation temperature and the evaporation pressure are necessarily reduced; if delta t between high-temperature high-pressure refrigerant gas in the copper pipe of the condenser and high-temperature medium (such as summer high-temperature ambient air) between the fins is enlarged, the condensing pressure and condensing temperature are necessarily raised; therefore, the scheme of expanding the heat transfer temperature difference delta t of the heat exchanger bodies such as the evaporator condenser and the like to improve the heat exchange quantity Q of the heat exchanger just damages the refrigerant circulation quantity, the heat absorption capacity, the heat release capacity and the COP of the whole refrigeration system.
Therefore, under the conditions that the materials and the structures of the heat exchanger are optimized deeply and the target value of the system COP is continuously improved, the potential of increasing K and delta t to increase Q is exhausted, and the innovative proposal of the utility model is to enlarge the heat exchange area S of the heat exchanger and reduce the condensing pressure to improve the evaporating pressure, improve the heat exchange capacity of the heat exchanger and improve the refrigerating capacity and the system COP of the refrigerating and air-conditioning system.
Because, as shown in FIG. 1, the difference in the evaporating temperature (T 2 -t 2 ) Is the fundamental factor for determining the COP of the core index of the refrigeration and air-conditioning system, this (T 2 -t 2 ) High then the COP is low, this (T 2 -t 2 ) The COP is high when the COP is low, and the difference between the COP of the refrigeration and air-conditioning system and the evaporating temperature of the condensing temperature (T 2 -t 2 ) Inverse correlation; and the difference between the condensing temperature and the evaporating temperature (T 2 -t 2 ) And the heat transfer temperature difference (T) 2 -T 1 ) Low temperature heat source temperature difference (T) 1 -t 1 ) Heat transfer temperature difference (t) of evaporator body 1 -t 2 ) These 3 differences are accumulated. Therefore, the temperature difference of the low temperature heat source at the high temperature heat source (T 1 -t 1 ) As objective condition that can not be changed, the utility model reduces the heat transfer temperature difference (T) 2 -T 1 ) Heat transfer temperature difference (t) of evaporator body 1 -t 2 ) Is to reduce the difference (T) 2 -t 2 ) The only paths of the system are the only paths of reducing the condensation pressure (condensation temperature), increasing the evaporation temperature (evaporation pressure), increasing the circulation quantity of the refrigerant, increasing the heat absorption quantity of the evaporator, the heat release quantity of the condenser and increasing the COP of the refrigerating and air conditioning system.
As shown in fig. 2, the heat transfer area S of the fin sum of the fin tube heat exchangers is enlarged to reduce the heat transfer temperature difference of the body of the evaporator condenser, improve the evaporating pressure and reduce the condensing pressure, so that the aims of improving the circulation quantity of the refrigerant, the heat absorption quantity of the evaporator, the heat release quantity of the condenser and the COP of the refrigerating system are fulfilled. The technical effect of enlarging the heat exchange area of the total fins of the external heat exchanger is particularly reflected in the improvement of the evaporation temperature and the evaporation pressure of the evaporator.
The evaporating pressure is the first factor of the heat pump system, and the influence on the performance of the heat pump system of the refrigerating system is shown in fig. 2 (the ordinate is the condensing pressure, the abscissa is the enthalpy value, 1-2-3-4 in the figure is the original circulation path, and 1-2-3'-4' is the circulation path of the utility model):
(1) Increased evaporation pressure (P) 1 →P 1 ' directly brings about the increase (h) of the heat absorption capacity of the refrigerant in unit mass of the refrigerating system 4 ’－h 4 ) Compressor compression work reduction (h) 4 ’－h 4 ) The energy efficiency ratio is improved;
(2) Increased evaporation pressure (P) 1 →P 1 ') and directly brings about the increase of the refrigerant circulation quantity (P) of the fixed-frequency heat pump system 1 ’/P 1 -1) x 100% with an increase in evaporator heat absorption power and condenser heating power (P) 1 ’/P 1 －1)×100％；
(3) The increase in the evaporating pressure also directly leads to a reduction in the compression ratio and a reduction in the compressor discharge temperature, effectively suppressing the deterioration of the lubricating oil and the deterioration of the compressor motor insulation performance.
Example 1
Based on the above thermodynamic analysis, the present embodiment aims to expand the fin total heat transfer area S of the fin tube outer heat exchanger among the three factors K, S, Δt constituting the heat transfer capacity Q of the outer heat exchanger.
As shown in fig. 3 to 4, a fin tube heat exchanger includes 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; heat exchange tubes 115 are inserted in a direction perpendicular to the plane of the fin plate 110;
along the short side direction of the fin plate 110, 2 groups of heat exchange tube groups 116 penetrating the fin plate are arranged side by side in parallel;
the heat exchange tubes 115 in the heat exchange tube group 116 are arranged in the longitudinal direction of the fin plate 110;
as shown in fig. 3, in the present embodiment, 6 heat exchange tube groups 116 are arranged in the longitudinal direction of the fin plate 110.
The heat exchange tube groups 116 are arranged side by side in parallel and are connected to different air conditioning compressors, respectively. Namely, two ends of the heat exchange tube group I117 are respectively connected with a fluorine liquid tube 112 and a fluorine gas tube 113 of the air conditioner compressor I121.
The heat exchange tube group II 118 is connected to the fluorine line liquid tube 111 and the fluorine line gas tube 114 of the air-conditioning compressor II 122, respectively.
The heat exchange tube groups 116 of the same row are connected in parallel to the fluorine line pipe of the same air conditioner compressor.
Namely, the heat exchange tube group I117 and the heat exchange tube group III 119 in the same row are connected with the fluorine line liquid tube 112 and the fluorine line air tube 113 of the air conditioner compressor I;
the heat exchange tube group II 118 and the heat exchange tube group IV 120 of the same row are connected with the fluorine liquid tube 111 and the fluorine gas tube 114 of the air-conditioning compressor II.
The heat exchange tube groups 116 arranged side by side in parallel in this embodiment are connected to different air conditioning compressors, respectively. The fin heat exchanger 37 in the running state can evaluate the fin heat exchange area of the fin heat exchanger of the refrigerating system in the running stopping state through the fin transverse heat bridge effect, so that the fin heat exchange area of the running system heat exchanger is enlarged, and the purposes of improving the evaporating pressure, reducing the condensing pressure, reducing the exhaust temperature of the compressor, increasing the refrigerating and heating power and improving the energy efficiency ratio are achieved.
Example 2
As shown in fig. 5, a fin tube heat exchanger assembly is constituted by 4 fin tube heat exchangers 37 of example 1.
The section of the fin tube heat exchanger assembly perpendicular to the fins 110 is a broken line type; the fin long sides of the fin tube heat exchanger 37 are arranged in the vertical direction or close to the vertical direction;
The section of the fin tube heat exchanger assembly perpendicular to the fins 110 is W-shaped, and is formed by continuously arranging 2 fin tube heat exchangers 40 perpendicular to the fin section and in V shape;
the V-shaped fin tube heat exchanger 40 has a top angle α of 15 ° to 110 °.
As an alternative embodiment, the V-fin tube heat exchanger has a top angle α of 30 ° to 90 °.
As an alternative embodiment, the V-fin tube heat exchanger has a top angle α of 30 ° to 60 °.
The fin tube heat exchangers 37 are provided with heat exchange tube groups 116 arranged side by side in parallel, and are connected to different air conditioning compressors, respectively.
In this embodiment, the horizontal V-type fin tube heat exchanger 40 is used as a basic unit of an air conditioner main unit fin tube heat exchanger assembly, and 2 fin tube heat exchangers 37 of embodiment 1 forming the horizontal V-type fin tube heat exchanger 40 include 6 heat exchange tube groups 116 (i.e., refrigerant branches), the 6 heat exchange tube groups (i.e., refrigerant branches) share 1 set of fin groups, and the 1 set of fin groups include a plurality of fins parallel to each other; the 6 refrigerant branches belong to 2 independent refrigeration air conditioning systems (namely 2 sets of air conditioning compressors and the like).
When the finned tube heat exchanger assembly is operated, the microscopic process that the inlet air flow enters a plurality of fin gaps under the gradient planing of a plurality of fin planing tools and flows at low speed in the fin gaps is the central link of the finned tube heat exchanger assembly in and out of an air field.
As shown in fig. 6, one side of the section of the fin-tube heat exchanger assembly 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 assembly;
the incident section of the air inlet flow is each flat plate type finned tube heat exchanger in the finned tube heat exchanger assembly, and the intersection angle between the air inlet flow line and the tip of each finned plate on each finned tube heat exchanger is an obtuse angle; the obtuse angle beta is 97.5-145 degrees;
the air inlet flow hits the tip of each fin plate in the fin tube heat exchanger assembly 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 assembly;
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 flat plate type fin tube heat exchanger in the fin tube heat exchanger assembly on the air inlet section;
delta = d sin alpha/2 (alpha is the apex angle alpha of a V-type finned tube heat exchanger)
The vertical distance delta value of the fin tips of the front fin plate and the rear fin plate of the flat plate type fin tube heat exchanger on the air inlet section is between 0.13d (the vertex angle alpha of the V-shaped fin tube heat exchanger 40 is 15 degrees, the incidence obtuse angle beta is 97.5 degrees) and 0.7d (the vertex angle alpha of the V-shaped fin tube heat exchanger 40 is 90 degrees and the incidence obtuse angle beta is 135 degrees); preferably, the fin gap air flow velocity is 1/3 of the air intake velocity, corresponding to an incidence obtuse angle β of 109.5 ° at 39 ° for the V-shaped fin tube heat exchanger 40.
As shown in FIG. 6, at the section of the air inlet E-E, medium-speed air flow of about 4m/s flowing in from the outer elevation of the equipment platform is pushed to the section F-F of the fin gap 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 plane cutter to 'plane' a piece of air flow from the air inlet main body air flow and is 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.
The air inlet surface of the fin tube heat exchanger assembly is unfolded to obtain a large-area heat exchanger ventilation surface, and the large-area fin heat exchanger assembly ventilation surface is unfolded again to obtain a large-area fin heat transfer surface, so that the total fin heat exchange area S of the air conditioner main unit fin tube heat exchanger assembly is effectively enlarged, the heat transfer temperature difference delta t of the heat exchanger body is reduced, the evaporation pressure is increased, and the condensation pressure is reduced.
The fin tube heat exchanger assembly of the embodiment is internally provided with a plurality of fin tube heat exchangers 37, one by one and one by three, and a plurality of low-power unit hosts are arranged in one host shell, so that the rated capacity of each unit host is reduced, the wide variation and the partition variation of the heat load of a building are more efficiently met through the combination of a plurality of low-power air conditioning unit hosts, and the elasticity of an air conditioning system is increased.
Example 3
The heavy-load air conditioner host machine of the embodiment innovates the design of the air conditioner host machine from the aspects of expanding the total area of ventilation cross sections and the total area of fins of the outer heat exchanger of the air conditioner host machine, reducing the heat transfer temperature difference of the outer heat exchanger body, reducing the rated load capacity of a single air conditioner host machine and improving the load elasticity of the air conditioner host machine.
As shown in fig. 7 to 9, an air conditioning main unit with a vertically arranged fan includes a housing, the finned tube heat exchanger assembly of embodiment 2, an air conditioning compressor i 121, an air conditioning compressor ii 122, a gas-liquid separator i 126, a gas-liquid separator ii, and a fan 38.
A water collecting tank 123 is provided at the bottom of the fin tube heat exchanger.
The finned tube heat exchanger assembly is arranged on the air inlet surface of the air inlet 125 of the shell, and forms a heat exchanger assembly negative pressure cavity 124 communicated with the heat exchange air path of the finned tube heat exchanger assembly together with the side plate, the top plate, the bottom plate and the back plate of the shell;
Fluorine circuit components such as air conditioner compressor I121, air conditioner compressor II 122, gas-liquid separator I, gas-liquid separator II set up the ventilation blind area in heat exchanger assembly negative pressure chamber 124. Specifically, the ventilation blind area is arranged on the bottom plate of the negative pressure cavity 124 of the heat exchanger assembly and is positioned at the back plate.
The finned tube heat exchanger assembly is an air inlet of a negative pressure cavity 124 of the heat exchanger assembly; the exhaust outlet 331 of the exhaust chamber 33 is disposed on the same side as the air inlet 125 in the housing.
The exhaust chamber 33 is disposed above the ceiling of the heat exchanger assembly negative pressure chamber 124.
The air outlet 331 of the air discharge chamber 33 faces the short side of the air conditioner main body case.
The negative pressure cavity air outlet is provided with 1 axial flow fan 38.
And the fluorine path of the air conditioner host is connected with a plurality of indoor heat exchangers.
The air conditioning main unit of the present embodiment is connected to the indoor heat exchanger 127 to constitute an air conditioning system.
The air conditioner main unit of the embodiment innovates the design of the air conditioner main unit from the aspects of expanding the total area of ventilation sections and the total area of fins of the outer heat exchanger of the air conditioner main unit, reducing the heat transfer temperature difference of the outer heat exchanger body, reducing the rated load capacity of a single air conditioner main unit and improving the load elasticity of the air conditioner:
(1) innovative host structure design
In the embodiment, a finned tube heat exchanger assembly is constructed in the air conditioner host along the direction parallel to the air inlet surface of the air inlet, and is arranged close to the air outlet of the air inlet of the air conditioner host, so that the main section of the air exhaust channel of the air inlet channel of the finned tube heat exchanger assembly is brought into the air conditioner host;
In the embodiment, the horizontal V-shaped finned tube heat exchanger is used as a basic unit of an air conditioner host finned tube heat exchanger assembly, two flat plate type finned tube heat exchangers forming the horizontal V-shaped finned tube heat exchanger comprise a plurality of refrigerant branches, the plurality of refrigerant branches share a set of fin groups, and the set of fin groups comprise a plurality of fins which are parallel to each other; the plurality of refrigerant branches belong to a plurality of independent refrigeration air conditioning systems.
In the embodiment, at least 1 heat exchanger assembly negative pressure cavity is arranged, and the heat exchanger assembly negative pressure cavity 124 is formed by combining a bottom plate, a side plate, a back plate, a fin tube external heat exchanger and a top plate; the top plate is provided with an air outlet of the negative pressure cavity 124 of the heat exchanger assembly, and the air outlet is provided with a fan; the horizontal V-shaped fin tube heat exchangers arranged transversely and continuously are air inlets of the negative pressure cavity 124 of the heat exchanger assembly.
An exhaust cavity is arranged above the top plate of the negative pressure cavity 124 of the heat exchanger assembly, and an air inlet of the exhaust cavity is an air outlet of the negative pressure cavity 124 of the heat exchanger assembly, namely a fan; an air outlet of the air exhaust cavity is arranged on the same side as an air inlet of the air conditioner main machine, and the air inlet of the air exhaust cavity is communicated with an air outlet of a negative pressure cavity fan of the continuously arranged horizontal V-shaped heat exchanger assembly;
the back plate and the bottom plate of the negative pressure cavity 124 of the heat exchanger assembly are ventilation dead zones, and fluorine circuit components such as an air conditioner compressor, a four-way valve, an expansion valve, an electric box and the like are arranged.
(2) Innovative design of air conditioner main unit external heat exchanger air inlet and outlet field
In the embodiment, an air conditioner main unit finned tube heat exchanger assembly inlet and outlet wind field is established through fan operation: the air in the negative pressure cavity of the fan heat pumping and exchanging assembly generates negative pressure in the cavity, ambient air is pulled to enter the air conditioning main machine from the air inlet of the air conditioning main machine at medium speed, redispersed and decelerated, flows through the fin gaps of the heat exchanger at low speed to complete heat exchange, then enters the negative pressure cavity, then flows into the fan air suction inlet with the lowest pressure in a converging and accelerating way, and finally is boosted by the fan to pass through the air exhaust cavity to be discharged outwards at high speed.
When the air conditioner main unit of the embodiment operates, the microscopic process that the air inlet air flow enters a plurality of fin gaps under the gradient planing of the plurality of fin planing cutters of the fin tube heat exchanger assembly and flows at a low speed in the fin gaps is the central link of the fin tube heat exchanger assembly in and out of the wind field.
(3) Design innovation of refrigeration circuit
In the air conditioner main unit of the embodiment, circuit components such as a compressor, a four-way valve, an expansion valve, a gas-liquid separator and the like, and a power cable signal wire electric box and the like are arranged in a ventilation blind area of a negative pressure cavity of a heat exchanger assembly. The components of the refrigeration loop, the external 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.
When the air conditioner host machine of the embodiment operates, a plurality of refrigeration systems of which the refrigeration pipelines are distributed on each flat plate type finned tube heat exchanger can operate simultaneously or independently. When the air conditioner is operated, air flow outside the air conditioner main unit enters the main unit at a medium speed of about 4m/S, the air flow is decelerated and dispersed under the action of 'multi-fin planing tool echelon planing' of the V-shaped finned tubes inside the air conditioner main unit, the air flow passes through a plurality of V-shaped finned tubes with a large total ventilation section and a huge total fin heat exchange area S at a low speed of less than 1.6m/S to continuously arrange an outer heat exchanger for heat exchange, the air flow flows into a negative pressure cavity after heat exchange, is converged to a fan air suction port under the negative pressure traction of a fan of the outer heat exchanger, and is finally discharged from an air exhaust cavity at a high speed of about 8m/S after being accelerated and boosted by the fan.
Example 4
As shown in fig. 10, an air conditioning main unit with a vertically arranged fan includes a housing, the finned tube heat exchanger assembly of embodiment 2, an air conditioning compressor i 121, an air conditioning compressor ii 122, a gas-liquid separator i 126, a gas-liquid separator ii, and a fan 38.
Inside the housing is provided an elevating bracket (not shown) for mounting the fin tube heat exchanger. The fin tube heat exchanger assembly is arranged on the heightening bracket.
The finned tube heat exchanger assembly is arranged on an air inlet surface 125 of the air inlet of the shell, and forms a heat exchanger assembly negative pressure cavity 124 communicated with a heat exchange air path of the finned tube heat exchanger assembly together with a negative pressure cavity top plate, a negative pressure cavity bottom plate and a negative pressure cavity back plate.
A negative pressure cavity air outlet is arranged on the back plate of the negative pressure cavity 124 of the heat exchanger assembly, and a fan 38 and an exhaust cavity 38 are arranged at the negative pressure cavity air outlet.
The fan 38 is opposite to the finned tube heat exchanger assembly, so that the uniform heat exchange of each finned tube heat exchanger is effectively realized, and the maximum heat exchange efficiency is realized.
The exhaust cavity 33 is arranged in the space expanded by the heightening bracket at the lower part of the finned tube heat exchanger assembly in the shell, namely the exhaust cavity 33 is arranged below the bottom plate of the negative pressure cavity 124 of the heat exchanger assembly.
The air outlet 331 of the air discharge chamber 33 faces the short side of the air conditioner main body case.
The finned tube heat exchanger assembly is an air inlet of a negative pressure cavity 124 of the heat exchanger assembly; the exhaust outlet 331 of the exhaust chamber 33 is disposed on the same side as the air inlet 125 in the housing.
The back plate rear side of the discharge chamber 33 is provided with a compressor chamber 332 for mounting a fluorine circuit assembly including an air conditioner compressor, a four-way valve, an expansion valve, and an electric box.
2 backward inclined outer rotor centrifugal fans are arranged at the air outlet of the negative pressure cavity; the fans 38 are disposed in different vertical planes.
The embodiment is similar to embodiment 3, the main section of the air inlet channel and the air outlet channel of the finned tube heat exchanger assembly is taken into the air conditioner host, the horizontal V-shaped finned tube heat exchanger is used as a basic unit of the air conditioner host finned tube heat exchanger assembly, in a limited space of the air conditioner host, the horizontal V-shaped finned tube heat exchanger (S) are (continuously) arranged in parallel to the air inlet surface direction of the air conditioner host air inlet, the air inlet surface of the horizontal V-shaped finned tube heat exchanger (S) is (are) adhered to the air inlet surface of the horizontal V-shaped finned tube heat exchanger to be unfolded to obtain a large-area heat exchanger assembly ventilation surface, and the large-area finned heat transfer surface is obtained by secondary unfolding on the large-area finned tube heat exchanger assembly ventilation surface, so that the total heat exchange area S of fins of the air conditioner host finned tube heat exchanger assembly is effectively enlarged, the heat transfer temperature difference delta t of the heat exchanger body is reduced, the evaporation pressure is improved, and the condensation pressure is reduced.
The embodiment is further innovated, the wind path power adopts a backward inclined outer rotor centrifugal fan, and the exhaust cavity adopts a mode of lower air outlet and bottom exhaust.
When the air conditioner main unit operates, the centrifugal fan of the negative pressure cavity of the finned tube heat exchanger assembly operates to pump and exhaust air in the negative pressure cavity of the V-shaped outer heat exchanger, which is arranged in the negative pressure cavity of the V-shaped outer heat exchanger, and negative pressure is generated in the cavity, so that the air outside the outer heat exchanger is pulled to enter the main unit at medium speed; after the outside air enters the main machine, the outside air is planed in a ladder way by a fin planing tool and then is dispersed and decelerated, and flows through the continuously arranged V-shaped outer heat exchangers with large total ventilation section and huge total fin area, and flows through fin gaps of the V-shaped outer heat exchangers at a low speed, so that heat exchange between the ambient air and the refrigerant in copper tubes of the outer heat exchangers is realized; air entering the negative pressure cavity after heat exchange is collected and accelerated to flow into a fan air suction port with the lowest pressure, and is boosted by the centrifugal fan and passes through the air exhaust cavity to be discharged outwards at a high speed.
The embodiment also has all the advantages of the embodiment 1, and the fin heat exchange area of the refrigeration system heat exchanger in the stop operation state can be evaluated through the fin transverse heat bridge effect, so that the fin heat exchange area of the operation system heat exchanger is amplified, and the evaporation pressure improvement, the condensation pressure reduction, the compressor exhaust temperature reduction, the refrigeration and heating power increase and the energy efficiency ratio improvement are realized.
Because the embodiment exhaust cavity is arranged below the negative pressure cavity bottom plate of the heat exchanger assembly, and is close to the design of the low-position exhaust cavity on the ground of the equipment platform, the low-position exhaust cavity can be matched with the inclined louver structure of the decorative louver conventionally used on the outer vertical surface of the building, the effect that the exhaust air flow of the air conditioner main unit is led to be diffused towards the environment atmosphere by the inclined louver of the outer vertical surface in a small angle diving way is realized, the short circuit phenomenon of the exhaust air of the outer heat exchanger and the exhaust air of the air conditioner main unit, which is inherent to the outer heat exchanger, is thoroughly blocked, the function and the decoration of the outer vertical surface of the louver type building for preventing wind and rain from invading the equipment platform are maintained, and the range and the diffusion dilution effect of the exhaust air of the outer heat exchanger of the air conditioner main unit penetrating the outer vertical surface of the equipment platform into the environment atmosphere are effectively improved.
Example 5
The two-in-one finned tube heat exchanger assembly of the air conditioner host and the air energy water heater host adopts a finned tube heat exchanger, as shown in figure 11,
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; heat exchange tubes 115 are inserted in a direction perpendicular to the plane of the fin plate 110;
along the short side direction of the fin plate 110, 3 heat exchange tube groups 116 penetrating the fin plate are arranged side by side in parallel, wherein 1 heat exchange tube group is an air energy water heater heat exchange tube group 128.
The heat exchange tubes 115 in the heat exchange tube group 116 are arranged in the longitudinal direction of the fin plate 110;
the fin plate 110 includes 4 groups of heat exchange tube groups I117 and II 118 and IV 120 for the air conditioning system. The air energy water heater heat exchange tube banks 128 are located between adjacent heat exchange tube banks for the air conditioning system, with the fins between each heat exchange tube bank forming heat bridges in the transverse and longitudinal directions.
The two ends of the heat exchange tube group I117 and the heat exchange tube group II 118 are respectively connected with a fluorine liquid tube 112 and a fluorine gas tube 113 of the air-conditioning compressor I121.
The air energy water heater heat exchange tube group 128 is respectively connected with a fluorine line liquid tube and a fluorine line gas tube of the water heater compressor III 129.
The heat exchange tube groups 116 of the same row are connected in parallel to the fluorine line pipe of the same air conditioner compressor.
The heat exchange tube group I117 and the heat exchange tube group III 119 which are arranged in the same row are connected with a fluorine liquid tube 112 and a fluorine gas tube 113 of the air conditioner compressor I;
the heat exchange tube group II 118 and the heat exchange tube group IV 120 which are arranged in the same row are connected with a fluorine liquid tube 112 and a fluorine gas tube 113 of the air-conditioning compressor I.
A finned tube heat exchanger assembly is composed of 4 finned tube heat exchangers 37 of the embodiment.
The section of the fin tube heat exchanger assembly perpendicular to the fins 110 is a broken line type; the fin long sides of the fin tube heat exchanger 37 are arranged in the vertical direction or close to the vertical direction;
in the embodiment, the section of the fin tube heat exchanger assembly perpendicular to the fins 110 is W-shaped, and the fin tube heat exchanger assembly is formed by continuously arranging 2 fin tube heat exchangers 40 perpendicular to the fin section and in a V shape;
the vertex angle alpha of the V-shaped fin tube heat exchanger is 15-90 degrees.
The integral structure of the air conditioner main unit and air energy water heater main unit two-in-one finned tube heat exchanger assembly is formed by combining 2 horizontal V-shaped finned tube heat exchangers, each V-shaped heat exchanger is formed by combining 2 flat plate type finned tube heat exchangers, each 1 flat plate type finned tube heat exchanger further comprises 3 rows of heat exchange tube groups, wherein 2 rows of heat exchange tube groups on the inner side and the outer side belong to an air conditioner main unit outer heat exchanger, the middle 1 row of heat exchange tube groups belong to an air energy water heater main unit outer heat exchanger, fins are complete and continuous, and the fin transverse and longitudinal heat bridge functions are complete and continuous.
Example 6
The embodiment adopts a combination system of an air conditioner host and an air energy water heater host, wherein the combination system adopts a transverse fin heat bridge to implement heat exchanger structure complementary air path combination, the combination structure and the energy coupling design method are used for implementing centralized arrangement of an air conditioner host external heat exchanger and a water heater evaporator air path structure, and the combination is formed into a 'structure complementary' and 'air path combination' two-in-one fin tube heat exchanger assembly which has the heat exchange of the air conditioner host to the environment atmosphere and the heat absorption of the air energy water heater host to the environment atmosphere.
An air energy water heater comprises an air conditioner main unit, an indoor heat exchanger 127, a water heater tank 130 and a water heater condenser 131 arranged in the water heater tank 130.
As shown in fig. 12, the air conditioning main unit includes a housing, the finned tube heat exchanger assembly of embodiment 5, an air conditioning compressor i 121, an air conditioning compressor iii 129, a gas-liquid separator i, a gas-liquid separator iii, and a fan 38.
The fluorine paths of the air conditioner compressor i 121 are connected to the plurality of indoor heat exchangers 127, respectively.
The fluorine path of the air conditioner compressor III 129 is connected with a water heater condenser, a gas-liquid separator III and the like.
An elevating bracket (not shown) for mounting the fin tube heat exchanger is provided at the inner bottom of the housing. The fin tube heat exchanger assembly is arranged on the heightening bracket.
The finned tube heat exchanger assembly is arranged on an air inlet surface 125 of the air inlet of the shell, and forms a heat exchanger assembly negative pressure cavity 124 communicated with a heat exchange air path of the finned tube heat exchanger assembly together with a negative pressure cavity top plate, a negative pressure cavity bottom plate and a negative pressure cavity back plate.
A negative pressure cavity air outlet is arranged on the back plate of the negative pressure cavity 124 of the heat exchanger assembly, and a fan 38 and an exhaust cavity 38 are arranged at the negative pressure cavity air outlet.
The fan 38 of the air outlet 331 of the negative pressure cavity faces the finned tube heat exchanger assembly, so that the heat exchange uniformity of each finned tube heat exchanger is effectively realized, and the maximum heat exchange efficiency is realized.
The exhaust cavity 33 is arranged in the space expanded by the heightening bracket at the lower part of the finned tube heat exchanger assembly in the shell, namely the exhaust cavity 33 is arranged below the bottom plate of the negative pressure cavity 124 of the heat exchanger assembly.
The air outlet 331 of the air discharge chamber 33 faces the short side of the air conditioner main body case.
The finned tube heat exchanger assembly is an air inlet of a negative pressure cavity 124 of the heat exchanger assembly; the exhaust outlet 331 of the exhaust chamber 33 is disposed on the same side as the air inlet 125 in the housing.
The back plate rear side of the discharge chamber 33 is provided with a compressor chamber 332 for mounting a fluorine circuit assembly including an air conditioner compressor, a four-way valve, an expansion valve, and an electric box.
2 backward inclined outer rotor centrifugal fans are arranged at the air outlet of the negative pressure cavity; the fans 38 are disposed in different vertical planes.
According to the air-conditioning host air energy water heater host combined system with the external heat exchanger structure complementary air passage combination, the inner heat exchange tube fins and the outer heat exchange tube fins of the finned tube heat exchanger are transversely and longitudinally continuous, the air energy water heater host evaporator and the air-conditioning host finned tube heat exchanger establish heat conduction connection through the fin transverse heat bridge, and the effective utilization of the heat exchange area of the heat exchange fins of the air-conditioning host heat exchanger which is stopped by the running air-conditioning host heat exchanger is achieved, so that the heat transfer temperature difference of the external heat exchanger of the running host is reduced, and the energy efficiency ratio of the host system is improved.
In this embodiment, the air conditioning main unit and the air energy water heater main unit may operate simultaneously or may operate separately.
When the air conditioner main unit operates, the air conditioner main unit compressor in the negative pressure cavity of the finned tube heat exchanger assembly drives the flow of the refrigerant in the air conditioner fluorine path and the phase change heat absorption and release; the fan pushes air flow to pass through the gaps of the V-shaped heat exchanger fins of the air conditioner host machine to implement heat exchange between ambient air and the refrigerant in the pipeline of the outer heat exchanger: the fan discharges air flow to the environment atmosphere upwards, and negative pressure is generated in the negative pressure cavity in front of the air suction port of the fan; the negative pressure pulls the ambient air to flow through the gaps of the heat conducting metal fins of the heat exchanger of the air conditioner host, and heat exchange is carried out between the fins on two sides of the gaps and the metal pipe wall covered by the fins in a compacting manner and the refrigerant in the pipe. In summer, ambient air passes through the fins to raise the temperature, absorb heat and take away heat so as to ensure that high-temperature high-pressure refrigerant gas in the metal tube continuously carries out exothermic condensation, and in winter, ambient air passes through the fins to lower the temperature, release heat and leave heat so as to ensure that low-pressure refrigerant liquid in the metal tube continuously carries out endothermic evaporation; air flowing into the negative pressure cavity after heat exchange is boosted by the fan and is injected upwards into the ambient atmosphere for diffusion dilution.
When the air energy water heater host machine operates, the air energy water heater host machine compressor in the negative pressure cavity drives the flow and phase change heat absorption of the refrigerant in the fluorine path of the air energy water heater; the fan is coupled with the phase change heat exchange of the refrigerant in the fluorine path, a negative pressure state is caused in the negative pressure cavity, ambient air is pulled to flow through gaps of the evaporator fins to reduce the temperature, water vapor is filtered out, heat is released, continuous heat supply is used for guaranteeing continuous evaporation of low-pressure refrigerant liquid in the evaporator pipeline and continuous condensation and heat release of high-temperature high-pressure refrigerant gas in the condenser in the water tank after the pressure is increased by the compressor; air entering the negative pressure cavity after heat is released from the evaporator fins of the main machine of the air energy water heater is sucked by a fan behind the negative pressure cavity, and is boosted and injected upwards into the ambient atmosphere for diffusion dilution.
The heat exchanger structure complementary air path combined air conditioner host and air energy water heater host combined system has the advantages that:
(1) simple structure and smooth air path
The air energy water heater with the air conditioner host has the advantages that the air energy water heater with the air conditioner host is integrated into a whole, the structure is simple, the air path is smooth, the density of the air outlet on the outer vertical surface of the equipment platform is reduced, the risk of air exhaust backflow is reduced, and the performance of the heat exchanger is improved.
According to the embodiment, aiming at redundancy of the air conditioner main machine outer heat exchanger fan under low load, on the basis of complementation of the air conditioner main machine outer heat exchanger and the air energy water heater evaporator structure and combination of air paths, the redundancy of the household air conditioner main machine outer heat exchanger variable frequency fan is developed, the redundancy of the air conditioner main machine variable frequency fan is converted into air energy water heater main machine evaporator air path power to replace a special fan of the water heater evaporator, air energy water heater main machine air duct and fan component resources are saved, and comprehensive energy efficiency of an air conditioner water heater two-in-one combined system is improved.
According to the finned tube heat exchanger assembly of the air conditioner host and the air energy water heater host, fresh air flow is introduced from the outer vertical face of the equipment platform, the fresh air flow flows into the outer heat exchanger at a medium speed, is planed by the fin planing knife to enter a fin gap at a low speed to finish heat exchange, then is sucked by the fan, is accelerated to boost, is discharged into the environment in a high-speed jet mode to diffuse and dilute, and the air path of the outer heat exchanger is smooth.
(2) Improving COP of two sets of refrigerating (heat pump) systems of air conditioner and water heater
The air energy water heater host of the air conditioner host machine of the embodiment is integrated into a whole, has a simple structure and smooth air path, reduces the risk of exhaust and backflow of the outer facade, improves the refrigerating and heating performance of the host machine, and also improves the utilization coefficient of the whole two-in-one finned tube heat exchanger by taking the heat exchange function of the external heat exchanger fin of the operation host machine to the ambient air through the transverse fin heat bridge effect when the air conditioner host machine and the air energy water heater host machine are independently operated, thereby realizing the expansion of the heat exchange fin area of the external heat exchanger of the operation host machine and the reduction of the heat exchange temperature difference.
When the air conditioner host machine is used for refrigerating and the air energy water heater is used for heating and synchronously running, the evaporator of the water heater host machine can also absorb high-temperature heat release of the condenser of the air conditioner host machine through the fin heat bridge effect so as to obtain ultrahigh evaporation pressure and ultrahigh energy efficiency of the heat pump of the water heater;
the embodiment is beneficial to saving resources, improving the utilization coefficient of the finned tube heat exchanger, improving the evaporation pressure during air conditioning heat and hot water production and reducing the condensation pressure during air conditioning refrigeration, thereby improving the COP of two systems of the air conditioner and the water heater.
Example 7
The utility model provides a corridor formula equipment room platform sets for the direction of perpendicular to corridor formula equipment platform outer facade as vertically, and the direction of being parallel to corridor formula equipment platform outer facade is horizontal.
13-15, an air conditioner host equipment platform is provided, in which a plurality of groups of air conditioner hosts of embodiments 3/4 or 6 are arranged in the transverse direction; the equipment platform is provided with an outer vertical face 1 for ventilation, and an air inlet 125 of an air conditioner main unit finned tube heat exchanger assembly of the air conditioner main unit system is close to the outer vertical face 1; the exhaust opening 331 of the exhaust chamber 33 is arranged and/or adjacent to the facade 1.
The outer elevation 1 is provided with a wind discharging area 132 and a wind 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 1 are continuously arranged on the upper part of the facade, the air inlet areas 125 on the facade are continuously arranged on the middle part or the middle lower part of the facade, and the boundary between the exhaust areas of the facade and the air inlet areas of the facade is a horizontal straight line or the boundary is close to the horizontal straight line.
The area of the exhaust area on the outer vertical surface 1 is 25% -50% of the area of the outer vertical surface for ventilation. The facade for ventilation refers to a facade with air flow in and out.
And a three-in-one channel for pedestrians, 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 2 of the equipment platform. The embodiment develops and utilizes the top idle space of the equipment platform, an exhaust cavity is arranged in the top space, an exhaust outlet of the exhaust cavity is arranged on the same side as an air inlet of the air inlet channel, the exhaust outlet is arranged up and down, and the area of the exhaust outlet is obviously smaller than that of the air inlet;
the air inlet and outlet of the air conditioner host machine is directly connected with the air inlet and outlet on the outer vertical surface of the equipment platform, so that the air inlet and outlet field of the air conditioner host machine outer heat exchanger with the shortest air inlet and outlet path and the highest air pressure field gradient is constructed, and conditions are created for eliminating the longitudinal transverse air supply air duct and the pressure reduction and efficiency invalidation space of the rear air conditioner host machine on the traditional air conditioner host machine 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 embodiment has compact structure, and the air inlet of the air outlet of the air conditioner host is arranged in the same direction, on the same side and up and down, so that conditions are prepared for installing the air conditioner host side air outlet structure on the equipment platform and constructing the air conditioner host side air outlet structure by matching with the outer elevation of the equipment platform; under the design concept that the area of an air inlet and the area of an air outlet of the air conditioner main unit are approximately equal to 2:1, the air exhaust speed of the finned tube heat exchanger assembly reaches 2 times of the air inlet speed, and the air exhaust dynamic pressure head reaches 4 times of the air inlet dynamic pressure head, so that 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 of air conditioner main unit air exhaust jet penetrating through the external vertical surface of the equipment platform and entering the environment atmosphere are effectively improved.
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 utility model, through the inner and outer heat exchangers of the recombination air conditioner host and the air inlet and outlet paths of the outer heat exchangers, the power density of the air conditioner host is improved, and the recombination air conditioner host and the equipment platform are in structural relation, so that the inefficient dead space is greatly reduced, the occupied area of the equipment platform is greatly reduced under the same building heat load condition, the lateral width of the outer vertical surface of the building equipment occupied by the air inlet and outlet surfaces of the air conditioner host is greatly reduced, and ventilation lighting and visual communication between the inner space of the same-layer building and the external environment are ensured.
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 (10)
1. A finned tube heat exchanger, characterized in that the finned tube heat exchanger comprises a fin plate and a heat exchange tube; a plurality of fin plates which are parallel to each other and are separated by a certain interval form a fin group;
Heat exchange tubes are arranged in a penetrating manner along the direction perpendicular to the fin plates; at least 2 heat exchange tube groups penetrating through the fin plates are arranged in parallel along the short side direction of the fin plates; the heat exchange tubes in the heat exchange tube group are arranged along the long side direction of the fin plate; the heat exchange tube groups are arranged side by side and in parallel and are connected to compressors of different refrigeration systems;
the fins between the heat exchange tube groups form fin heat bridges in the transverse and vertical directions.
2. The fin tube heat exchanger of claim 1, wherein the heat exchange tube groups of the same row are connected in parallel to fluorine circuit piping of the same refrigeration system.
3. A finned tube heat exchanger, characterized in that the finned tube heat exchanger comprises a fin plate and a heat exchange tube; a plurality of fin plates which are parallel to each other and are separated by a certain interval form a fin group;
heat exchange tubes are arranged in a penetrating manner along the direction perpendicular to the fin plates; at least 2 heat exchange tube groups penetrating through the fin plates are arranged in parallel along the short side direction of the fin plates; wherein at least 1 group of heat exchange tube groups are air energy water heater heat exchange tube groups;
the heat exchange tubes in the heat exchange tube group are arranged along the long side direction of the fin plate.
4. The fin tube heat exchanger according to claim 3, wherein,
the fin plate comprises at least 2 heat exchange tube groups for the air conditioning system, and the air energy water heater heat exchange tube groups are positioned between adjacent heat exchange tube groups for the air conditioning system.
5. A multi-system heavy-load air conditioner host, which is characterized by comprising a shell, the finned tube heat exchanger of any one of claims 1-4, a fan and at least 2 groups of compressor modules consisting of an air conditioner compressor and a gas-liquid separator;
at least 2 groups of gas-liquid separators, air conditioner compressors, four-way valves, heat exchanger assemblies, expansion valves and refrigerant pipelines of the air conditioner indoor units are sequentially communicated to construct at least 2 groups of refrigerant circulation loops of the refrigeration air conditioner systems, so that at least 2 independent operation air conditioner unit hosts are formed;
a fin tube heat exchanger assembly is formed by at least 2 flat plate type fin tube heat exchangers; or a V-shaped finned tube heat exchanger formed by bending a flat plate type finned tube heat exchanger, namely a finned tube heat exchanger assembly; or a fin tube heat exchanger assembly is formed by a flat plate type fin tube heat exchanger and the V-shaped fin tube heat exchanger formed by bending the flat plate type fin tube heat exchanger;
the section of the fin tube heat exchanger assembly perpendicular to the long sides of the fins is a folded line type; the fin long sides of the fin tube heat exchanger are arranged in the vertical direction or close to the vertical direction;
the finned tube heat exchanger assembly is arranged on the air inlet surface of the air inlet of the shell, and forms a heat exchanger assembly negative pressure cavity communicated with a heat exchange air path of the finned tube heat exchanger assembly with at least part of the shell;
A negative pressure cavity air outlet is arranged on a top plate or a back plate of the negative pressure cavity of the heat exchanger assembly, and a fan and an exhaust cavity are arranged at the negative pressure cavity air outlet.
6. The multi-system heavy duty air conditioning host of claim 5 wherein the fin tube heat exchanger assembly is V-shaped, N-shaped in cross section perpendicular to the long sides of the fins, or is comprised of a continuous arrangement of at least 2V-shaped fin tube heat exchangers in cross section perpendicular to the long sides of the fins.
7. The multi-system heavy duty air conditioner main unit of claim 5, wherein the finned tube heat exchanger assembly is a heat exchanger assembly negative pressure cavity air inlet; the exhaust outlet of the exhaust cavity is arranged on the same side with the air inlet in the shell.
8. The multi-system heavy-duty air conditioner main unit according to claim 5, wherein the air exhaust cavity is a cavity with a one-way air outlet, and comprises a vertical air exhaust cavity and a horizontal air exhaust cavity which are communicated with each other; the air outlet of the air exhaust cavity is arranged on the transverse air exhaust cavity and is far away from the vertical air exhaust cavity; the transverse exhaust cavity is arranged below the bottom plate of the negative pressure cavity of the heat exchanger assembly or above the top plate of the negative pressure cavity of the heat exchanger assembly.
9. The multi-system heavy duty air conditioning host of claim 5 wherein each air conditioning unit host independently controls operating conditions;
The air energy water heater heat exchange tube group is connected with a unit host of the air energy water heater; the rest heat exchange tube groups are connected with an air conditioning unit host of the air conditioning system.
10. An air conditioner host machine equipment platform, which is characterized in that at least 1 group of the multi-system heavy-load air conditioner host machines according to any one of claims 5 to 9 are arranged in the equipment platform along the transverse direction; the equipment platform is provided with an outer vertical face for ventilation, and an air inlet of an air conditioner main unit finned tube heat exchanger assembly of the air conditioner main unit system is close to the outer vertical face; the air outlet of the air exhaust cavity is arranged and/or is close to the outer elevation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321206935.6U CN219756527U (en) | 2023-05-18 | 2023-05-18 | Fin tube heat exchanger and multi-system heavy-load air conditioner host and equipment platform thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321206935.6U CN219756527U (en) | 2023-05-18 | 2023-05-18 | Fin tube heat exchanger and multi-system heavy-load air conditioner host and equipment platform thereof |
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| Publication Number | Publication Date |
|---|---|
| CN219756527U true CN219756527U (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321206935.6U Active CN219756527U (en) | 2023-05-18 | 2023-05-18 | Fin tube heat exchanger and multi-system heavy-load air conditioner host and equipment platform thereof |
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| Country | Link |
|---|---|
| CN (1) | CN219756527U (en) |
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2023
- 2023-05-18 CN CN202321206935.6U patent/CN219756527U/en active Active
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