CN110762781A - Energy-saving heating ventilation air-conditioning control system and method based on Internet of things - Google Patents
Energy-saving heating ventilation air-conditioning control system and method based on Internet of things Download PDFInfo
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- CN110762781A CN110762781A CN201911084555.8A CN201911084555A CN110762781A CN 110762781 A CN110762781 A CN 110762781A CN 201911084555 A CN201911084555 A CN 201911084555A CN 110762781 A CN110762781 A CN 110762781A
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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
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/52—Indication arrangements, e.g. displays
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
Abstract
The invention belongs to the technical field of air conditioner control, and discloses an energy-saving heating ventilation air conditioner control system and method based on the Internet of things, wherein the energy-saving heating ventilation air conditioner control system based on the Internet of things comprises: temperature and humidity detection module, wind speed detection module, central control module, thing allies oneself with communication module, cooling module, heating module, remove flavor module, defrosting module, efficiency test module, display module. According to the invention, the problems of defrosting under the condition of no frost, defrosting under the condition of frosting and the like are effectively prevented through the defrosting module, so that the energy consumed by frosting without defrosting is effectively saved, the energy-saving performance of the air conditioner is improved, the defrosting mode is not entered when defrosting is not needed, the problem that a user feels uncomfortable due to the operation of the defrosting mode is avoided, and the comfortable experience of the user is improved; meanwhile, the energy efficiency testing module realizes the unmanned adjustment of the energy efficiency testing in the laboratory, reduces artificial error operation and lack of experience in the aspect of experimental testing, and improves the laboratory testing efficiency.
Description
Technical Field
The invention belongs to the technical field of air conditioner control, and particularly relates to an energy-saving heating ventilation air conditioner control system and method based on the Internet of things.
Background
Currently, the closest prior art: heating and ventilation are one component of a building. The full name in the subject classification is heat supply gas ventilation and air conditioning engineering, including: the three aspects of heating, ventilation and air conditioning are indispensable parts of the future families in terms of functions. Heating, also known as Heating, supplies load to a building as needed to ensure that the indoor temperature is continuously higher than the external environment as required. A heat sink or the like is generally used. Ventilating: (ventiling), a process of feeding air into the room, or discharging air from the room. Air in a building (referred to as indoor air) is replaced by outdoor air (referred to as fresh air or fresh air), and natural ventilation and mechanical ventilation are generally adopted. Air conditioning: air conditioning, a building environmental control system for regulating the temperature, humidity, cleanliness and air flow rate in a room or space and providing a sufficient amount of fresh air. The air conditioner is divided into a central air conditioner and a household unit type air conditioner. The central air conditioner is characterized in that a comfortable and clean indoor environment can be created. The common household split air conditioner can only solve the problems of cooling and heating, but cannot solve the problems of air humidity and air cleanliness. The air treatment process of the central air conditioner comprises the following processes: firstly, introducing fresh air, cooling the air, then filtering, and filtering out dust, bacteria, viruses, smoke dust or peculiar smell; in addition, a humidifying device is added, and the humidifying device can create the relative humidity of the room of people, wherein the relative humidity reaches about 40%, so that people feel comfortable. However, when the existing heating and ventilation air conditioner works in winter, the attached frost can affect the heat exchange capability of the outdoor heat exchanger, so that the heating capability of the air conditioner is reduced, and the comfort of people is affected; meanwhile, the energy efficiency test of the air conditioner is complex in operation and low in test efficiency.
In summary, the problems of the prior art are as follows: when the existing heating and ventilation air conditioner works in winter, the attached frost can affect the heat exchange capability of an outdoor heat exchanger, so that the heating capability of the air conditioner is reduced, and the comfort of people is affected; meanwhile, the energy efficiency test of the air conditioner is complex in operation and low in test efficiency.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an energy-saving heating ventilation air-conditioning control system and method based on the Internet of things.
The invention is realized in such a way that an energy-saving heating ventilation air-conditioning control method based on the Internet of things comprises the following steps:
firstly, detecting indoor temperature and humidity data by using a temperature and humidity sensor through a temperature and humidity detection module; detecting ventilation wind speed data of the air conditioner by using a wind speed sensor through a wind speed detection module;
secondly, the central control module accesses the Internet of things through the Internet of things communication module by using the wireless transmitter to carry out Internet of things communication; cooling operation is carried out by a cooling module through a refrigerator; performing a heating operation using a heater through a heating module; deodorizing the air by using a deodorizer through a deodorizing module; removing frost formed on the outdoor heat exchanger through a defrosting module;
the method for removing frost formed on the outdoor heat exchanger comprises the following steps:
(1) when the air conditioner is in operation, acquiring real-time outdoor heat exchanger coil temperature, real-time outdoor environment temperature, real-time outdoor unit air speed and real-time air pressure difference between two sides of the outdoor heat exchanger;
(2) acquiring a real-time reference pressure difference corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference pressure difference; the reference pressure difference is the pressure difference of the wind pressure at two sides of the outdoor heat exchanger when the outdoor heat exchanger is not frosted at a certain outdoor unit wind speed;
(3) acquiring the difference between the real-time air pressure difference at two sides of the outdoor heat exchanger and the real-time reference pressure difference as a real-time pressure difference value;
(4) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; the reference differential pressure difference value is the difference between the differential pressure of wind pressure at two sides of the outdoor heat exchanger and the reference differential pressure corresponding to the wind speed of the same outdoor unit when the outdoor heat exchanger frosts at a certain outdoor unit wind speed;
(5) when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode to defrost; the reference differential pressure difference value under a certain outdoor unit wind speed comprises a plurality of reference differential pressure difference values, and the plurality of reference differential pressure difference values form a plurality of reference differential pressure difference value ranges which are in one-to-one correspondence with the frosting severity of the outdoor heat exchanger;
(6) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode to defrost;
(7) obtaining a plurality of real-time reference differential pressure differences corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference, and judging the reference differential pressure difference range in which the real-time differential pressure difference is positioned; when the real-time pressure difference is not less than the minimum value of the real-time reference pressure difference and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, controlling the air conditioner to enter a defrosting mode to defrost, and enabling the defrosting time and the frosting severity of the outdoor heat exchanger determined according to the reference pressure difference range where the real-time pressure difference is located to be in a positive correlation relationship;
thirdly, testing the energy efficiency of the air conditioner through an energy efficiency testing module;
and fourthly, displaying the detected temperature, humidity, wind speed data and energy efficiency test results by using a display through a display module.
Further, when the condition that the real-time differential pressure difference is not less than the real-time reference differential pressure difference and the condition that the real-time outdoor heat exchanger coil temperature is not greater than the real-time frosting point temperature determined according to the real-time outdoor environment temperature are both met within a first set duration, the condition that the defrosting condition is met is judged, and the air conditioner is controlled to enter a defrosting mode to defrost.
Further, determining the real-time frosting point temperature according to the real-time outdoor environment temperature, specifically:
the real-time frosting point temperature is C-6 ℃ of real-time outdoor environment temperature; the real-time outdoor environment temperature is less than 0 ℃, the value of C is a first adjusting value, when the real-time outdoor environment temperature is not less than 0 ℃, the value of C is a second adjusting value, the first adjusting value and the second adjusting value are positive numbers less than 1, and the first adjusting value is greater than the second adjusting value.
Further, the energy efficiency testing method of the air conditioner comprises the following steps:
1) obtaining the low-pressure and the suction temperature according to a preset frequency initial value of the air conditioner and an initial value of the opening degree of the electronic expansion valve;
2) calculating the suction superheat degree according to the low-pressure and the suction temperature of the air conditioner;
3) adjusting the frequency of the air conditioner and the opening of the electronic expansion valve according to the calculated suction superheat degree to enable the air conditioner to reach the optimal effective value;
4) keeping the perfusion quantity and the opening degree of the electronic expansion valve unchanged, and adjusting the frequency of the air conditioner to enable the air conditioner to reach a preset energy efficiency expected value;
5) keeping the perfusion amount and the frequency of the air conditioner unchanged, and adjusting the opening of the electronic expansion valve to enable the air conditioner to reach the optimal energy efficiency value, so that the optimal energy efficiency value of the air conditioner corresponding to the perfusion amount is obtained.
Another object of the present invention is to provide an energy-saving heating, ventilating and air-conditioning control system based on the internet of things based on the energy-saving heating, ventilating and air-conditioning control method based on the internet of things, which includes:
the system comprises a temperature and humidity detection module, a wind speed detection module, a central control module, an internet of things communication module, a cooling module, a heating module, a smell removal module, a defrosting module, an energy efficiency test module and a display module;
the temperature and humidity detection module is connected with the central control module and used for detecting indoor temperature and humidity data through a temperature and humidity sensor;
the wind speed detection module is connected with the central control module and used for detecting ventilation wind speed data of the air conditioner through the wind speed sensor;
the central control module is connected with the temperature and humidity detection module, the wind speed detection module, the internet of things communication module, the cooling module, the heating module, the odor removal module, the defrosting module, the energy efficiency test module and the display module and is used for controlling the modules to normally work through the controller;
the Internet of things communication module is connected with the central control module and is used for accessing the Internet of things through the wireless transmitter to carry out Internet of things communication;
the cooling module is connected with the central control module and is used for cooling through a refrigerator;
the heating module is connected with the central control module and is used for heating operation through the heater;
the odor removal module is connected with the central control module and is used for performing odor removal operation on air through the odor remover;
the defrosting module is connected with the central control module and is used for removing frost accumulated on the outdoor heat exchanger;
the energy efficiency testing module is connected with the central control module and used for testing the energy efficiency of the air conditioner;
and the display module is connected with the central control module and used for displaying the detected temperature, humidity, wind speed data and energy efficiency test results through the display.
Further, the defrost module defrost includes:
the air conditioner operation parameter acquisition module is used for acquiring real-time outdoor heat exchanger coil temperature, real-time outdoor environment temperature, real-time outdoor unit air speed and real-time outdoor heat exchanger two-side air pressure difference when the air conditioner operates;
the real-time reference pressure difference acquisition module is used for acquiring a real-time reference pressure difference corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference pressure difference;
the real-time pressure difference value acquisition module is used for acquiring the difference between the wind pressure difference at two sides of the real-time outdoor heat exchanger and the real-time reference pressure difference as a real-time pressure difference value;
the first real-time reference differential pressure acquisition module is used for acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value;
the defrosting condition judging module is used for judging that a defrosting condition is met and controlling the air conditioner to enter a defrosting mode to defrost when a real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than a real-time frosting point temperature condition determined according to the real-time outdoor environment temperature is met;
the second real-time reference differential pressure obtaining module is used for obtaining a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value;
and the real-time reference differential pressure obtaining modules are used for obtaining a plurality of real-time reference differential pressure difference values corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference values, and judging the reference differential pressure difference range in which the real-time differential pressure difference values are positioned.
Further, the energy efficiency test module includes:
the low-pressure and air suction temperature acquisition module is used for acquiring low-pressure and air suction temperature according to a preset frequency initial value of the air conditioner and an opening initial value of the electronic expansion valve;
the air suction superheat degree calculating module is used for calculating air suction superheat degree according to the low-pressure and the air suction temperature of the air conditioner;
the optimal effective value acquisition module is used for adjusting the frequency of the air conditioner and the opening of the electronic expansion valve according to the calculated suction superheat degree so as to enable the air conditioner to reach the optimal effective value;
the energy efficiency expected value acquisition module is used for keeping the perfusion amount and the opening of the electronic expansion valve unchanged, and adjusting the frequency of the air conditioner to enable the air conditioner to reach a preset energy efficiency expected value;
and the optimal energy efficiency value acquisition module of the air conditioner is used for keeping the perfusion volume and the frequency of the air conditioner unchanged, and adjusting the opening of the electronic expansion valve to enable the air conditioner to reach the optimal energy efficiency value, so that the optimal energy efficiency value of the air conditioner corresponding to the perfusion volume is obtained.
Further, the energy efficiency testing module further comprises:
the perfusion amount adjusting module is used for adjusting the perfusion amount and re-executing the test to obtain the optimal energy efficiency values of the air conditioners corresponding to different perfusion amounts;
the energy efficiency determining module is used for comparing the obtained optimal energy efficiency values of the air conditioners corresponding to different perfusion amounts; determining the maximum value of the optimal energy efficiency values of the air conditioners corresponding to the different perfusion amounts as the maximum energy efficiency value of the air conditioner; and respectively determining the perfusion amount, the frequency of the air conditioner and the opening of the electronic expansion valve corresponding to the determined maximum energy value of the air conditioner as the optimal perfusion amount, the optimal frequency and the optimal opening of the electronic expansion valve.
And the presentation module is used for displaying and/or outputting the maximum effective value, the optimal filling amount, the optimal frequency and/or the optimal opening degree of the electronic expansion valve of the air conditioner.
The invention also aims to provide an information data processing terminal for realizing the energy-saving heating, ventilating and air conditioning control method based on the Internet of things.
Another object of the present invention is to provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to execute the energy-saving, heating, ventilating and air conditioning control method based on the internet of things.
The invention has the advantages and positive effects that: according to the invention, in the running process of the air conditioner, the pressure difference value of the pressure difference and the corresponding reference pressure difference under the wind speed is obtained by detecting the wind pressure difference value at two sides of the outdoor heat exchanger and the wind speed of the outdoor unit through the defrosting module, whether the outdoor heat exchanger frosts and the frosting degree is judged by utilizing the pressure difference value, the judgment is accurate, and the pressure difference value is combined with the temperature of the outdoor coil pipe to be used as a judgment condition to judge whether the defrosting process in a defrosting mode needs to be started, so that the problems of defrosting under the frostless condition, non-defrosting under the frosting condition and the like are effectively prevented, the energy consumed by frostless defrosting is effectively saved, the energy of the air conditioner is improved, the defrosting mode is not started when defrosting is not needed, the problem that a user feels uncomfortable due to the defrosting mode is avoided, and the comfortable experience of. Meanwhile, the energy efficiency testing module realizes the unmanned adjustment of the energy efficiency testing in the laboratory, reduces artificial error operation and lack of experience in the aspect of experimental testing, and improves the laboratory testing efficiency.
Drawings
Fig. 1 is a schematic structural diagram of an energy-saving heating, ventilating and air conditioning control system based on the internet of things according to an embodiment of the invention;
fig. 2 is a flowchart of an energy-saving heating, ventilating and air conditioning control method based on the internet of things according to an embodiment of the invention.
In the figure: 1. a temperature and humidity detection module; 2. a wind speed detection module; 3. a central control module; 4. an Internet of things communication module; 5. a cooling module; 6. a heating module; 7. a deodorizing module; 8. a defrosting module; 9. an energy efficiency testing module; 10. and a display module.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
Aiming at the problems in the prior art, the invention provides an energy-saving heating ventilation air-conditioning control system and method based on the Internet of things, and the invention is described in detail with reference to the attached drawings.
As shown in fig. 1, an energy-saving heating, ventilating and air conditioning control system based on the internet of things provided by the embodiment of the invention includes: temperature and humidity detection module 1, wind speed detection module 2, central control module 3, thing allies oneself with communication module 4, cooling module 5, heat module 6, remove flavor module 7, defrost module 8, efficiency test module 9, display module 10.
The temperature and humidity detection module 1 is connected with the central control module 3 and used for detecting indoor temperature and humidity data through a temperature and humidity sensor;
the wind speed detection module 2 is connected with the central control module 3 and used for detecting ventilation wind speed data of the air conditioner through a wind speed sensor;
the central control module 3 is connected with the temperature and humidity detection module 1, the wind speed detection module 2, the internet of things communication module 4, the cooling module 5, the heating module 6, the odor removal module 7, the defrosting module 8, the energy efficiency test module 9 and the display module 10, and is used for controlling each module to normally work through the controller;
the Internet of things communication module 4 is connected with the central control module 3 and is used for accessing the Internet of things through the wireless transmitter to carry out Internet of things communication;
the cooling module 5 is connected with the central control module 3 and is used for cooling through a refrigerator;
a heating module 6 connected with the central control module 3 for performing a heating operation by a heater;
the smell removal module 7 is connected with the central control module 3 and is used for performing smell removal operation on air through a smell remover;
the defrosting module 8 is connected with the central control module 3 and is used for removing frost formed on the outdoor heat exchanger;
the energy efficiency testing module 9 is connected with the central control module 3 and used for testing the energy efficiency of the air conditioner;
and the display module 10 is connected with the central control module 3 and is used for displaying the detected temperature, humidity, wind speed data and energy efficiency test results through a display.
As shown in fig. 2, the energy-saving heating, ventilating and air conditioning control method based on the internet of things provided by the embodiment of the invention comprises the following steps:
s201: firstly, detecting indoor temperature and humidity data by a temperature and humidity detection module through a temperature and humidity sensor; detecting ventilation wind speed data of the air conditioner by using a wind speed sensor through a wind speed detection module;
s202: secondly, the central control module accesses the Internet of things through the Internet of things communication module by using the wireless transmitter to carry out Internet of things communication; cooling operation is carried out by a cooling module through a refrigerator; performing a heating operation using a heater through a heating module; deodorizing the air by using a deodorizer through a deodorizing module; removing frost formed on the outdoor heat exchanger through a defrosting module;
s203: then, testing the energy efficiency of the air conditioner through an energy efficiency testing module;
s204: and finally, displaying the detected temperature, humidity, wind speed data and energy efficiency test results by using a display through a display module.
In the preferred embodiment of the present invention, the defrosting module 8 provided by the present invention has the following defrosting method:
(1) when the air conditioner is in operation, acquiring real-time outdoor heat exchanger coil temperature, real-time outdoor environment temperature, real-time outdoor unit air speed and real-time air pressure difference between two sides of the outdoor heat exchanger;
(2) acquiring a real-time reference pressure difference corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference pressure difference; the reference pressure difference is the pressure difference of the wind pressure at two sides of the outdoor heat exchanger when the outdoor heat exchanger is not frosted at a certain outdoor unit wind speed;
(3) acquiring the difference between the real-time air pressure difference at two sides of the outdoor heat exchanger and the real-time reference pressure difference as a real-time pressure difference value;
(4) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; the reference differential pressure difference value is the difference between the differential pressure of wind pressure at two sides of the outdoor heat exchanger and the reference differential pressure corresponding to the wind speed of the same outdoor unit when the outdoor heat exchanger frosts at a certain outdoor unit wind speed;
(5) when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode to defrost; the reference differential pressure difference value under a certain outdoor unit wind speed comprises a plurality of reference differential pressure difference values, and the plurality of reference differential pressure difference values form a plurality of reference differential pressure difference value ranges which are in one-to-one correspondence with the frosting severity of the outdoor heat exchanger;
(6) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode for defrosting, specifically:
(7) obtaining a plurality of real-time reference differential pressure differences corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference, and judging the reference differential pressure difference range in which the real-time differential pressure difference is positioned; and when the real-time pressure difference is not less than the minimum value of the real-time reference pressure difference and the real-time outdoor heat exchanger coil temperature is not greater than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, controlling the air conditioner to enter a defrosting mode to defrost, and enabling the defrosting time and the frosting severity of the outdoor heat exchanger determined according to the reference pressure difference range where the real-time pressure difference is located to be in positive correlation.
If the condition that the real-time differential pressure difference is not less than the real-time reference differential pressure difference and the condition that the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature determined according to the real-time outdoor environment temperature are both met within the first set duration, the condition that the defrosting is met is judged, and the air conditioner is controlled to enter a defrosting mode to defrost.
The invention provides a method for determining the real-time frosting point temperature according to the real-time outdoor environment temperature, which comprises the following steps:
the real-time frosting point temperature is C-6 ℃ of real-time outdoor environment temperature; the real-time outdoor environment temperature is less than 0 ℃, the value of C is a first adjusting value, when the real-time outdoor environment temperature is not less than 0 ℃, the value of C is a second adjusting value, the first adjusting value and the second adjusting value are positive numbers less than 1, and the first adjusting value is greater than the second adjusting value.
When the air conditioner is controlled to enter the defrosting mode to defrost, if the real-time pressure difference is 0 or the real-time outdoor heat exchanger coil temperature is greater than the set defrosting ending temperature, the condition that defrosting ending is met is judged, and the air conditioner is controlled to exit the defrosting mode.
In a preferred embodiment of the present invention, the energy efficiency testing module 9 provided by the present invention has the following testing method:
1) obtaining the low-pressure and the suction temperature according to a preset frequency initial value of the air conditioner and an initial value of the opening degree of the electronic expansion valve;
2) calculating the suction superheat degree according to the low-pressure and the suction temperature of the air conditioner;
3) adjusting the frequency of the air conditioner and the opening of the electronic expansion valve according to the calculated suction superheat degree to enable the air conditioner to reach the optimal effective value; the testing step comprises:
4) keeping the perfusion quantity and the opening degree of the electronic expansion valve unchanged, and adjusting the frequency of the air conditioner to enable the air conditioner to reach a preset energy efficiency expected value;
5) keeping the perfusion amount and the frequency of the air conditioner unchanged, and adjusting the opening of the electronic expansion valve to enable the air conditioner to reach the optimal energy efficiency value, so that the optimal energy efficiency value of the air conditioner corresponding to the perfusion amount is obtained.
The invention also comprises a perfusion amount adjusting step after the step 4), wherein the perfusion amount adjusting step is used for:
and adjusting the perfusion amount, and re-executing the testing step to obtain the optimal energy efficiency values of the air conditioner corresponding to different perfusion amounts.
After the perfusion volume adjusting step provided by the invention, the perfusion volume adjusting method further comprises an energy efficiency determining step, wherein the energy efficiency determining step is used for:
comparing the obtained optimal energy efficiency values of the air conditioners corresponding to the different perfusion amounts;
determining the maximum value of the optimal energy efficiency values of the air conditioners corresponding to the different perfusion amounts as the maximum energy efficiency value of the air conditioner;
and respectively determining the perfusion amount, the frequency of the air conditioner and the opening of the electronic expansion valve corresponding to the determined maximum energy value of the air conditioner as the optimal perfusion amount, the optimal frequency and the optimal opening of the electronic expansion valve.
After the energy efficiency determining step provided by the present invention, the method further comprises a presenting step for:
and displaying and/or outputting the maximum effective value, the optimal filling amount, the optimal frequency and/or the optimal opening degree of the electronic expansion valve of the air conditioner.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The energy-saving heating ventilation air-conditioning control method based on the Internet of things is characterized by comprising the following steps of:
firstly, detecting indoor temperature and humidity data by using a temperature and humidity sensor through a temperature and humidity detection module; detecting ventilation wind speed data of the air conditioner by using a wind speed sensor through a wind speed detection module;
secondly, the central control module accesses the Internet of things through the Internet of things communication module by using the wireless transmitter to carry out Internet of things communication; cooling operation is carried out by a cooling module through a refrigerator; performing a heating operation using a heater through a heating module; deodorizing the air by using a deodorizer through a deodorizing module; removing frost formed on the outdoor heat exchanger through a defrosting module;
the method for removing frost formed on the outdoor heat exchanger comprises the following steps:
(1) when the air conditioner is in operation, acquiring real-time outdoor heat exchanger coil temperature, real-time outdoor environment temperature, real-time outdoor unit air speed and real-time air pressure difference between two sides of the outdoor heat exchanger;
(2) acquiring a real-time reference pressure difference corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference pressure difference; the reference pressure difference is the pressure difference of the wind pressure at two sides of the outdoor heat exchanger when the outdoor heat exchanger is not frosted at a certain outdoor unit wind speed;
(3) acquiring the difference between the real-time air pressure difference at two sides of the outdoor heat exchanger and the real-time reference pressure difference as a real-time pressure difference value;
(4) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; the reference differential pressure difference value is the difference between the differential pressure of wind pressure at two sides of the outdoor heat exchanger and the reference differential pressure corresponding to the wind speed of the same outdoor unit when the outdoor heat exchanger frosts at a certain outdoor unit wind speed;
(5) when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode to defrost; the reference differential pressure difference value under a certain outdoor unit wind speed comprises a plurality of reference differential pressure difference values, and the plurality of reference differential pressure difference values form a plurality of reference differential pressure difference value ranges which are in one-to-one correspondence with the frosting severity of the outdoor heat exchanger;
(6) acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value; when the real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, and controlling the air conditioner to enter a defrosting mode to defrost;
(7) obtaining a plurality of real-time reference differential pressure differences corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference, and judging the reference differential pressure difference range in which the real-time differential pressure difference is positioned; when the real-time pressure difference is not less than the minimum value of the real-time reference pressure difference and the real-time outdoor heat exchanger coil temperature is not more than the real-time frosting point temperature condition determined according to the real-time outdoor environment temperature, judging that the defrosting condition is met, controlling the air conditioner to enter a defrosting mode to defrost, and enabling the defrosting time and the frosting severity of the outdoor heat exchanger determined according to the reference pressure difference range where the real-time pressure difference is located to be in a positive correlation relationship;
thirdly, testing the energy efficiency of the air conditioner through an energy efficiency testing module;
and fourthly, displaying the detected temperature, humidity, wind speed data and energy efficiency test results by using a display through a display module.
2. The energy-saving heating ventilation air-conditioning control method based on the internet of things as claimed in claim 1, wherein when the condition that the real-time differential pressure difference is not less than the real-time reference differential pressure difference and the condition that the real-time outdoor heat exchanger coil temperature is not greater than the real-time frosting point temperature determined according to the real-time outdoor environment temperature are both met within a first set duration, it is determined that a defrosting condition is met, and the air-conditioner is controlled to enter a defrosting mode for defrosting.
3. The energy-saving heating ventilation air-conditioning control method based on the internet of things as claimed in claim 1, wherein the real-time frosting point temperature is determined according to the real-time outdoor environment temperature, and specifically comprises the following steps:
the real-time frosting point temperature is C-6 ℃ of real-time outdoor environment temperature; the real-time outdoor environment temperature is less than 0 ℃, the value of C is a first adjusting value, when the real-time outdoor environment temperature is not less than 0 ℃, the value of C is a second adjusting value, the first adjusting value and the second adjusting value are positive numbers less than 1, and the first adjusting value is greater than the second adjusting value.
4. The energy-saving heating ventilation air-conditioning control method based on the internet of things as claimed in claim 1, wherein the method for testing the energy efficiency of the air conditioner is as follows:
1) obtaining the low-pressure and the suction temperature according to a preset frequency initial value of the air conditioner and an initial value of the opening degree of the electronic expansion valve;
2) calculating the suction superheat degree according to the low-pressure and the suction temperature of the air conditioner;
3) adjusting the frequency of the air conditioner and the opening of the electronic expansion valve according to the calculated suction superheat degree to enable the air conditioner to reach the optimal effective value;
4) keeping the perfusion quantity and the opening degree of the electronic expansion valve unchanged, and adjusting the frequency of the air conditioner to enable the air conditioner to reach a preset energy efficiency expected value;
5) keeping the perfusion amount and the frequency of the air conditioner unchanged, and adjusting the opening of the electronic expansion valve to enable the air conditioner to reach the optimal energy efficiency value, so that the optimal energy efficiency value of the air conditioner corresponding to the perfusion amount is obtained.
5. An energy-saving heating ventilation and air conditioning control system based on the internet of things and based on the energy-saving heating ventilation and air conditioning control method based on the internet of things as claimed in any one of claims 1 to 4, wherein the energy-saving heating ventilation and air conditioning control system based on the internet of things comprises:
the system comprises a temperature and humidity detection module, a wind speed detection module, a central control module, an internet of things communication module, a cooling module, a heating module, a smell removal module, a defrosting module, an energy efficiency test module and a display module;
the temperature and humidity detection module is connected with the central control module and used for detecting indoor temperature and humidity data through a temperature and humidity sensor;
the wind speed detection module is connected with the central control module and used for detecting ventilation wind speed data of the air conditioner through the wind speed sensor;
the central control module is connected with the temperature and humidity detection module, the wind speed detection module, the internet of things communication module, the cooling module, the heating module, the odor removal module, the defrosting module, the energy efficiency test module and the display module and is used for controlling the modules to normally work through the controller;
the Internet of things communication module is connected with the central control module and is used for accessing the Internet of things through the wireless transmitter to carry out Internet of things communication;
the cooling module is connected with the central control module and is used for cooling through a refrigerator;
the heating module is connected with the central control module and is used for heating operation through the heater;
the odor removal module is connected with the central control module and is used for performing odor removal operation on air through the odor remover;
the defrosting module is connected with the central control module and is used for removing frost accumulated on the outdoor heat exchanger;
the energy efficiency testing module is connected with the central control module and used for testing the energy efficiency of the air conditioner;
and the display module is connected with the central control module and used for displaying the detected temperature, humidity, wind speed data and energy efficiency test results through the display.
6. The internet of things-based energy-saving heating, ventilating and air conditioning control system of claim 5, wherein the defrost module defrost comprises:
the air conditioner operation parameter acquisition module is used for acquiring real-time outdoor heat exchanger coil temperature, real-time outdoor environment temperature, real-time outdoor unit air speed and real-time outdoor heat exchanger two-side air pressure difference when the air conditioner operates;
the real-time reference pressure difference acquisition module is used for acquiring a real-time reference pressure difference corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference pressure difference;
the real-time pressure difference value acquisition module is used for acquiring the difference between the wind pressure difference at two sides of the real-time outdoor heat exchanger and the real-time reference pressure difference as a real-time pressure difference value;
the first real-time reference differential pressure acquisition module is used for acquiring a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value;
the defrosting condition judging module is used for judging that a defrosting condition is met and controlling the air conditioner to enter a defrosting mode to defrost when a real-time pressure difference value is not less than the real-time reference pressure difference value condition and the real-time outdoor heat exchanger coil temperature is not more than a real-time frosting point temperature condition determined according to the real-time outdoor environment temperature is met;
the second real-time reference differential pressure obtaining module is used for obtaining a real-time reference differential pressure difference value corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference value;
and the real-time reference differential pressure obtaining modules are used for obtaining a plurality of real-time reference differential pressure difference values corresponding to the real-time outdoor unit wind speed according to the known corresponding relation between the outdoor unit wind speed and the reference differential pressure difference values, and judging the reference differential pressure difference range in which the real-time differential pressure difference values are positioned.
7. The energy-saving heating, ventilating and air-conditioning control system based on the internet of things of claim 5, wherein the energy efficiency test module comprises:
the low-pressure and air suction temperature acquisition module is used for acquiring low-pressure and air suction temperature according to a preset frequency initial value of the air conditioner and an opening initial value of the electronic expansion valve;
the air suction superheat degree calculating module is used for calculating air suction superheat degree according to the low-pressure and the air suction temperature of the air conditioner;
the optimal effective value acquisition module is used for adjusting the frequency of the air conditioner and the opening of the electronic expansion valve according to the calculated suction superheat degree so as to enable the air conditioner to reach the optimal effective value;
the energy efficiency expected value acquisition module is used for keeping the perfusion amount and the opening of the electronic expansion valve unchanged, and adjusting the frequency of the air conditioner to enable the air conditioner to reach a preset energy efficiency expected value;
and the optimal energy efficiency value acquisition module of the air conditioner is used for keeping the perfusion volume and the frequency of the air conditioner unchanged, and adjusting the opening of the electronic expansion valve to enable the air conditioner to reach the optimal energy efficiency value, so that the optimal energy efficiency value of the air conditioner corresponding to the perfusion volume is obtained.
8. The internet of things-based energy-saving heating, ventilating and air conditioning control system of claim 7, wherein the energy efficiency test module further comprises:
the perfusion amount adjusting module is used for adjusting the perfusion amount and re-executing the test to obtain the optimal energy efficiency values of the air conditioners corresponding to different perfusion amounts;
the energy efficiency determining module is used for comparing the obtained optimal energy efficiency values of the air conditioners corresponding to different perfusion amounts; determining the maximum value of the optimal energy efficiency values of the air conditioners corresponding to the different perfusion amounts as the maximum energy efficiency value of the air conditioner; respectively determining the perfusion amount, the frequency of the air conditioner and the opening of the electronic expansion valve corresponding to the determined maximum energy value of the air conditioner as an optimal perfusion amount, an optimal frequency and an optimal opening of the electronic expansion valve;
and the presentation module is used for displaying and/or outputting the maximum effective value, the optimal filling amount, the optimal frequency and/or the optimal opening degree of the electronic expansion valve of the air conditioner.
9. An information data processing terminal for realizing the energy-saving heating, ventilating and air conditioning control method based on the Internet of things as claimed in any one of claims 1 to 4.
10. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the internet of things-based energy-saving heating, ventilating and air conditioning control method according to any one of claims 1 to 4.
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