CN114738963A - Mode control system and method for heat recovery multi-split air conditioner - Google Patents
Mode control system and method for heat recovery multi-split air conditioner Download PDFInfo
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- CN114738963A CN114738963A CN202210482722.XA CN202210482722A CN114738963A CN 114738963 A CN114738963 A CN 114738963A CN 202210482722 A CN202210482722 A CN 202210482722A CN 114738963 A CN114738963 A CN 114738963A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
- F24F11/47—Responding to energy costs
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
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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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- 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
- F24F2140/60—Energy consumption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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Abstract
The invention provides a mode control system of a heat recovery multi-split air conditioner and a control method thereof, wherein the control system comprises: the data processing module is used for acquiring the indoor machine capability Nc by combining an indoor machine capability HPc, an indoor temperature difference coefficient { [ 1 ] c, an evaporator target coefficient { [ 2 ] c and an outdoor temperature correction coefficient { [ 3 ] } c; and Nh for obtaining the hydraulic module capability from the hydraulic module capability HPh, a water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] }; and the control module is used for controlling the compressor to operate according to the indoor energy requirement Nc or the hydraulic module energy requirement Nh according to the comparison result of the difference value Nh-Nc between the hydraulic module energy requirement Nh and the indoor energy requirement Nc and a preset output value. The invention can comprehensively judge when the indoor machine energy needs to be the main and when the hydraulic module energy needs to be the main, thereby ensuring that the capacity output of the indoor machine or the hydraulic module is larger, meeting the requirements of refrigeration and hot water production and improving the operation reliability of the system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a mode control system of a heat recovery multi-split air conditioner and a control method thereof.
Background
In the heat recovery multi-split air-conditioning system with the air-conditioning indoor unit and the hydraulic module, when the system is in a heat recovery mode in which air-conditioning refrigeration and heating water are simultaneously started, on one hand, the refrigeration effect of the air-conditioning indoor unit and the heating water effect of the hydraulic module need to be ensured, and the safety and the reliability of the system need to be considered. Because the number of the indoor units of the air conditioner in the multifunctional multi-split system is more, the indoor units are different in size, the number of the hydraulic modules for opening the water heating system is not constant, and in addition, the water temperature of the domestic hot water is continuously increased, so that the hydraulic modules have high capacity demand when the water temperature is low, have low capacity demand when the water temperature is high, and the refrigerating capacity demand and the water module heating capacity demand of the indoor units of the air conditioner are dynamically changed. The algorithm for judging the mode of the heat recovery multi-split system cannot change along with the change of the working condition, and the mode of the system basically cannot change after the system preliminarily judges that one mode is operated, so that the system parameters in the mode are unreasonable, and the refrigeration effect and the hot water heating effect cannot be considered simultaneously; in some embodiments, there is also a mode change for switching the multi-split system, but the mode change may cause frequent switching of the mode, which affects system safety and reliability.
Disclosure of Invention
In view of the above problems, the present invention provides a mode control system of a heat recovery multi-split air conditioner and a control method thereof, which can change the operation mode of the heat recovery multi-split air conditioner along with the change of working conditions and simultaneously give consideration to the effects of refrigeration and hot water heating.
The invention provides a mode control system of a heat recovery multi-split air conditioner, the heat recovery multi-split air conditioner comprises a hydraulic module, an indoor module and an outdoor module, the outdoor module comprises a compressor, and the control system comprises: a data processing module which combines an indoor unit capability Hpc, an indoor temperature difference coefficient [ - ] 1c, an evaporator target coefficient [ - ] 2c, and an outdoor temperature correction coefficient [ - ] 3c to obtain an indoor unit capability Nc; and Nh for obtaining the hydraulic module capability from the hydraulic module capability HPh, a water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] }; and the control module is used for controlling the compressor to operate according to the requirement of the indoor machine or the requirement of the hydraulic module according to the comparison result of the difference value Nh-Nc between the requirement Nh of the hydraulic module and the requirement Nc of the indoor machine and the preset output value.
The invention combines the indoor machine capacity, the indoor temperature difference, the evaporator parameter and the outdoor environment temperature to obtain the indoor machine energy demand, improves the accuracy of the indoor machine energy demand, obtains the hydraulic module energy demand according to the hydraulic module capacity, the water temperature coefficient, the outdoor temperature coefficient and the hydraulic module target coefficient, improves the accuracy of the hydraulic module energy demand, comprehensively judges when the indoor machine energy demand is dominant and when the hydraulic module energy demand is dominant according to the difference value Nh-Nc of the hydraulic module energy demand Nc and the indoor machine energy demand Nc, ensures that the capacity output of the indoor machine or the hydraulic module is larger, meets the refrigeration and hot water production demands, and improves the system operation reliability.
In an optional technical scheme of the invention, an indoor temperature difference coefficient {. 1c is the difference between the set temperature of the indoor unit and the air return temperature of the indoor unit, and an indoor temperature difference coefficient {. 1c is positively correlated with the difference between the set temperature of the indoor unit and the air return temperature of the indoor unit.
According to the technical scheme, the larger the difference between the set temperature of the indoor unit and the return air temperature of the indoor unit is, the larger the indoor temperature difference coefficient { [ 1 ] c is, and the indoor unit function needs to be increased.
In an alternative solution of the invention the evaporator target coefficient { [ 2 ] c is the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator, the evaporator target coefficient being positively correlated with the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator.
According to this solution, the larger the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator, the larger the target coefficient of the evaporator —. 2c, the more the indoor machine function needs to be increased.
In an alternative solution of the invention the outdoor temperature correction coefficient { [ 3 ] c is related to the outdoor ambient temperature and the outdoor temperature correction coefficient { [ 3 ] c decreases when the outdoor ambient temperature is greater than a first preset value and/or less than a second preset value, and the outdoor temperature correction coefficient { [ 3 ] c increases when the outdoor ambient temperature is within the temperature range of the first preset value and the second preset value, wherein the first preset value is greater than the second preset value.
According to the technical scheme, the outdoor environment temperature is too high or too low, and the outdoor temperature correction coefficient { [ 3 ] c is reduced, so that the operation safety of the system is improved.
In an alternative solution of the invention, the indoor machine can require Nc ═ HPc ═ c ═ 2c 3 c.
According to the technical scheme, the indoor unit function needs to be related to parameters such as the indoor unit capacity HPc, the indoor unit return air temperature T1, the indoor unit set temperature Ts, the evaporator outlet temperature T2B, the evaporator outlet temperature target value T2Bs and the outdoor environment temperature T4, and the accuracy of the indoor unit function needs is improved.
In an optional technical scheme of the invention, the hydraulic module comprises a water tank, wherein the hydraulic module can be represented by Nh, HPh × 1h × 2h × 3h, wherein a water temperature coefficient ≈ 1h, -, 2h, -, is negatively related to the actual water tank temperature, an outdoor temperature coefficient { [ 2 ] h is negatively related to the outdoor environment temperature, a target coefficient { [ 3 ] h of the hydraulic module is the difference between the set water tank temperature and the actual water tank temperature, and a target coefficient { [ 3 ] h of the hydraulic module is positively related to the difference between the set water tank temperature and the actual water tank temperature.
According to the technical scheme, the hydraulic module energy requirement Nh is calculated by combining the hydraulic module capacity HPh, the actual water tank temperature T5, the outdoor environment temperature T4 and the set water tank temperature Ts, so that the accuracy of the hydraulic module energy requirement Nh is improved, wherein: the hydro module capacity HPh is related to the hydro module design capacity, the larger HPh; the water temperature coefficient { [ 1h ] is related to the actual water tank temperature T5, the lower the actual water tank temperature the greater the water temperature coefficient { [ 1h ] }; the outdoor temperature coefficient { [ 2 ] h relates to the outdoor environment temperature T4, the lower the outdoor environment temperature the greater the outdoor temperature coefficient { [ 2 ] h; the hydraulic module target coefficient, [ 3 ] h is related to the set water tank temperature and the actual water tank temperature, the greater the temperature difference between the set water tank temperature and the actual water tank temperature, the greater the hydraulic module target coefficient, [ 3 ] h.
In the optional technical scheme of the invention, when the Nh-Nc is more than or equal to N1, the heat recovery multi-split air conditioner operates according to the main heating mode, and the compressor can operate according to the Nh requirement of the hydraulic module; and Nh-Nc < N2, the heat recovery multi-split air conditioner operates according to the main cooling mode, and the compressor operates according to the indoor energy requirement Nc, wherein N1> N2.
According to the technical scheme, when the outdoor environment temperature is low, the actual water tank temperature is low (for example, the actual water tank temperature is below 20 ℃), the heating water is in large demand, the refrigerating demand is low, the compressor can run according to the hydraulic module requirement Nh, namely, the heating water can be preferentially adjusted to be larger than the refrigerating requirement Nh-Nc > N1, and the heating water can be adjusted to be maximum more quickly.
With the increase of the outdoor environment temperature, the actual water tank temperature is higher (for example, more than 40 degrees), the heating capacity requirement is reduced at the moment, on the contrary, the refrigerating capacity requirement is increased, at the moment, the heating water can be preferentially adjusted to be smaller than the refrigerating capacity and have a certain return difference, namely Nh-Nc is smaller than N2, and the system is switched to the refrigerating capacity. And at the moment, the water is heated, and when the condenser and the outdoor heat exchanger both play the role of the condenser, the refrigeration effect is better.
In an optional technical scheme of the invention, the control module further comprises a switching unit for switching the compressor to operate according to the Nh requirement of the hydraulic module after the Nh-Nc is more than or equal to N1 specified time length is met, or switching unit for switching the compressor to operate according to the Nc requirement of the indoor machine after the Nh-Nc is less than N2 specified time length is met.
According to the technical scheme, the interpretation system can be switched only after meeting certain conditions when one mode is mainly switched and the other mode is mainly switched. The disadvantage of frequent switching of modes is avoided.
The invention further provides a mode control method of the heat recovery multi-split air conditioner, the heat recovery multi-split air conditioner comprises a hydraulic module, an indoor module and an outdoor module, the outdoor module comprises a compressor, and the mode control method of the heat recovery multi-split air conditioner comprises the following steps: the indoor machine capability Nc is obtained by combining the indoor machine capability Hpc, the indoor temperature difference coefficient { [ 1 ] c, } the evaporator target coefficient { [ 2 ] c and the outdoor temperature correction coefficient { [ 3 ] } c; the hydraulic module capacity Nh is obtained from the hydraulic module capacity HPh, the water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] }; and controlling the compressor to operate according to the requirement of the indoor machine or the requirement of the hydraulic module according to the comparison result of the difference value Nh-Nc between the requirement of the hydraulic module Nh and the requirement of the indoor machine Nc and the preset output value.
In the optional technical scheme of the invention, when the Nh-Nc is more than or equal to N1, the heat recovery multi-split air conditioner operates according to the main heating mode, and the compressor can operate according to the Nh requirement of the hydraulic module; and Nh-Nc < N2, the heat recovery multi-split air conditioner operates according to the main cooling mode, and the compressor operates according to the indoor energy requirement Nc, wherein N1> N2.
Drawings
Fig. 1 is a schematic structural diagram of a mode control system of a heat recovery multi-split air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating mode determination of a heat recovery multi-split air conditioner according to an embodiment of the invention.
Fig. 3 is a flowchart illustrating a mode control method of a heat recovery multi-split air conditioner according to an embodiment of the present invention.
Reference numerals:
1, controlling a system; 11 a data processing module; 12 control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a mode control system 1 of a heat recovery multi-split air conditioner, the heat recovery multi-split air conditioner includes a hydraulic module, an indoor module and an outdoor module, the control system 1 includes: a data processing module 11 which combines the indoor unit capacity Hpc, an indoor temperature difference coefficient { [ 1 ] c, { character(s) } 2c and an outdoor temperature correction coefficient } 3c to obtain the indoor unit capacity Nc; and Nh for obtaining the hydraulic module capability from the hydraulic module capability HPh, a water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] }; and the control module 12 is used for controlling the compressor to operate according to the requirement of the indoor machine or the requirement of the hydraulic module according to the comparison result of the difference value Nh-Nc between the requirement of the hydraulic module Nh and the requirement of the indoor machine Nc and the preset output value.
The invention combines the indoor machine capacity, the indoor temperature difference, the evaporator parameter and the outdoor environment temperature to obtain the indoor machine energy demand, improves the accuracy of the indoor machine energy demand, obtains the hydraulic module energy demand according to the hydraulic module capacity, the water temperature coefficient, the outdoor temperature coefficient and the hydraulic module target coefficient, improves the accuracy of the hydraulic module energy demand, comprehensively judges when the indoor machine energy demand is dominant and when the hydraulic module energy demand is dominant according to the difference value Nh-Nc of the hydraulic module energy demand Nh and the indoor machine energy demand Nc, ensures that the capacity output of the indoor machine or the hydraulic module is larger and meets the refrigeration and hot water production energy efficiency.
Specifically, the outdoor module comprises a compressor, an outdoor heat exchanger (condenser), four-way valves (the number of which is not limited) and a gas-liquid separator; the hydraulic module comprises a hydraulic heat exchanger, a water pump, a water tank, a water using side and a refrigerant flow path, and the indoor unit comprises at least two indoor heat exchangers which are arranged in parallel. The hydraulic heat exchanger is connected with the water using side through a water inlet pipe and a water outlet pipe, and performs heat exchange with the hydraulic heat exchanger through the indoor module so as to provide hot water for the water using side. The invention does not limit the concrete connection form of the indoor module, the outdoor module and the hydraulic module, and the air conditioning system capable of realizing the effects of refrigerating and heating water can be applied to the invention.
In a preferred embodiment of the present invention, the indoor unit capability Nc ═ HPc ═ c ═ 2c ═ c @ 3c, HPc is the indoor unit capability, the indoor unit capability HPc is positively correlated with the indoor unit design capability, the higher the indoor unit design capability is, the higher the HPc is, specifically, the indoor unit capability HPc corresponds to the cooling capacity of the indoor unit, such as 2 indoor units, 3 indoor units. The indoor function needs to be related to parameters such as the indoor unit capacity HPc, the indoor unit return air temperature T1, the indoor unit set temperature Ts, the evaporator outlet temperature T2B, the evaporator outlet temperature target value T2Bs, the outdoor environment temperature T4 and the like, so that the accuracy needed by the indoor function is improved.
In the preferred embodiment of the present invention, the value of the indoor unit capacity HPc is 0.2 to 10.
In a preferred embodiment of the invention, the coefficient of indoor temperature difference { [ 1 ] c is the difference between the set temperature of the indoor unit and the indoor unit return air temperature T1, the coefficient of indoor temperature difference { [ 1 ] c having a positive correlation with the difference between the set temperature Ts of the indoor unit and the indoor unit return air temperature T1. The larger the difference between the set temperature of the indoor unit and the return air temperature of the indoor unit, the larger the indoor temperature difference coefficient { [ 1 ] c, and the larger the indoor function. In a specific embodiment of the invention the indoor temperature difference coefficient [. sub.1 c ] has a value of from 0.1 to 3.
In a preferred embodiment of the invention the evaporator target coefficient —. 2c is the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator, the evaporator target coefficient being positively correlated with the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator. The larger the difference between the actual outlet temperature of the evaporator and the target outlet temperature of the evaporator, the larger the target coefficient of evaporator —. 2c, the more the indoor machine function needs to be increased. In a particular embodiment of the invention the evaporator target coefficients —. 2c have a value of from-5 to 10.
In a preferred embodiment of the invention the outdoor temperature correction coefficient { [ 3c ] is related to the outdoor ambient temperature and the outdoor temperature correction coefficient { [ 3c ] decreases when the outdoor ambient temperature is greater than a first preset value and/or less than a second preset value, and the outdoor temperature correction coefficient { [ 3 ] increases when the outdoor ambient temperature is within a temperature range of the first preset value and the second preset value, wherein the first preset value is greater than the second preset value.
By means of the above, an excessively high or low outdoor ambient temperature lowers the outdoor temperature correction coefficient —. 3c, which is beneficial for improving the operating safety of the system. In a specific embodiment of the invention the outdoor temperature correction coefficients [. sub.3 c ] have a value of 0 to 1, a first preset value of 38 ℃ and a second preset value of 15 ℃.
The capability HPc of the indoor unit, the indoor temperature difference coefficient { [ 1 ] c, the evaporator target coefficient { [ 2 ] c and the outdoor temperature correction coefficient { [ 3 ] in the parameter ranges improve the accuracy of the indoor unit capability, are favorable for further improving the accuracy of the indoor unit capability requiring Nc and improve the safety and reliability of system operation.
In a preferred embodiment of the invention, the hydraulic modules can require Nh HPh x 1h x 2h x 3h, wherein HPh is the hydraulic module capacity, HPh is the hydraulic module capacity is related to the hydraulic module design capacity, the greater HPh, in particular the amount of heating corresponding to the hydraulic module, such as 5 p of heating; the water temperature coefficient { (1 h) } is negatively related to the actual water tank temperature, the outdoor temperature coefficient { (2 h) } is negatively related to the outdoor environment temperature, the hydraulic module target coefficient { (3 h) } is the difference between the set water tank temperature and the actual water tank temperature, and the hydraulic module target coefficient { (3 h) } is positively related to the difference between the set water tank temperature and the actual water tank temperature.
Through above-mentioned mode, combine water conservancy module ability HPh, actual water tank temperature T5, outdoor ambient temperature T4, set for water tank temperature Ts and calculate the water conservancy module and need Nh, improved the accuracy that the water conservancy module can need Nh, wherein: the hydraulic module capacity HPh is related to the hydraulic module design capacity, the larger the hydraulic module design capacity is, the larger HPh is, in the specific embodiment of the present invention, the value range of HPh is 1-10; the water temperature coefficient { [ 1h ] is related to the actual water tank temperature T5, the lower the actual water tank temperature the greater the water temperature coefficient { [ 1h ], the specific embodiment of the invention having a value in the range of 0 to 3 of the water temperature coefficient { [ 1h ] -; the outdoor temperature coefficient { [ 2 ] h is related to the outdoor environment temperature T4, the lower the outdoor environment temperature T4, the larger the outdoor temperature coefficient { [ 2 ] h, and in the specific embodiment of the invention, the value of the outdoor temperature coefficient { [ 2 ] h ranges from 0 to 1; the hydraulic module target coefficient, - [ 3 ] h is related to the set water tank temperature Ts and the actual water tank temperature T5, the larger the temperature difference between the set water tank temperature Ts and the actual water tank temperature T5, the larger the hydraulic module target coefficient, - [ 3 ] h, in a specific embodiment of the invention, the value range of the hydraulic module target coefficient, - [ 3 ] h is 0-10. The hydraulic module capability HPh, water temperature coefficient, [ 1 ] h, outdoor temperature coefficient, [ 2 ] h, hydraulic module target coefficient, [ 3 ] h of the above parameter ranges of the invention are advantageous for further improving the accuracy of the hydraulic module capability, which requires Nh, improving the safety and reliability of the operation of the system.
In the preferred embodiment of the invention, as shown in FIG. 2, when Nh-Nc is more than or equal to N1, the heat recovery multi-split air conditioner operates according to the main heating mode, and the compressor operates according to the Nh requirement of the hydraulic module; and Nh-Nc < N2, the heat recovery multi-split air conditioner operates according to the main cooling mode, and the compressor operates according to the indoor energy requirement Nc, wherein N1> N2. Specifically, when the outdoor environment temperature is low, the actual water tank temperature is low (for example, the actual water tank temperature is below 20 ℃), the demand for heating water is large, and the demand for cooling is small, the compressor can operate according to the hydraulic module energy requirement Nh, i.e., the heating water energy needs to be adjusted to be larger than the cooling energy, i.e., Nh-Nc > N1, preferentially, and the heating water energy needs to be adjusted to be maximum for faster operation. With the increase of the outdoor environment temperature, the actual water tank temperature is higher (for example, more than 40 degrees), the heating capacity requirement is reduced at the moment, on the contrary, the refrigerating capacity requirement is increased, at the moment, the heating water can be preferentially adjusted to be smaller than the refrigerating capacity and have a certain return difference, namely Nh-Nc is smaller than N2, and the system is switched to the refrigerating capacity. And at the moment, the water is heated, and when the condenser and the outdoor heat exchanger both play the role of the condenser, the refrigeration effect is better.
In a preferred embodiment of the present invention, the control module 12 further comprises switching the compressor to operate at the hydro-module energy requirement Nh upon satisfaction of Nh-Nc ≧ N1 for the prescribed duration, or switching the compressor to operate at the indoor energy requirement Nc upon satisfaction of Nh-Nc < N2 for the prescribed duration.
By the mode, the judging and reading system can be switched after one mode is mainly used and the other mode is mainly switched, and the mode can be switched only after certain conditions are met, so that the defect of frequent mode switching is overcome.
Referring to fig. 3, a mode control method of a heat recovery multi-split air conditioner according to the present invention, corresponding to the mode control system of the heat recovery multi-split air conditioner, includes: the indoor machine capability Nc is obtained by combining the indoor machine capability HPc, the indoor temperature difference coefficient { [ 1 ] c, the evaporator target coefficient { [ 2 ] c and the outdoor temperature correction coefficient { [ 3 ] } c; the hydraulic module capacity Nh is obtained from the hydraulic module capacity HPh, the water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] }; and controlling the compressor to operate according to the requirement of the indoor machine or the requirement of the hydraulic module according to the comparison result of the difference value Nh-Nc between the requirement of the hydraulic module Nh and the requirement of the indoor machine Nc and a preset output value.
In the preferred embodiment of the invention, when Nh-Nc is more than or equal to N1, the heat recovery multi-split air conditioner operates according to the main heating mode, and the compressor can operate according to the Nh requirement of the hydraulic module; and Nh-Nc < N2, the heat recovery multi-split air conditioner operates according to the main cooling mode, and the compressor operates according to the indoor energy requirement Nc, wherein N1> N2.
In a preferred embodiment of the invention, the method further comprises switching the compressor to operate according to the hydraulic module energy requirement Nh after the specified time length of Nh-Nc ≧ N1 is met, or switching the compressor to operate according to the indoor machine energy requirement Nc after the specified time length of Nh-Nc < N2 is met.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a mode control system of many online machines of heat recovery, many online machines of heat recovery include water conservancy module, indoor module and outdoor module, outdoor module includes the compressor, its characterized in that, control system includes:
the data processing module is used for acquiring the indoor machine capability Nc by combining an indoor machine capability HPc, an indoor temperature difference coefficient { [ 1 ] c, an evaporator target coefficient { [ 2 ] c and an outdoor temperature correction coefficient { [ 3 ] } c; and the hydraulic module ability needs Nh to be obtained from the hydraulic module ability HPh, a water temperature coefficient {. 1h, an outdoor temperature coefficient {. 2h, a hydraulic module target coefficient {. 3 h;
and the control module is used for controlling the compressor to operate according to the indoor energy requirement Nc or the hydraulic module energy requirement Nh according to the comparison result of the difference value Nh-Nc between the hydraulic module energy requirement Nh and the indoor energy requirement Nc and a preset output value.
2. The mode control system of a heat recovery multi-split air conditioner according to claim 1, characterized in that the indoor temperature difference coefficient —. 1c is the difference between the set temperature of the indoor unit and the indoor unit return air temperature, the indoor temperature difference coefficient —. 1c being positively correlated with the difference between the set temperature of the indoor unit and the indoor unit return air temperature.
3. A mode control system of a heat recovery multi-train according to claim 2, characterized in that the evaporator target coefficient —. 2c is the difference between the evaporator actual outlet temperature and the evaporator target outlet temperature, the evaporator target coefficient —. 2c being positively correlated with the difference between the evaporator actual outlet temperature and the evaporator target outlet temperature.
4. Mode control system of a heat recovery multi split air line according to claim 3, characterized in that the outdoor temperature correction coefficient ÷ 3c is related to the outdoor ambient temperature and that the outdoor temperature correction coefficient ÷ 3c decreases when the outdoor ambient temperature is greater than a first preset value and/or less than a second preset value, and the outdoor temperature correction coefficient ÷ 3c increases when the outdoor ambient temperature is within a temperature range of the first preset value and the second preset value, wherein the first preset value is greater than the second preset value.
5. Pattern control system of heat recovery multi-train according to claim 4, characterized in that the indoor machine can require Nc ═ HPc · c · 2c · 3 c.
6. The pattern control system of heat recovery multi-split air line according to claim 4, characterized in that the hydraulic module comprises a water tank, which can require Nh HPh · 1h · 2h · 3h, wherein the water temperature coefficient is negatively correlated with the actual water tank temperature, the outdoor temperature coefficient · 2h is negatively correlated with the outdoor ambient temperature, the hydraulic module target coefficient is the difference between a set water tank temperature and the actual water tank temperature, and the hydraulic module target coefficient is positively correlated with the difference between the set water tank temperature and the actual water tank temperature.
7. The mode control system of the heat recovery multi-split air conditioner as claimed in any one of claims 1 to 6, wherein when Nh-Nc ≧ N1, the heat recovery multi-split air conditioner operates in a main heating mode, and the compressor operates in accordance with the hydro module energy requirement Nh; Nh-Nc < N2, the heat recovery multi-split air conditioner operates in a main cooling mode, and the compressor operates in accordance with the indoor machine demand Nc, where N1> N2.
8. The heat recovery multi-split air conditioning system as set forth in claim 7, wherein the control module further comprises switching the compressor to operate at the hydro module energy requirement Nh after a prescribed period of Nh-Nc ≧ N1 is satisfied, or switching the compressor to operate at the indoor energy requirement Nc after a prescribed period of Nh-Nc < N2 is satisfied.
9. A mode control method of a heat recovery multi-split air conditioner, wherein the heat recovery multi-split air conditioner comprises a hydraulic module, an indoor module and an outdoor module, the outdoor module comprises a compressor, and the mode control method of the heat recovery multi-split air conditioner is characterized by comprising the following steps:
the indoor machine capability Nc is obtained by combining the indoor machine capability HPc, the indoor temperature difference coefficient { [ 1 ] c, the evaporator target coefficient { [ 2 ] c and the outdoor temperature correction coefficient { [ 3 ] } c;
the hydraulic module capacity Nh is obtained from the hydraulic module capacity HPh, the water temperature coefficient { [ 1h, } an outdoor temperature coefficient { [ 2h, } a hydraulic module target coefficient { [ 3h ] };
and controlling the compressor to operate according to the indoor energy requirement Nc or the hydraulic module energy requirement Nh according to the comparison result of the difference value Nh-Nc between the hydraulic module energy requirement Nh and the indoor energy requirement Nc and a preset output value.
10. The mode control method of the heat recovery multi-split air conditioner as claimed in claim 9, wherein when Nh-Nc ≧ N1, the heat recovery multi-split air conditioner operates in a main heating mode, and the compressor operates in accordance with Nh that the hydro module can require; Nh-Nc < N2, the heat recovery multi-split air conditioner operates in a main cooling mode, and the compressor operates in accordance with the indoor machine demand Nc, where N1> N2.
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