CN107143967B - Control method of one-to-many photovoltaic ice making cold storage air conditioner - Google Patents
Control method of one-to-many photovoltaic ice making cold storage air conditioner Download PDFInfo
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- 230000003139 buffering effect Effects 0.000 claims abstract description 8
- 230000001276 controlling effect Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 6
- 230000003828 downregulation Effects 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 abstract description 12
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- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000002826 coolant Substances 0.000 description 7
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a control method of a one-to-many photovoltaic ice making cold storage air conditioner, which comprises the process of executing operation control of a down-conversion water pump, an electronic regulating valve and an indoor fan by a cold supply cycle. Detecting the outdoor temperature T0, the indoor temperatures T1 and T2 of each room and the like, and adjusting the opening of a corresponding electronic regulating valve and the wind speed of an indoor fan according to the disturbance of the indoor temperature of each running room; determining the operation frequency range of the variable-frequency water pump according to whether the subinterval determined by combining the outdoor environment temperature T0 with the number of the operation air conditioning rooms enters a disturbance temperature adjustment mode or not; according to the disturbance of the total Tm of the indoor temperatures of all running rooms in the range of the section, the running frequency of the variable-frequency water pump is regulated; and when the outdoor temperature T0 is smaller than the set temperature T2 or the user is powered off, entering a buffering noise reduction stopping mode. The intelligent control system realizes the intelligent control of automatic stopping and starting of the air conditioners in each room without mutual influence, and has the advantages of energy saving, comfort, silence and the like.
Description
Technical Field
The invention relates to a control method of a one-to-many photovoltaic ice making cold storage air conditioner, and belongs to the technical field of automatic control.
Background
With the development of social progress and economy, air conditioners are indispensable household appliances in life of people, and particularly in hot summer, air conditioners are necessary for improving the comfort environment of living, so that air conditioners are also the household appliances with the greatest power consumption in families. The environmental problems are increasingly serious due to the wide utilization of fossil energy, and moreover, as the trend of global warming is increasingly serious, the national power grid pressure is continuously increased, and a solar ice storage device is proposed, and all-weather cooling can be realized by utilizing photovoltaic power generation to produce ice for storage.
In a variable-frequency air conditioner control system in the related art, the operation mode of an air conditioner is that refrigerating medium circulates and the frequency of a compressor is regulated by setting related temperature, but the control system of a one-to-many photovoltaic ice making cold storage air conditioner is not widely studied; because the multi-split air conditioning system is used in occasions with complex changes of the flow of people, such as public places of hospitals, office buildings, malls and the like, the disturbance of indoor temperature changes is frequent, and in addition, the indoor temperature and the building absorption are influenced by complex weather; therefore, considering the requirements of users on energy conservation, comfort, silence and the like of an air conditioning system, a novel control system of a one-to-many photovoltaic ice making cold storage air conditioner is always the object of research.
Disclosure of Invention
The invention aims at providing a control method of a one-to-many photovoltaic ice making cold storage air conditioner, which solves the problems that: 1, the problem of energy conservation of the operation of an air conditioning system in complicated and changeable weather; 2, the problem of poor human comfort caused by disturbance change of indoor temperature; and 3, realizing automatic stopping and starting of the air conditioning system and the noise problem of the indoor assembly caused by the automatic stopping and starting of the air conditioning system. In order to solve the technical problems, the control method provided by the invention is realized by adopting the following technical scheme:
a control method of a one-to-many photovoltaic ice making cold accumulation air conditioner comprises the processes of performing down-regulation variable frequency water pump operation control, electronic regulating valve and indoor fan operation control by a cold supply cycle:
the air conditioner detects an open operating condition and enters a selected mode of operation.
The starting operation condition is to detect the outdoor temperature T0, compare the outdoor environment temperature T0 with the set temperatures T1 and T2 or judge whether the user starts up or not, if yes, start up and enter the corresponding mode operation, if no, continue the comparison.
In the operation mode, the outdoor environment temperature T0 is detected, the outdoor environment temperature T0 is compared with the set temperature ranges [ T11, T22] to determine the subinterval to which the outdoor environment temperature T0 belongs, and the operation interval of the variable-frequency water pump is determined by combining the operation quantity of the indoor air conditioners and the combination of the indoor environment temperature T0 and the set temperature ranges [ T11, T22 ].
Detecting the temperature t1 and t2 of each running room, comparing the temperature of each running room with the set temperature ts, and adjusting the opening of the electronic regulating valve Gn of the corresponding throttling element and the wind speed of the corresponding indoor fan according to the difference value of the indoor temperature of each running room and the set temperature ts. Detecting the total sum Tm of the indoor temperatures t1, t2 and the like of each running room, comparing the total sum Tm of the indoor temperatures t1, t2 and the like of each running room with a set temperature Ts, and adjusting the running frequency of the variable-frequency water pump in the running interval of the running frequency of the variable-frequency water pump according to the difference between the total sum Tm of the indoor temperatures t1, t2 and the like of each running room and the set temperature Ts.
Specifically, setting a difference gradient between the indoor environment temperature tn and the set temperature ts, and feeding back and adjusting the running states of the electronic regulating valve and the indoor fan; setting a difference gradient between the sum Tm of the indoor temperatures of all the running rooms and the set temperature Ts, and feeding back and adjusting the running frequency of the variable-frequency water pump.
According to the control strategy, the automatic stopping and starting of the air conditioning system in complex weather is realized, the use is more convenient, the energy absorption of the building is further influenced by the outdoor environment temperature, the running frequency of the variable-frequency water pump is regulated by combining the outdoor environment temperature, the maximum benefit of energy is further obtained, and the energy consumption of the building can be reduced to the greatest extent.
Specifically, as the outdoor ambient temperature decreases, the building absorption decreases, and the operating frequency of the variable frequency water pump correspondingly decreases to maintain the comfort of the room temperature. When the outdoor environment temperature rises, the building absorption becomes high, and the running frequency of the variable-frequency water pump correspondingly increases in order to keep the comfort of the room temperature.
According to the above air conditioner control method, after detecting the temperatures t1, t2, etc. of each room that has been operated, the method specifically further includes the steps of:
when the running arbitrary indoor environment temperature tn is larger than the set temperature ts, the absolute value delta t of the difference value of the indoor environment temperature tn and the set temperature ts is compared with a first set difference value delta t1, when the absolute value delta t of the difference value is larger than the first set difference value delta t1, the opening of the electronic regulating valve is increased, the indoor fan is accelerated, and when the absolute value delta t of the difference value is smaller than or equal to the first set difference value delta t1, the opening of the electronic regulating valve and the indoor fan are kept unchanged; when the running arbitrary indoor environment temperature tn is smaller than the set temperature ts, the absolute value delta t of the difference between the indoor environment temperature tn and the set temperature ts is compared with the first set difference delta t1, when the absolute value delta t of the difference is larger than the first set difference delta t1, the opening of the electronic regulating valve is reduced, the indoor fan is decelerated, and when the absolute value delta t of the difference is smaller than or equal to the first set difference delta t1, the opening of the electronic regulating valve and the indoor fan are kept unchanged.
Further, when the total Tm of the indoor temperatures T1, T2, etc. of each room in operation is greater than the set temperature Ts, the absolute value Δt of the difference between the total Tm of the indoor temperatures of each room in operation and the set temperature Ts is compared with a second set difference Δt1, when the absolute value Δt of the difference is greater than the second set difference Δt1, the operation frequency of the variable frequency water pump is raised, and when the absolute value Δt of the difference is less than or equal to the second set difference Δt1, the operation frequency of the variable frequency water pump is kept unchanged; when the total sum Tm of the indoor temperatures T1, T2 and the like of each running room is smaller than the set temperature Ts, the absolute value DeltaT of the difference between the total sum Tm of the indoor temperatures of each running room and the set temperature Ts is compared with a second set difference DeltaT 1, when the absolute value DeltaT of the difference is larger than the first set difference DeltaT 1, the running frequency of the variable-frequency water pump is reduced, and when the absolute value DeltaT of the difference is smaller than or equal to the second set difference DeltaT 1, the running frequency of the variable-frequency water pump is kept unchanged.
Specifically, the set temperature Ts is an indefinite value and corresponds to the number of rooms running one by one.
According to the control strategy, the control method for observing the indoor temperature change by setting the indoor temperature change gradient and the detection time gradient and timing disturbance effectively solves the problem of poor comfort caused by indoor temperature disturbance caused by people flow and other problems.
According to the air conditioner control method, after controlling the opening degree of the electronic regulating valve, the rotating speed of the indoor fan and the operating frequency of the variable frequency water pump, the method specifically further comprises the following steps:
when the variable-frequency water pump is lower than a frequency set value fmin, the variable-frequency water pump frequency, the opening of the electronic regulating valve and the rotating speed of the indoor fan are all operated in the running state at the last moment, and after a certain time delay, the variable-frequency water pump enters a buffering noise reduction stopping mode;
when the variable-frequency water pump is higher than the frequency set value fmax, the variable-frequency water pump frequency, the opening of the electronic regulating valve and the rotating speed of the indoor fan are all operated in the running state at the last moment.
The variable-frequency water pump frequency set value fmin is the variable-frequency water pump operation frequency corresponding to the minimum value of the outdoor environment temperature subinterval when a single room operates, and the variable-frequency water pump frequency set value fmax is the variable-frequency water pump operation frequency corresponding to the maximum value of the outdoor environment temperature subinterval when all rooms operate.
According to the air conditioner control method as described above, after entering the buffering noise reduction stop mode, the method specifically further includes the steps of: maintaining the frequency of the variable-frequency water pump, the opening of the electronic regulating valve and the running state of the indoor fan at the last moment, timing the running time of the variable-frequency water pump, and simultaneously acquiring the running indoor environment temperatures t1 and t2 and the like; when the running time does not reach the set time, if any indoor environment temperature tn meets a stop condition, controlling the opening of the corresponding electronic regulating valve to be reduced, stopping running of the corresponding indoor fan, correspondingly reducing the running frequency partition of the variable-frequency water pump, and if not, running the corresponding electronic regulating valve opening and the indoor fan in a first set running state. Timing the operation time, acquiring each indoor environment temperature if the operation time does not reach the set operation time, and controlling the opening of the corresponding electronic regulating valve to be reduced if any indoor environment temperature tn meets the stop condition, wherein the corresponding indoor fan stops operating, and the operation frequency of the variable-frequency water pump is correspondingly reduced in a partition mode; when the running time reaches the set running time, controlling the opening of the corresponding electronic regulating valve to be reduced, stopping running the corresponding indoor fan, and correspondingly reducing the running frequency partition of the variable-frequency water pump; when the corresponding electronic regulating valves and the indoor fans in each room stop running, the variable-frequency water pump is closed; if not, the buffer noise reduction stopping mode is exited.
According to the control strategy, the variable-frequency water pump, the electronic regulating valve and the indoor fan are closed in a delayed manner, and the indoor temperature change is detected at the same time, so that the noise problem caused by frequent stopping and starting is effectively solved.
According to the air conditioner control method, the frequency-variable water pump operation frequency is correspondingly reduced in the subareas, wherein the frequency-variable water pump operation frequency corresponds to the subareas which are jointly determined by the total number of air conditioner operation rooms and the outdoor environment temperature one by one, namely, when any number of indoor air conditioners are operated and the outdoor environment temperature is reached, the current frequency-variable water pump operation frequency is operated in the interval to which the corresponding frequency belongs.
According to the air conditioner control method as described above, the set operation times are fixed values, the set temperatures are variable values, and the first set operation state is a low-consumption operation state.
Compared with the prior art, in the control method of the one-to-many ice making cold storage air conditioner, the innovation of the invention is that:
by executing the control of the operating frequency of the outdoor variable frequency water pump, the control method comprises 2 groups of corresponding subintervals: the operation frequency of the variable-frequency water pump is controlled by the subinterval of the quantity of the outdoor environment temperature combined indoor operation air conditioners and the subinterval of the total Tm of the indoor environment temperatures t1 and t 2; the operation frequency of the outdoor variable-frequency water pump is adjusted through a combined control strategy of combining 2 groups of subintervals; the operation frequency of the outdoor variable-frequency water pump is regulated by a combined control strategy combining the change of the outdoor environment temperature and the change of the sum of the indoor environment temperatures t1 and t2, so that the building energy consumption is reduced to the maximum extent, the maximization of energy benefit is realized, and the energy-saving requirement of a user on an air conditioner is met.
The indoor fan rotating speed of a certain room and the control of the corresponding electronic regulating valve are executed to regulate the flow of the circulating working medium, so that unstable disturbance of indoor environment temperature is regulated, indoor temperature is effectively kept in a comfortable range, the problem that the indoor temperature is unstable due to the influence of factors such as people flow and the like and poor temperature comfort is caused is solved, accurate and rapid indoor temperature regulation is realized through a combined control strategy combining the change of the outdoor environment temperature and the change of the sum of the indoor environment temperatures t1 and t2, the accurate control of single room temperature is finally improved, and the comfort requirement of a user on the indoor environment temperature is met.
The flow of the circulating working medium is slowly regulated by executing the combined control of the indoor fan, the electronic regulating valve and the variable-frequency water pump in a single room; the noiseless stop of the indoor fans and the electronic regulating valves in each room is accurately realized, the problem of noise caused by deformation of parts due to large temperature difference between the temperature of parts such as an indoor unit body structural part, an indoor heat exchanger and the like and the indoor environment is avoided, and the requirement of a user on the mute performance of an air conditioner is met.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a multi-split photovoltaic ice making cold storage air conditioner control system according to the present invention.
Fig. 2 is a schematic flow chart of a buffering noise reduction stop mode in an embodiment of a one-to-many photovoltaic ice making cold storage air conditioner control system according to the present invention.
Fig. 3 is a schematic structural diagram of a one-to-many photovoltaic ice making cold storage air conditioner control system of the present invention.
Fig. 4 is a block diagram of the operation frequency of the variable-frequency water pump according to the outdoor environment temperature and the number of air conditioners in an embodiment of the control system of the one-to-multiple photovoltaic ice making and cold storage air conditioner of the invention.
Fig. 5 is a graph showing the running frequency of the variable-frequency water pump when the indoor temperature of each of 3 air-conditioning rooms with outdoor environment temperature within the range of 10-20 ℃ is disturbed during running in the embodiment of the one-to-many photovoltaic ice making cold storage air-conditioning control system.
Detailed Description
In order to make the use, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, for those skilled in the art, the air conditioner specifically includes a schematic structural diagram of an embodiment of the one-to-many photovoltaic ice making and cold storage air conditioner control system according to the present invention shown in fig. 3, and specifically includes a variable frequency water pump (1), a cold storage tank (2), an electronic control valve (3), an indoor fan (4), a temperature sensor (5), and an air conditioner controller (6).
A control method of an air conditioning system according to an embodiment of the present invention will be described with reference to fig. 1 to 2.
As shown in fig. 1 and 2, according to the control method of an air conditioning system in the embodiment of the present invention, the embodiment realizes the control of a variable frequency water pump (1), an electronic control valve (3) and an indoor fan (4) of a multi-split photovoltaic ice making and cold storage air conditioning control system, including the processes of performing down-regulation variable frequency water pump (1) operation control and electronic control valve (3) and indoor fan (4) operation control by a cooling cycle, specifically including the following steps:
step 100: detecting an outdoor environment temperature T0, comparing the detected outdoor environment temperature with set temperatures T1 and T2 or judging whether a user starts up, and entering a mode to operate when the outdoor environment temperature T0 is larger than the set temperature T1 or a user starting-up command is detected, wherein the variable-frequency water pump (1), the electronic regulating valve (3) and the indoor fan (4) are operated for a period of time in a first set operation state; specifically, the method comprises the following steps: the variable-frequency water pump (1) operates at a first set frequency, the corresponding throttling element electronic regulating valve Gn (3) is controlled to be opened at a first set opening, the corresponding indoor fan (4) is controlled to operate at a first set wind speed, a cooling medium passes through the variable-frequency water pump (1) and the throttling element electronic regulating valve (3) and absorbs heat through an indoor heat exchanger to cool indoor environment, when the variable-frequency water pump (1) operates at a high frequency, the cooling medium flow is large, the refrigerating effect of the air conditioner is good, when the variable-frequency water pump (1) operates at a low frequency, the cooling medium flow is small, and the refrigerating effect of the air conditioner is reduced. The operation mode is the operation state when the air conditioner is started, and the air conditioner controller (6) accurately controls the air conditioner based on the operation mode. Specifically, the outdoor ambient temperature T0 may be detected by the temperature sensor (5), and the set temperatures T1, T2 may be set to suitable temperatures manually due to demand.
Step 200: and in the first set running state, delaying for a period of time Tt, judging the outdoor environment temperature and the number of running air conditioners to determine the subinterval to which the variable-frequency water pump runs at the frequency corresponding to the subinterval to which the variable-frequency water pump belongs.
Step 300: comparing the detected indoor temperatures t1, t2 and t3 of each room with a set temperature ts, when the running indoor environment temperatures t1, t2 and t3 are larger than the set temperature ts, comparing the absolute value delta t of the difference values with the first set difference value delta t1, and when the absolute value delta t of the difference values is smaller than the first set difference value delta t1, indicating that the indoor temperature disturbance is not large, the comfort is not affected, keeping the electronic control valve (3) and the indoor fan (4) unchanged, returning to the step 200, and continuously executing circulation; when the absolute value delta t of the difference is larger than the first set difference delta t1, the indoor temperature is increased, the change amplitude is larger, and the comfort level of a human body is affected, so that the opening of the electronic regulating valve (3) is increased, the flow of a cooling medium is increased, the indoor fan (4) is accelerated, the indoor air flow rate is accelerated, and the refrigerating effect is improved.
Similarly, when the running indoor environment temperatures t1, t2 and t3 are smaller than the set temperature ts, comparing the absolute value Deltat of the difference value with the first set difference value Deltat 1, when the absolute value Deltat of the difference value is smaller than the first set difference value Deltat 1, indicating that the indoor temperature disturbance is not large and the comfort level is not affected, keeping the electronic regulating valve (3) and the indoor fan (4) unchanged, returning to the step 100, and continuously executing circulation; when the absolute value delta t of the difference is larger than the first set difference delta t1, the indoor temperature is reduced, the change range is larger, and the comfort level of a human body is influenced, so that the opening of the electronic regulating valve (3) is reduced, the flow of a cooling medium is reduced, the indoor fan (4) is decelerated, the flow rate of indoor air is slowed down, and the refrigerating effect is reduced.
Specifically, the set temperature ts and the first set difference Δt1 may be suitable temperatures manually set due to the demand.
Step 400: detecting the total sum Tm of indoor temperatures T1, T2 and T3 of all running rooms and comparing the total sum Tm with a set temperature Ts, when the total sum Tm of indoor environment temperatures of all running rooms is larger than the set temperature Ts, comparing the absolute value DeltaT of a difference value with the second set difference value DeltaT 1, and when the absolute value DeltaT of the difference value is larger than the second set difference value DeltaT 1, increasing the running frequency of the variable-frequency water pump (1) to accelerate the flow rate of a cooling medium so as to meet the requirement of all rooms on the refrigerating capacity; if not, keeping the operation frequency of the variable-frequency water pump unchanged, returning to the step 200, and continuously executing circulation;
similarly, when the sum Tm of the indoor environment temperatures of all the running rooms is smaller than the set temperature Ts, the absolute value DeltaT of the difference value is compared with the second set difference value DeltaT 1, and when the absolute value DeltaT of the difference value is larger than the second set difference value DeltaT 1, the running frequency of the variable-frequency water pump (1) is reduced, and the flow rate of the cooling medium is slowed down so as to meet the requirement of all the rooms on the refrigerating capacity; if not, the operation frequency of the variable-frequency water pump is kept unchanged, the step 200 is returned, and the circulation is continuously executed. Specifically, the set temperature Ts and the second set difference Δt1 may be suitable temperatures manually set due to the need.
And according to the fact that the detected outdoor environment temperature T0 is located in the set affiliated subinterval and the indoor environment temperature sum Tm of each room is located in the set affiliated subinterval, the operation frequency of the variable-frequency water pump (1) is controlled and regulated in a combined mode.
Further, when the variable-frequency water pump (1) is reduced to a frequency set value fmin, the variable-frequency water pump (1), the opening of the electronic regulating valve (3) and the rotating speed of the indoor fan (4) are all operated in the running state at the same time, and after a certain time delay, the variable-frequency water pump enters a buffering noise reduction stopping mode; if not, return to step 100 and continue the loop. That is, when the absolute value Δt of the difference is always smaller than the second set difference Δt1, the operating frequency of the variable frequency water pump (1) is gradually reduced until the operating frequency of the variable frequency water pump (1) is reduced to fmin, the variable frequency water pump (1) operates in a state in which the frequency, the opening of the electronic adjusting valve (3), and the rotational speed of the indoor fan (4) are all operated at the same time, and after a certain delay, the buffer noise reduction stop mode is entered.
Similarly, when the variable-frequency water pump (1) is raised to a frequency set value fmax, the frequency of the variable-frequency water pump (1), the opening of the electronic regulating valve (3) and the rotating speed of the indoor fan (4) all keep running in the running state at the last moment; if not, return to step 100 and continue the loop.
That is, when the absolute value Δt of the difference is always greater than the second set difference Δt1, the operation frequency of the variable frequency water pump (1) is gradually increased until the operation frequency of the variable frequency water pump (1) is increased to fmax, and the operation state operation at the last time is maintained by the frequency water pump frequency (1), the opening of the electronic adjusting valve (3), and the rotation speed of the indoor fan (4).
Step 500: after entering the buffer noise reduction stop mode, the method specifically further comprises the following steps:
the frequency of the variable-frequency water pump (1), the opening of the electronic regulating valve (3) and the indoor fan (4) are kept to run continuously at the previous moment, the running time is timed, and meanwhile, the running indoor environment temperatures t1 and t2 and the like are obtained; when the running time does not reach the set time, if any indoor environment temperature tn meets a stop condition, controlling the opening of the corresponding electronic regulating valve (3) to be reduced, stopping running of the corresponding indoor fan (4), and correspondingly reducing the running frequency partition of the variable-frequency water pump (1), if not, running the opening of the corresponding electronic regulating valve (3) and the indoor fan (4) in a first set running state; if the running time reaches the set time, the opening of the corresponding electronic regulating valve (3) and the indoor fan (4) continue to run in a first set running state; the opening of the electronic regulating valve (3) and the indoor fan (4) continue to operate for a period of time in a first set operation state, when the set operation time is not reached, each indoor environment temperature is obtained, if any indoor environment temperature tn meets a stop condition, the opening of the corresponding electronic regulating valve (3) is controlled to be reduced, the corresponding indoor fan (4) stops operating, and the operation frequency of the variable-frequency water pump (1) is correspondingly reduced in a partitioned mode; if not, when the running time reaches the set running time, controlling the opening degree of the corresponding electronic regulating valve (3) to be reduced, stopping running the corresponding indoor fan (4), and stopping running the variable-frequency water pump (1).
Specifically, in any step, if any room detects a user shutdown command, the noise reduction buffer stop mode is entered.
For example, the outdoor power-on temperature T1 is 24 ℃, the outdoor power-off temperature T2 is 20 ℃, and the running time Tt is set to 5min; when the outdoor temperature reaches 24 ℃ or the user-defined startup is performed, the system enters a first operation mode, the operation mode is a low consumption mode, specifically, the opening of the throttle element electronic regulating valve (3) is 120 steps, the rotating speed of the indoor fan (4) is 600r/min, the operation frequency of the variable-frequency water pump (1) is in one-to-one correspondence with the operation number of the indoor air conditioner and the subinterval of the outdoor environment, and the operation frequency of the variable-frequency water pump (1) is correspondingly changed along with the change of the outdoor temperature and the operation number of the air conditioner, as shown in fig. 4. After 5min of operation, the indoor temperature tn is compared with the indoor set temperature, the indoor set temperature ts is assumed to be 24 ℃ (the temperature is a variable value and can be a comfortable temperature of a human body), the set difference temperature is 2 ℃, when the indoor temperature tn is higher than the set temperature ts and exceeds 2 ℃, the opening of the electronic regulating valve (3) is increased by 10 openings, the indoor fan (4) is accelerated by 30r/min, the electronic regulating valve (3) circulates once every 5min, if the indoor temperature is still higher than 2 ℃ after 5min, the opening of the electronic regulating valve (3) is continuously increased by 10 openings, and the indoor fan (4) is continuously accelerated by 30 r/min. The variable-frequency water pump (1) operates on the basis of fig. 4, for example, as shown in fig. 5, when the operation state is 3 air conditioners in operation, the outdoor environment is 20 ℃, the operation frequency of the variable-frequency water pump is 45Hz, the variable-frequency water pump (1) can be operated between 30 Hz and 75Hz due to the disturbance of the indoor temperature, for 3 air conditioners in operation, once every 5min, if the temperature is reduced and the indoor set temperature exceeds 2 ℃, the opening of the electronic regulating valve (3) is reduced by 10 openings, the indoor fan (4) is decelerated by 30r/min, the operation frequency of the variable-frequency water pump (1) is reduced by 9Hz, once every 5min is circulated, if the temperature is still lower than the set temperature and exceeds 2 ℃ after 5min, the opening of the electronic regulating valve (3) is continuously reduced by 10 openings, the indoor fan (4) is continuously decelerated by 30r/min, and the variable-frequency water pump (1) is continuously reduced by 9Hz. Assuming that the lowest running frequency fmin of the variable-frequency water pump is 10Hz, the highest running frequency fmax is 165Hz, for a single room, when the running frequency of the variable-frequency water pump (1) is lower than the lowest running frequency fmin, the single room enters a buffering noise reduction mode, the indoor fan (4), the electronic regulating valve (3) and the like keep running in the running state at the last moment, the indoor temperature is obtained, when the indoor temperature reaches the set temperature, the indoor fan (4) is stopped, and if the indoor temperature does not meet the stopping condition, the variable-frequency water pump (1) stops running after the continuous running for 5 min.
Claims (3)
1. The control method of the one-to-many photovoltaic ice making cold accumulation air conditioner is characterized by comprising the following processes of performing down-regulation variable-frequency water pump operation control, electronic regulating valve and indoor fan operation control by a cold supply cycle: the air conditioner detects an opening operation condition and enters a selected operation mode;
step 100: detecting an outdoor environment temperature T0; the starting operation condition is to detect the outdoor temperature T0, compare the outdoor environment temperature T0 with the set temperatures T1 and T2 or judge whether the user starts up or not, if yes, start up and enter the corresponding mode operation, if no, continue the comparison; the outdoor environment temperature T0 is compared with the set temperatures T1 and T2, and specifically includes: when the outdoor environment temperature T0 is detected to be greater than the set temperature T1, entering an operation mode; when the outdoor environment temperature is detected to be less than T2, a buffer noise reduction stopping mode is entered;
step 200: in the operation mode, detecting the outdoor environment temperature T0, comparing the outdoor environment temperature T0 with a set temperature range [ T11, T22] to determine a subinterval to which the outdoor environment temperature T0 belongs, combining the running number of indoor air conditioners, and determining an operation interval of the running frequency of the variable-frequency water pump by combining the two;
step 300: detecting the temperature t1, t2 and the like of each running room, comparing the temperature of each running room with a set temperature ts, and adjusting the opening of an electronic regulating valve Gn of a corresponding throttling element and the wind speed of a corresponding indoor fan according to the difference value of the indoor temperature of each room and the set temperature ts; after detecting the temperatures t1, t2, etc. of the respective rooms that have been operated, the method specifically further comprises the following steps:
when the running indoor environment temperatures t1 and t2 are larger than the set temperature ts, the absolute value delta t of the difference between the indoor environment temperatures t1 and t2 and the set temperature ts is compared with a first set difference delta t1, when the absolute value delta t of the difference is larger than the first set difference delta t1, the opening of the electronic regulating valve is increased, the indoor fan is accelerated, and when the absolute value delta t of the difference is smaller than or equal to the first set difference delta t1, the opening of the electronic regulating valve and the indoor fan are kept unchanged; when the running indoor environment temperatures t1 and t2 are smaller than the set temperature ts, the absolute value delta t of the difference between the indoor environment temperatures t1 and t2 and the set temperature ts is compared with a first set difference delta t1, when the absolute value delta t of the difference is larger than the first set difference delta t1, the opening of the electronic regulating valve is reduced, the indoor fan is decelerated, and when the absolute value delta t of the difference is smaller than the first set difference delta t1, the opening of the electronic regulating valve and the indoor fan are kept unchanged;
further, the method comprises the steps that the absolute value DeltaT of the difference value between the sum Tm of the indoor temperatures T1, T2 and the like of all the running rooms and the set temperature Ts is compared with a second set difference DeltaT 1, and when the absolute value DeltaT of the difference value is smaller than the second set difference DeltaT 1, the running frequency of the variable frequency water pump is reduced; when the absolute value delta T of the difference value is larger than a first set difference value delta T1, reducing the running frequency of the variable frequency water pump; if not, continuously comparing the indoor environment temperatures t1, t2 and the like with the set temperature ts;
step 400: detecting the total sum Tm of the indoor temperatures t1, t2 and the like of each running room, comparing the total sum Tm of the indoor temperatures t1, t2 and the like of each running room with a set temperature Ts, and adjusting the running frequency of the variable-frequency water pump in the running interval of the running frequency of the variable-frequency water pump according to the difference value of the total sum Tm of the indoor temperatures t1, t2 and the like of each running room and the set temperature Ts;
and when the operation stopping condition is detected, entering a buffer noise reduction stopping mode.
2. The control method of a one-to-many photovoltaic ice making cold storage air conditioner according to claim 1, wherein after controlling the opening degree of the electronic regulating valve, the rotational speed of the indoor fan and the operation frequency of the variable frequency water pump, the method specifically further comprises the following steps:
when the variable-frequency water pump is lower than a frequency set value fmin, the variable-frequency water pump operates in a running state at the moment, and after a certain time delay, the variable-frequency water pump enters a buffering noise reduction stopping mode;
when the variable-frequency water pump is higher than the frequency set value fmax, the variable-frequency water pump operates in a running state at the moment, wherein the frequency of the variable-frequency water pump, the opening of the electronic regulating valve and the rotating speed of the indoor fan are all higher than the moment.
3. The method for controlling a multi-split photovoltaic ice making cold storage air conditioner according to claim 1, wherein after entering a buffering noise reduction stop mode, the method specifically further comprises the following steps:
step 500: the frequency of the variable-frequency water pump, the opening of the electronic regulating valve and the wind speed of the indoor fan are kept to run continuously at the previous moment, the running time is timed, and meanwhile, all running indoor environment temperatures t1, t2 and the like are obtained; when the running time does not reach the set time, if any indoor environment temperature tn meets a stop condition, controlling the opening of the corresponding electronic regulating valve to be reduced, stopping running of the corresponding indoor fan, correspondingly reducing the running frequency partition of the variable-frequency water pump, and if not, running the opening of the corresponding electronic regulating valve and the indoor fan in a first set running state;
timing the operation time, acquiring each indoor environment temperature if the operation time does not reach the set operation time, and controlling the opening of the corresponding electronic regulating valve to be reduced if any indoor environment temperature tn meets the stop condition, wherein the corresponding indoor fan stops operating, and the operation frequency of the variable-frequency water pump is correspondingly reduced in a partition mode; if not, when the running time reaches the set running time, controlling the opening of the corresponding electronic regulating valve to be reduced, stopping running the corresponding indoor fan, and correspondingly reducing the running frequency of the variable-frequency water pump in a partitioned mode.
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| CN108061344A (en) * | 2017-11-22 | 2018-05-22 | 国网湖北省电力有限公司 | A kind of optimal coordinated control system and method for distribution family photovoltaic+ice cold-storage |
| CN108032707B (en) * | 2017-12-29 | 2021-03-02 | 北汽（常州）汽车有限公司 | Power-off control method for air conditioning system of pure electric vehicle |
| CN110274361B (en) * | 2019-06-21 | 2020-09-01 | 珠海格力电器股份有限公司 | Water multi-connected air conditioning system and control method of variable-frequency water pump thereof |
| CN112033077B (en) * | 2020-08-26 | 2021-07-20 | 珠海格力电器股份有限公司 | Ice storage system and control method thereof |
| CN112682913B (en) * | 2020-12-18 | 2022-07-26 | 广东申菱环境系统股份有限公司 | Control method of ice storage air conditioner |
| CN112682911B (en) * | 2020-12-18 | 2022-07-26 | 广东申菱环境系统股份有限公司 | Control method of ice storage air conditioner based on spray heat exchange |
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| CN112682914B (en) * | 2020-12-18 | 2022-07-26 | 广东申菱环境系统股份有限公司 | Control method of ice storage mobile air conditioner |
| CN113357722A (en) * | 2021-05-20 | 2021-09-07 | 青岛海尔空调器有限总公司 | Heating air conditioning fan and control method |
| CN113339906B (en) * | 2021-05-27 | 2022-07-15 | 青岛海尔空调器有限总公司 | Cold accumulation type air conditioning fan and control method thereof |
| CN114198877B (en) * | 2021-12-17 | 2023-09-22 | 珠海拓芯科技有限公司 | Energy-saving control method and device for variable frequency air conditioner, air conditioner and storage medium |
| CN114777237B (en) * | 2022-05-05 | 2024-05-28 | 美的集团武汉制冷设备有限公司 | Air conditioner control method, air conditioner and computer readable storage medium |
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