CN114001437B - Control method, device and equipment of fresh air equipment and storage medium - Google Patents

Control method, device and equipment of fresh air equipment and storage medium Download PDF

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Publication number
CN114001437B
CN114001437B CN202111410276.3A CN202111410276A CN114001437B CN 114001437 B CN114001437 B CN 114001437B CN 202111410276 A CN202111410276 A CN 202111410276A CN 114001437 B CN114001437 B CN 114001437B
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Prior art keywords
heat exchange
exchange system
fresh air
temperature
heat exchanger
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CN114001437A (en
Inventor
徐振坤
高卓贤
刘步东
李金波
杜顺开
黄剑云
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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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Priority to CN202111410276.3A priority Critical patent/CN114001437B/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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Fuzzy Systems (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a control method, a control device, control equipment and a storage medium of fresh air equipment, and relates to the technical field of air processing equipment, wherein the fresh air equipment comprises a first heat exchange system and a second heat exchange system, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, and the second heat exchange system is used for exchanging heat between the fresh air channel and an exhaust channel; the method comprises the following steps: when the fresh air equipment is in heating operation, the first heat exchange system is controlled to run without frosting, and the second heat exchange system is controlled to run in heating operation; when the second heat exchange system meets the defrosting condition, the second heat exchange system is controlled to enter a defrosting mode, and the first heat exchange system keeps running without frosting. According to the invention, by controlling the first heat exchange system not to frost, even if the second heat exchange system is defrosted, the operation of at least one heat exchange system is ensured, so that the fresh air equipment can continuously provide fresh air, and the user experience is improved.

Description

Control method, device and equipment of fresh air equipment and storage medium
Technical Field
The invention relates to the technical field of air treatment, in particular to a control method, a control device, control equipment and a storage medium of fresh air equipment.
Background
At present, a heat pump system is integrated in fresh air equipment to adjust the temperature of fresh air. But the heat pump system needs to enter a defrost mode after frosting. Generally, in the defrosting mode, the heat pump system needs to be stopped, and normal temperature adjustment cannot be performed on fresh air. At this moment, new trend equipment can't influence user experience to indoor improvement new trend.
Disclosure of Invention
The invention mainly aims to provide a control method, a control device, control equipment and a storage medium of fresh air equipment, and aims to solve the technical problem that fresh air cannot be continuously provided when the fresh air equipment is defrosted in the prior art.
In order to achieve the purpose, the invention provides a control method of fresh air equipment, wherein the fresh air equipment comprises a first heat exchange system and a second heat exchange system, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, and the second heat exchange system is used for exchanging heat between the fresh air channel and an air exhaust channel;
the control method of the fresh air equipment comprises the following steps:
when the fresh air equipment is in heating operation, the first heat exchange system is controlled to run without frosting, and the second heat exchange system is controlled to run in heating operation;
when the second heat exchange system meets the defrosting condition, the second heat exchange system is controlled to enter a defrosting mode, and the first heat exchange system keeps running without frosting.
Optionally, the first heat exchange system includes a compressor and a first heat exchanger disposed in an outdoor environment, and the first heat exchange system is controlled not to frost, including:
acquiring at least one of a first coil temperature of a first heat exchanger and a saturation temperature corresponding to a first suction pressure of a compressor, and a fresh air temperature;
when the fresh air temperature is lower than or equal to a first preset temperature, comparing the first coil pipe temperature with the fresh air dew point temperature, and/or comparing the saturation temperature with the fresh air dew point temperature to obtain a first comparison result; and the number of the first and second groups,
and controlling the first heat exchange system to operate according to the first comparison result.
Optionally, the first heat exchange system further comprises a first throttling element; controlling the operation of the first heat exchange system according to the first comparison result, comprising:
when the temperature of the first coil pipe is less than or equal to the fresh air dew point temperature and/or the saturation temperature is less than or equal to the fresh air dew point temperature, the rotating speed of the first compressor is reduced and/or the opening degree of the first throttling element is increased.
Optionally, the first heat exchange system includes a compressor, a first throttling element and a first heat exchanger disposed in an outdoor environment, and the first heat exchange system is controlled to operate without frost formation, including:
acquiring at least one of a first coil temperature of a first heat exchanger and a first suction pressure of a compressor, and a fresh air temperature;
when the fresh air temperature is higher than the first preset temperature, and when the first coil pipe temperature is lower than or equal to the preset coil pipe temperature, and/or the first suction pressure is lower than or equal to the preset pressure, the rotating speed of the first compressor is reduced, and/or the opening degree of the first throttling element is increased.
Optionally, the second heat exchange system includes a second compressor and a third heat exchanger disposed in the exhaust passage, and the control method further includes:
acquiring at least one of a second coil temperature of a third heat exchanger and a second suction pressure of a second compressor;
and when the temperature of the second coil is less than or equal to a second preset temperature and/or the second suction pressure is less than or equal to a set pressure, determining that the second heat exchange system meets the defrosting condition.
Optionally, the new trend equipment is still including setting up the fan of airing exhaust in the passageway of airing exhaust, and control second heat transfer system gets into the mode of defrosting, includes:
and adjusting at least one of the operation parameters of the second heat exchange system and the operation parameters of the exhaust fan so that the temperature of the second coil is higher than a second preset temperature and/or the second suction pressure is higher than a set pressure.
Optionally, the second heat exchange system further includes a second throttling element, and at least one of an operation parameter of the second heat exchange system and an operation parameter of the exhaust fan is adjusted, including at least one of the following controls:
reducing the rotation speed of the second compressor;
turning off the second compressor;
increasing the opening of the second throttling element; and
the rotating speed of the exhaust fan is increased.
Optionally, the fresh air device further comprises a fresh air fan arranged in the fresh air channel; the control method further comprises the following steps:
acquiring the air outlet temperature of fresh air equipment; and the number of the first and second groups,
and when the air outlet temperature is lower than a third preset temperature, reducing the rotating speed of the fresh air fan, wherein the third preset temperature is the indoor required temperature.
In addition, in order to achieve the above object, the present invention further provides a control device for a fresh air device, wherein the fresh air device includes a first heat exchange system and a second heat exchange system, the first heat exchange system is used for heat exchange between the fresh air channel and an outdoor environment, and the second heat exchange system is used for heat exchange between the fresh air channel and an exhaust channel;
the control device includes:
the driving module is used for controlling the first heat exchange system to run without frosting and the second heat exchange system to run for heating when the fresh air equipment runs for heating; and the number of the first and second groups,
the driving module is further used for controlling the second heat exchange system to enter a defrosting mode when the second heat exchange system meets a defrosting condition, and the first heat exchange system keeps running without frosting.
In addition, in order to achieve the above object, the present invention further provides a fresh air device, including: the fresh air equipment control method comprises a first heat exchange system, a second heat exchange system, a storage device, a processor and a control program of fresh air equipment, wherein the control program of the fresh air equipment is stored on the storage device and can run on the processor, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, the second heat exchange system is used for exchanging heat between the fresh air channel and an exhaust channel, and the control program of the fresh air equipment is executed by the processor to realize the control method of the fresh air equipment.
Optionally, the fresh air device has a fresh air channel and an exhaust air channel, and the first heat exchange system includes a first compressor, a first four-way valve, a first heat exchanger, a first throttling element and a second heat exchanger which are connected in sequence; the second heat exchange system comprises a second compressor, a second four-way valve, a third heat exchanger, a second throttling element and a fourth heat exchanger which are connected in sequence; wherein the content of the first and second substances,
the first heat exchanger is arranged in the external environment;
a second heat exchanger, a fourth heat exchanger and a fresh air fan are sequentially arranged in the fresh air channel from the outdoor to the indoor direction;
the third heat exchanger and the exhaust fan are arranged in the exhaust channel.
In addition, in order to achieve the above object, the present invention further provides a storage medium, where a control program of a fresh air device is stored on the storage medium, and when the control program of the fresh air device is executed by a processor, the control method of the fresh air device is implemented.
In the invention, the fresh air equipment comprises a first heat exchange system and a second heat exchange system, wherein the first heat exchange system is used for exchanging heat between the fresh air channel and the outdoor environment, and the second heat exchange system is used for exchanging heat between the fresh air channel and the exhaust channel; when the fresh air equipment is in heating operation, the first heat exchange system is controlled to run without frosting, and the second heat exchange system is controlled to run in heating operation; when the second heat exchange system meets the defrosting condition, the second heat exchange system is controlled to enter a defrosting mode, and the first heat exchange system keeps running without frosting. According to the invention, by controlling the first heat exchange system to run without frosting, even if the second heat exchange system is defrosted, the running of at least one heat exchange system is ensured, so that the fresh air equipment can continue to provide fresh air, and the user experience is improved.
Drawings
Fig. 1 is a block diagram of a fresh air device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a fresh air device according to the present invention;
fig. 3 is a schematic flow chart of a defrosting control method for fresh air equipment according to a first embodiment of the present invention;
FIG. 4 is a schematic flow chart of a defrosting control method for fresh air equipment according to a second embodiment of the present invention;
FIG. 5 is a schematic flow chart of a defrosting control method for fresh air equipment according to a third embodiment of the present invention;
fig. 6 is a block diagram of a defrosting control device of a fresh air device according to a first embodiment of the present invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
1001 Processor with a memory for storing a plurality of data 20 Air exhaust channel
1002 Communication bus C1~C2 First to second compressors
1003 User interface V1~V2 First to second four-way valves
1004 Network interface H1~H4 First to fourth heat exchangers
1005 Memory device K1~K2 First to second throttling elements
1006 First heat exchange system Y1~Y3 First to third fans
1007 Second heat exchange system 100 Drive module
10 Fresh air channel
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a block diagram of a fresh air device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the fresh air device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005, a first heat exchange system 1006, and a second heat exchange system 1007.
In this embodiment, a communication bus 1002 is used to enable connection communication between these components. The user interface 1003 may include a Display screen (Display) or a standard wired, wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the fresh air device and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As shown in FIG. 1, memory 1005, identified as a computer storage medium, may include an operating system, a network communications module, a user interface module, and a control program for the air moving equipment.
In the fresh air device shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the fresh air device calls a control program of the fresh air device stored in the memory 1005 through the processor 1001, and executes the control method of the fresh air device provided by the embodiment of the invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the fresh air device of the present invention. In order to more clearly explain the control method of the fresh air equipment, the invention provides the fresh air equipment, and the control method of the fresh air equipment is executed on the basis of the fresh air equipment.
As shown in fig. 2, the fresh air device may have a first heat exchange system 1006 and a second heat exchange system 1007. The first heat exchange system 1006 may include a first compressor C1, a first four-way valve V1, a first heat exchanger H1, a first throttling element K1, and a second heat exchanger H2. Second heat exchange system 1007 can include a second compressor C2, a second four-way valve V2, a third heat exchanger H3, a second throttling element K2, and a fourth heat exchanger H4. The first throttling element K1 and the second throttling element K2 may be electronic expansion valves or capillary tubes. The first compressor C1 and the second compressor C2 are two independent compressors.
When the first heat exchange system 1006 is in a refrigeration mode, a high-temperature and high-pressure refrigerant is output from the first compressor C1, flows to the first heat exchanger H1 through the first four-way valve V1, exchanges heat with air in the external environment in the first heat exchanger H1, and is cooled after heat exchange; then the refrigerant is converted into a low-temperature and low-pressure refrigerant through the first throttling element K1, then the second heat exchanger H2 exchanges heat with the air in the fresh air channel, the temperature is raised after the heat exchange, and finally the refrigerant returns to the first compressor C1. The running direction of the refrigerant in the heating mode is opposite to that of the refrigerant, and the high-temperature and high-pressure refrigerant exchanges heat with the second heat exchanger H2 to be cooled, exchanges heat with the first heat exchanger H1 to be heated, and finally returns to the first compressor C1.
The operation mode of the second heat exchange system 1007 is similar to that of the first heat exchange system 1006, and when refrigerating, a high-temperature and high-pressure refrigerant firstly exchanges heat with the third heat exchanger H3 to reduce the temperature, then exchanges heat with the fourth heat exchanger H4 to increase the temperature, and finally returns to the second compressor C2; during heating, the high-temperature and high-pressure refrigerant exchanges heat with the fourth heat exchanger H4 to be cooled, exchanges heat with the third heat exchanger H3 to be heated, and finally returns to the second compressor C2.
In addition, the first heat exchange system and the second heat exchange system can also share one multi-cylinder compressor. Specifically, the fresh air device includes a compressor having two independent cylinders. A first cylinder in the compressor is connected to a first four-way valve V1, a first heat exchanger H1, a first throttling element K1, and a second heat exchanger H2 to form a first heat exchange system 1006. The second cylinder in the compressor is connected to a second four-way valve V2, a third heat exchanger H3, a second throttling element K2, and a fourth heat exchanger H4 to form a second heat exchange system 1007. The refrigerants in the first heat exchange system and the second heat exchange system are isolated from each other.
It should be noted that the fresh air device further has a fresh air channel 10 and an exhaust air channel 20, a second fan Y2 is disposed in the fresh air channel 10, and the second fan Y2 is used for extracting air from the external environment into the fresh air channel 10. A third fan Y3 is provided in the exhaust duct 20, and the third fan Y3 is used to draw air from the indoor environment into the exhaust duct 20.
Specifically, a second heat exchanger H2, a fourth heat exchanger H4 and a second fan Y2 are sequentially arranged in the fresh air channel 10 from the outdoor to the indoor direction, and a third heat exchanger H3 and a third fan Y3 are sequentially arranged in the exhaust air channel 20 from the outdoor to the indoor direction.
In addition, the first heat exchange system 1006 further includes a first fan Y1, and the first fan Y1 is disposed corresponding to the first heat exchanger H1. The first fan Y1 is configured to circulate air in the external environment on a surface of the first heat exchanger H1, so that the refrigerant in the first heat exchanger H1 exchanges heat with the air in the external environment.
The working principle of the fresh air device is as follows: the second fan Y2 extracts fresh air from the external environment, the fresh air sequentially passes through the second heat exchanger H2 and the fourth heat exchanger H4 to exchange heat for two times, and then the fresh air is conveyed to the indoor environment. The third fan Y3 extracts exhaust air from the indoor environment, and the exhaust air is subjected to primary heat exchange by the third heat exchanger H3 and then is conveyed to the outdoor. The fresh air equipment can have a refrigerating mode and a heating mode, wherein the refrigerating mode refers to that fresh air is cooled and/or dehumidified through the second heat exchanger H2 and the fourth heat exchanger H4 and then is conveyed indoors; the heating mode is that the fresh air is heated by the second heat exchanger H2 and the fourth heat exchanger H4 and then is conveyed to the indoor.
It should be noted that the fresh air device may also include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used. For example, a humidifying device may be further disposed in the fresh air channel 10 to adjust the humidity of the fresh air; wherein, humidification device can set up in the air-out end of new trend passageway 10.
In another embodiment, a plurality of heat exchangers may be disposed in the fresh air channel 10 in each of the first heat exchange system 1006 and the second heat exchange system 1007; the heat exchangers in each heat exchanger system are arranged in sequence in a cross way.
Specifically, the first heat exchange system 1006 may further include a third throttling element and a fifth heat exchanger. One end of the fifth heat exchanger may be connected to the first compressor C1, and the other end of the fifth heat exchanger may be connected to one end of the second heat exchanger H2 through a third throttling element.
The second heat exchange system 1007 may also include a fourth throttling element and a sixth heat exchanger. One end of the sixth heat exchanger may be connected to the second compressor C2, and the other end of the sixth heat exchanger is connected to one end of the fourth heat exchanger H4 through a fourth throttling element.
The fresh air channel 10 is provided with a second heat exchanger H2, a fourth heat exchanger H4, a fifth heat exchanger, a sixth heat exchanger and a second fan Y2 in sequence from outdoor to indoor. From this, the new trend in the new trend passageway can carry out the heat transfer via 4 heat exchangers. Of course, the number of the heat exchangers in each heat exchange system can be set according to requirements, and the number is not limited in the embodiment.
Based on the hardware structure, the embodiment of the control method of the fresh air equipment is provided.
Referring to fig. 3, fig. 3 is a schematic flow chart of a control method of a fresh air device according to a first embodiment of the present invention. The invention provides a first embodiment of a control method of fresh air equipment.
In a first embodiment, the control method of the fresh air device may be applied to the fresh air device as described above, and the control method of the fresh air device may include the following steps:
step S10: when the fresh air equipment is used for heating, the first heat exchange system is controlled to run without frosting, and the second heat exchange system is controlled to run for heating.
It should be understood that the main execution body of the present embodiment is the above fresh air device, and the fresh air device has functions of data processing, data communication, program operation, and the like. Generally, the operation of each component in the fresh air device may be driven by a core controller, so the execution main body of this embodiment may also be the core controller in the fresh air device, and the core controller may be the processor.
It can be understood that when the fresh air device enters the heating mode, the first heat exchange system absorbs heat from the external environment through the first heat exchanger, and then heats the fresh air in the fresh air channel through the second heat exchanger, so that the temperature of the first heat exchanger is low, and frosting is easy to occur; the second heat exchange system absorbs heat from the air exhaust channel through the third heat exchanger, and then heats fresh air in the fresh air channel through the fourth heat exchanger, and the third heat exchanger is low in temperature and easy to frost.
During concrete implementation, the fresh air equipment is also provided with detection equipment to detect the state of each heat exchanger. The core controller is connected with the detection equipment, judges the frosting states of the first heat exchange system and the second heat exchange system according to the detection signals fed back by the detection equipment, and performs corresponding control. For example, the detection device may feed back the temperature of the third heat exchanger to the core controller in real time or intermittently, and the core controller determines whether the third heat exchanger has frosted based on the temperature.
It should be noted that, in order to improve the energy efficiency of the fresh air device, the power of the second heat exchange system is often greater than the power of the first heat exchange system. This is because the second heat exchange system is capable of heat recovery, which has a high energy efficiency. Taking the operating environment as a winter example, if the external environment temperature is 0 ℃, the fresh air equipment enters a heating mode, and the temperature of the exhaust channel is usually higher than the external environment temperature, such as 15 ℃. At the moment, the first heat exchange system absorbs heat more difficultly, and the second heat exchange system absorbs heat more easily, so that the second heat exchange system can be fully utilized to exchange heat through reducing the power of the first heat exchange system, and the energy efficiency of the fresh air equipment is improved.
It will be appreciated that because the first heat exchange system is less powerful than the second heat exchange system, the rate of frost formation tends to be slower than the second heat exchange system. Thus, when the second heat exchange system enters the defrost mode, the first heat exchange system typically has not yet begun to frost, or is frosting.
In this embodiment, because the second heat transfer system often frosts earlier, in order to guarantee that new trend equipment keeps supplying air, need avoid the second heat transfer system to get into the back of defrosting, first heat transfer system also need to defrost, so with first heat transfer system with the operation of not frosting. The frostless operation means that the first heat exchanger in the first heat exchange system is kept at a high temperature, and frosting of the heat exchanger is avoided.
Step S20: when the second heat exchange system meets the defrosting condition, the second heat exchange system is controlled to enter a defrosting mode, and the first heat exchange system keeps running without frosting.
In this embodiment, in order to avoid frosting that the fresh air equipment can not provide fresh air after entering defrosting, at least one heat exchange system needs to be ensured to be in a heating mode. Therefore, after the second heat exchange system enters the defrosting mode, the operation of the first heat exchange system needs to be maintained.
It can be understood that, because first heat exchange system keeps the operation of not frosting, then get into the back of defrosting at second heat exchange system, first heat exchange system can still normally operate, has guaranteed from this that new trend equipment also can continuously send the new trend after getting into the defrosting.
In addition, in order to make up for the temperature drop caused by the fact that the second heat exchange system enters the defrosting mode, the rotating speed of a fresh air fan at the inlet of the fresh air channel can be reduced, and therefore the air outlet temperature of the fresh air equipment is improved. In the concrete implementation, the air outlet temperature of the fresh air equipment can be obtained; and when the air outlet temperature is lower than a third preset temperature, the rotating speed of the fresh air fan is reduced, and the third preset temperature is the indoor required temperature.
Referring to fig. 2, the fresh air blower is a second blower disposed at an inlet of the fresh air passage. After the rotating speed of the fresh air fan is reduced, because the air volume in the fresh air channel is reduced, the air outlet temperature of the fresh air equipment is correspondingly improved under the condition that the heat exchange capacity of the first heat exchange system is not changed, and therefore the comfort of a user is improved. The indoor required temperature can be a temperature set by a user; or the body feeling comfortable temperature determined by the core controller according to the current season and time.
As an example, the fresh air device in this embodiment may operate according to the following parameters: the fresh air temperature is assumed to be-5 ℃, the fresh air dew point temperature is-8 ℃, and the exhaust air temperature is 20 ℃. The evaporation temperature of the evaporator is controlled to be-7 ℃ by adjusting the rotating speed of the compressor or the opening degree of the expansion valve of the first heat exchange system, so that the evaporator of the first heat exchange system is ensured not to frost. And simultaneously, the rotating speed of a compressor or the opening degree of an expansion valve of the second heat exchange system is adjusted to enable the temperature of the indoor environment to reach a preset value. When the second heat exchange system enters a defrosting mode, the first heat exchange system keeps heating the fresh air, if the air outlet temperature is less than 20 ℃, the rotating speed of the fresh air fan is reduced, and if the air outlet temperature is greater than 20 ℃, the rotating speed of the fresh air fan is increased. And after the second heat exchange system finishes defrosting, entering a heating mode and recovering the operating parameters before defrosting.
In a first embodiment, the fresh air device has a two-stage heat exchange system, wherein the first heat exchange system is used for realizing heat exchange between the fresh air channel and the external environment; the second heat exchange system is used for realizing heat exchange between the fresh air channel and the exhaust channel; through controlling the first heat exchange system not to frost, even the second heat exchange system gets into the defrosting, guaranteed at least one heat exchange system's operation, make new trend equipment can continue to provide the new trend, improved user's experience.
Referring to fig. 4, fig. 4 is a schematic flow chart of a defrosting control method for a fresh air device according to a second embodiment of the present invention. Based on the first embodiment, the invention provides a second embodiment of a defrosting control method for fresh air equipment.
In the second embodiment, to ensure that the first heat exchange system operates without frost formation, the control method of the first heat exchange system may include the following steps:
step S30: and acquiring at least one of the first coil temperature of the first heat exchanger and the saturation temperature corresponding to the first suction pressure of the compressor, and the fresh air temperature.
It should be noted that the fresh air temperature refers to the temperature of air taken by the fresh air device from the external environment. The first coil temperature is the coil temperature of an evaporator in the first heat exchange system. When the first heat exchange system enters a heating mode, the evaporator in the first heat exchange system is a heat exchanger located in the external environment; such as the first heat exchanger shown in fig. 2.
In a specific implementation, a temperature sensor can be arranged on the first heat exchanger so as to detect the temperature of the coil of the first heat exchanger. The temperature sensor can feed back a temperature signal of the first heat exchanger to the core controller in real time or discontinuously, and the core controller receives and analyzes the temperature signal to obtain the temperature of the first coil pipe. The core controller can acquire a first suction pressure of the compressor through the pressure sensor and then determine a saturation temperature corresponding to the first suction pressure according to a preset mapping relation.
Similarly, the inlet of the fresh air channel and the indoor environment can also be provided with temperature sensors, and the core controller determines the temperature of the fresh air according to temperature signals fed back by the temperature sensors. In addition, the core controller can also be communicated with a meteorological database to acquire meteorological data such as the temperature of the region where the core controller is located from the meteorological database, so that the fresh air temperature can be acquired. Of course, the fresh air temperature and the first coil temperature may be obtained in other manners, which is not limited in this embodiment.
Step S40: when the fresh air temperature is less than or equal to the first preset temperature, the first coil pipe temperature and the fresh air dew point temperature are compared, and/or the saturation temperature and the fresh air dew point temperature are compared to obtain a first comparison result.
It can be understood that the fresh air dew point temperature refers to the dew point temperature corresponding to the current fresh air. The first coil pipe temperature and the fresh air dew point temperature are judged, so that whether the first heat exchanger is likely to frost or not is determined. (ii) a Or, whether the first heat exchanger is likely to frost or not is determined by judging the magnitude relation between the saturation temperature and the fresh air dew point temperature. Wherein, new trend dew point temperature can acquire through the humiture sensor that sets up in new trend passageway entrance and the indoor environment, perhaps acquires through meteorological data.
It should be noted that, because the relative humidity of air is different at different temperatures, the frosting speed is also different. Generally, when the outdoor temperature is low, the humidity is low, and the frosting speed is slow; when the outdoor temperature is higher, the humidity is high, and the frosting speed is high. In the embodiment, the temperature of the external environment is distinguished by setting the first preset temperature, when the fresh air temperature is less than or equal to the first preset temperature, the external environment is considered to be in a lower temperature environment, the frosting speed is low, and when the temperature is low outdoors, the frosting is easy to occur once dew is condensed; when new trend temperature is greater than first preset temperature, think that the external environment is in higher temperature environment, the frosting is fast, and when outdoor high temperature, even the condensation, also need the coil pipe to satisfy the temperature and be less than the threshold value just can frosting. The value range of the first preset temperature can be-30 to 15 ℃, and the specific value can be set according to requirements, which is not limited in the embodiment.
Step S50: and controlling the first heat exchange system to operate according to the first comparison result.
It is understood that when the first coil temperature is less than or equal to the fresh air dew point temperature, and/or the saturation temperature is less than or equal to the fresh air dew point temperature, it can be determined that the first heat exchanger is at a high risk of frosting and may start frosting. On the contrary, if the temperature of the first coil pipe is higher than the dew point temperature of the fresh air and/or the saturation temperature is higher than the dew point temperature of the fresh air, it can be judged that the first heat exchanger does not start frosting.
In this embodiment, in order to determine whether the evaporator starts frosting under the condition of a faster frosting speed, the first coil temperature may be compared with the preset coil temperature when the fresh air temperature is higher than the first preset temperature, and/or the first suction pressure is compared with the preset pressure to obtain a second comparison result. The preset coil temperature is the temperature when the first heat exchanger begins to frost.
It can be understood that, after the heat exchanger frosts, the coil temperature of the heat exchanger is often lower, so that whether the frosting is started when the heat exchanger is at the first coil temperature can be judged according to the frosting starting temperature of the heat exchanger. If the first coil temperature is less than or equal to the preset coil temperature, it can be determined that the first heat exchanger is at a high risk of frosting and may start frosting. The preset coil temperature range is-3~3 ℃. Because the temperature when the heat exchanger begins to frost receives the influence of outside temperature, consequently can set up the corresponding coil pipe temperature of predetermineeing according to the outdoor temperature of difference. For example, the preset coil temperature may be-1 ℃ when the external temperature is less than 0 ℃; the preset coil temperature may be 0 ℃ when the external temperature is greater than or equal to 0 ℃ and less than or equal to 5 ℃. When the external temperature is greater than 5 ℃, the preset coil temperature may be 1 ℃. Currently, it may be specifically set according to requirements, and this embodiment is not limited to this.
The preset pressure is the suction pressure when the evaporator starts to frost, and if the suction pressure is less than or equal to the preset pressure; judging that the evaporator begins to frost, and if the suction pressure is greater than the preset pressure; it is determined that the evaporator does not start frosting. The value range of the preset pressure can be 0.35 to 0.8mpa, the corresponding preset pressure can be determined according to the outdoor temperature, and the higher the outdoor temperature is, the higher the preset pressure is. The specific value thereof may be set as needed, which is not limited in this embodiment.
In a specific implementation, if it is determined that the first heat exchanger starts to frost, the operation parameters of the first heat exchange system need to be adjusted to avoid the first heat exchanger from frosting. For example, the rotational speed of the first compressor may be reduced, and/or the opening degree of the first throttling element may be increased. The temperature of the refrigerant in the first heat exchanger is improved by reducing the heat exchange capacity of the first heat exchange system, so that the first heat exchanger is prevented from frosting.
In a second embodiment, when the external environment is at a low temperature and a high temperature, the temperature of a coil of a first heat exchanger which is located outdoors in a first heat exchange system is detected and judged; or checking and judging the suction pressure of the compressor in the first heat exchange system; thereby determining whether the evaporator begins to frost; the frosting state detection accuracy of the first heat exchange system is improved, continuous operation of the first heat exchange system is guaranteed, the fresh air equipment continuously conveys fresh air to the indoor space, and user experience is improved.
Referring to fig. 5, fig. 5 is a schematic flow chart of a defrosting control method for fresh air equipment according to a third embodiment of the present invention. Based on the first embodiment and the second embodiment, the invention provides a third embodiment of a defrosting control method for fresh air equipment.
In a third embodiment, in order to control the second heat exchange system more accurately, the heating control and defrosting control method of the second heat exchange system may include the following steps:
step S60: at least one of a second coil temperature of the third heat exchanger and a second suction pressure of the second compressor is obtained.
It can be understood that in order to improve the energy efficiency of the fresh air device, the second heat exchange system needs to be driven to operate at a higher power as much as possible. With the operation of the second heat exchange system, frosting may occur in the third heat exchanger in the second heat exchange system. When the frost layer of the third heat exchanger reaches a certain thickness, whether the second heat exchange system meets the defrosting condition or not can be judged.
In specific implementation, the frosting state of the second heat exchange system can be determined by detecting and judging the temperature of the coil of the third heat exchanger and/or the suction pressure of the compressor. The second embodiment can be referred to for obtaining the temperature of the second coil and the suction pressure of the compressor, and this embodiment is not described herein again.
Step S70: and when the temperature of the second coil is less than or equal to a second preset temperature and/or the second suction pressure is less than or equal to a set pressure, determining that the second heat exchange system meets the defrosting condition. It should be noted that the second preset temperature is a temperature of the third heat exchanger in a frosting state. When the temperature of the second coil is less than or equal to a second preset temperature, the defrosting condition can be judged to be met; and when the temperature of the second coil pipe is greater than a second preset temperature, judging that the defrosting condition is not met. The value range of the second preset temperature can be-8~3 ℃, different third preset temperatures can be determined according to different indoor temperatures, and the higher the indoor temperature is, the higher the third preset temperature is.
Or the preset pressure is the suction pressure of the compressor after the third heat exchanger frosts, and if the suction pressure is less than or equal to the set pressure; judging that the defrosting condition is met, and if the suction pressure is greater than the set pressure; it is determined that the defrosting condition is not satisfied. The value range of the set pressure can be 0.2 to 0.8mpa, and the corresponding preset pressure can be determined according to the indoor temperature, and the higher the indoor temperature is, the higher the preset pressure is.
After the second heat exchange system is judged to meet the defrosting condition, the second heat exchange system needs to be controlled to enter a defrosting mode, so that the heat exchange capacity of the second heat exchange system is recovered. In the defrosting process, the temperature of the second coil and the second suction pressure gradually rise, and when the temperature of the second coil is higher than a second preset temperature and/or the second suction pressure is higher than a set pressure, the defrosting of the second heat exchange system is judged to be finished; and the conversion of the compressor and the opening of the throttling element are restored to the parameters before defrosting.
Certainly, in order to ensure that the second heat exchange system is defrosted more thoroughly, higher defrosting exit conditions can be set. Namely, when the temperature of the second coil reaches a fourth preset temperature, the defrosting is judged to be finished, and the value range of the fourth preset temperature can be 0-20 ℃. And similarly, when the second heat exchange system is removed from defrosting, the suction pressure of the compressor is greater than the set pressure.
In the present embodiment, in order to improve defrosting efficiency, the evaporator in the second heat exchange system may be defrosted by using hot air in the exhaust passage. Because the air in the air exhaust channel comes from the indoor, the air exhaust temperature is often higher, and when the exhaust air flows through the evaporator, the defrosting effect can be achieved. Meanwhile, the temperature of the refrigerant in the evaporator is increased and the defrosting process is accelerated by reducing the rotating speed of the second compressor and/or increasing the opening degree of the second throttling element.
In addition, in order to reduce the energy consumption of the fresh air equipment, when the second heat exchange system carries out defrosting, a compressor in the second heat exchange system can be directly closed; meanwhile, the defrosting speed is increased, and the rotating speed of the air exhaust fan can be increased.
In a third embodiment, whether the defrosting condition is met is judged by detecting the temperature and/or the suction pressure of the second coil of the second heat exchange system in real time. When the defrosting condition is met, the heat exchange capacity of the second heat exchange system is reduced, the air exhaust is used for defrosting, the defrosting efficiency is improved, and the energy consumption of the second heat exchange system is also reduced.
In addition, an embodiment of the present invention further provides a storage medium, where a control program of a fresh air device is stored on the storage medium, and the control program of the fresh air device, when executed by a processor, implements the steps of the control method of the fresh air device described above. Since the storage medium may adopt the technical solutions of all the embodiments, at least the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not described in detail herein.
In addition, referring to fig. 6, fig. 6 is a block diagram of a control device of a fresh air device according to an embodiment of the present invention.
In this embodiment, the controlling means of new trend equipment is used for controlling new trend equipment, and the concrete structure of this new trend equipment can refer to the aforesaid, and the controlling means of new trend equipment includes:
and the driving module 100 is used for controlling the first heat exchange system to run without frosting and the second heat exchange system to run for heating when the fresh air equipment runs for heating.
It can be understood that when the fresh air device enters the heating mode, the first heat exchange system absorbs heat from the external environment through the first heat exchanger, and then heats the fresh air in the fresh air channel through the second heat exchanger, so that the temperature of the first heat exchanger is low, and frosting is easy to occur; the second heat exchange system absorbs heat from the air exhaust channel through the third heat exchanger, and then heats fresh air in the fresh air channel through the fourth heat exchanger, and the third heat exchanger is low in temperature and easy to frost.
During concrete realization, still be provided with check out test set among the new trend equipment to detect the state of each heat exchanger. The driving module 100 is connected to the detection device, and determines the frosting states of the first heat exchange system and the second heat exchange system according to the detection signal fed back by the detection device, and performs corresponding control. For example, the detection device may feed back the temperature of the third heat exchanger to the driving module 100 in real time or intermittently, and the driving module 100 determines whether the third heat exchanger has frosted according to the temperature.
It should be noted that, in order to improve the energy efficiency of the fresh air device, the power of the second heat exchange system is often greater than the power of the first heat exchange system. This is because the second heat exchange system is capable of heat recovery, which has a high energy efficiency. Taking the operating environment as winter as an example, if the external environment temperature is 0 ℃, the fresh air equipment enters a heating mode, and the temperature of the exhaust channel is usually higher than the external environment temperature, such as 15 ℃. At the moment, the first heat exchange system absorbs heat more difficultly, and the second heat exchange system absorbs heat more easily, so that heat exchange can be carried out by fully utilizing the second heat exchange system, and the energy efficiency of the fresh air equipment is improved.
It will be appreciated that because of the lower power of the first heat exchange system, the rate of frost formation tends to be slower than that of the second heat exchange system. Thus, when the second heat exchange system enters the defrost mode, the first heat exchange system typically has not yet begun to frost, or is frosting.
In this embodiment, because the second heat transfer system often frosts earlier, in order to guarantee that new trend equipment keeps supplying air, need avoid the second heat transfer system to get into the back of defrosting, first heat transfer system also need to defrost, so with first heat transfer system with the operation of not frosting. The frostless operation means that the first heat exchanger in the first heat exchange system is kept at a high temperature, and frosting of the heat exchanger is avoided.
The driving module 100 is further configured to control the second heat exchange system to enter a defrosting mode when the second heat exchange system meets a defrosting condition, and the first heat exchange system keeps running without frosting.
In this embodiment, in order to avoid frosting that the fresh air equipment can not provide fresh air after entering defrosting, at least one heat exchange system needs to be ensured to be in a heating mode. Therefore, after the second heat exchange system enters the defrosting mode, the operation of the first heat exchange system needs to be maintained.
It can be understood that because first heat transfer system keeps the operation of not frosting, then get into the back of defrosting at the second heat transfer system, first heat transfer system can still can normal operating, has guaranteed from this that fresh air equipment also can continuously send the new trend after getting into the defrosting.
In addition, in order to make up for the temperature drop caused by the fact that the second heat exchange system enters the defrosting mode, the rotating speed of a fresh air fan at the inlet of the fresh air channel can be reduced, and therefore the air outlet temperature of the fresh air equipment is improved. In the concrete implementation, the air outlet temperature of the fresh air equipment can be obtained; and when the air outlet temperature is lower than a third preset temperature, the rotating speed of the fresh air fan is reduced, and the third preset temperature is the indoor required temperature.
Referring to fig. 2, the fresh air blower is a second blower disposed at an inlet of the fresh air passage. After the rotating speed of the fresh air fan is reduced, because the air volume in the fresh air channel is reduced, the air outlet temperature of the fresh air equipment is correspondingly improved under the condition that the heat exchange capacity of the first heat exchange system is not changed, and therefore the comfort of a user is improved. The indoor required temperature can be a temperature set by a user; or the body feeling comfortable temperature determined by the core controller according to the current season and time.
As an example, the fresh air device in this embodiment may operate according to the following parameters: the fresh air temperature is assumed to be-5 ℃, the fresh air dew point temperature is-8 ℃, and the exhaust air temperature is 20 ℃. The evaporation temperature of the evaporator is controlled to be-7 ℃ by adjusting the rotating speed of the compressor or the opening degree of the expansion valve of the first heat exchange system, so that the evaporator of the first heat exchange system is ensured not to frost. And meanwhile, the rotating speed of a compressor or the opening degree of an expansion valve of the second heat exchange system is adjusted to enable the temperature of the indoor environment to reach a preset value. When the second heat exchange system enters a defrosting mode, the first heat exchange system keeps heating the fresh air, if the air outlet temperature is less than 20 ℃, the rotating speed of the fresh air fan is reduced, and if the air outlet temperature is greater than 20 ℃, the rotating speed of the fresh air fan is increased. And after the second heat exchange system finishes defrosting, entering a heating mode and recovering the operating parameters before defrosting.
In this embodiment, the fresh air device has two stages of heat exchange systems, wherein the first heat exchange system is used for realizing heat exchange between the fresh air channel and the external environment; the second heat exchange system is used for realizing heat exchange between the fresh air channel and the exhaust channel; the driving template 100 is operated by controlling the first heat exchange system to be free from frosting, even if the second heat exchange system enters into defrosting, the operation of at least one heat exchange system is ensured, the fresh air equipment can continue to provide fresh air, and the user experience is improved.
In an embodiment, the driving module 100 is further configured to obtain at least one of a first coil temperature of the first heat exchanger and a saturation temperature corresponding to a first suction pressure of the compressor, and a fresh air temperature; when the fresh air temperature is lower than or equal to a first preset temperature, comparing the first coil pipe temperature with the fresh air dew point temperature, and/or comparing the saturation temperature with the fresh air dew point temperature to obtain a first comparison result; and controlling the first heat exchange system to operate according to the first comparison result.
In an embodiment, the driving module 100 is further configured to decrease the rotation speed of the first compressor and/or increase the opening degree of the first throttling element when the first coil temperature is less than or equal to the fresh air dew point temperature, and/or the saturation temperature is less than or equal to the fresh air dew point temperature.
In an embodiment, the driving module 100 is further configured to obtain at least one of a first coil temperature of the first heat exchanger and a first suction pressure of the compressor, and a fresh air temperature; when the fresh air temperature is higher than a first preset temperature, and when the first coil pipe temperature is lower than or equal to the preset coil pipe temperature, and/or the first suction pressure is lower than or equal to the preset pressure, the rotating speed of the first compressor is reduced and/or the opening degree of the first throttling element is increased.
In an embodiment, the driving module 200 is further configured to obtain at least one of a second coil temperature of the third heat exchanger and a second suction pressure of the second compressor; and when the temperature of the second coil is less than or equal to a second preset temperature and/or the second suction pressure is less than or equal to a set pressure, determining that the second heat exchange system meets the defrosting condition.
In an embodiment, the driving module 100 is further configured to adjust at least one of an operation parameter of the second heat exchanging system and an operation parameter of the exhaust fan, so that the temperature of the second coil is greater than a second preset temperature, and/or the second suction pressure is greater than the set pressure.
In an embodiment, the driving module 100 is further configured to perform at least one of the following controls: reducing the rotation speed of the second compressor; turning off the second compressor; increasing the opening of the second throttling element; and, increasing the rotational speed of the exhaust fan
Other embodiments or specific implementation manners of the fresh air equipment defrosting control device of the invention can refer to the above method embodiments, so that the fresh air equipment defrosting control device at least has all the beneficial effects brought by the technical scheme of the embodiments, and further description is omitted here.
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 a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, or an optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims (12)

1. A control method of fresh air equipment is characterized in that the fresh air equipment comprises a first heat exchange system and a second heat exchange system, the first heat exchange system comprises a first compressor, a first four-way valve, a first heat exchanger, a first throttling element and a second heat exchanger, the second heat exchange system comprises a second compressor, a second four-way valve, a third heat exchanger, a second throttling element and a fourth heat exchanger, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, and the second heat exchange system is used for exchanging heat between the fresh air channel and an exhaust channel;
the control method comprises the following steps:
when the fresh air equipment is in heating operation, the first heat exchange system is controlled to run without frosting, the second heat exchange system is controlled to run in heating operation, and the running without frosting means that the first heat exchanger in the first heat exchange system has higher temperature, so that the frosting of the heat exchanger is avoided;
when the second heat exchange system meets the defrosting condition, the second heat exchange system is controlled to enter a defrosting mode, the first heat exchange system keeps running without frosting, and the first heat exchange system can still run normally after the second heat exchange system enters defrosting because the first heat exchange system keeps running without frosting.
2. The method of claim 1, wherein the first heat exchange system includes a compressor and a first heat exchanger disposed in an outdoor environment, and wherein controlling the first heat exchange system to operate without frost comprises:
acquiring at least one of a first coil temperature of the first heat exchanger and a saturation temperature corresponding to a first suction pressure of the compressor, and a fresh air temperature;
when the fresh air temperature is lower than or equal to a first preset temperature, comparing the first coil pipe temperature with the fresh air dew point temperature, and/or comparing the saturation temperature with the fresh air dew point temperature to obtain a first comparison result; and the number of the first and second groups,
and controlling the first heat exchange system to operate according to the first comparison result.
3. The control method of claim 2, wherein the first heat exchange system further comprises a first throttling element; the controlling the first heat exchange system to operate according to the first comparison result comprises the following steps:
when the temperature of the first coil pipe is less than or equal to the fresh air dew point temperature and/or the saturation temperature is less than or equal to the fresh air dew point temperature, the rotating speed of the first compressor is reduced and/or the opening degree of the first throttling element is increased.
4. The control method of claim 2 wherein the first heat exchange system comprises a compressor, a first throttling element, and a first heat exchanger disposed in an outdoor environment, and wherein the controlling the first heat exchange system to operate without frost comprises:
acquiring at least one of a first coil temperature of the first heat exchanger and a first suction pressure of the compressor, and a fresh air temperature;
when the fresh air temperature is higher than a first preset temperature, and when the first coil pipe temperature is lower than or equal to a preset coil pipe temperature, and/or when the first suction pressure is lower than or equal to a preset pressure, reducing the rotating speed of the first compressor and/or increasing the opening of the first throttling element.
5. The control method according to any one of claims 1 to 4, wherein the second heat exchange system includes a second compressor and a third heat exchanger provided in the exhaust passage, the control method further comprising:
obtaining at least one of a second coil temperature of the third heat exchanger and a second suction pressure of the second compressor;
and when the temperature of the second coil is less than or equal to a second preset temperature and/or the second suction pressure is less than or equal to a set pressure, determining that the second heat exchange system meets the defrosting condition.
6. The control method of claim 5, wherein the fresh air device further comprises an exhaust fan disposed in the exhaust channel, and the controlling the second heat exchange system to enter the defrosting mode comprises:
and adjusting at least one of the operation parameters of the second heat exchange system and the operation parameters of the exhaust fan so that the temperature of the second coil is higher than a second preset temperature, and/or the second suction pressure is higher than a set pressure.
7. The control method of claim 6, wherein the second heat exchange system further comprises a second throttling element, and the adjusting at least one of the operating parameters of the second heat exchange system and the operating parameters of the exhaust fan comprises at least one of:
reducing the rotational speed of the second compressor;
turning off the second compressor;
increasing the opening of the second throttling element; and
and increasing the rotating speed of the exhaust fan.
8. The control method of any one of claims 1-4, wherein the fresh air device further comprises a fresh air blower disposed within the fresh air channel, the control method further comprising:
acquiring the air outlet temperature of the fresh air equipment; and the number of the first and second groups,
when the air outlet temperature is lower than a third preset temperature, the rotating speed of the fresh air fan is reduced, and the third preset temperature is an indoor required temperature.
9. The control device of the fresh air equipment is characterized in that the fresh air equipment comprises a first heat exchange system and a second heat exchange system, the first heat exchange system comprises a first compressor, a first four-way valve, a first heat exchanger, a first throttling element and a second heat exchanger, the second heat exchange system comprises a second compressor, a second four-way valve, a third heat exchanger, a second throttling element and a fourth heat exchanger, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, and the second heat exchange system is used for exchanging heat between the fresh air channel and an exhaust channel;
the control device includes:
the driving module is used for controlling the first heat exchange system to run without frosting and the second heat exchange system to run for heating when the fresh air equipment runs for heating, wherein the running without frosting means that a first heat exchanger in the first heat exchange system has higher temperature, and the heat exchanger is prevented from starting frosting; and the number of the first and second groups,
the driving module is further used for controlling the second heat exchange system to enter a defrosting mode when the second heat exchange system meets a defrosting condition, the first heat exchange system keeps running without frosting, and the first heat exchange system can still run normally after the second heat exchange system enters defrosting due to the fact that the first heat exchange system keeps running without frosting.
10. The utility model provides a new trend equipment, its characterized in that, new trend equipment includes: the control method of the fresh air equipment comprises a first heat exchange system, a second heat exchange system, a storage device, a processor and a control program of the fresh air equipment, wherein the control program of the fresh air equipment is stored on the storage device and can run on the processor, the first heat exchange system is used for exchanging heat between a fresh air channel and an outdoor environment, the second heat exchange system is used for exchanging heat between the fresh air channel and an exhaust air channel, and when the control program of the fresh air equipment is executed by the processor, the control method of the fresh air equipment according to any one of claims 1 to 8 is achieved.
11. The fresh air device as claimed in claim 10, wherein the fresh air device has a fresh air channel and an exhaust air channel, and the first heat exchange system comprises a first compressor, a first four-way valve, a first heat exchanger, a first throttling element and a second heat exchanger which are connected in sequence; the second heat exchange system comprises a second compressor, a second four-way valve, a third heat exchanger, a second throttling element and a fourth heat exchanger which are connected in sequence; wherein the content of the first and second substances,
the first heat exchanger is arranged in the external environment;
the second heat exchanger, the fourth heat exchanger and the fresh air fan are sequentially arranged in the fresh air channel from the outdoor direction to the indoor direction; and the number of the first and second groups,
and the third heat exchanger and the exhaust fan are arranged in the exhaust channel.
12. A storage medium, wherein a control program of a fresh air device is stored on the storage medium, and when being executed by a processor, the control program of the fresh air device implements the control method of the fresh air device according to any one of claims 1 to 8.
CN202111410276.3A 2021-11-24 2021-11-24 Control method, device and equipment of fresh air equipment and storage medium Active CN114001437B (en)

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US4157649A (en) * 1978-03-24 1979-06-12 Carrier Corporation Multiple compressor heat pump with coordinated defrost
CN102022872B (en) * 2010-12-03 2011-12-07 劳特斯空调(江苏)有限公司 Defrosting control method for intelligent air cooling heat pump
CN103216981B (en) * 2013-04-28 2015-04-08 宁波沃弗圣龙环境技术有限公司 Frostless air handling unit and proportion-integration-differential control method thereof
CN104154609B (en) * 2014-08-04 2017-01-18 北京振兴华龙制冷设备有限责任公司 Dual-system heat pump roof unit
CN106546028B (en) * 2016-09-29 2019-12-27 同济大学 Frostless type refrigerant dual cycle fresh air conditioning unit
CN106476565B (en) * 2016-10-25 2019-03-26 珠海格力电器股份有限公司 Heat pump air conditioning unit, control method thereof and electric motor coach
CN112432320B (en) * 2020-04-30 2023-06-30 杭州三花研究院有限公司 Control method for preventing frosting of air conditioning system, controller of control method and air conditioning system

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