CN110608500B - Adjustable fresh air machine and control method thereof - Google Patents
Adjustable fresh air machine and control method thereof Download PDFInfo
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- CN110608500B CN110608500B CN201910995266.7A CN201910995266A CN110608500B CN 110608500 B CN110608500 B CN 110608500B CN 201910995266 A CN201910995266 A CN 201910995266A CN 110608500 B CN110608500 B CN 110608500B
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000007613 environmental effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- 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
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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
- 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
-
- 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
- F24F13/02—Ducting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/70—Carbon dioxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
- Ventilation (AREA)
Abstract
The invention discloses an adjustable fresh air machine and a control method thereof, wherein the adjustable fresh air machine comprises: a fresh air duct, a fresh air bypass duct, a return air duct and a return air bypass duct are formed in the shell; the heat exchange core body is communicated with the fresh air channel and the return air channel and is independently arranged outside the fresh air bypass channel and the return air bypass channel; and the air valve assembly is adjusted to switch the on-off states of all air channels in the shell. The control method includes a temperature control method and/or a humidity control method. The invention has various operation modes, has simple and practical structure, and realizes the temperature and humidity control of the air outlet under the condition of passive cold source through the non-auxiliary heat adjustable heat recovery control.
Description
Technical Field
The invention relates to the technical field of fresh air machines, in particular to an adjustable fresh air machine and a control method thereof.
Background
The fresh air ventilator is also called a fresh air ventilator and is widely applied to various places, but the current fresh air ventilator is relatively fixed in air duct, and the on-off state cannot be flexibly switched, the flow direction of the air duct in the fresh air ventilator is changed, so that the running mode is less, the working state cannot be adjusted according to the actual working condition, and the problems of energy waste, poor comfortableness and the like are caused. In addition, no fresh air machine which can accurately adjust the temperature and humidity of the air outlet of the fresh air unit only based on the passive cold source heat recovery device exists in the prior art, a temperature and humidity adjusting mode of the fresh air machine is generally to add a cold and hot coil module and an dehumidifying module at present, a main machine refrigerant loop and a waterway are additionally added, and the scheme is complex in engineering and high in operation and maintenance cost.
Therefore, how to design an adjustable fresh air machine capable of flexibly changing the flow direction of an air duct in the fresh air machine and a control method thereof are technical problems to be solved in the industry.
Disclosure of Invention
In order to solve the defects of few running modes and poor comfort of the existing fresh air fan, the invention provides an adjustable fresh air fan capable of flexibly changing the flow direction of an air channel in the fresh air fan and a control method thereof.
The invention adopts the technical scheme that the design of the adjustable fresh air machine comprises the following steps: a fresh air duct, a fresh air bypass duct, a return air duct and a return air bypass duct are formed in the shell; the heat exchange core body is communicated with the fresh air channel and the return air channel and is independently arranged outside the fresh air bypass channel and the return air bypass channel; and the air valve assembly is adjusted to switch the on-off states of all air channels in the shell.
Preferably, an air supply cavity provided with an air supply port, a fresh air cavity provided with a fresh air port, a return air cavity provided with a return air port and an exhaust cavity provided with an exhaust port are formed in the shell; the fresh air channel and the fresh air bypass channel are connected in parallel between the air supply cavity and the fresh air cavity, the return air channel and the return air bypass channel are connected in parallel between the return air cavity and the air exhaust cavity, a mixing air port is arranged between the fresh air cavity and the air exhaust cavity, and all air ports are provided with air valves for adjusting the opening degree.
Preferably, the exhaust cavity is internally provided with an exhaust fan with an air outlet opposite to the air outlet, the air supply cavity is movably provided with an air feeder, and the air outlet of the air feeder can rotate to be opposite to the air supply outlet or towards the air supply cavity.
Preferably, when the fresh air fan is in the heat exchange mode, the fresh air channel and the return air channel are all communicated, the fresh air bypass channel, the return air bypass channel and the air mixing port are all closed, the air supply port, the fresh air port, the return air port and the air outlet are all opened, and the exhaust fan and the air feeder are all opened.
Preferably, when the fresh air fan is in the fresh air supply mode, the fresh air bypass air duct, the air supply opening and the fresh air opening are opened, the fresh air duct, the return air bypass air duct, the air mixing opening, the return air opening and the air outlet are closed, the exhaust fan is stopped, and the air feeder is started.
Preferably, when the fresh air fan is in the double bypass mode, the fresh air bypass air channel and the return air bypass air channel are all communicated, the fresh air channel, the return air channel and the air mixing port are all closed, the air supply port, the fresh air port, the return air port and the air outlet are all opened, and the exhaust fan and the air feeder are all opened.
Preferably, when the fresh air fan is in the internal circulation mode, the fresh air bypass air duct and the return air bypass air duct are all communicated, the fresh air duct, the return air duct, the fresh air port and the air outlet are all closed, the air supply port, the return air port and the air mixing port are all opened, the exhaust fan is stopped, and the air feeder is started.
Preferably, when the fresh air fan is in the circulating heat exchange mode, the fresh air channel, the fresh air bypass channel, the return air inlet and the air outlet are all opened, the return air bypass channel, the air supply inlet, the fresh air inlet and the air mixing inlet are all closed, the air outlet of the air feeder rotates to face the air supply cavity, and the air feeder and the air exhauster are all opened.
The invention also provides a control method of the adjustable fresh air machine, which comprises a temperature control method and/or a humidity control method.
The temperature control method comprises the following steps: detecting the temperature Tx of the fresh air inlet and the temperature Th of the return air inlet in real time; judging whether the absolute Tx-Th is less than or equal to a first preset value TA, if so, controlling the operation mode of the new fan according to the indoor air quality, otherwise, controlling the operation mode of the new fan according to the operation temperature parameter of the new fan and the indoor air quality.
The humidity control method comprises the following steps: detecting the humidity Hx of the fresh air inlet and the humidity Hh of the return air inlet in real time; judging whether the I Hx-Hh I is less than or equal to a first preset value HA, if yes, controlling the operation mode of the new fan according to the indoor air quality, otherwise, controlling the operation mode of the new fan according to the operation humidity parameter of the new fan and the indoor air quality.
Preferably, the indoor air quality is obtained by detecting the indoor CO2 concentration and comparing it with a preset concentration value P.
Preferably, the method for controlling the fresh air fan to enter the fresh air supply mode or the double bypass mode according to the air quality comprises the following steps: judging whether the indoor CO2 concentration is less than or equal to P, if so, entering a fresh air supply mode by the fresh air fan, otherwise, entering a double bypass mode by the fresh air fan.
Preferably, the new fan operating temperature parameters include: setting a fresh air port temperature Tx, an air supply port temperature Ts and a fresh air fan target temperature T; controlling the fresh air fan to enter an internal circulation mode or a circulation heat exchange mode or a heat exchange mode according to the fresh air fan operation temperature parameter and the indoor air quality, wherein the method comprises the following steps:
a.1, judging whether Tx is more than or equal to a preset outdoor temperature TD, if yes, executing a step a.2, otherwise, executing a step a.3;
step a.2, judging whether the |Ts-T is set to be equal to or larger than a second preset value TB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
and a step a.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, and otherwise, entering a circulation heat exchange mode.
Preferably, when the fresh air machine is used in summer, the T is more than or equal to the indoor environment temperature T; when the fresh air machine is used in winter, the temperature T of the fresh air machine is less than or equal to the indoor environment temperature T.
Preferably, the fresh air machine operation humidity parameter includes: setting fresh air port humidity Hx, air supply port humidity Hs and fresh air fan target humidity H; controlling the fresh air fan to enter an internal circulation mode or a circulation heat exchange mode or a heat exchange mode according to the running humidity parameter of the fresh air fan and the indoor air quality, wherein the method comprises the following steps:
b.1, judging whether Hx is more than or equal to preset outdoor humidity HD, if so, executing the step b.2, otherwise, executing the step b.3;
b.2, judging whether the I Hs-H is larger than or equal to a second preset value HB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
and b.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, and otherwise, entering a circulation heat exchange mode.
Preferably, when the fresh air machine is used in summer, H is set to be more than or equal to indoor environment humidity H; when the fresh air machine is used in winter, the indoor environment humidity H is less than or equal to H.
Preferably, after the fresh air fan is started and runs for a preset time m in a heat exchange mode, the temperature control method and/or the humidity control method are executed.
Compared with the prior art, the invention has the following advantages:
1. by arranging the bidirectional bypass air duct and the adjusting air valve assembly, the flow direction of the air duct in the shell can be flexibly switched, and the air duct has multiple operation modes;
2. the traditional fixed fan is designed into a rotary fan, and the direction of the air channel in the shell can be changed by rotating the fan, so that the structure is simple and practical;
3. and the temperature and humidity control of the air outlet under the condition of a passive cold source is realized through the non-auxiliary heat adjustable heat recovery control.
Drawings
The invention is described in detail below with reference to examples and figures, wherein:
FIG. 1 is a schematic diagram of an adjustable fresh air machine according to the present invention;
FIG. 2 is a schematic diagram of the airflow in the heat exchange mode of the present invention;
FIG. 3 is a schematic airflow diagram of the fresh air supply mode according to the present invention;
FIG. 4 is a schematic flow diagram of the dual bypass mode of the present invention;
FIG. 5 is a schematic view of the gas flow in the internal circulation mode of the present invention;
FIG. 6 is a schematic diagram of the flow of gas in the cyclic heat exchange mode of the present invention;
FIG. 7 is a schematic flow chart of a temperature control method in the invention.
Detailed Description
As shown in fig. 1 to 6, the adjustable fresh air machine provided by the present invention includes: a housing 1, a heat exchange core 2 and a damper assembly.
A fresh air channel, a fresh air bypass channel, a return air channel and a return air bypass channel are formed in the shell 1, and an air supply cavity 4 provided with an air supply port 3, a fresh air cavity 6 provided with a fresh air port 5, a return air cavity 8 provided with a return air port 7 and an exhaust cavity 10 provided with an exhaust port 9 are formed in the shell; the fresh air channel and the fresh air bypass channel are connected in parallel between the air supply cavity 4 and the fresh air cavity 6, the return air channel and the return air bypass channel are connected in parallel between the return air cavity 8 and the air exhaust cavity 10, a mixing air port 11 is arranged between the fresh air cavity 6 and the air exhaust cavity 10, all air ports are provided with air valves for adjusting the opening degree, more specifically, the air supply port 3 is provided with an air supply air valve, the fresh air port 5 is provided with a fresh air valve, the return air port 7 is provided with a return air valve, the air outlet 9 is provided with an air exhaust air valve, and the mixing air port is provided with a proportion adjusting air valve.
In the preferred embodiment, casing 1 divide into two-layer, and fresh air wind channel and fresh air bypass wind channel locate one of them layer side by side, and return air wind channel and return air bypass wind channel are located another layer side by side, and four wind channels are parallel to each other, and the one end in fresh air wind channel and the one end intercommunication in fresh air bypass wind channel form air supply chamber 4, the other end in fresh air wind channel with the other end intercommunication in fresh air bypass wind channel forms fresh air chamber 6, the one end intercommunication in return air wind channel and the one end intercommunication in return air bypass wind channel form return air chamber 8, the other end in return air wind channel and the other end intercommunication in return air bypass wind channel form exhaust chamber 10, are equipped with two sides that the position is relative on the casing 1, and supply air port 3 and return air inlet 7 are located one of them side, and fresh air port 5 and air exit 10 are located wherein on the other side.
The heat exchange core body 2 is communicated with the fresh air channel and the return air channel, specifically, one part of the heat exchange core body 2 is positioned in the fresh air channel, the other part of the heat exchange core body 2 is positioned in the return air channel, and the heat exchange core body 2 and the return air bypass channel are separated by the partition plate, so that the heat exchange core body 2 is independently arranged outside the fresh air bypass channel and the return air bypass channel.
The air valve adjusting component can switch the on-off states of all air channels in the shell 1, the air valve adjusting component comprises a plurality of air valve adjusting components, the air valve adjusting component is not limited in structure, can be of a movable door structure adopting rack transmission, can also be of an inflatable air bag door structure, or can be of other common air valve structures, can switch the on-off states of corresponding air channels, can switch the on-off states of two air channels by using the same movable door when the structure allows, and is optimally provided with one air valve adjusting component for each air channel, so that the opening of each air channel is independently controlled.
Further, an exhaust fan 12 with an air outlet facing the air outlet is arranged in the exhaust cavity 10, and the exhaust fan 12 is fixedly arranged in the exhaust cavity 10. The air feeder 13 is movably arranged in the air feeding cavity 4, the air outlet of the air feeder 13 can rotate to be opposite to the air feeding opening 3 or towards the air feeding cavity 4, the rotation of the air feeder 13 is driven by a gear mechanism, and the gear mechanism comprises: the driven wheel fixed on the blower 13, and a driving wheel meshed with the driven wheel, wherein the driving wheel is driven to rotate by the electric piece, and the blower 13 is driven by the driven wheel to rotate along with the driven wheel. In the preferred embodiment, the casing 1 is square, the initial state of the air outlet of the blower 13 is opposite to the air outlet 3, the position of the air outlet 3 is on the same straight line with the fresh air channel, the fresh air bypass channel is located on one side of the fresh air channel, and the air outlet faces the side face of the casing 1 where the fresh air bypass channel is located after the blower 13 rotates 90 degrees, so that the air flows along the side face and the fresh air bypass channel towards the fresh air inlet 5.
The fresh air machine of the invention has a plurality of operation modes, and the following detailed description is given by using preferred embodiments only.
As shown in fig. 2, when the fresh air fan is in the heat exchange mode, the fresh air duct and the return air duct are all connected, the fresh air bypass duct, the return air bypass duct and the air mixing port 11 are all closed, the air supply port 3, the fresh air port 5, the return air port 7 and the air outlet 9 are all opened, the air exhauster 12 and the air blower 13 are all opened, in this mode, indoor return air enters the return air duct from the return air port 7, outdoor fresh air enters the fresh air duct from the fresh air port 5, two airflows exchange heat through the heat exchange core, one part of the airflows are exhausted outdoors along the return air duct to the air outlet 9, and the other part of the airflows are fed indoors along the fresh air duct to the air supply port 3.
As shown in fig. 3, when the fresh air fan is in the fresh air supply mode, the fresh air bypass duct, the air supply port 3 and the fresh air port 5 are opened, the fresh air duct, the return air bypass duct, the air mixing port 11, the return air port 7 and the air outlet 9 are closed, the air exhauster 12 is stopped, and the air blower 13 is started, in which mode, outdoor fresh air enters the fresh air bypass duct from the fresh air port 5 and flows into the room along the fresh air bypass duct to the air supply port 3.
As shown in fig. 4, when the fresh air fan is in the double bypass mode, the fresh air bypass duct and the return air bypass duct are all connected, the fresh air duct, the return air duct and the air mixing port are all closed, the air supply port 3, the fresh air port 5, the return air port 7 and the air outlet 9 are all opened, and the exhaust fan 12 and the blower 13 are all opened.
As shown in fig. 5, when the fresh air fan is in the internal circulation mode, the fresh air bypass duct and the return air bypass duct are all connected, the fresh air duct, the return air duct, the fresh air port 5 and the air outlet 9 are all closed, the air supply port 3, the return air port 7 and the air mixing port 11 are all opened, the air exhauster 12 is stopped, and the air blower 13 is started.
As shown in fig. 6, when the fresh air fan is in the circulation heat exchange mode, the fresh air duct, the fresh air bypass duct, the return air inlet 7 and the air outlet 9 are all opened, the return air bypass duct, the air supply outlet 3, the fresh air inlet 5 and the air mixing outlet 11 are all closed, the air outlet of the air blower 13 rotates 90 ° to face the air supply cavity 4, the air blower 13 and the air outlet 12 are all opened, in this mode, indoor return air enters the return air duct from the return air inlet 7, air between the fresh air duct and the fresh air bypass duct passes through the heat exchange core 2 under the driving of the air blower 13, two airflows pass through the heat exchange core 2 to be partially discharged outdoors along the return air duct to the air outlet 9, and another part enters the fresh air duct to continue circulating flow between the fresh air duct and the fresh air bypass duct.
The air port is closed and opened by controlling the corresponding air valve, and the air duct is connected or closed by controlling the corresponding air valve.
The invention also provides a control method of the adjustable fresh air machine, which comprises a temperature control method and/or a humidity control method.
The temperature control method comprises the following steps: detecting the temperature Tx of the fresh air inlet and the temperature Th of the return air inlet in real time; judging whether the absolute Tx-Th is less than or equal to a first preset value TA, if so, controlling the operation mode of the new fan according to the indoor air quality, otherwise, controlling the operation mode of the new fan according to the operation temperature parameter of the new fan and the indoor air quality. The operation temperature parameters of the fresh air machine comprise: the temperature Tx of the fresh air port, the temperature Ts of the air supply port and the target temperature T of the fresh air fan are set.
The humidity control method comprises the following steps: detecting the humidity Hx of the fresh air inlet and the humidity Hh of the return air inlet in real time; judging whether the I Hx-Hh I is less than or equal to a first preset value HA, if yes, controlling the operation mode of the new fan according to the indoor air quality, otherwise, controlling the operation mode of the new fan according to the operation humidity parameter of the new fan and the indoor air quality. The running humidity parameters of the fresh air machine comprise: the fresh air port humidity Hx, the air supply port humidity Hs and the fresh air fan target humidity H are set.
The indoor air quality in the temperature control method and the humidity control method is obtained by detecting the indoor CO2 concentration and comparing the indoor CO2 concentration with a preset concentration value P.
As shown in fig. 7, specifically, the temperature control method includes the steps of:
step a, detecting the temperature Tx of a fresh air port and the temperature Th of a return air port in real time, judging whether the absolute Tx-Th is less than or equal to a first preset value TA, if yes, executing the step a.0, otherwise, executing the step a.1;
a.0, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering a fresh air supply mode by a fresh air fan, otherwise, entering a double bypass mode by the fresh air fan;
a.1, judging whether Tx is more than or equal to a preset outdoor temperature TD, if yes, executing a step a.2, otherwise, executing a step a.3;
step a.2, judging whether the |Ts-T is set to be equal to or larger than a second preset value TB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
and a step a.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, and otherwise, entering a circulation heat exchange mode.
When the fresh air fan is used in summer, the set target temperature of the fresh air fan has good use effect when the set target temperature of the fresh air fan meets the condition that the T is more than or equal to the indoor environment temperature T, and when the fresh air fan is used in winter, the set target temperature of the fresh air fan has good use effect when the set target temperature of the fresh air fan meets the condition that the T is less than or equal to the indoor environment temperature T. Under the condition that an air conditioner is arranged indoors and the air conditioner works, when the fresh air machine is used in summer, the set fresh air machine target temperature has a good use effect when meeting the condition that T is more than or equal to the air conditioner target temperature, and when the fresh air machine is used in winter, the set fresh air machine target temperature has a good use effect when meeting the condition that T is less than or equal to the air conditioner target temperature.
Specifically, the humidity control method includes the steps of:
step b, detecting the humidity Hx of the fresh air inlet and the humidity Hh of the return air inlet in real time, judging whether the I Hx-Hh I is less than or equal to a first preset value HA, if yes, executing a step b.0, otherwise, executing a step b.1;
b.0, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering a fresh air supply mode by the fresh air fan, otherwise, entering a double bypass mode by the fresh air fan;
b.1, judging whether Hx is more than or equal to preset outdoor humidity HD, if so, executing the step b.2, otherwise, executing the step b.3;
b.2, judging whether the I Hs-H is larger than or equal to a second preset value HB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
and b.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, and otherwise, entering a circulation heat exchange mode.
When the fresh air fan is used in summer, the set target humidity of the fresh air fan has good use effect when meeting that H is more than or equal to indoor environment temperature H, and when the fresh air fan is used in winter, the set target humidity of the fresh air fan has good use effect when meeting that H is less than or equal to indoor environment temperature H. Under the condition that an air conditioner is arranged indoors and the air conditioner works, when the fresh air machine is used in summer, the set fresh air machine target humidity has a good use effect when meeting H and setting the fresh air machine target humidity to be more than or equal to the air conditioner target humidity, and when the fresh air machine is used in winter, the set fresh air machine target humidity has a good use effect when meeting H and setting the fresh air machine target humidity to be less than or equal to the air conditioner target humidity.
It should be noted that, in order to ensure that the control mode of the fresh air fan is more accurate, and avoid that the fresh air fan frequently switches the operation mode after the fresh air fan is started, after the fresh air fan is started and operates in the heat exchange mode for a preset time m, the temperature control method and/or the humidity control method are executed, the temperature is detected by the temperature sensor, the humidity is detected by the humidity sensor, the air quality is detected by the gas sensor, the temperature sensor and the humidity sensor detect and feed back in real time, the gas sensor feeds back once every n minutes, the mentioned time is set according to the actual situation, and the length is not limited.
According to the non-auxiliary heat adjustable total heat fresh air fan device, the flow direction of a system air channel is changed according to an adjustable heat recovery control method through the cooperation of the related sensors, the air supply temperature adjustment control is realized through a series of modes such as circulating heat exchange and the like, the condition of high air supply and indoor temperature is prevented, the air supply comfort is strong, meanwhile, the modes such as internal circulation, air supply and double bypass are not required to overcome the resistance of the core body, the operation power consumption is smaller, and the function selectivity is high and the control flexibility is strong according to the environment transformation and the cooperation of the related sensors.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. An adjustable fresh air machine control method, the adjustable fresh air machine includes: a fresh air duct, a fresh air bypass duct, a return air duct and a return air bypass duct are formed in the shell; the heat exchange core body is communicated with the fresh air channel and the return air channel and is independently arranged outside the fresh air bypass channel and the return air bypass channel; the air valve assembly is regulated, and the on-off state of all air channels in the shell can be switched;
the control method is characterized by comprising the following steps: detecting the temperature Tx of the fresh air inlet and the temperature Th of the return air inlet in real time; judging whether the absolute Tx-Th is less than or equal to a first preset value TA, if so, controlling the running mode of the fresh air machine according to the indoor air quality, otherwise, executing the following steps:
a.1, judging whether Tx is more than or equal to a preset outdoor temperature TD, if yes, executing a step a.2, otherwise, executing a step a.3;
step a.2, judging whether the |Ts-T is set to be equal to or larger than a second preset value TB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
step a.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, otherwise, entering a circulation heat exchange mode;
tx is the temperature of the fresh air inlet, ts is the temperature of the air supply outlet, T is the target temperature of the fresh air inlet, and P is the preset concentration value.
2. An adjustable fresh air machine control method, the adjustable fresh air machine includes: a fresh air duct, a fresh air bypass duct, a return air duct and a return air bypass duct are formed in the shell; the heat exchange core body is communicated with the fresh air channel and the return air channel and is independently arranged outside the fresh air bypass channel and the return air bypass channel; the air valve assembly is regulated, and the on-off state of all air channels in the shell can be switched;
the control method is characterized by comprising the following steps: detecting the humidity Hx of the fresh air inlet and the humidity Hh of the return air inlet in real time; judging whether the I Hx-Hh I is less than or equal to a first preset value HA, if yes, controlling the operation mode of the fresh air machine according to the indoor air quality, otherwise, executing the following steps:
b.1, judging whether Hx is more than or equal to preset outdoor humidity HD, if so, executing the step b.2, otherwise, executing the step b.3;
b.2, judging whether the I Hs-H is larger than or equal to a second preset value HB, if yes, entering a circulating heat exchange mode by the fresh air machine, otherwise, entering the heat exchange mode by the fresh air machine;
b.3, judging whether the indoor CO2 concentration is less than or equal to P, if so, entering an internal circulation mode by the fresh air fan, otherwise, entering a circulation heat exchange mode;
hx is fresh air port humidity, hs is air supply port humidity, H is fresh air fan target humidity, and P is a preset concentration value.
3. The control method according to claim 1 or 2, wherein an air supply chamber provided with an air supply port, a fresh air chamber provided with a fresh air port, a return air chamber provided with a return air port, and an air exhaust chamber provided with an air exhaust port are formed inside the housing;
the fresh air channel and the fresh air bypass channel are connected in parallel between the air supply cavity and the fresh air cavity, the return air channel and the return air bypass channel are connected in parallel between the return air cavity and the air exhaust cavity, a mixing air port is arranged between the fresh air cavity and the air exhaust cavity, and all air ports are provided with air valves for adjusting the opening.
4. The control method according to claim 3, wherein an exhaust fan with an air outlet facing the air outlet is installed in the air exhaust cavity; the air supply cavity is internally and movably provided with an air feeder, and an air outlet of the air feeder can rotate to be opposite to the air supply outlet or towards the air supply cavity.
5. The control method according to claim 4, wherein when the fresh air fan is in the heat exchange mode, the fresh air duct and the return air duct are both connected, the fresh air bypass duct, the return air bypass duct and the air mixing port are both closed, the air supply port, the fresh air port, the return air port and the air outlet are all opened, and the air exhaust fan and the air blower are both opened;
when the fresh air fan is in a fresh air supply mode, the fresh air bypass air channel, the air supply opening and the fresh air opening are opened, the fresh air channel, the return air bypass air channel, the air mixing opening, the return air opening and the air outlet are closed, the exhaust fan is stopped, and the air feeder is opened;
when the fresh air fan is in a double bypass mode, the fresh air bypass air channel and the return air bypass air channel are all communicated, the fresh air channel, the return air channel and the air mixing port are all closed, the air supply port, the fresh air port, the return air port and the air outlet are all opened, and the exhaust fan and the air feeder are all opened;
when the fresh air fan is in an internal circulation mode, the fresh air bypass air duct and the return air bypass air duct are all communicated, the fresh air duct, the return air duct, the fresh air port and the air outlet are all closed, the air supply port, the return air port and the air mixing port are all opened, the air exhaust fan is stopped, and the air feeder is opened;
when the new fan is in the circulation heat exchange mode, the new wind channel, the new wind bypass channel, the return wind inlet and the air outlet are all opened, the return wind bypass channel, the air supply inlet, the new wind inlet and the air mixing inlet are all closed, the air outlet of the air feeder rotates to face the air supply cavity, and the air feeder and the air exhauster are all opened.
6. A control method according to claim 1 or 2, characterized in that the control of the operation mode of the fresh air machine according to the air quality comprises the steps of: judging whether the indoor CO2 concentration is less than or equal to P, if so, entering a fresh air supply mode by the fresh air fan, otherwise, entering a double bypass mode by the fresh air fan.
7. The control method according to claim 1, wherein the temperature T is equal to or higher than the indoor environmental temperature T when the fresh air blower is used in summer; when the novel fan is used in winter, the temperature T is less than or equal to the indoor environment temperature T.
8. The control method according to claim 2, wherein the H is equal to or greater than the indoor environment humidity H when the fresh air blower is used in summer; when the novel fan is used in winter, the H is less than or equal to the indoor environment humidity H.
9. The control method of claim 1, wherein the control method is performed after the fresh air fan is turned on and is operated in a heat exchange mode for a preset time m.
10. The control method of claim 2, wherein the control method is performed after the fresh air fan is turned on and is operated in a heat exchange mode for a preset time m.
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| CN115388480B (en) * | 2022-09-05 | 2024-06-14 | 珠海格力电器股份有限公司 | Air conditioning unit and control method thereof |
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