CN114110984B - Fresh air equipment, control method and device thereof and storage medium - Google Patents

Fresh air equipment, control method and device thereof and storage medium Download PDF

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Publication number
CN114110984B
CN114110984B CN202111427225.1A CN202111427225A CN114110984B CN 114110984 B CN114110984 B CN 114110984B CN 202111427225 A CN202111427225 A CN 202111427225A CN 114110984 B CN114110984 B CN 114110984B
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air
heat exchange
fresh air
moisture content
exhaust
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CN114110984A (en
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徐振坤
杜顺开
李金波
黄剑云
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
    • F24F11/64—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
    • 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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • 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
    • F24F2110/20—Humidity
    • 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]
    • Y02B30/56—Heat recovery units

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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 fresh air equipment, a control method, a control device and a storage medium thereof. The method comprises the steps of obtaining the first air moisture content of the fresh air duct before passing through the total heat exchanger and the second air moisture content of the exhaust air duct before passing through the total heat exchanger, obtaining the difference value between the air moisture content and the air moisture content, and controlling the heat exchange system to operate in a heat pump circulation mode when the difference value is smaller than a preset threshold value, so that the total heat exchange efficiency of fresh air equipment is improved, and the energy consumption of the fresh air equipment is reduced.

Description

Fresh air equipment, control method and device thereof and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to fresh air equipment, a control method, a control device and a storage medium thereof.
Background
The heat recovery fresh air machine is a device for reducing indoor cold and hot loads by utilizing recovered exhaust heat (cold quantity), and the common heat recovery fresh air machine is used for exhaust heat recovery through a total heat exchanger, for example, when fresh air inlet temperature and humidity are higher than exhaust air outlet temperature and humidity in summer, sensible heat exchange and latent heat exchange can be performed.
At present, the total heat exchange efficiency of the heat recovery fresh air machine is determined by the difference value between the fresh air inlet temperature and humidity and the air outlet temperature and humidity, and the influence of the outdoor environment temperature and the indoor environment temperature is large, for example, when refrigeration is performed under low-temperature and high-humidity weather in summer, if the outdoor temperature is lower than the indoor environment temperature, the heat recovery fresh air machine cannot perform sensible heat exchange, so that the total heat exchange efficiency of the heat recovery fresh air machine is low.
Disclosure of Invention
The embodiment of the application aims to solve the technical problem of low total heat exchange efficiency of the existing heat recovery fresh air machine by providing fresh air equipment, a control method, a control device and a storage medium thereof.
The embodiment of the application provides a control method of fresh air equipment, the fresh air equipment includes heat transfer system, fresh air wind channel, exhaust wind channel and total heat exchanger, be equipped with the fresh air fan in the fresh air wind channel, be equipped with the exhaust fan in the exhaust wind channel, the air in the fresh air wind channel with the air in the exhaust wind channel is in total heat exchanger department carries out heat exchange, heat transfer system is used for right the air in the exhaust wind channel cools down, control method includes:
Acquiring a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger;
acquiring a first difference value between the first air moisture content and the second air moisture content;
and when the first difference value is smaller than a preset threshold value, controlling the heat exchange system to operate in a heat pump cycle mode.
In one embodiment, the heat exchange system comprises a compressor, a first heat exchange portion, a throttling component, and a second heat exchange portion; the compressor, the first heat exchange part, the throttling component and the second heat exchange part are sequentially communicated to form a refrigerant circulation loop, the second heat exchange part is arranged in the exhaust air duct, and the step of controlling the heat exchange system to operate in a heat pump circulation mode comprises the following steps of:
the compressor and the throttle member are turned on.
In an embodiment, the heat exchange system further includes a first branch and a second branch connected in parallel, two ends of the first branch are respectively connected with an input end of the first heat exchange portion and an output end of the second heat exchange portion, the second branch includes a switch valve and a compressor, an exhaust port of the compressor is connected with the input end of the first heat exchange portion, an air return port of the compressor is connected with a first end of the switch valve, a second end of the switch valve is connected with the output end of the second heat exchange portion, and after the step of obtaining a first difference value between the first air moisture content and the second air moisture content, the heat exchange system further includes:
And when the first difference value is greater than or equal to the preset threshold value, closing the compressor and the switch valve so as to enable the heat exchange system to operate in a heat pipe circulation mode.
In an embodiment, the fresh air device further includes a dehumidifying device, the dehumidifying device is disposed in the fresh air duct, and is configured to dehumidify air in the fresh air duct, the first heat exchange portion is disposed in the fresh air duct, the dehumidifying device is disposed between the total heat exchanger and the first heat exchange portion, and after the step of opening the compressor and the throttling component, the dehumidifying device further includes:
acquiring the moisture content of the fresh air after the fresh air is subjected to heat exchange by the total heat exchanger;
and when the fresh air moisture content is larger than the preset air moisture content, starting the dehumidifying device.
In an embodiment, after the opening the dehumidifying device, the method further includes:
and when the fresh air moisture content is smaller than or equal to the preset air moisture content, closing the dehumidifying device.
In an embodiment, the control method further includes:
when the fresh air equipment operates in a dehumidification reheating mode, the compressor and the switch valve are closed, so that the heat exchange system operates in a heat pipe circulation mode;
And after a preset time interval, executing the step of acquiring the first air moisture content of the fresh air duct before passing through the total heat exchanger and the second air moisture content of the exhaust air duct before passing through the total heat exchanger.
In one embodiment, the step of obtaining a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger comprises:
acquiring a first air temperature and a first air humidity of the fresh air duct before passing through the total heat exchanger, and a second air temperature and a second air humidity of the exhaust air duct before passing through the total heat exchanger;
searching a preset psychrometric chart according to the first air temperature and the first air humidity to obtain the first air moisture content; and
and searching the preset enthalpic humidity map according to the second air temperature and the second air humidity to obtain the second air moisture content.
In addition, in order to achieve the above object, the present invention also provides a control device for a fresh air device, the fresh air device includes a heat exchange system, a fresh air duct, an exhaust air duct and a total heat exchanger, the air in the fresh air duct and the air in the exhaust air duct exchange heat at the total heat exchanger, the heat exchange system is used for cooling the air in the exhaust air duct, the control device includes:
The detection module is used for acquiring the first air moisture content of the fresh air duct before passing through the total heat exchanger and the second air moisture content of the exhaust air duct before passing through the total heat exchanger;
the calculating module is used for obtaining a first difference value between the first air moisture content and the second air moisture content;
and the control module is used for controlling the heat exchange system to operate in a heat pump cycle mode when the first difference value is smaller than a preset threshold value.
In addition, in order to achieve the above object, the present invention also provides a fresh air device including: the control method comprises the steps of a memory, a processor and a control program of fresh air equipment, wherein the control program of the fresh air equipment is stored in the memory and can run on the processor, and the control method of the fresh air equipment is realized when the control program of the fresh air equipment is executed by the processor.
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, which when executed by a processor, implements the steps of the above-described control method of the fresh air device.
The embodiment of the application provides a new trend equipment and control method, controlling means, storage medium's technical scheme thereof has following technical effect or advantage at least:
The fresh air equipment comprises a heat exchange system, a fresh air channel, an exhaust air channel and a total heat exchanger, wherein a fresh air fan is arranged in the fresh air channel, an exhaust fan is arranged in the exhaust air channel, air in the fresh air channel and air in the exhaust air channel exchange heat at the total heat exchanger, and the heat exchange system is used for cooling the air in the exhaust air channel. According to the invention, the technical scheme that the first air moisture content of the fresh air duct before passing through the total heat exchanger and the second air moisture content of the exhaust air duct before passing through the total heat exchanger are firstly obtained, then the first difference value between the first air moisture content and the second air moisture content is obtained, and when the first difference value is smaller than the preset threshold value, the heat exchange system is controlled to operate in a heat pump circulation mode is adopted, so that the technical problem that the total heat exchange efficiency of the existing heat recovery fresh air fan is low is solved, the enthalpy difference between exhaust air and fresh air in the total heat exchanger can be improved, the sustainable sensible heat exchange of fresh air equipment is realized, the total heat exchange efficiency of the fresh air equipment is improved, and the energy consumption of the fresh air equipment is reduced.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a system diagram of a heat recovery fresh air dehumidification embodiment of the present invention;
FIG. 3 is a schematic flow chart of a first embodiment of a method for controlling a fresh air device according to the present invention;
FIG. 4 is a schematic flow chart of a second embodiment of a control method of the fresh air device of the present invention;
FIG. 5 is a schematic flow chart of a third embodiment of a control method of the fresh air equipment of the present invention;
FIG. 6 is a functional block diagram of a control device of the fresh air equipment of the present invention.
Reference numerals illustrate:
Figure SMS_1
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order that the above-described aspects may be better understood, 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 structural diagram of a hardware running environment according to an embodiment of the present invention.
It should be noted that fig. 1 may be a schematic structural diagram of a hardware operating environment of the fresh air device.
As shown in fig. 1, the fresh air device may include: a processor 1001, such as a CPU, memory 1005, user interface 1003, network interface 1004, communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further 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 stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the fresh air equipment structure shown in FIG. 1 is not intended to be limiting, and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components.
As shown in fig. 1, a memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a control program of the fresh air device. The operating system is a program for managing and controlling hardware and software resources of the fresh air equipment, a control program of the fresh air equipment and other software or running of the program.
In the fresh air device shown in fig. 1, the user interface 1003 is mainly used for connecting a terminal, and performs data communication with the terminal; the network interface 1004 is mainly used for a background server and is in data communication with the background server; the processor 1001 may be configured to call a control program of the fresh air device stored in the memory 1005.
In this embodiment, the fresh air device includes: a memory 1005, a processor 1001, and a control program of a fresh air device stored in the memory 1005 and operable on the processor, wherein:
when the processor 1001 calls a control program of the fresh air device stored in the memory 1005, the following operations are performed:
acquiring a first air moisture content of an air inlet of a fresh air duct and a second air moisture content of an air inlet of an exhaust air duct;
acquiring a first difference value between the first air moisture content and the second air moisture content;
and when the first difference value is smaller than a preset threshold value, controlling the heat exchange system to operate in a heat pump cycle mode.
The embodiments of the present invention provide embodiments of a method for controlling a fresh air device, and it should be noted that, although a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different sequence from that shown or described herein.
As shown in fig. 2, the fresh air device in the application includes a fresh air duct 113, an air exhaust duct 112 and a total heat exchanger 111, wherein a fresh air fan 109 is arranged in the fresh air duct 113, an air exhaust fan 110 is arranged in the air exhaust duct 112, and air in the fresh air duct 113 and air in the air exhaust duct 112 exchange heat at the total heat exchanger 111. For the sake of easy understanding of the present application, the air in the fresh air duct 113 is referred to as fresh air, the air in the exhaust air duct 112 is exhausted, the fresh air is introduced into the fresh air duct 113 from the outdoor environment by the fresh air fan 109, and the exhausted air is introduced into the exhaust air duct 112 from the indoor environment by the exhaust fan 110. For example, when the fresh air device is in refrigeration operation in summer, the air exhaust enters the air exhaust duct 112 from the air inlet Pin of the air exhaust duct 112 from the indoor environment, then enters the total heat exchanger 111, the fresh air enters the fresh air duct 113 from the air inlet Xin of the fresh air duct 113 from the outdoor environment, then enters the total heat exchanger 111, after the fresh air and the air exhaust are subjected to heat exchange through the total heat exchanger 111, the fresh air obtains cold from the air exhaust, so that the temperature of the fresh air is reduced, after the temperature of the fresh air is reduced, the dew point temperature of the vapor in the fresh air is reduced, the vapor in the fresh air is liquefied into water drops, and therefore dehumidification of the fresh air is realized, namely, the fresh air is exhausted and cooled, and meanwhile, the fresh air is exhausted and dried; the exhaust air obtains heat from the fresh air, so that the temperature of the exhaust air is increased. Further, the cooled and dehumidified fresh air flows to the indoor environment through the fresh air duct 113, and the exhaust air with raised temperature flows to the outdoor environment through the exhaust air duct 112.
As shown in fig. 3, in a first embodiment of the present application, a control method of a fresh air device of the present application includes the following steps:
step 210: and acquiring a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger.
Step 220: a first difference between the first air moisture content and the second air moisture content is obtained.
Because the total heat exchange efficiency of the fresh air equipment is greatly influenced by the outdoor environment temperature and the indoor environment temperature, when the fresh air equipment refrigerates under the conditions of low temperature and high humidity in summer, if the outdoor environment temperature is lower than the indoor environment temperature, the fresh air equipment cannot perform sensible heat exchange, and cooling and dehumidification of fresh air cannot be realized through air exhaust. Based on this, new trend equipment of this application still includes: and a heat exchange system for adjusting the temperature of the air in the exhaust duct 112.
In this embodiment, the first air moisture content of the fresh air duct 113 before passing through the total heat exchanger 111 may be understood as the moisture content of the fresh air that does not enter the total heat exchanger 111, and the second air moisture content of the exhaust air duct 112 before passing through the total heat exchanger 111 may be understood as the moisture content of the exhaust air that does not enter the total heat exchanger 111. In fig. 2, xin represents the air inlet of the fresh air duct 113, pin represents the air inlet of the air exhaust duct 112, the first air moisture content of the fresh air duct 113 before passing through the total heat exchanger 111 may be the air moisture content of the fresh air at the air inlet Xin, or may be the air moisture content of the fresh air not entering the air inlet Xin, and the second air moisture content of the air exhaust duct 112 before passing through the total heat exchanger 111 may be the air moisture content of the exhaust air at the air inlet Pin, or may be the air moisture content of the exhaust air not entering the air inlet Pin.
After the first air moisture content and the second air moisture content are obtained, the first air moisture content and the second air moisture content are subjected to difference to obtain a first difference value. In this embodiment and the following embodiments, the first air moisture content is exemplified by the air moisture content of fresh air at the air inlet Xin, and the second air moisture content is exemplified by the air moisture content of discharged air at the air inlet Pin.
Step 210 specifically includes:
acquiring a first air temperature and a first air humidity of the fresh air duct before passing through the total heat exchanger, and a second air temperature and a second air humidity of the exhaust air duct before passing through the total heat exchanger;
searching a preset psychrometric chart according to the first air temperature and the first air humidity to obtain the first air moisture content; and
and searching the preset enthalpic humidity map according to the second air temperature and the second air humidity to obtain the second air moisture content.
The first air temperature and the first air humidity of the fresh air duct 113 before passing through the total heat exchanger 111 may be the air temperature and the air humidity of the fresh air at the air inlet Xin, or may be the air temperature and the air humidity of the fresh air not entering the air inlet Xin, and the second air temperature and the second air humidity of the exhaust air duct 112 before passing through the total heat exchanger 111 may be the air temperature and the air humidity of the exhaust air at the air inlet Pin, or may be the air temperature and the air humidity of the exhaust air not entering the air inlet Pin.
For example, temperature and humidity sensors are arranged at the positions of the air inlet Pin and the air inlet Xin, and the temperature and humidity of air at the positions of the air inlet Pin and the air inlet Xin can be collected through the temperature and humidity sensors. For convenience of distinguishing, the air temperature and the air humidity at the air inlet Xin are expressed as a first air temperature and a first air humidity, and the first air temperature and the first air humidity are the temperature and the humidity of fresh air at the air inlet Xin; the air temperature and the air humidity at the air inlet Pin are expressed as a second air temperature and a second air humidity, and the second air temperature and the second air humidity are the temperature and the humidity of exhaust air at the air inlet Pin.
In this embodiment, a preset psychrometric chart, i.e., a preset psychrometric chart, is preset. Searching a preset enthalpic humidity map through the first air temperature and the first air humidity, and searching the moisture content corresponding to the first air temperature and the first air humidity, which is called as first air moisture content; and searching a preset enthalpic humidity map through the second air temperature and the second air humidity, and searching the moisture content corresponding to the second air temperature and the second air humidity, which is called second air moisture content. For example, the first air temperature tj=30 ℃, the first air humidity Φj=67.11%rh, the preset psychrometric chart is searched for to obtain the first air moisture content dj=18 g/kg, the second air temperature tp=28 ℃, the second air humidity Φp=67.18%rh, and the preset psychrometric chart is searched for to obtain the second air moisture content dp=16 g/kg.
Step 230: and when the first difference value is smaller than a preset threshold value, controlling the heat exchange system to operate in a heat pump cycle mode.
In this embodiment, the preset threshold is a set value, denoted as D, and D is specifically a certain range or a certain value between 0 and 15 g/kg. After the first difference value is obtained, the first difference value is compared with a preset threshold value, so that whether the total heat exchange efficiency of the fresh air equipment is low or not is judged through the comparison result, if the first difference value is smaller than the preset threshold value, the total heat exchange efficiency of the fresh air equipment is low, the total heat exchange efficiency needs to be improved, furthermore, the heat exchange system is controlled to operate in a heat pump circulation mode, when the heat exchange system operates in the heat pump circulation mode, after the exhaust air enters the exhaust air duct 112, the heat exchange system cools the exhaust air, the temperature of the exhaust air is further lowered, after the heat exchange system cools the exhaust air, the temperature of the exhaust air is lower than the temperature of fresh air, when the cooled exhaust air enters the total heat exchanger 111, and the total heat exchanger 111 exchanges heat with the cooled exhaust air. Wherein, the enthalpy difference between the exhaust air and the fresh air in the total heat exchanger 111 can be improved by cooling and dehumidifying the exhaust air through the heat exchange system. Because the temperature of airing exhaust after the cooling is less than the temperature of new trend, the temperature of airing exhaust after the cooling can cool down and dehumidify the new trend, and the temperature and the humidity of new trend all reduce, so make new trend equipment can be sustainable carry out the sensible heat exchange, be favorable to improving new trend equipment's total heat exchange efficiency, reduced new trend equipment's energy consumption. If the humidity of the exhaust air is high, the heat exchange system can dehumidify the exhaust air.
As shown in fig. 2, the heat exchange system includes a compressor 101, a first heat exchange portion 105, a throttling component 106, and a second heat exchange portion 107, where the first heat exchange portion 105 and the second heat exchange portion 107 are heat pipe heat exchangers, the compressor 101, the first heat exchange portion 105, the throttling component 106, and the second heat exchange portion 107 are sequentially communicated to form a refrigerant circulation loop, and the second heat exchange portion 107 is disposed in an exhaust air duct 112. The second air moisture content of the exhaust air duct 112 before passing through the total heat exchanger 111 may be the air moisture content of the exhaust air before passing through the second heat exchanger 107, that is, the air moisture content of the exhaust air before passing through the total heat exchanger 111 may be the second air moisture content, that is, the air moisture content of the exhaust air before passing through the second heat exchanger 107 may be the second air moisture content, and the second air temperature and the second air humidity of the exhaust air duct 112 before passing through the total heat exchanger 111 may be the air temperature and the air humidity of the exhaust air before passing through the second heat exchanger 107, that is, the air temperature and the air humidity of the exhaust air before passing through the air inlet Pin, and the second heat exchanger 107 may be the second air temperature and the second air humidity.
Further, the step of controlling the heat exchange system to operate in a heat pump cycle mode includes: the compressor 101 and the throttle member 106 are turned on.
Specifically, when the fresh air equipment refrigerates, the heat exchange system is controlled to operate in a heat pump cycle mode. Wherein controlling the heat exchange system to operate in a heat pump cycle mode refers to turning on the compressor 101 and the restriction member 106. When the heat exchange system operates in a heat pump cycle mode, the refrigerant flow direction is: the refrigerant is discharged from the exhaust port of the compressor 101, enters the first heat exchange portion 105, after passing through the first heat exchange portion 105, the first heat exchange portion 105 can heat the air in the space where the refrigerant is located, after flowing out through the first heat exchange portion 105, the refrigerant enters the second heat exchange portion 107 through the throttling component 106, after passing through the second heat exchange portion 107, the second heat exchange portion 107 cools the air in the space where the refrigerant is located, and then the refrigerant flows out through the second heat exchange portion 107 and flows back to the compressor 101 through the air return port of the compressor 101. The second heat exchange part 107 is arranged in the air exhaust air duct 112, and the air exhaust entering the air exhaust air duct 112 can be cooled by the second heat exchange part 107, so that the temperature of the cooled air exhaust is lower than that of fresh air. After the cooled exhaust air and the fresh air are subjected to heat exchange through the total heat exchanger 111, the temperature and the humidity of the fresh air are reduced, so that the fresh air equipment can continuously perform sensible heat exchange. Since the refrigerant in the heat pump cycle is discharged from the compressor 101, the refrigerant is sufficient, the second heat exchange portion 107 can sufficiently cool and dehumidify the exhaust air, and the second heat exchange portion 107 can improve the enthalpy difference between the exhaust air and the fresh air in the total heat exchanger 111 and reduce the temperature and the humidity of the fresh air entering the total heat exchanger 111 after cooling and dehumidifying the exhaust air, thereby being beneficial to improving the total heat exchange efficiency of the total heat exchanger 111.
The first heat exchange portion 105 is disposed in the fresh air duct 113. After the cooled exhaust air and the fresh air exchange heat through the total heat exchanger 111, the temperature of the cooled fresh air may be lower than the indoor environment temperature, if the cooled fresh air is directly input into the indoor environment, the indoor environment temperature may be reduced on the basis of the indoor environment temperature, so that the user feels cold and the comfort of the user is affected, and in order to keep the comfort of the user, the cooled fresh air needs to be properly warmed, that is, the cooled fresh air temperature needs to be properly raised. When the fresh air device is used for refrigerating, the first heat exchange part 105 can heat the air in the space where the first heat exchange part 105 is located, namely the first heat exchange part 105 can generate heat and heat the air in the space where the first heat exchange part is located through the heat. In order to avoid heat waste, the first heat exchange portion 105 is arranged in the fresh air duct 113, so that the temperature of the cooled fresh air is properly raised by the heat generated by the first heat exchange portion 105, and then the fresh air is input into a room, so that the indoor environment temperature cannot be reduced by the fresh air, and the comfort of a user is maintained.
As shown in fig. 2, in the second embodiment of the present application, the heat exchange system further includes a first branch 114 and a second branch connected in parallel, two ends of the first branch 114 are connected with an input end of the first heat exchange portion 105 and an output end of the second heat exchange portion 107, the second branch includes the switch valve 104 and the compressor 101, an exhaust port of the compressor 101 is connected with the input end of the first heat exchange portion 105, an air return port of the compressor 101 is connected with a first end of the switch valve 104, and a second end of the switch valve 104 is connected with the output end of the second heat exchange portion 107. The on-off valve 104 is a third on-off valve, and the on-off valve 104 is specifically an electromagnetic valve. The on-off valve 104 will be referred to as a third on-off valve 104 in the following.
Specifically, the first branch 114 is provided with a first switch valve 102, a second switch valve 103 is provided between the exhaust port of the compressor 101 and the first end of the first branch 114, a third switch valve 104 is provided between the return port of the compressor 101 and the second end of the first branch 114, the first switch valve 102 is conducted unidirectionally from the second end of the first branch 114 to the first end of the first branch 114, and the second switch valve 103 is conducted unidirectionally from the exhaust port of the compressor 101 to the input end of the first heat exchange portion 105.
After the first switching valve 102 is provided on the first branch 114, the refrigerant can flow out of the exhaust port of the compressor 101, not through the first branch 114, but through the first heat exchange portion 105, the throttling member 106 and the second heat exchange portion 107 in order by controlling the on direction of the first switching valve 102, and after flowing out of the second heat exchange portion 107, the refrigerant passes through the first branch 114, and then through the first heat exchange portion 105, the throttling member 106, the second heat exchange portion 107 and the first branch 114 in order. The circulation circuit in which the refrigerant flows out of the second heat exchange portion 107 and sequentially passes through the first branch 114, the first heat exchange portion 105, the throttle member 106, and the second heat exchange portion 107 is referred to herein as a circuit for heat pipe circulation, i.e., a heat pipe circulation circuit. When the refrigerant is circulated only in the heat pipe circulation circuit, the compressor 101 and the third on-off valve 104 need to be closed.
When the fresh air equipment is used for refrigerating, if the outdoor environment temperature is higher than the indoor environment temperature, the fresh air can be cooled through exhaust, namely, the refrigerant needs to be kept to circulate in the heat pipe circulation loop only. The refrigerant is kept to circulate in the heat pipe circulation loop only, namely, the compressor 101 is closed, the throttling component 106 is opened, the first switch valve 102 is controlled to be conducted unidirectionally from the second end of the first branch 114 to the first end, and the second heat exchange part 107 can cool exhaust air. The second heat exchange portion 107 cools the exhaust air, and the total heat exchanger 111 exchanges heat with the cooled exhaust air and fresh air, and the cooled exhaust air cools and dehumidifies the fresh air. Wherein, through the cooling of the exhaust air of second heat exchange portion 107 to based on the exhaust air after the cooling carries out the cooling and dehumidifies to the new trend, can reduce the load of total heat exchanger 111 to new trend processing, be favorable to saving total heat exchanger 111's energy consumption.
The first switching valve 102 is a one-way valve, and the first switching valve 102 is turned on unidirectionally from the second end of the first branch 114 to the first end of the first branch 114. After the first switch valve 102 is set as the one-way valve, the default first branch 114 is turned on unidirectionally along the second end of the first branch 114 to the first end of the first branch 114, and when the compressor 101 is closed and the throttling component 106 is opened, the first switch valve 102 is controlled to enable the first branch 114 to be turned on unidirectionally along the second end of the first branch to the first end.
When the refrigerant is kept circulating only in the heat pipe circulation circuit, it is necessary to control the second switching valve 103 not to be turned on in the direction of the discharge port of the compressor 101 and the third switching valve 104 not to be turned on in the direction of the return port of the compressor 101. The refrigerant flowing out of the second heat exchange portion 107 does not flow into the pipeline between the return port of the compressor 101 and the first branch 114, but flows into the first branch 114, and further after the refrigerant flowing out of the second heat exchange portion 107 flows through the first branch 114, the refrigerant does not flow into the compressor 101, but flows out of the first branch 114, sequentially passes through the first heat exchange portion 105, the throttling member 106 and the second heat exchange portion 107, and then flows back through the first branch 114, so that the refrigerant circulates only in the heat pipe circulation loop. By arranging the second switch valve 103 and the third switch valve 104, the refrigerant flowing out of the second heat exchange part 107 can be prevented from being shunted into the pipeline between the air return port of the compressor 101 and the first branch 114 and the pipeline between the air exhaust port of the compressor 101 and the first branch 114, so that sufficient refrigerant can be kept in the heat pipe circulation loop, the second heat exchange part 107 can sufficiently cool the exhaust air, the load of the total heat exchanger 111 on fresh air treatment is reduced, and the energy consumption of the total heat exchanger 111 is saved.
The second switching valve 103 is a check valve. After the second switch valve 103 is set as a one-way valve, the default first branch 114 is not conducted to the pipeline between the exhaust ports of the compressor 101, and when the compressor 101 is closed and the throttling component 106 is opened, the second switch valve 103 is controlled, so that the first branch 114 is conducted unidirectionally along the second end thereof to the first end. But it is necessary to turn off the compressor 101 and turn on the throttle member 106 and also turn off the third switch 104, so that a sufficient refrigerant in the heat pipe circulation circuit can be maintained.
As shown in fig. 4, the control method of the fresh air device of the present application further includes:
step 210: and acquiring a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger.
Step 220: a first difference between the first air moisture content and the second air moisture content is obtained.
Step S240: and when the first difference value is greater than or equal to the preset threshold value, closing the compressor and the switch valve so as to enable the heat exchange system to operate in a heat pipe circulation mode.
Specifically, when the heat exchange system is controlled, the heat exchange system can be operated in a heat pump cycle mode or can be operated in a heat pipe cycle mode. That is, if the first difference value is smaller than the preset threshold value, the heat exchange system is controlled to operate in the heat pump cycle mode, and if the first difference value is greater than or equal to the preset threshold value, the total heat exchange efficiency of the fresh air device is restored to be normal, so that the compressor 101 and the third switch valve 104 are closed, and the fresh air fan 109, the exhaust fan 110 and the throttling part 106 are kept open, and the heat exchange system is controlled to operate in the heat pipe cycle mode. After the compressor 101 and the third switch valve 104 are closed, sufficient refrigerant can be kept in the heat pipe circulation loop, so that the second heat exchange part 107 can sufficiently cool exhaust air, the load of the total heat exchanger 111 on fresh air treatment is reduced, and the energy consumption of the total heat exchanger 111 is saved, namely, the energy consumption of fresh air equipment is saved.
As shown in fig. 2, in the third embodiment of the present application, the fresh air device further includes a dehumidifying device 108, where the dehumidifying device 108 is disposed in the fresh air duct 113 and is used for dehumidifying air in the fresh air duct 113, the first heat exchange portion 105 is disposed in the fresh air duct 113, and the dehumidifying device 108 is located between the total heat exchanger 11 and the first heat exchange portion 105. If the outdoor ambient temperature is lower than the indoor ambient temperature, the heat exchange system cools and dehumidifies the exhaust air, and after the cooled exhaust air and the fresh air exchange heat through the total heat exchanger 111, the fresh air is cooled and dehumidified by the cooled exhaust air, and the possible humidity of the cooled and dehumidified fresh air is still relatively high, so that the further re-dehumidification is needed. After the dehumidifying device 108 is arranged in the fresh air duct 113, the dehumidifying device 108 is started to refrigerate, and the dehumidifying device 108 cools and dehumidifies the cooled and dehumidified fresh air in a refrigerating and dehumidifying mode, so that the fresh air is cooled and dried again. After that, the fresh air cooled down and dried again is input into the indoor environment through the fresh air duct 113. The dehumidifying device 108 is internally provided with a cold source capable of continuously circulating, and the cold source is water or a refrigerant, so that the dehumidifying device 108 can always cool and dehumidify fresh air due to the fact that the cold source continuously circulates in the dehumidifying device 108.
The temperature of the fresh air that is cooled down again and dried by the dehumidifying apparatus 108 may be lower, that is, lower than the indoor ambient temperature. If the fresh air after cooling and drying is directly input into the indoor environment, the indoor environment temperature is possibly reduced on the basis of the indoor environment temperature, so that a user feels cold and the comfort of the user is affected, and in order to keep the comfort of the user, the fresh air after cooling and drying is required to be properly warmed, namely the temperature of the fresh air after cooling and drying is properly warmed. When the fresh air device is used for refrigerating, the first heat exchange part 105 can heat the air in the space where the first heat exchange part 105 is located, namely the first heat exchange part 105 can generate heat and heat the air in the space where the first heat exchange part is located through the heat. In order to avoid heat waste, the first heat exchange portion 105 is disposed in the fresh air duct 113, and the dehumidifying device 108 is disposed between the total heat exchanger 11 and the first heat exchange portion 105, so that the fresh air cooled and dried again by the dehumidifying device 108 can be properly warmed by the heat generated by the first heat exchange portion 105, and then the fresh air is input into the room, so that the indoor environment temperature is not reduced by the fresh air, and the comfort of a user is maintained.
As shown in fig. 5, after the step of opening the compressor and the throttle member, further includes:
step S250: and obtaining the fresh air moisture content of the fresh air after heat exchange of the total heat exchanger.
Step S260: and when the fresh air moisture content is larger than the preset air moisture content, starting the dehumidifying device.
Step S270: and when the fresh air moisture content is smaller than or equal to the preset air moisture content, closing the dehumidifying device.
In this embodiment, the fresh air moisture content of the fresh air after heat exchange in the total heat exchanger 111 is also the fresh air moisture content at the air outlet Xout' of the total heat exchanger 111, and this fresh air moisture content is referred to as the third air moisture content. The preset air moisture content is the fresh air moisture content set by the user, the second preset threshold value can be a range value or a fixed value, and if the fresh air moisture content at the air outlet Xout ' is larger than the preset air moisture content, the humidity of the fresh air at the air outlet Xout ' is higher, and the fresh air flowing out of the air outlet Xout ' needs to be dehumidified. Specifically, the temperature and humidity of the fresh air at the air outlet Xout ' of the total heat exchanger are obtained, the obtained temperature and humidity of the fresh air at the air outlet Xout ' are referred to as the third air temperature and the third air humidity, a preset enthalpy and humidity map is searched for through the third air temperature and the third air humidity to obtain a third air humidity content, then the third air humidity content is compared with the preset air humidity content, if the third air humidity content is larger than the preset air humidity content, the opening dehumidification device 108 is started, and the dehumidification device 108 cools and dehumidifies the fresh air flowing out of the air outlet Xout '. And after the dehumidifying device 108 is started, continuously acquiring the third air moisture content, if the third air moisture content is smaller than or equal to the preset air moisture content, which means that the dehumidifying device 108 is not required to dehumidify the fresh air, the fresh air fan 109, the exhaust fan 110 and the throttling component 106 are kept on, and only the dehumidifying device 108 is closed, so that the energy consumption of the fresh air equipment can be further reduced, and the fresh air equipment can be operated in an energy-saving mode.
Further, the control method of the fresh air device further comprises closing the compressor and the switch valve when the fresh air device is operated in a dehumidification reheating mode, so that the heat exchange system is operated in a heat pipe circulation mode, then enabling the fresh air device to work for a preset time interval, and executing step S210 after the preset time interval to obtain a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger.
Specifically, the fresh air equipment has a fresh air dehumidifying and reheating function, and the function is correspondingly provided with a fresh air dehumidifying and reheating mode. The fresh air equipment further comprises a dehumidifying device 108, the dehumidifying device 108 is arranged in the fresh air duct 113 and is used for dehumidifying air in the fresh air duct 113, a default working state of the fresh air equipment in a dehumidifying and reheating mode is preset, the default working state is that the fresh air fan 109, the exhaust fan 110, the throttling component 106 and the dehumidifying device 108 are started, the compressor 101 and the third switch valve 104 are closed, that is, when the fresh air equipment is in the dehumidifying and reheating mode, the heat exchange system is operated in a heat pipe circulation mode, and therefore refrigerant circulates in a heat pipe circulation loop, and the load of the total heat exchanger 111 on fresh air treatment is reduced. Specifically, it is detected that the user sets the fresh air equipment to be in the dehumidification reheat mode, and the fresh air equipment operates in the dehumidification reheat mode, that is, the fresh air fan 109, the exhaust fan 110, the throttle component 106 and the dehumidification device 108 are turned on, the compressor 101 and the third switch valve 104 are turned off, so that the refrigerant can be kept circulating in the heat pipe circulation loop, the exhaust air is cooled and dehumidified through the second heat exchange portion 107 in the heat pipe circulation loop, the enthalpy difference of the exhaust air and the fresh air in the total heat exchanger 111 can be improved, and the temperature and the humidity of the fresh air entering the total heat exchanger 111 are reduced, thereby being beneficial to improving the total heat exchange efficiency of the total heat exchanger 111.
As shown in fig. 2, the fresh air device includes a fresh air duct 113, an exhaust air duct 112, a total heat exchanger 11, a heat exchange system, and a dehumidifying apparatus 108 according to the above embodiments.
A fresh air fan 109 is arranged in the fresh air duct 113, an exhaust fan 110 is arranged in the exhaust duct 112, and the air in the fresh air duct 113 and the air in the exhaust duct 112 exchange heat at the total heat exchanger 111. The heat exchange system comprises a compressor 101, a first heat exchange portion 105, a throttling member 106, a second heat exchange portion 107, and a first branch 114 and a second branch connected in parallel. The compressor 101, the first heat exchange portion 105, the throttling component 106 and the second heat exchange portion 107 are sequentially communicated to form a refrigerant circulation loop, the second heat exchange portion 107 is arranged in the exhaust air duct 112, the first heat exchange portion 105 is arranged in the fresh air duct 113, and the dehumidifying device 108 is arranged in the fresh air duct 113 and is located between the total heat exchanger 11 and the first heat exchange portion 105. The two ends of the first branch 114 are respectively connected with the input end of the first heat exchange portion 105 and the output end of the second heat exchange portion 107, the second branch comprises a switch valve 104 and a compressor 101, an exhaust port of the compressor 101 is connected with the input end of the first heat exchange portion 105, a return port of the compressor 101 is connected with the first end of the switch valve 104, and the second end of the switch valve 104 is connected with the output end of the second heat exchange portion 107. The on-off valve 104 is a third on-off valve, and the on-off valve 104 is specifically an electromagnetic valve. The on-off valve 104 will be referred to as a third on-off valve 104 in the following.
The first branch 114 is provided with a first switch valve 102, a second switch valve 103 is arranged between the exhaust port of the compressor 101 and the first end of the first branch 114, a third switch valve 104 is arranged between the return port of the compressor 101 and the second end of the first branch 114, the first switch valve 102 is conducted unidirectionally from the second end of the first branch 114 to the first end of the first branch 114, and the second switch valve 103 is conducted unidirectionally from the exhaust port of the compressor 101 to the input end of the first heat exchange part 105. The first heat exchange portion 105 and the second heat exchange portion 107 are heat pipe heat exchangers, specifically, the first heat exchange portion 105 is a heat pipe evaporator, and the second heat exchange portion 107 is a heat pipe condenser.
After the fresh air equipment runs in the dehumidification reheating mode, the fresh air equipment defaults to turn on the fresh air fan 109, the exhaust fan 110, the throttling part 106 and the dehumidification device 108, and closes the compressor 101 and the third switch valve 104, so that the refrigerant flowing out of the second heat exchange part 107 circulates in a heat pipe circulation loop formed by the second heat exchange part 107, the first branch 114, the first heat exchange part 105 and the throttling part 106, and the exhausted air is cooled and dehumidified. After a preset time interval, the first air temperature and the first air humidity at the air inlet Xin and the second air temperature and the second air humidity at the air inlet Pin are detected through a temperature and humidity sensor respectively, a preset enthalpy and humidity diagram is searched through the first air temperature and the first air humidity and the second air temperature and the second air humidity, the first air moisture content and the second air moisture content are obtained respectively, then a first difference value of the first air moisture content and the second air moisture content is calculated, if the first difference value is smaller than a preset threshold value, the heat exchange system is controlled to operate in a heat pump circulation mode, namely, the compressor 101 and the throttling part 106 are started, and after the compressor 101 and the throttling part 106 are started, a refrigerant flowing out from an exhaust port of the compressor 101 circulates in a circulating refrigerant loop formed by sequentially communicating the compressor 101, the first heat exchange part 105, the throttling part 106 and the second heat exchange part 107. If the first difference is greater than or equal to the preset threshold, the fresh air fan 109, the exhaust fan 110, the throttling part 106 and the dehumidifying device 108 are kept on, and the compressor 101 and the third switching valve 104 are kept off, so that the heat exchange system operates in a heat pipe circulation mode.
In one example, assuming that D is set to 8g/kg, the user turns on the fresh air device, and the fresh air fan 109, the exhaust fan 110, the throttle member 106, and the dehumidifying device 108 are turned on, and the compressor 101 and the third on-off valve 104 are turned off. The first air temperature tj=30 ℃ acquired by the temperature and humidity sensor, the first air humidity Φj=67.11%rh, the preset enthalpy and humidity diagram is searched for to obtain the first air moisture content dj=18 g/kg, the second air temperature tp=28 ℃, the second air humidity Φp=67.18%rh, the preset enthalpy and humidity diagram is searched for to obtain the second air moisture content dp=16 g/kg, and at the moment, dj-dp=2 < D, the total heat exchange efficiency of the total heat exchanger 111 is judged to be low, the compressor 101 and the third switching valve 104 are started on the basis that the fresh air blower 109, the exhaust fan 110, the throttling component 106 and the dehumidifying device 108 are started, and then the refrigerant circulates in the heat pump circulation loop after the compressor 101 and the third switching valve 104 are started. Since the refrigerant in the heat pump circulation loop is discharged by the compressor 101, the refrigerant is sufficient, the second heat exchange part 107 can sufficiently cool and dehumidify the exhaust air, the second air temperature is reduced to 12 ℃ after the second heat exchange part 107 cools and dehumidifies the exhaust air, the second air moisture content is reduced to 10g/kg, the enthalpy difference between the exhaust air and fresh air in the total heat exchanger 111 can be improved through the second heat exchange part 107 for cooling and dehumidifying the exhaust air, and the fresh air temperature and humidity entering the total heat exchanger 111 are reduced, so that the total heat exchange efficiency of the total heat exchanger 111 is improved.
After the fresh air and the exhausted air are subjected to heat exchange through the total heat exchanger 111, the first air temperature of the fresh air is reduced to 18 ℃, the moisture content of the first air is reduced to 12.4g/kg, the fresh air subjected to cooling and dehumidification again through the dehumidification device 108 is reduced to 10 ℃ again, and the moisture content of the first air is reduced to 8g/kg again. Fresh air cooled and dehumidified again by the dehumidifier 108 is reheated and heated to 25 ℃ by the first heat exchange part 105 and then sent into a room, so that proper temperature rise of the fresh air is realized, and the influence on user comfort caused by the fact that the indoor environment temperature is reduced due to too low fresh air temperature after the dehumidifier 108 is cooled and dehumidified again is avoided. In this embodiment, by opening the heat pump circulation loop, the temperature and humidity of the fresh air before the dehumidifier 108 are reduced, that is, the temperature and humidity of the fresh air entering the total heat exchanger 111 are reduced, the load of the total heat exchanger 111 on fresh air treatment is reduced, the energy consumption of the total heat exchanger 111 is reduced, and compared with the traditional total heat exchanger, the energy is saved.
Further, after the compressor 101 and the third switch valve 104 are turned on again on the basis of the opening of the fresh air fan 109, the exhaust fan 110, the throttling part 106, and the dehumidifying device 108, the air temperature and the air humidity at the air inlet Xin are continuously obtained, and the air temperature and the air humidity at the air inlet Pin are continuously obtained.
The air temperature and the air humidity at the continuously acquired air inlet Xin are represented as a third air temperature and a third air humidity, the air temperature and the air humidity at the continuously acquired air inlet Pin are represented as a fourth air temperature and a fourth air humidity, a preset enthalpy-humidity diagram is searched through the third air temperature and the third air humidity to obtain a third air humidity content, the preset enthalpy-humidity diagram is searched through the fourth air temperature and the fourth air humidity to obtain a fourth air humidity content, if the second difference value between the third air humidity content and the fourth air humidity is larger than or equal to a preset threshold value, the compressor 101 and the third switch valve 104 are closed, the fresh air fan 109, the exhaust fan 110, the throttling part 106 and the dehumidifying device 108 are kept open, so that the refrigerant can be kept circulating in the heat pipe circulation loop, the enthalpy difference between the exhaust air in the total heat exchanger 111 and fresh air can be improved through the second heat exchange part 107 in the heat pipe circulation loop for cooling and dehumidifying, and the temperature and humidity of the fresh air entering the total heat exchanger 111 can be reduced, and the total heat exchange efficiency of the total heat exchanger 111 can be improved.
Further, after the total heat exchange efficiency of the total heat exchanger 111 is recovered to be normal or when the total heat exchange efficiency of the total heat exchanger 111 is in a normal state, the air temperature and the air humidity of the fresh air channel flowing from the total heat exchanger 111 are obtained, that is, the air temperature and the air humidity of the air outlet Xout' of the total heat exchanger 111 are expressed as a fifth air temperature and a fifth air humidity, a preset enthalpy and humidity map is searched for through the fifth air temperature and the fifth air humidity to obtain a fifth air humidity, then the fifth air humidity is compared with the preset air humidity, the fifth air humidity is smaller than the preset air humidity, which means that the dehumidifying device 108 is not required to dehumidify the fresh air, the opening of the fresh air fan 109, the opening of the exhaust fan 110 and the throttling component 106 are kept, and only the dehumidifying device 108 is closed, so that the energy consumption of the fresh air equipment can be further reduced, and the fresh air equipment can be operated in an energy-saving mode. The preset air moisture content is fresh air moisture content set by a user, and the second preset threshold value can be a range value or a fixed value.
As shown in fig. 2 and 6, the present invention further provides a control device for a fresh air device, where the fresh air device includes a heat exchange system, a fresh air duct 113, an exhaust air duct 112, and a total heat exchanger 111, air in the fresh air duct 113 exchanges heat with air in the exhaust air duct 112 at the total heat exchanger 111, and the heat exchange system is used for cooling air in the exhaust air duct 112, and the control device includes:
the detection module 300 is configured to obtain a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger;
a calculating module 310, configured to obtain a first difference between the first air moisture content and the second air moisture content;
and the control module 320 is configured to control the heat exchange system to operate in a heat pump cycle mode when the first difference is less than a preset threshold.
The specific implementation of the control device of the fresh air equipment is basically the same as the embodiments of the control method of the fresh air equipment, and is not repeated here.
Further, the invention also provides fresh air equipment comprising: the control method comprises the steps of a memory, a processor and a control program of fresh air equipment, wherein the control program of the fresh air equipment is stored in the memory and can run on the processor, and the control method of the fresh air equipment is realized when the control program of the fresh air equipment is executed by the processor.
Furthermore, the invention also provides a storage medium, on which a control program of the fresh air equipment is stored, and the control program of the fresh air equipment realizes the steps of the control method of the fresh air equipment when being executed by a processor.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 may 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 use of the words first, second, third, etc. do not denote any order. 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. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The control method of the fresh air equipment is characterized in that the fresh air equipment comprises a heat exchange system, a fresh air duct, an exhaust air duct and a total heat exchanger, wherein air in the fresh air duct and air in the exhaust air duct are subjected to heat exchange at the total heat exchanger, the heat exchange system is used for cooling the air in the exhaust air duct, the heat exchange system comprises a compressor, a first heat exchange part, a throttling part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are heat pipe heat exchangers; the compressor, the first heat exchange part, the throttling part and the second heat exchange part are sequentially communicated to form a refrigerant circulation loop, and the second heat exchange part is arranged between the air inlet of the exhaust air duct and the total heat exchanger; the heat exchange system further comprises a first branch and a second branch which are connected in parallel, wherein two ends of the first branch are respectively connected with the input end of the first heat exchange part and the output end of the second heat exchange part, the second branch comprises a switch valve and a compressor, an exhaust port of the compressor is connected with the input end of the first heat exchange part, an air return port of the compressor is connected with the first end of the switch valve, and the second end of the switch valve is connected with the output end of the second heat exchange part, and the control method comprises the following steps:
Acquiring a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger, wherein the first air moisture content is determined by a first air temperature and a first air humidity, and the second air moisture content is determined by a second air temperature and a second air humidity;
acquiring a first difference value between the first air moisture content and the second air moisture content;
when the first difference value is smaller than a preset threshold value, starting the compressor and the throttling component to enable the heat exchange system to operate in a heat pump cycle mode;
and when the first difference value is greater than or equal to the preset threshold value, closing the compressor and the switch valve so as to enable the heat exchange system to operate in a heat pipe circulation mode.
2. The method of claim 1, wherein the fresh air device further comprises a dehumidifying device disposed within the fresh air duct for dehumidifying air within the fresh air duct, wherein the first heat exchange portion is disposed within the fresh air duct, wherein the dehumidifying device is located between the total heat exchanger and the first heat exchange portion, and wherein after the step of opening the compressor and the throttling component, further comprises:
Acquiring the moisture content of the fresh air after the fresh air is subjected to heat exchange by the total heat exchanger;
and when the fresh air moisture content is larger than the preset air moisture content, starting the dehumidifying device.
3. The method of claim 2, wherein after said turning on said dehumidifying means, further comprising:
and when the fresh air moisture content is smaller than or equal to the preset air moisture content, closing the dehumidifying device.
4. The method of claim 1, wherein the control method further comprises:
when the fresh air equipment operates in a dehumidification reheating mode, the compressor and the switch valve are closed, so that the heat exchange system operates in a heat pipe circulation mode;
and after a preset time interval, executing the step of acquiring the first air moisture content of the fresh air duct before passing through the total heat exchanger and the second air moisture content of the exhaust air duct before passing through the total heat exchanger.
5. The method of claim 1, wherein the step of obtaining a first air moisture content of the fresh air duct prior to passing through the total heat exchanger and a second air moisture content of the exhaust air duct prior to passing through the total heat exchanger comprises:
Acquiring a first air temperature and a first air humidity of the fresh air duct before passing through the total heat exchanger, and a second air temperature and a second air humidity of the exhaust air duct before passing through the total heat exchanger;
searching a preset psychrometric chart according to the first air temperature and the first air humidity to obtain the first air moisture content; and
and searching the preset enthalpic humidity map according to the second air temperature and the second air humidity to obtain the second air moisture content.
6. The control device of the fresh air equipment is characterized by comprising a heat exchange system, a fresh air duct, an air exhaust duct and a total heat exchanger, wherein air in the fresh air duct and air in the air exhaust duct are subjected to heat exchange at the total heat exchanger, the heat exchange system is used for cooling the air in the air exhaust duct, the heat exchange system comprises a compressor, a first heat exchange part, a throttling part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are heat pipe heat exchangers; the compressor, the first heat exchange part, the throttling part and the second heat exchange part are sequentially communicated to form a refrigerant circulation loop, and the second heat exchange part is arranged between the air inlet of the exhaust air duct and the total heat exchanger; the heat exchange system also comprises a first branch and a second branch which are connected in parallel, wherein two ends of the first branch are respectively connected with the input end of the first heat exchange part and the output end of the second heat exchange part, the second branch comprises a switch valve and a compressor, an exhaust port of the compressor is connected with the input end of the first heat exchange part, an air return port of the compressor is connected with the first end of the switch valve, the second end of the switch valve is connected with the output end of the second heat exchange part, and the control device comprises:
The detection module is used for acquiring a first air moisture content of the fresh air duct before passing through the total heat exchanger and a second air moisture content of the exhaust air duct before passing through the total heat exchanger, wherein the first air moisture content is determined by a first air temperature and a first air humidity, and the second air moisture content is determined by a second air temperature and a second air humidity;
the calculating module is used for obtaining a first difference value between the first air moisture content and the second air moisture content;
the control module is used for starting the compressor and the throttling component when the first difference value is smaller than a preset threshold value so that the heat exchange system can operate in a heat pump cycle mode; and when the first difference value is greater than or equal to the preset threshold value, closing the compressor and the switch valve so as to enable the heat exchange system to operate in a heat pipe circulation mode.
7. A fresh air device, comprising: a memory, a processor and a control program of a fresh air device stored on the memory and operable on the processor, which when executed by the processor, implements the steps of the control method of a fresh air device according to any one of claims 1 to 5.
8. A storage medium, characterized in that a control program of a fresh air device is stored thereon, which when executed by a processor realizes the steps of the control method of a fresh air device according to any one of claims 1-5.
CN202111427225.1A 2021-11-24 2021-11-24 Fresh air equipment, control method and device thereof and storage medium Active CN114110984B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715364A (en) * 2019-10-14 2020-01-21 珠海格力电器股份有限公司 Air treatment equipment and control method and device thereof
CN212299347U (en) * 2020-03-09 2021-01-05 青岛海信日立空调系统有限公司 Total heat exchanger

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008309364A (en) * 2007-06-12 2008-12-25 Toyo Eng Works Ltd Heat pump type air conditioning device
JP5219624B2 (en) * 2008-05-26 2013-06-26 三菱電機株式会社 Heat recovery equipment
CN102538084A (en) * 2010-12-15 2012-07-04 广州科力新能源有限公司 Temperature and humidity control method for shipbuilding coating workshop and energy comprehensive utilization system thereof
CN103256666A (en) * 2013-05-15 2013-08-21 天津中德职业技术学院 Independent primary air system provided with heat pipe exchanger and working method thereof
CN203364317U (en) * 2013-07-31 2013-12-25 北京德能恒信科技有限公司 Heat pipe and air conditioner integrated machine
CN107270502A (en) * 2014-04-08 2017-10-20 江苏紫东建筑科技股份有限公司 The secondary recuperation of heat Fresh air handing device and its method of work of central air conditioner system
JP6541790B2 (en) * 2015-08-31 2019-07-10 三菱電機株式会社 Ventilation system
CN107339763A (en) * 2017-06-27 2017-11-10 苏州诚品家智能科技有限公司 Fresh air ventilator
WO2020003446A1 (en) * 2018-06-28 2020-01-02 三菱電機株式会社 Air conditioning device
CN111306646B (en) * 2020-03-04 2021-06-01 珠海格力电器股份有限公司 Control method of fresh air conditioner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715364A (en) * 2019-10-14 2020-01-21 珠海格力电器股份有限公司 Air treatment equipment and control method and device thereof
CN212299347U (en) * 2020-03-09 2021-01-05 青岛海信日立空调系统有限公司 Total heat exchanger

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