CN110701691A - Fresh air handling unit and control method - Google Patents

Fresh air handling unit and control method Download PDF

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Publication number
CN110701691A
CN110701691A CN201910971678.7A CN201910971678A CN110701691A CN 110701691 A CN110701691 A CN 110701691A CN 201910971678 A CN201910971678 A CN 201910971678A CN 110701691 A CN110701691 A CN 110701691A
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China
Prior art keywords
air
water
inlet
outlet
cooled condenser
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Granted
Application number
CN201910971678.7A
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Chinese (zh)
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CN110701691B (en
Inventor
张龙爱
王传华
唐育辉
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201910971678.7A priority Critical patent/CN110701691B/en
Publication of CN110701691A publication Critical patent/CN110701691A/en
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Publication of CN110701691B publication Critical patent/CN110701691B/en
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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
    • 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
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air 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
    • F24F11/62—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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F24F3/12—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 treatment of the air otherwise than by heating and cooling
    • F24F3/14—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 treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • 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
    • F24F7/007—Ventilation with forced flow
    • 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

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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)
  • Drying Of Gases (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application relates to a fresh air handling unit and a control method, and belongs to the technical field of fresh air equipment. The application includes: the inlet of the water meter cooler is connected with the outlet of the cold water source; the water-cooled condenser is characterized in that a first flow path and a second flow path which are connected in parallel are formed on the water inlet side of the water-cooled condenser, the water inlet of the water-cooled condenser is connected with the outlet of the water meter cooler through the first flow path, and the water inlet of the water-cooled condenser is also connected with the outlet of a cold water source through the second flow path. Through this application, can adjust the heat exchange water that obtains water-cooled condenser with the heat that water gauge cooler and air inlet heat exchange acquireed, help realizing single cold water source water supply to help reduce cost, reduce the energy consumption, promote the efficiency.

Description

Fresh air handling unit and control method
Technical Field
The application belongs to the technical field of fresh air equipment, and particularly relates to a fresh air handling unit and a control method.
Background
In the correlation technique, some fresh air handling units have the functions of dehumidification and temperature regulation, and the treatment process is as follows: after the fresh air enters from the air inlet of the fresh air fan unit, the fresh air is firstly subjected to primary cooling and dehumidification through the water meter cooler, then subjected to secondary cooling and dehumidification through the evaporator, then heated through the air-cooled condenser, and finally sent into the room through the air supply fan. In the related application, in order to obtain better temperature regulation effect, the evaporator also provides the refrigerant through the water-cooled condenser, the water-cooled condenser needs water to exchange heat with the refrigerant in the water-cooled condenser to realize the control of the refrigerant, the water used by the water meter cooler is used for primarily cooling and dehumidifying the inlet air, so the water-cooled condenser and the water meter cooler have different requirements on the water temperature, in practical application, the water meter cooler and the water-cooled condenser are supplied with water by different cold water sources respectively, taking water supply of a water-cooled condenser as an example, because the refrigerant in the water-cooled condenser needs to be controlled, the water-cooled condenser provides the required heat exchange water by using a special cooling tower as a cold water source, the cooling tower controls the heat exchange water supplied to the water-cooled condenser, thereby realizing the control of the refrigerant in the water-cooled condenser.
Above-mentioned water gauge cooler and water-cooled condenser both supply water through the condition of different cold water sources respectively, the problem that exists is: the water-cooled condenser and the water meter cooler respectively use different cold water sources for water supply, on one hand, the cost investment is increased, on the other hand, although the water meter cooler independently uses the cold water source for water supply, in the operation process of the fresh air handling unit, the energy consumption of the cooling tower is still very high.
Thus, there is still a need for energy efficiency in fresh air handling units.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides the fresh air handling unit and the control method, so that the heat acquired by the heat exchange between the water cooler and the inlet air is utilized to adjust the heat exchange water of the water-cooled condenser, the energy consumption is reduced, the cost is reduced, and the energy efficiency is improved.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides a fresh air handling unit, includes:
the inlet of the water meter cooler is connected with the outlet of the cold water source;
the water-cooled condenser, the water inlet side of water-cooled condenser is formed with parallelly connected first flow path and second flow path, water-cooled condenser's water inlet passes through first flow path with the exit linkage of water meter cooler, and water-cooled condenser's water inlet still passes through the second flow path with the exit linkage in cold water source.
Further, the fresh air handling unit further comprises:
and the first flow regulating valve is arranged on the inlet side flow path of the water meter cooler and is used for regulating the water flow supplied to the water meter cooler by the cold water source.
Further, the fresh air handling unit further comprises:
and the second flow regulating valve is arranged on the second flow path and used for regulating the water flow of the cold water source directly supplied to the water-cooled condenser.
Further, the fresh air handling unit further comprises:
the evaporator is arranged on the air outlet side of the water meter cooler, and the inlet of the evaporator is connected with the refrigerant outlet of the water-cooled condenser;
and the first throttle valve is arranged on a refrigerant outlet side flow path of the water-cooled condenser.
Further, the fresh air handling unit further comprises:
the air-cooled condenser is arranged on the air outlet side of the evaporator, and the inlet of the evaporator is also connected with the outlet of the air-cooled condenser;
and the second throttle valve is arranged on an outlet side flow path of the air-cooled condenser.
Further, the fresh air handling unit further comprises:
and the outlet of the compressor is respectively connected with the refrigerant inlet of the water-cooled condenser and the inlet of the air-cooled condenser, and the inlet of the compressor is connected with the outlet of the evaporator.
Further, the fresh air handling unit further comprises:
and the fan is used for enabling the fresh air handling unit to form air inlet, and the air inlet sequentially passes through the water cooler, the evaporator and the air-cooled condenser.
Further, the fan is arranged on the air outlet side of the air-cooled condenser.
Further, the fresh air handling unit further comprises:
a check valve disposed on the first flow path.
Further, the fresh air handling unit further comprises:
and the water inlet side of the water-cooled condenser is connected with the first flow path and the second flow path through the water mixing valve.
In a second aspect of the present invention,
the application provides a fresh air handling unit control method, which is applied to the above related fresh air handling unit, and comprises the following steps:
acquiring the inlet air temperature and inlet air humidity of the inlet air side of the fresh air handling unit;
determining whether the inlet air temperature and the inlet air humidity meet the outlet air control requirement;
if the air-out temperature and the air-out humidity of the fresh air handling unit do not meet the air-out control requirement, selectively controlling the water inlet of the water-cooled condenser according to the air-in temperature and the air-in humidity, and respectively controlling the refrigerants supplied to the evaporator by the water-cooled condenser and the air-cooled condenser.
Further, according to the air inlet temperature and the air inlet humidity, the water inlet of the water-cooled condenser is selectively controlled, and the water-cooled condenser and the refrigerant supplied to the evaporator by the air-cooled condenser are respectively controlled, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit meet the air outlet control requirement, and the method comprises the following steps of:
determining whether the first flow regulating valve needs to be opened or not according to the relation between the air inlet temperature and a preset air inlet threshold temperature;
and executing control operation matched with the determination result according to the determination result, and then controlling one or more of the first throttle valve, the second throttle valve and the second flow regulating valve to enable the air outlet temperature and the air outlet humidity of the fresh air handling unit to meet the air outlet control requirement.
Further, according to the relation between the air inlet temperature and the preset air inlet threshold temperature, whether the first flow regulating valve needs to be opened or not is determined, and the method comprises the following steps:
if the inlet air temperature is higher than the preset inlet air threshold temperature, determining that the first flow regulating valve needs to be opened;
and if the inlet air temperature is less than or equal to the preset inlet air threshold temperature, determining that the first flow regulating valve does not need to be opened.
Further, the executing, according to the determination result, a control operation matched with the determination result, and then controlling one or more of the first throttle valve, the second throttle valve, and the second flow rate adjustment valve, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit satisfy the outlet air control requirement, includes:
if it is determined that the first flow regulating valve needs to be opened, opening the first flow regulating valve;
acquiring the superheat degree of the fresh air handling unit, adjusting the opening degrees of the first throttle valve and the second throttle valve according to the inlet air temperature and the inlet air humidity and combining the superheat degree, and acquiring the condensation pressure of the water-cooled condenser;
and judging whether the second flow regulating valve is further opened for common control according to the relation between the condensation pressure and a preset condensation threshold pressure, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit meet the air outlet control requirement.
Further, according to the relation between condensation pressure and the preset condensation threshold pressure, judge whether further open the second flow control valve carries out common control, make fresh air handling unit's air-out temperature and air-out humidity satisfy the air-out control requirement, include:
if the condensation pressure is greater than the preset condensation threshold pressure, the second flow regulating valve is opened, and the first throttle valve, the second throttle valve and the second flow regulating valve are regulated according to the inlet air temperature and the inlet air humidity in combination with the superheat degree and the condensation pressure, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement; or,
if the condensation pressure is smaller than or equal to the preset condensation threshold pressure, the second flow regulating valve is kept closed, and the first throttle valve and the second throttle valve are regulated according to the inlet air temperature and the inlet air humidity and by combining the superheat degree, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement.
Further, the executing, according to the determination result, a control operation matched with the determination result, and then controlling one or more of the first throttle valve, the second throttle valve, and the second flow rate adjustment valve, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit satisfy the outlet air control requirement, includes:
if the first flow regulating valve is determined not to be opened, the first flow regulating valve is kept closed, the second flow regulating valve is opened, and then the first throttle valve and the second throttle valve are regulated according to the inlet air temperature and the inlet air humidity, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement.
Further, the method further comprises:
if the inlet air temperature and the inlet air humidity meet the air outlet control requirement, the fresh air handling unit is controlled to only form inlet air, and the inlet air is not subjected to temperature and humidity control treatment.
In a third aspect,
the application provides a fresh air handling unit, includes:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the related method described above.
This application adopts above technical scheme, possesses following beneficial effect at least:
this application can mix through water meter cooler play water and cold water source play water, offers water cooled condenser to use, realizes utilizing water meter cooler and the heat that the air inlet heat exchange acquireed to adjust the heat exchange water that obtains water cooled condenser, and then can realize reaching and replace the cooling tower to the water cooled condenser effect of adjusting that supplies water, helps realizing that the singly cold water source supplies water to help reduce cost, reduce the energy consumption, promote the efficiency.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fresh air handling unit according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a control method for a fresh air handling unit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a fresh air handling unit according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a fresh air handling unit according to an embodiment of the present application, and as shown in fig. 1, the fresh air handling unit 1 includes:
an inlet of the water meter cooler 101 is connected with an outlet of the cold water source 2;
water cooled condenser 102, water cooled condenser 102's water inlet side is formed with parallelly connected first flow path and second flow path, water cooled condenser 102's water inlet passes through first flow path with the exit linkage of water surface cooler 101, and water cooled condenser 102's water inlet still passes through the second flow path with the exit linkage of cold water source 2.
Specifically, through the scheme of the embodiment, water can be supplied through the single cold water source 2, so that the respective water inlet requirements of the water cooler 101 and the water-cooled condenser 102 are met, and meanwhile, the energy consumption is reduced and the energy efficiency is improved. The cold water source 2 supplies water to the water meter cooler 101, after the water supplied from the cold water source 2 enters the water meter cooler 101, the water meter cooler 101 can perform preliminary cooling and dehumidification on inlet air, heat in the inlet air is absorbed, and the water from the water meter cooler 101 is mixed with the water directly supplied to the water-cooled condenser 102 from the cold water source 2 and is supplied to the water-cooled condenser 102. The water discharged from the water meter cooler 101 is mixed with the water discharged from the cold water source 2 and is supplied to the water-cooled condenser 102 for use, so that the heat obtained by the heat exchange between the water meter cooler 101 and the intake air is used for adjusting the heat exchange water of the water-cooled condenser 102, and the effect of replacing a cooling tower to adjust the water supply of the water-cooled condenser 102 can be achieved, and therefore, the water supply of the single cold water source 2 can be achieved through the scheme of the embodiment, the cost is reduced, the energy consumption is reduced, and the energy efficiency is improved.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
and the first flow regulating valve 103 is arranged on the inlet side flow path of the water meter cooler 101 and is used for regulating the water flow supplied to the water meter cooler 101 by the cold water source 2.
Specifically, the on-off of the first flow regulating valve 103 is controlled, and whether precooling and dehumidification of inlet air are needed can be controlled.
And a second flow rate regulating valve 104 disposed on the second flow path for regulating a flow rate of water directly supplied from the cold water source 2 to the water-cooled condenser 102.
Specifically, when the first flow rate adjustment valve 103 and the second flow rate adjustment valve 104 are both open, the water entering the water inlet of the water-cooled condenser 102 is a mixture of the water exiting from both the first flow path and the second flow path, wherein, the water from the first flow path is discharged from the water meter cooler 101, the water from the second flow path is directly provided by the cold water source 2, after the water from the cold water source 2 enters the water meter cooler 101, the water meter cooler 101 can carry out primary cooling and dehumidification on the inlet air, absorb the heat in the air, therefore, after the water from the first flow path and the water from the second flow path are mixed, the water is regulated, for example, the cold water source 2 can be underground water with stable low temperature, the heat obtained by the heat exchange between the water cooler 101 and the inlet air is used for regulating the heat exchange water of the water-cooled condenser 102, further, the water supply regulation effect of the water-cooled condenser 102 can be achieved instead of the cooling tower.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
a check valve 105 disposed on the first flow path.
Specifically, a check valve 105 is provided in the first flow path to prevent water from flowing backward from the water outlet of the water cooler 101.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
and a mixing valve 106, wherein the water inlet side of the water-cooled condenser 102 is connected with the first flow path and the second flow path through the mixing valve 106.
Specifically, water flowing out of the water outlet of the water meter cooler 101 enters the water mixing valve 106 through the first flow path, and part of water supplied from the cold water source 2 enters the water mixing valve 106 through the second flow path, and the water coming out of the water mixing valve 106 is a mixture of two paths of water, so that the water is regulated and then is supplied to the water-cooled condenser 102 for heat exchange.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
the evaporator 107 is arranged on the air outlet side of the water meter cooler 101, and an inlet of the evaporator 107 is connected with a refrigerant outlet of the water-cooled condenser 102;
the first throttle valve 110 is disposed on the refrigerant outlet side flow path of the water-cooled condenser 102.
Specifically, the water-cooled condenser 102 and the evaporator 107 form a refrigerant flow path, the evaporator 107 is disposed on the air outlet side of the water cooler 101, after the air passes through the water cooler 101, the air passes through the evaporator 107, and the evaporator 107 performs secondary cooling and dehumidification on the passing air, the outgoing air is dry and cold air, and the refrigerant supplied to the evaporator 107 by the water-cooled condenser 102 can be adjusted and controlled through the first throttle valve 110.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
the air-cooled condenser 108 is arranged on the air outlet side of the evaporator 107, and the inlet of the evaporator 107 is also connected with the outlet of the air-cooled condenser 108;
and a second throttle valve 111 provided in an outlet-side flow path of the air-cooled condenser 108.
Specifically, the evaporator 107 and the air-cooled condenser 108 form a refrigerant flow path, the evaporator 107 is used for receiving the refrigerant of the air-cooled condenser 108, and an additional evaporator 107 is not required to be separately arranged for the air-cooled condenser 108. The air-cooled condenser 108 is provided on the air outlet side of the evaporator 107, and the air passes through the evaporator 107 to form dry and cool air, the temperature of which is further lowered, and the dry and cool air is heated by heat released by condensation performed by the air-cooled condenser 108 in the air-cooled condenser 108, and the heated dry air is supplied to the room. The refrigerant supplied from the air-cooled condenser 108 to the evaporator 107 can be controlled by the second throttle valve 111.
In practical applications, the degree of contribution of both the water-cooled condenser 102 and the air-cooled condenser 108 to cooling and dehumidifying of the evaporator 107 can be adjusted by the cooperation of the first throttle valve 110 and the second throttle valve 111.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
and an outlet of the compressor 109 is connected to a refrigerant inlet of the water-cooled condenser 102 and an inlet of the air-cooled condenser 108, respectively, and an inlet of the compressor 109 is connected to an outlet of the evaporator 107.
Specifically, the water-cooled condenser 102 and the air-cooled condenser 108 form a parallel refrigerant flow path, the refrigerant supplied by the compressor 109 is divided into two parts, one part of the refrigerant enters the water-cooled condenser 102 to exchange heat with water and then enters the evaporator 107, the other part of the refrigerant enters the air-cooled condenser 108 to exchange heat with passing air, the passing air is heated and then enters the evaporator 107, the refrigerant entering the evaporator 107 comes from two places, and the dehumidification capacity is enhanced.
As shown in fig. 1, in an embodiment, the fresh air handling unit 1 further includes:
and the fan 112 is used for enabling the fresh air handling unit 1 to form air inlet, and sequentially passes through the water cooler 101, the evaporator 107 and the air-cooled condenser 108.
Further, the fan 112 is disposed on the air outlet side of the air-cooled condenser 108.
Specifically, as shown in fig. 1, an arrow shown in fig. 1 indicates an air inlet direction, and the air blower 112 can form inlet air for outdoor air, so that the inlet air is sequentially cooled and dehumidified by the water meter cooler 101 and the evaporator 107 to obtain dry and cold air, and is heated by the air-cooled condenser 108 to obtain dry air with increased temperature, and then the dry air is sent into a room to meet the dehumidification and temperature adjustment requirements of users.
Through the above description of each hardware of the fresh air handling unit 1, it can be known that energy efficiency can be improved by supplying water from the single-cold water source 2 and adjusting the heat exchange water of the water-cooled condenser 102 by using the heat obtained by the heat exchange between the water cooler 101 and the intake air. Corresponding to how to obtain better energy efficiency improvement effect by using the single cold water source 2, the application also provides a control method applied to the related fresh air handling unit 1.
As shown in fig. 2, fig. 2 is a schematic flow chart of a fresh air handling unit control method according to an embodiment of the present application, where the fresh air handling unit control method includes the following steps:
and S201, acquiring the air inlet temperature and the air inlet humidity of the air inlet side of the fresh air handling unit 1.
Specifically, a temperature sensor and a humidity sensor can be arranged at an air inlet on the air inlet side of the fresh air handling unit 1 to detect and acquire the inlet air temperature and the inlet air humidity.
And S202, determining whether the inlet air temperature and the inlet air humidity meet the air outlet control requirement.
Specifically, in one embodiment, for example, the air outlet control requirement may be: t isSO-a≤T≤TSO+ a, and D is less than or equal to DSOWherein T represents temperature, TSOIndicating the target temperature of the air supply, a indicating the allowable temperature deviation, D indicating the humidity, DSOIndicating the target supply air humidity.
For example, the inlet air temperature is TxThe inlet air humidity is DxIn the actual environment, if TSO-a≤Tx≤TSO+ a, and Dx≤DSOThe temperature and the humidity of the outdoor environment directly meet the air outlet control requirement of the fresh air machine, and the air inlet does not need to be cooled, dehumidified and temperature-improved. And when one of the temperature and the humidity in the air outlet control requirement cannot reach the target condition, namely the air outlet control requirement is not met, the air inlet needs to be cooled, dehumidified and temperature-raised for control.
Step S203, if the air temperature and the air humidity are not satisfied, selectively controlling the water inlet of the water-cooled condenser 102 and respectively controlling the refrigerant supplied to the evaporator 107 by the water-cooled condenser 102 and the air-cooled condenser 108 according to the air inlet temperature and the air inlet humidity, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit 1 satisfy the air outlet control requirement.
Specifically, the water inlet of the water-cooled condenser 102 is selectively controlled, and the water may be supplied to the water-cooled condenser 102 through the first flow path only by the water cooler 101, or the water may be supplied to the water-cooled condenser 102 through the second flow path only by the cold water source 2, or the two water supplies may be performed simultaneously, and the water is mixed and then supplied to the water-cooled condenser 102. The three water supply conditions can be determined according to the specific conditions of the temperature and the humidity of the inlet air, which will be described in detail below.
In one embodiment, the selectively controlling the water inlet of the water-cooled condenser 102 and respectively controlling the water-cooled condenser 102 and the air-cooled condenser 108 to supply the refrigerant to the evaporator 107 according to the air inlet temperature and the air inlet humidity so that the air outlet temperature and the air outlet humidity of the fresh air handling unit 1 meet the air outlet control requirement includes:
determining whether the first flow regulating valve 103 needs to be opened or not according to the relation between the inlet air temperature and a preset inlet air threshold temperature;
according to the determination result, a control operation matched with the determination result is executed, and then one or more of the first throttle valve 110, the second throttle valve 111 and the second flow regulating valve 104 are controlled, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
Specifically, in the initial state, the first flow regulating valve 103, the second flow regulating valve 104, the first throttle valve 110, and the second throttle valve 111 are all in the unopened state, and after it is determined whether the intake air temperature and the intake air humidity meet the air-out control requirement, the corresponding control is performed.
And determining whether the first flow regulating valve 103 needs to be opened or not, wherein the purpose is to determine whether precooling and dehumidification are needed to be carried out on the inlet air or not, if the first flow regulating valve 103 needs to be opened, the requirement of precooling and dehumidification on the inlet air is indicated, and if the first flow regulating valve 103 does not need to be opened, the requirement of precooling and dehumidification on the inlet air is indicated.
For example, the preset inlet air threshold temperature is TxaWhen the temperature of the inlet air isTx＞TxaWhen it is determined that the first flow rate regulation valve 103 needs to be opened, and when T isx≤TxaIt is determined that the first flow rate regulation valve 103 does not need to be opened. According to the determination result, the control operation matched with the determination result is executed, and the control operation can be: when the temperature of the inlet air is Tx＞TxaWhen T is reached, the opening of the first flow regulating valve 103 is performed, and when T is reachedx≤TxaAt this time, the first flow rate adjustment valve 103 is kept closed, and the second flow rate adjustment valve 104 is opened.
Then, on the basis that the first flow regulating valve 103 is opened or not opened, one or more of the first throttle valve 110, the second throttle valve 111 and the second flow regulating valve 104 are controlled, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
In one embodiment, the executing, according to the determination result, a control operation matched with the determination result, and then controlling one or more of the first throttle valve 110, the second throttle valve 111, and the second flow rate adjustment valve 104 to make the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement includes:
if it is determined that the first flow rate adjustment valve 103 needs to be opened, opening the first flow rate adjustment valve 103;
acquiring the superheat degree of the fresh air handling unit 1, adjusting the opening degrees of the first throttle valve 110 and the second throttle valve 111 according to the inlet air temperature and the inlet air humidity in combination with the superheat degree, and acquiring the condensation pressure of the water-cooled condenser 102;
and judging whether the second flow regulating valve 104 is further opened for common control according to the relation between the condensation pressure and a preset condensation threshold pressure, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit 1 meet the air outlet control requirement.
Specifically, when the temperature of the inlet air is Tx＞TxaWhen the temperature of inlet air is high, the inlet air needs to be pre-cooled and dehumidified, and after the first flow regulating valve 103 is opened, the cold water source 2 flows to the water cooler 101Supplying water, water that cold water source 2 supplied out gets into water surface cooler 101 after, can make water surface cooler 101 carry out preliminary cooling dehumidification to the air inlet, absorbed the heat in the air inlet, the water that comes out from water surface cooler 101 gets into water cooled condenser 102, with the refrigerant heat transfer in the water cooled condenser 102, in heat transfer process, for guaranteeing the unit performance, the reliability, acquire fresh air unit 1's superheat degree, according to air inlet temperature and air inlet humidity, combine the superheat degree, adjust the aperture of first choke valve 110 and second choke valve 111, the realization is to the air supply temperature, the regulation of air supply humidity and unit superheat degree. In the adjusting process of the opening degrees of the first throttle valve 110 and the second throttle valve 111, the condensing pressure of the water-cooled condenser 102 is obtained at the same time, whether the condensing pressure of the water-cooled condenser 102 is higher or not is monitored, and whether the second flow regulating valve 104 is further opened or not is judged to carry out common control, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit 1 meet the air outlet control requirement.
In one embodiment, the determining whether to further open the second flow rate adjustment valve 104 for common control according to the relationship between the condensation pressure and a preset condensation threshold pressure so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement includes:
if the condensation pressure is greater than the preset condensation threshold pressure, the second flow regulating valve 104 is opened, and the first throttle valve 110, the second throttle valve 111 and the second flow regulating valve 104 are regulated according to the inlet air temperature and the inlet air humidity in combination with the superheat degree and the condensation pressure, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
Specifically, if the condensing pressure is greater than the preset condensing threshold pressure, it indicates that the condensing pressure of the water-cooled condenser 102 is relatively high, and in order to ensure the performance and reliability of the unit, the condensing pressure reduction control needs to be performed simultaneously, in this case, the second flow regulating valve 104 is opened, so that the water coming out of the water meter cooler 101 is mixed with the water directly supplied by the cold water source 2, the water supplied to the water-cooled condenser 102 is adjusted, the water flow rate can be increased, the cooling water temperature can be reduced, the condensing pressure is reduced, and the first throttle valve 110, the second throttle valve 111 and the second flow regulating valve 104 are adjusted according to the inlet air temperature and the inlet air humidity in combination with the superheat degree and the condensing pressure, so that the outlet air temperature and the outlet air humidity of the fresh air unit 1 meet the outlet control.
Or, if the condensation pressure is less than or equal to the preset condensation threshold pressure, the second flow rate adjustment valve 104 is kept closed, and the first throttle valve 110 and the second throttle valve 111 are adjusted according to the inlet air temperature and the inlet air humidity in combination with the superheat degree, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
Specifically, if the condensing pressure is less than or equal to the preset condensing threshold pressure, it indicates that the condensing pressure of the water-cooled condenser 102 is normal, and in this case, the second flow regulating valve 104 does not need to be opened, and only the first throttle valve 110 and the second throttle valve 111 need to be adjusted according to the inlet air temperature and the inlet air humidity in combination with the superheat degree, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
In one embodiment, the executing, according to the determination result, a control operation matched with the determination result, and then controlling one or more of the first throttle valve 110, the second throttle valve 111, and the second flow rate adjustment valve 104 to make the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement includes:
if it is determined that the first flow regulating valve 103 does not need to be opened, the first flow regulating valve 103 is kept closed, the second flow regulating valve 104 is opened, and then the first throttle valve 110 and the second throttle valve 111 are adjusted according to the inlet air temperature and the inlet air humidity, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
Specifically, when T isx≤TxaIn this case, the first flow control valve 103 is kept closed and the second flow control valve 104 is opened, and water is directly treated only by the cold water source 2The condenser 102 supplies water, and then adjusts the first throttle valve 110 and the second throttle valve 111 according to the inlet air temperature and the inlet air humidity, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit 1 meet the outlet air control requirement.
In one embodiment, the method further comprises:
if the inlet air temperature and the inlet air humidity meet the air outlet control requirement, the fresh air handling unit is controlled to only form inlet air, and the inlet air is not subjected to temperature and humidity control treatment.
Specifically, if the inlet air temperature and the inlet air humidity satisfy the air-out control requirement, then explain can directly utilize outdoor air, need not dehumidify it and the control that adjusts the temperature, under this situation, fresh air handling unit 1 only need open fan 112 can, fresh air handling unit 1's refrigerating system need not operate, water meter cooler 101 also need not supply water, only through fan 112 with outdoor air formation air inlet send into indoor can.
Fig. 3 is a schematic structural diagram of a fresh air handling unit according to another embodiment of the present application, and as shown in fig. 3, the fresh air handling unit 1 includes:
a memory 301 having an executable program stored thereon;
a processor 302 for executing the executable program in the memory 301 to implement the steps of the related method described above.
With regard to the fresh air handling unit 1 in the above-described embodiment, the specific manner in which the processor 302 executes the program in the memory 301 has been described in detail in the embodiment related to the method, and will not be described in detail here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Further, "connected" as used herein may include wirelessly connected. The term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (18)

1. A fresh air handling unit, comprising:
the inlet of the water meter cooler is connected with the outlet of the cold water source;
the water-cooled condenser, the water inlet side of water-cooled condenser is formed with parallelly connected first flow path and second flow path, water-cooled condenser's water inlet passes through first flow path with the exit linkage of water meter cooler, and water-cooled condenser's water inlet still passes through the second flow path with the exit linkage in cold water source.
2. The fresh air handling unit of claim 1, further comprising:
and the first flow regulating valve is arranged on the inlet side flow path of the water meter cooler and is used for regulating the water flow supplied to the water meter cooler by the cold water source.
3. The fresh air handling unit of claim 2, further comprising:
and the second flow regulating valve is arranged on the second flow path and used for regulating the water flow of the cold water source directly supplied to the water-cooled condenser.
4. The fresh air handling unit of claim 3, further comprising:
the evaporator is arranged on the air outlet side of the water meter cooler, and the inlet of the evaporator is connected with the refrigerant outlet of the water-cooled condenser;
and the first throttle valve is arranged on a refrigerant outlet side flow path of the water-cooled condenser.
5. The fresh air handling unit of claim 4, further comprising:
the air-cooled condenser is arranged on the air outlet side of the evaporator, and the inlet of the evaporator is also connected with the outlet of the air-cooled condenser;
and the second throttle valve is arranged on an outlet side flow path of the air-cooled condenser.
6. The fresh air handling unit of claim 5, further comprising:
and the outlet of the compressor is respectively connected with the refrigerant inlet of the water-cooled condenser and the inlet of the air-cooled condenser, and the inlet of the compressor is connected with the outlet of the evaporator.
7. The fresh air handling unit according to claim 5 or 6, further comprising:
and the fan is used for enabling the fresh air handling unit to form air inlet, and the air inlet sequentially passes through the water cooler, the evaporator and the air-cooled condenser.
8. The fresh air handling unit of claim 7, wherein the fan is disposed on an air outlet side of the air-cooled condenser.
9. The fresh air handling unit of claim 1, further comprising:
a check valve disposed on the first flow path.
10. The fresh air handling unit of claim 1, further comprising:
and the water inlet side of the water-cooled condenser is connected with the first flow path and the second flow path through the water mixing valve.
11. A fresh air handling unit control method for use with a fresh air handling unit as claimed in any of claims 5 to 8, the method comprising:
acquiring the inlet air temperature and inlet air humidity of the inlet air side of the fresh air handling unit;
determining whether the inlet air temperature and the inlet air humidity meet the outlet air control requirement;
if the air-out temperature and the air-out humidity of the fresh air handling unit do not meet the air-out control requirement, selectively controlling the water inlet of the water-cooled condenser according to the air-in temperature and the air-in humidity, and respectively controlling the refrigerants supplied to the evaporator by the water-cooled condenser and the air-cooled condenser.
12. The method according to claim 11, wherein the selectively controlling the water intake of the water-cooled condenser and the controlling the refrigerants supplied to the evaporator by the water-cooled condenser and the air-cooled condenser respectively according to the air intake temperature and the air intake humidity so that the air outlet temperature and the air outlet humidity of the fresh air handling unit satisfy the air outlet control requirement comprises:
determining whether the first flow regulating valve needs to be opened or not according to the relation between the air inlet temperature and a preset air inlet threshold temperature;
and executing control operation matched with the determination result according to the determination result, and then controlling one or more of the first throttle valve, the second throttle valve and the second flow regulating valve to enable the air outlet temperature and the air outlet humidity of the fresh air handling unit to meet the air outlet control requirement.
13. The method of claim 12, wherein determining whether the first flow regulator valve needs to be opened based on a relationship between the intake air temperature and a preset intake air threshold temperature comprises:
if the inlet air temperature is higher than the preset inlet air threshold temperature, determining that the first flow regulating valve needs to be opened;
and if the inlet air temperature is less than or equal to the preset inlet air threshold temperature, determining that the first flow regulating valve does not need to be opened.
14. The method according to claim 12 or 13, wherein the performing a control operation matched with the determination result and then controlling one or more of the first throttle valve, the second throttle valve and the second flow regulating valve to make the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement comprises:
if it is determined that the first flow regulating valve needs to be opened, opening the first flow regulating valve;
acquiring the superheat degree of the fresh air handling unit, adjusting the opening degrees of the first throttle valve and the second throttle valve according to the inlet air temperature and the inlet air humidity and combining the superheat degree, and acquiring the condensation pressure of the water-cooled condenser;
and judging whether the second flow regulating valve is further opened for common control according to the relation between the condensation pressure and a preset condensation threshold pressure, so that the air outlet temperature and the air outlet humidity of the fresh air handling unit meet the air outlet control requirement.
15. The method according to claim 14, wherein the determining whether to further open the second flow regulating valve for common control according to the relationship between the condensing pressure and a preset condensing threshold pressure so that the outlet air temperature and the outlet air humidity of the fresh air handling unit satisfy the outlet air control requirement comprises:
if the condensation pressure is greater than the preset condensation threshold pressure, the second flow regulating valve is opened, and the first throttle valve, the second throttle valve and the second flow regulating valve are regulated according to the inlet air temperature and the inlet air humidity in combination with the superheat degree and the condensation pressure, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement; or,
if the condensation pressure is smaller than or equal to the preset condensation threshold pressure, the second flow regulating valve is kept closed, and the first throttle valve and the second throttle valve are regulated according to the inlet air temperature and the inlet air humidity and by combining the superheat degree, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement.
16. The method according to claim 12 or 13, wherein the performing a control operation matched with the determination result and then controlling one or more of the first throttle valve, the second throttle valve and the second flow regulating valve to make the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement comprises:
if the first flow regulating valve is determined not to be opened, the first flow regulating valve is kept closed, the second flow regulating valve is opened, and then the first throttle valve and the second throttle valve are regulated according to the inlet air temperature and the inlet air humidity, so that the outlet air temperature and the outlet air humidity of the fresh air handling unit meet the outlet air control requirement.
17. The method of claim 11, further comprising:
if the inlet air temperature and the inlet air humidity meet the air outlet control requirement, the fresh air handling unit is controlled to only form inlet air, and the inlet air is not subjected to temperature and humidity control treatment.
18. A fresh air handling unit, comprising:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the method of any of claims 11-17.
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