CN114110872A - Fresh air machine and control method thereof - Google Patents
Fresh air machine and control method thereof Download PDFInfo
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- CN114110872A CN114110872A CN202111470952.6A CN202111470952A CN114110872A CN 114110872 A CN114110872 A CN 114110872A CN 202111470952 A CN202111470952 A CN 202111470952A CN 114110872 A CN114110872 A CN 114110872A
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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
- F24F7/003—Ventilation in combination with air cleaning
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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
- F24F11/0001—Control or safety arrangements for ventilation
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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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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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
- F24F11/70—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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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
- 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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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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
- 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
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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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
- 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
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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- 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
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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)
- Ventilation (AREA)
Abstract
The invention provides a fresh air fan and a control method thereof, wherein the fresh air fan comprises a shell, a fresh air inlet and an outdoor air exhaust outlet which are arranged on the outdoor side, an indoor air exhaust outlet and an indoor air exhaust inlet which are arranged on the indoor side are constructed on the shell, a heat exchange core body is arranged in the shell, the fresh air inlet and the indoor air exhaust outlet can be communicated through the heat exchange core body, the indoor air exhaust inlet and the outdoor air exhaust outlet can be communicated through the heat exchange core body, an air exhaust bypass flow channel is also constructed in the shell, and the air exhaust bypass flow channel can controllably guide indoor air flowing in from the indoor air exhaust inlet to the outdoor air exhaust outlet at least partially. According to the invention, when the heat recovery of the exhaust air flow is not needed, the indoor exhaust air can be discharged out of the room at least partially through the exhaust bypass flow channel, so that the wind resistance of the exhaust air flow can be effectively reduced, the energy consumption of the exhaust fan is reduced, and the whole fresh air fan is more energy-saving.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a new fan and a control method thereof.
Background
With the coming of the national 'double-carbon' strategy and the implementation of the policy of energy conservation and emission reduction, people put forward higher requirements on indoor air environment in the sand dust and haze weather which often appear in recent years. In order to meet the demand of people for a healthier and more comfortable indoor air environment, indoor air treatment equipment is on the market.
The existing indoor air processing equipment mainly comprises a fresh air haze removal machine, a fresh air ventilator, an air purifier and the like. Some of these devices are only used for exchanging and heat recovering indoor and outdoor air, some of the devices realize the air filtering function, and the air purifier mainly purifies the indoor air. The devices have single functions, cannot simultaneously have the functions of refrigeration, heating, energy recovery or bypass, and have insignificant energy-saving effect, especially, when the existing fresh air machine exhausts air indoors, no matter how small the difference of the indoor and outdoor ambient temperatures is, the exhausted air flow needs to flow through the total heat exchange core body, the exhaust resistance is large, the energy consumption of the exhaust air machine is large, and the whole fresh air machine is not energy-saving enough.
Disclosure of Invention
Therefore, the invention provides the new fan and the control method thereof, which can overcome the defects that the air exhaust airflow needs to flow through the total heat exchange core body no matter how small the difference of the indoor and outdoor environment temperatures is when the new fan exhausts air indoors in the related art, the air exhaust resistance is larger, the energy consumption of the air exhaust fan is large, and the whole new fan is not energy-saving enough.
In order to solve the above problems, the present invention provides a fresh air fan, comprising a casing, wherein the casing is provided with a fresh air inlet and an outdoor air outlet on the outdoor side, an indoor air outlet and an indoor air outlet on the indoor side, a heat exchange core is arranged in the casing, the fresh air inlet and the indoor air outlet can be communicated through the heat exchange core, the indoor air outlet and the outdoor air outlet can be communicated through the heat exchange core, the casing is further provided with an air exhaust bypass flow passage, and the air exhaust bypass flow passage can controllably guide at least part of indoor air flowing in from the indoor air outlet to the outdoor air outlet.
In some embodiments, a bypass damper assembly is arranged in the exhaust bypass flow channel, the bypass damper assembly can be controlled to be in an open state when the difference value between the indoor side environment temperature and the outdoor side environment temperature is within a first preset temperature difference range, and the bypass damper assembly can be controlled to be in a closed state when the difference value between the indoor side environment temperature and the outdoor side environment temperature is not within the first preset temperature difference range.
In some embodiments, the housing is further configured with an internal circulation air port at the indoor side, and the internal circulation air port is communicated with the indoor air outlet.
In some embodiments, a heating component is arranged in a flow passage between the fresh air inlet and the heat exchange core.
In some embodiments, a first filter member and/or a second filter member is disposed within the fresh air inlet; and/or a third filtering piece is arranged in the indoor exhaust inlet; and/or a fourth filtering piece is arranged in the inner circulation air opening.
In some embodiments, based on the specific use orientation of the fresh air machine, a first partition plate is disposed on the left side of the heat exchange core, a second partition plate is disposed on the right side of the heat exchange core, the airflow flowing in from the fresh air inlet is introduced into the heat exchange core through a first side of the first partition plate and flows out from a second side of the second partition plate, the airflow flowing in from the indoor exhaust air inlet enters the heat exchange core through a first side of the second partition plate and flows out from a second side of the first partition plate, and the first side and the second side are respectively opposite sides of the heat exchange core.
The invention also provides a control method of the fresh air machine, which is used for controlling the fresh air machine and comprises the following steps:
acquiring a carbon dioxide concentration value rho 1 in an indoor environment, acquiring an indoor set temperature T1 and an outdoor environment temperature T2 when the rho 1 is not lower than a first preset carbon dioxide concentration value rho s1, and judging the size relationship between the indoor set temperature and the outdoor environment temperature;
and controlling the on-off of the fresh air inlet, the internal circulation air port and the exhaust bypass flow passage and the on-off of the exhaust fan and the fresh air fan according to the size relation.
In some embodiments, controlling the on-off of the fresh air inlet, the internal circulation air port, the exhaust bypass flow channel and the start and stop of the exhaust fan and the fresh air fan according to the size relationship comprises:
when T0 is more than or equal to T2 and T1 is more than or equal to T0, the fresh air inlet, the circulation of the exhaust bypass flow channel and the cutoff of the internal circulation air inlet are controlled, and the exhaust fan and the fresh air fan are controlled to be started; alternatively, the first and second electrodes may be,
when T2-T1 is more than T0 or T2-T1 is less than-T0, the circulation of the fresh air inlet, the exhaust bypass flow channel and the internal circulation air port are controlled to be cut off, and the exhaust fan and the fresh air fan are controlled to be started.
In some embodiments, when ρ 1 is lower than a first preset carbon dioxide concentration value ρ s1 and is not lower than a second preset carbon dioxide concentration value ρ s2, and T2-T1 is greater than T0 or T2-T1 is smaller than-T0, controlling the circulation of the fresh air inlet and the internal circulation air inlet, and controlling the opening of the exhaust air fan and the fresh air fan; or when rho 1 is lower than a second preset dioxide concentration value rho s2, the fresh air inlet and the exhaust bypass flow channel are controlled to be cut off, the circulation of the internal circulation air inlet is controlled, and the exhaust fan is controlled to be stopped or to be kept stopped and the fresh air fan is controlled to be started.
In some embodiments, the control method further comprises: and when the T2 is smaller than the preset outdoor value Ty, controlling the heating component to start.
According to the fresh air fan and the control method thereof, when the temperature difference between the indoor environment and the outdoor environment is small, namely heat recovery of exhaust air flow is not needed, indoor exhaust air can be at least partially exhausted outdoors through the exhaust bypass flow channel, so that the wind resistance of the exhaust air flow can be effectively reduced, the energy consumption of the exhaust air fan is reduced, and the whole fresh air fan is more energy-saving.
Drawings
Fig. 1 is a schematic view (in plan view) of the internal structure of a fresh air machine according to an embodiment of the present invention;
FIG. 2 is a schematic view of the flow direction of the fresh air fan in FIG. 1 in an exhaust bypass mode;
FIG. 3 is a schematic view illustrating the airflow direction of the new blower in FIG. 1 in a new blowing mode;
FIG. 4 is a schematic view illustrating the flow direction of the fresh air fan in FIG. 1 in a wind mixing mode;
FIG. 5 is a schematic view of the flow direction of the fresh air fan in FIG. 1 in the internal circulation mode;
fig. 6 is a vertical cross-sectional view of fig. 1 showing the relationship of the cross-over of the exhaust air flow and the fresh air flow in the height direction within the heat exchange core.
The reference numerals are represented as:
1. a housing; 11. a fresh air inlet; 12. an outdoor exhaust outlet; 13. an indoor air outlet; 14. an indoor exhaust inlet; 15. an internal circulation tuyere; 2. a heat exchange core; 21. a first separator; 22. a second separator; 3. an exhaust bypass flow passage; 31. a bypass damper assembly; 4. a heating member; 51. a first filter member; 52. a second filter member; 53. a third filter member; 54. a fourth filter member; 61. an exhaust fan; 62. a fresh air fan; 71. a fresh air valve; 72. an internal circulation air valve; 81. an outdoor ambient temperature sensor; 82. an indoor ambient temperature sensor; 83. an indoor carbon dioxide sensor; 100. an indoor heat exchanger; 101. and a controller.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present invention, a new blower is provided, which includes a casing 1, the casing 1 is configured with a new air inlet 11 and an outdoor air outlet 12 at an outdoor side, an indoor air outlet 13 and an indoor air outlet 14 at an indoor side, an air exhaust blower 61 is disposed at the outdoor air outlet 12, a new air blower 62 is disposed at the indoor air outlet 13, a heat exchange core 2 is disposed in the casing 1, the new air inlet 11 and the indoor air outlet 13 can be communicated via the heat exchange core 2, the indoor air outlet 14 and the outdoor air outlet 12 can be communicated via the heat exchange core 2, an air exhaust bypass flow channel 3 is further configured in the casing 1, the air exhaust bypass flow channel 3 can controllably guide indoor air flowing in from the indoor air outlet 14 to the outdoor air outlet 12 at least partially, it can be understood that when the fresh air flow and the exhaust air flow both pass through the heat exchange core 2, the two air flows form heat exchange therebetween, thereby achieving heat recovery of the exhaust air flow from the fresh air flow. In the technical scheme, when the environmental temperature difference between the indoor environment and the outdoor environment is small, namely the heat recovery of the exhaust air flow is not needed, the indoor exhaust air can be discharged out of the room at least partially through the exhaust bypass flow channel 3, so that the wind resistance of the exhaust air flow can be effectively reduced, the energy consumption of the exhaust fan 61 is reduced, and the whole fresh air fan is more energy-saving.
In some embodiments, the exhaust bypass flow channel 3 is provided with a bypass damper assembly 31, when the difference between the indoor ambient temperature and the outdoor ambient temperature is within a first preset temperature difference range, the bypass damper assembly 31 can be controlled to be in an open state, that is, at this time, because the indoor and outdoor temperature difference is small, heat recovery of exhaust air may not be needed, and the indoor air flowing in from the indoor exhaust inlet 14 may be at least partially guided to the outdoor exhaust outlet 12 via the exhaust bypass flow channel 3 to be discharged to the outside, thereby reducing exhaust wind resistance and reducing fan energy consumption; when the difference between the indoor ambient temperature and the outdoor ambient temperature is not within the first preset temperature difference range, the bypass air valve assembly 31 can be controlled to be in a closed state, the indoor and outdoor ambient temperature difference is large, heat recovery is carried out on indoor exhaust air to carry out necessary temperature adjustment on the entering fresh air, fluctuation of the fresh air to the indoor ambient temperature after being introduced is reduced, indoor air flowing into the indoor exhaust inlet 14 can be at least partially guided to the outdoor exhaust outlet 12 through the exhaust bypass flow channel 3, and the indoor air is discharged to the outside.
The shell 1 is also provided with an internal circulation air port 15 positioned at the indoor side, and the internal circulation air port 15 is communicated with the indoor air outlet 13 so as to realize the internal circulation of indoor air by the fresh air fan 62 when fresh air is not required to be introduced from the outdoor.
It should be noted that the fresh air machine includes a compressor (not shown in the drawings) and an outdoor heat exchanger (not shown in the drawings) which are in refrigerant circulation communication with the indoor heat exchanger 100, so as to implement cooling or heating operation of the fresh air machine. In the exhaust bypass flow passage 3, a controller 101 of the fresh air machine is further provided so that the controller 101 can be cooled by exhaust air.
In some embodiments, a heating component 4 (specifically, an electric heater) is disposed in a flow channel between the fresh air inlet 11 and the heat exchange core 2, so as to control the operation of the heating component to heat the introduced fresh air when the outdoor ambient temperature is low, and prevent the heat exchange core 2 from freezing. The air circulation of the fresh air inlet 11 is controlled by a fresh air valve 71 arranged in the fresh air inlet, and the air circulation of the internal circulation air inlet 15 is controlled by an internal circulation air valve 72 arranged in the internal circulation air inlet. In some embodiments, a first filter element 51 (e.g., a primary filter) and/or a second filter element 52 (e.g., a high efficiency filter) is disposed within the fresh air inlet 11; and/or, a third filtering piece 53 (such as a filtering net) is arranged in the indoor exhaust air inlet 14; and/or, a fourth filtering member 54 is provided in the inner circulation tuyere 15 to filter impurities from the air flow passing therethrough.
In some embodiments, with reference to the specific use orientation of the fresh air fan, specifically referring to fig. 6, a first partition 21 is disposed on the left side of the heat exchange core 2, a second partition 22 is disposed on the right side of the heat exchange core 2, the airflow flowing in from the fresh air inlet 11 is introduced into the heat exchange core 2 through a first side (specifically, for example, an upper side) of the first partition 21 and flows out from a second side (specifically, for example, a lower side) of the second partition 22, the airflow flowing in from the indoor exhaust air inlet 14 enters the heat exchange core 2 through a first side of the second partition 22 and flows out from a second side of the first partition 21, the first side and the second side are respectively opposite sides of the heat exchange core 2, so that the exhaust airflow and the fresh air airflow can form an intersection in the heat exchange core 2, and the heat recovery efficiency is improved, the thickness design size of the heat exchange core body 2 can be reduced, so that the overall height of the fresh air fan is reduced, and the novel fan lifting device is particularly suitable for the working condition of lifting the fresh air fan.
According to an embodiment of the present invention, there is also provided a control method of a fresh air machine, for controlling the fresh air machine, including the steps of:
acquiring a carbon dioxide concentration value rho 1 in an indoor environment through an indoor carbon dioxide sensor arranged on the inner side of a fresh air machine chamber, and acquiring an indoor set temperature T1 (acquired by an indoor environment temperature sensor 82 arranged on the inner side of the fresh air machine chamber) and an outdoor environment temperature T2 (acquired by an outdoor environment temperature sensor 81 arranged on the outer side of the fresh air machine chamber) when the rho 1 is not lower than a first preset carbon dioxide concentration value rho s1 and judging the size relationship of the indoor set temperature T1 and the outdoor environment temperature T2;
and controlling the on-off of the fresh air inlet 11, the internal circulation air port 15 and the exhaust bypass flow channel 3 (specifically, controlling the on-off of the fresh air valve 71, the internal circulation air valve 72 and the bypass air valve assembly 31 which are correspondingly arranged) and the on-off of the exhaust fan 61 and the fresh air fan 62 according to the size relationship.
Specifically, controlling the on-off of the fresh air inlet 11, the internal circulation air port 15 and the exhaust bypass flow channel 3 and the start and stop of the exhaust fan 61 and the fresh air fan 62 according to the size relationship comprises:
when-T0 is not less than T2-T1 is not less than T0, the fresh air inlet 11 and the exhaust bypass channel 3 are controlled to circulate, the internal circulation air port 15 is cut off, and the exhaust fan 61 and the fresh air fan 62 are controlled to be started, namely the fresh air fan is controlled to operate an exhaust bypass mode (the airflow flow is schematically shown in figure 2); or, when T2-T1 is greater than T0 or T2-T1 is smaller than-T0, the fresh air inlet 11 is controlled to circulate, the exhaust bypass flow channel 3 and the internal circulation air opening 15 are cut off, and the exhaust fan 61 and the fresh air fan 62 are controlled to be started, that is, the fresh air fan is controlled to operate in a fresh air mode (the airflow flow is schematically shown in fig. 3).
When the temperature difference between the indoor environment and the outdoor environment is small, namely the heat recovery of the exhaust air flow is not needed, the indoor exhaust air can be discharged outdoors through the exhaust bypass flow channel 3 without flowing through the heat exchange core body 2, so that the wind resistance of the exhaust air flow can be effectively reduced, the energy consumption of the exhaust fan 61 is reduced, and the whole fresh air fan is more energy-saving
In some embodiments, when ρ 1 is lower than a first preset carbon dioxide concentration value ρ s1 and not lower than a second preset carbon dioxide concentration value ρ s2, and T2-T1 > T0 or T2-T1 < -T0, controlling the fresh air inlet 11 and the internal circulation air port 15 to circulate, and controlling the exhaust fan 61 and the fresh air fan 62 to be turned on, that is, controlling the fresh air fan to operate in an air mixing mode (see fig. 4 for an air flow schematic diagram); or, when ρ 1 is lower than a second preset value ρ s2 of the concentration of the dioxide, the fresh air inlet 11 and the exhaust bypass flow channel 3 are controlled to be cut off, the circulation of the internal circulation air inlet 15 is controlled, the exhaust fan 61 is controlled to be stopped or kept to be stopped, and the fresh air fan 62 is controlled to be started, that is, the fresh air fan is controlled to operate in an internal circulation mode (see fig. 5 for schematic airflow flow).
In some embodiments, the control method further comprises: when T2 is less than preset outdoor value Ty, that is when outdoor ring temperature is too low, control heating element 4 starts in order to get into the new trend heating in the heat exchange core 2, prevent to freeze in it and form airflow blockage or windage increase.
In a specific embodiment, ρ s1 is 900-1100 PPM; the value of the rho s2 is 600-900 PPM; t0 is 1-5 deg.C; ty is-30-0 ℃.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. A new fan is characterized by comprising a shell (1), wherein a new air inlet (11) and an outdoor air exhaust outlet (12) which are positioned at the outdoor side, an indoor air exhaust outlet (13) and an indoor air exhaust inlet (14) which are positioned at the indoor side are constructed on the shell (1), a heat exchange core body (2) is arranged in the shell (1), the fresh air inlet (11) and the indoor air outlet (13) can be communicated through the heat exchange core body (2), the indoor discharge air inlet (14) and the outdoor discharge air outlet (12) can be communicated through the heat exchange core body (2), an exhaust air bypass flow channel (3) is also constructed in the casing (1), and the exhaust air bypass flow channel (3) can controllably guide the indoor air flowing in from the indoor exhaust air inlet (14) to the outdoor exhaust air outlet (12) at least partially.
2. The fresh air machine according to claim 1, wherein a bypass damper assembly (31) is disposed in the exhaust bypass flow channel (3), the bypass damper assembly (31) can be controlled to be in an open state when a difference value between an indoor side ambient temperature and an outdoor side ambient temperature is within a first preset temperature difference range, and the bypass damper assembly (31) can be controlled to be in a closed state when the difference value between the indoor side ambient temperature and the outdoor side ambient temperature is not within the first preset temperature difference range.
3. The new fan according to claim 1, characterized in that the casing (1) is also configured with an internal circulation air opening (15) at the indoor side, the internal circulation air opening (15) is communicated with the indoor air outlet (13).
4. The new fan according to claim 1, characterized in that a heating component (4) is arranged in a flow path between the new air inlet (11) and the heat exchange core (2).
5. The fresh air machine as claimed in claim 3, wherein a first filter element (51) and/or a second filter element (52) is provided in the fresh air inlet (11); and/or a third filtering piece (53) is arranged in the indoor exhaust air inlet (14); and/or a fourth filtering piece (54) is arranged in the internal circulation tuyere (15).
6. The new fan according to claim 1, wherein a first partition plate (21) is disposed on the left side of the heat exchange core (2), a second partition plate (22) is disposed on the right side of the heat exchange core (2), the air flow flowing in from the new air inlet (11) is introduced into the heat exchange core (2) through the first side of the first partition plate (21) and flows out from the second side of the second partition plate (22), the air flow flowing in from the indoor exhaust air inlet (14) enters the heat exchange core (2) through the first side of the second partition plate (22) and flows out from the second side of the first partition plate (21), and the first side and the second side are respectively opposite sides of the heat exchange core (2), with respect to the specific use orientation of the new fan.
7. A control method of a fresh air machine, which is used for controlling the fresh air machine of any one of claims 3 or 4, and comprises the following steps:
acquiring a carbon dioxide concentration value rho 1 in an indoor environment, acquiring an indoor set temperature T1 and an outdoor environment temperature T2 when the rho 1 is not lower than a first preset carbon dioxide concentration value rho s1, and judging the size relationship between the indoor set temperature and the outdoor environment temperature;
and controlling the on-off of the fresh air inlet (11), the internal circulation air port (15) and the exhaust bypass flow channel (3) and the start and stop of the exhaust fan (61) and the fresh air fan (62) according to the size relation.
8. The control method according to claim 7, wherein controlling the on/off of the fresh air inlet (11), the internal circulation air port (15), and the exhaust bypass flow channel (3) and the on/off of the exhaust fan (61) and the fresh air fan (62) according to the magnitude relation comprises:
when T0 is more than or equal to T2 and T1 is more than or equal to T0, the fresh air inlet (11), the ventilation of the exhaust bypass flow channel (3) and the cutoff of the internal circulation air inlet (15) are controlled, and the exhaust fan (61) and the fresh air fan (62) are controlled to be started; alternatively, the first and second electrodes may be,
when T2-T1 is more than T0 or T2-T1 is less than-T0, the circulation of the fresh air inlet (11), the exhaust bypass flow channel (3) and the internal circulation air opening (15) are controlled to be cut off, and the exhaust fan (61) and the fresh air fan (62) are controlled to be started.
9. The control method according to claim 7, characterized by controlling the circulation of the fresh air inlet (11), the internal circulation air port (15) and controlling the opening of the exhaust air fan (61) and the fresh air fan (62) when p 1 is lower than a first preset carbon dioxide concentration value ps 1 and is not lower than a second preset carbon dioxide concentration value ps 2 and T2-T1 > T0 or T2-T1 < -T0; or when rho 1 is lower than a second preset dioxide concentration value rho s2, the fresh air inlet (11) and the exhaust bypass flow channel (3) are controlled to be cut off, the circulation of the internal circulation air inlet (15) is controlled, the exhaust fan (61) is controlled to be stopped or kept to be stopped, and the fresh air fan (62) is controlled to be started.
10. The control method according to claim 7, characterized by further comprising:
and when the T2 is smaller than the preset outdoor value Ty, controlling the heating component (4) to start.
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| CN202111470952.6A CN114110872A (en) | 2021-12-03 | 2021-12-03 | Fresh air machine and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847675A (en) * | 2024-03-08 | 2024-04-09 | 苏州贝昂智能科技股份有限公司 | Total heat exchange equipment |
| CN117847675B (en) * | 2024-03-08 | 2024-05-31 | 苏州贝昂智能科技股份有限公司 | Total heat exchange equipment |
-
2021
- 2021-12-03 CN CN202111470952.6A patent/CN114110872A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847675A (en) * | 2024-03-08 | 2024-04-09 | 苏州贝昂智能科技股份有限公司 | Total heat exchange equipment |
| CN117847675B (en) * | 2024-03-08 | 2024-05-31 | 苏州贝昂智能科技股份有限公司 | Total heat exchange equipment |
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