CN114183830B - Fresh air conditioner and control method thereof - Google Patents
Fresh air conditioner and control method thereof Download PDFInfo
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- CN114183830B CN114183830B CN202111470747.XA CN202111470747A CN114183830B CN 114183830 B CN114183830 B CN 114183830B CN 202111470747 A CN202111470747 A CN 202111470747A CN 114183830 B CN114183830 B CN 114183830B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 88
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 44
- 239000001569 carbon dioxide Substances 0.000 claims description 42
- 238000009423 ventilation Methods 0.000 claims description 15
- 230000007613 environmental effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 12
- 238000011084 recovery Methods 0.000 description 8
- 241001417527 Pempheridae Species 0.000 description 6
- 238000005192 partition Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000004576 sand 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
- F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
- F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—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
- F24F13/28—Arrangement or mounting of filters
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—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
Landscapes
- 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)
- Thermal Sciences (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention provides a fresh air conditioner and a control method thereof, the fresh air conditioner comprises: fresh air inlet, air exhaust outlet, fresh air outlet, heat exchange core, fresh air channel and fresh air bypass channel, fresh air sucked through fresh air inlet can be fed into fresh air channel, and can exchange heat with air exhaust fed through air exhaust inlet at heat exchange core, when outdoor temperature T Outer part Less than a third preset temperature T 3 When the air conditioner is used, fresh air sucked through the fresh air inlet can enter the fresh air bypass channel, air flow in the fresh air bypass channel directly enters a room through the fresh air outlet without heat exchange of the heat exchange core body, and the air flow in the fresh air bypass channel enters the room through the heat exchange core bodyThe length direction is arranged along the width direction of the fresh air conditioner. According to the invention, through the fresh air bypass channel, outdoor fresh air can be introduced into a room through the fresh air bypass channel under the conditions that the outdoor environment is low in temperature and indoor air needs to be ventilated, so that the problem that the heat exchange core is frozen or frozen is prevented.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a fresh air conditioner and a control method thereof.
Background
Along with the implementation of national 'double carbon' strategy and energy conservation and emission reduction policies, people have put forward higher requirements on indoor air environment in recent years on sand dust and haze weather. With the popularization and application of near zero energy consumption buildings, some air treatment equipment appears on the market, and the air treatment equipment has the functions of refrigeration, heating, energy recovery and the like. Meanwhile, in order to realize energy conservation, a full heat exchange core body is adopted for heat recovery of the fresh air fan, but the core body is easy to freeze under the condition of low temperature, and in order to solve the problem, the common practice is to add an electric heating on the air inlet side of the core body to preheat fresh air, and the electric heating has higher power consumption, which is contrary to the energy conservation concept, and the contradiction cannot be well solved.
Because the fresh air conditioner system in the prior art has the technical problems that the total heat exchange core body is easy to cause icing and the like under the low temperature condition, the invention designs the fresh air conditioner and the control method thereof.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the total heat exchange core body is easy to cause icing under the condition of low temperature in the fresh air conditioner system in the prior art, thereby providing the fresh air conditioner and the control method thereof.
In order to solve the above problems, the present invention provides a fresh air conditioner, comprising:
fresh air inlet, air exhaust outlet, fresh air outlet, heat exchange core, fresh air channel and fresh air bypass channel, the fresh air sucked through the fresh air inlet can enter the fresh air channel and exchange heat with the air exhaust inlet and the air exhaust in the heat exchange core, when outdoor temperature T Outer part Less than a third preset temperature T 3 During the time, through the inhaled new trend of new trend import can get into in the new trend bypass channel, the air current in the new trend bypass channel does not pass through the heat exchange of heat exchange core body is direct through the new trend export gets into indoor, the length direction of heat exchange core body is arranged along the width direction of new trend air conditioner.
In some embodiments, the heat exchange device further comprises an exhaust chamber, wherein the exhaust chamber is communicated with the exhaust inlet, the fresh air channel can be communicated with the fresh air inlet, and the heat exchange core is positioned in the fresh air channel or positioned in the exhaust chamber and contacted with the fresh air channel, so that the fresh air in the fresh air channel and the exhaust air in the exhaust chamber exchange heat at the heat exchange core;
the fresh air bypass channel can also be communicated with the fresh air inlet, and the heat exchange core body does not exchange heat with the fresh air bypass channel.
In some embodiments, the fresh air channel is disposed in the exhaust chamber, the fresh air bypass channel is also disposed in the exhaust chamber, the fresh air channel is connected with the fresh air bypass channel, and the heat exchange core is in contact heat exchange with only the fresh air channel.
In some embodiments, the exhaust outlet is communicated with the exhaust chamber, and an exhaust fan is further arranged at the exhaust outlet; and an exhaust filter is further arranged at the exhaust inlet to filter indoor exhaust air sucked by the exhaust inlet.
In some embodiments, the system further comprises a fresh air chamber, wherein the fresh air chamber is communicated and arranged between the fresh air inlet and the fresh air channel or the fresh air bypass channel, and one end of the fresh air chamber is communicated with the fresh air inlet, and the other end of the fresh air chamber is communicated with the fresh air channel or the fresh air bypass channel; and a fresh air filter is further arranged in the fresh air chamber.
In some embodiments, the system further comprises a fresh air valve and a fresh air bypass vent valve, wherein the fresh air valve can control the fresh air chamber to be opened or closed, and the fresh air bypass vent valve can control the fresh air bypass channel to be opened or closed.
In some embodiments, the device further comprises an internal circulation chamber, an internal circulation air inlet and an internal circulation air valve, wherein the internal circulation air inlet is communicated with the internal circulation chamber, one end of the internal circulation chamber is also respectively communicated with the fresh air channel and the fresh air bypass channel, the other end of the internal circulation chamber is also communicated with the fresh air outlet, and the internal circulation air valve can be controlled to be opened or closed by the internal circulation air inlet.
In some embodiments, the airflow from the internal circulation wind inlet is further provided with an internal circulation filter at the downstream end,
a fresh air fan and a heat exchanger are arranged in the internal circulation chamber, and the fresh air outlet is communicated with the room;
the inner circulation chamber is also provided with a fresh air temperature and humidity sensor and a carbon dioxide sensor; the fresh air conditioner further comprises an electric controller.
The invention also provides a control method of the fresh air conditioner, which comprises the following steps:
a detection step of detecting the indoor carbon dioxide concentration C and the indoor environment temperature T Inner part And outdoor ambient temperature T Outer part ；
A judging step of judging a relationship between the carbon dioxide concentration C and the first and second set concentrations A and B and judging the outdoor environment temperature T Outer part And a third set temperature T 3 Relationship between them, determine the indoor environmental temperature T Inner part And a second set temperature T 2 Relationship between them and determination of outdoor ambient temperature T Outer part With indoor environment temperature T Inner part A relationship between;
a control step of controlling the reaction system according to dioxygenRelationship between carbon concentration C and first and second set concentrations A and B, respectively, outdoor ambient temperature T Outer part And a third set temperature T 3 Relationship between indoor ambient temperature T Inner part And a second set temperature T 2 Relationship between them and outdoor ambient temperature T Outer part With indoor environment temperature T Inner part And controlling the fresh air conditioner to execute one of a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode.
In some embodiments, when the exhaust fan, the fresh air damper, the fresh air bypass damper, and the internal circulation damper are included at the same time:
in the judging step, the judging condition 1 is C more than or equal to A, the judging condition 2 is B more than or equal to C less than A, and the judging condition 3 is-T 1 ≤T Outer part -T Inner part ≤T 1 Determination condition 4 is T Outer part ≤T 3 Determination condition 5 is T Outer part ＜T Inner part And T is Inner part ＞T 2 ；
In the control step, if the judging conditions 1 and 2 are not met, the exhaust fan is controlled to be closed, the fresh air valve is controlled to be closed, the fresh air side ventilation valve is closed, the internal circulation air valve is opened, and an internal circulation mode is operated;
when judging that the judging condition 1 is met and the judging condition 4 is met, controlling to close an internal circulation air valve, opening a fresh air valve, opening a fresh air side air valve, opening the exhaust fan, and operating a fresh air bypass mode;
when the judgment condition 1 is met and the judgment condition 5 is met, controlling to close an internal circulation air valve, opening a fresh air valve, opening a fresh air side air valve, opening the exhaust fan, and operating a fresh air bypass mode;
when the judging condition 1 is met and the judging condition 3 is not met, controlling to close an internal circulation air valve, opening a fresh air valve, closing a fresh air side air valve, opening an exhaust fan, and operating a total heat exchange fresh air mode;
when the judging condition 2 is met and the judging condition 3 is not met, controlling to open a fresh air valve, closing a fresh air side ventilation valve, opening the internal circulation air valve, opening the exhaust fan and operating a mixing mode;
wherein A is a first carbon dioxide concentration set value, B is a second carbon dioxide concentration set value, T 1 For the first set temperature value, T 2 For the second set temperature value, T 3 And a third set temperature value.
In some embodiments, A takes on a value of 900-1100PPM, B takes on a value of 600-900PPM, T 1 Take the value of 1-5 ℃ and T 2 The value is 26-30 ℃, T 3 The value is-30-0 ℃.
The fresh air conditioner and the control method thereof provided by the invention have the following beneficial effects:
1. according to the invention, the fresh air inlet and the fresh air outlet formed in the fresh air conditioner can introduce fresh air from outside to inside, air can be introduced from inside and discharged outside through the exhaust inlet and the exhaust outlet, the exchange of indoor and outdoor fresh air flow and dirty air flow is effectively completed, and the heat exchange core, the fresh air channel and the fresh air bypass channel are further arranged, so that when the outdoor fresh air enters the fresh air channel, the heat exchange can be carried out between the heat exchange core and the indoor exhaust air, a certain amount of heat or cold can be transferred to the outdoor fresh air by utilizing the indoor exhaust air when the temperature difference between the outdoor fresh air and the indoor fresh air is large, the energy of the indoor exhaust air is effectively recovered (mainly heat recovery), the energy recovery function is realized, and a good energy saving effect is achieved while the indoor air quality is effectively improved; the fresh air bypass channel can exchange heat with the heat exchange core body, so that the heat exchange of the fresh air through the heat exchange core body is not needed under the condition that the temperature difference between the outdoor fresh air and the indoor exhaust air is small, the load during the fresh air heat exchange is effectively reduced, the wind resistance is reduced, and the service life of the system is prolonged; the outdoor fresh air can be guided into the room through the fresh air bypass channel under the conditions that the outdoor environment is low in temperature and the indoor air needs to be ventilated, and the heat exchange of the heat exchange core body is not performed, so that the problems that the heat exchange core body is frozen or frosted are effectively prevented; the invention also can directly refrigerate and cool the room by utilizing the outdoor fresh air when the outdoor air temperature is lower than the indoor air temperature and the indoor air temperature is higher through the fresh air bypass channel, and the energy efficiency of the air conditioning system can be improved without heat exchange of the heat exchange core body at the moment;
2. the fresh air environmental control all-in-one machine provided by the invention can realize a full fresh air mode, a mixed air mode, an internal circulation mode, a fresh air bypass mode and the like, has the functions of heating, refrigerating, air purifying, fresh air ventilation, bypass and the like, can adjust different functions according to environmental requirements, has an energy recovery function, can effectively improve the indoor air quality, achieves a good energy saving effect, has an obvious energy saving effect, can monitor the indoor temperature and humidity, CO2 concentration and PM2.5 parameter states in real time, and can effectively adjust.
Drawings
FIG. 1 is a schematic diagram of the overall internal structure of a fresh air conditioner according to the present invention;
FIG. 2 is a flow chart of the fresh air conditioner in the fresh air mode;
FIG. 3 is a flow chart of the fresh air conditioner in the air mixing mode;
FIG. 4 is a flow chart of air in the internal circulation mode of the fresh air conditioner of the present invention;
FIG. 5 is a flow chart of the fresh air conditioner in the fresh air bypass mode;
FIG. 6 is a schematic view showing the internal structure of a heat exchange core of a fresh air conditioner according to the present invention;
fig. 7 is a flowchart of a control method of the fresh air conditioner of the present invention.
The reference numerals are expressed as:
1. an exhaust fan; 2. an electric controller; 3. a temperature and humidity sensor; 4. a carbon dioxide sensor; 5. a heat exchanger; 6. fresh air blower; 7. a fresh air outlet; 8. an internal circulation wind inlet; 9. an internal circulation air valve; 10. an internal circulation filter; 11. an exhaust inlet; 12. an exhaust filter; 13. a heat exchange core; 131. a first side separator; 132. a second side separator; 14. a fresh air bypass channel; 15. a fresh air side ventilation valve; 16. fresh air filter; 17. a fresh air valve; 18. a fresh air inlet; 19. an exhaust outlet; 100. a fresh air channel; 200. an exhaust chamber; 300. a fresh air chamber; 400. an internal circulation chamber.
Detailed Description
As shown in fig. 1 to 6, the present invention provides a fresh air conditioner, comprising:
fresh air inlet 18, air exhaust inlet 11, air exhaust outlet 19, fresh air outlet 7, heat exchange core 13, fresh air channel 100 and fresh air bypass channel 14, fresh air sucked through fresh air inlet 18 can enter fresh air channel 100 and exchange heat with air exhaust entering through air exhaust inlet 11 at heat exchange core 13, when outdoor temperature T is reached Outer part Less than a third preset temperature T 3 When the fresh air sucked through the fresh air inlet 18 can enter the fresh air bypass channel 14, the air flow in the fresh air bypass channel 14 directly enters the room through the fresh air outlet 7 without heat exchange of the heat exchange core 13, and the length direction of the heat exchange core 13 is arranged along the width direction of the fresh air conditioner.
According to the invention, the fresh air inlet and the fresh air outlet formed in the fresh air conditioner can introduce fresh air from outside to inside, air can be introduced from inside and discharged outside through the exhaust inlet and the exhaust outlet, the exchange of indoor and outdoor fresh air flow and dirty air flow is effectively completed, and the heat exchange core, the fresh air channel and the fresh air bypass channel are further arranged, so that when the outdoor fresh air enters the fresh air channel, the heat exchange can be carried out between the heat exchange core and the indoor exhaust air, a certain amount of heat or cold can be transferred to the outdoor fresh air by utilizing the indoor exhaust air when the temperature difference between the outdoor fresh air and the indoor fresh air is large, the energy of the indoor exhaust air is effectively recovered (mainly heat recovery), the energy recovery function is realized, and a good energy saving effect is achieved while the indoor air quality is effectively improved; the fresh air bypass channel can exchange heat with the heat exchange core body, so that the heat exchange of the fresh air through the heat exchange core body is not needed under the condition that the temperature difference between the outdoor fresh air and the indoor exhaust air is small, the load during the fresh air heat exchange is effectively reduced, the wind resistance is reduced, and the service life of the system is prolonged; the outdoor fresh air can be guided into the room through the fresh air bypass channel under the conditions that the outdoor environment is low in temperature and the indoor air needs to be ventilated, and the heat exchange of the heat exchange core body is not performed, so that the problems that the heat exchange core body is frozen or frosted are effectively prevented; the invention also can directly refrigerate and cool the room by utilizing the outdoor fresh air when the outdoor air temperature is lower than the indoor air temperature and the indoor air temperature is higher through the fresh air bypass channel, and the energy efficiency of the air conditioning system can be improved without heat exchange of the heat exchange core body.
The fresh air environmental control all-in-one machine provided by the invention can realize a full fresh air mode, a mixed air mode, an internal circulation mode, a fresh air bypass mode and the like, has the functions of heating, refrigerating, air purifying, fresh air ventilation, bypass and the like, can adjust different functions according to environmental requirements, has an energy recovery function, can effectively improve the indoor air quality, achieves a good energy saving effect, has an obvious energy saving effect, can monitor the indoor temperature and humidity, CO2 concentration and PM2.5 parameter states in real time, and can effectively adjust.
The invention provides a fresh air machine integrating a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode, which is used for switching various modes according to requirements, and has remarkable energy-saving effect.
2. The unit is provided with the fresh air bypass channel and the air valve, and fresh air can be introduced into the indoor space without passing through the total heat exchange core body through corresponding control.
In some embodiments, further comprising an exhaust chamber 200, the exhaust chamber 200 being in communication with the exhaust inlet 11 and the fresh air channel 100 being capable of communicating with the fresh air inlet 18, the heat exchange core 13 being located in the fresh air channel 100 or in the exhaust chamber 200 and in contact with the fresh air channel 100 such that the fresh air in the fresh air channel 100 and the exhaust air in the exhaust chamber 200 exchange heat at the heat exchange core 13;
the fresh air bypass channel 14 can also be communicated with the fresh air inlet 18, and the heat exchange core 13 does not exchange heat with the fresh air bypass channel 14.
According to the invention, the exhaust chamber is arranged, indoor air can be introduced from the exhaust inlet, the fresh air channel is communicated with the fresh air inlet to suck outdoor fresh air, the heat exchange core body can enable the fresh air channel to exchange heat with the exhaust chamber, the fresh air bypass channel is communicated with the fresh air inlet to suck fresh air, but the fresh air bypass channel cannot enable air to flow through the heat exchange core body to exchange heat, so that wind resistance can be effectively reduced, and energy efficiency is improved; the heat exchange core is prevented from being frozen or frozen out and the like caused by heat exchange under the conditions of outdoor low-temperature environment and indoor pollution, so that the heat exchange core is effectively protected; and can also be in indoor dirty and indoor hotter outdoor under the condition such as being cool, also can introduce the outdoor air through the new trend bypass passageway and not pass through the heat exchange core, cool down indoor refrigeration, effectively improved the energy efficiency of system.
Embodiments are described below:
the novel air conditioner comprises an indoor unit and an outdoor unit, wherein a refrigerant pipe is connected between the indoor unit and the outdoor unit, the indoor unit comprises an inner machine shell, the inside of the shell is divided into air channels of all cavities through partition plates, the air channels comprise a fresh air channel, an air exhaust channel, an inner circulation channel and a fresh air bypass channel, the outer side of the inner machine shell is connected with five air inlets, a fresh air inlet 18 is connected with the outside for introducing fresh air, an air exhaust outlet 19 is connected with the outside for exhausting indoor air, an air exhaust inlet 11 is connected with the inside for introducing indoor air, an inner circulation air inlet 8 is connected with the inside for introducing indoor air, and a fresh air outlet 7 is connected with the inside for introducing treated air into the inside.
The unit is provided with a fresh air bypass channel 14, and outdoor fresh air can be sent to the indoor space through the fresh air bypass channel instead of the total heat exchange core body and after passing through the heat exchanger. The fresh air bypass channel is independent of the fresh air channel and the return air channel of the total heat exchange core body, and air flow passing through the bypass air channel does not exchange heat and humidity with exhaust air flow. Fig. 1 is only one mode, and the heat exchange core can be independently arranged at the left and right ends or the upper and lower sides of the total heat exchange core.
The heat exchanger 5 of the unit is arranged into a nonlinear (L-shaped) shape according to the fresh air flow direction and the circulating air flow direction, and the fresh air fan is arranged at the rear end of the heat exchanger, so that fresh air can flow through the heat exchanger more uniformly in a fresh air mode of the unit, and inner circulating air can flow through the heat exchanger more uniformly in an inner circulating mode of the unit.
As shown in fig. 6, the heat exchange core 13 is provided with partitions (including a first side partition 131 and a second side partition 132) at two sides, so that fresh air can enter the lower air duct from the upper air duct, exhaust air enters the lower air duct from the upper air duct, and the fresh air and exhaust air realize the cross countercurrent enhanced temperature and humidity exchange effect inside the heat exchange core 13, thereby realizing the energy saving effect.
In some embodiments, the fresh air channel 100 is disposed in the exhaust chamber 200, the fresh air bypass channel 14 is also disposed in the exhaust chamber 200, the fresh air channel 100 is connected to the fresh air bypass channel 14, and the heat exchange core 13 is in contact with only the fresh air channel 100 for heat exchange; the exhaust outlet 19 is communicated with the exhaust chamber 200, and an exhaust fan 1 is further arranged in the exhaust chamber 200. The invention is a further preferable structural form, namely, a fresh air channel is positioned in an exhaust cavity, a fresh air bypass channel is also positioned in the exhaust cavity, and a heat exchange core body only contacts with the fresh air channel for heat exchange so as to exchange heat with outdoor fresh air by utilizing indoor exhaust air when the indoor and outdoor temperature difference is large, and the energy is recovered; the heat exchange core is not communicated with the fresh air bypass channel so as to close the fresh air channel when the indoor and outdoor temperature difference is small, and ventilation is carried out only through the fresh air bypass channel, so that wind resistance is effectively reduced; the exhaust chamber is communicated with the exhaust outlet to effectively exhaust indoor air to the outside, and the exhaust channel can be opened or closed by the arrangement of the exhaust fan, so that the exhaust chamber is communicated with the exhaust inlet or not.
In some embodiments, the air conditioner further comprises an air chamber 300, wherein the air chamber 300 is arranged between the air inlet 18 and the air channel 100 or the air bypass channel 14 in a communicating way, and one end of the air chamber 300 is communicated with the air inlet 18, and the other end is communicated with the air channel 100 or the air bypass channel 14; and a fresh air filter 16 is further disposed in the fresh air chamber 300. The invention can be effectively communicated with the fresh air inlet through the fresh air chamber, and the fresh air is conveyed into the fresh air channel or the fresh air bypass channel, and the fresh air can be effectively filtered through the fresh air filter in the fresh air chamber, so that uncomfortable feeling of a human body caused by the fresh air blown into the room is prevented.
In some embodiments, an exhaust filter 12 is further disposed at the exhaust inlet 11 to filter indoor exhaust air sucked by the exhaust inlet 11.
The invention also can filter indoor exhaust air when the indoor exhaust air enters the exhaust chamber through the exhaust filter arranged at the exhaust inlet, prevent impurities and the like from entering the exhaust chamber, and improve the purity of the indoor exhaust air.
In some embodiments, the device further comprises a fresh air valve 17 and a fresh air side vent valve 15, wherein the fresh air valve 17 can control the fresh air chamber 300 to be opened or closed, and the fresh air side vent valve 15 can control the fresh air side channel 14 to be opened or closed. The invention can control the opening or closing of the fresh air chamber through the arrangement of the fresh air valve and the opening or closing of the fresh air bypass channel through the arrangement of the fresh air side air valve, and preferably the fresh air valve can open or close the fresh air channel, and the fresh air side air valve motor can open or close the fresh air bypass channel.
Preferably the fresh air damper comprises a fresh air damper motor, a fresh air sweeper blade, a fresh air bypass damper motor and a fresh air bypass sweeper blade, wherein the fresh air sweeper blade is positioned in the fresh air channel 100, the fresh air bypass sweeper blade is positioned in the fresh air bypass channel 14, the fresh air damper motor can control the fresh air sweeper blade to move so as to open or close the fresh air channel 100, and the fresh air bypass damper motor can control the fresh air bypass sweeper blade to move so as to open or close the fresh air bypass channel 14.
The invention can control the opening or closing of the fresh air channel and the opening or closing of the fresh air bypass channel through the arrangement of the fresh air valve, preferably, the fresh air valve motor can open or close the fresh air channel, and the fresh air bypass valve motor can open or close the fresh air bypass channel.
In some embodiments, the air conditioner further comprises an inner circulation chamber 400, an inner circulation air inlet 8 and an inner circulation air valve 9, wherein the inner circulation air inlet 8 is communicated with the inner circulation chamber 400, one end of the inner circulation chamber 400 is also respectively communicated with the fresh air channel 100 and the fresh air bypass channel 14, the other end of the inner circulation chamber 400 is also communicated with the fresh air outlet 7, and the inner circulation air valve 9 can control the inner circulation air inlet 8 to be opened or closed. The invention also can introduce indoor air flow into the internal circulation chamber through the internal circulation air inlet, and control the opening and closing of the channel through the internal circulation air valve, one end of the internal circulation chamber is communicated with the fresh air channel or the fresh air bypass channel, the fresh air can be sucked from the fresh air channel or the fresh air bypass channel, and the fresh air and/or indoor internal circulating air can be discharged to the room through the fresh air outlet, so that the effect that the fresh air is introduced into the room and the internal circulating air is continuously returned to the room is effectively completed.
In some embodiments, the air flow of the internal circulation air inlet 8 is further provided with an internal circulation filter 10 at the downstream end,
a fresh air fan 6 and a heat exchanger 5 are arranged in the internal circulation chamber 400, and the fresh air outlet 7 is communicated with the room;
the inner circulation chamber 400 is also provided with a temperature and humidity sensor 3 and a carbon dioxide sensor 4; the fresh air conditioner further comprises an electric controller 2.
The invention can filter and purify the air at the inner circulation inlet through the inner circulation filter arranged at the inner circulation inlet, can drive the air flow in the inner circulation chamber through the fresh air fan so as to drive the air flow to enter the room through the fresh air outlet, and can effectively exchange heat with the inner circulation air flow and/or outdoor fresh air through the heat exchanger so as to enter the room; the temperature and humidity of indoor air and the humidity of the indoor air can be effectively monitored through the fresh air temperature and humidity sensor and the carbon dioxide sensor, and the concentration of carbon dioxide in indoor air flow is monitored, so that whether the fresh air, the internal circulation air, the mixed air, the fresh air bypass or the fresh air bypass mode and other modes are controlled according to the temperature and humidity of the indoor air flow and the concentration of the carbon dioxide, and the indoor temperature and the concentration of the carbon dioxide meet the comfort requirements of human bodies.
As shown in fig. 7, the present invention further provides a control method of the fresh air conditioner according to any one of the foregoing, which includes:
a detection step of detecting the indoor carbon dioxide concentration C and the indoor environment temperature T Inner part And outdoor ambient temperature T Outer part ；
A judging step of judging a relationship between the carbon dioxide concentration C and the first and second set concentrations A and B and judging the outdoor environment temperature T Outer part And a third set temperature T 3 Relationship between them, determine the indoor environmental temperature T Inner part And a second set temperature T 2 Relationship between them and determination of outdoor ambient temperature T Outer part With indoor environment temperature T Inner part A relationship between;
a control step of controlling the outdoor environment temperature T according to the relation between the carbon dioxide concentration C and the first set concentration A and the second set concentration B respectively Outer part And a third set temperature T 3 Relationship between indoor ambient temperature T Inner part And a second set temperature T 2 Relationship between them and outdoor ambient temperature T Outer part With indoor environment temperature T Inner part And controlling the fresh air conditioner to execute one of a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode.
The control method of the fresh air conditioner can control the fresh air conditioner to execute any specific mode according to the carbon dioxide concentration, the indoor environment temperature and the outdoor environment temperature, so that any one of a full fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode can be operated according to the needs, and the fresh air can be exchanged for recovering energy, thereby effectively improving the indoor air quality and achieving good energy-saving effect; and the fresh air bypass function can reduce air flow windage without passing through a heat exchange core body when the indoor and outdoor temperature difference is small, thereby improving energy, improving the operation energy efficiency of the fresh air conditioner and improving efficiency.
In some embodiments, when the exhaust fan 1, the fresh air damper 17, the fresh air bypass damper 15, and the internal circulation damper 9 are included at the same time:
in the judging step, the judging condition 1 is C not less than A, and the judging condition 1 indicates that the concentration of carbon dioxide is too high;
the judgment condition 2 is that B is less than or equal to C and less than A, and the judgment condition 2 indicates that the concentration of carbon dioxide is higher but not very high;
the judgment condition 3 is-T 1 ≤T Outer part -T Inner part ≤T 1 The judging condition 3 shows that the indoor and outdoor temperature difference is smaller;
determination condition 4 is T Outer part ≤T 3 ，T 3 The third set temperature is used for judging the outdoor environment temperature, and the judging condition 4 indicates that the outdoor environment temperature is lower and the risk of icing the heat exchange core is caused;
determination condition 5 is T Outer part ＜T Inner part And T is Inner part ＞T 2 The method comprises the steps of carrying out a first treatment on the surface of the The judging condition 4 shows that the indoor space is very hot and is hotter than the outdoor space, and at the moment, the outdoor air can be used for directly refrigerating and cooling the indoor space, so that the energy efficiency of the system is improved;
in the control step, if the judging conditions 1 and 2 are not met, the exhaust fan 1 is controlled to be closed, the fresh air valve 17 is controlled to be closed, the fresh air side ventilation valve 15 is controlled to be closed, the internal circulation air valve 9 is opened, and an internal circulation mode is operated; (at the moment, the indoor carbon dioxide concentration is normal, fresh air is not used, and the indoor carbon dioxide is normally circulated);
when judging that the judging condition 1 is met and the judging condition 4 is met, controlling to close the internal circulation air valve 9, opening the fresh air valve 17, opening the fresh air side air valve 15, opening the exhaust fan 1 and operating a fresh air bypass mode; (at this time, fresh air is introduced, but the outdoor temperature is lower, and the core is easy to freeze, so that fresh air bypass is adopted to prevent icing);
when the judging condition 1 is met and the judging condition 5 is met, controlling to close the internal circulation air valve 9, opening the fresh air valve 17, opening the fresh air side air valve 15, opening the exhaust fan 1 and operating a fresh air bypass mode; (fresh air is needed at this time, because the indoor heat is outside, the indoor is refrigerated by the outdoor gas, and the energy efficiency of the system is improved);
when the judging condition 1 is met and the judging condition 3 is not met, controlling to close the internal circulation air valve 9, opening the fresh air valve 17, closing the fresh air side air valve 15, opening the exhaust fan 1 and operating a full heat exchange fresh air mode; (fresh air is needed at this time, but because the temperature difference between the indoor and the outdoor is large, the heat can be recovered by utilizing the total heat exchange core body, so that the energy efficiency of the system is improved);
when the judging condition 2 is met and the judging condition 3 is not met, controlling to open a fresh air valve 17, closing a fresh air side ventilation valve 15, opening the internal circulation air valve 9, opening the exhaust fan 1 and operating a mixing mode; (when the concentration of carbon dioxide is higher, fresh air is introduced, and the condition 3 is not satisfied, the indoor and outdoor temperature difference is large, and then total heat exchange is adopted, so that the energy efficiency of the system is improved);
wherein A is a first carbon dioxide concentration set value, B is a second carbon dioxide concentration set value, T 1 For the first set temperature value, T 2 For the second set temperature value, T 3 And a third set temperature value.
Preferably, A is 900-1100PPM, B is 600-900PPM, T 1 Take the value of 1-5 ℃ and T 2 The value is 26-30 ℃, T 3 The value is-30-0 ℃.
The novel fan has the technical scheme that the novel fan is provided with a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode, and the technical scheme of each operation mode is as follows:
total heat exchange fresh air mode: as shown in fig. 2, the fresh air bypass damper 15 and the internal circulation damper 9 are closed. Outdoor fresh air enters through a fresh air inlet 18 and is purified through a fresh air valve 17 and a fresh air filter 16, then is cooled or heated through a heat exchanger 5 through a heat exchange core 13, and is sent into a room through a pipeline after passing through a fresh air outlet 7 through a fresh air fan 6. At the same time, indoor air enters through the exhaust inlet 11, enters the heat exchange core 13 through the exhaust filter 12, and is discharged outdoors through a pipeline by the exhaust fan 1 through the exhaust outlet 19.
Mixing mode: as shown in fig. 3, on the basis of the total heat exchange fresh air operation mode, the internal circulation air valve 9 is opened according to air condition judgment, so that the fresh air and the indoor air are cooled or heated by the heat exchanger 5 after being mixed, and the fresh air is sent into the room through a pipeline after passing through the fresh air outlet 7 by the fresh air fan 6.
Internal circulation mode: as shown in fig. 4, the fresh air valve 17 is closed, the exhaust fan 1 is closed, the internal circulation air valve 9 and the fresh air fan 6 are opened, at this time, indoor air enters through the internal circulation air inlet 8, passes through the internal circulation air valve 9, is purified through the internal circulation filter 10, then is cooled or heated through the heat exchanger 5, and is sent into a room through a pipeline after passing through the fresh air outlet 7 by the fresh air fan 6.
Fresh air bypass mode: as shown in fig. 5, the internal circulation air valve 9 is closed, the unit fresh air valve 17 and the fresh air side air valve 15 are opened, outdoor fresh air enters through the fresh air inlet 18, passes through the fresh air valve 17, is purified through the fresh air filter 16, passes through the fresh air bypass channel 14 (the fresh air does not pass through the heat exchange core 13 due to the resistance effect), is cooled or heated through the heat exchanger 5, and is sent into a room through a pipeline after passing through the fresh air outlet 7 by the fresh air fan 6. At the same time, indoor air enters through the exhaust inlet 11, enters the heat exchange core 13 through the exhaust filter 12, and is discharged outdoors through a pipeline by the exhaust fan 1 through the exhaust outlet 19.
The operating mode control logic is as follows:
after starting up, the internal circulation air valve 9 is opened, the exhaust fan 1 is started, the fresh air fan 6 is started, and the carbon dioxide concentration in a room is detected by using the carbon dioxide sensor 4:
1) And if the indoor carbon dioxide concentration does not meet the judging conditions 1 and 2, the unit operates in an internal circulation mode. (at this time, the concentration of carbon dioxide in the room is normal, fresh air is not used, and the internal circulation is normal)
2) If the indoor carbon dioxide concentration meets the judging condition 1 and meets the judging condition 4 at the same time, the unit operates in a fresh air bypass mode; at the moment, fresh air is required to be introduced, but the outdoor temperature is lower, and the core body is easy to freeze, so that fresh air bypass is adopted to prevent icing
3) If the indoor carbon dioxide concentration meets the judging condition 1 and meets the judging condition 5 at the same time, the unit operates in a fresh air bypass mode; fresh air is required to be introduced, the indoor air is heated outdoors, and the indoor air is used for refrigerating, so that the energy efficiency is improved
4) If the indoor carbon dioxide concentration meets the judging condition 1 and does not meet the judging condition 3, the unit operates in a full heat exchange fresh air mode; fresh air is needed to be introduced, but the temperature difference between the indoor and the outdoor is large, and the total heat exchange core body can be utilized to recycle heat
5) If the indoor carbon dioxide concentration meets the condition 2 and does not meet the condition 3, the unit operates in a wind mixing mode, the carbon dioxide concentration is higher, fresh air is introduced, and the condition 3 is not met, so that the indoor and outdoor temperature difference is large, and then total heat exchange is adopted.
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. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. A fresh air conditioner which is characterized in that: comprising the following steps:
fresh air inlet (18), exhaust air inlet (11), exhaust air outlet (19), fresh air outlet (7) and heat exchange core (13), fresh air channel (100) and fresh air bypass channel (14), fresh air sucked through fresh air inlet (18) can enter fresh air channel (100) and exchange heat with exhaust air entering through exhaust air inlet (11) at heat exchange core (13), when outdoor temperature T is reached Outer part Less than a third preset temperature T 3 When the air conditioner is used, fresh air sucked through the fresh air inlet (18) can enter the fresh air bypass channel (14), air flow in the fresh air bypass channel (14) directly enters a room through the fresh air outlet (7) without heat exchange of the heat exchange core (13), and the length direction of the heat exchange core (13) is arranged along the width direction of the fresh air conditioner;
the air exhaust device further comprises an air exhaust chamber (200), wherein the air exhaust chamber (200) is communicated with the air exhaust inlet (11), the air exhaust outlet (19) is communicated with the air exhaust chamber (200), and an air exhaust fan (1) is further arranged at the air exhaust outlet (19);
the novel air conditioner further comprises a fresh air chamber (300), wherein the fresh air chamber (300) is communicated and arranged between the fresh air inlet (18) and the fresh air channel (100) or the fresh air bypass channel (14), one end of the fresh air chamber (300) is communicated with the fresh air inlet (18), and the other end of the fresh air chamber is communicated with the fresh air channel (100) or the fresh air bypass channel (14);
the novel air conditioner further comprises a fresh air valve (17) and a fresh air side ventilation valve (15), wherein the fresh air valve (17) can control the fresh air chamber (300) to be opened or closed, and the fresh air side ventilation valve (15) can control the fresh air bypass channel (14) to be opened or closed;
the air conditioner further comprises an inner circulation cavity (400), an inner circulation air inlet (8) and an inner circulation air valve (9), wherein the inner circulation air inlet (8) is communicated with the inner circulation cavity (400), one end of the inner circulation cavity (400) is also respectively communicated with the fresh air channel (100) and the fresh air bypass channel (14), the other end of the inner circulation cavity (400) is also communicated with the fresh air outlet (7), and the inner circulation air valve (9) can control the inner circulation air inlet (8) to be opened or closed;
a detection step of detecting the indoor carbon dioxide concentration C and the indoor environment temperature T Inner part And outdoor ambient temperature T Outer part ；
A judging step of judging a relationship between the carbon dioxide concentration C and the first and second set concentrations A and B and judging the outdoor environment temperature T Outer part And a third set temperature T 3 Relationship between them, determine the indoor environmental temperature T Inner part And a second set temperature T 2 Relationship between them and determination of outdoor ambient temperature T Outer part With indoor environment temperature T Inner part A relationship between;
a control step of controlling the outdoor environment temperature T according to the relation between the carbon dioxide concentration C and the first set concentration A and the second set concentration B respectively Outer part And a third set temperature T 3 Relationship between indoor ambient temperature T Inner part And a second set temperature T 2 Relationship between them and outdoor ambient temperature T Outer part With indoor environment temperature T Inner part The relation between the two modes is that the fresh air conditioner is controlled to execute one of a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode;
in the judging step, it is judged thatThe condition 1 is C not less than A, the condition 2 is B not less than C less than A, and the condition 3 is-T 1 ≤T Outer part -T Inner part ≤T 1 Determination condition 4 is T Outer part ≤T 3 Determination condition 5 is T Outer part ＜T Inner part And T is Inner part ＞T 2 ；
In the control step, if the judging conditions 1 and 2 are not met, the exhaust fan (1) is controlled to be closed, the fresh air valve (17) is controlled to be closed, the fresh air side ventilation valve (15) is closed, the internal circulation air valve (9) is opened, and an internal circulation mode is operated;
when judging that the judging condition 1 is met and the judging condition 4 is met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), opening a fresh air side air valve (15), opening the exhaust fan (1), and operating a fresh air bypass mode;
when the judging condition 1 is met and the judging condition 5 is met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), opening a fresh air side air valve (15), opening the exhaust fan (1), and operating a fresh air bypass mode;
when the judging condition 1 is met and the judging condition 3 is not met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), closing a fresh air side air valve (15), opening an exhaust fan (1), and operating a total heat exchange fresh air mode;
when the judging condition 2 is met and the judging condition 3 is not met, controlling to open a fresh air valve (17), closing a fresh air side ventilation valve (15), opening the internal circulation air valve (9), opening the exhaust fan (1), and operating a wind mixing mode;
wherein A is a first carbon dioxide concentration set value, B is a second carbon dioxide concentration set value, T 1 For the first set temperature value, T 2 For the second set temperature value, T 3 And a third set temperature value.
2. The fresh air conditioner according to claim 1, wherein:
the fresh air channel (100) can be communicated with the fresh air inlet (18), and the heat exchange core (13) is positioned in the fresh air channel (100) or in the exhaust chamber (200) and is in contact with the fresh air channel (100), so that the fresh air in the fresh air channel (100) and the exhaust air in the exhaust chamber (200) exchange heat at the heat exchange core (13);
the fresh air bypass channel (14) can be communicated with the fresh air inlet (18), and the heat exchange core (13) does not exchange heat with the fresh air bypass channel (14).
3. The fresh air conditioner according to claim 2, wherein:
the fresh air channel (100) is located in the exhaust chamber (200), the fresh air bypass channel (14) is also located in the exhaust chamber (200), the fresh air channel (100) is connected with the fresh air bypass channel (14), and the heat exchange core (13) is only in contact with the fresh air channel (100) for heat exchange.
4. A fresh air conditioner according to claim 2 or 3, wherein:
an exhaust filter (12) is further arranged at the exhaust inlet (11) to filter indoor exhaust air sucked by the exhaust inlet (11).
5. The fresh air conditioner according to any one of claims 1 to 4, wherein:
and a fresh air filter (16) is further arranged in the fresh air chamber (300).
6. The fresh air conditioner according to claim 1, wherein:
an inner circulation filter (10) is arranged at the downstream end of the air flow of the inner circulation air inlet (8),
a fresh air fan (6) and a heat exchanger (5) are arranged in the inner circulation chamber (400), and the fresh air outlet (7) is communicated with the room;
a temperature and humidity sensor (3) and a carbon dioxide sensor (4) are also arranged in the inner circulation chamber (400); the fresh air conditioner further comprises an electric controller (2).
7. The control method of a fresh air conditioner according to any one of claims 1 to 6, characterized in that: comprising the following steps:
a detection step of detecting the indoor carbon dioxide concentration C and the indoor environment temperature T Inner part And outdoor ambient temperature T Outer part ；
A judging step of judging a relationship between the carbon dioxide concentration C and the first and second set concentrations A and B and judging the outdoor environment temperature T Outer part And a third set temperature T 3 Relationship between them, determine the indoor environmental temperature T Inner part And a second set temperature T 2 Relationship between them and determination of outdoor ambient temperature T Outer part With indoor environment temperature T Inner part A relationship between;
a control step of controlling the outdoor environment temperature T according to the relation between the carbon dioxide concentration C and the first set concentration A and the second set concentration B respectively Outer part And a third set temperature T 3 Relationship between indoor ambient temperature T Inner part And a second set temperature T 2 Relationship between them and outdoor ambient temperature T Outer part With indoor environment temperature T Inner part And controlling the fresh air conditioner to execute one of a total heat exchange fresh air mode, a mixed air mode, an internal circulation mode and a fresh air bypass mode.
8. The control method according to claim 7, characterized in that:
when simultaneously comprising an exhaust fan (1), a fresh air valve (17), a fresh air side ventilation valve (15) and an internal circulation air valve (9):
in the judging step, the judging condition 1 is C more than or equal to A, the judging condition 2 is B more than or equal to C less than A, and the judging condition 3 is-T 1 ≤T Outer part -T Inner part ≤T 1 Determination condition 4 is T Outer part ≤T 3 Determination condition 5 is T Outer part ＜T Inner part And T is Inner part ＞T 2 ；
In the control step, if the judging conditions 1 and 2 are not met, the exhaust fan (1) is controlled to be closed, the fresh air valve (17) is controlled to be closed, the fresh air side ventilation valve (15) is closed, the internal circulation air valve (9) is opened, and an internal circulation mode is operated;
when judging that the judging condition 1 is met and the judging condition 4 is met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), opening a fresh air side air valve (15), opening the exhaust fan (1), and operating a fresh air bypass mode;
when the judging condition 1 is met and the judging condition 5 is met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), opening a fresh air side air valve (15), opening the exhaust fan (1), and operating a fresh air bypass mode;
when the judging condition 1 is met and the judging condition 3 is not met, controlling to close an internal circulation air valve (9), opening a fresh air valve (17), closing a fresh air side air valve (15), opening an exhaust fan (1), and operating a total heat exchange fresh air mode;
when the judging condition 2 is met and the judging condition 3 is not met, controlling to open a fresh air valve (17), closing a fresh air side ventilation valve (15), opening the internal circulation air valve (9), opening the exhaust fan (1), and operating a wind mixing mode;
wherein A is a first carbon dioxide concentration set value, B is a second carbon dioxide concentration set value, T 1 For the first set temperature value, T 2 For the second set temperature value, T 3 And a third set temperature value.
9. The control method according to claim 8, characterized in that:
a takes on 900-1100PPM, B takes on 600-900PPM, T 1 Take the value of 1-5 ℃ and T 2 The value is 26-30 ℃, T 3 The value is-30-0 ℃.
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| CN115875780A (en) * | 2022-11-11 | 2023-03-31 | 珠海格力电器股份有限公司 | Fresh air handling unit and control method thereof |
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| CN107202411A (en) * | 2017-06-23 | 2017-09-26 | 深圳大然新风科技有限公司 | Fresh air output switching control method and VMC in new blower fan |
| CN109163395A (en) * | 2018-08-31 | 2019-01-08 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN110715364A (en) * | 2019-10-14 | 2020-01-21 | 珠海格力电器股份有限公司 | Air treatment equipment and control method and device thereof |
| CN111140976A (en) * | 2020-01-17 | 2020-05-12 | 珠海格力电器股份有限公司 | Fresh air conditioning system and control method thereof |
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