CN114087740B - Fresh air equipment, control method thereof and computer-readable storage medium - Google Patents

Fresh air equipment, control method thereof and computer-readable storage medium Download PDF

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Publication number
CN114087740B
CN114087740B CN202111409150.4A CN202111409150A CN114087740B CN 114087740 B CN114087740 B CN 114087740B CN 202111409150 A CN202111409150 A CN 202111409150A CN 114087740 B CN114087740 B CN 114087740B
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Prior art keywords
fresh air
heat
heat exchanging
air
heat exchange
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CN114087740A (en
Inventor
黄剑云
杜顺开
徐振坤
李金波
高卓贤
刘步东
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24F11/62—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
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • 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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • 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
    • F24F7/007—Ventilation with forced flow
    • 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

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

Abstract

The invention discloses a fresh air device, a control method thereof and a computer readable storage medium, wherein the control method of the fresh air device comprises the steps of obtaining the air inlet temperature of a fresh air duct; when the inlet air temperature is smaller than the first temperature threshold value, the heat pipe circulating system is controlled to operate, the fifth heat exchanging part is used for cooling and dehumidifying the fresh air in the fresh air duct, the fourth heat exchanging part is used for reheating the fresh air, the heat exchanging system is controlled to operate in a dehumidification reheating mode, the third heat exchanging part is used for dehumidifying the fresh air in the fresh air duct, the second heat exchanging part is used for reheating the dehumidified fresh air, and the first heat exchanging part is used for recovering cold energy of the exhausted air in the exhaust air duct. According to the invention, the operation of the heat pipe circulation system and the heat exchange system is controlled simultaneously, so that the fifth heat exchange part recovers the heat of fresh air in the fresh air duct, and the first heat exchange part recovers the cold energy of exhausted air in the exhaust air duct, so that the fresh air equipment can operate in an energy-saving manner.

Description

Fresh air equipment, control method thereof and computer-readable storage medium
Technical Field
The invention relates to the technical field of fresh air equipment, in particular to fresh air equipment, a control method of the fresh air equipment and a computer readable storage medium.
Background
Fresh air equipment is increasingly applied to industrial and civil buildings, and because fresh air load is large, energy consumption of a fresh air unit is large, and therefore energy conservation of the fresh air unit is paid attention.
At present, fresh air equipment mainly uses a heat exchange system to dehumidify and reheat fresh air, but the energy-saving performance of the fresh air during dehumidification and reheat is still lower.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a fresh air device, a control method thereof and a computer readable storage medium, and aims to solve the technical problem of low energy-saving performance of the fresh air device.
In order to achieve the above object, the present invention provides a control method for a fresh air device, the fresh air device includes a fresh air duct, an exhaust air duct, a heat exchange system and a heat pipe circulation system, the heat exchange system includes a first heat exchange portion, a second heat exchange portion and a third heat exchange portion, the third heat exchange portion and the second heat exchange portion are sequentially disposed in the fresh air duct along a fresh air flowing direction; the air in the exhaust air duct exchanges heat with the first heat exchange part, the air in the fresh air duct exchanges heat with the second heat exchange part and the third heat exchange part, the heat pipe circulating system comprises a fourth heat exchange part and a fifth heat exchange part, the fourth heat exchange part is arranged between the second heat exchange part and the third heat exchange part, and the fifth heat exchange part is arranged between the third heat exchange part and an air inlet of the fresh air duct; the control method of the fresh air equipment comprises the following steps:
acquiring the air inlet temperature of the fresh air duct;
when the inlet air temperature is less than the first temperature threshold value, the heat pipe circulating system is controlled to operate, so that the fifth heat exchanging part is right the fresh air in the fresh air duct is cooled and dehumidified and the fourth heat exchanging part is used for reheating the fresh air, the heat exchanging system is controlled to operate in a dehumidification reheating mode, so that the third heat exchanging part is right the fresh air in the fresh air duct is dehumidified, the second heat exchanging part is used for reheating the dehumidified fresh air, and the first heat exchanging part is used for recovering cold energy in the exhaust air of the exhaust air duct.
Optionally, the heat pipe circulation system includes a heat pipe circulation branch, and the heat pipe circulation branch includes the fourth heat exchanging portion, a third throttling component, and the fifth heat exchanging portion that are sequentially communicated; the heat exchange system further comprises a first throttling component, a second throttling component and a first compressor, the first throttling component is arranged between the first heat exchange part and the second heat exchange part, the second throttling component is arranged between the second heat exchange part and the third heat exchange part, and the first compressor is respectively communicated with the first heat exchange part and the third heat exchange part;
when the inlet air temperature is less than the first temperature threshold value, control heat pipe circulation system operation, so that fifth heat transfer portion is right the new trend in new trend wind channel cools down the dehumidification and the fourth heat transfer portion reheats the new trend, control heat transfer system moves with dehumidification reheat mode, so that third heat transfer portion is right the new trend in new trend wind channel dehumidifies, second heat transfer portion reheats the new trend after the dehumidification, first heat transfer portion is right the step of airing exhaust in the wind channel of airing exhaust carries out cold volume recovery includes:
when the inlet air temperature is lower than the first temperature threshold and is greater than or equal to a second temperature threshold, controlling the first compressor to operate, controlling the second throttling component and the third throttling component to throttle and reduce the pressure so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, reheating the dehumidified fresh air, and recovering the cold of the exhaust air in the exhaust air duct by the first heat exchanging part; wherein the second temperature threshold is less than the first temperature threshold.
Optionally, an exhaust fan is arranged in the exhaust air duct, when the inlet air temperature is less than the first temperature threshold and is greater than or equal to the second temperature threshold, the first compressor is controlled to operate, the second throttling component and the third throttling component are controlled to throttle and reduce the pressure, so that the fifth heat exchanging portion and the third heat exchanging portion cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging portion and the second heat exchanging portion reheat the dehumidified fresh air, and the first heat exchanging portion further includes, after the step of recovering the cooling capacity of the exhaust air in the exhaust air duct:
acquiring the air outlet temperature of the fresh air duct;
adjusting the rotating speed of the exhaust fan according to the air outlet temperature; wherein, the air outlet temperature is in positive correlation with the rotating speed of the exhaust fan.
Optionally, the step of adjusting the rotation speed of the exhaust fan according to the outlet air temperature includes:
when the air outlet temperature is greater than or equal to a fourth temperature threshold value, increasing the rotating speed of the exhaust fan;
and when the air outlet temperature is smaller than the fourth temperature threshold value, reducing the rotating speed of the exhaust fan.
Optionally, the heat pipe circulation system includes a heat pipe circulation branch, and the heat pipe circulation branch includes the fourth heat exchanging portion, a third throttling component, and the fifth heat exchanging portion that are sequentially communicated; the heat pipe circulating system further comprises a heat pump branch, the heat pump branch comprises a second compressor, a return air port of the second compressor is communicated with the output end of the fifth heat exchanging part, and an exhaust port of the second compressor is communicated with the input end of the fourth heat exchanging part; the heat exchange system further comprises a first throttling component, a second throttling component and a first compressor, the first throttling component is arranged between the first heat exchange part and the second heat exchange part, the second throttling component is arranged between the second heat exchange part and the third heat exchange part, and the first compressor is respectively communicated with the first heat exchange part and the third heat exchange part;
when the inlet air temperature is less than the first temperature threshold value, control heat pipe circulation system operation, so that fifth heat transfer portion is right the new trend in new trend wind channel cools down the dehumidification and the fourth heat transfer portion reheats the new trend, control heat transfer system moves with dehumidification reheat mode, so that third heat transfer portion is right the new trend in new trend wind channel dehumidifies, second heat transfer portion reheats the new trend after the dehumidification, first heat transfer portion is right the step of airing exhaust in the wind channel of airing exhaust carries out cold volume recovery includes:
when the inlet air temperature is lower than a second temperature threshold value, the first compressor and the second compressor are controlled to operate, the second throttling component and the third throttling component are controlled to throttle and reduce the pressure, so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging part and the second heat exchanging part reheat the dehumidified fresh air, and the first heat exchanging part recovers cold of the exhaust air in the exhaust air duct; wherein the second temperature threshold is less than the first temperature threshold.
Optionally, an exhaust fan is arranged in the exhaust air duct; when the inlet air temperature is less than the second temperature threshold value, the first compressor and the second compressor are controlled to operate, the second throttling component and the third throttling component are controlled to throttle and reduce the pressure, so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging part and the second heat exchanging part reheat the dehumidified fresh air, and the first heat exchanging part further comprises the following steps of cooling recovery of the exhaust air in the exhaust air duct:
acquiring the air outlet temperature of the fresh air duct;
and adjusting the operating parameters of the first compressor, the operating parameters of the second compressor or the rotating speed of the exhaust fan according to the outlet air temperature.
Optionally, the step of adjusting the operating parameter of the first compressor, the operating parameter of the second compressor, or the rotation speed of the exhaust fan according to the outlet air temperature includes:
when the outlet air temperature is greater than or equal to a fourth temperature threshold value, reducing the operating frequency of the second compressor;
and when the outlet air temperature is lower than the fourth temperature threshold value, reducing the rotating speed of the exhaust fan or closing the first compressor.
Optionally, the heat exchange system further includes a first throttling component, a second throttling component and a first compressor, the first throttling component is disposed between the first heat exchange portion and the second heat exchange portion, the second throttling component is disposed between the second heat exchange portion and the third heat exchange portion, and the first compressor is respectively communicated with the first heat exchange portion and the third heat exchange portion; the control method further comprises the following steps:
when the inlet air temperature is greater than or equal to the first temperature threshold value, the first compressor is controlled to operate, the first throttling component is controlled to throttle and reduce the pressure, so that the third heat exchanging part and the second heat exchanging part cool the fresh air in the fresh air duct, and the first heat exchanging part recovers cold of the exhausted air in the exhausted air duct.
In addition, in order to achieve the above object, the present invention also provides a fresh air device, including: the control program of the fresh air equipment is executed by the processor to realize the steps of the control method of the fresh air equipment.
In addition, in order to achieve the above object, the present invention further provides a storage medium, on which a control program of a fresh air device is stored, and when the control program of the fresh air device is executed by a processor, the steps of the control method of the fresh air device are implemented.
According to the technical scheme, the air inlet temperature of an air inlet of a fresh air duct is obtained firstly, when the air inlet temperature is smaller than a first temperature threshold value, the heat pipe circulating system is controlled to operate, so that a fifth heat exchanging part cools and dehumidifies fresh air of the fresh air duct, a fourth heat exchanging part reheats the dehumidified fresh air, the heat exchanging system is controlled to operate in a dehumidification and reheating mode, so that a third heat exchanging part dehumidifies the fresh air of the fresh air duct, a second heat exchanging part reheats the dehumidified fresh air, and the first heat exchanging part recovers cold energy of exhaust air of an exhaust air duct; the fifth heat exchange part recovers the heat of the fresh air, and then the dehumidified fresh air is reheated by the fourth heat exchange part; the first heat exchanging part recovers the cold energy of the exhaust air in the exhaust air duct, and then the third heat exchanging part cools and dehumidifies the fresh air so as to enable the fresh air equipment to operate in an energy-saving mode.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fresh air device according to an embodiment of the present invention;
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;
FIG. 4 is a schematic flow chart diagram illustrating a control method of a fresh air device according to a second embodiment of the present invention;
FIG. 5 is a schematic flow chart of a control method for a fresh air device according to a third embodiment of the present invention;
FIG. 6 is a detailed flowchart of step S24 in FIG. 5;
fig. 7 is a schematic flow chart of a control method of a fresh air device according to a fourth embodiment of the present invention;
FIG. 8 is a schematic flow chart of a fifth embodiment of a control method for a fresh air device according to the present invention;
fig. 9 is a detailed flowchart of step S26 in fig. 8.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name(s)
1 Fresh air duct 11 New fan
2 Air exhaust duct 21 Exhaust fan
3 Heat exchange system 31 First heat exchange part
32 Second heat exchange part 33 Third heat exchange part
34 First throttling part 35 Second throttling part
36 First compressor 37 Four-way valve
38 Sixth heat exchange part 39 Outdoor fan
4 Heat pipe circulating system 41 Heat pipe circulation branch
411 The fourth heat exchange part 412 Fifth heat exchange part
413 Third throttling element 414 First switch valve
42 Heat pump branch 421 Second compressor
422 Second switch valve 423 Third on-off valve
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
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 1 is a schematic structural diagram of a hardware operating environment of the fresh air device.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic 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 terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include an operating system, a network communication module, a user interface module, and a control method program of the fresh air appliance therein.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a control method program of the fresh air device stored in the memory 1005, and perform the following operations:
acquiring the air inlet temperature of the fresh air duct;
when the inlet air temperature is less than the first temperature threshold value, the heat pipe circulating system is controlled to operate, so that the fifth heat exchanging part is right the fresh air in the fresh air duct is cooled and dehumidified and the fourth heat exchanging part is used for reheating the fresh air, the heat exchanging system is controlled to operate in a dehumidification reheating mode, so that the third heat exchanging part is right the fresh air in the fresh air duct is dehumidified, the second heat exchanging part is used for reheating the dehumidified fresh air, and the first heat exchanging part is used for recovering cold energy in the exhaust air of the exhaust air duct.
The embodiment of the present invention provides an embodiment of a control method for a fresh air device, and it should be noted that, although a logical sequence is shown in a flowchart, in some cases, the steps shown or described may be executed in a sequence different from that here.
As shown in fig. 2, the fresh air device of the present invention includes a fresh air duct 1, an exhaust air duct 2, a heat exchange system 3 and a heat pipe circulation system 4, wherein the heat exchange system 3 includes a first heat exchanging portion 31, a second heat exchanging portion 32 and a third heat exchanging portion 33, and the third heat exchanging portion 33 and the second heat exchanging portion 32 are sequentially arranged along a fresh air flowing direction; the air in the exhaust air duct 2 exchanges heat with the first heat exchanging portion 31, the air in the fresh air duct 1 exchanges heat with the second heat exchanging portion 32 and the third heat exchanging portion 33, the heat pipe circulating system 4 includes a fourth heat exchanging portion 411 and a fifth heat exchanging portion 412, the fourth heat exchanging portion 411 is disposed between the second heat exchanging portion 32 and the third heat exchanging portion 33, and the fifth heat exchanging portion 412 is disposed between the third heat exchanging portion 33 and the air inlet of the fresh air duct 1.
As shown in fig. 2, a fresh air fan 11 is arranged in the fresh air duct 1, so that fresh air enters the room from the fresh air duct 1 through the fresh air fan 11, the air flow speed in the fresh air duct 1 can be increased by increasing the rotation speed of the fresh air fan 11, and correspondingly, the air flow speed in the fresh air duct 1 can be decreased by decreasing the rotation speed of the fresh air fan 11; the exhaust fan 21 is provided in the exhaust air duct 2 to exhaust the indoor air from the exhaust air duct 2 through the exhaust fan 21, increasing the rotation speed of the exhaust fan 21 can increase the air flow speed in the exhaust air duct 2, and correspondingly, decreasing the rotation speed of the exhaust fan 21 can decrease the air flow speed in the exhaust air duct 2.
The first heat exchanging portion 31 is disposed in the exhaust air duct 2, so that the air in the exhaust air duct 2 exchanges heat with the first heat exchanging portion 31, and the heat or the cold of the air in the exhaust air duct 2 is recovered by the first heat exchanging portion 31; the third heat exchanging part 33 and the second heat exchanging part 32 are sequentially arranged in the fresh air duct 1 along the fresh air flowing direction, so that the air in the fresh air duct 1 exchanges heat with the second heat exchanging part 32 and the third heat exchanging part 33, and the heat or the cold recovered by the first heat exchanging part 31 in the exhaust air duct 2 is released in the fresh air duct 1 through the second heat exchanging part 32 and the third heat exchanging part 33, so as to reduce the energy consumption of the fresh air equipment; the fourth heat exchanging portion 411 and the fifth heat exchanging portion 412 are both disposed in the fresh air duct, and the fifth heat exchanging portion 412 can recover heat of the fresh air in the fresh air duct 1, and the fourth heat exchanging portion 411 releases the recovered heat, so that heat of the fresh air is increased, and energy consumption of the fresh air equipment is reduced.
As shown in fig. 3, in a first embodiment of the present invention, a control method for a fresh air device of the present invention includes the following steps:
and S10, acquiring the air inlet temperature of the fresh air duct.
In the embodiment of the invention, the heat exchange system 3 and the heat pipe circulation system 4 are arranged, when the inlet air temperature of the fresh air duct 1 is different, the cooling and dehumidifying requirements of the fresh air equipment on the fresh air of the fresh air duct 1 are judged according to the inlet air temperature, if the inlet air temperature is higher, the dehumidifying requirement is higher, and the dehumidifying on the fresh air needs to be increased; if the inlet air temperature is lower, it indicates that the dehumidification demand is lower, can reduce the dehumidification to the new trend to according to the cooling dehumidification demand to the new trend, control heat transfer system 3 and heat pipe circulation system 4 operation, make the energy-conserving operation of new trend equipment.
And S20, when the inlet air temperature is lower than the first temperature threshold value, controlling the heat pipe circulating system to operate so that the fifth heat exchanging part cools and dehumidifies the fresh air in the fresh air duct and the fourth heat exchanging part reheats the fresh air, controlling the heat exchanging system to operate in a dehumidification and reheating mode so that the third heat exchanging part dehumidifies the fresh air in the fresh air duct, reheating the dehumidified fresh air and recovering the cold energy of the exhaust air in the exhaust air duct by the first heat exchanging part.
When the temperature of the inlet air is lower than a first temperature threshold value preset by a user, the temperature of the fresh air meets the dehumidification condition of the fresh air equipment, and the heat pipe circulation system 4 and the heat exchange system 3 need to be controlled to operate to cool, dehumidify and reheat the fresh air in the fresh air duct 1; in the heat pipe cycle system 4, the refrigerant flows from the fourth heat exchanging portion 411 to the fifth heat exchanging portion 412, and then flows back from the fifth heat exchanging portion 412 to the fourth heat exchanging portion 411, so as to achieve the effect of dehumidifying and reheating fresh air; in the heat exchange system 3, the refrigerant flows from the first heat exchanging portion 31 to the second heat exchanging portion 32 and the third heat exchanging portion 33 in sequence, so that the fresh air is dehumidified and then reheated.
After the heat pipe circulation system 4 and the heat exchange system 3 are controlled to operate, the heat pipe circulation system 4 firstly exchanges heat with fresh air at the third heat exchange part 33 and the air inlets of the fresh air duct 1, cools and dehumidifies the fresh air in the fresh air duct 1, recovers the heat of the fresh air, then the fresh air passes through the third heat exchange part 33 again, so that the fresh air is cooled and dehumidified through the third heat exchange part 33, the fresh air cooled and dehumidified between the second heat exchange part 32 and the third heat exchange part 33 is reheated through the heat pipe circulation system 4, and finally the fresh air is reheated for the second time through the second heat exchange part 32, so that the fresh air is dehumidified and reheated by fresh air equipment; the first heat exchanging part 31 heats the exhaust air in the exhaust air duct 2, and simultaneously recovers the cooling capacity of the exhaust air, and the heat pipe circulating system 4 recovers the heat of the fresh air between the third heat exchanging part 33 and the air inlet of the fresh air duct 1, so as to reduce the energy consumption of the fresh air equipment and enable the fresh air equipment to operate in an energy-saving manner.
In this embodiment, when the inlet air temperature is less than the first temperature threshold value, heat pipe circulation system 4 and heat exchange system 3 can be started, the running state of heat pipe circulation system 4 and heat exchange system 3 can also be switched, in order to control the operation of heat pipe circulation system 4 and heat exchange system 3, make fifth heat exchange portion 412 cool down the fresh air of fresh air duct 1 and dehumidify and fourth heat exchange portion 411 reheat the fresh air, third heat exchange portion 33 dehumidifies the fresh air of fresh air duct 1, second heat exchange portion 32 reheats the fresh air after the dehumidification, first heat exchange portion 31 carries out cold volume recovery to airing exhaust of air duct 2.
As shown in fig. 2, the heat exchange system 3 further includes a first compressor 36, a first throttling member 34 and a second throttling member 35, the first throttling member 34 is disposed between the first heat exchange portion 31 and the second heat exchange portion 32, the second throttling member 35 is disposed between the second heat exchange portion 32 and the third heat exchange portion 33, and both ends of the first compressor 36 are respectively communicated with the first heat exchange portion 31 and the third heat exchange portion 33, so that the first heat exchange portion 31, the second heat exchange portion 32 and the third heat exchange portion 33 can be reheated or cooled correspondingly by controlling the opening degrees of the first throttling member 34 and the second throttling member 35; when the fresh air equipment is used for cooling and dehumidifying the fresh air and then reheating the fresh air, the first compressor 36 is controlled to operate, so that the refrigerant flows from the first compressor 36 to the first heat exchanging part 31, the first throttling part 34, the second heat exchanging part 32 and the second throttling part 35 in sequence, and flows back to the first compressor 36 from the second throttling part 35 to form a refrigerant circulating loop; the second throttling part 35 is controlled to throttle and reduce the pressure, the first throttling part 34 is opened without throttling, so that the first heat exchanging part 31 heats the exhaust air of the exhaust air duct 2, the second heat exchanging part 32 reheats the dehumidified fresh air, and the third heat exchanging part 33 cools and dehumidifies the fresh air.
As shown in fig. 2, the heat exchange system 3 further includes a sixth heat exchange portion 38, the sixth heat exchange portion 38 is communicated between the first heat exchange portion 31 and the first compressor 36, and the sixth heat exchange portion 38 is disposed outside the fresh air duct 1, when the first compressor 36 is controlled to operate, and when the refrigerant flows from the first compressor 36 to the sixth heat exchange portion 38, the first heat exchange portion 31, the first throttling component 34, the second heat exchange portion 32, and the second throttling component 35 in sequence, the refrigerant exchanges heat with the outdoor air in the sixth heat exchange portion 38, so as to reduce the temperature of the refrigerant, and improve the cooling and dehumidifying effects of the third heat exchange portion 33 on the fresh air.
As shown in fig. 2, the heat exchange system 3 further includes an outdoor fan 39, and the outdoor fan 39 is configured to adjust a flow rate of air flowing to the sixth heat exchanger, so as to adjust heat exchange efficiency between the sixth heat exchanger and outdoor air.
In one example, by starting the heat exchange system 3, the heat or the cold of the air in the exhaust air duct 2 is recovered through the first heat exchange portion 31, and then the recovered heat or the recovered cold is released at the second heat exchange portion 32 or/and the third heat exchange portion 33, so that the energy-saving operation of the fresh air equipment is realized, but the heat of the fresh air in the fresh air duct 1 cannot be recovered, which causes waste.
In the embodiment of the invention, the heat pipe circulation system 4 and the heat exchange system 3 are controlled to operate simultaneously, so that the fifth heat exchange part 412 recovers the heat of the fresh air, and then the fourth heat exchange part 411 reheats the dehumidified fresh air; the first heat exchanging part 31 of the heat exchanging system 3 recovers the cold energy of the exhaust air in the exhaust air duct 2, and then the third heat exchanging part 33 cools and dehumidifies the fresh air, so that the fresh air equipment can operate in an energy-saving manner.
As shown in fig. 2, in the second embodiment of the present invention, the heat pipe cycle system 4 includes a heat pipe cycle branch 41, and the heat pipe cycle branch 41 includes a fourth heat exchanging part 411, a third throttling part 413, and a fifth heat exchanging part 412, which are sequentially communicated; the fourth heat exchanging portion 411 is disposed between the second heat exchanging portion 32 and the third heat exchanging portion 33, and the fifth heat exchanging portion 412 is disposed between the third heat exchanging portion 33 and the air inlet of the fresh air duct 1.
As shown in fig. 4, when the inlet air temperature is less than the first temperature threshold, the operation of the heat pipe circulation system is controlled, so that the fifth heat exchanging part cools down and dehumidifies the fresh air in the fresh air duct and the fourth heat exchanging part reheats the fresh air, the heat exchanging system is controlled to operate in a dehumidification and reheating mode, so that the third heat exchanging part dehumidifies the fresh air in the fresh air duct, the second heat exchanging part reheats the dehumidified fresh air, and the first heat exchanging part performs cold energy recovery on the exhaust air in the exhaust air duct, including:
and S21, when the inlet air temperature is less than the first temperature threshold and is greater than or equal to the second temperature threshold, controlling the first compressor to operate, controlling the second throttling component and the third throttling component to throttle and reduce the pressure so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, reheating the dehumidified fresh air by the fourth heat exchanging part and the second heat exchanging part, and recovering the cold of the exhaust air in the exhaust air duct by the first heat exchanging part.
When the inlet air temperature of the fresh air duct 1 is less than a first temperature threshold preset by a user and is greater than or equal to a second temperature threshold preset by the user, it is indicated that the temperature of the fresh air is high, the high-temperature dehumidification condition of the fresh air equipment is met, the first compressor 36 is controlled to operate, so that the refrigerant flows from the first compressor 36 to the first heat exchanging part 31, the first throttling part 34, the second heat exchanging part 32, the second throttling part 35 and the third heat exchanging part 33 in sequence, the second throttling part 35 and the third throttling part 413 are controlled to perform throttling and pressure reducing operations, the first throttling part 34 is opened without throttling, so that the fifth heat exchanging part 412 and the third heat exchanging part 33 cool and dehumidify the fresh air in the fresh air duct 1, the fourth heat exchanging part 411 and the second heat exchanging part 32 reheat the dehumidified fresh air, and the first heat exchanging part 31 recovers the cooling capacity of the exhausted air in the exhausted air duct 2, thereby realizing the effect of reheating the fresh air in the fresh air duct 1 after high-temperature dehumidification; the refrigerant of the fourth heat exchanging part 411 flows from the fourth heat exchanging part 411 to the third throttling part 413 and the fifth heat exchanging part 412 in sequence, and then flows back to the fourth heat exchanging part 411 from the fifth heat exchanging part 412. Wherein the second temperature threshold is less than the first temperature threshold.
Since the third throttling part 413 throttles and reduces the pressure, the fourth heat exchanging part 411 is disposed between the second heat exchanging part 32 and the third heat exchanging part 33, the fresh air cooled by the third heat exchanging part 33 can reduce the temperature of the refrigerant in the fourth heat exchanging part 411 when passing through the fourth heat exchanging part 411, and the fresh air can heat the refrigerant in the fifth heat exchanging part 412 when passing through the fifth heat exchanging part 412, so that the temperature of the refrigerant in the fourth heat exchanging part 411 is lower than the temperature of the refrigerant in the fifth heat exchanging part 412, thereby forming a pressure difference, and the refrigerant can flow from the fourth heat exchanging part 411 to the fifth heat exchanging part 412, and then flow back to the fourth heat exchanging part 411 from the fifth heat exchanging part 412 to form a cycle.
As shown in fig. 5, in the third embodiment of the present invention, when the intake air temperature is less than the first temperature threshold and greater than or equal to the second temperature threshold, the first compressor is controlled to operate, the second throttling component and the third throttling component are controlled to throttle and depressurize, so that the fifth heat exchanging portion and the third heat exchanging portion cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging portion and the second heat exchanging portion reheat the dehumidified fresh air, and the step of the first heat exchanging portion recovering the cooling capacity of the exhaust air in the exhaust air duct further includes:
s23, acquiring the air outlet temperature of the fresh air duct;
and S24, adjusting the rotating speed of the exhaust fan according to the outlet air temperature.
The operation of the first compressor 36 is controlled, the second throttling component 35 and the third throttling component 413 are controlled to perform throttling and pressure reduction work, so that the fifth heat exchanging part 412 and the third heat exchanging part 33 cool and dehumidify the fresh air in the fresh air duct 1, the fourth heat exchanging part 411 and the second heat exchanging part 32 reheat the dehumidified fresh air, the first heat exchanging part 31 performs cooling return on the exhaust air of the exhaust air duct 2, the cooling return is adjusted according to the inlet air temperature of the fresh air duct 1, and whether the temperature of the fresh air exhausted from the fresh air duct 1 meets the user requirements or not needs to be determined again; therefore, the air outlet temperature of the air outlet of the fresh air duct 1 can be acquired, and the rotating speed of the exhaust fan 21 is adjusted according to the positive correlation characteristic between the air outlet temperature and the rotating speed of the exhaust fan 21, so that the rotating speed of the exhaust fan 21 is adjusted, and after the fresh air equipment dehumidifies and reheats the fresh air, the temperature of the discharged fresh air meets the user requirements.
Optionally, as shown in fig. 6, the step of adjusting the rotation speed of the exhaust fan according to the outlet air temperature includes:
step S241, when the air outlet temperature is greater than or equal to the fourth temperature threshold value, increasing the rotating speed of the exhaust fan;
in step S242, when the outlet air temperature is lower than the fourth temperature threshold, the rotation speed of the exhaust fan is reduced.
When the outlet air temperature is greater than or equal to the fourth temperature threshold, it indicates that the outlet air temperature is high, and the reheating amount of the cooled and dehumidified fresh air by the second heat exchanging portion 32 and the fourth heat exchanging portion 411 is large, so that the rotation speed of the exhaust fan 21 can be increased, the heat exchange efficiency of the exhaust air of the first heat exchanging portion 31 and the exhaust air duct 2 is improved, the temperature of the refrigerant is reduced, the reheating amount of the fresh air by the first heat exchanging portion 31 is reduced, and the fresh air equipment can operate in an energy-saving manner.
When the outlet air temperature is lower than the fourth temperature threshold, it indicates that the outlet air temperature is lower, and the reheating amount of the cooled and dehumidified fresh air by the second heat exchanging portion 32 and the fourth heat exchanging portion 411 is smaller, so that the rotating speed of the exhaust fan 21 can be reduced, the heat exchange efficiency of the exhaust air of the first heat exchanging portion 31 and the exhaust air duct 2 is reduced, the temperature of the refrigerant is increased, the reheating amount of the fresh air by the first heat exchanging portion 31 is increased, and the fresh air equipment can operate in an energy-saving manner.
As shown in fig. 2, in the fourth embodiment of the present invention, the heat pipe cycle 4 further includes a heat pump branch 42, the heat pump branch 42 includes a second compressor 421, a return air port of the second compressor 421 communicates with an output end of the fifth heat exchanging portion 412, and an exhaust port of the second compressor 421 communicates with an input end of the fourth heat exchanging portion 411.
As shown in fig. 7, when the temperature of the intake air is less than the first temperature threshold, the heat pipe circulation system is controlled to operate, so that the fifth heat exchanging portion cools and dehumidifies the fresh air in the fresh air duct and the fourth heat exchanging portion reheats the fresh air, the heat exchanging system is controlled to operate in the dehumidification reheating mode, so that the third heat exchanging portion dehumidifies the fresh air in the fresh air duct, the second heat exchanging portion reheats the dehumidified fresh air, and the step of the first heat exchanging portion recovering the cooling capacity of the exhaust air in the exhaust air duct includes:
and S22, when the inlet air temperature is lower than a second temperature threshold value, controlling the first compressor and the second compressor to operate, controlling the second throttling component and the third throttling component to throttle and reduce the pressure so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, reheating the dehumidified fresh air by the fourth heat exchanging part and the second heat exchanging part, and recovering cold energy from the exhaust air in the exhaust air duct by the first heat exchanging part.
When the inlet air temperature of the fresh air duct 1 is lower than a second temperature threshold value, the temperature of the fresh air is lower, the low-temperature dehumidification condition of the fresh air equipment is met, the first compressor 36 and the second compressor 421 can be controlled to operate, the second throttling component 35 and the third throttling component 413 are controlled to throttle and reduce the pressure, so that in the heat exchange system 3, a refrigerant flows from the first compressor 36 to the first heat exchanging part 31, the first throttling component 34, the second heat exchanging part 32, the second throttling component 35 and the third heat exchanging part 33 in sequence, the third heat exchanging part 33 cools and dehumidifies the fresh air in the fresh air duct 1, the second heat exchanging part 32 reheats the cooled and dehumidified fresh air, and the first heat exchanging part 31 recovers the cold energy of the exhausted air in the exhaust air duct 2; in the heat pipe cycle system 4, the refrigerant flows from the second compressor 421 to the fourth heat exchanging portion 411, the third throttling component 413 and the fifth heat exchanging portion 412 in sequence, and then flows back to the second compressor 421 from the fifth heat exchanging portion 412, so that the fifth heat exchanging portion 412 cools and dehumidifies the fresh air, and the fourth heat exchanging portion 411 reheats the cooled and dehumidified fresh air; since the pressure of the return air port of the second compressor 421 is controlled to be lower than the pressure of the input end of the fourth heat exchanging part 411 when the second compressor 421 operates, the refrigerant does not directly flow from the fifth heat exchanging part 412 to the fourth heat exchanging part 411, but flows back to the second compressor 421; by controlling the operation of the second compressor 421, the reheating amount of the fourth heat exchanging portion 411 to the cooled and dehumidified fresh air can be increased, so that the temperature of the fresh air discharged into the room from the fresh air equipment can meet the user requirement.
As shown in fig. 8, in the fifth embodiment of the present invention, when the intake air temperature is lower than the second temperature threshold, the steps of controlling the first compressor and the second compressor to operate, controlling the second throttling component and the third throttling component to perform throttling and depressurizing operations, so that the fifth heat exchanging portion and the third heat exchanging portion cool and dehumidify the fresh air in the fresh air duct, reheating the dehumidified fresh air by the fourth heat exchanging portion and the second heat exchanging portion, and performing cooling capacity recovery on the exhaust air in the exhaust air duct by the first heat exchanging portion further include:
s25, acquiring the air outlet temperature of a fresh air duct;
and S26, adjusting the operation parameters of the first compressor, the operation parameters of the second compressor 1 or the rotating speed of the exhaust fan according to the outlet air temperature.
Whether the temperature of the fresh air discharged into the room from the fresh air equipment meets the user requirements or not can be determined by detecting the air outlet temperature of the air outlet of the fresh air duct 1, and the operation parameters of the first compressor 36, the operation parameters of the second compressor 421 or the rotating speed of the exhaust fan 21 can be adjusted, so that the fresh air equipment can operate in an energy-saving mode.
Optionally, as shown in fig. 9, the step of adjusting the operation parameter of the first compressor, the operation parameter of the second compressor, or the rotation speed of the exhaust fan according to the outlet air temperature includes:
step 261, when the outlet air temperature is greater than or equal to the fourth temperature threshold, reducing the operating frequency of the second compressor;
and step S262, when the outlet air temperature is lower than the fourth temperature threshold value, reducing the rotating speed of the exhaust fan or closing the first compressor.
When the outlet air temperature is greater than or equal to the fourth temperature threshold, it indicates that the outlet air temperature is higher, and the reheating quantity of the second heat exchanging portion 32 and the fourth heat exchanging portion 411 to the cooled and dehumidified fresh air is larger, so that the operating frequency of the second compressor 421 can be reduced, the reheating quantity of the fourth heat exchanging portion 411 to the cooled and dehumidified fresh air is reduced, and the fresh air equipment is enabled to operate in an energy-saving manner.
When the outlet air temperature is lower than the fourth temperature threshold, the outlet air temperature is lower, the reheating amount of the cooled and dehumidified fresh air by the second heat exchanging part 32 and the fourth heat exchanging part 411 is smaller, the rotating speed of the exhaust fan 21 can be reduced, the heat exchange efficiency of the exhaust air of the first heat exchanging part 31 and the exhaust air duct 2 is reduced, the cold quantity recovered by the first heat exchanging part 31 is reduced, and the reheating amount of the cooled and dehumidified fresh air by the second heat exchanging part 32 is increased, so that the outlet air temperature is increased; or, the first compressor 36 may also be closed, so that the third heat exchanging portion 33 stops cooling and dehumidifying the fresh air, the fresh air is cooled and dehumidified only through the fifth heat exchanging portion 412, and the cooled and dehumidified fresh air is reheated through the fourth heat exchanging portion 411, so as to increase the air outlet temperature, and thus, the fresh air equipment can operate in an energy-saving manner.
When the temperature of the inlet air is greater than or equal to the first temperature threshold value, the temperature is too high, the refrigeration condition of the fresh air equipment is met, and the fresh air equipment needs to be started to refrigerate the fresh air so as to meet the user requirement; therefore, the first compressor 36 can be controlled to operate, the first throttling part 34 is controlled to work in a throttling and pressure reducing mode, the second throttling part 35 is opened and is not throttled, so that the refrigerant flows from the first compressor 36 to the first heat exchanging part 31, the first throttling part 34, the second heat exchanging part 32, the second throttling part 35 and the third heat exchanging part 33 in sequence, and then flows back to the first compressor 36 from the third heat exchanging part 33 to form a cycle, so that the third heat exchanging part 33 and the second heat exchanging part 32 cool the fresh air in the fresh air duct 1, the first heat exchanging part 31 recovers the cold of the exhaust air in the exhaust air duct 2, the heat pipe circulation system 4 is not needed to work, and the refrigeration of the fresh air is realized.
When the fresh air equipment operates in a refrigeration mode, when the fresh air in the fresh air duct 1 is refrigerated, the outlet air temperature of the air outlet of the fresh air duct 1 is obtained, if the outlet air temperature is greater than or equal to a third temperature threshold value, the outlet air temperature is higher, the rotating speed of the exhaust fan 21 can be increased, the heat exchange efficiency of the exhaust air of the first heat exchanging part 31 and the exhaust air duct 2 is improved, the temperature of a refrigerant in the first heat exchanging part 31 is reduced, the refrigerating capacities of the second heat exchanging part 32 and the third heat exchanging part 33 are improved, the outlet air temperature is reduced, and the fresh air equipment can operate in an energy-saving mode; if the outlet air temperature is lower than the third temperature threshold, which indicates that the outlet air temperature is lower, the operating frequency of the first compressor 36 may be reduced to reduce the refrigerating capacity of the second heat exchanging portion 32 and the third heat exchanging portion 33 for fresh air, and the outlet air temperature is increased, so that the fresh air equipment is operated in an energy-saving manner.
As shown in fig. 2, the heat exchange system 3 further includes a four-way valve 37, the first compressor 36 is respectively communicated with the first heat exchanging portion 31 and the third heat exchanging portion 33 through the four-way valve 37, so as to change the flow direction of the refrigerant flowing out of the first compressor 36 through the four-way valve 37; therefore, during cooling, the four-way valve 37 is controlled to enable the refrigerant to flow from the first compressor 36 to the first heat exchanging portion 31, and during heating, the four-way valve 37 is controlled to enable the refrigerant to flow from the first heat exchanging portion 31 to the third heat exchanging portion 33, so that switching of fresh air cooling and heating by fresh air equipment is realized.
When the fresh air equipment is started, firstly determining a target operation mode of the fresh air equipment, if the target operation mode is a refrigeration mode, acquiring the air inlet temperature of the fresh air duct 1, and controlling the heat pipe circulation system 4 and the heat exchange system 3 to operate according to the air inlet temperature so as to correspondingly refrigerate or cool and dehumidify the fresh air of the fresh air duct 1 and then reheat the fresh air; if the target operation mode is a heating mode, the first compressor 36 is controlled to operate, so that the refrigerant flows from the first compressor 36 to the third heat exchanging portion 33, the second throttling component 35 (or passes through a bypass branch connected in parallel with the second throttling component 35 to enable the second throttling element not to throttle), the second heat exchanging portion 32, the first throttling component 34 and the first heat exchanging portion 31 in sequence, and then flows back to the first compressor 36 from the first heat exchanging portion 31 to form a cycle, the first throttling component 34 is controlled to throttle and reduce the pressure, the second throttling component 35 is opened to enable the second heat exchanging portion 32 and the third heat exchanging portion 33 to heat the fresh air in the fresh air duct 1, the heat pipe circulation system 4 does not need to be started, the fresh air equipment heats the fresh air, and the first heat exchanging portion 31 recovers the heat of the exhaust air in the exhaust air duct 2 to enable the fresh air equipment to operate in an energy-saving manner. When the target operation mode of the fresh air device is determined, the target operation mode may be determined according to a target operation mode set by a user, or the target operation mode may be determined according to an outdoor temperature, which is not limited herein.
In the heating mode of the operation of the fresh air equipment, when the fresh air in the fresh air duct 1 is heated, if the air outlet temperature of the air outlet of the fresh air duct 1 is greater than or equal to the fifth temperature threshold, it indicates that the air outlet temperature is higher, the operating frequency of the first compressor 36 can be reduced, so that the heating capacity of the second heat exchanging part 32 and the third heat exchanging part 33 on the fresh air is reduced, the air outlet temperature is reduced, and the fresh air equipment can operate in an energy-saving manner; if the outlet air temperature is lower than the fifth temperature threshold, it indicates that the outlet air temperature is lower, the rotation speed of the exhaust fan 21 can be increased, the heat exchange efficiency of the first heat exchanging portion 31 and the exhaust air of the exhaust air duct 2 is improved, the heating of the fresh air by the second heat exchanging portion 32 and the third heat exchanging portion 33 is increased, the outlet air temperature is improved, and the fresh air equipment can operate in an energy-saving manner.
In an embodiment of the invention, the third temperature threshold < the fourth temperature threshold < the fifth temperature threshold.
As shown in fig. 2, the heat pipe circulation branch 41 further includes a first switch valve 414, the first switch valve 414 is disposed between the air return port of the second compressor 421 and the air exhaust port of the second compressor 421 to conduct the fifth heat exchanging portion 412 and the fourth heat exchanging portion 411 in a single direction, so as to prevent the refrigerant from flowing out of the air exhaust port of the second compressor 421 and then flowing toward the fifth heat exchanging portion 412 when the second compressor 421 is started; the heat pump branch line 42 further includes a second switch valve 422 and a third switch valve 423, the second switch valve 422 is disposed at an exhaust port of the second compressor 421 to unidirectionally conduct the second compressor 421 and the fourth heat exchanging part 411, so as to prevent the refrigerant from flowing toward the exhaust port of the second compressor 421 when flowing from the fifth heat exchanging part 412 to the fourth heat exchanging part 411; the third switching valve 423 is disposed at a return port of the second compressor 421 to open or close a passage between the second compressor 421 and the fifth heat exchanging part 412. The first switch valve 414 and the second switch valve 422 may be both one-way valves, and the third switch valve 423 may be a solenoid valve; when the target operation mode of the fresh air device is a heating mode, and the inlet air temperature of the air inlet of the fresh air duct 1 is greater than or equal to a first temperature threshold value or the inlet air temperature is less than a second temperature threshold value, the third on-off valve 423 may be opened; when the intake air temperature is less than the first temperature threshold and greater than or equal to the second temperature threshold, the third on/off valve 423 may be closed.
For example, a first temperature threshold value is set to be 32-35 ℃, a second temperature threshold value is set to be 20-25 ℃, a third temperature threshold value is set to be 13-15 ℃, a fourth temperature threshold value is set to be 18-22 ℃, and a fifth temperature threshold value is set to be 35-40 ℃; the user starts a machine to set a refrigeration mode, the fresh air fan 11 and the exhaust fan 21 are started, the fresh air temperature is 34 ℃ equal to a first temperature threshold value, the high-temperature dehumidification reheating mode is entered, the third switch valve 423 is closed, the second throttling part 35 and the third throttling part 413 are controlled to work in a throttling and pressure reducing mode, the first throttling part 34 is opened without throttling, so that the sixth heat exchanging part 38 is reheated, the first heat exchanging part 31 is reheated, the second heat exchanging part 32 is reheated, the third heat exchanging part 33 is cooled, the fourth heat exchanging part 411 is reheated, the fifth heat exchanging part 412 is cooled and dehumidified, the fresh air is cooled to 30 ℃ through the fifth heat exchanging part 412, is cooled to 12 ℃ through the third heat exchanging part 33, is heated to 16 ℃ through the fourth heat exchanging part 411, is heated to 23 ℃ through the second heat exchanging part 32, the air outlet temperature is 23 ℃ and is greater than the fourth temperature threshold value, the reheating of the second heat exchanging part 32 is reduced by increasing the rotating speed of the exhaust fan 21, and the air outlet temperature is reduced.
For another example, setting a first temperature threshold value to be 32-35 ℃, a second temperature threshold value to be 20-25 ℃, a third temperature threshold value to be 13-15 ℃, a fourth temperature threshold value to be 18-22 ℃ and a fifth temperature threshold value to be 35-40 ℃; the user starts up and sets the heating mode, the fresh air fan 11 and the exhaust fan 21 are started, the second compressor 421 is closed, the third switch valve 423 is opened, the third throttling part 413 is controlled to be closed, the first throttling part 34 throttles and reduces the pressure to work, the second throttling part 35 is opened and does not throttle, so that the first heat exchanging part 31 is cooled, the second heat exchanging part 32 is reheated, the third heat exchanging part 33 is reheated, and the sixth heat exchanging part 38 is cooled, at the moment, the outlet air temperature is 45 ℃ and is greater than a fifth temperature threshold value, and the energy-saving operation is realized by reducing the operating frequency of the first compressor 36.
The control method of the fresh air equipment can control the fresh air equipment to run in an energy-saving mode under all working conditions in a heating mode, a high-temperature dehumidification reheating mode, a low-temperature dehumidification reheating mode and a heating mode.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. The control method of the fresh air equipment is characterized in that the fresh air equipment comprises a fresh air duct, an exhaust air duct, a heat exchange system and a heat pipe circulating system, the heat exchange system comprises a first heat exchange part, a second heat exchange part and a third heat exchange part, and the third heat exchange part and the second heat exchange part are sequentially arranged in the fresh air duct along the flow direction of fresh air; the air in the exhaust air duct exchanges heat with the first heat exchange part, the air in the fresh air duct exchanges heat with the second heat exchange part and the third heat exchange part, the heat pipe circulating system comprises a fourth heat exchange part and a fifth heat exchange part, the fourth heat exchange part is arranged between the second heat exchange part and the third heat exchange part, and the fifth heat exchange part is arranged between the third heat exchange part and an air inlet of the fresh air duct;
the heat pipe circulating system comprises a heat pipe circulating branch, and the heat pipe circulating branch comprises a fourth heat exchanging part, a third throttling part and a fifth heat exchanging part which are sequentially communicated; the heat pipe circulating system further comprises a heat pump branch, the heat pump branch comprises a second compressor, an air return port of the second compressor is communicated with the output end of the fifth heat exchanging part, and an air exhaust port of the second compressor is communicated with the input end of the fourth heat exchanging part; the heat exchange system further comprises a first throttling component, a second throttling component and a first compressor, the first throttling component is arranged between the first heat exchange part and the second heat exchange part, the second throttling component is arranged between the second heat exchange part and the third heat exchange part, and the first compressor is communicated with the first heat exchange part and the third heat exchange part respectively;
the control method of the fresh air equipment comprises the following steps:
acquiring the air inlet temperature of the fresh air duct;
when the inlet air temperature is lower than a first temperature threshold value, the heat pipe circulating system is controlled to operate, so that the fifth heat exchanging part cools and dehumidifies the fresh air in the fresh air duct and the fourth heat exchanging part reheats the fresh air, the heat exchanging system is controlled to operate in a dehumidification and reheating mode, so that the third heat exchanging part dehumidifies the fresh air in the fresh air duct, the second heat exchanging part reheats the dehumidified fresh air, and the first heat exchanging part recovers cold energy of the exhaust air in the exhaust air duct;
when the inlet air temperature is lower than a second temperature threshold value, the first compressor and the second compressor are controlled to operate, the second throttling component and the third throttling component are controlled to throttle and reduce the pressure, so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging part and the second heat exchanging part reheat the dehumidified fresh air, and the first heat exchanging part recovers cold of the exhaust air in the exhaust air duct; wherein the second temperature threshold is less than the first temperature threshold.
2. The control method according to claim 1, wherein the heat pipe circulation system includes a heat pipe circulation branch, the heat pipe circulation branch including the fourth heat exchanging portion, a third throttling part, and the fifth heat exchanging portion, which are sequentially communicated; the heat exchange system further comprises a first throttling component, a second throttling component and a first compressor, the first throttling component is arranged between the first heat exchange part and the second heat exchange part, the second throttling component is arranged between the second heat exchange part and the third heat exchange part, and the first compressor is respectively communicated with the first heat exchange part and the third heat exchange part;
when the inlet air temperature is less than the first temperature threshold value, control heat pipe circulation system operation, so that fifth heat transfer portion is right the new trend in new trend wind channel cools down the dehumidification and the fourth heat transfer portion reheats the new trend, control heat transfer system moves with dehumidification reheat mode, so that third heat transfer portion is right the new trend in new trend wind channel dehumidifies, second heat transfer portion reheats the new trend after the dehumidification, first heat transfer portion is right the step of airing exhaust in the wind channel of airing exhaust carries out cold volume recovery includes:
when the inlet air temperature is lower than the first temperature threshold and is greater than or equal to a second temperature threshold, controlling the first compressor to operate, controlling the second throttling component and the third throttling component to throttle and reduce the pressure so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, reheating the dehumidified fresh air, and recovering the cold of the exhaust air in the exhaust air duct by the first heat exchanging part; wherein the second temperature threshold is less than the first temperature threshold.
3. The control method according to claim 2, wherein an exhaust fan is provided in the exhaust air duct, and when the intake air temperature is lower than the first temperature threshold and is greater than or equal to a second temperature threshold, the operation of the first compressor is controlled, the second throttling component and the third throttling component are controlled to perform throttling and pressure-reducing operations, so that the fifth heat exchanging portion and the third heat exchanging portion cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging portion and the second heat exchanging portion reheat the dehumidified fresh air, and the step of the first heat exchanging portion recovering the cooling capacity of the exhaust air in the exhaust air duct further includes:
acquiring the air outlet temperature of the fresh air duct;
adjusting the rotating speed of the exhaust fan according to the air outlet temperature; wherein, the air-out temperature is in positive correlation with the rotating speed of the exhaust fan.
4. The control method according to claim 3, wherein the step of adjusting the rotation speed of the exhaust fan according to the outlet air temperature comprises:
when the air outlet temperature is greater than or equal to a fourth temperature threshold value, increasing the rotating speed of the exhaust fan;
and when the air outlet temperature is smaller than the fourth temperature threshold value, reducing the rotating speed of the exhaust fan.
5. The control method according to claim 1, wherein an exhaust fan is provided in the exhaust duct; when the inlet air temperature is less than the second temperature threshold value, the first compressor and the second compressor are controlled to operate, the second throttling component and the third throttling component are controlled to throttle and reduce the pressure, so that the fifth heat exchanging part and the third heat exchanging part cool and dehumidify the fresh air in the fresh air duct, the fourth heat exchanging part and the second heat exchanging part reheat the dehumidified fresh air, and the first heat exchanging part further comprises the following steps of cooling recovery of the exhaust air in the exhaust air duct:
acquiring the air outlet temperature of the fresh air duct;
and adjusting the operating parameters of the first compressor, the operating parameters of the second compressor or the rotating speed of the exhaust fan according to the outlet air temperature.
6. The control method of claim 5, wherein the step of adjusting the operating parameter of the first compressor, the operating parameter of the second compressor, or the rotational speed of the exhaust fan according to the outlet air temperature comprises:
when the outlet air temperature is greater than or equal to a fourth temperature threshold value, reducing the operating frequency of the second compressor;
and when the outlet air temperature is lower than the fourth temperature threshold value, reducing the rotating speed of the exhaust fan or closing the first compressor.
7. The control method according to claim 1, wherein the heat exchange system further comprises a first throttling part disposed between the first heat exchanging part and the second heat exchanging part, a second throttling part disposed between the second heat exchanging part and the third heat exchanging part, and a first compressor communicated with the first heat exchanging part and the third heat exchanging part, respectively; the control method further comprises the following steps:
when the inlet air temperature is greater than or equal to the first temperature threshold value, the first compressor is controlled to operate, the first throttling component is controlled to throttle and reduce the pressure, so that the third heat exchanging part and the second heat exchanging part cool the fresh air in the fresh air duct, and the first heat exchanging part recovers the cold of the exhausted air in the exhaust air duct.
8. A new trend equipment, its characterized in that includes: a memory, a processor and a control program for a fresh air device stored on the memory and operable on the processor, the control program for a fresh air device, when executed by the processor, implementing the steps of the method of controlling a fresh air device according to any one of claims 1 to 7.
9. A storage medium on which a control program of a fresh air device is stored, the control program of the fresh air device realizing the steps of the control method of the fresh air device according to any one of claims 1 to 7 when executed by a processor.
CN202111409150.4A 2021-11-24 2021-11-24 Fresh air equipment, control method thereof and computer-readable storage medium Active CN114087740B (en)

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