CN113483395B - Low-energy-consumption residential environment control all-in-one machine and control method thereof - Google Patents

Low-energy-consumption residential environment control all-in-one machine and control method thereof Download PDF

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Publication number
CN113483395B
CN113483395B CN202110580344.4A CN202110580344A CN113483395B CN 113483395 B CN113483395 B CN 113483395B CN 202110580344 A CN202110580344 A CN 202110580344A CN 113483395 B CN113483395 B CN 113483395B
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indoor
air
outdoor
valve
heat exchanger
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CN113483395A (en
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敖小件
陈枫
周福华
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Guangzhou Dante Yijia Technology Co ltd
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Guangzhou Dante Yijia Technology Co ltd
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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
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—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
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • 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
    • 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]
    • Y02B30/90—Passive houses; Double facade technology

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a low-energy-consumption residential environment control all-in-one machine, which comprises: the indoor unit is internally provided with a first air filter screen, an indoor first heat exchanger, an indoor second heat exchanger, a blower, a refrigerant inlet pipe, an indoor unit electronic expansion valve, an indoor unit electromagnetic valve, an electronic air valve, a heat exchange core, an exhaust fan, an indoor unit fresh air bypass valve and a humidifier, and the outdoor unit is internally provided with a compressor, a gas-liquid separator, a four-way valve, a condenser, an axial flow fan, an outdoor unit electronic expansion valve and an outdoor unit bypass valve. This environmental control all-in-one possesses functions such as refrigeration, heating, dehumidification, new trend heat recovery, new trend bypass, humidification simultaneously through the ingenious design to indoor set inner structure, integrates, intelligent degree is high, and the energy consumption is low. The invention also provides a control method of the low-energy-consumption residential environment control all-in-one machine, which can realize intelligent automatic adjustment and exchange the target air environment with the minimum energy consumption.

Description

Low-energy-consumption residential environment control all-in-one machine and control method thereof
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a low-energy-consumption residential environment control all-in-one machine and a control method thereof.
Background
Under the background of global warming and energy shortage, building energy conservation with high energy efficiency and low emission as the core plays a crucial role in realizing energy safety and sustainable development of the country. The passive low-energy-consumption building is a building constructed by combining various passive energy-saving means such as natural ventilation, natural lighting, solar radiation, indoor non-heating heat source heating and the like with the external protective structure heat preservation and heat insulation energy-saving technology by fully utilizing natural environment and resources. Two significant characteristics of passive low-energy-consumption buildings are that firstly, the comfort of indoor environment is significantly improved, including indoor thermal comfort (temperature, humidity and air flow rate), indoor air quality, indoor noise level, indoor lighting level and the like; secondly, the energy consumption of the building can be greatly reduced, and the aim of building energy conservation of more than 90 percent is achieved. The passive low-energy-consumption building is developed and popularized, the dependence on an active mechanical heating and refrigerating system is furthest eliminated by greatly reducing the heat/cold load of the building on the premise of ensuring the comfort of indoor environment, the heating and refrigerating energy consumption of the building is further reduced, and meanwhile, renewable energy sources are fully utilized so as to eliminate the dependence on the traditional fossil energy sources, so that the passive low-energy-consumption building becomes an important means for leading the energy conservation and emission reduction of the state in the international building energy conservation technology.
The environment control all-in-one machine is a core device in a passive building concept, is mainly used for air treatment aiming at residential design, and has single function, for example, a Chinese patent with the publication number of CN207881087U discloses an indoor environment control device, which comprises a cabinet, wherein a first air inlet, a first air outlet, a second air inlet, a second air outlet, a direct-current air duct, a fresh air filter screen and a heat exchange core are formed on the cabinet, an air inlet fan is arranged in the direct-current air duct, the direct-current air duct transversely extends from the bottom side and then upwards extends, and reversely extends from the top of the cabinet to be communicated with the first air outlet, a fresh air filter screen is correspondingly arranged in the cabinet, heat exchange fins are correspondingly arranged on the fresh air filter screen, an air valve is correspondingly arranged on the second air inlet, and the heat exchange core is provided with a filter screen corresponding to the third air inlet, and indoor air is directly subjected to heat exchange through the first air outlet inlet by the filter screen and the heat exchange fins under the requirement of a general heat exchange air duct, so that the effect of energy conservation is achieved, and when the requirement of heat exchange is increased, return air is mixed with the fresh air and the heat exchange core, and the fresh air exchange efficiency is efficiently. The indoor environment control equipment meets the cold and heat load requirements of a passive building; the cold and heat recovery of a fresh air system of the passive building is realized; realize passive building new trend quality assurance. However, the indoor environment control device does not have the functional components of independent constant temperature dehumidification, fresh air bypass, free refrigeration and humidification, cannot realize automatic system mode switching, cannot guarantee efficient coordinated operation of the components, and cannot meet the requirement of adopting effective and energy-saving operation strategies under different indoor air states, so that improvement is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the low-energy-consumption residential environment control all-in-one machine which has multiple functions and has the functions of refrigeration, heating, independent dehumidification (constant temperature), fresh air heat recovery, fresh air bypass (free refrigeration), humidification and the like.
The invention also provides a control method of the low-energy-consumption residential environment control all-in-one machine, which can meet the requirement of adopting an effective and energy-saving operation strategy under different indoor air states and effectively control the air quality in the residence: temperature, humidity, cleanliness factor, wind speed, fresh air volume promote synergistic efficiency between each part as far as simultaneously, reduce the energy consumption of system.
In order to realize the technical scheme, the invention provides an environment control all-in-one machine for a low-energy-consumption residence, which comprises: the indoor unit comprises a box body, the box body is divided into a left cavity and a right cavity through a first partition plate, the left cavity is communicated with the right cavity through a first air duct, the right cavity is divided into a heat exchange cavity and a side installation cavity through a second partition plate, the side installation cavity is divided into an exhaust cavity and a bypass cavity through an indoor unit fresh air bypass valve, the heat exchange cavity is communicated with the bypass cavity through a second air duct, and the heat exchange cavity is communicated with the exhaust cavity through a third air duct; the air supply pipe is arranged on a box body on the left side surface of the left chamber, the air feeder is fixed in the left chamber, an air outlet of the air feeder is connected with the air supply pipe, the indoor first heat exchanger and the indoor second heat exchanger are arranged on the right side of the air feeder in series through a pipeline, the indoor electronic expansion valve and the indoor electromagnetic valve are arranged on the pipeline in series between the indoor first heat exchanger and the indoor second heat exchanger in parallel, the refrigerant inlet pipe is connected with the indoor first heat exchanger, the refrigerant discharge pipe is connected with the indoor second heat exchanger, the first air filter screen is tightly attached to the back side of the indoor first heat exchanger, the indoor return air pipe is arranged on the box body on the front side surface of the left chamber and is positioned on the right side of the first air filter screen, the electronic air valve is arranged at the inlet of the indoor return air pipe, and the humidifier is arranged in the left chamber and is positioned on one side of the air feeder; the heat exchange core is arranged in the heat exchange cavity, the second air filter screen and the third air filter screen are respectively arranged at air inlets on the left side and the right side of the heat exchange core, the indoor air inlet pipe is arranged on a box body on the front side surface of the heat exchange cavity, the air inlet on the inner side of the indoor air inlet pipe is separated from the first air channel through a second sealing plate, so that the indoor air inlet pipe is communicated with the second air filter screen arranged at the air inlet on the left side of the heat exchange core, the outdoor air inlet pipe is arranged on the box body on the right side surface of the heat exchange cavity, the air inlet on the inner side of the outdoor air inlet pipe is separated from the third air channel through the first sealing plate, so that the outdoor air inlet pipe is communicated with the third air filter screen arranged at the air inlet on the right side of the heat exchange core, the air outlet on the bottom on the right side of the heat exchange core is communicated with the air inlet of an exhaust fan arranged in the exhaust cavity through the third air channel, the air outlet of the exhaust fan is communicated with the outdoor pipe arranged on the box body on the right side of the exhaust cavity, and the air outlet on the bottom on the left side of the heat exchange core is communicated with the left cavity through the first air channel; the outdoor unit comprises a compressor, a gas-liquid separator, a four-way valve, a condenser, an axial flow fan, an outdoor unit electronic expansion valve, an outdoor unit high-pressure valve, an outdoor unit low-pressure valve and an outdoor unit bypass valve, wherein an outlet of the compressor is connected with an a port of the four-way valve and a refrigerant inlet pipe on the indoor unit through pipelines respectively, a c port of the four-way valve is connected to an inlet of the gas-liquid separator through a pipeline, an outlet of the gas-liquid separator is connected with an inlet of the compressor through a pipeline, a b port of the four-way valve is connected with a first port of the condenser through a pipeline, a second port of the condenser is connected with a refrigerant inlet pipe on the indoor unit through a pipeline, the axial flow fan is arranged close to the condenser in a clinging mode, a d port of the four-way valve is connected to a refrigerant discharge pipe on the indoor unit through a pipeline, the outdoor unit high-pressure valve and the outdoor unit electronic expansion valve are installed on a pipeline, the refrigerant inlet pipe on the indoor unit, the outdoor unit bypass valve is installed on a pipeline, and the refrigerant inlet pipe on the compressor and the indoor unit, and the outdoor unit low-pressure valve is installed on a pipeline, and the d port of the indoor unit is connected with the refrigerant discharge pipe on the indoor unit.
Preferably, the indoor unit control center is in electric control communication with the outdoor unit control center, wherein the indoor unit control center is respectively and electrically connected with a blower, an indoor unit electronic expansion valve, an indoor unit electromagnetic valve, an electronic air valve, an exhaust fan, an indoor unit fresh air bypass valve and a humidifier which are installed in the indoor unit, and the outdoor unit control center is respectively and electrically connected with a compressor, a gas-liquid separator, a four-way valve, a condenser, an axial flow fan, an outdoor unit electronic expansion valve and an outdoor unit bypass valve which are installed in the outdoor unit.
Preferably, a first temperature sensor for monitoring the exhaust temperature is installed on a pipeline connecting the outlet of the compressor and the port a of the four-way valve, a second temperature sensor for monitoring the return air temperature is installed on a pipeline connecting the port c of the four-way valve and the inlet of the gas-liquid separator, and a third temperature sensor for monitoring the outdoor temperature is installed on one side of the condenser, so as to provide temperature parameters of each measurement position for the control center.
Preferably, a first pressure sensor is installed on a pipeline of the port c of the four-way valve, which is connected with the inlet of the gas-liquid separator, and a second pressure sensor is installed on a pipeline of the outlet of the compressor, so as to provide accurate pressure parameters for a control center.
Preferably, a first needle valve is installed on a pipeline connecting an outlet of the gas-liquid separator and an inlet of the compressor, a second needle valve is installed on a pipeline at an outlet of the compressor, and the first needle valve and the second needle valve can be used for filling/evacuating refrigerant into/from the pipeline during production, installation and maintenance.
Preferably, a first filter is installed on a pipeline connecting a d-port of the four-way valve with a low pressure valve of the outdoor unit, and a second filter is installed on a pipeline connecting an electronic expansion valve of the outdoor unit with the condenser, and is used for filtering the refrigerant.
The invention also provides a control method of the low-energy-consumption residential environment control all-in-one machine, which mainly comprises the following steps:
s1, after starting up, judging the working state of a four-way valve by a control center according to the running state of a compressor, the set temperature Th and the detected difference value of the indoor actual temperature Ts within a set time T, and controlling whether the indoor needs to be cooled or heated by controlling the working state of the four-way valve;
s2, when the refrigeration is required, the refrigeration is carried out according to the following steps:
s21, the control center adjusts a four-way valve in an outdoor unit to 0 gear, an a port and a b port in the four-way valve are communicated, an outdoor unit bypass valve is closed, an outdoor unit high-pressure valve, an outdoor unit low-pressure valve and an outdoor unit electronic expansion valve are in normally open states, a blower, an indoor unit electromagnetic valve, an exhaust fan and an electronic air valve in the indoor unit are opened, an indoor unit fresh air bypass valve of the indoor unit is closed, the refrigeration function is achieved, and the refrigerant trend is as follows: the compressor compresses a refrigerant into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas sequentially passes through the port a, the port b, the condenser, the outdoor unit electronic expansion valve, the outdoor unit high-pressure valve, the indoor second heat exchanger, the indoor unit electromagnetic valve, the indoor first heat exchanger, the outdoor unit low-pressure valve, the port d, the port c and the gas-liquid separator of the four-way valve and finally enters the inlet of the compressor to realize circulation; the trend of outdoor new trend is: the outdoor fresh air is sent into the room through the air supply pipe finally under the action of the attractive force of the air feeder, and exchanges heat with low-temperature refrigerants at the indoor first heat exchanger and the indoor second heat exchanger, so that the outdoor fresh air is reduced to the required temperature, and the refrigeration function is realized; the indoor circulating wind trend is as follows: indoor air enters from an indoor return air pipe and an electronic air valve, is combined with fresh air and then passes through a first air filter screen, an indoor first heat exchanger, an indoor second heat exchanger and an indoor air feeder, and finally is sent into the room through an air supply pipe, and indoor circulating air is combined with outdoor fresh air and then exchanges heat with a low-temperature refrigerant at the indoor first heat exchanger and the indoor second heat exchanger, so that the temperature of the air is reduced to the required temperature, and the refrigeration function is realized; the trend of indoor air exhaust is as follows: indoor exhaust air enters from an inlet of an indoor air inlet pipe and is exhausted outdoors through the heat exchange core, the exhaust fan and the outdoor exhaust pipe, and the indoor exhaust air exchanges heat with outdoor fresh air in the heat exchange core to pre-cool the outdoor fresh air;
s22, the control center decides the rotating speed of the exhaust fan according to the concentration of indoor carbon dioxide and the enthalpy difference of indoor and outdoor air, and when the concentration of the indoor carbon dioxide and the enthalpy difference of the indoor and outdoor air are higher than a set value, the control center increases the rotating speed of the exhaust fan, accelerates the discharge of indoor air, increases the introduction amount of fresh air and reduces the concentration of the indoor carbon dioxide;
s23, the control center decides whether to open the indoor unit fresh air bypass valve for free refrigeration according to the enthalpy difference of indoor and outdoor air and the quality of the outdoor air, when the enthalpy difference of the indoor and outdoor air and the quality of the outdoor air both meet set requirements, the indoor unit fresh air bypass valve is opened, indoor exhaust air enters through an inlet of an indoor air inlet pipe, is finally exhausted outdoors through a second air duct, the indoor unit fresh air bypass valve and an exhaust fan, and outdoor fresh air is directly introduced for free refrigeration without exchanging heat with the indoor exhaust air;
s24, judging whether the system is in a refrigeration mode or an independent dehumidification mode according to the state parameters in the return air wet air and the working state of an electronic expansion valve of the indoor unit, and adjusting the refrigeration quantity or the dehumidification quantity;
s3, when the heating is judged to be needed, the heating is carried out according to the following steps:
s31, the control center adjusts the four-way valve to 1 grade, the port a and the port d in the four-way valve are communicated, the outdoor unit bypass valve is closed, the outdoor unit high-pressure valve, the outdoor unit low-pressure valve and the outdoor unit electronic expansion valve are in a normally open state, a blower, an indoor unit electromagnetic valve, an exhaust fan and an electronic air valve in the indoor unit are opened, the indoor unit fresh air bypass valve of the indoor unit is closed, and the heating function is achieved, wherein the refrigerant trend is as follows: the compressor compresses a refrigerant into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas sequentially passes through the port a and the port d of the four-way valve, the outdoor unit low-pressure valve, the indoor first heat exchanger, the indoor unit electromagnetic valve, the indoor second heat exchanger, the outdoor unit high-pressure valve, the outdoor unit electronic expansion valve, the condenser, the port b, the port c and the gas-liquid separator and finally enters the inlet of the compressor to realize circulation; the trend of outdoor new trend is: outdoor fresh air is sent into a room through an air supply pipe under the action of the attractive force of an air feeder in sequence through an outdoor air inlet pipe, a third air filter screen, a heat exchange core, a first air duct, a first air filter screen, a first indoor heat exchanger, a second indoor heat exchanger and the air feeder, and finally the outdoor fresh air exchanges heat with a high-temperature refrigerant at the first indoor heat exchanger and the second indoor heat exchanger, so that the temperature of the outdoor fresh air is raised to a required temperature, and the heating function is realized; the indoor circulating wind trend is as follows: indoor air enters from an indoor return air pipe and an electronic air valve, is combined with fresh air and then passes through a first air filter screen, an indoor first heat exchanger, an indoor second heat exchanger and an indoor air feeder, and finally is sent into the room through an air supply pipe, and indoor circulating air and outdoor fresh air are combined and then exchange heat with high-temperature refrigerants at the indoor first heat exchanger and the indoor second heat exchanger, so that the mixed air is heated to the required temperature, and the heating function is realized; the trend of indoor air exhaust is as follows: indoor exhaust air enters from an inlet of an indoor air inlet pipe and is exhausted outdoors through the heat exchange core, the exhaust fan and the outdoor exhaust pipe, and the indoor exhaust air exchanges heat with outdoor fresh air in the heat exchange core to preheat the outdoor fresh air;
s32, the control center adjusts the rotating speed of the exhaust fan according to the concentration of the indoor carbon dioxide, and when the concentration of the indoor carbon dioxide is higher than a set value, the control center improves the rotating speed of the exhaust fan, accelerates the exhaust of indoor gas, increases the introduction amount of fresh air and reduces the concentration of the indoor carbon dioxide;
s33, judging whether a humidifier in the indoor unit is opened or not according to the absolute humidity of the return air, and controlling the humidifier to be opened by the control center when the absolute humidity of the return air is lower than a set value;
and S34, controlling the working states of the compressor and the outdoor unit electronic expansion valve according to a PID algorithm to adjust the heating quantity.
Preferably, in step S1, the indoor space needs to be cooled or heated specifically by the following means:
s11, after the air conditioner is started, when the indoor actual temperature Ts is detected to be larger than a set temperature Th, the four-way valve is adjusted to a 0-gear, a port a and a port b in the four-way valve are conducted, a refrigeration mode is started, the working state of the compressor and the indoor actual temperature Ts are monitored in real time, when the stop working time of the compressor is detected to exceed a set time T and Ts is larger than Th +0.5 ℃, the four-way valve is adjusted to a 1-gear, a port a and a port d in the four-way valve are conducted, and the air conditioner is switched to a heating mode;
s12, when the fact that the indoor actual temperature Ts is smaller than the set temperature Th is detected, the four-way valve is adjusted to the 1 gear, the port a and the port d in the four-way valve are conducted, the heating mode is started, when the fact that the working stopping time of the compressor exceeds the set time T and Ts +0.5℃ < Th is detected, the four-way valve is adjusted to the 0 gear, the port a and the port b in the four-way valve are conducted, and the cooling mode is switched.
Preferably, the time T set in step S1 is 1 hour.
Preferably, in step S24, when it is determined that the cooling mode is in the cooling mode, the opening of the electronic expansion valve of the outdoor unit is controlled according to the state parameter in the return air humid air, so as to adjust the cooling capacity, and when it is determined that the cooling mode is in the independent dehumidification mode, the bypass valve of the outdoor unit is opened, the electromagnetic valve of the indoor unit is closed, the opening of the electronic expansion valve of the indoor unit is adjusted according to the state parameter in the return air humid air, so as to adjust the rotation speed of the blower of the indoor unit, thereby adjusting the dehumidification capacity.
The environment control all-in-one machine for the low-energy-consumption residence and the control method thereof have the beneficial effects that:
1) This environmental control all-in-one for low energy consumption house is through the ingenious design to indoor set inner structure, through the structural design to each cavity of indoor set and wind channel, the wind direction that sets for between outdoor new trend and the indoor gas flows, and cooperate with the off-premises station, make this environmental control all-in-one possess simultaneously refrigerate, heat, independent dehumidification (also called isothermal dehumidification), new trend heat recovery, new trend bypass (also called free refrigeration), functions such as humidification, the degree of integration is high, very big realization the integration between each part in the indoor set, the energy consumption is low, take up an area of for a short time, simple to operate.
2) According to the control method of the low-energy-consumption residential environment control all-in-one machine, through the design of automatic control logic, the requirement that effective and energy-saving operation strategies are adopted under different indoor air states can be met, and the air quality in a residence can be effectively controlled: temperature, humidity, cleanliness factor, wind speed, fresh air volume promote cooperative efficiency between each part as far as simultaneously, reduce the energy consumption of system.
3) The control method of the low-energy-consumption residential environment control all-in-one machine can automatically judge the operation mode and automatically adjust the working state, and further can automatically match the refrigeration/heating quantity, the humidification/dehumidification quantity, the fresh air quantity or decide whether to directly introduce fresh air or not. Not only realize intelligent automated adjustment, the operating condition of each part of automatic matching moreover trades target air circumstance with minimum energy consumption.
Drawings
FIG. 1 is a schematic view of the structural connection between an indoor unit and an outdoor unit of an environment control all-in-one machine according to the present invention.
Fig. 2 is a schematic perspective view of an indoor unit according to the present invention.
Fig. 3 is a schematic view of the internal structure installation space structure of the indoor unit of the present invention.
Fig. 4 is a plan view of the indoor unit of the present invention.
Fig. 5 is a schematic view of the inner chamber and air duct structure of the indoor unit of the present invention.
Fig. 6 is a schematic view of the air direction in the indoor unit of the present invention.
FIG. 7 is a flow chart illustrating a control method of the environment control all-in-one machine according to the present invention.
Fig. 8 is a schematic diagram of a refrigerating or heating judgment logic in the control method of the environment control all-in-one machine of the invention.
Figure 9 is a psychrometric chart of humid air at standard atmospheric pressure.
In the figure: 1. an indoor unit; 11. a box body; 12. a first air filter; 13. an indoor first heat exchanger; 14. an indoor second heat exchanger; 15. a blower; 16. an air supply pipe; 17. a refrigerant inlet pipe; 18. an electronic expansion valve of the indoor unit; 19. an electromagnetic valve of the indoor unit; 110. a control center; 111. an electronic air valve; 112. an indoor return air duct; 113. an indoor air inlet pipe; 114. a second air filter; 115. a heat exchange core; 116. a third air filter; 117. a first sealing plate; 118. an outdoor air inlet pipe; 119. an outdoor exhaust duct; 120. an exhaust fan; 121. a fresh air bypass valve of the indoor unit; 122. a first separator; 123. a second separator; 124. mounting a support lug; 125. a refrigerant discharge pipe; 126. a second sealing plate; 127. a humidifier; 100. a left chamber; 200. a heat exchange chamber; 300. an exhaust chamber; 400. a bypass chamber; 101. a first air duct; 102. a second air duct; 103. a third air duct;
2. an outdoor unit; 21. a compressor; 22. a gas-liquid separator; 23. a four-way valve; 24. a condenser; 25. an axial flow fan; 26. an electronic expansion valve of the outdoor unit; 27. an outdoor unit high pressure valve; 28. a low pressure valve of the outdoor unit; 29. an outdoor unit bypass valve; 210. a first filter; 211. a second filter; 212. a first pressure sensor; 213. a first temperature sensor; 214. a first needle valve; 215. a second needle valve; 216. a second temperature sensor; 217. a second pressure sensor; 218. a third temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: an environment control all-in-one machine for low-energy-consumption residences.
Referring to fig. 1 to 6, an environmental control all-in-one machine for a low energy consumption home includes:
the indoor unit 1 comprises a box body 11, wherein the box body 11 is provided with a plurality of installation support lugs 124 convenient and quick to install, the box body 11 is divided into a left chamber 100 and a right chamber by a first partition plate 122, the left chamber 100 is communicated with the right chamber through a first air duct 101, the right chamber is divided into a heat exchange chamber 200 and a side installation chamber through a second partition plate 123, the side installation chamber is divided into an exhaust chamber 300 and a bypass chamber 400 by an indoor unit fresh air bypass valve 121, the heat exchange chamber 200 is communicated with the bypass chamber 400 through a second air duct 102, and the heat exchange chamber 200 is communicated with the exhaust chamber 300 through a third air duct 103 (see fig. 5 in particular);
the left chamber 100 is internally provided with a first air filter 12, an indoor first heat exchanger 13, an indoor second heat exchanger 14, a blower 15, a refrigerant inlet pipe 17, an indoor electronic expansion valve 18, an indoor solenoid valve 19, an electronic air valve 111 and a refrigerant outlet pipe 125, an air supply pipe 16 is arranged on a box body 11 on the left side surface of the left chamber 100, the blower 15 is fixed in the left chamber 100, an air outlet of the blower 15 is connected with the air supply pipe 16, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are arranged on the right side of the blower 15 in series through a pipeline, the indoor electronic expansion valve 18 and the indoor solenoid valve 19 are arranged on the pipeline connected between the indoor first heat exchanger 13 and the indoor second heat exchanger 14 in parallel, the refrigerant inlet pipe 17 is connected with the indoor first heat exchanger 13, and the refrigerant outlet pipe 125 is connected with the indoor second heat exchanger, during actual work, control over the indoor electronic expansion valve 18 and the indoor solenoid valve 19 can be realized according to requirements of modes such as refrigeration, heating, dehumidification, and the like, for example: in the refrigeration mode, the electromagnetic valve 19 of the indoor unit is opened, and at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are used for cooling and heat exchange; in the dehumidification mode, the electromagnetic valve 19 of the indoor unit is closed, the opening degree of the electronic expansion valve 18 of the indoor unit is adjusted, the indoor first heat exchanger 13 is used for dehumidification, and the second heat exchanger 14 is used for air backheating; in the heating mode, the electromagnetic valve 19 of the indoor unit is opened, and at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are used for heating and heat exchange; the first air filter 12 is closely mounted at the back side of the indoor first heat exchanger 13, the indoor air return pipe 112 is mounted on the box body 11 on the front side surface of the left chamber 100 and is positioned at the right side of the first air filter 12, the electronic air valve 111 is mounted at the inlet of the indoor air return pipe 112, and in actual work, when the electronic air valve 111 and the blower 15 are simultaneously opened, the air enters the box body 11 from the indoor air return pipe 112 under the action of the attraction of the indoor blower 15, then is subjected to heat exchange with the indoor first heat exchanger 13 and the indoor second heat exchanger 14 after being filtered by the first air filter 12, and is then conveyed to the indoor through the blower 15 via the blower pipe 16, so that the circulation of indoor air is realized; the humidifier 127 is arranged in the left chamber 100 and is positioned on one side of the blower 15, and when humidification is needed, the humidifier 127 is automatically started to humidify air;
the heat exchange core 115 is installed in the heat exchange chamber 200, the second air filter 114 and the third air filter 116 are respectively installed at the air inlets on the left and right sides of the heat exchange core 115, the indoor air inlet pipe 113 is installed on the box body 11 on the front side surface of the heat exchange chamber 200, the air inlet on the inner side of the indoor air inlet pipe 113 is separated from the first air duct 101 by the second sealing plate 126, so that the indoor air can be prevented from being sucked into the left chamber 100 from the indoor air inlet pipe 113 when the blower 15 works, the indoor air inlet pipe 113 is communicated with the second air filter 114 installed at the air inlet on the left side surface of the heat exchange core 115, so that the indoor air can enter the heat exchange core 115 through the indoor air inlet pipe 113 via the second air filter 115, the outdoor air inlet pipe 118 is installed on the box body 11 on the right side surface of the heat exchange chamber 100, and the outdoor air inlet pipe 118 is used for introducing outdoor fresh air, the air inlet at the inner side of the outdoor air inlet pipe 118 is separated from the third air duct 103 by a first sealing plate 117, so that the outdoor air inlet pipe 118 is communicated with a third air filter 116 installed at the air inlet at the right side of the heat exchange core 115, the air outlet at the bottom of the right side of the heat exchange core 115 is communicated with the air inlet of an exhaust fan 120 installed in the exhaust chamber 300 by the third air duct 103, the air outlet of the exhaust fan 120 is communicated with an outdoor exhaust pipe 119 installed on a box body 11 at the right side of the exhaust chamber 300, the air outlet at the bottom of the left side of the heat exchange core 115 is communicated with the left chamber 100 by a first air duct 101, during actual work, outdoor fresh air enters the heat exchange core 115 through the outdoor air inlet pipe 118 and the third air filter 116 under the suction action of the blower 15, then enters the left chamber 100 through the first air duct 101, and then exchanges heat through the third air filter 12, the indoor first heat exchanger 13 and the indoor second heat exchanger 14, finally, the air is conveyed to the indoor through an air blower 15 and an air supply pipe 16; when the exhaust fan 120 is turned on and the indoor unit fresh air bypass valve 121 is closed, the indoor air enters the heat exchange core 115 through the indoor air inlet pipe 113 and the second air filter 114 under the action of the attractive force of the exhaust fan 120, and finally enters the exhaust fan 120 through the third air duct 103 and is discharged through the outdoor exhaust pipe 119; when the exhaust fan 120 is started and the indoor unit fresh air bypass valve 121 is opened, indoor air enters the bypass chamber 400 through the indoor air inlet pipe 113 and the second air duct 102 under the action of the attractive force of the exhaust fan 120, then enters the exhaust chamber 300 through the indoor unit fresh air bypass valve 121, and finally is exhausted from the outdoor exhaust pipe 119;
an outdoor unit 2, the outdoor unit 2 comprising a compressor 21, a gas-liquid separator 22, a four-way valve 23, a condenser 24, an axial flow fan 25, an outdoor unit electronic expansion valve 26, an outdoor unit high pressure valve 27, an outdoor unit low pressure valve 28, and an outdoor unit bypass valve 29, wherein the outlet of the compressor 21 is connected with the a port of the four-way valve 23 and the refrigerant inlet pipe 17 of the indoor unit 1 through pipes, respectively, the c port of the four-way valve 23 is connected to the inlet of the gas-liquid separator 22 through a pipe, the outlet of the gas-liquid separator 22 is connected with the inlet of the compressor 21 through a pipeline, the b port of the four-way valve 23 is connected with the first port of the condenser 24 through a pipeline, a second port of the condenser 24 is connected with a refrigerant inlet pipe 17 on the indoor unit 1 through a pipeline, an axial flow fan 25 is arranged to be closely attached to the condenser 24, a d port of a four-way valve 23 is connected to a refrigerant discharge pipe 125 on the indoor unit 1 through a pipeline, an outdoor unit high-pressure valve 27 and an outdoor unit electronic expansion valve 26 are installed in series on the pipeline of the indoor unit 1 on which the refrigerant inlet pipe 17 is connected with the condenser 24, an outdoor unit bypass valve 29 is installed on the pipeline of the compressor 21 connected with the refrigerant inlet pipe 17 on the indoor unit 1, an outdoor unit low-pressure valve 28 is installed on the pipeline of the d port of the four-way valve 23 connected with the refrigerant discharge pipe 125 on the indoor unit 1, a first temperature sensor 213 for monitoring the exhaust temperature is installed on the pipeline of the outlet of the compressor 21 connected with the a port of the four-way valve 23, a second temperature sensor 216 for monitoring the return air temperature is installed on the pipeline of the c port of the four-way valve liquid separator 24 connected with the inlet of the gas-liquid 22, and a third temperature sensor 218 for monitoring the outdoor temperature is installed on one side of the condenser 24, so as to provide temperature parameters at each measurement position for the control center 110; a first pressure sensor 212 is arranged on a pipeline connecting the port c of the four-way valve 23 and the inlet of the gas-liquid separator 22, and a second pressure sensor 217 is arranged on a pipeline at the outlet of the compressor 21, so that accurate pressure parameters can be provided for the control center 110; a first needle valve 214 is installed on a pipeline connecting an outlet of the gas-liquid separator 22 and an inlet of the compressor 21, a second needle valve 215 is installed on a pipeline at the outlet of the compressor 21, refrigerant can be filled/evacuated into/from the pipeline during production, installation and maintenance through the first needle valve 214 and the second needle valve 215, a first filter 210 is installed on a pipeline connecting a d port of the four-way valve 23 and the outdoor unit low-pressure valve 28, and a second filter 211 is installed on a pipeline connecting the outdoor unit electronic expansion valve 26 and the condenser 24, and is used for filtering the refrigerant;
the control center comprises an indoor unit control center 110 and an outdoor unit control center, the indoor unit control center 110 is in electric control communication with the outdoor unit control center, wherein the indoor unit control center 110 is respectively and electrically connected with a blower 15, an indoor unit electronic expansion valve 18, an indoor unit electromagnetic valve 19, an electronic air valve 111, an exhaust fan 120, an indoor unit fresh air bypass valve 121 and a humidifier 127 which are installed in an indoor unit 1, and the outdoor unit control center is respectively and electrically connected with a compressor 21, an air-liquid separator 22, a four-way valve 23, a condenser 24, an axial flow air 25, an outdoor unit electronic expansion valve 26, an outdoor unit bypass valve 29, a first pressure sensor 212, a first temperature sensor 213, a first needle valve 214, a second needle valve 215, a second temperature sensor 216, a second pressure sensor 217, a third temperature sensor 218 and the like which are installed in an outdoor unit 2, so as to realize automatic control of the indoor unit 1 and the outdoor unit 2.
The working principle of the environment control all-in-one machine for the low-energy-consumption house when being started is as follows:
1) When the refrigeration function is started, the control center controls the connection of the port a and the port b in the four-way valve 23, closes the outdoor unit bypass valve 29, normally opens the outdoor unit high-pressure valve 27, the outdoor unit low-pressure valve 28 and the outdoor unit electronic expansion valve 26, opens the blower 15, the indoor unit electromagnetic valve 19, the exhaust fan 120 and the electronic air valve 111 in the indoor unit 1, and closes the indoor unit fresh air bypass valve 121 of the indoor unit 1, thereby realizing the refrigeration function. Wherein the refrigerant trend is as follows: the compressor 21 compresses refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure gas sequentially enters the condenser 24 through the port a and the port b of the four-way valve 23 to be subjected to heat exchange and cooled into liquid, then enters the outdoor unit electronic expansion valve 26 to become low-temperature gas-liquid mixture, then enters the indoor second heat exchanger 14, the indoor electromagnetic valve 19 and the indoor first heat exchanger 13 of the indoor unit through the outdoor unit high-pressure valve 27, the low-temperature gas-liquid mixture is subjected to heat exchange with air in the indoor first heat exchanger 13 and the indoor second heat exchanger 14 to become low-temperature gas (at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are both evaporators, refrigerants are evaporated to absorb heat, air is cooled), then enters the gas-liquid separator 22 through the outdoor unit low-pressure valve 28 and the port d and the port c of the four-way valve 23 to be subjected to gas-liquid separation, and the refrigerant after the gas-liquid separation finally enters the inlet of the compressor 21 to realize circulation. Referring to fig. 6, the outdoor fresh air flows through a line a, and the trend of the outdoor fresh air is as follows: outdoor fresh air enters the box body 11 from an outdoor air inlet pipe 118 under the action of the attraction of the air blower 15, enters the heat exchange core 115 after being filtered by the third air filter screen 116, is pre-cooled by exchanging heat with indoor exhaust air in the heat exchange core 115, then enters the left chamber 100 through the first air duct 101, is filtered again by the first air filter screen 12, exchanges heat with the indoor first heat exchanger 13 and the indoor second heat exchanger 14 (air cooling), so that the temperature of the outdoor fresh air is reduced to a required temperature, and is conveyed to the indoor through the air blower 15 and the air supply pipe 16, so that the refrigeration function is realized; referring to fig. 6, the indoor circulating air goes along a line d, and the indoor circulating air direction is as follows: indoor air enters from an indoor return air pipe 112 and an electronic air valve 111, is combined with fresh air, passes through a first air filter screen 12, an indoor first heat exchanger 13, an indoor second heat exchanger 14 and an indoor air feeder 15, and is finally sent into a room through an air supply pipe 16, and indoor circulating air and outdoor fresh air are combined and then exchange heat with a low-temperature refrigerant at the indoor first heat exchanger 13 and the indoor second heat exchanger 14, so that the air is reduced to the required temperature, and the refrigeration function is realized; referring to fig. 6, the indoor exhaust air goes to the route b, and the indoor exhaust air goes to: indoor exhaust air enters from an inlet of the indoor air inlet pipe 113 under the action of the attractive force of the exhaust fan 120 and is exhausted outdoors through the heat exchange core 115, the exhaust fan 120 and the outdoor exhaust pipe 119, and under the refrigeration function, the temperature of the indoor exhaust air is lower than that of outdoor fresh air, so that the indoor exhaust air exchanges heat with the outdoor fresh air in the heat exchange core 115, the outdoor fresh air can be precooled, and the energy consumption is reduced;
2) When the heating function is started, the control center conducts the port a and the port d in the four-way valve 23, closes the outdoor unit bypass valve 29, normally opens the outdoor unit high-pressure valve 27, the outdoor unit low-pressure valve 28 and the outdoor unit electronic expansion valve 26, opens the blower 15, the indoor unit electromagnetic valve 19, the exhaust fan 120 and the electronic air valve 111 in the indoor unit 1, and closes the indoor unit fresh air bypass valve 121 of the indoor unit 1, thereby realizing the heating function. Wherein the refrigerant trend is as follows: the compressor 21 compresses refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas sequentially enters the indoor first heat exchanger 13, the indoor electromagnetic valve 19 and the indoor second heat exchanger 14 through the port a and the port d of the four-way valve 23 and the outdoor low-pressure valve 28 to perform heat exchange with air (at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are both condensers, the refrigerant is cooled and the air is heated in the heat exchange process), the refrigerant after the heat exchange enters the outdoor electronic expansion valve 26 through the outdoor high-pressure valve 27, the refrigerant is throttled into low-pressure refrigerant through the outdoor electronic expansion valve 26, and finally enters the gas-liquid separator 22 through the condenser 24, the port b and the port c of the four-way valve 23 to perform gas-liquid separation, and finally enters the inlet of the compressor 21 to realize circulation. Referring to fig. 6, the outdoor fresh air route a is shown, and the trend of the outdoor fresh air is as follows: outdoor fresh air enters the box body 11 from an outdoor air inlet pipe 118 under the action of the attraction of the air blower 15, enters the heat exchange core 115 after being filtered by the third air filter screen 116, is preheated by heat exchange with indoor exhaust air in the heat exchange core 115, then enters the left chamber 100 through the first air duct 101, is filtered again by the first air filter screen 12, exchanges heat with the indoor first heat exchanger 13 and the indoor second heat exchanger 14 (air temperature rise), so that the outdoor fresh air is heated to a required temperature, and is conveyed to the indoor through the air blower 15 and the air supply pipe 16, and the heating function is realized; referring to fig. 6, the indoor circulating air moves along a line d, and the indoor circulating air trend is as follows: indoor air enters from an indoor return air pipe 112 and an electronic air valve 111, is combined with fresh air, passes through a first air filter screen 12, an indoor first heat exchanger 13, an indoor second heat exchanger 14 and an indoor air feeder 15, and is finally sent into a room through an air supply pipe 16, and indoor circulating air and outdoor fresh air are combined and then exchanges heat with a high-temperature refrigerant at the indoor first heat exchanger 13 and the indoor second heat exchanger 14, so that the air is heated to the required temperature, and the heating function is realized; referring to fig. 6, the indoor exhaust air goes to the route b, and the indoor exhaust air goes to: indoor exhaust air enters from an inlet of the indoor air inlet pipe 113 under the action of attractive force of the exhaust fan 120 and is exhausted outdoors through the heat exchange core 115, the exhaust fan 120 and the outdoor exhaust pipe 119, and under the heating function, the temperature of the indoor exhaust air is higher than that of outdoor fresh air, so that the indoor exhaust air is subjected to heat exchange with the outdoor fresh air in the heat exchange core 115, the outdoor fresh air can be preheated, fresh air heat recovery is realized, and energy consumption is reduced.
3) When the independent dehumidification function is started (independent dehumidification can be called isothermal dehumidification, which means that the humidity in the air is removed without temperature drop), the control center controls the port a and the port b in the four-way valve 23 to be conducted, the outdoor unit bypass valve 29 is opened, the outdoor unit high-pressure valve 27, the outdoor unit low-pressure valve 28 and the outdoor unit electronic expansion valve 26 are normally opened, the blower 15, the exhaust fan 120 and the electronic air valve 111 in the indoor unit 1 are opened, the indoor unit electromagnetic valve 19 and the indoor unit fresh air bypass valve 121 of the indoor unit 1 are closed, and the independent dehumidification (isothermal dehumidification) function is realized. Wherein the refrigerant trend is as follows: the compressor 21 compresses refrigerant into high-temperature high-pressure gas, part of the refrigerant enters the condenser 24 through the port a and the port b of the four-way valve 23 in sequence to be subjected to heat exchange and cooled into liquid, then enters the outdoor unit electronic expansion valve 26 to become low-temperature gas-liquid mixture, then enters the outdoor unit high-pressure valve 27, and part of the refrigerant of the high-temperature high-pressure gas directly enters the outdoor unit high-pressure valve 27 through the outdoor unit bypass valve 29, the refrigerant of the low-temperature gas-liquid mixture and the refrigerant of the high-temperature high-pressure gas are mixed in a pipeline to become sub-high-temperature gas-liquid mixture, then enter the indoor second heat exchanger 14 of the indoor unit through the outdoor unit high-pressure valve 27, and are throttled into low-temperature liquid refrigerant through the indoor unit electronic expansion valve 18 to enter the indoor first heat exchanger 13 (at this time, the air exchanges heat with the indoor first heat exchanger 13 to be cooled and changed into dry cold air, then the dry cold air is dehumidified through the dry cold air subjected to temperature reduction and slight rise, the dry hot air is finally sent into the indoor through the indoor blower 15 and the indoor pipe 16 to realize the function of isothermal dehumidification), and then the refrigerant enters the inlet of the outdoor unit 21 through the low-pressure valve 28, the port d and the port c of the four-way valve 23 to be subjected to be separated into the gas-liquid separator 22, and finally, and liquid separator 21 to realize the gas-liquid separation of the inlet of the outdoor unit. After the independent dehumidification function is started, the trend of outdoor fresh air, the trend of indoor circulating air and the trend of indoor exhaust air are the same as those of the refrigeration function. The function is particularly suitable for being used in the weather environments such as south China, rainy days and the like.
4) When the fresh air bypass function (namely the free refrigeration mode) is started, the free refrigeration mode can be started when the quality of the outdoor air is excellent and the temperature of the outdoor air is lower than the indoor temperature, so that the energy consumption is saved. After the fresh air bypass function is started, the control center controls the indoor fresh air bypass valve 121 to be opened, as shown in fig. 6, indoor exhaust air enters a line c, the indoor exhaust air enters through an inlet of an indoor air return pipe 113 under the attraction of an exhaust fan 120, finally is exhausted outdoors through an outdoor exhaust pipe 119 via a second air duct 102, the indoor fresh air bypass valve 121 and the exhaust fan 120, and outdoor fresh air is directly introduced into the outdoor fresh air for free refrigeration without exchanging heat with the indoor exhaust air;
5) When the humidifying function is started, the control center automatically starts the humidifier 127 under the condition that the humidity of the air is too low in the heating mode, so that the dry hot air can be humidified, and the comfort level of the indoor air is enhanced.
This environmental control all-in-one for low energy consumption house is through the ingenious design to indoor set 1 inner structure, through the structural design to each cavity of indoor set 1 and wind channel, flow according to the wind direction that sets for between outdoor new trend and the indoor gas, and cooperate with off-premises station 2, make this environmental control all-in-one possess simultaneously and refrigerate, heat, independent dehumidification (also called isothermal dehumidification), new trend heat recovery, new trend bypass (also called free refrigeration), functions such as humidification, integrate the degree height, very big realization each component integration in the indoor set, the energy consumption is low, and the occupation of land is little, simple to operate.
Example 2: a control method of an environment control all-in-one machine for a low-energy-consumption house is disclosed.
Referring to fig. 9, fig. 9 is a psychrometric chart of the humid air at normal atmospheric pressure. In the figure, the ordinate is temperature, the abscissa is moisture content, the arc line is the equal relative humidity line, and the oblique line is the equal enthalpy line. The temperature, humidity, enthalpy of the air in the residential room can all be found in the above diagram. For example: this point of state can be found in the "refrigeration, dehumidification" zone at 30 ℃ and 60% relative humidity. For example, at 15 ℃ and 20% relative humidity, this state point is located in the "heating and humidifying" region. The all-in-one machine and the control logic thereof have the functions of identifying the state point of the indoor air, and automatically adopting a corresponding strategy to regulate the temperature and the humidity of the indoor air to a 'comfortable' area. In addition, working states of a bypass valve, a fan, a compressor, an electronic expansion valve and the like are judged according to the set target temperature and the outdoor air state, so that the air conditioning effects of intelligent judgment, high-efficiency cooperation and low energy consumption are achieved. FIG. 9 shows the bottom layer logic of the control logic of the present invention, and the bottom layer logic is used as the starting point for realizing the automatic and intelligent control of the all-in-one machine.
Referring to fig. 1 to 8, a control method of a low-energy-consumption residential environment control all-in-one machine mainly includes the following steps:
s1, after the power is turned on, the control center 110 determines the working state of the four-way valve 23 according to the difference between the running state of the compressor 21, the set temperature Th and the detected indoor actual temperature Ts in the past 1 hour, and controls whether the indoor needs to be cooled or heated by controlling the working state of the four-way valve 23, specifically, the following method is used: when the indoor actual temperature Ts is detected to be greater than the set temperature Th, the four-way valve 23 is adjusted to the 0-position, the port a and the port b in the four-way valve 23 are conducted, the refrigeration mode is started, the working state of the compressor 21 and the indoor actual temperature Ts are monitored in real time, when the stop working time of the compressor 21 is detected to exceed 1 hour and Ts is greater than Th +0.5 ℃, the four-way valve 23 is adjusted to the 1-position, the port a and the port d in the four-way valve 23 are conducted, and the heating mode is switched; when the actual indoor temperature Ts is detected to be less than the set temperature Th, the four-way valve 23 is adjusted to the 1-gear, the port a and the port d in the four-way valve 23 are conducted, the heating mode is started, when the stop working time of the compressor 21 is detected to be longer than 1 hour and Ts +0.5 ℃ < Th, the four-way valve 23 is adjusted to the 0-gear, the port a and the port b in the four-way valve 23 are conducted, and the cooling mode and the heating mode are switched to the cooling mode, so that the automatic switching of the cooling mode and the heating mode can be realized;
s2, when the refrigeration is judged to be needed, the method comprises the following steps:
s21, the control center 110 adjusts the four-way valve 23 in the outdoor unit 2 to 0-position, the port a and the port b in the four-way valve 23 are conducted, the outdoor unit bypass valve 29 is closed, the outdoor unit high-pressure valve 27, the outdoor unit low-pressure valve 28 and the outdoor unit electronic expansion valve 26 are in normally open states, the blower 15, the indoor unit electromagnetic valve 19, the exhaust fan 120 and the electronic air valve 111 in the indoor unit 1 are opened, and the indoor unit fresh air bypass valve 121 of the indoor unit 1 is closed, so that the refrigeration function is realized. Wherein the refrigerant trend is as follows: the compressor 21 compresses refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas sequentially enters the condenser 24 through the port a and the port b of the four-way valve 23 to be subjected to heat exchange and cooling to form liquid, then enters the outdoor unit electronic expansion valve 26 to form low-temperature gas-liquid mixture, then enters the indoor second heat exchanger 14, the indoor electromagnetic valve 19 and the indoor first heat exchanger 13 of the indoor unit through the outdoor unit high-pressure valve 27, the low-temperature gas-liquid mixture is subjected to heat exchange with air in the indoor first heat exchanger 13 and the indoor second heat exchanger 14 to form low-temperature gas (at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are both evaporators, refrigerants are evaporated and absorb heat, and air is cooled), then enters the gas-liquid separator 22 through the outdoor unit low-pressure valve 28, the port d and the port c of the four-way valve 23 to be subjected to gas-liquid separation, and finally the refrigerant after the gas-liquid separation enters the inlet of the compressor 21 to realize circulation. Referring to fig. 6, the outdoor fresh air route a is shown, and the trend of the outdoor fresh air is as follows: outdoor fresh air enters the box body 11 from an outdoor air inlet pipe 118 under the action of the attraction of the air blower 15, enters the heat exchange core 115 after being filtered by the third air filter screen 116, is pre-cooled by exchanging heat with indoor exhaust air in the heat exchange core 115, then enters the left chamber 100 through the first air duct 101, is filtered again by the first air filter screen 12, exchanges heat with the indoor first heat exchanger 13 and the indoor second heat exchanger 14 (air cooling), so that the temperature of the outdoor fresh air is reduced to a required temperature, and is conveyed to the indoor through the air blower 15 and the air supply pipe 16, so that the refrigeration function is realized; referring to fig. 6, the indoor circulating air moves along a line d, and the indoor circulating air trend is as follows: indoor air enters from an indoor return air pipe 112 and an electronic air valve 111, is combined with fresh air, passes through a first air filter screen 12, an indoor first heat exchanger 13, an indoor second heat exchanger 14 and an indoor air feeder 15, and is finally sent into a room through an air supply pipe 16, and indoor circulating air and outdoor fresh air are combined and then exchange heat with a low-temperature refrigerant at the indoor first heat exchanger 13 and the indoor second heat exchanger 14, so that the air is reduced to the required temperature, and the refrigeration function is realized; referring to fig. 6, the indoor exhaust air goes along the line b, and the indoor exhaust air goes along the direction of: indoor exhaust air enters from an inlet of the indoor air inlet pipe 113 under the action of the attractive force of the exhaust fan 120 and is exhausted outdoors through the heat exchange core 115, the exhaust fan 120 and the outdoor exhaust pipe 119, and under the refrigeration function, the temperature of the indoor exhaust air is lower than that of outdoor fresh air, so that the indoor exhaust air exchanges heat with the outdoor fresh air in the heat exchange core 115, the outdoor fresh air can be precooled, and the energy consumption is reduced;
s22, after the refrigeration function is started, the control center decides the rotating speed of the exhaust fan 120 according to the concentration of indoor carbon dioxide and the enthalpy difference of indoor and outdoor air, and when the concentration of the indoor carbon dioxide and the enthalpy difference of the indoor and outdoor air are higher than set values, the control center increases the rotating speed of the exhaust fan 120, accelerates the exhaust of indoor air, increases the introduction amount of outdoor fresh air and reduces the concentration of the indoor carbon dioxide;
s23, the control center decides whether to open the indoor unit fresh air bypass valve 121 for free refrigeration according to the enthalpy difference of indoor and outdoor air and the quality of outdoor air, when the enthalpy difference of indoor and outdoor air and the quality of outdoor air both meet the set requirements, the indoor unit fresh air bypass valve 121 is opened after the indoor and outdoor air fall into a free refrigeration area shown in the figure 9, indoor exhaust air enters the exhaust fan 120 through the inlet of the indoor air inlet pipe 113, and is finally exhausted outdoors through the second air duct 102, the indoor unit fresh air bypass valve 121 and the exhaust fan 120, outdoor fresh air is not subjected to heat exchange with indoor exhaust air, outdoor fresh air is directly introduced for free refrigeration, the energy consumption is greatly reduced, and otherwise, the bypass valve is closed;
s24, judging whether the system is in a refrigeration mode or an independent dehumidification mode according to the state parameters in the return air humid air and the working state of the electronic expansion valve 18 of the indoor unit, and adjusting the refrigerating capacity or the dehumidification capacity, when the system is judged to be in the refrigeration mode, controlling the opening degree of the electronic expansion valve 26 of the outdoor unit according to the state parameters in the return air humid air so as to adjust the refrigerating capacity, when the system is judged to be in the independent dehumidification mode, opening the bypass valve 29 of the outdoor unit, closing the electromagnetic valve 19 of the indoor unit, adjusting the opening degree of the electronic expansion valve 18 of the indoor unit according to the state parameters in the return air humid air, and adjusting the rotating speed of the blower 15 of the indoor unit so as to adjust the dehumidification capacity;
s3, when the heating is judged to be needed, the method comprises the following steps:
s31, the control center 110 adjusts the four-way valve 23 to 1-gear, the port a and the port d in the four-way valve 23 are conducted, the outdoor unit bypass valve 29 is closed, the outdoor unit high-pressure valve 27, the outdoor unit low-pressure valve 28 and the outdoor unit electronic expansion valve 26 are in normally open states, the blower 15, the indoor unit electromagnetic valve 19, the exhaust fan 120 and the electronic air valve 111 in the indoor unit 1 are opened, and the indoor unit fresh air bypass valve 121 of the indoor unit 1 is closed, so that the heating function is realized. Wherein the refrigerant trend is as follows: the compressor 21 compresses refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas sequentially enters the indoor first heat exchanger 13, the indoor electromagnetic valve 19 and the indoor second heat exchanger 14 through the port a and the port d of the four-way valve 23 and the outdoor low-pressure valve 28 to perform heat exchange with air (at the moment, the indoor first heat exchanger 13 and the indoor second heat exchanger 14 are both condensers, the refrigerant is cooled and the air is heated in the heat exchange process), the refrigerant after the heat exchange enters the outdoor electronic expansion valve 26 through the outdoor high-pressure valve 27, the refrigerant is throttled into low-pressure refrigerant through the outdoor electronic expansion valve 26, and finally enters the gas-liquid separator 22 through the condenser 24, the port b and the port c of the four-way valve 23 to perform gas-liquid separation, and finally enters the inlet of the compressor 21 to realize circulation. Referring to fig. 6, the outdoor fresh air route a is shown, and the trend of the outdoor fresh air is as follows: outdoor fresh air enters the box body 11 from an outdoor air inlet pipe 118 under the action of the attraction of the air blower 15, enters the heat exchange core 115 after being filtered by the third air filter screen 116, is preheated by heat exchange with indoor exhaust air in the heat exchange core 115, then enters the left chamber 100 through the first air duct 101, is filtered again by the first air filter screen 12, exchanges heat with the indoor first heat exchanger 13 and the indoor second heat exchanger 14 (air temperature rise), so that the outdoor fresh air is heated to a required temperature, and is conveyed to the indoor through the air blower 15 and the air supply pipe 16, and the heating function is realized; referring to fig. 6, the indoor circulating air goes along a line d, and the indoor circulating air direction is as follows: indoor air enters from an indoor air return pipe 112 and an electronic air valve 111, is combined with fresh air, passes through a first air filter screen 12, an indoor first heat exchanger 13, an indoor second heat exchanger 14 and an indoor air feeder 15, and is finally sent into the room through an air supply pipe 16, and indoor circulating air and outdoor fresh air are combined and then exchange heat with high-temperature refrigerants at the indoor first heat exchanger 13 and the indoor second heat exchanger 14, so that the temperature of the air is raised to a required temperature, and a heating function is realized; referring to fig. 6, the indoor exhaust air goes along the line b, and the indoor exhaust air goes along the direction of: indoor exhaust air enters from an inlet of the indoor air inlet pipe 113 under the action of the attractive force of the exhaust fan 120 and is exhausted outdoors through the heat exchange core 115, the exhaust fan 120 and the outdoor exhaust pipe 119, and under the heating function, the temperature of the indoor exhaust air is higher than that of outdoor fresh air, so that the indoor exhaust air exchanges heat with the outdoor fresh air in the heat exchange core 115, the outdoor fresh air can be preheated, the heat recovery of the fresh air is realized, and the energy consumption is reduced;
s32, in the heating mode, the control center adjusts the rotating speed of the exhaust fan 120 according to the concentration of the indoor carbon dioxide, and when the concentration of the indoor carbon dioxide is higher than a set value, the control center increases the rotating speed of the exhaust fan 120, accelerates the exhaust of indoor gas, increases the introduction amount of fresh air and reduces the concentration of the indoor carbon dioxide;
s33, in the heating mode, whether the humidifier 127 in the indoor unit is started or not is judged according to the absolute humidity of the return air, when the absolute humidity of the return air is lower than a set value, the humidifier 127 is automatically started, otherwise, the humidifier 127 is closed;
and S34, controlling the working states of the compressor 21 and the outdoor electronic expansion valve 26 according to a PID algorithm to adjust the heating quantity, when the indoor temperature is too high, reducing the power of the compressor 21 by the control center, reducing the opening degree of the outdoor electronic expansion valve 26, reducing the heating quantity, and when the indoor temperature is too low, improving the power of the compressor 21 by the control center, increasing the opening degree of the outdoor electronic expansion valve 26 and increasing the heating quantity.
The control method of the environment control all-in-one machine for the low-energy-consumption house can meet the requirement of adopting effective and energy-saving operation strategies under different indoor air states through the design of automatic control logic, and can effectively control the air quality in the house: temperature, humidity, cleanliness factor, wind speed, fresh air volume promote cooperative efficiency between each part as far as simultaneously, reduce the energy consumption of system.
To further explain the invention, the following cases are specifically cited:
case 1: when the machine is started up on a certain day, the outdoor temperature is 0 ℃, the indoor temperature is 12 ℃, the indoor humidity is 35 percent, and the indoor CO is 2 The concentration was 450PPM. The user sets 20 degrees. When the system recognizes that the compressor is stopped in the past 1 hour, the difference value between the set temperature of the user and the actual temperature is +8, the system judges that the four-way valve is electrified, and the system runs in a heating mode. The system identifies the CO at this time 2 The concentration is less than the threshold value, and the new fan runs at a low wind gear. The system adjusts the compressor and the electronic expansion valve through a PID algorithm, and adjusts the heating quantity. The system identifies that the current indoor air is in a heating and humidifying interval, starts the humidifier and increases the humidity indoors. After 1 hour, the indoor temperature and humidity meet the comfortable conditions, but the refrigeration mode is not switched (the compressor is not completely stopped in the past 1 hour), and the fresh air volume is continuously adjusted and the humidification component is closed under the heating mode.
Case 2: the equipment is continuously started for 3 months and still runs in a heating mode for several days, the season enters early summer, the current outdoor temperature is 23 ℃, the indoor temperature is 26.5 ℃, the indoor humidity is 55 percent, and the indoor CO is 2 Concentration 530PAnd PM. User sets 25.5 degrees), the compressor is stopped continuously after a period of time, the time for stopping the compressor exceeds 1 hour, and the difference value between the set temperature of the user and the actual temperature is minus 1. The system automatically closes the four-way valve and enters a refrigeration mode. Although indoor CO 2 The concentration does not reach the threshold value, but the outdoor temperature is proper, the bypass valve is opened, the free refrigeration mode is entered, and outdoor fresh air is directly introduced to provide the indoor refrigeration capacity. Due to the appropriate humidity, the system does not enter a stand-alone dehumidification mode. The system adjusts the actions of the compressor and the electronic expansion valve in the refrigeration mode according to the PID algorithm, and gradually adjusts the indoor temperature to the target temperature of 25.5.
It can be seen from the above two cases that, after the technology of the invention is applied, the system can not only automatically judge the operation mode and automatically adjust the working state, but also automatically match the refrigeration/heating capacity, the humidification/dehumidification capacity, the fresh air volume or decide whether to directly introduce fresh air. Not only realize intelligent automatic adjustment, but also automatically match the operating condition of each part to the target air environment is obtained in exchange for minimum energy consumption.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.

Claims (4)

1. A control method of an environment control all-in-one machine for a low-energy-consumption house is characterized by mainly comprising the following steps:
s1, after starting up, judging the working state of a four-way valve by a control center according to the running state of a compressor, the set temperature Th and the detected difference value of the indoor actual temperature Ts within a set time T, and controlling whether the indoor needs to be cooled or heated by controlling the working state of the four-way valve;
s2, when the refrigeration is required, the refrigeration is carried out according to the following steps:
s21, the control center adjusts a four-way valve in an outdoor unit to 0 gear, an a port and a b port in the four-way valve are communicated, an outdoor unit bypass valve is closed, an outdoor unit high-pressure valve, an outdoor unit low-pressure valve and an outdoor unit electronic expansion valve are in normally open states, a blower, an indoor unit electromagnetic valve, an exhaust fan and an electronic air valve in the indoor unit are opened, an indoor unit fresh air bypass valve of the indoor unit is closed, the refrigeration function is achieved, and the refrigerant trend is as follows: the compressor compresses a refrigerant into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas sequentially passes through the port a, the port b, the condenser, the outdoor unit electronic expansion valve, the outdoor unit high-pressure valve, the indoor second heat exchanger, the indoor unit electromagnetic valve, the indoor first heat exchanger, the outdoor unit low-pressure valve, the port d, the port c and the gas-liquid separator of the four-way valve and finally enters the inlet of the compressor to realize circulation; the trend of outdoor fresh air is as follows: outdoor fresh air is sent into a room through an air supply pipe under the action of the attractive force of an air feeder in sequence through an outdoor air inlet pipe, a third air filter screen, a heat exchange core, a first air duct, a first air filter screen, a first indoor heat exchanger, a second indoor heat exchanger and the air feeder, and finally the outdoor fresh air exchanges heat with a low-temperature refrigerant at the first indoor heat exchanger and the second indoor heat exchanger, so that the outdoor fresh air is reduced to the required temperature, and the refrigeration function is realized; the indoor circulating wind trend is as follows: indoor air enters from an indoor return air pipe and an electronic air valve, is combined with fresh air, passes through a first air filter screen, an indoor first heat exchanger, an indoor second heat exchanger and an indoor air feeder, and is finally sent into a room through an air supply pipe, and indoor circulating air is combined with outdoor fresh air and then exchanges heat with a low-temperature refrigerant at the indoor first heat exchanger and the indoor second heat exchanger, so that the air is reduced to the required temperature, and the refrigeration function is realized; the trend of indoor air exhaust is as follows: indoor exhaust air enters from an inlet of an indoor air inlet pipe and is exhausted outdoors through the heat exchange core, the exhaust fan and the outdoor exhaust pipe, and the indoor exhaust air exchanges heat with outdoor fresh air in the heat exchange core to pre-cool the outdoor fresh air;
s22, the control center decides the rotating speed of the exhaust fan according to the concentration of indoor carbon dioxide and the enthalpy difference of indoor and outdoor air, and when the concentration of the indoor carbon dioxide and the enthalpy difference of the indoor and outdoor air are higher than a set value, the control center increases the rotating speed of the exhaust fan, accelerates the exhaust of indoor air, increases the introduction amount of fresh air and reduces the concentration of the indoor carbon dioxide;
s23, the control center decides whether to open the indoor unit fresh air bypass valve for free refrigeration according to the enthalpy difference of indoor and outdoor air and the quality of the outdoor air, when the enthalpy difference of the indoor and outdoor air and the quality of the outdoor air both meet set requirements, the indoor unit fresh air bypass valve is opened, indoor exhaust air enters through an inlet of an indoor air inlet pipe, is finally exhausted outdoors through a second air duct, the indoor unit fresh air bypass valve and an exhaust fan, and outdoor fresh air is directly introduced for free refrigeration without exchanging heat with the indoor exhaust air;
s24, judging whether the system is in a refrigeration mode or an independent dehumidification mode according to the state parameters in the return air wet air and the working state of an electronic expansion valve of the indoor unit, and adjusting the refrigeration quantity or the dehumidification quantity;
s3, when the heating is judged to be needed, the method comprises the following steps:
s31, the control center adjusts the four-way valve to 1 grade, the port a and the port d in the four-way valve are communicated, the outdoor unit bypass valve is closed, the outdoor unit high-pressure valve, the outdoor unit low-pressure valve and the outdoor unit electronic expansion valve are in a normally open state, a blower, an indoor unit electromagnetic valve, an exhaust fan and an electronic air valve in the indoor unit are opened, the indoor unit fresh air bypass valve of the indoor unit is closed, and the heating function is achieved, wherein the refrigerant trend is as follows: the compressor compresses a refrigerant into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas sequentially passes through the port a and the port d of the four-way valve, the outdoor unit low-pressure valve, the indoor first heat exchanger, the indoor unit electromagnetic valve, the indoor second heat exchanger, the outdoor unit high-pressure valve, the outdoor unit electronic expansion valve, the condenser, the port b, the port c and the gas-liquid separator and finally enters the inlet of the compressor to realize circulation; the trend of outdoor fresh air is as follows: the outdoor fresh air is sent into the room through the air supply pipe finally under the action of the attractive force of the air feeder, and exchanges heat with high-temperature refrigerants at the indoor first heat exchanger and the indoor second heat exchanger, so that the temperature of the outdoor fresh air is raised to a required temperature, and the heating function is realized; the indoor circulating wind trend is as follows: indoor air enters from an indoor return air pipe and an electronic air valve, is combined with fresh air, passes through a first air filter screen, an indoor first heat exchanger, an indoor second heat exchanger and an indoor air feeder, and is finally sent into a room through an air supply pipe, and indoor circulating air is combined with outdoor fresh air and then exchanges heat with a high-temperature refrigerant at the indoor first heat exchanger and the indoor second heat exchanger, so that the mixed air is heated to the required temperature, and the heating function is realized; the trend of indoor air exhaust is as follows: indoor exhaust air enters from an inlet of an indoor air inlet pipe and is exhausted outdoors through the heat exchange core, the exhaust fan and the outdoor exhaust pipe, and the indoor exhaust air exchanges heat with outdoor fresh air in the heat exchange core to preheat the outdoor fresh air;
s32, the control center adjusts the rotating speed of the exhaust fan according to the concentration of the indoor carbon dioxide, and when the concentration of the indoor carbon dioxide is higher than a set value, the control center improves the rotating speed of the exhaust fan, accelerates the exhaust of indoor gas, increases the introduction amount of fresh air and reduces the concentration of the indoor carbon dioxide;
s33, judging whether a humidifier in the indoor unit is opened or not according to the absolute humidity of the return air, and controlling the humidifier to be opened by the control center when the absolute humidity of the return air is lower than a set value;
and S34, controlling the working states of the compressor and the electronic expansion valve of the outdoor unit according to a PID algorithm to adjust the heating quantity.
2. The control method of the integrated environment control machine for the low-energy-consumption house according to claim 1, wherein the step S1 controls whether the indoor needs to be cooled or heated specifically by:
s11, after starting up, when detecting that the indoor actual temperature Ts is greater than the set temperature Th, adjusting the four-way valve to a 0-gear, conducting a port a and a port b in the four-way valve, starting a refrigeration mode, monitoring the working state of the compressor and the indoor actual temperature Ts in real time, when detecting that the working stop time of the compressor exceeds the set time T and Ts is greater than Th +0.5 ℃, adjusting the four-way valve to a 1-gear, conducting a port a and a port d in the four-way valve, and switching to the heating mode;
s12, when the fact that the indoor actual temperature Ts is smaller than the set temperature Th is detected, the four-way valve is adjusted to the 1-gear, the port a and the port d in the four-way valve are communicated, the heating mode is started, when the fact that the working stop time of the compressor exceeds the set time T and Ts +0.5 DEG < Th is detected, the four-way valve is adjusted to the 0-gear, the port a and the port b in the four-way valve are communicated, and the cooling mode is switched.
3. The control method of the low-energy-consumption residential environment control all-in-one machine according to claim 1, characterized in that: the time T set in step S1 is 1 hour.
4. The control method of the low-energy-consumption residential environment control all-in-one machine according to claim 1, characterized in that: in step S24, when it is determined that the indoor unit is in the cooling mode, the opening degree of the electronic expansion valve of the outdoor unit is controlled according to the state parameters in the return air and the wet air, and the cooling capacity is adjusted.
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