CN114087742B - New fan, control method thereof and computer readable storage medium - Google Patents

New fan, control method thereof and computer readable storage medium Download PDF

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Publication number
CN114087742B
CN114087742B CN202111406369.9A CN202111406369A CN114087742B CN 114087742 B CN114087742 B CN 114087742B CN 202111406369 A CN202111406369 A CN 202111406369A CN 114087742 B CN114087742 B CN 114087742B
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Prior art keywords
fresh air
control parameter
compressor
heat exchange
heat exchanger
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CN202111406369.9A
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CN114087742A (en
Inventor
徐振坤
刘步东
李金波
杜顺开
黄剑云
高卓贤
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan Refrigeration Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan Refrigeration Equipment Co Ltd
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Publication of CN114087742A publication Critical patent/CN114087742A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • 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
    • 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
    • F24F13/30—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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses a control method of a fresh air machine, which comprises the following steps: acquiring a heat exchange mode of the fresh air machine and acquiring a characteristic temperature; the characteristic temperature characterizes the temperature regulation requirement of fresh air; determining target control parameters of the heat exchange module according to the heat exchange mode and the characteristic temperature; and controlling the heat exchange module to operate according to the target control parameter so as to enable the heat dissipation capacity of the second heat exchanger to be matched with the fresh air temperature regulation requirement in the current heat exchange mode. The invention also discloses a fresh air machine and a computer readable storage medium. The invention aims to widen the application range of the fresh air machine, and realize that the fresh air outlet temperature of the fresh air machine can be adjusted to meet the indoor comfort requirement under any working condition.

Description

New fan, control method thereof and computer readable storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method for controlling a fresh air machine, and a computer readable storage medium.
Background
In recent years, with the improvement of the life quality of people, the quality of indoor air is increasingly emphasized. The fresh air unit is an important component of a room air conditioning system, and can send filtered outdoor fresh air into a room to replace polluted air on one hand; on the other hand, the fresh air can be subjected to heat-moisture treatment to bear part of room heat-moisture load.
The heat exchange module of the existing fresh air machine is generally provided with a heat pipe evaporator and a heat pipe condenser, and the heat pipe condenser is generally arranged in the fresh air duct and can adjust the fresh air temperature. The heat pipe evaporator absorbs heat from high-temperature air to change liquid refrigerant into gaseous refrigerant, the liquid refrigerant enters the heat pipe condenser under pressure difference and is condensed into liquid refrigerant through low-temperature air, and the liquid refrigerant flows into the heat pipe evaporator under the siphon effect generated by the flow of the throttling component to complete the heat pipe circulation.
However, at present, a heat exchange module in a fresh air machine is generally controlled according to fixed parameters, so that the temperature regulation application range of the fresh air machine is too narrow, and when the operation working condition of the fresh air machine is easy to change, the heat provided by a heat pipe condenser for fresh air is not matched with the actual temperature regulation requirement of the fresh air, and the regulation effect of the fresh air machine on the fresh air outlet temperature is affected.
Disclosure of Invention
The invention mainly aims to provide a control method of a fresh air machine, the fresh air machine and a computer readable storage medium, and aims to widen the application range of the fresh air machine, and the fresh air outlet temperature of the fresh air machine can be adjusted to meet indoor comfort requirements under any working condition.
In order to achieve the above object, the present invention provides a control method of a fresh air fan, the fresh air fan includes a fresh air duct, an exhaust air duct, and a heat exchange module, the heat exchange module includes a first loop, the first loop includes a first heat exchanger, a first throttling device, and a second heat exchanger that are sequentially connected, the first heat exchanger is disposed in the exhaust air duct, the second heat exchanger is disposed in the fresh air duct, the control method of the fresh air fan includes the following steps:
Acquiring a heat exchange mode of the fresh air machine and acquiring a characteristic temperature; the characteristic temperature characterizes the temperature regulation requirement of fresh air;
determining target control parameters of the heat exchange module according to the heat exchange mode and the characteristic temperature;
and controlling the heat exchange module to operate according to the target control parameter so as to enable the heat dissipation capacity of the second heat exchanger to be matched with the fresh air temperature regulation requirement in the current heat exchange mode.
Optionally, the heat exchange module further includes a compressor connected to the first circuit, and the step of determining the target control parameter of the heat exchange module according to the heat exchange mode and the characteristic temperature includes:
when the heat exchange mode is a heating mode, determining a first control parameter according to the characteristic temperature; the first control parameter is used for adjusting the heat dissipation capacity of the second heat exchanger;
determining that the target control parameter includes the first control parameter and a second control parameter; the second control parameter comprises the steps of starting the compressor and opening the first throttling device, and when the compressor is started and the first throttling device is started, the refrigerant in the heat exchange module circularly flows between the compressor and the first loop.
Optionally, the heat exchange module further includes a solenoid valve and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the second control parameter further includes opening the solenoid valve.
Optionally, the step of determining the first control parameter according to the characteristic temperature includes:
when the characteristic temperature is larger than a first set temperature, determining at least one of the following parameters as the first control parameter:
reducing the operating frequency of the compressor;
the operation rotating speed of an exhaust fan is reduced, and the exhaust fan is arranged in the exhaust air duct;
increasing the opening degree of the first throttle device;
the running rotating speed of the fresh air fan is improved, and the fresh air fan is arranged in the fresh air duct.
Optionally, the step of determining the first control parameter according to the characteristic temperature includes:
when the characteristic temperature is smaller than a first set temperature, at least one of the following parameters is determined as the first control parameter:
increasing the operating frequency of the compressor;
the operation rotating speed of an exhaust fan is improved, and the exhaust fan is arranged in the exhaust air duct;
Reducing the opening degree of the first throttle device;
the running rotating speed of the fresh air fan is reduced, and the fresh air fan is arranged in the fresh air duct.
Optionally, the step of determining the target control parameter of the heat exchange module according to the heat exchange mode and the characteristic temperature includes:
when the heat exchange mode is a refrigeration mode and the characteristic temperature is greater than a second set temperature, determining that the target control parameters comprise a third control parameter and a fourth control parameter;
when the heat exchange mode is a refrigeration mode and the characteristic temperature is smaller than the second set temperature, determining that the target control parameters comprise a fifth control parameter and a sixth control parameter, or determining that the target control parameters comprise a seventh control parameter;
the third control parameter is used for reducing the heat dissipation capacity of the second heat exchanger, the fourth control parameter and the sixth control parameter are both used for driving the refrigerant to flow in the first loop, the fifth control parameter is used for improving the heat dissipation capacity of the second heat exchanger, and the seventh control parameter is used for stopping the refrigerant from flowing in the first loop.
Optionally, the heat exchange module includes an exhaust fan disposed in the exhaust air duct, the third control parameter includes reducing an operation rotation speed of the exhaust fan, and the fifth control parameter includes increasing the operation rotation speed of the exhaust fan.
Optionally, the heat exchange module further includes a solenoid valve, a compressor and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the sixth control parameter includes one of the following parameters:
closing the compressor and opening the solenoid valve;
the compressor is turned off and the first throttling means is turned off.
Optionally, the heat exchange module further includes a solenoid valve, a compressor and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the fourth control parameter includes one of the following parameters:
closing the compressor, closing the electromagnetic valve, and opening the first throttling device;
and opening the compressor, opening the electromagnetic valve and opening the first throttling device.
Optionally, when the fourth control parameter includes opening the compressor, opening the solenoid valve, and opening the first throttling device, the third control parameter includes decreasing an operating frequency of the compressor, and the fifth control parameter includes increasing the operating frequency of the compressor.
Optionally, the heat exchange module further includes a compressor connected to the first loop, and after the step of obtaining the heat exchange mode of the fresh air fan, the method further includes:
determining initial control parameters corresponding to the heat exchange mode; the initial control parameters are used for regulating and controlling the refrigerant circulation states in the first loop and the compressor;
and controlling the heat exchange module to operate according to the initial control parameters, and executing the step of acquiring the characteristic temperature.
Optionally, the heat exchange module further includes a solenoid valve and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the step of determining the initial control parameter corresponding to the heat exchange mode includes:
when the heat exchange mode is a refrigeration mode, determining a first operation parameter as the initial control parameter, wherein the first operation parameter comprises closing the compressor and opening the electromagnetic valve, or the first operation parameter comprises closing the compressor and closing the first throttling device;
And when the heat exchange mode is a heating mode, determining a second operation parameter as the initial control parameter, wherein the second operation parameter comprises the steps of starting the compressor, opening the electromagnetic valve and opening the first throttling device.
In addition, in order to realize above-mentioned purpose, this application still provides a new fan, new fan includes:
fresh air duct;
an exhaust air duct;
the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially connected, the first heat exchanger is arranged in the exhaust air duct, the second heat exchanger is arranged in the fresh air duct,
the control device, the heat transfer module with controlling means connects, controlling means includes: the system comprises a memory, a processor and a control program of the fresh air fan, wherein the control program of the fresh air fan is stored in the memory and can run on the processor, and the control program of the fresh air fan realizes the steps of the control method of the fresh air fan when being executed by the processor.
In addition, in order to achieve the above object, the present application further proposes a computer-readable storage medium, on which a control program of a fresh air machine is stored, which when executed by a processor, implements the steps of the control method of a fresh air machine as set forth in any one of the above.
The heat exchange module of the fresh air machine comprises a first loop, a first heat exchanger in the first loop is arranged in an air exhaust duct, a second heat exchanger in the first loop is arranged in a fresh air duct, the first heat exchanger can recover sensible heat exhausted in the air exhaust duct, a refrigerant after the sensible heat recovery further enters the second heat exchanger to regulate the temperature of fresh air, and a refrigerant flowing out of the second heat exchanger can enter the first heat exchanger to circulate again under the siphon action of a first throttling device.
Drawings
FIG. 1 is a schematic diagram of a fresh air machine according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a fresh air blower according to the present invention;
FIG. 3 is a schematic view of a structure of a fresh air machine according to another embodiment of the present invention;
FIG. 4 is a schematic view of a structure of a fresh air machine according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a hardware architecture involved in operation of an embodiment of the new wind turbine of the present invention;
FIG. 6 is a flow chart of an embodiment of a method for controlling a fresh air machine according to the present invention;
FIG. 7 is a flow chart of another embodiment of a method for controlling a fresh air machine according to the present invention;
FIG. 8 is a flow chart of a control method of a fresh air machine according to another embodiment of the present invention;
fig. 9 is a flowchart of a control method of a fresh air machine according to another embodiment of the present invention.
Reference numerals illustrate:
Figure BDA0003372370560000051
Figure BDA0003372370560000061
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The main solutions of the embodiments of the present invention are: based on a new fan, a control method is provided, the new fan includes a new wind channel, an exhaust wind channel and a heat exchange module, the heat exchange module includes a first loop, the first loop includes a first heat exchanger, a first throttling device and a second heat exchanger which are connected in sequence, the first heat exchanger is arranged in the exhaust wind channel, and the second heat exchanger is arranged in the new wind channel, the method includes: acquiring a heat exchange mode of the fresh air machine and acquiring a characteristic temperature; the characteristic temperature characterizes the temperature regulation requirement of fresh air; determining target control parameters of the heat exchange module according to the heat exchange mode and the characteristic temperature; and controlling the heat exchange module to operate according to the target control parameter so as to enable the heat dissipation capacity of the second heat exchanger to be matched with the fresh air temperature regulation requirement in the current heat exchange mode.
Because among the prior art, heat transfer module in the new fan generally controls according to fixed parameter, leads to new fan temperature regulation application scope to be too narrow, and this easy new fan's operating condition changes, and the heat that the heat pipe condenser provided for the new trend does not match with the actual temperature regulation demand of new trend, influences the regulation effect of new fan to new trend air-out temperature.
The invention provides the solution scheme, which aims to widen the application range of the fresh air machine and realize that the fresh air outlet temperature of the fresh air machine can be regulated to meet the indoor comfort requirement under any working condition.
The invention provides a new fan.
Referring to fig. 1, in an embodiment of the present invention, a fresh air fan includes: fresh air duct 1, exhaust air duct 2, heat transfer module 01 and dehumidification module.
The heat exchange module 01 comprises a first loop, wherein the first loop comprises a first heat exchanger 5, a first throttling device 12 and a second heat exchanger 6 which are sequentially connected in series.
The dehumidification module 4 is arranged independently of the first circuit. In the present embodiment, the dehumidification module 4 is specifically a heat exchanger in an evaporated state. In other embodiments, the dehumidifying module 4 may also be any module having a dehumidifying function, such as a desiccant-loaded module or the like.
The first heat exchanger 5 set up in the wind channel 2 of airing exhaust, the second heat exchanger 6 with dehumidification module 8 set up in the fresh air wind channel 1, and dehumidification module 8 and second heat exchanger 6 are in arrange in proper order on the fresh air flow path in the fresh air wind channel 1, the fresh air that enters into in the fresh air wind channel 1 from the outdoor passes through dehumidification module 8 and second heat exchanger 6 in proper order, dehumidification module 8 can cool down the dehumidification to the fresh air.
Further, the heat exchange module 01 may further include an exhaust fan 3 and a fresh air fan 4 disposed in the exhaust air duct 2 and the fresh air duct 1 respectively, where the exhaust fan 3 is used to suck indoor air into the exhaust air duct 2 and exhaust the air to the outside, and the fresh air fan 4 is used to suck outdoor air into the fresh air duct 1 and exhaust the air to the inside.
Judging whether the fresh air needs to be dehumidified and reheated or not and the degree of dehumidification and reheating is determined by judging the temperature of the exhaust air at the inlet of the exhaust air duct 2 and the temperature of the fresh air at the inlet of the fresh air duct 1, and running in the most suitable mode under different working conditions; and meanwhile, the first heat exchanger is arranged in the exhaust channel 2, and sensible heat of exhaust air is recovered, so that an energy-saving effect is achieved.
The refrigerant in the first heat exchanger 5 in the exhaust air duct 2 can recycle the heat of the air in the exhaust air duct 2, the refrigerant with recycled heat flows into the second heat exchanger 6 to heat the air in the fresh air duct 1, and the refrigerant flowing out of the second heat exchanger 6 enters the first heat exchanger 5 to absorb heat again after the siphon action of the first throttling device 12, so that the heat pipe circulation is completed. Because the heat for heating the fresh air is obtained through recovering the exhaust heat, the fresh air cooled and dehumidified is reheated, so that the temperature of the fresh air outlet is prevented from being too low, the energy consumption is saved, and the temperature of the fresh air outlet is ensured to meet the indoor comfort requirement.
In an embodiment, the dehumidification module 8 is provided with a cold water inlet and a cold water outlet, the cold source for cooling and dehumidifying the dehumidification module 8 is cold water, and the circulating flow of the cold water in the dehumidification module 8 is realized through an external cold water source, so that the effect of continuously cooling and dehumidifying fresh air is achieved.
In other embodiments, the dehumidifying module 8 may not be disposed in the fresh air duct 1.
With continued reference to fig. 1, in an embodiment, the heat exchange module 01 may further include the electromagnetic valve 22, the first compressor 16, and the first check valve 20 disposed between the refrigerant outlet of the first heat exchanger 5 and the refrigerant inlet of the second heat exchanger 6, wherein the first compressor 16 is connected in parallel with the first check valve 20, and the electromagnetic valve 22 is connected in series with the first compressor 16. Based on this, when the fresh air reheat amount of heat pipe circulation is insufficient, can switch to the heat pump circulation that realizes based on first compressor 16 and heat the fresh air, be favorable to improving the adaptability of fresh air machine to different operating mode conditions, be favorable to guaranteeing when fresh air temperature is lower or higher and can both guarantee that the heat pipe fan is energy-conserving, can adjust the humiture of fresh air to reach indoor user's comfort level simultaneously.
Specifically, the first circuit is externally connected with a first compressor 16, the outlet of the first compressor 16 is communicated with the inlet of the second heat exchanger 6, the inlet of the first compressor 16 is communicated with the outlet of the first heat exchanger 5, a first check valve 20 which flows from the outlet of the first heat exchanger 5 to the inlet of the second heat exchanger 6 is connected in series on the first circuit, the first compressor 16 is connected with the first check valve 20 in parallel, a second check valve 21 is arranged on a pipeline of the first circuit, the outlet side of the first compressor 16 is connected with the inlet of the first circuit, and a solenoid valve 22 is arranged on a pipeline of the first circuit, the inlet side of the first compressor 16 is connected with the inlet of the second heat exchanger 6. The first compressor 16, the first throttling device 12 and the dehumidification module 8 are turned on and off to realize heat pump cycle dehumidification reheating or heat pipe cycle dehumidification reheating in different modes; the flow direction of the refrigerant in the fresh air machine in different modes is controlled by opening and closing the electromagnetic valve 22, and the first check valve 20 and the second check valve 21 limiting the flow direction.
Referring to fig. 2, in view of this, in another embodiment, a fifth heat exchanger 9 is further included, where the fifth heat exchanger 9 is disposed in the fresh air duct and is located downstream of the second heat exchanger 6 in the fresh air flow direction, and the fifth heat exchanger 9 can heat the fresh air. The fifth heat exchanger 9 is provided with a hot water inlet and a hot water outlet, a heat source for reheating the fresh air by the fifth heat exchanger 9 is hot water, and the circulating flow of the hot water in the fifth heat exchanger 9 is realized through an external hot water source, so that the effect of continuously reheating the fresh air is achieved. An electric heating device can be arranged in the fifth heat exchanger 9, and when the fifth heat exchanger 9 is started, the electric heating device starts to be electrified and generates heat, and the heat is transferred to fresh air, so that the effect of reheating the fresh air is achieved.
Referring to fig. 3, in yet another embodiment, the dehumidification module 8 includes a seventh heat exchanger 11, a third compressor 18 and a fourth throttling device 15, where the third compressor 18, the seventh heat exchanger 11, the fourth throttling device 15 and the fourth heat exchanger 81 are sequentially connected by pipes to form a circulation loop, the fourth heat exchanger 81 is disposed in a fresh air duct, and a cold source for cooling and dehumidifying the dehumidification module 8 is a refrigerant. The third compressor 18 converts the refrigerant into a high temperature and high pressure gas state, and then flows into the seventh heat exchanger 11, and the seventh heat exchanger 11 may be placed outdoors, and the temperature of the refrigerant is reduced after transferring heat to the outdoor air. After flowing out from the seventh heat exchanger 11, the refrigerant is converted into a low-temperature low-pressure state after passing through the fourth throttling device 15, then flows into the fourth heat exchanger 81, the low-temperature low-pressure refrigerant absorbs the heat of the fresh air and is gasified, and the gaseous refrigerant is led out of the fourth heat exchanger 81 and is sucked by the third compressor 18 for the next cycle.
Referring to fig. 4, in this view, in yet another embodiment, the dehumidifying module 8 may cool down and dehumidify the fresh air, the fifth heat exchanger 9 may reheat the fresh air, and the dehumidifying module 8 and the fifth heat exchanger 9 may form a thermal cycle after being communicated with each other and adding other devices. In view of this, in an embodiment, the dehumidification module 8 is a fourth heat exchanger 81, the fresh air fan further includes a sixth heat exchanger 10, a second compressor 17, and a second throttling device 13, the second compressor 17, the sixth heat exchanger 10, the fifth heat exchanger 9, the second throttling device 13, and the fourth heat exchanger 81 are sequentially connected by pipes to form a circulation loop, and the fifth heat exchanger 9 reheat the fresh air through refrigerant circulation. The second compressor 17 converts the refrigerant into a high temperature and high pressure gas state, and then flows into the sixth heat exchanger 10, and the sixth heat exchanger 10 may be placed outdoors, and the temperature of the refrigerant is reduced after transferring heat to the outdoor air. After flowing out from the sixth heat exchanger 10, the refrigerant flows into the fifth heat exchanger 9, the refrigerant transfers heat to the fresh air through the fifth heat exchanger 9, and the fresh air is sent into a room after being reheated to a proper temperature. After flowing out from the fifth heat exchanger 9, the refrigerant is converted into a low-temperature and low-pressure state by the second throttling device 13, then flows into the fourth heat exchanger 81, the low-temperature and low-pressure refrigerant absorbs the heat of the fresh air and is gasified, the moisture content of the fresh air in the heat absorption process is reduced, and the gaseous refrigerant is sucked by the second compressor 17 after being led out of the fourth heat exchanger 81, so that the next cycle is performed.
Further, a third throttling device 14 is disposed between the fifth heat exchanger 9 and the sixth heat exchanger 10. When the third throttling device 14 is opened and does not perform throttling, and the second throttling device 13 is opened and performs throttling, the heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 performs dehumidifying and reheating functions on fresh air as in the previous embodiment. When the third throttling means 14 is opened and performs a throttling function, and the second throttling means 13 is opened and does not perform a throttling function, the refrigerant flowing out of the sixth heat exchanger 10 is changed into a low temperature state after passing through the three stages of devices, and then flows into the fifth heat exchanger 9. At this time, the fifth heat exchanger 9 plays a role in cooling the fresh air, and the heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 plays a role in cooling and dehumidifying the fresh air. By adding the third throttling device 14, the heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 can switch between a dehumidifying and reheating function and a cooling and dehumidifying function, so that the applicable range is widened.
The fresh air can be dehumidified by the fresh air blower, so that the humidity of the fresh air after heat exchange is not changed, and the second heat exchanger 6 is not suitable for a hybrid heat exchanger, so that the change of the humidity caused by the mixed contact of the fresh air and the refrigerant is avoided. Typically, the second heat exchanger 6 is a regenerative heat exchanger or a dividing wall heat exchanger or a combination of both. In an embodiment, the second heat exchanger 6 is a plate heat exchanger, and the plate heat exchanger has high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, convenient installation and cleaning, wide application and long service life.
Further, based on any of the above embodiments, in an embodiment of the present invention, the fresh air machine may further include a control device. Referring to fig. 5, the heat exchange module 01 and the dehumidification module 8 may be connected to a control device. Specifically, the heat exchange module 01, the dehumidification module 8 and other components can be connected with a control device, and the control device can be used for controlling the operation of the heat exchange module 01, the dehumidification module 8 and other components.
Further, the fresh air fan may further include a temperature detection module 02 and/or a humidity detection module 03. The temperature detection module 02 can be used for detecting relevant temperature data required by the operation regulation of the fresh air fan. The temperature detection module 03 can be used for detecting relevant humidity data required by the operation regulation of the fresh air ventilator. The temperature detection module 02 and/or the humidity detection module 03 are connected with a control device, and the control device can be used for acquiring data detected by the temperature detection module 02 and/or the humidity detection module 03. Specifically, the temperature detection module 02 and the detection module 03 can be arranged at the outlet of the fresh air duct 1, the inlet of the fresh air duct 1, the front of the second heat exchanger 6 and the dehumidification module 8 in the fresh air duct 1, the indoor environment acted by the fresh air fan, the inlet of the exhaust air duct and/or the outlet of the exhaust air duct, etc.
In an embodiment of the present invention, referring to fig. 5, a control device of a fresh air machine includes: a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, and the like. The memory 1002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 may alternatively be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the device structure shown in fig. 5 is not limiting of the device and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 5, a control program of the fresh air machine may be included in a memory 1002 as a computer-readable storage medium. In the apparatus shown in fig. 5, a processor 1001 may be used to call a control program of the fresh air blower stored in a memory 1002 and perform the relevant step operations of the control method of the fresh air blower in the following embodiments.
The embodiment of the invention also provides a control method of the fresh air machine, which is applied to control the fresh air machine.
Referring to fig. 6, an embodiment of a control method of the fresh air machine is provided. In this embodiment, the method for controlling the fresh air machine includes:
Step S10, acquiring a heat exchange mode of the fresh air machine and acquiring a characteristic temperature; the characteristic temperature characterizes the temperature regulation requirement of fresh air;
the heat exchange mode may be specifically one of a cooling mode and a heating mode. The indoor environment has a cooling requirement in a refrigerating mode; the indoor environment has the heating requirement under the heating mode.
The characteristic temperature can be the air temperature detected on the fresh air machine or the air temperature detected by the indoor environment acted by the fresh air machine.
In an implementation manner, a fresh air outlet temperature of the fresh air fan is obtained, and the characteristic temperature comprises the fresh air outlet temperature. In another implementation, the ambient temperature of the fresh air mover application space is obtained, and the characteristic temperature includes the ambient temperature. In yet another implementation, an exhaust temperature of the fresh air mover is obtained, the characteristic temperature including the exhaust temperature. In yet another implementation, a coil temperature of the second heat exchanger is obtained, the characteristic temperature including the coil temperature. In yet another implementation, at least two of the fresh air outlet temperature, the ambient temperature, the exhaust temperature, and the coil temperature are obtained as target temperatures, and the characteristic temperature herein is calculated from the at least two target temperatures.
The heat exchange mode and the characteristic temperature can be acquired simultaneously or sequentially. Specifically, the heat exchange mode can be firstly obtained, and when the operation of the fresh air machine is controlled to reach the set condition according to the parameters corresponding to the heat exchange mode, the characteristic temperature is further obtained.
Specifically, when the new fan includes the dehumidification module, the dehumidification module can be in the open state in order to cool down the dehumidification to the new trend under the heat transfer mode.
Step S20, determining target control parameters of the heat exchange module according to the heat exchange mode and the characteristic temperature;
the target control parameter is specifically an operation control parameter of a fresh air fan related component for regulating and controlling fresh air heat exchange quantity (heating quantity or heat absorption quantity) of the heat exchange module.
The target control parameter may be a target temperature value of a relevant component for temperature adjustment of the fresh air (for example, a target value of a coil temperature of the second heat exchanger or a minimum temperature value allowed by a coil temperature of the third heat exchanger, etc.), and may be an operation parameter of a relevant component for temperature adjustment of the fresh air, for example, an operation rotation speed of a fan affecting temperature adjustment efficiency (for example, a rotation speed of a fresh air fan and/or a rotation speed of an exhaust fan), an opening degree of the first throttling device, a frequency control parameter of the compressor (for example, a target frequency value or a frequency adjustment direction, etc.), an on or off state of the compressor, and/or an on or off state of the electromagnetic valve, etc. In this embodiment, the target control parameter may include one or more than one of the parameters mentioned herein, and it is only necessary to ensure that the heat dissipation capacity supplied by the second heat exchanger is accurately matched with the actual temperature adjustment requirement of the current fresh air when the operation of the heat exchange module is controlled according to the target control parameter.
The heat exchange modes are different, the target control parameters are different when the characteristic temperatures are different, and the heat quantity supplied by the heat exchange module to fresh air in the fresh air duct is different when the target control parameters are different. Specifically, a corresponding relation among the heat exchange mode, the characteristic temperature and the target control parameter can be established in advance, and the current characteristic temperature and the control parameter corresponding to the heat exchange mode are determined as the target control parameter according to the corresponding relation. Specifically, a first correspondence relationship (may be in a form of a calculation formula, a mapping relationship, etc.) between the characteristic temperature and the control parameter may be obtained based on the heat exchange modes, the first correspondence relationships associated with different heat exchange modes are different, the first correspondence relationship corresponding to the current heat exchange mode is determined to be a target correspondence relationship, and the control parameter corresponding to the characteristic temperature in the target correspondence relationship is determined to be a target control parameter. In addition, a first sub-control parameter of a refrigerant circulation mode of the heat exchange module can be determined according to the heat exchange mode, a second sub-control parameter of the heat exchange module for fresh air heat exchange amount can be determined according to the characteristic temperature, and the first sub-control parameter and the second sub-control parameter can be determined as target control parameters.
And step S30, controlling the heat exchange module to operate according to the target control parameter so as to enable the heat dissipation capacity of the second heat exchanger to be matched with the fresh air temperature regulation requirement in the current heat exchange mode.
Specifically, the operation of the corresponding components (such as the fresh air fan, the exhaust fan, the compressor, the first throttling device and/or the electromagnetic valve, etc.) related to the heat dissipation capacity in the heat exchange module can be controlled according to the target control parameters.
The embodiment of the invention provides a control method of a fresh air machine, a heat exchange module of the fresh air machine comprises a first loop, a first heat exchanger in the first loop is arranged in an air exhaust air duct, a second heat exchanger in the first loop is arranged in the fresh air duct, the first heat exchanger can recover sensible heat exhausted in the air exhaust air duct, a refrigerant after recovering the sensible heat further enters the second heat exchanger to regulate the temperature of fresh air, a refrigerant flowing out of the second heat exchanger can enter the first heat exchanger to circulate again under the siphon action of a first throttling device, and based on the fresh air machine, the method is suitable for regulating and controlling the operation of the heat exchange module according to a heat exchange mode of the fresh air machine and a characteristic temperature representing the fresh air temperature regulation requirement, and the heat exchange module is not controlled according to fixed parameters, so that the fresh air outlet temperature of the fresh air can be regulated effectively even if the operation working condition of the fresh air machine changes, the application range of the fresh air machine is widened effectively, and the fresh air outlet temperature of the fresh air can be regulated to meet indoor comfort requirement under any working condition.
Further, based on the above embodiment, another embodiment of the control method of the fresh air machine is provided. In this embodiment, the heat exchange module further includes a compressor connected to the first loop, where the compressor is specifically connected to the first loop through a switching module, and the switching module is used to control the fresh air fan to switch between a first state and a second state, where the first state is where the compressor drives the refrigerant in the first loop to flow, and the second state is where the compressor stops driving the refrigerant in the first loop to flow. Based on this, referring to fig. 7, the step S20 includes:
step S21, when the heat exchange mode is a heating mode, determining a first control parameter according to the characteristic temperature; the first control parameter is used for adjusting the heat dissipation capacity of the second heat exchanger;
step S22, determining that the target control parameters comprise the first control parameters and the second control parameters; the second control parameter includes turning on the compressor and turning on the first throttling device.
And when the compressor is started and the first throttling device is started, the refrigerant in the heat exchange module circularly flows between the compressor and the first loop.
Specifically, the compressor may be turned on when the compressor is currently switched from the off state to the on state, or may be turned on when the compressor is currently in the on state. The opening of the first throttling device may be when the first throttling device is currently switched from the closed state to the open state, or when the compressor is currently in the open state, the first throttling device may be kept in the open state.
When the compressor and the first throttling device are both started, the fresh air machine is in a heat pump circulation state, and the first control parameter is specifically an operation control parameter of a related component for increasing or decreasing the heat dissipation capacity of the second heat exchanger in the heat pump circulation state.
Different characteristic temperatures correspond to different first control parameters, and the adjustment directions of the heat dissipation capacity of the second heat exchanger corresponding to the different first control parameters are different. Specifically, the first control parameter may include a frequency adjustment direction (increasing frequency or decreasing frequency) of the compressor, a rotational speed adjustment direction (increasing rotational speed or decreasing rotational speed) of the fresh air fan, a rotational speed adjustment direction (increasing rotational speed or decreasing rotational speed) of the exhaust fan, and/or an opening adjustment direction (increasing opening or decreasing opening) of the first throttling device, etc.
In this embodiment, according to the operation of second control parameter control heat exchange module under the heating mode, make the new fan of heat pump can heat the new trend by heat pump cycle's mode, be favorable to guaranteeing that the new fan of heat pump can improve the heat demand of enough big heat assurance new trend, cooperate first control parameter to regulate and control the operation of heat exchange module on this basis, be favorable to guaranteeing to regulate and control the new trend to required temperature under the heating mode accurately to satisfy indoor user travelling comfort.
Further, in this embodiment, the heat exchange module further includes a solenoid valve and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the second control parameter further includes opening the solenoid valve. The switching of the fresh air machine between the heat pump circulation state and the heat pipe circulation state can be realized through the cooperation of the electromagnetic valve and the first one-way valve.
Specifically, when the compressor is currently in an open state, the electromagnetic valve is currently in an open state, and the first throttling device is currently in an open state, the fresh air fan is in a heat pump cycle state: the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor and enters the second heat exchanger to heat fresh air, the refrigerant subjected to heat exchange with the fresh air enters the first heat exchanger to evaporate after being throttled by the first throttling device, sensible heat in the exhaust air duct can be recovered by the first heat exchanger, and the pressure difference at two ends of the first one-way valve is 0 due to the opening of the electromagnetic valve, so that the refrigerant flowing out of the first heat exchanger does not flow through the first one-way valve but flows back to the compressor to be recompressed by the electromagnetic valve. When the compressor is in a closed state, the electromagnetic valve is in a closed state, and the first throttling device is in an open state, the fresh air fan is in a heat pipe circulation state: the refrigerant in the first loop is not compressed in the compressor any more due to the closing of the compressor and the electromagnetic valve, a certain pressure difference is formed at two sides of the first one-way valve due to the closing of the electromagnetic valve, the refrigerant flows from one side of the first one-way valve to the other side of the first one-way valve under the driving of the certain pressure difference, the refrigerant circularly flows in the first loop, and the refrigerant heats fresh air in the fresh air duct when flowing into the second heat exchanger. The heat dissipation capacity of the second heat exchanger under the heat pump cycle is greater than the heat dissipation capacity of the second heat exchanger under the heat pipe cycle.
Based on this, through first check valve, solenoid valve and compressor cooperation, can realize that the heat pipe fan can switch to the heat pump cycle under the heating mode in order to provide great heat enough for fresh air temperature regulation.
In other embodiments, when the heat exchange module uses the switching module other than the first check valve and the electromagnetic valve to connect the compressor to the first loop, the second control parameter may also include control modes of other related components, and only needs to ensure that the compressor is connected to the first loop to form a heat pump cycle.
Further, in this embodiment, the step of determining the first control parameter according to the characteristic temperature includes: when the characteristic temperature is larger than a first set temperature, determining at least one of the following parameters as the first control parameter:
parameter 1, reducing the operating frequency of the compressor;
the parameter 2 is used for reducing the running rotating speed of an exhaust fan, and the exhaust fan is arranged in the exhaust air duct;
a parameter 3 that increases the opening degree of the first throttle device;
and 4, improving the running rotating speed of the fresh air fan, wherein the fresh air fan is arranged in the fresh air duct.
Specifically, the first control parameter may be parameter 1, parameter 2, parameter 3 or parameter 4; the first control parameter may also be parameter 1 and parameter 3; the first control parameter may also be parameter 1 and parameter 2; the first control parameter may also be parameter 1 and parameter 4; the second control parameters may also be parameter 1, parameter 2 and parameter 3; the second control parameters may also be parameter 1, parameter 3 and parameter 4; the second control parameters may also be parameter 1, parameter 2, parameter 4, etc.
Wherein, when the compressor is in the current on state, the first control parameter can be determined to comprise a parameter 1, and the compressor is controlled to reduce the frequency on the basis of the current frequency; when the exhaust fan is in an on state, a first control parameter including a parameter 2 can be determined, and the exhaust fan is controlled to reduce the rotating speed on the basis of the current rotating speed; in a state that the first throttling device is opened, determining that the first control parameters comprise a parameter 3, and controlling the first throttling device to increase the opening degree on the basis of the current opening degree; when the current fresh air fan is in an opening state, the first control parameters including the parameter 4 can be determined, and the fresh air fan is controlled to increase the rotating speed on the basis of the current rotating speed. When the heating mode is started, the exhaust fan, the fresh air fan, the first throttling device and the compressor can be controlled to be started, and then the step S10 can be executed.
The first set temperature is specifically a target temperature value which is required to be reached by the fresh air outlet temperature in a preset heating mode.
In the process of reducing the frequency of the compressor, reducing the running rotating speed of the exhaust fan, improving the opening degree of the first throttling device and/or improving the running rotating speed of the fresh air fan, the frequency, the rotating speed and/or the opening degree can be adjusted according to the preset fixed adjusting parameters and the corresponding adjusting directions, and the frequency of the compressor, the running rotating speed of the fresh air fan, the running rotating speed of the exhaust fan and/or the opening degree of the first throttling device can also be adjusted according to the adjusting parameters determined by the actual running condition of the fresh air fan. In this embodiment, the first rotational speed adjustment range of the fresh air fan, the second rotational speed adjustment range, the frequency adjustment range and/or the opening adjustment range of the air exhaust fan may be determined according to the air exhaust temperature, the fresh air temperature, the first coil temperature of the first heat exchanger, the second coil temperature of the second heat exchanger and the second set temperature, the compressor operating frequency is reduced according to the determined frequency adjustment range, the operating rotational speed of the air exhaust fan is reduced according to the determined second rotational speed adjustment range, the opening of the first throttling device is increased according to the determined opening adjustment parameter and/or the operating rotational speed of the fresh air fan is increased according to the determined first rotational speed adjustment range.
Through the above-mentioned at least one parameter as first control parameter control heat transfer module operation in heat pump cycle in-process, can effectively reduce the heat dissipation capacity of second heat exchanger to new trend air-out temperature can reduce to the first settlement temperature that satisfies indoor comfortable demand, can adjust new fan to satisfying indoor comfortable demand with new trend air-out temperature accurately under the assurance heating mode.
Further, in this embodiment, the step of determining the first control parameter according to the characteristic temperature may further include: when the characteristic temperature is smaller than a first set temperature, at least one of the following parameters is determined as the first control parameter:
when the characteristic temperature is smaller than a first set temperature, at least one of the following parameters is determined as the first control parameter:
a parameter 5, increasing the operating frequency of the compressor;
parameter 6, the running rotating speed of an exhaust fan is increased, and the exhaust fan is arranged in the exhaust air duct;
a parameter 7 for reducing the opening degree of the first throttle device;
and the parameter 8 is used for reducing the running rotating speed of the fresh air fan, and the fresh air fan is arranged in the fresh air duct.
Specifically, the first control parameter may be parameter 5, parameter 6, parameter 7 or parameter 8; the first control parameters may also be parameter 5 and parameter 8; the first control parameters may also be parameter 5 and parameter 6; the first control parameters may also be parameter 5 and parameter 7; the second control parameters may also be parameter 5, parameter 6 and parameter 8; the second control parameters may also be parameter 5, parameter 8 and parameter 7; the second control parameters may also be parameter 5, parameter 6 and parameter 7, etc.
The method comprises the steps that when a compressor is in a current starting state, a first control parameter including a parameter 1 can be determined, and the compressor is controlled to increase frequency on the basis of the current frequency; when the exhaust fan is in an on state, a first control parameter including a parameter 2 can be determined, and the exhaust fan is controlled to increase the rotating speed on the basis of the current rotating speed; in a state that the first throttling device is opened, determining that the first control parameters comprise a parameter 3, and controlling the first throttling device to reduce the opening degree on the basis of the current opening degree; when the current fresh air fan is in an open state, the first control parameters including the parameter 4 can be determined, and the fresh air fan is controlled to reduce the rotating speed on the basis of the current rotating speed. When the heating mode is started, the exhaust fan, the fresh air fan, the first throttling device and the compressor can be controlled to be started, and then the step S10 can be executed.
In the process of increasing the frequency of the compressor, increasing the running rotating speed of the air exhaust fan, reducing the opening of the first throttling device and/or reducing the running rotating speed of the fresh air fan, the frequency, the rotating speed and/or the opening can be adjusted according to the preset fixed adjusting parameters and the corresponding adjusting directions, and the frequency of the compressor, the running rotating speed of the fresh air fan, the running rotating speed of the air exhaust fan and/or the opening of the first throttling device can also be adjusted according to the adjusting parameters determined by the actual running condition of the fresh air fan. In this embodiment, the first rotational speed adjustment range of the fresh air fan, the second rotational speed adjustment range, the frequency adjustment range and/or the opening adjustment range of the air exhaust fan may be determined according to the air exhaust temperature, the fresh air temperature, the first coil temperature of the first heat exchanger, the second coil temperature of the second heat exchanger and the second set temperature, the compressor operating frequency is increased according to the determined frequency adjustment range, the air exhaust fan operating rotational speed is increased according to the determined second rotational speed adjustment range, the opening of the first throttling device is reduced according to the determined opening adjustment parameter and/or the operating rotational speed of the fresh air fan is reduced according to the determined first rotational speed adjustment range.
Through the above-mentioned at least one parameter as first control parameter control heat transfer module operation in heat pump cycle in-process, can effectively improve the heat dissipation capacity of second heat exchanger to new trend air-out temperature can improve to the first settlement temperature that satisfies indoor comfortable demand, can adjust new fan to satisfying indoor comfortable demand with new trend air-out temperature accurately under the assurance heating mode.
Further, based on any one of the above embodiments, another embodiment of the control method of the fresh air machine is provided. In this embodiment, referring to fig. 8, the step S20 further includes:
step S23, when the heat exchange mode is a refrigeration mode and the characteristic temperature is greater than a second set temperature, determining that the target control parameters comprise a third control parameter and a fourth control parameter; the third control parameter is used for reducing the heat dissipation capacity of the second heat exchanger, and the fourth control parameter is used for driving the refrigerant to flow in the first loop;
step S24, when the heat exchange mode is a cooling mode and the characteristic temperature is less than the second set temperature, determining that the target control parameter includes a fifth control parameter and a sixth control parameter, or determining that the target control parameter includes a seventh control parameter; the sixth control parameter is used for driving the refrigerant to flow in the first loop, the fifth control parameter is used for improving the heat dissipation capacity of the second heat exchanger, and the seventh control parameter is used for stopping the refrigerant from flowing in the first loop.
The second set temperature is specifically a target value which is required to be reached by the fresh air outlet temperature in a preset refrigeration mode. The second set temperature may be less than the first set temperature in the above-described embodiments.
Specifically, the third control parameter and the fifth control parameter may include adjustment parameters corresponding to the compressor, the fresh air fan, the exhaust fan and/or the first throttling device, respectively.
Regarding the third control parameter and the fifth control parameter, in an embodiment, the heat exchange module includes an exhaust fan disposed in the exhaust air duct, the third control parameter includes reducing an operation rotation speed of the exhaust fan, and the fifth control parameter includes increasing the operation rotation speed of the exhaust fan. In another embodiment, the heat exchange module further includes a solenoid valve, a compressor, and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the third control parameter includes reducing an operating frequency of the compressor, and the fifth control parameter includes increasing the operating frequency of the compressor. In still another embodiment, the heat exchange module includes the exhaust fan and the compressor, and if the fourth control parameter includes that the compressor is turned on, the third control parameter includes that the operation rotation speed of the exhaust fan is reduced and the operation frequency of the compressor is reduced; if the sixth control parameter includes the start of the compressor, the fifth control parameter includes increasing the operation speed of the exhaust fan and increasing the operation frequency of the compressor.
Regarding a fourth control parameter, in this embodiment, the heat exchange module further includes a solenoid valve, a compressor, and a first check valve, where the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the fourth control parameter includes one of the following parameters:
a parameter A, closing the compressor, closing the electromagnetic valve and opening the first throttling device;
and B, starting the compressor, opening the electromagnetic valve, and opening the first throttling device.
In other embodiments, the fourth control parameter may include opening the first throttling device when the heat exchange module does not include a compressor and a solenoid valve.
When the heat exchange module is controlled to operate according to the parameter A, the fresh air fan can exchange heat with the fresh air by adopting heat pipe circulation; when the heat exchange module is controlled to operate according to the parameter B, the fresh air fan can exchange heat with fresh air by adopting heat pump circulation.
Specifically, when the current compressor of the fresh air machine is in an open state and the electromagnetic valve is in an open state, namely, the fresh air machine is in a heat pump circulation state, the first control parameters can be determined to include the parameter A so that the fresh air machine can be switched from the heat pump circulation state to the heat pipe circulation state for operation, and the first control parameters can also be determined to include the parameter B, namely, the fresh air machine can be maintained to operate in the heat pump circulation state; when the current compressor of the fresh air machine is in a closed state and the electromagnetic valve is in a closed state, the first control parameters including the parameter B can be determined to enable the fresh air machine to be switched from the heat pipe circulation state to the heat pump circulation state for operation, and the first control parameters including the parameter A can also be determined, namely, the fresh air machine maintains the heat pipe circulation state for operation.
When the characteristic temperature is smaller than a second set temperature, the detection temperature between the dehumidification module and the second heat exchanger can be obtained, the temperature deviation between the detection temperature and the preset temperature is determined, and when the detection temperature is smaller than the preset temperature and the temperature deviation is smaller than or equal to a set threshold value, the parameter A can be used as a fourth control parameter; when the detected temperature is less than the preset temperature and the temperature deviation is greater than the set threshold, the parameter B may be used as the fourth control parameter. Based on the method, when the required reheat amount is smaller, the fresh air is subjected to reheat treatment through the heat pipe circulation, so that the energy consumption of the fresh air machine can be effectively reduced while the fresh air outlet temperature can be ensured to accurately reach the second set temperature; when the heat is high, the fresh air is subjected to reheat treatment through the heat pump cycle, so that the fresh air can be ensured to provide enough reheat quantity to quickly adjust the fresh air to the second set temperature, the temperature of the fresh air outlet is prevented from being too low, and the comfort of a user is ensured. When the characteristic temperature is higher than the second set temperature, the parameter A can be determined to be a fourth control parameter so as to effectively limit the reheating quantity of the fresh air and avoid the overhigh temperature of the fresh air outlet, so that the indoor comfort requirement under the refrigeration mode can be met by the temperature of the fresh air outlet.
Specifically, when the fourth control parameter includes the parameter B, the third control parameter includes reducing the operation frequency of the compressor and/or reducing the operation rotation speed of the exhaust fan, and the fifth control parameter includes increasing the operation frequency of the compressor and/or increasing the operation rotation speed of the exhaust fan. The heat exchange module is controlled to operate according to the parameter B, the fresh air machine is in a heat pump circulation state, the compressor and the exhaust fan are both in an open state, the heat exchange module is controlled to operate according to the third control parameter on the basis, the operating frequency is reduced on the basis of the current operating frequency of the compressor and/or the operating rotating speed is reduced on the basis of the current operating rotating speed of the exhaust fan, and the heat exchange amount of the fresh air can be further reduced by the fresh air machine in the heat pump circulation state, so that the fresh air outlet temperature is reduced. In addition, the heat exchange module is controlled to operate according to the parameter B, the fresh air machine is in a heat pump circulation state, the compressor and the exhaust fan are both in an open state, on the basis, the heat exchange module is controlled to operate according to the fifth control parameter, on the basis of the current operating frequency of the compressor, the frequency operation is improved and/or the rotating speed operation is improved on the basis of the current operating rotating speed of the exhaust fan, so that the heat exchange capacity of the fresh air machine on the fresh air in the heat pump circulation state can be further improved, and the fresh air outlet temperature is improved.
When the fourth control parameter includes the parameter a, the third control parameter may include reducing an operation speed of the exhaust fan, and the fifth control parameter may include increasing the operation speed of the exhaust fan. The heat exchange module is controlled to operate according to the parameter A, the fresh air fan is in a heat pump circulation state, the compressor is in a closed state, the exhaust fans are all in an open state, on the basis, the heat exchange module is controlled to operate according to the third control parameter, the rotation speed is reduced on the basis of the current operation rotation speed of the exhaust fans, the heat exchange amount of the heat exchange module to fresh air can be reduced, and therefore the fresh air outlet temperature is reduced; according to the fifth control parameter, the heat exchange module is controlled to operate, the frequency operation is reduced on the basis of the current operation frequency of the compressor, and the heat exchange amount of the heat exchange module to fresh air can be improved, so that the fresh air outlet temperature is improved.
Regarding a sixth control parameter, in this embodiment, the heat exchange module further includes a solenoid valve, a compressor, and a first check valve, where the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the sixth control parameter includes one of the following parameters: closing the compressor and opening the solenoid valve; the compressor is turned off and the first throttling means is turned off. In other embodiments, the sixth control parameter may also include closing the first throttling means when the heat exchange module does not include a compressor and a solenoid valve. Based on this, can realize the refrigerant circulation interruption in the heat transfer module to can be fast with new trend air-out temperature down-regulation to the second settlement temperature under the assurance refrigeration mode, with indoor comfortable demand under the refrigeration mode.
When the characteristic temperature is larger than the second set temperature, determining the temperature deviation between the characteristic temperature and the second set temperature, and if the temperature deviation is larger than a preset threshold value, determining that the target control parameters comprise a seventh control parameter; if the temperature deviation is less than or equal to the preset threshold, it may be determined that the target control parameters include a fifth control parameter and a sixth control parameter.
In this embodiment, the target control parameters of the heat exchange module are determined according to the above manner, which is favorable for ensuring that fresh air can be accurately regulated and controlled to a required temperature in a refrigeration mode, so as to satisfy indoor user comfort.
Further, based on any one of the above embodiments, another embodiment of the control method of the fresh air machine is provided. In this embodiment, the step of defining and acquiring the heat exchange mode of the fresh air machine is step S11, the step of defining and acquiring the characteristic temperature is step S12, and referring to fig. 9, after step S11, the method further includes:
step S101, determining initial control parameters corresponding to the heat exchange mode; the initial control parameters are used for regulating and controlling the refrigerant circulation states in the first loop and the compressor;
different heat exchange modes correspond to different initial control parameters. The initial control parameter is specifically one of a first operation parameter, a second operation parameter and a third operation parameter. The first operation parameter is used for controlling the refrigerant in the heat exchange module to stop circulating flow; the second operation parameter is used for controlling the heat exchange module to operate in a heat pump cycle state; the third operation parameter is used for controlling the heat exchange module to operate in a heat pipe circulation state.
In this embodiment, the heat exchange module further includes a solenoid valve and a first check valve, the first check valve is disposed between the refrigerant outlet of the first heat exchanger and the refrigerant inlet of the second heat exchanger, the compressor is connected in parallel with the first check valve, and the solenoid valve is connected in series with the compressor.
Wherein the first operating parameter comprises closing the compressor and opening the solenoid valve, or the first operating parameter comprises closing the compressor and closing the first throttling means. The electromagnetic valve is opened to enable the pressure difference of two sides of the first one-way valve to be 0, and the refrigerant does not circulate in the first loop under the driving of the condition that the compressor is not opened and the pressure difference does not exist at two ends of the first one-way valve, and at the moment, the second heat exchanger stops radiating to fresh air; when the compressor is turned off and the first throttling device is turned off, the refrigerant cannot circulate in the first loop under the blocking of the first throttling device, and at the moment, the second heat exchanger stops radiating heat to fresh air.
The second operating parameters include opening the compressor, opening the solenoid valve, and opening the first throttling device, when the fresh air machine is operating in a heat pump cycle: the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor and enters the second heat exchanger to heat fresh air, the refrigerant subjected to heat exchange with the fresh air enters the first heat exchanger to evaporate after being throttled by the first throttling device, sensible heat in the exhaust air duct can be recovered by the first heat exchanger, and the pressure difference at two ends of the first one-way valve is 0 due to the opening of the electromagnetic valve, so that the refrigerant flowing out of the first heat exchanger does not flow through the first one-way valve but flows back to the compressor to be recompressed by the electromagnetic valve.
The third operating parameter includes closing the compressor, closing the solenoid valve, and opening the first throttle device, when the fresh air machine is operating in a heat pipe cycle state: the refrigerant in the first loop is not compressed in the compressor any more due to the closing of the compressor and the electromagnetic valve, a certain pressure difference is formed at two sides of the first one-way valve due to the closing of the electromagnetic valve, the refrigerant flows from one side of the first one-way valve to the other side of the first one-way valve under the driving of the certain pressure difference, the refrigerant circularly flows in the first loop, and the refrigerant heats fresh air in the fresh air duct when flowing into the second heat exchanger.
The heat dissipation capacity of the second heat exchanger under the heat pump cycle is greater than the heat dissipation capacity of the second heat exchanger under the heat pipe cycle. Specifically, when the fresh air fan is started and operated, the above step S11 may be executed, where the compressor is in a closed state, the electromagnetic valve is in a closed state, and the first throttling device is in a closed state in a fresh air fan off state (i.e., in an initial state of starting). The closing of the compressor referred to in the above-mentioned operating parameters means that the compressor maintains a current closed state, the opening of the solenoid valve means that the solenoid valve is switched from the closed state to the open state, the closing of the first throttle means that the first throttle means maintains a current closed state, the opening of the compressor means that the compressor is switched from the closed state to the open state, and the opening of the first throttle means that the first throttle means is switched from the closed state to the open state.
In this embodiment, when the heat exchange mode is the cooling mode, the first operation parameter is determined to be the initial control parameter. Wherein, dehumidification module can open under the refrigeration mode. Based on the method, the cooling mode can be ensured to stop heating fresh air by interrupting the refrigerant circulation, so that the rapid cooling of the indoor environment is realized, and the indoor temperature drop requirement is met. And when the heat exchange mode is a heating mode, determining a second operation parameter as the initial control parameter, wherein the second operation parameter comprises the steps of starting the compressor, opening the electromagnetic valve and opening the first throttling device. Wherein, dehumidification module can close under the heating mode. Based on this, can guarantee through heat pump cycle that heating mode can provide enough heat and heat new trend under, realize indoor environment's quick heating to satisfy indoor heating travelling comfort.
In other embodiments, when the heat exchange mode is the cooling mode, the third operation parameter may be used as the initial control parameter; and when the heat exchange mode is a heating mode, taking the second operation parameter as an initial control parameter. Or when the heat exchange mode is a refrigeration mode, taking the first operation parameter as an initial control parameter; and when the heat exchange mode is a heating mode, taking the third operation parameter as an initial control parameter.
Step S102, controlling the heat exchange module to operate according to the initial control parameters, and executing the step of acquiring the characteristic temperature.
In this embodiment, the initial control parameters corresponding to the heat exchange mode are adapted to control the refrigerant circulation state of the heat exchange module, so as to improve the refrigerating or heating efficiency of the fresh air blower to the indoor environment; on this basis, still further be adapted to heat transfer mode and characteristic temperature and regulate and control the heat dissipation capacity of second heat exchanger to the new trend to can adjust the new trend air-out temperature to with indoor comfortable demand accurate matching when improving refrigeration or heating efficiency, further improve indoor travelling comfort.
In addition, the embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a control program of the fresh air machine, and the control program of the fresh air machine realizes the relevant steps of any embodiment of the control method of the fresh air machine when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a fresh air machine, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (11)

1. The control method of the fresh air machine is characterized in that the fresh air machine comprises a fresh air duct, an exhaust air duct and a heat exchange module, the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially connected, the first heat exchanger is arranged in the exhaust air duct, the second heat exchanger is arranged in the fresh air duct, the heat exchange module further comprises an electromagnetic valve, a compressor and a first one-way valve, the first one-way valve is arranged between a refrigerant outlet of the first heat exchanger and a refrigerant inlet of the second heat exchanger, the compressor is connected with the first loop, the compressor is connected with the first one-way valve in parallel, the electromagnetic valve is connected with the compressor in series, and the control method of the fresh air machine comprises the following steps:
acquiring a heat exchange mode of the fresh air machine and acquiring a characteristic temperature; the characteristic temperature characterizes the temperature regulation requirement of fresh air;
determining target control parameters of the heat exchange module according to the heat exchange mode and the characteristic temperature;
controlling the heat exchange module to operate according to the target control parameter so as to enable the heat dissipation capacity of the second heat exchanger to be matched with the fresh air temperature regulation requirement in the current heat exchange mode;
The step of determining the target control parameter of the heat exchange module according to the heat exchange mode and the characteristic temperature comprises the following steps:
when the heat exchange mode is a refrigeration mode and the characteristic temperature is greater than a second set temperature, determining that the target control parameters comprise a third control parameter and a fourth control parameter;
when the heat exchange mode is a refrigeration mode and the characteristic temperature is smaller than the second set temperature, determining that the target control parameters comprise a fifth control parameter and a sixth control parameter, or determining that the target control parameters comprise a seventh control parameter;
the third control parameter is used for reducing the heat dissipation capacity of the second heat exchanger, the fourth control parameter and the sixth control parameter are both used for driving the refrigerant to flow in the first loop, the fifth control parameter is used for improving the heat dissipation capacity of the second heat exchanger, and the seventh control parameter is used for stopping the refrigerant from flowing in the first loop;
the sixth control parameter includes one of the following:
closing the compressor and opening the solenoid valve;
closing the compressor and closing the first throttling means;
the fourth control parameter comprises one of the following:
Closing the compressor, closing the electromagnetic valve, and opening the first throttling device;
and opening the compressor, opening the electromagnetic valve and opening the first throttling device.
2. The method of controlling a fresh air machine according to claim 1, wherein the step of determining the target control parameter of the heat exchange module according to the heat exchange mode and the characteristic temperature comprises:
when the heat exchange mode is a heating mode, determining a first control parameter of the heat exchange module according to the characteristic temperature; the first control parameter is used for adjusting the heat dissipation capacity of the second heat exchanger;
determining that the target control parameter includes the first control parameter and a second control parameter; the second control parameter includes turning on the compressor and turning on the first throttling device.
3. The method of controlling a fresh air machine according to claim 2, wherein the second control parameter further comprises opening the solenoid valve.
4. The method of controlling a fresh air machine according to claim 2, wherein the step of determining the first control parameter based on the characteristic temperature includes:
when the characteristic temperature is larger than a first set temperature, determining at least one of the following parameters as the first control parameter:
Reducing the operating frequency of the compressor;
the operation rotating speed of an exhaust fan is reduced, and the exhaust fan is arranged in the exhaust air duct;
increasing the opening degree of the first throttle device;
the running rotating speed of the fresh air fan is improved, and the fresh air fan is arranged in the fresh air duct.
5. The method of controlling a fresh air machine according to claim 2, wherein the step of determining the first control parameter based on the characteristic temperature includes:
when the characteristic temperature is smaller than a first set temperature, at least one of the following parameters is determined as the first control parameter:
increasing the operating frequency of the compressor;
the operation rotating speed of an exhaust fan is improved, and the exhaust fan is arranged in the exhaust air duct;
reducing the opening degree of the first throttle device;
the running rotating speed of the fresh air fan is reduced, and the fresh air fan is arranged in the fresh air duct.
6. The method of claim 1, wherein the heat exchange module comprises an exhaust fan disposed in an exhaust duct, the third control parameter comprises reducing an operating speed of the exhaust fan, and the fifth control parameter comprises increasing the operating speed of the exhaust fan.
7. The method of controlling a fresh air machine according to claim 6, wherein when the fourth control parameter includes turning on the compressor, opening the solenoid valve, and opening the first throttling device, the third control parameter includes decreasing an operating frequency of the compressor, and the fifth control parameter includes increasing the operating frequency of the compressor.
8. The method for controlling a fresh air machine according to any one of claims 1 to 7, further comprising, after the step of acquiring the heat exchange pattern of the fresh air machine:
determining initial control parameters corresponding to the heat exchange mode; the initial control parameters are used for regulating and controlling the refrigerant circulation states in the first loop and the compressor;
and controlling the heat exchange module to operate according to the initial control parameters, and executing the step of acquiring the characteristic temperature.
9. The method of claim 8, wherein the step of determining the initial control parameters corresponding to the heat exchange mode comprises:
when the heat exchange mode is a refrigeration mode, determining a first operation parameter as the initial control parameter, wherein the first operation parameter comprises closing the compressor and opening the electromagnetic valve, or the first operation parameter comprises closing the compressor and closing the first throttling device;
And when the heat exchange mode is a heating mode, determining a second operation parameter as the initial control parameter, wherein the second operation parameter comprises the steps of starting the compressor, opening the electromagnetic valve and opening the first throttling device.
10. A new fan, characterized in that it comprises:
fresh air duct;
an exhaust air duct;
the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially connected, the first heat exchanger is arranged in the air exhaust air duct, the second heat exchanger is arranged in the fresh air duct, the heat exchange module further comprises an electromagnetic valve, a compressor and a first one-way valve, the first one-way valve is arranged between a refrigerant outlet of the first heat exchanger and a refrigerant inlet of the second heat exchanger, the compressor is connected with the first loop, the compressor is connected with the first one-way valve in parallel, and the electromagnetic valve is connected with the compressor in series;
the control device, the heat transfer module with controlling means connects, controlling means includes: memory, a processor and a control program of a fresh air machine stored on the memory and operable on the processor, which when executed by the processor, implements the steps of the method of controlling a fresh air machine according to any one of claims 1 to 9.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a control program of a fresh air machine, which when executed by a processor, implements the steps of the control method of a fresh air machine according to any one of claims 1 to 9.
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