CN113932382B - Air conditioner and air conditioning room size identification method - Google Patents

Air conditioner and air conditioning room size identification method Download PDF

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Publication number
CN113932382B
CN113932382B CN202010670562.2A CN202010670562A CN113932382B CN 113932382 B CN113932382 B CN 113932382B CN 202010670562 A CN202010670562 A CN 202010670562A CN 113932382 B CN113932382 B CN 113932382B
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concentration
moment
air conditioner
room
preset
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CN113932382A (en
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李本卫
张永良
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Hisense Air Conditioning Co Ltd
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Hisense 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 application discloses an air conditioner and an air conditioning room size identification method, 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 CO 2 In air conditioner of sensor and controller, CO 2 A sensor for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration; a controller for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 And determining the room volume by using a concentration and preset room calculation formula. By the air conditioner and the air-conditioning room size identification method, the size of the air-conditioning room is rapidly determined, the air conditioner is intelligently controlled based on the room size, and user experience is improved.

Description

Air conditioner and air conditioning 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 conditioning room size identification method.
Background
In recent years, as the requirements on indoor air quality are higher and higher, fresh air conditioners are becoming more and more popular. Fresh air is exchanged from the outdoor through the fresh air motor and the fresh air duct to reduce the concentration value of CO2 in the room, so that a user has a good breathing experience.
However, in the prior art, the size of the air-conditioning room cannot be identified, and the accurate output refrigerating capacity and heating capacity according to the size of the air-conditioning room cannot be obtained because the size of the air-conditioning room cannot be identified, if the output is excessive, waste is generated, and users feel supercooling or overheating; and the output is too little, 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 in the art.
Disclosure of Invention
The application 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:
a refrigerant circulation loop for circulating 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 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;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers works as a condenser and the other heat exchanger works as an 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 a condenser and an evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
an indoor coil temperature sensor for detecting an indoor coil temperature;
CO 2 a sensor for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration;
a controller for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and preset room calculation formula;
the starting point of the stable region is determined based on a preset sampling time and a preset threshold, wherein 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 human body 2 Content and CO replaced by air conditioner 2 And determining the content.
In some embodiments, the controller is specifically configured to:
after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration and atCO at the first moment 2 Concentration and CO at the second moment 2 When the concentration difference is larger than the first threshold value, acquiring CO at a third moment based on a preset sampling time 2 Concentration;
acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration of CO at the fourth moment 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration;
acquiring the concentration at the seventh moment based on the preset sampling time, and continuously acquiring the CO at the next moment based on the preset sampling time when the difference between the concentration at the sixth moment and the concentration at the seventh moment is larger than a first threshold value 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The difference in concentration is less than a second threshold and the n+1 time is taken as the starting point of the plateau.
In some embodiments, the human exhaled CO 2 The content is specifically determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
In some embodiments, the air conditioner replaces the CO 2 The content is specifically determined by the following formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
In some embodiments, the preset room calculation formula is specifically:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 Is of a plateauCO 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
Correspondingly, the application also provides a method for measuring the size of the air-conditioning room, which comprises the following steps:
determining CO based on a preset sampling time and a preset threshold 2 The starting point of the concentration plateau region, wherein the preset threshold value comprises a first threshold value and a second threshold value, and the first threshold value is larger than the second threshold value;
acquisition of initial CO 2 Concentration and plateau of CO 2 Concentration;
based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and a preset room calculation formula, wherein the preset room calculation formula is based on CO exhaled by a human body 2 Content and CO replaced by air conditioner 2 And determining the content.
In some embodiments, the CO is determined based on a preset sampling time and a preset threshold 2 The starting point of the concentration plateau is specifically:
after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration of CO at the first moment 2 Concentration and CO at the second moment 2 When the concentration difference is larger than the first threshold value, acquiring CO at a third moment based on a preset sampling time 2 Concentration;
acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration of CO at the fourth moment 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration;
acquiring the concentration at the seventh moment based on the preset sampling time, and continuously acquiring the CO at the next moment based on the preset sampling time when the difference between the concentration at the sixth moment and the concentration at the seventh moment is larger than a first threshold value 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The difference of the concentrations is smaller than the second threshold value andtime n+1 serves as a starting point for the plateau.
In some embodiments, the human exhaled CO 2 The content is specifically determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
In some embodiments, the air conditioner replaces the CO 2 The content is specifically determined by the following formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
In some embodiments, the preset room calculation formula is specifically:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 CO as plateau 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
Compared with the prior art, the application has the following beneficial effects:
the application discloses an air conditioner and an air conditioning room size identification method, 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 CO 2 In air conditioner of sensor and controller, CO 2 A sensor for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration; a controller for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 And determining the room volume by using a concentration and preset room calculation formula. Through the air conditioner and the air-conditioning room size identification method, the size of an air-conditioning room is rapidly determined, and the size of the air-conditioning room is based on the room sizeThe small intelligent control is carried out on the air conditioner, so that the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
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 a structure of a control system of an air conditioner;
fig. 4 shows a schematic structural diagram of an air conditioner according to an embodiment of the present application;
fig. 5 is a schematic flow chart of a method for identifying the size of an air-conditioning room according to an embodiment of the present application;
FIG. 6 shows a CO according to an embodiment of the present application 2 Concentration change schematic.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The air conditioner of the present application performs a refrigerating 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 a 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 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an 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 function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
The air conditioner 1 shown in fig. 1 includes: the indoor unit 3 is, for example, 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 unit (not shown) is also an indoor unit mode.
The outdoor unit 2 is usually installed outdoors and is used for heat exchange in an indoor environment. In fig. 1, the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 across the wall surface WL, and the outdoor unit 2 is indicated by a broken line.
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 performing 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 to each other by a connection pipe 4 to form a refrigerant circuit 10 through which a refrigerant circulates.
As shown in fig. 3, the air conditioner 1 includes a control unit 50 for controlling operations of the respective components in the air conditioner so that the respective components of the air conditioner 1 operate to realize respective predetermined functions of the air conditioner. A remote controller 5 is attached to the air conditioner 1, and the remote controller 5 has a function of communicating with the control unit 50 using, for example, infrared rays or other communication means. 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.
For further description of the solution of the present application, fig. 4 is a schematic structural diagram of an air conditioner according to the present application.
The application protects an air conditioner, as shown in fig. 4, specifically comprising:
and the refrigerant circulation loop enables the refrigerant to circulate in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer.
In a preferred embodiment of the present application, the air conditioner performs a refrigerating 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 a 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 the 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 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, one of which is operated as a condenser and the other is operated as an evaporator.
In a preferred embodiment of the present application, an outdoor unit of an air conditioner includes a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an 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 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 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of 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 a condenser and an evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the indoor coil temperature.
CO 2 A sensor 101 for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration;
a controller 102 for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and preset room calculation formula;
the starting point of the stable region is determined based on a preset sampling time and a preset threshold, wherein 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 human body 2 Content and CO replaced by air conditioner 2 And determining the content.
In the preferred embodiment of the present application, the air conditioner circulates to cause CO when the air conditioner is just started 2 The concentration fluctuation of (2) is large, and the collected CO is sampled at this time 2 The concentration is inaccurate, so in the scheme of the application, the CO needs to be determined 2 A start point of a plateau of concentration, CO collected at a time after the start point of the plateau 2 The concentration is more accurate, and meanwhile, when the air conditioner is just started, the current CO is obtained 2 The concentration is used as the initial concentration, and the room volume is determined according to a preset room calculation formula, specifically, the preset room calculation formula is based on CO exhaled by a human body 2 Content and CO replaced by air conditioner 2 And determining the content.
To accurately determine the start point of the plateau, in some embodiments, the controller is specifically configured to:
after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration of CO at the first moment 2 Concentration and CO at the second moment 2 When the concentration difference is larger than the first threshold value, acquiring CO at a third moment based on a preset sampling time 2 Concentration;
acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration of CO at the fourth moment 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration;
acquiring the concentration at the seventh moment based on the preset sampling time, and continuously acquiring the CO at the next moment based on the preset sampling time when the difference between the concentration at the sixth moment and the concentration at the seventh moment is larger than a first threshold value 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The difference in concentration is less than a second threshold and the n+1 time is taken as the starting point of the plateau.
In a preferred embodiment of the present application, after the air conditioner is turned on, sampling is performed at intervals of a preset sampling time, and first, CO at a first time is obtained 2 Concentration and CO at the second moment 2 Concentration, CO at the second moment of comparison 2 Concentration and CO at the first moment 2 If the difference in concentration is greater than the first threshold, then condition 1 is satisfied and indicates that the concentration at the second time is greater than the threshold at the first time, at which time CO 2 The concentration is in the rising stage, and the CO is continuously collected at the moment 2 Concentration.
After meeting the condition 1, continuing to sample, if the CO at a certain sampling time is sampled 2 The concentration is higher than that of the previous moment and lower than that of the next moment, namely the CO at the fourth moment in the scheme of the application 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 At the concentration, then it is determined that condition 2 is satisfied and CO is indicated 2 The concentration reaches the peak of the riseAnd starts to descend.
After meeting the condition 2, continuing to sample, if the CO at a certain sampling time is sampled 2 When the difference between the concentration and the next sampling concentration is greater than a first threshold, i.e. the difference between the concentration at the sixth time and the concentration at the seventh time is greater than the first threshold, then condition 3 is satisfied, at which time CO 2 The concentration is in the drop phase.
After meeting the condition 3, continuing sampling, if the CO at a certain sampling moment 2 The difference between the concentration and the next sampled concentration is less than a second threshold, namely CO at the N-th moment 2 Concentration and CO at time n+1 2 The difference in concentration being less than a second threshold value, indicating CO 2 The concentration change tends to stabilize and reaches the plateau, at which time the n+1 time is taken as the initial point of the plateau.
Belonging to the transition zone in the time from the start time to N+1, where APP can prompt the user "CO 2 The concentration sampling is processed and filtered by air circulation, and the concentration sampling is slightly equal or similar, or the display screen can indicate the user by flashing an indicator lamp or circularly displaying a ticker lamp, CO 2 The concentration is being calculated, and the sample value at this time fluctuates.
In addition, since CO is in the plateau region 2 The concentration tends to stabilize and does not change much, so the second threshold is smaller 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 of the values does not affect the protection scope of the present application.
In order to accurately obtain the CO exhaled by the human body 2 Content in the preferred embodiment of the present application, the CO exhaled by the human body 2 The content is specifically determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
Specifically, the millimeter wave sensor is mounted in the air conditioner, and the millimeter wave sensor can be used for detecting the millimeter wave sensorThe millimeter wave sensor monitors the number of people in the air-conditioned room and collects CO in a stable region 2 Concentration and thus obtain CO in the plateau region 2 Determining CO exhaled by human body based on the data at the moment corresponding to the concentration 2 The content is as follows.
To obtain the CO replaced by the air conditioner 2 Content in the preferred embodiment of the present application, the air conditioner replaces CO 2 The content is specifically determined by the following formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
Specifically, the general outdoor environment CO 2 The concentration is 400ppm, the air conditioner ventilation amount per minute is determined according to the air conditioner operation mode, and the air conditioner ventilation amount 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:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 CO as plateau 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
In particular, the CO exhaled by the human body is obtained 2 Content and CO replaced by air conditioner 2 After the content, a preset room calculation formula is constructed, and at the moment, CO 2 Concentration and CO exhaled by human body 2 The sum of the contents minus the CO displaced by the air conditioner 2 The concentration is the CO sampled in the stable region 2 The concentration, based on the formula, obtains the room volume.
The application 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 CO 2 Sensor for detecting a position of a bodyAnd in the air conditioner of the controller, CO 2 A sensor for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration; a controller for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 And determining the room volume by using a concentration and preset room calculation formula. Through the air conditioner and the air-conditioning room size identification method, the size of the air-conditioning room is determined and determined quickly, the air conditioner is intelligently controlled based on the room size, and user experience is improved.
Based on the above air conditioner, the application also provides an air conditioner room size identification method, as shown in FIG. 5, which is applied to a system comprising 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 CO 2 In an air conditioner of a sensor and a controller, the method includes:
step S201, determining CO based on a preset sampling time and a preset threshold 2 The starting point of the concentration plateau region comprises a first threshold and a second threshold, and the first threshold is larger than the second threshold.
In the preferred embodiment of the application, the air conditioner circulates to cause CO when the air conditioner is just started 2 The concentration fluctuation of (2) is large, and the collected CO is sampled at this time 2 The concentration is inaccurate, so in the scheme of the application, the CO needs to be determined 2 The starting point of the plateau of concentration.
To accurately determine the start point of the plateau, in some embodiments, the controller is specifically configured to:
after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration of CO at the first moment 2 Concentration and CO at the second moment 2 When the concentration difference is larger than the first threshold value, acquiring CO at a third moment based on a preset sampling time 2 Concentration;
acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration, andCO at the fourth time 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration;
acquiring the concentration at the seventh moment based on the preset sampling time, and continuously acquiring the CO at the next moment based on the preset sampling time when the difference between the concentration at the sixth moment and the concentration at the seventh moment is larger than a first threshold value 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The difference in concentration is less than a second threshold and the n+1 time is taken as the starting point of the plateau.
Specifically, as shown in FIG. 6, after the fan is turned on, CO 2 As can be seen from the graph, what we need to sample is the CO behind the parting line 2 The density, at which the density variation tends to stabilize, so that it is necessary to determine the parting line in fig. 6, i.e., the starting point of the plateau in the present application.
Here we can set the preset sampling time to 30ms, then the specific starting point determining procedure is:
the first step: after a fresh air blower or an air conditioner blower is started, sampling CO every 30ms 2 Concentration, comparing time t1 with time t2 CO 2 And if the concentration difference value is C2-C1 not less than delta C0, the condition 1 is satisfied, and the delta C0 is a first threshold value.
And a second step of: after condition 1 is satisfied, CO is sampled every 30ms 2 Concentration, CO at times t3, t4 and t5 are compared 2 And the concentration value satisfies C3-C4-C5, and satisfies condition 2.
And a third step of: after condition 2 is satisfied, CO is sampled every 30ms 2 Concentration, comparing time t6 with time t7 CO 2 And if the concentration difference is C6-C7 is more than or equal to delta C0, the condition 3 is satisfied.
Fourth step: after the condition 3 is met, the concentration of CO2 is continuously sampled every 30ms, the concentration difference between the later moment and the previous moment is compared, if Cn-Cn+1 is less than or equal to DeltaC 1, the moment n+1 is a dividing line, and DeltaC 1 is a second threshold value.
In the time from the start time to n+1, belonging to the transition zone,in this interval, APP can prompt the user "CO 2 The concentration sampling is processed and filtered by air circulation, and the concentration sampling is slightly equal or similar, or the display screen can indicate the user by flashing an indicator lamp or circularly displaying a ticker lamp, CO 2 The concentration is being calculated, the sampling value at the moment has fluctuation, after passing through the dividing line, the APP display and the display screen display are restored to be normal, and then the process is started according to the number of people in the room and CO 2 The concentration change identifies the room size.
Step S202, obtaining initial CO 2 Concentration and plateau of CO 2 Concentration.
Specifically, after determining the starting point of the plateau, the CO 2 The sensor collects initial CO when the air conditioner is just started 2 Concentration and obtain CO in plateau region 2 Concentration.
Step S203, based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and a preset room calculation formula, wherein the preset room calculation formula is based on CO exhaled by a human body 2 Content and CO replaced by air conditioner 2 And determining the content.
In a preferred embodiment of the application, the initial CO is obtained 2 Concentration, plateau CO 2 After the concentration, determining the room volume according to a preset room calculation formula, wherein the preset room calculation formula is based on CO exhaled by a human body 2 Content and CO replaced by air conditioner 2 And determining the content.
In order to accurately obtain the CO exhaled by the human body 2 Content in the preferred embodiment of the present application, the CO exhaled by the human body 2 The content is specifically determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
To obtain the CO replaced by the air conditioner 2 Content in the preferred embodiment of the present application, the air conditioner replaces CO 2 The content is specifically disclosed in the following formulaAnd (3) determining the formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
Specifically, the fresh air volume of the air conditioner is designed and shaped along with the product, and the following table 1 shows the corresponding relation of the air volume of a certain air conditioner:
TABLE 1
That is, after the super strong wind speed of the fresh air is started, the fresh air volume of the room reaches 50 mA3 in 1 hour, and the ventilation amount per minute is 50/6=8.33 mA3.
At this time, the air conditioner replaces the CO 2 The content can be expressed as CO replaced by an air conditioner 2 Content= (C 0 -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:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 CO as plateau 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
Specifically, assuming that the room area is S, the room height is typically 2.8m, and the room volume v=s×2.8. After entering into normal change, the CO is initialized 2 Concentration of C 0 The number of people in the room is N, and CO released by each person per minute 2 About 0.38, CO detected after 10min 2 Concentration of C 1 Outdoor environment CO 2 The concentration was 400ppm. The room size can be calculated as:
CO exhaled by human body 2 content=n×10×0.38×1000/V
CO replaced by fresh air 2 Content= (C 0 -400)*8.33*10/V
Room CO after 10min 2 Concentration C 1 The method comprises the following steps:
C 1 ＝C 0 +N*10*0.38*1000/V-(C 0 -400)*8.33*10/V
thus calculated is room area S and room volume V.
According to the room area or volume, the room heat load can be calculated, the frequency output of the air conditioner compressor can be controlled conveniently, the output cold quantity or heat quantity can be controlled more accurately, and a user can have more comfortable use experience.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (6)

1. An air conditioner, comprising:
a refrigerant circulation loop for circulating 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 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;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the two heat exchangers works as a condenser and the other works as an evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant circulation loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between a condenser and an evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
an indoor coil temperature sensor for detecting an indoor coil temperature;
CO 2 a sensor for acquiring initial CO 2 Concentration and plateau of CO 2 Concentration, when the air conditioner is just started, acquiring the current CO 2 Concentration as initial CO 2 Concentration;
a controller for determining a start point of the plateau and based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and preset room calculation formula;
wherein the initial point of the stable region is based on a preset sampling time and a preset CO 2 The concentration threshold value is determined, and the preset CO 2 The concentration threshold includes a first CO 2 Concentration threshold and second CO 2 Concentration threshold, the first CO 2 Concentration threshold is greater than second CO 2 A concentration threshold;
the controller is specifically used for: after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration of CO at the second moment 2 Concentration and CO at the first moment 2 The difference in concentration is greater than the first CO 2 When the concentration threshold value is reached, acquiring CO at a third moment based on a preset sampling time 2 Concentration; acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration of CO at the fourth moment 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration; acquiring the concentration at a seventh moment based on a preset sampling time, wherein the difference between the concentration at a sixth moment and the concentration at the seventh moment is larger than that of the first CO 2 When the concentration threshold value is reached, the CO at the next moment is continuously acquired based on the preset sampling time 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The concentration difference is smaller than that of second CO 2 A concentration threshold, and taking the (n+1) th moment as a starting point of the stable region;
the preset room calculation formula is based on CO exhaled by human body 2 Content and CO replaced by air conditioner 2 The content is determined, and the preset room calculation formula specifically comprises:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 CO as plateau 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
2. The air conditioner of claim 1, wherein said human exhaled CO 2 The content is specifically determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
3. The air conditioner of claim 1, wherein the air conditioner replaces CO 2 The content is specifically determined by the following formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
4. The air conditioning room size identification method is characterized by comprising 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 CO 2 In an air conditioner of a sensor and a controller, the method includes:
based on preset sampling time and preset CO 2 Concentration threshold determination of CO 2 A starting point of a concentration plateau, the preset CO 2 The concentration threshold includes a first CO 2 Concentration threshold and second CO 2 Concentration threshold, the first CO 2 Concentration threshold is greater than second CO 2 A concentration threshold; based on preset sampling timePresetting CO 2 Concentration threshold determination of CO 2 The starting point of the concentration plateau is specifically: after the air conditioner is started, acquiring CO at a first moment based on a preset sampling time 2 Concentration and CO at the second moment 2 Concentration of CO at the first moment 2 Concentration and CO at the second moment 2 The difference in concentration is greater than the first CO 2 When the concentration threshold value is reached, acquiring CO at a third moment based on a preset sampling time 2 Concentration; acquiring CO at a fourth moment based on a preset sampling time 2 Concentration and CO at the fifth time 2 Concentration of CO at the fourth moment 2 Concentration of CO greater than the third time 2 Concentration of CO less than the fifth moment 2 When the concentration is at the same time, acquiring CO at a sixth moment based on a preset sampling time 2 Concentration; acquiring the concentration at a seventh moment based on a preset sampling time, wherein the difference between the concentration at a sixth moment and the concentration at the seventh moment is larger than that of the first CO 2 When the concentration threshold value is reached, the CO at the next moment is continuously acquired based on the preset sampling time 2 Concentration of CO up to the N-th time 2 Concentration and CO at time n+1 2 The concentration difference is smaller than that of second CO 2 A concentration threshold, and taking the (n+1) th moment as a starting point of the stable region;
acquisition of initial CO 2 Concentration and plateau of CO 2 Concentration;
based on the initial CO 2 Concentration, plateau CO 2 Determining the room volume by using a concentration and a preset room calculation formula, wherein the preset room calculation formula is based on CO exhaled by a human body 2 Content and CO replaced by air conditioner 2 The content is determined, and the preset room calculation formula specifically comprises:
C 1 ＝C 0 +N*T*0.38*1000/V-(C 0 -400)*V 0 *T/V；
wherein C is 1 CO as plateau 2 Concentration, C 0 For initial CO 2 Concentration, V, is room volume.
5. The method of claim 4, wherein the human exhales CO 2 Content ofSpecifically, the method is determined by the following formula:
CO exhaled by human body 2 Content = N x T x 0.38 x 1000/V;
wherein N is the number of people in the room, V is the room volume, T is the CO of the plateau region 2 The time at which the concentration corresponds.
6. The method of claim 4, wherein the air conditioner replaces CO 2 The content is specifically determined by the following formula:
CO replaced by air conditioner 2 Content= (C 0 -400)*V 0 *T/V；
Wherein C is 0 For initial CO 2 Concentration, T is CO in plateau region 2 Moment of concentration correspondence, V 0 For air conditioner ventilation per minute, V is room volume.
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