CN113932382A - Air conditioner and air conditioner room size identification method - Google Patents

Air conditioner and air conditioner room size identification method Download PDF

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Publication number
CN113932382A
CN113932382A CN202010670562.2A CN202010670562A CN113932382A CN 113932382 A CN113932382 A CN 113932382A CN 202010670562 A CN202010670562 A CN 202010670562A CN 113932382 A CN113932382 A CN 113932382A
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concentration
moment
air conditioner
room
preset
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CN113932382B (en
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李本卫
张永良
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses an air conditioner and a method for identifying the size of a room of the air conditioner, which are applied to a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor and CO2In air conditioners of sensors and controllers, CO2Sensor for obtaining initial CO2Concentration and plateau CO2Concentration; a controller for determining a start point of a plateau region and based on the initial CO2Concentration, plateau CO2The concentration and preset room calculation formula determine the room volume. By the air conditioner and the air conditioner room size identification method, the size of the air conditioner room is determined quickly, the air conditioner is intelligently controlled based on the room size, and user experience is improved.

Description

Air conditioner and air conditioner room size identification method
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner and an air conditioner room size identification method.
Background
In recent years, with the higher and higher requirements on indoor air quality, the fresh air conditioner is more and more popular. Fresh air is exchanged from the outdoor through a fresh air motor and a fresh air duct, the indoor CO2 concentration value is reduced, and a user has good breathing experience.
However, in the prior art, the size of an air-conditioning room cannot be identified, and the accurate identification of the size of the air-conditioning room cannot be performed, so that the accurate output of the refrigerating capacity and the heating capacity according to the size of the room cannot be realized, if the output is too much, waste is generated on one hand, and on the other hand, a user feels too cold or too hot; if the output is too small, the user feels uncomfortable.
Therefore, how to accurately identify the size of the air-conditioning room and then intelligently adjust the air conditioner based on the size of the air-conditioning room is a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention provides an air conditioner, which is used for solving the technical problem that the size of an air-conditioning room cannot be identified in the prior art and comprises the following steps:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
the indoor coil temperature sensor is used for detecting the temperature of the indoor coil;
CO2sensor for obtaining initial CO2Concentration and plateau CO2Concentration;
a controller for determining a starting point of a plateau region and based on the initial CO2Concentration, plateau CO2Determining the room volume by using the concentration and a preset room calculation formula;
the starting point of the stable region is determined based on preset sampling time and a preset threshold, the preset threshold comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold;
the preset room calculation formula is based on CO exhaled by the human body2Content and CO displaced by air conditioner2And (4) determining the content.
In some embodiments, the controller is specifically configured to:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at said first moment2Concentration and CO at the second time2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration of the seventh moment based on preset sampling time, and when the difference between the concentration of the sixth moment and the concentration of the seventh moment is greater than a first threshold value, continuously acquiring the CO of the next moment based on the preset sampling time2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
In some embodiments, the body exhales CO2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
In some embodiments, the air conditioner replaces the replaced CO2The content is determined by the following formula：
Air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
In some embodiments, the preset room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is initial CO2Concentration, V is the room volume.
Correspondingly, the invention also provides an air-conditioning room size measuring method, which comprises the following steps:
determining CO based on a preset sampling time and a preset threshold2The preset threshold comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold;
obtaining initial CO2Concentration and plateau CO2Concentration;
based on the initial CO2Concentration, plateau CO2Determining room volume based on concentration and a predetermined room calculation formula based on CO exhaled by a human body2Content and CO displaced by air conditioner2And (4) determining the content.
In some embodiments, the CO is determined based on a preset sampling time and a preset threshold2The starting point of the concentration stable region is specifically as follows:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at said first moment2Concentration and CO at the second time2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration of the seventh moment based on preset sampling time, and when the difference between the concentration of the sixth moment and the concentration of the seventh moment is greater than a first threshold value, continuously acquiring the CO of the next moment based on the preset sampling time2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
In some embodiments, the body exhales CO2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
In some embodiments, the air conditioner replaces the replaced CO2The content is determined by the following formula:
air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
In some embodiments, the preset room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is initial CO2Concentration, V is the room volume.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an air conditioner and a room size identification thereofThe method is applied to a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor and CO2In air conditioners of sensors and controllers, CO2Sensor for obtaining initial CO2Concentration and plateau CO2Concentration; a controller for determining a starting point of a plateau region and based on the initial CO2Concentration, plateau CO2The concentration and preset room calculation formula determine the room volume. By the air conditioner and the air conditioner room size identification method, the size of the air conditioner room is determined quickly, the air conditioner is intelligently controlled based on the room size, and user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a perspective view showing an external appearance of an air conditioner of an embodiment;
fig. 2 is a circuit diagram showing an outline of the structure of the air conditioner of the embodiment;
fig. 3 is a block diagram showing an outline of the configuration of a control system of an air conditioner;
fig. 4 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating an air conditioner room size identification method according to an embodiment of the present invention;
FIG. 6 shows a CO proposed by an embodiment of the present invention2Schematic diagram of concentration change.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
The air conditioner 1 shown in fig. 1 includes: the indoor unit 3 is exemplified by an indoor unit (shown in the figure), and the indoor unit is usually mounted on an indoor wall surface WL or the like. For another example, an indoor cabinet (not shown) is also an indoor unit of the indoor unit.
The outdoor unit 2 is generally installed outdoors and used for heat exchange in an indoor environment. In the illustration of fig. 1, the outdoor unit 2 is indicated by a broken line because the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 with respect to the wall surface WL.
Fig. 2 shows a circuit configuration of an air conditioner 1, and the air conditioner 1 includes a refrigerant circuit 10, and is capable of executing a vapor compression refrigeration cycle by circulating a refrigerant in the refrigerant circuit 10. The indoor unit 3 and the outdoor unit 2 are connected by a connecting pipe 4 to form a refrigerant circuit 10 in which a refrigerant circulates.
Further, as shown in fig. 3, the air conditioner 1 is provided with a control unit 50 for controlling the operation of each component in the air conditioner inside so that each component of the air conditioner 1 operates to realize each predetermined function of the air conditioner. The air conditioner 1 is further provided with a remote controller 5, and the remote controller 5 has a function of communicating with the control unit 50 using, for example, infrared rays or other communication methods. The remote controller 5 is used for various controls of the air conditioner by a user, and interaction between the user and the air conditioner is realized.
To further describe the solution of the present application, fig. 4 is a schematic structural diagram of an air conditioner of the present application.
The application protects an air conditioner, as shown in fig. 4, specifically is:
the refrigerant circulating loop circulates the refrigerant in a loop formed by a compressor, a condenser, an expansion valve, an evaporator, a four-way valve and a pressure reducer.
In a preferred embodiment of the present application, an air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
And the compressor is used for compressing the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser.
In a preferred embodiment of the present application, the compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
An outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates for a condenser and the other operates for an evaporator.
In a preferred embodiment of the present application, the outdoor unit of the air conditioner includes a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and the expansion valve may be provided in either the indoor unit or the outdoor unit.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
The four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the temperature of the indoor coil.
CO2Sensor 101 for obtaining initial CO2Concentration and plateau CO2Concentration;
a controller 102 for determining a start point of a plateau region and based on the initial CO2Concentration, plateau CO2Determining the room volume by using the concentration and a preset room calculation formula;
the starting point of the stable region is determined based on preset sampling time and a preset threshold, the preset threshold comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold;
the preset room calculation formula is based on CO exhaled by the human body2Content and CO displaced by air conditioner2And (4) determining the content.
In the preferred embodiment of the present application, CO is generated because the air conditioner circulates when the air conditioner is just started2Has a large concentration fluctuation, and when sampling is performed at this time, collected CO2The concentration is not accurate, so it is not accurate in this applicationIn the scheme (2), CO needs to be determined2Starting point of plateau region of concentration, CO collected at a time after the starting point of plateau region2The concentration is more accurate, and simultaneously, when the air conditioner is just started, the current CO is obtained2Concentration as an initial concentration, and determining a room volume according to a preset room calculation formula, specifically, the preset room calculation formula is based on CO exhaled by a human body2Content and CO displaced by air conditioner2And (4) determining the content.
In order to accurately determine the starting point of the plateau region, in some embodiments, the controller is specifically configured to:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at said first moment2Concentration and CO at the second time2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration of the seventh moment based on preset sampling time, and when the difference between the concentration of the sixth moment and the concentration of the seventh moment is greater than a first threshold value, continuously acquiring the CO of the next moment based on the preset sampling time2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
In the preferred embodiment of the present application, after the air conditioner is turned on, sampling is performed once every preset sampling time interval, and first, CO at a first time is obtained2Concentration and CO at the second time2Concentration, comparison of CO at the second moment2Concentration and CO at the first moment2Whether the difference in concentration is greater than that ofA threshold value, if greater than the first threshold value, the condition 1 is satisfied, and the concentration at the second moment is greater than the threshold value at the first moment, at which time CO is present2The concentration is in the rising stage, and CO continues to be collected2And (4) concentration.
After the condition 1 is met, continuing to sample, and if CO at a certain sampling moment2The concentration is greater than the concentration at the previous moment and less than the concentration at the next moment, that is, in the scheme of the application, the concentration of CO at the fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2At concentration, it is determined that condition 2 is satisfied and that CO is indicated2The concentration reached a peak and began to decline.
After the condition 2 is met, continuing to sample, and if CO at a certain sampling moment2When the difference between the concentration and the next sampling concentration is greater than a first threshold value, that is, the difference between the concentration at the sixth time and the concentration at the seventh time is greater than the first threshold value, condition 3 is satisfied, and at this time, CO is present2The concentration is in the decline phase.
After the condition 3 is met, continuing to sample, and if CO at a certain sampling moment2The difference between the concentration and the concentration of the next sample is less than a second threshold value, namely CO at the Nth time2Concentration and CO at time N +12The difference in concentration is less than a second threshold value, indicating CO2The concentration change tends to be stable and reaches a stable region, and the time point of N +1 is taken as the initial point of the stable region.
In the time from the starting time to N +1, belonging to the transition region, in the region, APP can prompt the user to' CO2Concentration sampling may be triggered by "waiting slightly" or similar prompts as the air cycle is being filtered, or the display may indicate to the user, CO, in a manner such that the indicator lights flash or a ticker cycle display2The concentration is being calculated, and the sampled value fluctuates at this time.
In addition, it should be noted that, in the plateau region, CO is present2The concentration tends to be stable with little variation, so the second threshold is less than the first threshold.
It should be noted that, the values of the first threshold and the second threshold may be flexibly selected according to actual situations, and the difference between the values does not affect the protection scope of the present application.
In order to accurately acquire CO exhaled by the human body2Content, in a preferred embodiment of the present application, CO exhaled by said human body2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
Specifically, the air conditioner is provided with a millimeter wave sensor, so that the number of people in the air-conditioning room can be monitored through the millimeter wave sensor, and the CO in a stable area can be collected2Concentration, and thus obtaining CO in a plateau region2Determining the CO exhaled by human body based on the data at the moment corresponding to the concentration2And (4) content.
To obtain CO displaced by the air conditioner2Content, in a preferred embodiment of the present application, the air conditioner replaces the CO2The content is determined by the following formula:
air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
In particular, a general outdoor environment CO2The concentration is 400ppm, the air conditioning ventilation per minute is determined according to the air conditioning operation mode, and the air conditioning ventilation per minute is different under different wind speed gears.
In order to determine the room size, in a preferred embodiment of the present application, the preset room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is initial CO2Concentration, V is the room volume.
In particular, the method is used for acquiring the CO exhaled by the human body2Content and CO displaced by air conditioner2After the content, a preset room calculation formula is constructed, and at the moment, CO is2Concentration and CO exhaled by human body2The sum of the contents minus CO displaced by the air conditioner2The concentration is the CO sampled in the stable region2Concentration, the room volume is obtained based on the formula.
The invention discloses an air conditioner, which is applied to a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor and CO2In air conditioners of sensors and controllers, CO2Sensor for obtaining initial CO2Concentration and plateau CO2Concentration; a controller for determining a starting point of a plateau region and based on the initial CO2Concentration, plateau CO2The concentration and preset room calculation formula determine the room volume. By the air conditioner and the air conditioner room size identification method, the size of the air conditioner room is determined quickly, the air conditioner is intelligently controlled based on the room size, and user experience is improved.
Based on the air conditioner, the application also provides an air conditioner room size identification method, as shown in fig. 5, the method is applied to a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor, and CO2In an air conditioner with a sensor and a controller, the method comprises the following steps:
step S201, determining CO based on preset sampling time and preset threshold value2And the preset threshold comprises a first threshold and a second threshold, and the first threshold is greater than the second threshold.
In the preferred embodiment of the present application, CO is generated because the air conditioner circulates when the air conditioner is just started2Has a large concentration fluctuation, and when sampling is performed at this time, collected CO2The concentration is inaccurate, so in the protocol of the present application, the CO needs to be determined2The starting point of the plateau region of concentration.
In order to accurately determine the starting point of the plateau region, in some embodiments, the controller is specifically configured to:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at said first moment2Concentration and CO at the second time2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration of the seventh moment based on preset sampling time, and when the difference between the concentration of the sixth moment and the concentration of the seventh moment is greater than a first threshold value, continuously acquiring the CO of the next moment based on the preset sampling time2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
Specifically, as shown in fig. 6, after the blower is turned on, CO is added2The concentration variation trend is shown in the figure, and what we need to sample is CO behind the cut line2The density, the density change at this time, tends to be stable, so it is necessary to determine the dividing line in fig. 6, i.e., the starting point of the plateau region in the present application.
Here, we can set the preset sampling time to be 30ms, and the specific starting point determination process is as follows:
the first step is as follows: after a new fan or an air conditioner fan is started, sampling CO once every 30ms2Concentration, comparison of CO at time t1 with time t22And if the concentration difference value is C2-C1 and is larger than or equal to delta C0, the condition 1 is met, and the delta C0 is a first threshold value.
The second step is that: after condition 1 is satisfied, the CO is sampled every 30ms2Concentration, comparisonCO at time t3, time t4, and time t52The concentration value satisfies C3 ≤ C4 ≤ C5, and then satisfies condition 2.
The third step: after condition 2 is satisfied, the CO is sampled every 30ms2Concentration, comparison of CO at time t6 with time t72And if the concentration difference is C6-C7 is more than or equal to delta C0, the condition 3 is met.
The fourth step: and after the condition 3 is met, continuously sampling the concentration of CO2 once every 30ms, comparing the concentration difference between the next moment and the previous moment, if Cn-Cn +1 is less than or equal to deltaC 1, the n +1 moment is a dividing line, and deltaC 1 is a second threshold value.
In the time from the starting time to n +1, belonging to the transition region, in the region, APP can prompt the user to' CO2Concentration sampling may be triggered by "waiting slightly" or similar prompts as the air cycle is being filtered, or the display may indicate to the user, CO, in a manner such that the indicator lights flash or a ticker cycle display2The concentration is being calculated, the sampling value at the moment fluctuates, after passing through the dividing line, the APP display and the display screen display are recovered to be normal, and then the people and the CO in the room begin to be calculated2The concentration change identifies the room size.
Step S202, obtaining initial CO2Concentration and plateau CO2And (4) concentration.
Specifically, after determining the starting point of the good plateau region, CO2Sensor acquisition of initial CO just after air conditioner start2Concentration and obtaining CO in a plateau region2And (4) concentration.
Step S203, based on the initial CO2Concentration, plateau CO2Determining room volume based on concentration and a predetermined room calculation formula based on CO exhaled by a human body2Content and CO displaced by air conditioner2And (4) determining the content.
In a preferred embodiment of the present application, the initial CO is obtained after obtaining the initial CO2Concentration, plateau CO2After concentration, the room volume is determined according to a preset room calculation formula, in particular, the preset room calculation formula is based on CO exhaled by the human body2Content and CO displaced by air conditioner2And (4) determining the content.
In order to accurately acquire CO exhaled by the human body2Content, in a preferred embodiment of the present application, CO exhaled by said human body2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
To obtain CO displaced by the air conditioner2Content, in a preferred embodiment of the present application, the air conditioner replaces the CO2The content is determined by the following formula:
air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
Specifically, the fresh air volume of the air conditioner is designed and shaped along with the product, and the corresponding relation of the air volume of the air conditioner is shown in the following table 1:
Figure BDA0002582128840000121
TABLE 1
That is to say, after the super-strong wind speed of the fresh air is started, the fresh air volume of the room can reach 50m & ltPh & gt 3 in 1 hour, and the ventilation volume per minute is 50/6 & ltm & gt 8.33m & ltPh & gt 3.
At this time, the air conditioner replaces the CO2The content can be expressed as CO displaced by the air conditioner2Content ═ C0-400)*8.33*T/V，
In order to determine the room size, in a preferred embodiment of the present application, the preset room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is an initialCO2Concentration, V is the room volume.
Specifically, assuming that the room area is S, the general room height is 2.8m, and the room volume V is S × 2.8. After entering into normal change, the initial CO2At a concentration of C0The number of the room is N, and each person releases CO per minute2The amount was about 0.38, CO detected after 10min2At a concentration of C1Outdoor environment CO2The concentration was 400 ppm. The room size can be calculated as:
CO exhaled by human body2The content is N10 0.38 1000/V
Fresh air replaced CO2Content ═ C0-400)*8.33*10/V
Then room CO after 10min2Concentration C1Comprises the following steps:
C1＝C0+N*10*0.38*1000/V-(C0-400)*8.33*10/V
thus, the room area S and the room volume V are calculated.
According to the room area or the volume, the heat load of the room can be calculated, the frequency output of the air conditioner compressor is convenient to control, the output cold quantity or the heat quantity is more accurately controlled, and a user has more comfortable use experience.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. An air conditioner, comprising:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
the indoor coil temperature sensor is used for detecting the temperature of the indoor coil;
CO2sensor for obtaining initial CO2Concentration and plateau CO2Concentration;
a controller for determining a starting point of a plateau region and based on the initial CO2Concentration, plateau CO2Determining the room volume by using the concentration and a preset room calculation formula;
the starting point of the stable region is determined based on preset sampling time and a preset threshold, the preset threshold comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold;
the preset room calculation formula is based on CO exhaled by the human body2Content and CO displaced by air conditioner2And (4) determining the content.
2. The air conditioner of claim 1, wherein the controller is specifically configured to:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at the second time2Concentration and CO at the first moment2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2The concentration is higher than the thirdTemporal CO2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration of the seventh moment based on preset sampling time, and when the difference between the concentration of the sixth moment and the concentration of the seventh moment is greater than a first threshold value, continuously acquiring the CO of the next moment based on the preset sampling time2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
3. The air conditioner of claim 1, wherein said human exhaled CO2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
4. The air conditioner of claim 1, wherein the air conditioner replaces the replaced CO2The content is determined by the following formula:
air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
5. The air conditioner according to claim 1, wherein the preset room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is initial CO2Concentration, V is the room volume.
6. A method for identifying the size of air-conditioning room features that it is used in the refrigerant circulating loop, compressor, outdoor heat exchanger, indoor heat exchanger, four-way valve, indoor ambient temp sensor, indoor coiled tube temp sensor, CO2In an air conditioner with a sensor and a controller, the method comprises the following steps:
determining CO based on a preset sampling time and a preset threshold2The preset threshold comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold;
obtaining initial CO2Concentration and plateau CO2Concentration;
based on the initial CO2Concentration, plateau CO2Determining room volume based on concentration and a predetermined room calculation formula based on CO exhaled by a human body2Content and CO displaced by air conditioner2And (4) determining the content.
7. The method of claim 6, wherein the CO is determined based on a preset sampling time and a preset threshold2The starting point of the concentration stable region is specifically as follows:
acquiring CO at a first moment based on preset sampling time after the air conditioner is started2Concentration and CO at the second moment2Concentration of CO at said first moment2Concentration and CO at the second time2When the concentration difference is larger than a first threshold value, acquiring CO at a third moment based on preset sampling time2Concentration;
obtaining CO at a fourth moment based on a preset sampling time2Concentration and CO at fifth moment2Concentration of CO at said fourth moment2CO concentration greater than the third moment2CO concentration less than fifth moment2When the concentration is high, the CO at the sixth moment is obtained based on the preset sampling time2Concentration;
acquiring the concentration at the seventh moment based on preset sampling time, and when the difference between the concentration at the sixth moment and the concentration at the seventh moment is greater than a first threshold value, based on presetSampling time to continuously obtain CO at next moment2Concentration of CO until time N2Concentration and CO at time N +12The difference of the concentrations is smaller than a second threshold value, and the (N + 1) th moment is taken as the starting point of the stable region.
8. The method of claim 6, wherein the human body exhales CO2The content is determined by the following formula:
CO exhaled by human body2The content is N T0.38T 1000/V;
wherein N is the number of people in the room, V is the room volume, and T is the CO in the stable region2The time corresponding to the concentration.
9. The method of claim 6, wherein the air conditioner replaces the replaced CO2The content is determined by the following formula:
air conditioner replaced CO2Content ═ C0-400)*V0*T/V；
Wherein, C0Is initial CO2Concentration, T is CO in the plateau2Time corresponding to concentration, V0Air conditioning ventilation per minute, and V is the room volume.
10. The method according to claim 6, wherein the pre-set room calculation formula is specifically:
C1＝C0+N*T*0.38*1000/V-(C0-400)*V0*T/V；
wherein, C1CO being in a plateau2Concentration, C0Is initial CO2Concentration, V is the room volume.
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