CN108954728B - Energy-saving control method for intelligent variable-frequency central air conditioner - Google Patents
Energy-saving control method for intelligent variable-frequency central air conditioner Download PDFInfo
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- CN108954728B CN108954728B CN201810743002.8A CN201810743002A CN108954728B CN 108954728 B CN108954728 B CN 108954728B CN 201810743002 A CN201810743002 A CN 201810743002A CN 108954728 B CN108954728 B CN 108954728B
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an energy-saving control method of an intelligent variable-frequency central air conditioner, wherein a first temperature sensor detects the indoor environment temperature in real time, and a second temperature sensor detects the outdoor environment temperature in real time and sends the outdoor environment temperature to a judgment module; the electronic expansion valve sends the valve opening value at the ambient temperature to the judgment module; the judging module compares the indoor environment temperature with the outdoor environment temperature; if the outdoor environment temperature is higher than or equal to 175% of the indoor environment temperature, turning to the fourth step; if not, turning to the fifth step; the control module sends a first signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, the opening degree of the electronic expansion valve is adjusted, and the indoor environment is adjusted to the temperature of S1; and the control module sends a second signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, the opening degree of the electronic expansion valve is adjusted, and the indoor environment is adjusted to the temperature of S2.
Description
Technical Field
The invention belongs to the field of air conditioners, particularly relates to a cold and hot air conditioner, and particularly relates to an energy-saving control method for an intelligent variable-frequency central air conditioner.
Background
The central air conditioning system is composed of one or more cold and heat source systems and a plurality of air conditioning systems, and the systems are different from the traditional refrigerant type air conditioners, and the centralized air treatment (such as a single machine, VRV) achieves the comfort requirement. The principle of liquid gasification refrigeration is adopted to provide the required cold energy for the air conditioning system so as to offset the cold load of the indoor environment; the heating system provides the air conditioning system with the required heat to offset the indoor ambient heat load.
The existing central air conditioner has a common defect that the energy consumption is high, the energy saving performance is poor, and the electricity cost is high. Taking a 90-terrace house as an example, in hot six July months, the central air conditioner usually needs to consume two to three hundred of electricity charges per month, or even higher, while the ordinary vertical air conditioner only needs to consume one to two hundred of electricity charges.
In view of this, the invention provides an energy-saving control method for an intelligent inverter central air conditioner.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an energy-saving control method for an intelligent variable-frequency central air conditioner, so as to solve the problems of high energy consumption and poor energy-saving performance of the conventional central air conditioner.
In order to achieve the purpose, the invention adopts the following technical scheme: an energy-saving control method for an intelligent variable-frequency central air conditioner comprises a refrigerating and heating system and a control system; the refrigerating and heating system comprises a condenser, an electronic expansion valve, an evaporator and a compressor which are sequentially connected through a refrigerant conveying pipe;
the control system comprises a controller, a first temperature sensor, a second temperature sensor, a driving circuit and a control panel, wherein the controller, the first temperature sensor and the driving circuit are all arranged on the control panel, and the second temperature sensor is arranged in an outdoor environment;
the controller comprises an MCU, wherein the MCU is provided with an analog-to-digital conversion module, a storage module, a judgment module and a control module; a first standard temperature value D1 in a refrigeration state is prestored in the storage module, and the first standard temperature value D1 corresponds to a first standard opening degree B1 of the electronic expansion valve;
the electronic expansion valve comprises a valve seat, a valve core and a driving motor, wherein the driving motor drives the valve core to slide relative to the valve seat so as to regulate the output flow of the electronic expansion valve;
the output end of the temperature sensor is connected with the input end of an analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected with the input end of a storage module, the output end of the storage module is connected with the input end of a judgment module, the output end of the judgment module is connected with the input end of a control module, the output end of the control module is connected with the input end of a driving circuit, and the output end of the driving circuit is connected with an electronic expansion valve;
in the refrigerating state, the method comprises the following steps:
s1, the first temperature sensor detects the indoor environment temperature T1 in real time, meanwhile, the second temperature sensor detects the outdoor environment temperature T2 in real time, and the detected temperature is sent to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 corresponding to the environment temperature T1 to a judgment module;
s2, the determination module compares the detected indoor environment temperature T1 with the outdoor environment temperature T2;
s3, if the outdoor environment temperature T2 is higher than or equal to 175% of the indoor environment temperature T1, then the fourth step is executed; if not, turning to the fifth step; wherein, S4 and S5 are not in sequence;
s4, the control module sends a first signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, and the opening of the electronic expansion valve is adjusted according to the formula of J1= B1 + K1 + 30, so that the indoor environment is adjusted to the temperature of S1= D1 + 65+ T2 + T1 + 10;
and S5, the control module sends a second signal to the drive circuit, so that the drive circuit drives the drive motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J1= B1 + K1 + 50, so that the indoor environment is adjusted to the temperature of S2= D1 + T2 + T1 + 25.
As a further improvement of the present invention, a second standard temperature value D2 in a heating state is stored in advance in the storage module, and the second standard temperature value D2 corresponds to a second standard opening degree B2 of the electronic expansion valve;
in the heating state, the operation is carried out according to the following steps:
the SS1 comprises a first temperature sensor, a second temperature sensor and a judging module, wherein the first temperature sensor detects the indoor environment temperature T1 'in real time, and the second temperature sensor detects the outdoor environment temperature T2' in real time and sends the detected temperature to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 'corresponding to the environment temperature T1' to a judgment module;
SS2, the decision module compares the detected indoor ambient temperature T1 'and outdoor ambient temperature T2';
SS3, if the indoor environment temperature T1 'is higher than or equal to 300% of the outdoor environment temperature T2', then going to the fourth step; if not, turning to the fifth step; wherein, S4 and S5 are not in sequence;
the SS4, the control module sends a third signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, the opening degree of the electronic expansion valve is adjusted according to the formula of J3= B2 + K1 '. 35, and the indoor environment is adjusted to the temperature of S3= D2 + T2 '. 25+ T1 '. 10;
and SS5, the control module sends a fourth signal to the driving circuit to drive the driving motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J4= B2 + 45+ K1 '. 55, so that the indoor environment is adjusted to the temperature of S4= D2 + 50+ T2 '. 25+ T1 '. 25.
As a further improvement of the invention, a temperature-sensing pressure regulating assembly is arranged at the end part of the valve seat, one end of the temperature-sensing pressure regulating assembly is connected with a push rod, and the push rod is connected with a valve core assembly in the valve body.
As a further improvement of the present invention, the condenser and the evaporator each independently include a plurality of fins, the plurality of fins being arranged side by side; a heat pipe inserted into the plurality of fins.
As a further improvement of the present invention, the heat conductive pipe includes a heat conductive pipe body defining therein the refrigerant passage, and a heat conductive pipe thread formed on an inner wall of the heat conductive pipe body.
As a further improvement of the invention, the air conditioner also comprises a four-way valve for switching the direction of the refrigerant in a cooling state and a heating state.
As a further improvement of the invention, the MCU adopts a chip with the model number of STM32F103C8T 6.
The working principle and the effect of the invention are as follows:
the invention relates to an energy-saving control method for an intelligent variable-frequency central air conditioner. Under operating condition, through real-time detection indoor ambient temperature and outdoor ambient temperature, judge indoor ambient temperature and outdoor ambient temperature difference again, according to judging structure self-adaptation regulation indoor temperature to can not let indoor ambient temperature and outdoor ambient temperature difference too big, thereby can effectively prevent the energy extravagant. When the difference is too large, not only energy is wasted, but also the health of the user is affected. The invention only adjusts the difference between the indoor temperature and the outdoor temperature to a reasonable range, thereby ensuring the use of users, not excessively wasting energy and playing the role of energy conservation and emission reduction.
The intelligent air conditioner has high intelligent degree and good energy-saving effect, can effectively prevent energy waste, adaptively adjusts the refrigeration or heating quantity of the air conditioner, plays a role in energy conservation and emission reduction, and does not influence the use of users.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
FIG. 1 is a flow chart of the refrigeration state of an intelligent variable frequency central air conditioner according to an embodiment of the invention;
FIG. 2 is a flow chart of the heating state of the intelligent variable frequency central air conditioner according to the embodiment of the invention;
fig. 3 is a schematic diagram of the intelligent variable-frequency central air conditioner according to the embodiment of the invention.
Detailed Description
The following examples further illustrate the invention. These examples are intended to illustrate the invention, but not to limit it in any way.
Example (b): energy-saving control method for intelligent variable-frequency central air conditioner
Referring to fig. 3, the central air conditioner includes a cooling and heating system and a control system; the refrigerating and heating system comprises a condenser, an electronic expansion valve, an evaporator and a compressor which are sequentially connected through a refrigerant conveying pipe. The condenser and the evaporator respectively and independently comprise a plurality of fins which are arranged side by side; a heat pipe inserted into the plurality of fins. The heat pipe includes heat pipe body and heat pipe screw thread, inject the refrigerant route in the heat pipe body, the heat pipe screw thread forms the inner wall of heat pipe body. The four-way valve is used for switching the direction of the refrigerant in a cooling state and a heating state.
The control system comprises a controller, a first temperature sensor, a second temperature sensor, a driving circuit and a control panel, wherein the controller, the first temperature sensor and the driving circuit are all arranged on the control panel, and the second temperature sensor is arranged in the outdoor environment.
The controller comprises an MCU, wherein the MCU is provided with an analog-to-digital conversion module, a storage module, a judgment module and a control module; the storage module is pre-stored with a first standard temperature value D1 in a refrigeration state, and the first standard temperature value D1 corresponds to a first standard opening B1 of the electronic expansion valve. The valve comprises a valve body and a valve seat, wherein the valve body is provided with a valve core assembly, the valve core assembly is arranged in the valve body, and the valve seat is provided with a temperature sensing pressure adjusting assembly. In this embodiment, the MCU is an STM32F103C8T6 chip.
The electronic expansion valve comprises a valve seat, a valve core and a driving motor, wherein the driving motor drives the valve core to slide relative to the valve seat so as to adjust the output flow of the electronic expansion valve.
The output end of the temperature sensor is connected with the input end of the analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected with the input end of the storage module, the output end of the storage module is connected with the input end of the judgment module, the output end of the judgment module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving circuit, and the output end of the driving circuit is connected with the electronic expansion valve.
With reference to fig. 1, in the refrigerated state, the operation is carried out according to the following steps:
s1, the first temperature sensor detects the indoor environment temperature T1 in real time, meanwhile, the second temperature sensor detects the outdoor environment temperature T2 in real time, and the detected temperature is sent to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 corresponding to the environment temperature T1 to the judgment module.
S2, the determination module compares the detected indoor ambient temperature T1 and the outdoor ambient temperature T2.
S3, if the outdoor environment temperature T2 is higher than or equal to 175% of the indoor environment temperature T1, then the fourth step is executed; if not, turning to the fifth step; wherein, S4 and S5 are not in sequence.
And S4, the control module sends a first signal to the drive circuit to enable the drive circuit to drive the drive motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula J1= B1 + K1 + 30, so that the indoor environment is adjusted to the temperature of S1= D1 + T2 + T1 + 10.
And S5, the control module sends a second signal to the drive circuit, so that the drive circuit drives the drive motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J1= B1 + K1 + 50, so that the indoor environment is adjusted to the temperature of S2= D1 + T2 + T1 + 25.
In addition, in this embodiment, a second standard temperature value D2 in the heating state is stored in the storage module in advance, and the second standard temperature value D2 corresponds to a second standard opening degree B2 of the electronic expansion valve.
Referring to fig. 2, in the heating state, the operation is performed according to the following steps:
the SS1 comprises a first temperature sensor, a second temperature sensor and a judging module, wherein the first temperature sensor detects the indoor environment temperature T1 'in real time, and the second temperature sensor detects the outdoor environment temperature T2' in real time and sends the detected temperature to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 'corresponding to the environment temperature T1' to the judgment module.
SS2, the determination module compares the detected indoor ambient temperature T1 'with the outdoor ambient temperature T2'.
SS3, if the indoor environment temperature T1 'is higher than or equal to 300% of the outdoor environment temperature T2', then going to the fourth step; if not, turning to the fifth step; wherein, S4 and S5 are not in sequence;
and SS4, the control module sends a third signal to the driving circuit to drive the driving motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J3= B2 + K1 '. 35, so that the indoor environment is adjusted to the temperature of S3= D2 + T2 '. 25+ T1 '. 10.
And SS5, the control module sends a fourth signal to the driving circuit to drive the driving motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J4= B2 + 45+ K1 '. 55, so that the indoor environment is adjusted to the temperature of S4= D2 + 50+ T2 '. 25+ T1 '. 25.
It is to be noted that, in the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.
The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
The above list of details is only for the concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.
Claims (6)
1. An energy-saving control method for an intelligent variable-frequency central air conditioner is characterized by comprising the following steps: the central air conditioner comprises a refrigerating and heating system and a control system; the refrigerating and heating system comprises a condenser, an electronic expansion valve, an evaporator and a compressor which are sequentially connected through a refrigerant conveying pipe;
the control system comprises a controller, a first temperature sensor, a second temperature sensor, a driving circuit and a control panel, wherein the controller, the first temperature sensor and the driving circuit are all arranged on the control panel, and the second temperature sensor is arranged in an outdoor environment;
the controller comprises an MCU, wherein the MCU is provided with an analog-to-digital conversion module, a storage module, a judgment module and a control module; a first standard temperature value D1 in a refrigeration state is prestored in the storage module, and the first standard temperature value D1 corresponds to a first standard opening degree B1 of the electronic expansion valve;
the electronic expansion valve comprises a valve seat, a valve core and a driving motor, wherein a temperature sensing pressure regulating assembly is arranged at the end part of the valve seat, one end of the temperature sensing pressure regulating assembly is connected with a push rod, the push rod is connected with a valve core assembly in the valve body, and the driving motor drives the valve core to slide relative to the valve seat so as to regulate the output flow of the electronic expansion valve;
the output ends of the first temperature sensor and the second temperature sensor are connected with the input end of an analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected with the input end of a storage module, the output end of the storage module is connected with the input end of a judgment module, the output end of the judgment module is connected with the input end of a control module, the output end of the control module is connected with the input end of a driving circuit, and the output end of the driving circuit is connected with an electronic expansion valve;
in the refrigerating state, the method comprises the following steps:
s1, the first temperature sensor detects the indoor environment temperature T1 in real time, meanwhile, the second temperature sensor detects the outdoor environment temperature T2 in real time, and the detected temperature is sent to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 corresponding to the environment temperature T1 to a judgment module;
s2, the determination module compares the detected indoor environment temperature T1 with the outdoor environment temperature T2;
s3, if the outdoor environment temperature T2 is higher than or equal to 175% of the indoor environment temperature T1, then the fourth step is executed; otherwise, turning to the fifth step; wherein, S4 and S5 are not in sequence;
s4, the control module sends a first signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, and the opening of the electronic expansion valve is adjusted according to the formula of J1= B1 + K1 + 30, so that the indoor environment is adjusted to the temperature of S1= D1 + 65+ T2 + T1 + 10;
and S5, the control module sends a second signal to the drive circuit, so that the drive circuit drives the drive motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J1= B1 + K1 + 50, so that the indoor environment is adjusted to the temperature of S2= D1 + T2 + T1 + 25.
2. The energy-saving control method of the intelligent variable-frequency central air conditioner according to claim 1, characterized in that: a second standard temperature value D2 in a heating state is prestored in the storage module, and the second standard temperature value D2 corresponds to a second standard opening B2 of the electronic expansion valve;
in the heating state, the operation is carried out according to the following steps:
the SS1 comprises a first temperature sensor, a second temperature sensor and a judging module, wherein the first temperature sensor detects the indoor environment temperature T1 'in real time, and the second temperature sensor detects the outdoor environment temperature T2' in real time and sends the detected temperature to the judging module; meanwhile, the electronic expansion valve sends a valve opening value K1 'corresponding to the environment temperature T1' to a judgment module;
SS2, the decision module compares the detected indoor ambient temperature T1 'and outdoor ambient temperature T2';
SS3, if the indoor environment temperature T1 'is higher than or equal to 300% of the outdoor environment temperature T2', then going to the fourth step; otherwise, turning to the fifth step; wherein, S4 and S5 are not in sequence;
the SS4, the control module sends a third signal to the driving circuit, so that the driving circuit drives the driving motor to rotate, the opening degree of the electronic expansion valve is adjusted according to the formula of J3= B2 + K1 '. 35, and the indoor environment is adjusted to the temperature of S3= D2 + T2 '. 25+ T1 '. 10;
and SS5, the control module sends a fourth signal to the driving circuit to drive the driving motor to rotate, and the opening degree of the electronic expansion valve is adjusted according to the formula of J4= B2 + 45+ K1 '. 55, so that the indoor environment is adjusted to the temperature of S4= D2 + 50+ T2 '. 25+ T1 '. 25.
3. The energy-saving control method of the intelligent variable-frequency central air conditioner according to claim 1, characterized in that: the condenser and the evaporator respectively and independently comprise a plurality of fins which are arranged side by side; a heat pipe inserted into the plurality of fins.
4. The energy-saving control method of the intelligent variable-frequency central air conditioner according to claim 3, characterized in that: the heat pipe includes heat pipe body and heat pipe screw thread, inject the refrigerant route in the heat pipe body, the heat pipe screw thread forms the inner wall of heat pipe body.
5. The energy-saving control method of the intelligent variable-frequency central air conditioner according to claim 4, characterized in that: the four-way valve is used for switching the direction of the refrigerant in a cooling state and a heating state.
6. The energy-saving control method of the intelligent variable-frequency central air conditioner according to claim 5, characterized in that: the MCU adopts a chip with the model of STM32F103C8T 6.
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| KR20000039232A (en) * | 1998-12-11 | 2000-07-05 | 구자홍 | Method for controlling linear expansion valve for multi type air conditioner |
| JP3185791B2 (en) * | 1999-07-09 | 2001-07-11 | 松下電器産業株式会社 | Control device for air conditioner |
| CN202229351U (en) * | 2011-09-20 | 2012-05-23 | 吴卫华 | Double working condition energy-saving air conditioner special for communication |
| CN202470308U (en) * | 2012-03-13 | 2012-10-03 | 广东吉荣空调有限公司 | Synchronous control device for compressor and expansion valve of thermostatic and humidistatic air conditioning unit |
| CN103512145B (en) * | 2012-06-19 | 2016-08-31 | 珠海格力电器股份有限公司 | Adjusting method and adjusting device of electronic expansion valve for air conditioning unit |
| CN104990229B (en) * | 2015-07-28 | 2017-11-10 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method |
| CN106403184B (en) * | 2016-09-23 | 2019-03-19 | 珠海格力电器股份有限公司 | Method and device for calculating initial opening degree of electronic expansion valve |
| CN107642873B (en) * | 2017-10-31 | 2019-12-06 | 海信（山东）空调有限公司 | Air conditioner and opening control method of electronic expansion valve during starting of air conditioner |
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