CN107514749B - Multi-split fresh air system, control method thereof and computer readable storage medium - Google Patents
Multi-split fresh air system, control method thereof and computer readable storage medium Download PDFInfo
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- CN107514749B CN107514749B CN201710726488.XA CN201710726488A CN107514749B CN 107514749 B CN107514749 B CN 107514749B CN 201710726488 A CN201710726488 A CN 201710726488A CN 107514749 B CN107514749 B CN 107514749B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a multi-connected fresh air system, a control method thereof and a computer readable storage medium, wherein the system comprises an outdoor unit and a plurality of indoor units, each indoor unit comprises a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, and the method comprises the following steps: acquiring a set operation mode of a system; if the set operation mode of the system is a cooling/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed; acquiring the air inlet temperatures of running indoor units, and controlling the outdoor unit to start refrigeration if one of the air inlet temperatures is higher than a preset temperature and the set running mode of the system is a refrigeration mode; and if one of the inlet air temperatures is lower than or equal to the preset temperature and the set operation mode of the system is a heating mode, controlling the outdoor unit to start heating.
Description
Technical Field
The invention relates to the technical field of multi-split fresh air systems, in particular to a control method of a multi-split fresh air system, a computer readable storage medium and the multi-split fresh air system.
Background
Currently, there are four ways to provide a fresh air system: 1. an indoor unit and an outdoor unit are used for providing a fresh air solution in a traditional air conditioner mode, 2, a total heat exchanger is used for providing a fresh air solution, 3, the mode 1 and the mode 2 are overlapped to provide fresh air, and 4, the tail end of a water machine is used for providing a fresh air solution.
Among them, the 1 st mode is the current mainstream solution, and the main problem of the scheme is that the fresh air efficiency is very low when the outdoor temperature is very high or very low (for example, higher than 40 degrees or lower than-5 degrees), or even the fresh air cannot be provided; in the 2 nd mode, heat is exchanged by air convection, so that the fresh air efficiency is low and the influence of indoor and outdoor temperature difference is large; the 3 rd mode can properly improve the fresh air efficiency of the mode 1, but is greatly influenced by the outdoor temperature; the 4 th mode is influenced by the temperature of the outlet water, and the dehumidification efficiency of the fresh air machine is poor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above.
Therefore, the first objective of the present invention is to provide a control method for a multi-connected fresh air system, which can improve the power saving efficiency of the multi-connected fresh air system through the relatively stable indoor ambient temperature during the cooling/heating process, and at the same time, because the fluctuation range of the indoor air temperature is much smaller than the fluctuation range of the outdoor ambient temperature, the fresh air system can be operated for 24 hours all day long without shutdown all the year round.
A second object of the invention is to propose a computer-readable storage medium.
The third purpose of the invention is to provide a multi-connected fresh air system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for a multi-connected fresh air system, where the multi-connected fresh air system includes an outdoor unit and a plurality of indoor units, each indoor unit includes a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, the exhaust motor is disposed corresponding to the first heat exchanger, and the air supply motor is disposed corresponding to the second heat exchanger, and the control method includes the following steps: acquiring a set operation mode of the multi-connected fresh air system; if the set operation mode of the multi-connected fresh air system is a refrigerating/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed; acquiring the air inlet temperature of the running indoor unit, and judging whether each air inlet temperature is less than or equal to a preset temperature; if one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the outdoor unit to start refrigeration; and if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a heating mode, controlling the outdoor unit to start heating.
According to the control method of the multi-connected fresh air system provided by the embodiment of the invention, firstly, a set operation mode of the multi-connected fresh air system is obtained, if the set operation mode of the multi-connected fresh air system is a cooling/heating mode, an air supply motor of an operating indoor unit in a plurality of indoor units is controlled to operate at a first preset rotating speed, an air exhaust motor of the operating indoor unit in the plurality of indoor units is controlled to operate at a second preset rotating speed, then, the air inlet temperature of the operating indoor unit is obtained, whether each air inlet temperature is smaller than or equal to a preset temperature is judged, if one air inlet temperature in the operating indoor unit is larger than the preset temperature and the set operation mode of the multi-connected fresh air system is a cooling mode, the outdoor unit is controlled to start cooling, if one air inlet temperature in the operating indoor unit is smaller than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the method is used for refrigerating/heating, the electricity-saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air system can be operated for 24 hours all day long without stopping all the year round.
In addition, the control method of the multi-connected fresh air system provided by the embodiment of the invention also has the following additional technical characteristics:
in an embodiment of the present invention, the control method of the multi-split type fresh air system further includes: if the set operation mode of the multi-connected fresh air system is a ventilation mode, controlling the outdoor unit to be in a shutdown state, and controlling an air supply motor and an air exhaust motor of an operating indoor unit in the plurality of indoor units to operate at the first preset rotating speed; if the set operation mode of the multi-connected fresh air system is an air supply mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at the first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed; and if the set operation mode of the multi-connected fresh air system is an air exhaust mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed.
In an embodiment of the present invention, each indoor unit further includes a throttling component, a first solenoid valve, and a second solenoid valve, wherein the first port of the first heat exchanger is communicated to the first port of the second heat exchanger through the throttling component, the second port of the first heat exchanger is connected to the first solenoid valve, and the second port of the second heat exchanger is connected to the second solenoid valve.
In an embodiment of the present invention, the control method of the multi-split type fresh air system further includes: if the set operation mode of the multi-connected fresh air system is a refrigeration mode, controlling a first electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state; and if the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state.
In an embodiment of the present invention, the control method of the multi-split type fresh air system further includes: if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed; and if one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed.
In order to achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium having instructions stored therein, where when the instructions are executed, the multi-split fresh air system executes the control method of the multi-split fresh air system.
According to the computer readable storage medium of the embodiment of the invention, firstly, a set operation mode of the multi-connected fresh air system is obtained, if the set operation mode of the multi-connected fresh air system is a cooling/heating mode, an air supply motor of an operating indoor unit in a plurality of indoor units is controlled to operate at a first preset rotating speed, an air exhaust motor of the operating indoor unit in the plurality of indoor units is controlled to operate at a second preset rotating speed, then, the air inlet temperature of the operating indoor unit is obtained, whether each air inlet temperature is less than or equal to a preset temperature is judged, if one air inlet temperature in the operating indoor unit is greater than the preset temperature and the set operation mode of the multi-connected fresh air system is a cooling mode, the outdoor unit is controlled to start cooling, if one air inlet temperature in the operating indoor unit is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the multi-connected fresh air system is used for refrigerating/heating, the electricity-saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air fan system can be operated for 24 hours all day long without stopping all the year round.
In order to achieve the above object, a third embodiment of the present invention provides a multi-connected fresh air system, including: an outdoor unit; each indoor unit comprises a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, wherein the exhaust motor is arranged corresponding to the first heat exchanger, and the air supply motor is arranged corresponding to the second heat exchanger; a control module to: acquiring a set operation mode of the multi-connected fresh air system; when the set operation mode of the multi-connected fresh air system is a refrigerating/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed; acquiring the air inlet temperature of the running indoor unit, and judging whether each air inlet temperature is less than or equal to a preset temperature; when judging that one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the outdoor unit to start refrigeration; and when one of the air inlet temperatures of the running indoor units is judged to be lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a heating mode, controlling the outdoor unit to be heated and started.
According to the multi-connected fresh air system of the embodiment of the invention, the control module firstly obtains the set operation mode of the multi-connected fresh air system, if the set operation mode of the multi-connected fresh air system is the cooling/heating mode, the control module controls the air supply motor of the running indoor unit in the indoor units to run at the first preset rotating speed, controls the air exhaust motor of the running indoor unit in the indoor units to run at the second preset rotating speed, then obtains the air inlet temperature of the running indoor unit, judges whether each air inlet temperature is less than or equal to the preset temperature, controls the outdoor unit to start cooling if one air inlet temperature in the air inlet temperatures of the running indoor units is greater than the preset temperature and the set operation mode of the multi-connected fresh air system is the cooling mode, controls the outdoor unit to start cooling if one air inlet temperature in the air inlet temperatures of the running indoor units is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the multi-connected fresh air system is used for refrigerating/heating, the electricity saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air system can be operated for 24 hours in all weather and without shutdown all the year round.
In addition, the multi-connected fresh air system provided by the embodiment of the invention can also have the following additional technical characteristics:
in an embodiment of the present invention, the control module is further configured to: when the set operation mode of the multi-connected fresh air system is a ventilation mode, controlling the outdoor unit to be in a shutdown state, and controlling an air supply motor and an air exhaust motor of an operating indoor unit in the plurality of indoor units to operate at the first preset rotating speed; when the set operation mode of the multi-connected fresh air system is an air supply mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at the first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed; and when the set operation mode of the multi-connected fresh air system is an air exhaust mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed.
In an embodiment of the present invention, each indoor unit further includes a throttling component, a first solenoid valve, and a second solenoid valve, wherein the first port of the first heat exchanger is communicated to the first port of the second heat exchanger through the throttling component, the second port of the first heat exchanger is connected to the first solenoid valve, and the second port of the second heat exchanger is connected to the second solenoid valve.
In an embodiment of the present invention, the control module is further configured to: when the set operation mode of the multi-connected fresh air system is a refrigeration mode, controlling a first electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state; and when the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state.
In an embodiment of the present invention, the control module is further configured to: when one of the air inlet temperatures of the running indoor units is judged to be lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed; and when one of the air inlet temperatures of the running indoor units is judged to be higher than the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed.
Drawings
Fig. 1 is a schematic structural diagram of a multi-connected fresh air system according to an embodiment of the present invention.
Fig. 2 is a flowchart of a control method of a multi-connected fresh air system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a control method of a multi-connected fresh air system, a computer-readable storage medium, and a multi-connected fresh air system according to an embodiment of the present invention with reference to the accompanying drawings.
In an embodiment of the present invention, the multi-connected fresh air system may include an outdoor unit and a plurality of indoor units, each indoor unit may include a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, the exhaust motor is disposed corresponding to the first heat exchanger, the air supply motor is disposed corresponding to the second heat exchanger, and the outdoor unit may include a compressor.
In an embodiment of the present invention, each indoor unit may further include a throttling part, a first solenoid valve, and a second solenoid valve, wherein the first port of the first heat exchanger is communicated to the first port of the second heat exchanger through the throttling part, the second port of the first heat exchanger is connected to the first solenoid valve, and the second port of the second heat exchanger is connected to the second solenoid valve.
As a specific example, as shown in fig. 1, the multi-type fresh air system may include an outdoor unit 10 and a plurality of indoor units 20. The outdoor unit 10 may include a compressor 11, a four-way valve 12, and a gas-liquid separator 13, and each of the plurality of indoor units 20 may include a first heat exchanger 21, a second heat exchanger 22, a discharge motor 23, a supply motor 24, a throttling part 25, a first solenoid valve 26, and a second solenoid valve 27.
Wherein, the first port of the four-way valve 12 is connected with the exhaust outlet of the compressor 11, the second port of the four-way valve 12 is connected with the first port of the first electromagnetic valve 26, the third port of the four-way valve 12 is connected with the inlet of the gas-liquid separator 13, the fourth port of the four-way valve 12 is connected with the first port of the second electromagnetic valve 27, the air inlet of the compressor 11 is connected with the outlet of the gas-liquid separator 13, the second port of the first electromagnetic valve 26 is connected with the second port of the first heat exchanger 21, the first port of the first heat exchanger 21 is communicated with the first port of the second heat exchanger 22 through the throttling component 25, the second port of the second heat exchanger 22 is connected with the second port of the second electromagnetic valve 27, the air exhaust motor 23 is arranged corresponding to the first heat exchanger 21, and the air supply motor 24. It should be noted that a first fan assembly including a duct, a filter, and the like (not shown in fig. 1) is provided around the exhaust motor 23 and the first heat exchanger 21, and a second fan assembly including a duct, a filter, and the like (not shown in fig. 1) is provided around the supply motor 24 and the second heat exchanger 22.
When the multi-connected fresh air system operates in the refrigeration mode, as shown in fig. 1, the refrigerant in the pipeline of the multi-connected fresh air system is compressed and discharged by the compressor 11, and then enters the first heat exchanger 21 through the four-way valve 12 and the first electromagnetic valve 26, the first heat exchanger 21 (i.e., the first heat exchanger 21 at this time is used as a condenser) dissipates the heat of the high-temperature and high-pressure gaseous refrigerant coming out of the compressor, the dissipated refrigerant is throttled and depressurized by the throttling component 25, and then enters the second heat exchanger 22 (i.e., the second heat exchanger 22 at this time is used as an evaporator) to evaporate and absorb the heat to form a low-temperature and low-pressure gaseous refrigerant, and then the low-temperature and low-pressure gaseous refrigerant returns to the.
When the multi-connected fresh air system operates in the heating mode, as shown in fig. 1, the refrigerant in the pipeline of the multi-connected fresh air system is compressed and discharged by the compressor 11, and then enters the second heat exchanger 22 through the four-way valve 12 and the second electromagnetic valve 27, the second heat exchanger 22 (i.e., the second heat exchanger 22 at this time is used as a condenser) dissipates the heat of the high-temperature and high-pressure gaseous refrigerant coming out of the compressor, the dissipated refrigerant is throttled and depressurized by the throttling component 25, and then enters the first heat exchanger 21 (i.e., the first heat exchanger 21 at this time is used as an evaporator) to evaporate and absorb the heat to form a low-temperature and low-pressure gaseous refrigerant, and then the low-temperature and low-pressure gaseous refrigerant returns to the compressor.
Fig. 2 is a flowchart of a control method of a multi-connected fresh air system according to an embodiment of the present invention.
As shown in fig. 2, the control method of the multi-connected fresh air system according to the embodiment of the present invention includes the following steps:
and S1, acquiring the set operation mode of the multi-connected fresh air system. The operation modes can include cooling, heating, air supply, air exhaust, ventilation and the like.
And S2, if the set operation mode of the multi-connected fresh air system is a cooling/heating mode, controlling the air supply motor of the running indoor unit in the indoor units to run at a first preset rotation speed, and controlling the air exhaust motor of the running indoor unit in the indoor units to run at a second preset rotation speed.
The first preset rotating speed and the second preset rotating speed can be calibrated according to actual conditions, for example, the first preset rotating speed can be a rotating speed corresponding to a rotating speed gear set by a user, and the second preset rotating speed can be generated by the multi-connected fresh air system according to the rotating speed gear set by the user, or obtained from a corresponding relation table of a prestored rotating speed gear and the second preset rotating speed according to the rotating speed gear set by the user.
And S3, acquiring the air inlet temperature of the running indoor unit, and judging whether each air inlet temperature is less than or equal to the preset temperature. The preset temperature may be calibrated according to actual conditions, for example, the preset temperature may be a temperature set by a user (i.e., an indoor temperature set by the user through a remote controller or a mobile terminal).
Specifically, the air inlet temperature of the running indoor unit can be obtained through a temperature sensor arranged at the air inlet of the indoor unit, and whether each air inlet temperature is smaller than or equal to the preset temperature or not is judged.
And S4, if one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is the refrigeration mode, controlling the outdoor unit to start refrigeration.
Specifically, the multi-connected fresh air system receives a control instruction input by a user, and if the received operation mode of the multi-connected fresh air system is determined to be a refrigeration mode according to the control instruction, the air supply motor of the running indoor unit in the indoor units can be controlled to run at the rotating speed of the rotating speed gear set by the user, and the air exhaust motor of the running indoor unit in the indoor units is controlled to run at a second preset rotating speed.
Then, the multi-connected fresh air system acquires the inlet air temperature of the running indoor unit, judges that each inlet air temperature is higher than the respective set temperature, and controls the outdoor unit to start refrigeration if one inlet air temperature is higher than the corresponding set temperature in the inlet air temperatures of the running indoor unit (namely, the multi-connected fresh air system controls the compressor in the outdoor unit to start, and controls the four-way valve to enable the high-temperature and high-pressure gaseous refrigerant discharged by compression to enter the first heat exchanger first).
It should be noted that, as shown in fig. 1, when the multi-split type fresh air system operates in the cooling mode, the first fan assembly disposed around the exhaust motor 23 and the first heat exchanger 21 sucks in the dirty air in the room, and the dirty air flows to the second heat exchanger 22 through the air duct (not shown in fig. 1) after being subjected to heat dissipation by the first heat exchanger 21 and filtering by the first fan assembly. Then, the second fan assembly disposed around the air supply motor 24 and the second heat exchanger 22 supplies the filtered indoor air (fresh air) to the user through the fresh air outlet (i.e., enters the room through the fresh air outlet).
And S5, if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the outdoor unit to start heating.
Specifically, the multi-connected fresh air system receives a control instruction input by a user, and if the received operation mode of the multi-connected fresh air system is determined to be a heating mode according to the control instruction, the air supply motor of the running indoor unit in the indoor units can be controlled to run at the rotating speed of the rotating speed gear set by the user, and the air exhaust motor of the running indoor unit in the indoor units is controlled to run at a second preset rotating speed.
Then, the multi-connected fresh air system acquires the inlet air temperature of the running indoor unit, judges that each inlet air temperature is less than or equal to the respective set temperature, and controls the outdoor unit to start heating if one inlet air temperature is less than or equal to the set temperature in the inlet air temperatures of the running indoor units (namely, the multi-connected fresh air system controls the compressor in the outdoor unit to start, and controls the four-way valve to enable the high-temperature and high-pressure gaseous refrigerant discharged by compression to enter the second heat exchanger first).
It should be noted that, as shown in fig. 1, when the multi-split type fresh air system operates in the heating mode, the first fan assembly disposed around the exhaust motor 23 and the first heat exchanger 21 sucks in the indoor dirty air, and the dirty air is filtered by the first fan assembly and then flows to the second heat exchanger 22 through the air duct (not shown in fig. 1). Then, the second heat exchanger dispels the heat to the indoor wind (new trend) after filtering, then will pass through the second fan subassembly that sets up around air supply motor 24 and second heat exchanger 22 through the new trend export with the new trend through heat absorption and provide the user.
Further, if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature, and the set running mode of the multi-connected fresh air system is the refrigeration mode, it indicates that the temperature of the room where the indoor unit is located corresponding to the air inlet temperature is lower than or equal to the temperature set by the user, and at this time, the room does not need to be continuously refrigerated, so that the multi-connected fresh air system can control the first electromagnetic valve of the indoor unit corresponding to the air inlet temperature to be closed, so that the refrigerant cannot enter the indoor unit (that is, the indoor unit cannot continuously refrigerate). Meanwhile, in order to continuously purify the air in the room, the power transmission fan and the exhaust motor of the indoor unit corresponding to the inlet air temperature can be controlled to operate at a first preset rotating speed so as to achieve the purpose of ventilating and purifying the indoor air.
It should be noted that the outdoor unit and the indoor units of the multi-split fresh air system can be in communication connection in a wireless or wired manner, and the outdoor unit can comprehensively calculate the operating frequency of the compressor according to the parameters of the indoor units. For example, when the outdoor unit receives the parameter that the first electromagnetic valve of the indoor unit in the room is closed, the operating frequency of the compressor can be controlled to be properly reduced, so that the output of the refrigerant is reduced, and the energy consumption of the multi-connection fresh air system is further reduced.
In addition, if one of the air inlet temperatures of the running indoor units is higher than the preset temperature, and the set running mode of the multi-connected fresh air system is the heating mode, it indicates that the temperature of the room where the indoor unit corresponding to the air inlet temperature is located is higher than the temperature set by the user, and at this time, the room does not need to be heated continuously, so that the multi-connected fresh air system can control the second electromagnetic valve of the indoor unit corresponding to the air inlet temperature to be closed, so that the refrigerant cannot enter the indoor unit (that is, the indoor unit cannot heat continuously). Meanwhile, in order to continuously purify the air in the room, the power transmission fan and the exhaust motor of the indoor unit corresponding to the inlet air temperature can be controlled to operate at a first preset rotating speed so as to achieve the purpose of ventilating and purifying the indoor air.
In the embodiment of the invention, the first heat exchanger and the second heat exchanger can be arranged indoors or near the indoor side, namely, the heat source carriers of the first heat exchanger and the second heat exchanger are induced by indoor air, the electricity-saving efficiency of the fresh air fan is improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than the fluctuation range of the outdoor environment temperature (the indoor temperature range is 10-32 ℃ generally, and the outdoor temperature range in the north of China is-25-43 ℃), so that the energy consumption in the whole year season is reduced, and the use season range of the product is extended.
For example, if the indoor ambient temperature ranges from 10 ℃ to 32 ℃ and the outdoor ambient temperature ranges from-25 ℃ to 43 ℃, when the multi-connected fresh air system operates in the cooling mode, the first heat exchanger and the fan thereof exchange heat with air higher than 32 ℃, the energy consumption of the whole machine can be increased by about 25%, and the system can be automatically shut down for protection when the outdoor ambient temperature is too high or too low, so as to protect the safety of the system. When the multi-connected fresh air system operates in a heating mode, the energy consumption of the whole machine can be improved by about 35% when the second heat exchanger and air of the second heat exchanger exchange heat with air at the temperature lower than 10 ℃, and the system can be automatically shut down for protection when the outdoor environment temperature is too high or too low, so that the safety of the system is protected.
In summary, the control method of the multi-connected fresh air system provided in the embodiment of the present invention can improve the power saving efficiency of the multi-connected fresh air system through the relatively stable indoor ambient temperature during the cooling/heating, and at the same time, the fluctuation range of the indoor air temperature is much smaller than the fluctuation range of the outdoor ambient temperature, so that the fresh air system can operate around the clock for 24 hours without stopping the machine all the year round.
In addition, in an embodiment of the present invention, the control method of the multi-split fresh air system further includes: and if the set operation mode of the multi-connected fresh air system is the ventilation mode, controlling the outdoor unit to be in a stop state, and controlling the air supply motor and the air exhaust motor of the running indoor unit in the indoor units to run at a first preset rotating speed.
Specifically, the multi-connected fresh air system receives a control instruction input by a user, and if the received operation mode of the multi-connected fresh air system is determined to be a ventilation mode according to the control instruction, the outdoor unit is controlled to be in a stop state, and an air supply motor and an air exhaust motor of an operating indoor unit in the plurality of indoor units are controlled to operate at a first preset rotating speed so as to achieve the purpose of ventilation. It should be noted that ventilation does not require cooling or heating, and thus does not require the operation of the outdoor unit.
And if the set operation mode of the multi-connected fresh air system is the air supply mode, controlling the outdoor unit to be in a stop state, controlling the air supply motor of the running indoor unit in the indoor units to run at a first preset rotating speed, and controlling the air exhaust motor of the running indoor unit in the indoor units to run at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed. The third preset rotation speed may be calibrated according to actual conditions, for example, the third preset rotation speed may be obtained by subtracting a fixed rotation speed from the first preset rotation speed, where the fixed rotation speed may be obtained through a lot of experiments by a manufacturer of the multi-type fresh air system.
Specifically, the multi-connected fresh air system receives a control instruction input by a user, and if the received operation mode of the multi-connected fresh air system is determined to be an air supply mode according to the control instruction, the outdoor unit is controlled to be in a stop state, an air supply motor of an operating indoor unit in the indoor units is controlled to operate at a first preset rotating speed, and an air exhaust motor of the operating indoor unit in the indoor units is controlled to operate at a third preset rotating speed, so that the air supply purpose is achieved. It should be noted that the air supply does not require cooling or heating, and therefore, the operation of the outdoor unit does not need to be started.
And if the set operation mode of the multi-connected fresh air system is the air exhaust mode, controlling the outdoor unit to be in a stop state, controlling the air supply motor of the running indoor unit in the indoor units to run at a first preset rotating speed, and controlling the air exhaust motor of the running indoor unit in the indoor units to run at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed. The fourth preset rotation speed may be calibrated according to an actual situation, for example, the fourth preset rotation speed may be a rotation speed obtained by adding the first preset rotation speed to the fixed rotation speed.
Specifically, the multi-connected fresh air system receives a control instruction input by a user, if the received operation mode of the multi-connected fresh air system is determined to be an air exhaust mode according to the control instruction, the outdoor unit is controlled to be in a stop state, the air supply motor of the indoor unit which is in operation in the plurality of indoor units is controlled to operate at a first preset rotating speed, and the air exhaust motor of the indoor unit which is in operation in the plurality of indoor units is controlled to operate at a fourth preset rotating speed so as to achieve the aim of air exhaust. It should be noted that the discharge air does not need to be cooled or heated, and therefore, the outdoor unit does not need to be started to operate.
It should be noted that the rotation speed and the air volume setting of the first heat exchanger and the exhaust motor described in the above embodiments can be adjusted according to the new air setting mode, the target air volume of the first heat exchanger and the exhaust motor in the exhaust mode is greater than the new air volume, the target air volume of the first heat exchanger and the exhaust motor in the air supply mode is less than the new air volume, and the target air volume of the first heat exchanger and the exhaust motor in other modes is equal to the new air volume to ensure the balance of the indoor static pressure.
In order to prevent the refrigerant from flowing into the indoor unit in the closed state among the plurality of indoor units to perform heat exchange when the multi-split fresh air system operates in the cooling/heating mode, in an embodiment of the present invention, the method for controlling the multi-split fresh air system may further include controlling the first electromagnetic valve of the indoor unit in the closed state among the plurality of indoor units to be in the closed state if the set operation mode of the multi-split fresh air system is the cooling mode. And if the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of the indoor unit in a closed state in the plurality of indoor units to be in a closed state.
In summary, according to the control method of the multi-connected fresh air system of the embodiment of the present invention, a set operation mode of the multi-connected fresh air system is first obtained, if the set operation mode of the multi-connected fresh air system is a cooling/heating mode, an air supply motor of an operating indoor unit of the plurality of indoor units is controlled to operate at a first preset rotation speed, an air exhaust motor of an operating indoor unit of the plurality of indoor units is controlled to operate at a second preset rotation speed, then an air intake temperature of the operating indoor unit is obtained, and whether each air intake temperature is less than or equal to a preset temperature is determined, if one air intake temperature of the operating indoor unit is greater than the preset temperature and the set operation mode of the multi-connected fresh air system is a cooling mode, the outdoor unit is controlled to start cooling, if one air intake temperature of the operating indoor unit is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the method is used for refrigerating/heating, the electricity-saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air system can be operated for 24 hours all day long without stopping all the year round.
In order to achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium having instructions stored therein, where when the instructions are executed, the multi-split fresh air system executes the control method of the multi-split fresh air system.
According to the computer readable storage medium of the embodiment of the invention, firstly, a set operation mode of the multi-connected fresh air system is obtained, if the set operation mode of the multi-connected fresh air system is a cooling/heating mode, an air supply motor of an operating indoor unit in a plurality of indoor units is controlled to operate at a first preset rotating speed, an air exhaust motor of the operating indoor unit in the plurality of indoor units is controlled to operate at a second preset rotating speed, then, the air inlet temperature of the operating indoor unit is obtained, whether each air inlet temperature is less than or equal to a preset temperature is judged, if one air inlet temperature in the operating indoor unit is greater than the preset temperature and the set operation mode of the multi-connected fresh air system is a cooling mode, the outdoor unit is controlled to start cooling, if one air inlet temperature in the operating indoor unit is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the multi-connected fresh air system is used for refrigerating/heating, the electricity-saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air fan system can be operated for 24 hours all day long without stopping all the year round.
A multi-split system according to an embodiment of the present invention will be described in detail below.
Fig. 1 is a schematic structural diagram of a multi-connected fresh air system according to an embodiment of the present invention. As shown in fig. 1, the multi-connected fresh air system includes: an outdoor unit 10, a plurality of indoor units 20, and a control module (not specifically shown).
The outdoor unit 10 may include a compressor 11, a four-way valve 12, and a gas-liquid separator 13, and each of the plurality of indoor units 20 may include a first heat exchanger 21, a second heat exchanger 22, a discharge motor 23, a blowing motor 24, a throttling member 25, a first solenoid valve 26, and a second solenoid valve 27. A first port of the four-way valve 12 is connected with an exhaust port of the compressor 11, a second port of the four-way valve 12 is connected with a first port of a first electromagnetic valve 26, a third port of the four-way valve 12 is connected with an inlet of the gas-liquid separator 13, a fourth port of the four-way valve 12 is connected with a first port of a second electromagnetic valve 27, an air inlet of the compressor is connected with an outlet of the gas-liquid separator 13, a second port of the first electromagnetic valve 26 is connected with a second port of the first heat exchanger 21, the first port of the first heat exchanger 21 is communicated with a first port of the second heat exchanger 22 through a throttling component 25, the second port of the second heat exchanger 22 is connected with a second port of the second electromagnetic valve 27, the exhaust motor 23 is arranged corresponding to the first heat exchanger 21, and the air supply motor 24 is. It should be noted that a first fan assembly including a duct, a filter, and the like (not shown in fig. 1) is provided around the exhaust motor 23 and the first heat exchanger 21, and a second fan assembly including a duct, a filter, and the like (not shown in fig. 1) is provided around the supply motor 24 and the second heat exchanger 22.
The control module is used for obtaining a set operation mode of the multi-connected fresh air system, if the set operation mode of the multi-connected fresh air system is a refrigerating/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed, then obtaining air inlet temperatures of the operating indoor units, judging whether each air inlet temperature is less than or equal to a preset temperature, if one air inlet temperature in the air inlet temperatures of the operating indoor units is greater than the preset temperature, and the set operation mode of the multi-connected fresh air system is a refrigerating mode, controlling the outdoor unit to start refrigerating, if one air inlet temperature in the air inlet temperatures of the operating indoor units is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, the outdoor unit is controlled to start heating.
In an embodiment of the present invention, the control module is further configured to control the outdoor unit to be in a shutdown state when the set operation mode of the multi-connected fresh air system is the ventilation mode, and control the air supply motor and the air exhaust motor of the operating indoor unit of the plurality of indoor units to operate at a first preset rotation speed; when the set operation mode of the multi-connected fresh air system is an air supply mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed; when the set operation mode of the multi-connected fresh air system is the air exhaust mode, the outdoor unit is controlled to be in a stop state, the air supply motor of the indoor unit which is in operation in the indoor units is controlled to operate at a first preset rotating speed, and the air exhaust motor of the indoor unit which is in operation in the indoor units is controlled to operate at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed.
In an embodiment of the present invention, the control module is further configured to control a first electromagnetic valve of an indoor unit in a closed state among the plurality of indoor units to be in a closed state when a set operation mode of the multi-split type fresh air system is a cooling mode; and when the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of the indoor unit in a closed state in the plurality of indoor units to be in a closed state.
In an embodiment of the present invention, the control module is further configured to control the power transmission fan and the exhaust motor of the indoor unit corresponding to an air inlet temperature to operate at a first preset rotation speed when it is determined that one of the air inlet temperatures of the operating indoor units is lower than or equal to a preset temperature and a set operation mode of the multi-split fresh air system is a cooling mode; and when one of the inlet air temperatures of the running indoor units is judged to be higher than the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the power transmission fan and the exhaust motor of the indoor unit corresponding to the inlet air temperature to run at a first preset rotating speed.
It should be noted that, for details that are not disclosed in the multi-split type fresh air system of the embodiment of the present invention, please refer to details that are disclosed in the control method of the multi-split type fresh air system of the embodiment of the present invention, and detailed descriptions thereof are omitted here.
To sum up, according to the multi-connected fresh air system of the embodiment of the present invention, the control module first obtains the set operation mode of the multi-connected fresh air system, if the set operation mode of the multi-connected fresh air system is the cooling/heating mode, the control module controls the air supply motor of the operating indoor unit of the plurality of indoor units to operate at the first preset rotation speed, controls the air exhaust motor of the operating indoor unit of the plurality of indoor units to operate at the second preset rotation speed, then obtains the air intake temperature of the operating indoor unit, and determines whether each air intake temperature is less than or equal to the preset temperature, if one air intake temperature of the operating indoor unit is greater than the preset temperature, and the set operation mode of the multi-connected fresh air system is the cooling mode, controls the outdoor unit to start cooling, if one air intake temperature of the operating indoor unit is less than or equal to the preset temperature, and the set operation mode of the multi-connected fresh air system is a heating mode, and the heating start of the outdoor unit is controlled. Therefore, when the multi-connected fresh air system is used for refrigerating/heating, the electricity saving efficiency of the multi-connected fresh air system can be improved through the relatively stable indoor environment temperature, and meanwhile, the fluctuation range of the indoor air temperature is far smaller than that of the outdoor environment temperature, so that the fresh air system can be operated for 24 hours in all weather and without shutdown all the year round.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A control method of a multi-connected fresh air system is characterized in that the multi-connected fresh air system comprises an outdoor unit and a plurality of indoor units, each indoor unit comprises a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, the exhaust motor is arranged corresponding to the first heat exchanger, the air supply motor is arranged corresponding to the second heat exchanger, and the control method comprises the following steps:
acquiring a set operation mode of the multi-connected fresh air system;
if the set operation mode of the multi-connected fresh air system is a refrigerating/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed;
acquiring the air inlet temperature of the running indoor unit, and judging whether each air inlet temperature is less than or equal to a preset temperature or not, wherein the air inlet temperature of the running indoor unit is the indoor air temperature;
if one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the outdoor unit to start refrigeration;
and if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a heating mode, controlling the outdoor unit to start heating.
2. The control method of the multi-connected fresh air system according to claim 1, further comprising:
if the set operation mode of the multi-connected fresh air system is a ventilation mode, controlling the outdoor unit to be in a shutdown state, and controlling an air supply motor and an air exhaust motor of an operating indoor unit in the plurality of indoor units to operate at the first preset rotating speed;
if the set operation mode of the multi-connected fresh air system is an air supply mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at the first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed;
and if the set operation mode of the multi-connected fresh air system is an air exhaust mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed.
3. The control method of the multi-split fresh air system as claimed in claim 1, wherein each indoor unit further comprises a throttling component, a first solenoid valve and a second solenoid valve, wherein the first port of the first heat exchanger is communicated to the first port of the second heat exchanger through the throttling component, the second port of the first heat exchanger is connected to the first solenoid valve, and the second port of the second heat exchanger is connected to the second solenoid valve.
4. The control method of the multi-connected fresh air system according to claim 3, further comprising:
if the set operation mode of the multi-connected fresh air system is a refrigeration mode, controlling a first electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state;
and if the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state.
5. The control method of the multi-connected fresh air system according to claim 1, further comprising:
if one of the air inlet temperatures of the running indoor units is lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed;
and if one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed.
6. A computer readable storage medium having instructions stored therein that, when executed, perform a method of controlling a multi-split ventilation system according to any one of claims 1 to 5.
7. The utility model provides a multiple fresh air system which characterized in that includes:
an outdoor unit;
each indoor unit comprises a first heat exchanger, a second heat exchanger, an exhaust motor and an air supply motor, wherein the exhaust motor is arranged corresponding to the first heat exchanger, and the air supply motor is arranged corresponding to the second heat exchanger;
a control module to:
acquiring a set operation mode of the multi-connected fresh air system;
when the set operation mode of the multi-connected fresh air system is a refrigerating/heating mode, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a second preset rotating speed;
acquiring the air inlet temperature of the running indoor unit, and judging whether each air inlet temperature is less than or equal to a preset temperature or not, wherein the air inlet temperature of the running indoor unit is the indoor air temperature;
when judging that one of the air inlet temperatures of the running indoor units is higher than the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the outdoor unit to start refrigeration;
and when one of the air inlet temperatures of the running indoor units is judged to be lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a heating mode, controlling the outdoor unit to be heated and started.
8. The multi-split fresh air system of claim 7, wherein the control module is further configured to:
when the set operation mode of the multi-connected fresh air system is a ventilation mode, controlling the outdoor unit to be in a shutdown state, and controlling an air supply motor and an air exhaust motor of an operating indoor unit in the plurality of indoor units to operate at the first preset rotating speed;
when the set operation mode of the multi-connected fresh air system is an air supply mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at the first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a third preset rotating speed, wherein the third preset rotating speed is less than the first preset rotating speed;
and when the set operation mode of the multi-connected fresh air system is an air exhaust mode, controlling the outdoor unit to be in a stop state, controlling an air supply motor of an operating indoor unit in the indoor units to operate at a first preset rotating speed, and controlling an air exhaust motor of the operating indoor unit in the indoor units to operate at a fourth preset rotating speed, wherein the fourth preset rotating speed is greater than the first preset rotating speed.
9. The multi-split fresh air system as claimed in claim 7, wherein each indoor unit further comprises a throttling component, a first solenoid valve and a second solenoid valve, wherein the first port of the first heat exchanger is communicated to the first port of the second heat exchanger through the throttling component, the second port of the first heat exchanger is connected to the first solenoid valve, and the second port of the second heat exchanger is connected to the second solenoid valve.
10. The multi-split fresh air system of claim 9, wherein the control module is further configured to:
when the set operation mode of the multi-connected fresh air system is a refrigeration mode, controlling a first electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state;
and when the set operation mode of the multi-connected fresh air system is the heating mode, controlling a second electromagnetic valve of an indoor unit in a closed state in the plurality of indoor units to be in a closed state.
11. The multi-split fresh air system of claim 7, wherein the control module is further configured to:
when one of the air inlet temperatures of the running indoor units is judged to be lower than or equal to the preset temperature and the set running mode of the multi-connected fresh air system is a refrigeration mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed;
and when one of the air inlet temperatures of the running indoor units is judged to be higher than the preset temperature and the set running mode of the multi-connected fresh air system is the heating mode, controlling the power transmission fan and the air exhaust motor of the indoor unit corresponding to the air inlet temperature to run at the first preset rotating speed.
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| CN110131849B (en) * | 2018-02-09 | 2021-06-29 | 青岛海尔空调器有限总公司 | Control method and device for air conditioning system and control method and device for air conditioner |
| CN111121152B (en) * | 2019-12-20 | 2021-07-06 | 宁波奥克斯电气股份有限公司 | Multi-connected outdoor unit and fresh air fan mixed connection system and control method thereof |
| CN115013912B (en) * | 2022-06-30 | 2024-05-03 | 珠海格力电器股份有限公司 | Control method and device of fresh air system, storage medium and fresh air system |
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| EP2927611B1 (en) * | 2012-11-30 | 2020-04-08 | Mitsubishi Electric Corporation | Air conditioning device |
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| CN1851337A (en) * | 2005-04-22 | 2006-10-25 | 海尔集团公司 | Domestic multi-connection air conditioner low temperature heating outdoor unit frequency control method |
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