CN114111001B - Heat exchange device, fresh air system and heat exchange control method of fresh air system - Google Patents

Heat exchange device, fresh air system and heat exchange control method of fresh air system Download PDF

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Publication number
CN114111001B
CN114111001B CN202111397606.XA CN202111397606A CN114111001B CN 114111001 B CN114111001 B CN 114111001B CN 202111397606 A CN202111397606 A CN 202111397606A CN 114111001 B CN114111001 B CN 114111001B
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heat exchange
core
air
total heat
cores
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CN114111001A (en
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胡东杰
袁琪
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a heat exchange device, a fresh air system and a heat exchange control method thereof, wherein the device comprises: a tuyere, comprising: an air inlet and an air outlet; the number of the air inlets is more than one, and the number of the air outlets is more than one; a damper assembly comprising: an air valve; the number of the blast gates is N; n blast valves, enclose and form the heat exchange space; any air inlet of the more than one air inlets can form an air channel with at least one air outlet of the more than one air outlets only through the heat exchange space; a core assembly, comprising: more than two total heat exchange cores; more than two total heat exchange cores distributed in the heat exchange space; the positions and the number of the total heat exchange cores participating in heat exchange in the more than two total heat exchange cores can be controlled by controlling the opening and closing of the air valves at the peripheries of the more than two total heat exchange cores and the air channels in the air valve assembly. This scheme, through the heat transfer area according to actual amount of wind demand adjustment core, can reduce the windage, promote heat exchange efficiency.

Description

Heat exchange device, fresh air system and heat exchange control method of fresh air system
Technical Field
The invention belongs to the technical field of heat exchange, and particularly relates to a heat exchange device, a fresh air system and a heat exchange control method thereof, in particular to a controllable total heat exchange assembly, a fresh air system with the total heat exchange assembly and a control method of the total heat exchange assembly.
Background
The requirements of people on indoor air quality and health comfort are increasingly improved, and the energy consumption of fresh air brought by the indoor air quality and health comfort is always high. By applying the air waste heat recovery technology, the contradiction between the quality guarantee of the fresh air and the increase of the energy consumption can be relieved. However, the total heat recovery core body adopted by the air waste heat recovery technology has the problems of low heat exchange efficiency, large resistance loss and the like, and the development, popularization and application of the total heat recovery core body are restricted.
In consideration, the main factors influencing the heat exchange efficiency of the total heat recovery core body are as follows: the heat exchange surface area inside the total heat recovery core, the form of the heat exchange flow channel of the total heat recovery core, the circulation time of air in the total heat exchange core and the like. In the total heat recovery core body in the related scheme, cold air and hot air are generally divided into an upper layer and a lower layer, and heat and moisture exchange is carried out through a heat exchange membrane material. The air on the two sides of the total heat recovery core body film is subjected to heat and moisture exchange, and the heat or cold in the air is effectively utilized.
However, the total heat recovery core in the related scheme is usually composed of a whole core, and the same structure is adopted for different air volume requirements, so that the wind resistance is large under the condition of small air volume; and under the condition of large air quantity, the heat exchange efficiency is insufficient.
The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.
Disclosure of Invention
The invention aims to provide a heat exchange device, a fresh air system and a heat exchange control method thereof, which are used for solving the problems that a total heat recovery core body is composed of a whole core body, the heat exchange area of the core body cannot be adjusted according to the actual air volume requirement, so that the air resistance is large under the condition of small air volume, and the heat exchange efficiency is insufficient under the condition of large air volume.
The present invention provides a heat exchange device comprising: the air valve assembly, the core body assembly, the air port and the shell are arranged on the shell; the air port is arranged on the shell; the air valve assembly and the core body assembly are arranged inside the shell; wherein, the wind gap includes: an air inlet and an air outlet; the number of the air inlets is more than one, and the number of the air outlets is more than one; the blast gate subassembly includes: an air valve; the number of the air valves is N, and N is a positive integer; the N air valves surround a heat exchange space; any one of the more than one air inlets and at least one of the more than one air outlets can form an air duct only through the heat exchange space; the core assembly, comprising: more than two total heat exchange cores; more than two total heat exchange cores distributed in the heat exchange space; the positions and the quantity of the total heat exchange cores participating in heat exchange in the total heat exchange cores can be controlled by controlling the opening and closing of the air valves at the periphery of the total heat exchange cores and the air passage in the air valve assembly, so that the heat exchange area of the total heat exchange cores can be adjusted.
In some embodiments, the damper comprises: a shutter air valve.
In some embodiments, the N air valves enclosing the heat exchange space divide the heat exchange space into two or more accommodating spaces; the number of the accommodating spaces is greater than or equal to that of the total heat exchange cores; and the full heat exchange core is accommodated in the accommodating space.
In some embodiments, the shape of the heat exchange space comprises: any one of a quadrangle, a hexagon and a rhombus; the shape of each said total heat exchange core, comprising: any one of a quadrangle, a hexagon and a rhombus; accordingly, the shape of each accommodating space comprises: any one of a quadrangle, a hexagon, and a rhombus.
In some embodiments, two or more of said total heat exchange cores comprise: the first full heat exchange core, the second full heat exchange core and the third full heat exchange core; under the condition that the heat exchange space is quadrilateral and each total heat exchange core body is quadrilateral, N air valves of the heat exchange space are enclosed to divide the heat exchange space into nine accommodating spaces; the first total heat exchange core body, the second total heat exchange core body and the third total heat exchange core body are distributed in the nine accommodating spaces at intervals.
In some embodiments, the nine accommodating spaces are arranged in a manner including a squared figure; the first full heat exchange core body is accommodated in a first accommodating space of the nine accommodating spaces; the second full heat exchange core is accommodated in a third accommodating space of the nine accommodating spaces; and the third total heat exchange core body is accommodated in a seventh accommodating space of the nine accommodating spaces.
In some embodiments, the membrane material of each of two or more total heat exchange cores comprises: paper film or polymer film.
In some embodiments, two or more total heat exchange cores each having a core support frame; the core support frame includes: any one of a blank plate frame, an injection molded part frame and a self-supporting frame.
In another aspect, the present invention provides a fresh air system, including: the heat exchange device described above.
In another aspect, the present invention provides a heat exchange control method for a fresh air system, including: under the condition that the fresh air system is started, regularly acquiring the indoor environment temperature and humidity and the outdoor environment temperature and humidity of the air port; according to the indoor environment temperature and humidity, the indoor environment enthalpy value is ensured; determining an outdoor environment enthalpy value according to the outdoor environment temperature and humidity; and controlling the opening and closing of air valves at the periphery of more than two total heat exchange cores and at an air duct in the air valve assembly according to the indoor environment enthalpy value and the outdoor environment enthalpy value so as to control the positions and the quantity of the total heat exchange cores participating in heat exchange in the more than two total heat exchange cores and realize the adjustment of the heat exchange area of the more than two total heat exchange cores.
In some embodiments, controlling the opening and closing of the dampers at the periphery of two or more total heat exchange cores and at the air duct in the damper assembly according to the indoor environment enthalpy value and the outdoor environment enthalpy value includes:
determining the difference value between the indoor environment enthalpy value and the outdoor environment enthalpy value, determining the ratio of the difference value to the indoor environment enthalpy value, and controlling the core component to work in any one of a single-core mode, a double-core mode and a multi-core mode according to the interval of the ratio in a set ratio range; the single-core mode is a mode in which one total heat exchange core of the more than two total heat exchange cores participates in heat exchange, and the rest total heat exchange cores do not participate in heat exchange; the double-core mode is a mode in which two of the total heat exchange cores participate in heat exchange, and the rest of the total heat exchange cores do not participate in heat exchange; the multi-core mode is a mode in which two or more total heat exchange cores of the two or more total heat exchange cores participate in heat exchange, and the rest total heat exchange cores do not participate in heat exchange.
In some embodiments, in a case where two or more total heat exchange cores include a first total heat exchange core, a second total heat exchange core, and a third total heat exchange core, controlling the core assembly to operate in any one of a single core mode, a double core mode, and a multi core mode according to a range of the ratio in a set ratio range includes: if the ratio is greater than or equal to 0 and less than the lower limit of the set ratio range, controlling the opening and closing of air valves at the periphery of the third total heat exchange core and the air duct, and controlling the closing of the rest air valves so as to control the core assembly to work in the single core mode; if the ratio is greater than or equal to the lower limit of the set ratio range and less than the upper limit of the set ratio range, controlling the opening and closing of air valves at the peripheries of the first total heat exchange core and the second total heat exchange core and at the air duct and controlling the closing of the rest air valves so as to control the core assembly to work in the double-core mode; if the ratio is larger than or equal to the upper limit of the set ratio range, the opening and closing of air valves at the peripheries of the first full heat exchange core, the second full heat exchange core and the third full heat exchange core and at the air duct are controlled, and the other air valves are controlled to be closed, so that the core assembly is controlled to work in a three-core mode of the multi-core modes.
Therefore, according to the scheme of the invention, the heat exchange space with more than one group of air inlets and air outlets (one group of air inlets and air outlets is composed of one air inlet and one air outlet which are arranged on one air duct) is arranged, the total heat recovery core body assembly composed of more than two core bodies is arranged in the heat exchange space, the combination mode of the more than two core bodies is adjusted according to the actual air quantity requirement, the adjustment of the heat exchange area of the core bodies in the total heat recovery core body assembly is realized, and the air resistance and the heat exchange efficiency are reasonably controlled; therefore, through the full heat recovery core body assembly formed by the two or more cores, the heat exchange area of the cores can be adjusted according to the actual air volume demand, the air resistance can be reduced under the condition of small air volume, and the heat exchange efficiency is improved under the condition of large air volume.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of a heat exchange device according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an embodiment of an intelligent tuyere;
FIG. 3 is a schematic structural diagram of an embodiment of a single core mode of an intelligent tuyere;
FIG. 4 is a schematic structural diagram of an embodiment of a dual core mode of an intelligent tuyere;
FIG. 5 is a schematic structural view of an embodiment of a three-core mode of the intelligent tuyere;
FIG. 6 is a schematic diagram of an embodiment of a combined control system for a controllable total heat exchange module;
FIG. 7 is a schematic flow chart diagram illustrating an embodiment of a control method of an intelligent tuyere core mode;
FIG. 8 is a flowchart illustrating a heat exchange control method according to an embodiment of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
1. 2, 3, 5, 6, 9, 10, 11, 12, 13, 15, 16, 17, 20, 22, 25, 26, 27, 28, 29-shutter air valve; 8. 19, 24, 30-tuyeres; 7. 18, 23, 31-temperature and humidity sensor; 4. 14, 21-total heat exchange core.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some schemes involve a total heat exchange core body, but the total heat exchange core body is not distinguished aiming at different working conditions, so that the problems of low heat exchange efficiency, large wind resistance and the like are caused.
According to an embodiment of the present invention, a heat exchange device is provided. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The heat exchange device may include: blast gate subassembly, core subassembly, wind gap and casing. The air port is arranged on the shell and used for realizing the ventilation inside and outside the shell. The air valve assembly and the core body assembly are arranged inside the shell.
Wherein, the wind gap includes: an air inlet and an air outlet. The number of the air inlets is more than one, and the number of the air outlets is more than one.
The blast gate subassembly includes: an air valve. The number of the blast gates is N, and N is a positive integer. And the N air valves surround a heat exchange space. And only through the heat exchange space, any one of the more than one air inlets and at least one of the more than one air outlets form an air duct.
The core assembly, comprising: more than two total heat exchange cores. More than two total heat exchange cores are distributed in the heat exchange space. The positions and the quantity of the total heat exchange cores participating in heat exchange in the total heat exchange cores can be controlled by controlling the opening and closing of the air valves at the periphery of the total heat exchange cores and the air passage in the air valve assembly, so that the heat exchange area of the total heat exchange cores can be adjusted.
The scheme of the invention provides a controllable combined control system of a total heat exchange assembly (namely a total heat recovery core assembly), which can adjust the combination mode of the total heat recovery core in the total heat recovery core assembly according to the actual air volume requirement, effectively reduce the resistance of a unit and further improve the energy efficiency.
Fig. 2 is a schematic structural view of an embodiment of the intelligent tuyere. As shown in fig. 2, the intelligent air outlet is an air outlet device at the end of an air duct of an air processing device (such as a fresh air fan, an air duct machine, etc.), such as an air valve core device, and is composed of an air valve assembly, a core assembly, an air outlet and a shell. The air outlet device at the tail end of the air channel is matched with built-in control logic through optimization of the structure and the function of the air outlet device, so that intelligent adjustment and control of an air port are realized.
In some embodiments, the damper comprises: a shutter air valve.
In the example shown in fig. 2, the air valve assembly is a louver air valve, such as louver air valve 1, louver air valve 2, louver air valve 3, louver air valve 5, louver air valve 6, louver air valve 9, louver air valve 10, louver air valve 11, louver air valve 12, louver air valve 13, louver air valve 15, louver air valve 16, louver air valve 17, louver air valve 20, louver air valve 22, louver air valve 24, louver air valve 25, louver air valve 26, louver air valve 27, louver air valve 28, louver air valve 29, and the like, and the occupied space of the air valve is effectively reduced.
In some embodiments, the N air valves enclosing the heat exchange space divide the heat exchange space into two or more accommodating spaces. The number of the accommodating spaces is larger than or equal to that of the total heat exchange cores.
And the full heat exchange core is accommodated in the accommodating space.
In some embodiments, the shape of the heat exchange space comprises: any one of a quadrangle, a hexagon, and a rhombus.
The shape of each said total heat exchange core, comprising: any one of a quadrangle, a hexagon, and a rhombus. Accordingly, the shape of each accommodating space comprises: any one of a quadrangle, a hexagon, and a rhombus.
The shape of the core (i.e., total heat exchange core) assembly is not limited to a core having a quadrangular shape, a hexagonal shape, a rhombic shape, or the like, as long as the total heat exchange function can be achieved.
In some embodiments, two or more of the total heat exchange cores comprise: the first total heat exchange core, the second total heat exchange core and the third total heat exchange core.
And under the condition that the heat exchange space is quadrilateral and each total heat exchange core body is also quadrilateral, the N air valves of the heat exchange space are enclosed to divide the heat exchange space into nine accommodating spaces. The first total heat exchange core body, the second total heat exchange core body and the third total heat exchange core body are distributed in the nine accommodating spaces at intervals.
In some embodiments, the nine accommodating spaces are arranged in a manner including a squared figure.
The first total heat exchange core body is accommodated in a first accommodating space of the nine accommodating spaces. And the second full heat exchange core body is accommodated in a third accommodating space of the nine accommodating spaces. And the third total heat exchange core body is accommodated in a seventh accommodating space of the nine accommodating spaces.
In the example shown in fig. 2, a total heat exchange core assembly includes: a first total heat exchange core such as the total heat exchange core 4, a second total heat exchange core such as the total heat exchange core 14, and a third total heat exchange core such as the total heat exchange core 21.
Take the case where the shape of the core (i.e., total heat exchange core) assembly is a quadrilateral. Nine core receiving spaces, such as nine core receiving spaces in a nine-grid pattern, are provided in the core support frame of the quadrilateral total heat exchange core assembly. The total heat exchange core 4 is located in the core accommodating space at the upper left corner, the total heat exchange core 14 is located in the core accommodating space at the upper right corner, and the total heat exchange core 21 is located in the core accommodating space at the lower left corner.
Take the core accommodating space as a quadrangle as an example. The louver air valve 2, the louver air valve 5, the louver air valve 6 and the louver air valve 3 can be enclosed into a quadrangular core accommodating space in the clockwise direction, and the total heat exchange core 4 is accommodated in the core accommodating space. The louver air valve 12, the louver air valve 13, the louver air valve 15 and the louver air valve 16 may form a quadrangular core accommodating space in a clockwise direction, and the total heat exchange core 14 is accommodated in the core accommodating space. The louver damper 20, the louver damper 1, the louver damper 25, and the louver damper 22 may be enclosed into a quadrangular core accommodating space in a clockwise direction, and the total heat exchange core 21 is accommodated in the core accommodating space.
Between the louver damper 5 and the louver damper 13, the louver damper 10 is provided in the horizontal direction. Between the louver damper 3 and the louver damper 15, a louver damper 11 is provided. Between the louver air valve 1 and the louver air valve 28, a louver air valve is provided. Between the louver damper 22 and the louver damper 27, a louver damper is provided.
Between the louver damper 2 and the louver damper 20, a louver damper is provided in the vertical direction. Between the louver damper 6 and the louver damper 25, a louver damper 9 is provided. Between louver damper 11 and louver damper 26, louver damper 17 is provided. Between the louver damper 16 and the louver damper 29, a louver damper is provided.
In the example shown in fig. 2, the tuyere is, for example, tuyere 8, tuyere 19, tuyere 24, tuyere 30. Wherein, the air inlet 8 is an air inlet, the air outlet 24 is an air outlet, and the air inlet 8 and the air outlet 24 are arranged on an air duct, such as a vertical air duct. The air port 19 is an air inlet, the air port 30 is an air outlet, and the air port 19 and the air port 30 are arranged on an air duct, such as a horizontal air duct.
In some embodiments, the membrane material of each of two or more total heat exchange cores comprises: paper film or polymer film.
In the material of the core member, the film material is not limited to a paper film or a polymer film.
In some embodiments, two or more total heat exchange cores each having a core support frame. The core support frame includes: any one of a blank plate frame, an injection molded part frame and a self-supporting frame.
The core support frame in the core assembly is not limited to a hollow plate frame, an injection molding frame and a self-supporting frame, and can realize a support function.
By adopting the technical scheme of the invention, the heat exchange space with more than one group of air inlets and air outlets (one group of air inlets and air outlets is composed of one air inlet and one air outlet which are arranged on one air duct) is arranged, the total heat recovery core body component composed of more than two core bodies is arranged in the heat exchange space, and the combination mode of the more than two core bodies is adjusted according to the actual air quantity requirement, so that the adjustment of the heat exchange area of the core bodies in the total heat recovery core body component is realized, and the air resistance and the heat exchange efficiency are reasonably controlled. Therefore, through the full heat recovery core body assembly formed by the two or more cores, the heat exchange area of the cores can be adjusted according to the actual air volume demand, the air resistance can be reduced under the condition of small air volume, and the heat exchange efficiency is improved under the condition of large air volume.
According to the embodiment of the invention, a fresh air system corresponding to the heat exchange device is also provided. This new trend system can include: the heat exchange device described above.
Since the processing and functions of the fresh air system of this embodiment are basically corresponding to the embodiments, principles and examples of the foregoing devices, the descriptions of this embodiment are not given in detail, and refer to the related descriptions in the foregoing embodiments, which are not described herein again.
By adopting the technical scheme of the invention, the heat exchange space with more than one group of air inlets and air outlets (one group of air inlets and air outlets is composed of one air inlet and one air outlet which are arranged on one air duct) is arranged, the total heat recovery core body assembly composed of more than two core bodies is arranged in the heat exchange space, the combination mode of the more than two core bodies is adjusted according to the actual air quantity requirement, the adjustment of the heat exchange area of the core bodies in the total heat recovery core body assembly is realized, the air resistance and the heat exchange efficiency are reasonably controlled, the unit resistance is effectively reduced, and the energy efficiency is further improved.
According to an embodiment of the present invention, a method for controlling heat exchange of a fresh air system corresponding to the fresh air system is also provided, as shown in fig. 8, which is a schematic flow chart of an embodiment of the method of the present invention. The heat exchange control method of the fresh air system can comprise the following steps: step S110 to step S130.
In step S110, under the condition that the fresh air system is turned on, the indoor environment temperature and humidity and the outdoor environment temperature and humidity of the air outlet are obtained at regular time.
At step S120, the enthalpy value of the indoor environment is determined according to the temperature and humidity of the indoor environment. And determining the enthalpy value of the outdoor environment according to the temperature and the humidity of the outdoor environment.
In step S130, the opening and closing of the air valves at the periphery of two or more total heat exchange cores and the air duct in the air valve assembly are controlled according to the indoor environment enthalpy value and the outdoor environment enthalpy value, so as to control the positions and the number of the total heat exchange cores participating in heat exchange in the two or more total heat exchange cores, and thus the heat exchange area of the two or more total heat exchange cores is adjusted.
According to the scheme of the invention, multi-mode selection can be realized through multi-air valve opening and closing control, the multi-air valve is adopted to control the participation quantity of the total heat recovery cores, the heat exchange efficiency is effectively adjusted according to the working condition, the problem of insufficient heat exchange caused by reducing air resistance in some related schemes is solved, and the energy efficiency is improved. Through utilizing many blast gates cooperative control, adjust core heat transfer area according to actual demand. And the multiple air valves are cooperatively controlled to reasonably control the wind resistance of the total heat exchange assembly. Through adopting many blast gates cooperative control, adjust the heat transfer area of total heat recovery core according to the actual demand, can solve the problem that current total heat recovery core can't adjust heat transfer ability according to the actual demand, can rationally control the windage. The participation quantity of the cores is controlled through the multi-air valve, the heat exchange efficiency is effectively adjusted according to the working condition, and the energy efficiency is improved.
In some embodiments, the step S130 of controlling the opening and closing of the air valves at the periphery of two or more total heat exchange cores and the air duct in the air valve assembly according to the indoor environment enthalpy value and the outdoor environment enthalpy value includes: and determining a difference value between the indoor environment enthalpy value and the outdoor environment enthalpy value, determining a ratio of the difference value to the indoor environment enthalpy value, and controlling the core assembly to work in any one of a single core mode, a double core mode and a multi-core mode according to a region of the ratio in a set ratio range.
The single core mode is a mode in which one total heat exchange core of the two or more total heat exchange cores participates in heat exchange, and the rest total heat exchange cores do not participate in heat exchange.
The double-core mode is a mode in which two of the total heat exchange cores participate in heat exchange, and the rest of the total heat exchange cores do not participate in heat exchange.
The multi-core mode is a mode in which two or more total heat exchange cores of the two or more total heat exchange cores participate in heat exchange, and the rest total heat exchange cores do not participate in heat exchange.
Fig. 6 is a schematic structural diagram of an embodiment of a combined control system of a controllable total heat exchange assembly, and is also a schematic structural diagram of an embodiment of a combined control system of a linkage-controlled total heat exchange core assembly. As shown in fig. 6, a combined control system of a controllable total heat exchange assembly is mainly composed of a detection system, a control system and an air valve core body device. The wind valve core body device comprises: the air valve component and the core body component (namely, the total heat exchange core body component) are connected and finely controlled, and the purposes of saving energy and improving the heat exchange efficiency can be achieved. The combined control system of the controllable total heat exchange assembly is internally provided with control logics of total heat recovery core assemblies (namely, the total heat exchange core assemblies) in four seasons of spring, summer, autumn and winter according to the change of seasons, so that different modes in different seasons can be switched. Through the improvement to wind gap intelligence control system, can effectively improve full heat exchange core application scene singleness, the limited problem of function.
In the example shown in fig. 6, the detection system is composed of a temperature sensor, a humidity sensor, a data processing module, and the like. The control system consists of a controller, control logic and a linkage control strategy. Examples of the temperature sensor and the humidity sensor include a temperature/humidity sensor 7, a temperature/humidity sensor 18, a temperature/humidity sensor 23, and a temperature/humidity sensor 31 shown in fig. 2. The system is mainly responsible for completing the integral operation of the component system. After the combined control system of the controllable total heat exchange assembly is started to operate, the detection system starts to operate, the temperature and humidity sensors start to work, the temperature and the humidity at the four air outlets of the combined control system of the controllable total heat exchange assembly are detected, after the detection is finished, data are sent to the data processing module to be processed, the enthalpy value of each air outlet is calculated, and the mode is selected according to the difference of the enthalpy values of the indoor side and the outdoor side.
Fig. 3 is a schematic structural view of an embodiment of a single core mode of an intelligent tuyere, fig. 4 is a schematic structural view of an embodiment of a double core mode of an intelligent tuyere, and fig. 5 is a schematic structural view of an embodiment of a triple core mode of an intelligent tuyere. The operation modes of the single core mode, the two core mode, and the three core mode are shown in fig. 3, 4, and 5.
The scheme of the invention is mainly set according to different quarterly conditions and regional conditions, different modes are switched by judging the difference between the outdoor air enthalpy value and the indoor air enthalpy value of the region, the operation mode of the heat exchange core body can be independently controlled, and the quantity of the heat exchange core bodies participating in the total heat exchange assembly is adjusted so as to control the heat exchange efficiency and the wind resistance of the total heat exchange assembly.
In some embodiments, in the case that two or more total heat exchange cores include a first total heat exchange core, a second total heat exchange core and a third total heat exchange core, the core assembly is controlled to operate in any one of a single-core mode, a double-core mode and a multi-core mode according to the section of the ratio in the set ratio range, including any one of the following control situations:
the first control scenario: if the ratio is greater than or equal to 0 and less than the lower limit of the set ratio range, the opening and closing of the air valves at the periphery of the third total heat exchange core and the air duct are controlled, and the closing of the other air valves is controlled, so that the core assembly is controlled to work in the single core mode.
The second control scenario: if the ratio is larger than or equal to the lower limit of the set ratio range and smaller than the upper limit of the set ratio range, the opening and closing of air valves at the peripheries of the first total heat exchange core and the second total heat exchange core and at the air duct are controlled, and the other air valves are controlled to be closed, so that the core assembly is controlled to work in the double-core mode.
The third control scenario: if the ratio is larger than or equal to the upper limit of the set ratio range, the opening and closing of air valves at the peripheries of the first full heat exchange core, the second full heat exchange core and the third full heat exchange core and at the air duct are controlled, and the other air valves are controlled to be closed, so that the core assembly is controlled to work in a three-core mode of the multi-core modes.
Fig. 7 is a flowchart illustrating an embodiment of a control method of an intelligent tuyere core mode. The control method of the intelligent tuyere core mode comprises the following steps:
step 1, detecting the temperature (Tinside/Toutside) and the humidity (d inside/d outside) at the indoor/outer air opening, and calculating the enthalpy value (h inside/h outside).
For example: and determining the dry bulb temperature T and the relative humidity RH according to the temperature (Tin/Tout) and the humidity (d in/d out) at the indoor/outdoor air port. Calculating the pressure P according to the dry bulb temperature T qb ：
P qb ＝0.1001974*T 3 -2.913509*T 2 +146.5131*T-234.5457。
From the relative humidity RH, the moisture content d:
d＝0.6221*P qb *RH/100/(101325-P qb *RH/100)*1000。
according to the dry bulb temperature T and the moisture content d, determining an air enthalpy value H:
H＝1.006*T+(2501+1.86*T)*d。
and 2, judging the (h inside-h outside)/h inside interval, and controlling the air valve core body device according to the judgment result so that the total heat recovery core body assembly works in any one of a single core body mode, a double core body mode and a three core body mode. See the following exemplary description.
And step 21, if the requirement (in h-out) and/or in h is less than 20%, starting the single-core model, and if the air valves at the periphery of the total heat exchange core 21 and the air duct are opened, controlling the total heat exchange core 21 to start. For example: the air valve (such as a shutter air valve) 20, the air valve 1, the air valve 25, the air valve 22, the air valve 10, the air valve 11, the air valve 9, the air valve 26 and the air valve 29 are opened, the rest air valves are all closed, and the fresh air and the return air are subjected to enthalpy exchange in the total heat exchange core body 21.
And step 21, if the conditions that the temperature is more than or equal to 20 percent (in-h-out)/in-h is less than 40 percent are met, starting the double-core mode, opening air valves at the peripheries of the total heat exchange core 4 and the total heat exchange core 14 and the air ducts of the total heat exchange core 4 and the total heat exchange core 14, and controlling the total heat exchange core 4 and the total heat exchange core 14 to start. For example: and opening the air valves 2, 5, 6, 3, 12, 13, 15, 16, 9, 17, 28 and 27, closing the rest air valves, and performing enthalpy exchange between the fresh air and the return air in the total heat exchange core 4 and the total heat exchange core 14.
And 23, if the two conditions are not met, and the ratio of (h inside-h outside)/h inside is not less than 40%, starting the three-core mode, opening the air valves at the peripheries of the total heat exchange core 4, the total heat exchange core 14 and the total heat exchange core 21 and the air passages of the total heat exchange core 4, the total heat exchange core 14 and the total heat exchange core 21, and controlling the total heat exchange core 4, the total heat exchange core 14 and the total heat exchange core 21 to be started. For example: the air valves 2, 5, 6, 3, 12, 13, 15, 16, 20, 1, 25, 22, 9, 17, 26 and 28 are opened, the rest are closed, and the fresh air and the return air are subjected to enthalpy exchange in the total heat exchange core 4, the total heat exchange core 14 and the total heat exchange core 21.
And 3, continuously and circularly detecting the temperature (Tinside/Toutside) and the humidity (d inside/d outside) at the indoor/outer air opening after the system operates for the preset time (T), and calculating the enthalpy value (hIn/hEx).
And 4, if the control system receives the ending instruction, shutting down the machine. And if the ending instruction is not received, continuing to run for the set time (t).
In the scheme of the invention, the total heat exchange core assembly can be installed in a refrigerating unit such as a fresh air fan, a cabinet air conditioner and the like which need a fresh air system. Through many blast gates cooperative control, make the subassembly freely switch operation physique quantity, when realizing low enthalpy value difference, reduce exchange efficiency, reduce the unit windage. When the high enthalpy value is poor, certain wind resistance is increased, and meanwhile, the exchange efficiency is improved, so that efficient utilization of energy is achieved, and cost is effectively reduced.
Since the processing and functions implemented by the method of this embodiment basically correspond to the embodiments, principles and examples of the fresh air system, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Adopt the technical scheme of this embodiment, through setting up the heat exchange space that has a set of above business turn over wind gap (a set of business turn over wind gap comprises an air intake and an air outlet that set up on an wind channel), set up the total heat recovery core subassembly that comprises the core more than two in this heat exchange space, the compound mode of core more than two is adjusted according to actual amount of wind demand, realize the adjustment to the heat transfer area of core in the total heat recovery core subassembly, with reasonable control windage and heat exchange efficiency, effectively adjust heat exchange efficiency according to the operating mode, improve the efficiency.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. A heat exchange apparatus, comprising: the air valve assembly, the core body assembly, the air port and the shell are arranged on the shell; the air port is arranged on the shell; the air valve assembly and the core body assembly are arranged inside the shell; wherein the content of the first and second substances,
the tuyere includes: an air inlet and an air outlet; the number of the air inlets is more than one, and the number of the air outlets is more than one;
the blast gate subassembly includes: an air valve; the number of the air valves is N, and N is a positive integer; the N air valves surround a heat exchange space; any one of the more than one air inlets and at least one of the more than one air outlets can form an air duct only through the heat exchange space;
the core assembly, comprising: more than two total heat exchange cores; more than two total heat exchange cores distributed in the heat exchange space; the positions and the number of the total heat exchange cores participating in heat exchange in the more than two total heat exchange cores can be controlled by controlling the opening and closing of the air valves at the peripheries of the more than two total heat exchange cores and the air passages in the air valve assembly, so that the heat exchange area of the more than two total heat exchange cores can be adjusted;
two or more total heat exchange cores described above, comprising: the first full heat exchange core, the second full heat exchange core and the third full heat exchange core;
under the condition that the heat exchange space is quadrilateral and each total heat exchange core body is quadrilateral, N air valves of the heat exchange space are enclosed to divide the heat exchange space into nine accommodating spaces; the first full heat exchange core, the second full heat exchange core and the third full heat exchange core are distributed in the nine accommodating spaces at intervals.
2. The heat exchange apparatus of claim 1, wherein the damper comprises: a shutter air valve.
3. The heat exchange device according to claim 1, wherein the nine accommodating spaces are arranged in a form of a squared figure;
the first full heat exchange core body is accommodated in a first accommodating space of the nine accommodating spaces; the second full heat exchange core body is accommodated in a third accommodating space of the nine accommodating spaces; and the third total heat exchange core body is accommodated in a seventh accommodating space of the nine accommodating spaces.
4. The heat exchange device of claim 1, wherein the membrane material of each of the total heat exchange cores of two or more total heat exchange cores comprises: paper film or polymer film.
5. The heat exchange device of claim 1, wherein each of the total heat exchange cores of two or more total heat exchange cores has a core support frame; the core support frame includes: any one of a blank plate frame, an injection molded part frame and a self-supporting frame.
6. A fresh air system, comprising: a heat exchange apparatus as claimed in any one of claims 1 to 5.
7. A heat exchange control method for a fresh air system according to claim 6, comprising:
under the condition that the fresh air system is started, regularly acquiring the indoor environment temperature and humidity and the outdoor environment temperature and humidity of the air port;
according to the indoor environment temperature and humidity, the indoor environment enthalpy value is ensured; determining an outdoor environment enthalpy value according to the outdoor environment temperature and humidity;
and controlling the opening and closing of air valves at the periphery of more than two total heat exchange cores and at an air duct in the air valve assembly according to the indoor environment enthalpy value and the outdoor environment enthalpy value so as to control the positions and the quantity of the total heat exchange cores participating in heat exchange in the more than two total heat exchange cores and realize the adjustment of the heat exchange area of the more than two total heat exchange cores.
8. The heat exchange control method of the fresh air system according to claim 7, wherein the controlling of the opening and closing of the air valves at the periphery of two or more total heat exchange cores and the air duct in the air valve assembly according to the indoor environment enthalpy value and the outdoor environment enthalpy value comprises:
determining the difference value between the indoor environment enthalpy value and the outdoor environment enthalpy value, determining the ratio of the difference value to the indoor environment enthalpy value, and controlling the core component to work in any one of a single-core mode, a double-core mode and a multi-core mode according to the interval of the ratio in a set ratio range;
the single-core mode is a mode in which one total heat exchange core of the more than two total heat exchange cores participates in heat exchange, and the rest total heat exchange cores do not participate in heat exchange;
the double-core mode is a mode in which two of the total heat exchange cores participate in heat exchange, and the rest of the total heat exchange cores do not participate in heat exchange;
the multi-core mode is a mode in which two or more total heat exchange cores of the two or more total heat exchange cores participate in heat exchange, and the rest total heat exchange cores do not participate in heat exchange.
9. The heat exchange control method of the fresh air system according to claim 8, wherein in a case where the two or more total heat exchange cores include a first total heat exchange core, a second total heat exchange core, and a third total heat exchange core, controlling the core assembly to operate in any one of a single core mode, a double core mode, and a multi core mode according to a range of the ratio in a set ratio range includes:
if the ratio is greater than or equal to 0 and less than the lower limit of the set ratio range, controlling the opening and closing of air valves at the periphery of the third total heat exchange core and the air duct, and controlling the closing of the rest air valves so as to control the core assembly to work in the single core mode;
if the ratio is greater than or equal to the lower limit of the set ratio range and less than the upper limit of the set ratio range, controlling the opening and closing of air valves at the peripheries of the first total heat exchange core and the second total heat exchange core and at the air duct and controlling the closing of the rest air valves so as to control the core assembly to work in the double-core mode;
if the ratio is larger than or equal to the upper limit of the set ratio range, the opening and closing of air valves at the peripheries of the first full heat exchange core, the second full heat exchange core and the third full heat exchange core and at the air duct are controlled, and the other air valves are controlled to be closed, so that the core assembly is controlled to work in a three-core mode of the multi-core modes.
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