CN115614888A - Fresh air handling unit, air conditioning system and control method of fresh air handling unit - Google Patents

Fresh air handling unit, air conditioning system and control method of fresh air handling unit Download PDF

Info

Publication number
CN115614888A
CN115614888A CN202211189903.XA CN202211189903A CN115614888A CN 115614888 A CN115614888 A CN 115614888A CN 202211189903 A CN202211189903 A CN 202211189903A CN 115614888 A CN115614888 A CN 115614888A
Authority
CN
China
Prior art keywords
fresh air
cooler
air
handling unit
fresh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211189903.XA
Other languages
Chinese (zh)
Inventor
李宏波
陈旭峰
苏丽芸
张斌
李俏楠
黄振兴
朱永康
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Metro Railway Group Co ltd
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Tianjin Metro Railway Group Co ltd
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Metro Railway Group Co ltd, Gree Electric Appliances Inc of Zhuhai filed Critical Tianjin Metro Railway Group Co ltd
Priority to CN202211189903.XA priority Critical patent/CN115614888A/en
Publication of CN115614888A publication Critical patent/CN115614888A/en
Priority to PCT/CN2023/102286 priority patent/WO2024066520A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
    • F28D5/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/228—Treatment of condensate, e.g. sterilising
    • 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
    • F24F2110/20—Humidity

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Fuzzy Systems (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Central Air Conditioning (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a fresh air handling unit, an air conditioning system and a control method thereof. The fresh air handling unit comprises a shell; an indirect evaporative cooler; a water pan; the surface air cooler, the surface air cooler slope set up in the casing, just the lower extreme of surface air cooler set up in on the water collector, the upper end of surface air cooler with the casing is sealed to be set up. According to the fresh air handling unit, the air conditioning system and the control method thereof, the indirect evaporative cooler is adopted to carry out primary heat exchange on fresh air and return air, the fresh air is cooled by the indirect evaporative cooler and is not contacted with condensate water, the dehumidification and cooling requirements at the surface air cooler are smaller, the heat exchange and dehumidification requirements of the surface air cooler are reduced, and the surface air cooler is obliquely arranged, so that the heat exchange area of the surface air cooler is increased, the heat exchange effect of the surface air cooler is increased, and the heat exchange efficiency of the fresh air handling unit is further increased.

Description

Fresh air handling unit, air conditioning system and control method thereof
Technical Field
The invention relates to the technical field of air processing equipment, in particular to a fresh air handling unit, an air conditioning system and a control method of the fresh air handling unit and the air conditioning system.
Background
In order to improve the overall energy efficiency ratio of the air conditioning system, the improvement of the energy efficiency ratio of the main machine can be greatly facilitated when the temperature of the outlet water of the refrigeration main machine is increased once, so that the medium-temperature water air conditioning system (the outlet temperature of the chilled water of the refrigeration main machine is 12 ℃/17 ℃) has better energy-saving performance compared with a common air conditioning water system (the outlet temperature of the chilled water of the refrigeration main machine is 7 ℃/12 ℃), but the medium-temperature water system in a summer heat area cannot achieve the expected effect when treating high-temperature and high-humidity fresh air, and cannot efficiently treat the high-temperature and high-humidity fresh air to the dew point temperature. Therefore, how to efficiently utilize heat recovery is the main solution for the above situation
In the prior art, the return air is generally adopted as the evaporated working air to directly evaporate and exchange heat with water twice, the two heat exchanges are respectively and indirectly precooled with fresh air, then the fresh air is directly evaporated, exchanged and cooled with water, and finally supplied with air through a surface cooler. But because the size requirement of new fan group can restrict the size of surface cooler, cause new fan group to have the problem that heat exchange efficiency is low.
Disclosure of Invention
In order to solve the technical problem of low heat exchange efficiency of the fresh air handling unit, the fresh air handling unit is obliquely provided with the surface air cooler to increase the heat exchange efficiency, the air conditioning system and the control method of the air conditioning system.
To this end, the present invention provides a fresh air handling unit comprising:
the fresh air inlet, the fresh air outlet, the return air inlet and the return air outlet are arranged on the shell;
the indirect evaporative cooler is arranged in the shell, a return air channel and a fresh air channel are formed in the indirect evaporative cooling, the return air channel is communicated with the return air inlet and the return air outlet, and the fresh air channel is communicated with the fresh air inlet and the fresh air outlet;
the surface cooler, the surface cooler slope set up in the casing, just the surface cooler is located indirect evaporative cooler with between the new trend air outlet.
The fresh air handling unit further comprises a water receiving disc, the water receiving disc is located between the indirect evaporative cooler and the surface air cooler, the lower end of the surface air cooler is arranged on the water receiving disc, and the upper end of the surface air cooler is arranged on the shell.
The quantity of surface cooler is at least two, all the surface cooler is the inverted-table-shape and distributes in the water collector with between the fresh air outlet, and each the lower extreme of surface cooler all set up in on the water collector, each the upper end of surface cooler all set up in on the casing.
The quantity of surface cooler is four, four the surface cooler is the frustum of a pyramid shape and distributes in the water collector with between the new trend air outlet, every the surface cooler is located on a side of frustum of a pyramid shape.
The casing is the cuboid structure, the upper end border of surface cooler is with adjacent the inner wall of casing is parallel.
The included angle range of the plane of the surface cooler and the horizontal plane is 30-50 degrees.
The fresh air handling unit still includes the blast gate, the blast gate set up in the upper end of surface cooler with between the casing.
The quantity of surface cooler is a plurality of, each the upper end of surface cooler with all be provided with one between the casing the blast gate.
The upper ends of all the surface coolers surround a surface cooling air outlet together, and the ratio of the flow area of the surface cooling air outlet to the sum of the flow areas of all the air valves ranges from 1:1 to 1.1.
And the water outlet of the water pan is communicated with the water inlet of the indirect evaporative cooler.
The indirect evaporative cooler includes:
a housing;
the evaporation cold core body is arranged in the shell, the return air channel is formed between the evaporation cold core body and the inner surface of the shell, and the fresh air channel is formed inside the evaporation cold core body;
the water distributor is positioned above the evaporation cold core body, and the water outlet of the water distributor faces the evaporation cold core body;
the water outlet of the water receiving tray is communicated with the inlet of the water distributor.
The evaporative cooling core comprises a plurality of heat exchange tubes, all the heat exchange tubes are arranged in the shell, the fresh air channel is formed inside the heat exchange tubes, and the return air channel is formed between the heat exchange tubes and the shell.
The fresh air unit further comprises a fresh air fan, and the fresh air fan is arranged between the fresh air outlet and the surface air cooler.
The fresh air unit further comprises an indoor fresh air outlet, and the indoor fresh air outlet is communicated with the fresh air outlet through an air pipe.
An air conditioning system comprises the fresh air handling unit.
The air conditioning system further comprises a refrigeration host and an indoor unit, the refrigeration host is connected with the surface air cooler to form a first heat exchange cycle, and the indoor unit is connected with the refrigeration host to form a second heat exchange cycle.
A control method of the air conditioning system, wherein the fresh air handling unit further includes an air valve, and the air valve is disposed between an upper end of the surface air cooler and the casing, and the method includes:
acquiring a gas temperature parameter and a gas humidity parameter of a fresh air handling unit;
and controlling the working state of the air valve according to the gas temperature parameter and the gas humidity parameter.
The gas temperature parameters at least comprise an indoor target temperature T0, an outdoor fresh air temperature Tw, an indoor temperature Tn and a preset temperature difference value delta T;
the gas humidity parameters at least comprise indoor target relative humidity phi 0, outdoor fresh air humidity phi w, indoor humidity phi n and a preset humidity difference value delta phi.
In controlling the operating state of the damper according to the gas temperature parameter and the gas humidity parameter, the method further includes:
and if the gas temperature parameter and the gas humidity parameter accord with a first preset condition, controlling the air valve to be switched to a closed state.
The first predetermined condition is | Tn-T0| >. DeltaT and | φ n- φ 0| >. Deltaφ.
The fresh air handling unit further comprises a refrigeration host, the refrigeration host is connected with the surface air cooler to form a first heat exchange cycle, and the method further comprises the following steps:
if Tn-T0 is more than 0, the working frequency of the refrigeration main machine is increased.
The fresh air handling unit further comprises a fresh air fan, the fresh air fan is arranged between the fresh air outlet and the surface air cooler, and the method further comprises the following steps:
if Tn-T0 is less than 0, the working frequency of the fresh air fan is reduced.
Fresh air unit still includes the refrigeration host computer, the refrigeration host computer with the surface cooler is connected and is formed first heat transfer circulation, still includes after reducing the operating frequency of new trend fan:
when the working frequency of the fresh air fan is reduced to the minimum working frequency, if Tn-T0 is less than 0, the working frequency of the refrigeration host is reduced.
The fresh air handling unit further comprises an indoor unit, and the method further comprises the following steps:
if Tw is larger than Tn, controlling the indoor unit to work;
if Tw is less than or equal to Tn, controlling the indoor unit to stop working.
According to the fresh air handling unit, the air conditioning system and the control method thereof, the indirect evaporative cooler is adopted to enable the fresh air and the return air to carry out primary heat exchange, the fresh air is cooled by the indirect evaporative cooler and does not contact with condensate water, the dehumidifying and cooling requirements at the surface cooler are smaller, the heat exchanging and dehumidifying requirements of the surface cooler are reduced, and the surface cooler is obliquely arranged, so that the heat exchanging area of the surface cooler is increased, the heat exchanging effect of the surface cooler is increased, and the heat exchanging efficiency of the fresh air handling unit is increased.
Drawings
Fig. 1 is a schematic structural diagram of a fresh air handling unit according to an embodiment of the present invention;
fig. 2 is a top view of a fresh air handling unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an evaporative cooling core provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention;
in the figure:
1. a housing; 11. a fresh air inlet; 12. a fresh air outlet; 13. an air return inlet; 14. an air return outlet; 2. an indirect evaporative cooler; 21. an air return channel; 22. a fresh air channel; 3. a water pan; 4. a surface cooler; 5. an air valve; 23. a housing; 24. evaporating the cold core body; 25. a water distributor; 241. a heat exchange pipe; 242. a fin; 6. a fresh air fan; 7. an indoor unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The fresh air handling unit shown in fig. 1 to 4 includes: the air conditioner comprises a shell 1, wherein a fresh air inlet 11, a fresh air outlet 12, a return air inlet 13 and a return air outlet 14 are formed in the shell 1; the indirect evaporative cooler 2 is arranged in the shell 1, a return air channel 21 and a fresh air channel 22 are formed in the indirect evaporative cooler, the return air channel 21 is communicated with the return air inlet 13 and the return air outlet 14, the fresh air channel 22 is communicated with the fresh air inlet 11 and the fresh air outlet 12, and the fresh air outlet 12 is positioned above the indirect evaporative cooler 2; surface air cooler 4, surface air cooler 4 slope set up in the casing 1, just surface air cooler 4 is located indirect evaporative cooler 2 with between the new trend air outlet 12. Adopt indirect evaporative cooler 2 to make new trend and return air carry out the heat exchange once, the new trend has passed through indirect evaporative cooler 2's cooling to not contact with the comdenstion water, the dehumidification cooling demand of 4 departments of surface cooler is less this moment, reduces the heat transfer dehumidification demand of surface cooler 4, and through setting up surface cooler 4 slope, increase the heat transfer area of surface cooler 4, thereby increase the heat transfer effect of surface cooler 4, and then increase the heat exchange efficiency of new trend unit.
The fresh air handling unit still includes water collector 3, water collector 3 is located indirect evaporative cooler 2 with between the surface cooler 4, the lower extreme of surface cooler 4 set up in on the water collector 3, the upper end of surface cooler 4 set up in on the casing 1. The condensate water of the surface cooler 4 is received by the water receiving disc 3, so that the condensate water of the surface cooler 4 is prevented from dropping on the indirect evaporative cooler 2 to influence the normal work of the indirect evaporative cooler 2.
When the fresh air handling unit works, the return air enters the return air channel 21 from the return air inlet 13 and is evaporated and heat exchanged with water in the return air channel 21, so that the temperature of the fresh air channel 22 is effectively reduced, the return air after heat exchange is cooled in the fresh air channel 22 cooled by the surface air cooler 4 after being cooled in the fresh air channel 22 cooled by the return air and water, and the fresh air enters the fresh air channel 22 from the fresh air inlet 11 and is finally discharged out of the shell 1 from the fresh air outlet 12. Because the new trend has passed through indirect evaporative cooler 2's cooling to do not contact with the comdenstion water, it is less to the dehumidification cooling demand of 4 departments of surface cooler, and the surface cooler 4's that also needs heat transfer area is less, sets up the slope of surface cooler 4 simultaneously, increases the heat transfer area of surface cooler 4 as far as, thereby under the unchangeable circumstances of the volume of guaranteeing casing 1, can increase the heat exchange efficiency of new fan group.
The fresh air inlet 11 is located below the indirect evaporative cooler 2, the return air inlet 13 is located on one side of the indirect evaporative cooler 2, and the return air outlet 14 is located on the other side of the indirect evaporative cooler 2.
As an implementation manner, the number of the surface air coolers 4 is at least two, all the surface air coolers 4 are distributed between the water pan 3 and the fresh air outlet 12 in an inverted frustum shape, the lower end of each surface air cooler 4 is arranged on the water pan 3, and the upper end of each surface air cooler 4 is arranged on the casing 1. Under the condition that does not change 1 size of casing, increase the quantity of surface cooler 4 as far as to increase the whole heat transfer area of surface cooler 4, and then increase fresh air handling unit's heat exchange efficiency.
The shape of the truncated cone comprises a truncated pyramid shape and a truncated cone shape, and the inverted truncated cone shape refers to the shape of the truncated cone with the bottom surface with a smaller area as the lower bottom surface and the bottom surface with a larger area as the upper bottom surface. In the embodiment, the water receiving tray 3 forms a lower surface of a table body shape, and the upper ends of the surface air coolers 4 jointly enclose an upper surface of the table body shape.
Taking the shape of a table body as an example of a prismoid shape, the number of the surface air coolers 4 is four, the four surface air coolers 4 are distributed between the water receiving tray 3 and the fresh air outlet 12 in a shape of a truncated pyramid, and each surface air cooler 4 is positioned on one side surface of the shape of the truncated pyramid.
Preferably, casing 1 is the cuboid structure, the upper end border of surface cooler 4 is parallel with adjacent casing 1's inner wall. Make full use of casing 1's cuboid structure makes the shape of surface cooler 4 and casing 1's shape looks adaptation as far as to increase the heat transfer area of the size of surface cooler 4 in order to increase surface cooler 4, improve fresh air unit's heat exchange efficiency.
The included angle between the plane of the surface cooler 4 and the horizontal plane is 30-50 degrees. Preferably, the angle of the included angle is 40 °. When the angle of contained angle is less than 30 when, the inclination undersize of surface cooler 4, place for surface cooler 4 level, under the condition of 1 cross sectional area of the same casing, the heat transfer area of surface cooler 4 promotes lessly, can not effectual improvement fresh air unit's heat exchange efficiency, and when the angle of contained angle is greater than 50, the inclination of surface cooler 4 is too big, place for surface cooler 4 level, under the condition of the same casing 1 height, the heat transfer area of surface cooler 4 promotes lessly, can not effectual improvement fresh air unit's heat exchange efficiency, only when the contained angle is in 30 to 50 within ranges, the heat transfer area of surface cooler 4 promotes greatly, can satisfy the mesh that promotes 4 heat transfer efficiency of surface cooler, thereby improve fresh air unit's heat exchange efficiency.
Fresh air unit still includes blast gate 5, blast gate 5 set up in the upper end of surface cooler 4 with between the casing 1. Utilize blast gate 5 with 4 short circuits of surface cooler, fresh air channel 22 exhaust new trend can directly flow to fresh air outlet 12 departments through blast gate 5, and the new trend does not pass through surface cooler 4 this moment. Outdoor fresh air temperature and indoor temperature when fresh air handling unit position differ little, can directly introduce the new trend to indoor, open blast gate 5, the new trend directly enters into fresh air outlet 12 department through blast gate 5, realizes the indoor purpose of sending into the new trend, effectual reduction windage to reduce fresh air handling unit's energy consumption.
Optionally, the number of the surface air coolers 4 is multiple, and one air valve 5 is arranged between the upper end of each surface air cooler 4 and the shell 1. Utilize blast gate 5 to carry out the short circuit with the surface cooler 4 that corresponds, produced windage when reducing new trend and flowing through surface cooler 4 as far as to improve the air supply amount of wind and the air supply speed of new trend unit, improve new trend unit's heat exchange efficiency.
Preferably, the upper ends of all the surface coolers 4 together enclose a surface cooling air outlet, and the ratio of the flow area of the surface cooling air outlet to the sum of the flow areas of all the air valves 5 ranges from 1:1 to 1.1. Because there is the windage in 4 departments of surface cooler for most air current all circulates through blast gate 5, and effectual reduction windage, thereby reduce fresh air handling unit's energy consumption.
The delivery port of water collector 3 with the water inlet intercommunication of indirect evaporative cooler 2, also regard the comdenstion water of the surface cooler 4 of accepting in the water collector 3 as indirect evaporative cooler 2's water source, reduce the use of outside water source to reduce the use of drive parts such as water pump, reach the purpose that reduces the energy consumption of new fan group, the waste water of the new fan group of rational utilization, can also be with the help of the microthermal advantage of comdenstion water, required cold volume when further reducing the cooling new trend, further reduce the energy consumption of new fan group.
The indirect evaporative cooler 2 includes: a housing 23; the evaporation cooling core body 24 is arranged in the shell 23, the return air channel 21 is formed between the evaporation cooling core body 24 and the inner surface of the shell 23, and the fresh air channel 22 is formed inside the evaporation cooling core body 24; the water distributor 25 is positioned above the evaporation cold core body 24, and the water outlet of the water distributor 25 faces the evaporation cold core body 24; the water outlet of the water receiving tray 3 is communicated with the inlet of the water distributor 25. The return air enters the return air channel 21 from the outside of the shell 23 and exchanges heat with water supplied by the water distributor 25 to the return air channel 21 in the return air channel 21 to achieve the purpose of reducing the temperature of the fresh air channel 22, the return air after heat exchange is discharged out of the shell 23 to finish the heat exchange of the return air, the fresh air enters the fresh air channel 22 from the outside of the shell 23 and is cooled in the fresh air channel 22, and finally the fresh air is discharged out of the shell 23 to finish the fresh air cooling process.
The evaporation cooling core body 24 comprises a plurality of heat exchange tubes 241, all the heat exchange tubes 241 are arranged in the shell 23, the fresh air channel 22 is formed inside the heat exchange tubes 241, and the return air channel 21 is formed between the heat exchange tubes 241 and the shell 23.
The evaporation cooling core body 24 further comprises a plurality of fins 242, all the fins 242 are arranged on the heat exchange tube 241, the fins 242 are mutually two, the return air channel 21 is formed between the fins 242, the evaporation heat exchange effect between the return air and the water is further increased by utilizing the fins 242, and therefore the cooling effect of the evaporation cooling core body 24 on the fresh air is improved.
The fresh air unit further comprises a fresh air fan 6, and the fresh air fan 6 is arranged between the fresh air outlet 12 and the surface air cooler 4. The fresh air fan 6 can generate negative pressure at the fresh air outlet 12, so that outdoor fresh air is forced to flow to the fresh air fan 6 through the fresh air inlet 11, the fresh air channel 22 and the surface air cooler 4 (or the air valve 5) in sequence, and finally is discharged to the indoor space through the driving of the fresh air fan 6, and the supply of the fresh air is completed. Set up new trend fan 6 in the top of surface cooler 4, the direction of height size of utilization casing 1 that can be abundant to reduce the area occupied of casing 1.
The fresh air unit also comprises an indoor fresh air outlet which is communicated with the fresh air outlet 12 through an air pipe. Wherein an air pipe is communicated between the indoor fresh air outlet and the fresh air outlet 12.
An air conditioning system comprises the fresh air handling unit.
The air conditioning system further comprises a refrigeration host, and the refrigeration host is connected with the surface air cooler 4 to form a first heat exchange cycle. The refrigeration host can provide chilled water for the surface air cooler 4 so that the surface air cooler 4 can cool fresh air.
The fresh air handling unit further comprises an indoor unit 7, and the indoor unit 7 is connected with the refrigeration host machine to form a second heat exchange cycle. The indoor unit 7 can directly adjust the indoor temperature and humidity without supplying fresh air.
In the control method of the air conditioning system, the fresh air handling unit further includes an air valve 5, the air valve 5 is disposed between the upper end of the surface air cooler 4 and the casing 1, and the method includes:
acquiring a gas temperature parameter and a gas humidity parameter of a fresh air handling unit;
and controlling the working state of the air valve 5 according to the air temperature parameter and the air humidity parameter. Make fresh air handling unit can adjust the operating condition of blast gate 5 according to the indoor outer operating mode of difference to whether control cold ware 4 carries out work, reduce fresh air handling unit's energy consumption as far as.
The gas temperature parameters at least comprise an indoor target temperature T0, an outdoor fresh air temperature Tw, an indoor temperature Tn and a preset temperature difference value delta T;
the gas humidity parameters at least comprise indoor target relative humidity phi 0, outdoor fresh air humidity phi w, indoor humidity phi n and a preset humidity difference value delta phi.
In controlling the working state of the damper 5 according to the gas temperature parameter and the gas humidity parameter, the method further includes:
and if the gas temperature parameter and the gas humidity parameter accord with a first preset condition, controlling the air valve 5 to be switched to a closed state.
The first predetermined condition is | Tn-T0| >. DeltaT and | φ n- φ 0| >. Deltaφ. Show that the condition of outdoor new trend this moment is relatively poor, it is indoor great to accord with, and fresh air unit needs to use surface cooler 4 to cool down the new trend this moment, consequently closes blast gate 5, makes the new trend must flow through surface cooler 4, realizes the cooling to the new trend.
The fresh air handling unit further comprises a refrigeration host, the refrigeration host is connected with the surface air cooler 4 to form a first heat exchange cycle, and the method further comprises the following steps:
if Tn-T0 is larger than 0, the indoor temperature Tn is higher than the indoor target temperature value T0 at the moment, and the difference is larger, the working frequency of the refrigeration host is increased, the temperature of the chilled water is further reduced, the temperature of the fresh air passing through the surface air cooler 4 is further reduced, and the indoor temperature is further reduced.
The fresh air handling unit further comprises a fresh air fan 6, the fresh air fan 6 is arranged between the fresh air outlet 12 and the surface air cooler 4, and the method further comprises the following steps:
if Tn-T0 is less than 0, the indoor temperature Tn is lower than the indoor target temperature value T0 at the moment, and the difference is larger, the working frequency of the fresh air fan 6 is reduced, the amount of fresh air fed into the room is gradually reduced, and therefore the refrigeration of the indoor temperature is reduced.
Fresh air unit still includes the refrigeration host computer, the refrigeration host computer with surface cooler 4 connects and forms first heat transfer circulation, still includes after reducing the operating frequency of fresh air fan 6:
if Tn-T0 is less than 0, the working frequency of the fresh air fan 6 is reduced, and the indoor temperature cannot be increased, so that the working frequency of the refrigeration host is reduced, the temperature of the chilled water is increased, the temperature of the fresh air passing through the surface air cooler 4 is increased, and the refrigeration of the indoor temperature is reduced.
Particularly, when the working frequency of the fresh air fan 6 is reduced to the minimum working frequency, the working frequency of the fresh air fan 6 cannot be reduced at this time, and therefore, the working frequency of the refrigeration host machine can only be reduced.
The fresh air handling unit further comprises an indoor unit 7, the indoor unit 7 is connected with the refrigeration host machine to form a second heat exchange cycle, the indoor unit 7 can adjust indoor temperature and humidity without sending fresh air into the room, and the method further comprises the following steps:
if Tw is greater than Tn, the temperature of the outdoor fresh air is too high, and the indoor unit 7 is required to participate in cooling the indoor, and the indoor unit 7 is controlled to work;
if Tw is less than or equal to Tn, the temperature of the outdoor fresh air is low, and the indoor unit 7 is not required to cool the indoor, and the indoor unit 7 is controlled to stop working.
In controlling the working state of the damper 5 according to the gas temperature parameter and the gas humidity parameter, the method further includes:
and if the gas temperature parameter and the gas humidity parameter accord with a second preset condition, controlling the air valve 5 to be switched to an opening state.
The second preset condition comprises Tw is less than or equal to Tn, and | Tn-T0| is less than Delta T and | φ n- φ 0| <Deltaφ. Outdoor temperature is lower this moment, and indoor load can scatter and disappear through room gap isotructure, does not need surface cooler 4 to work this moment, can directly introduce outdoor new trend to indoor can, open blast gate 5 this moment, the new trend directly flows new trend air outlet 12 and sends into indoorly through blast gate 5 to accomplish the supply of indoor new trend.
In order to avoid frequent adjustment of the fresh air unit, the fresh air unit detects the outdoor fresh air temperature Tw, the indoor temperature Tn, the outdoor fresh air humidity Phiw and the indoor humidity Phin at intervals of set time, and correspondingly adjusts the fresh air temperature Tw, the indoor temperature Tn, the outdoor fresh air humidity Phiw and the indoor humidity Phin according to detection results.
Wherein the set time is preferably 30min.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (24)

1. A fresh air handling unit is characterized in that: the method comprises the following steps:
the air conditioner comprises a shell (1), wherein a fresh air inlet (11), a fresh air outlet (12), a return air inlet (13) and a return air outlet (14) are arranged on the shell (1);
the indirect evaporative cooler (2) is arranged in the shell (1), a return air channel (21) and a fresh air channel (22) are formed in the indirect evaporative cooler, the return air channel (21) is communicated with the return air inlet (13) and the return air outlet (14), and the fresh air channel (22) is communicated with the fresh air inlet (11) and the fresh air outlet (12);
surface air cooler (4), surface air cooler (4) slope set up in casing (1), just surface air cooler (4) are located indirect evaporative cooler (2) with between new trend air outlet (12).
2. The fresh air handling unit according to claim 1, wherein: the fresh air handling unit still includes water collector (3), water collector (3) are located indirect evaporative cooler (2) with between surface cooler (4), the lower extreme of surface cooler (4) set up in on water collector (3), the upper end of surface cooler (4) set up in on casing (1).
3. The fresh air handling unit of claim 2, wherein: the quantity of surface cooler (4) is at least two, all surface cooler (4) are the inverted platform shape and distribute in water collector (3) with between fresh air outlet (12), and each the lower extreme of surface cooler (4) all set up in on the water collector (3), each the upper end of surface cooler (4) all set up in on casing (1).
4. The fresh air handling unit according to claim 2, wherein: the quantity of surface cooler (4) is four, four surface cooler (4) are chamfered frustum shape and distribute in water collector (3) with between new trend air outlet (12), every surface cooler (4) are located on a side of chamfered frustum shape.
5. The fresh air handling unit of claim 4, wherein: casing (1) is the cuboid structure, the upper end border of surface cooler (4) is with adjacent the inner wall of casing (1) is parallel.
6. The fresh air handling unit of claim 1, wherein: the included angle range of the plane of the surface cooler (4) and the horizontal plane is 30-50 degrees.
7. The fresh air handling unit according to claim 1, wherein: fresh air unit still includes blast gate (5), blast gate (5) set up in the upper end of surface cooler (4) with between casing (1).
8. The fresh air handling unit of claim 7, wherein: the quantity of surface cooler (4) is a plurality of, each the upper end of surface cooler (4) with all be provided with one between casing (1) blast gate (5).
9. The fresh air handling unit of claim 8, wherein: the upper ends of all the surface coolers (4) jointly enclose a surface cooling air outlet, and the ratio range of the flow area of the surface cooling air outlet to the sum of the flow areas of all the air valves (5) is 1:1-1.1.
10. The fresh air handling unit of claim 2, wherein: and the water outlet of the water pan (3) is communicated with the water inlet of the indirect evaporative cooler (2).
11. The fresh air handling unit of claim 10 wherein: the indirect evaporative cooler (2) comprises:
a housing (23);
the evaporation cooling core body (24) is arranged in the shell (23), the return air channel (21) is formed between the evaporation cooling core body (24) and the inner surface of the shell (23), and the fresh air channel (22) is formed inside the evaporation cooling core body (24);
the water distributor (25) is positioned above the evaporation cold core (24), and the water outlet of the water distributor (25) faces the evaporation cold core (24);
the water outlet of the water receiving tray (3) is communicated with the inlet of the water distributor (25).
12. The fresh air handling unit of claim 11 wherein: the evaporation cooling core body (24) comprises a plurality of heat exchange tubes (241), all the heat exchange tubes (241) are arranged in the shell (23), the inside of the heat exchange tubes (241) forms the fresh air channel (22), and the heat exchange tubes (241) and the shell (23) form the return air channel (21).
13. The fresh air handling unit of claim 1, wherein: the fresh air unit further comprises a fresh air fan (6), and the fresh air fan (6) is arranged at the fresh air outlet (12).
14. The fresh air handling unit of claim 1, wherein: the fresh air unit further comprises an indoor fresh air outlet, and the indoor fresh air outlet is communicated with the fresh air outlet (12) through an air pipe.
15. An air conditioning system characterized by: comprising the fresh air handling unit of any of claims 1 to 14.
16. The air conditioning system of claim 15, wherein: the air conditioning system further comprises a refrigeration host and an indoor unit (7), the refrigeration host is connected with the surface air cooler (4) to form a first heat exchange cycle, and the indoor unit (7) is connected with the refrigeration host to form a second heat exchange cycle.
17. A control method of an air conditioning system according to claim 15 or 16, characterized in that: the fresh air handling unit further comprises an air valve (5), the air valve (5) is arranged between the surface air cooler (4) and the shell (1), and the method comprises the following steps:
acquiring a gas temperature parameter and a gas humidity parameter of a fresh air handling unit;
and controlling the working state of the air valve (5) according to the air temperature parameter and the air humidity parameter.
18. The method of claim 17, wherein:
the gas temperature parameters at least comprise an indoor target temperature T0, an outdoor fresh air temperature Tw, an indoor temperature Tn and a preset temperature difference value delta T;
the gas humidity parameters at least comprise indoor target relative humidity phi 0, outdoor fresh air humidity phi w, indoor humidity phi n and a preset humidity difference value delta phi.
19. The method of claim 18, wherein: in controlling the operating state of the damper (5) according to the gas temperature parameter and the gas humidity parameter, further comprising:
and if the gas temperature parameter and the gas humidity parameter accord with a first preset condition, controlling the air valve (5) to be switched to a closed state.
20. The method of claim 19, wherein:
the first predetermined condition is | Tn-T0| >. DeltaT and | φ n- φ 0| >. Deltaφ.
21. The method of claim 20, wherein: the fresh air handling unit further comprises a refrigeration host, the refrigeration host is connected with the surface cooler (4) to form a first heat exchange cycle, and the method further comprises the following steps:
if Tn-T0 is more than 0, the working frequency of the refrigeration main machine is increased.
22. The method of claim 20, wherein: the fresh air handling unit further comprises a fresh air fan (6), the fresh air fan (6) is arranged at the fresh air outlet (12), and the method further comprises the following steps:
if Tn-T0 is less than 0, the working frequency of the fresh air fan (6) is reduced.
23. The method of claim 22, wherein: fresh air unit still includes the refrigeration host computer, the refrigeration host computer with surface cooler (4) are connected and are formed first heat transfer circulation, still include after reducing the operating frequency of new trend fan (6):
when the working frequency of the fresh air fan (6) is reduced to the minimum working frequency, if Tn-T0 is less than 0, the working frequency of the refrigeration host is reduced.
24. The method according to any one of claims 19 to 23, wherein: the fresh air handling unit further comprises an indoor unit (7), and the method further comprises the following steps:
if Tw is larger than Tn, controlling the indoor unit (7) to work;
if Tw is less than or equal to Tn, controlling the indoor unit (7) to stop working.
CN202211189903.XA 2022-09-28 2022-09-28 Fresh air handling unit, air conditioning system and control method of fresh air handling unit Pending CN115614888A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202211189903.XA CN115614888A (en) 2022-09-28 2022-09-28 Fresh air handling unit, air conditioning system and control method of fresh air handling unit
PCT/CN2023/102286 WO2024066520A1 (en) 2022-09-28 2023-06-26 Fresh air unit, air-conditioning system and control method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211189903.XA CN115614888A (en) 2022-09-28 2022-09-28 Fresh air handling unit, air conditioning system and control method of fresh air handling unit

Publications (1)

Publication Number Publication Date
CN115614888A true CN115614888A (en) 2023-01-17

Family

ID=84859965

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211189903.XA Pending CN115614888A (en) 2022-09-28 2022-09-28 Fresh air handling unit, air conditioning system and control method of fresh air handling unit

Country Status (2)

Country Link
CN (1) CN115614888A (en)
WO (1) WO2024066520A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024066520A1 (en) * 2022-09-28 2024-04-04 珠海格力电器股份有限公司 Fresh air unit, air-conditioning system and control method therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5386849B2 (en) * 2008-04-15 2014-01-15 パナソニック株式会社 Heat exchange device and heating element storage device using the same
CN106225086B (en) * 2016-09-13 2019-04-12 西安交通大学 A kind of indoor fresh air register
CN207599911U (en) * 2017-11-24 2018-07-10 依米康科技集团股份有限公司 A kind of modularization air-conditioner set
CN114667042A (en) * 2022-03-31 2022-06-24 广东海悟科技有限公司 Indirect evaporative cooling equipment and control method
CN114688626A (en) * 2022-03-31 2022-07-01 厦门呼博仕环境工程产业股份有限公司 Fresh air conditioner all-in-one machine
CN115614888A (en) * 2022-09-28 2023-01-17 珠海格力电器股份有限公司 Fresh air handling unit, air conditioning system and control method of fresh air handling unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024066520A1 (en) * 2022-09-28 2024-04-04 珠海格力电器股份有限公司 Fresh air unit, air-conditioning system and control method therefor

Also Published As

Publication number Publication date
WO2024066520A1 (en) 2024-04-04

Similar Documents

Publication Publication Date Title
CN106247501A (en) Data center is with closing the passage of heat full return air dry air energy central air conditioner system
CN108679774A (en) A kind of progress control method of fresh air system and fresh air system
CN110131816B (en) Auxiliary machinery refrigerated water side evaporative cooling system
CN106369718A (en) Modular energy-saving refrigerating device for data center
CN211792609U (en) Indirect evaporative cooling air conditioning unit for data center
CN115614888A (en) Fresh air handling unit, air conditioning system and control method of fresh air handling unit
CN110500669B (en) Double-return-air step dehumidification air conditioning system
CN111295084A (en) Indirect evaporative cooling air conditioning unit using condenser and evaporator
CN218379794U (en) Fresh air handling unit and air conditioning system
CN110631149B (en) High-efficiency energy-saving evaporation refrigeration machine room air conditioning device
CN202709356U (en) Split type evaporative cooling and semiconductor refrigeration compound air conditioner
CN210247353U (en) Container type data center is with putting a top air conditioner
CN213810941U (en) Indirect evaporative cooler
CN112146211A (en) Water-cooling three-mode machine room air conditioner
CN102734973A (en) Special dual-temperature high efficiency water source heat pump unit for capillary radiation air conditioning system
CN112268326A (en) Indirect evaporative cooler and control method
CN216361425U (en) Indirect evaporative cooling system
CN219761728U (en) Indirect evaporative cooling apparatus
CN218120081U (en) Fresh air handling unit
CN216953334U (en) Double-spraying heat pipe type indirect evaporative cooling unit
CN213931242U (en) Water-cooling three-mode machine room air conditioner
CN212870058U (en) Machine room heat extraction system
CN218455260U (en) Energy-saving indirect evaporation air conditioning unit
CN216844940U (en) Data center heat exchange system based on multi-split air conditioner
CN219612378U (en) Indirect evaporative cooling system of machine room cabinet

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination