CN114183810B - Control system for intelligent combination and distribution of multiple energy sources - Google Patents
Control system for intelligent combination and distribution of multiple energy sources Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- 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
- F24F11/85—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 variable-flow pumps
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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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/20—Heat-exchange fluid temperature
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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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention belongs to the technical field of geothermal and constant-temperature circulating systems, in particular to a multi-energy intelligent combined and distributed control system which comprises a circulating waterway, a main energy waterway and an auxiliary energy waterway, wherein the control method comprises the following steps: A. starting a control system; B. judging the T loop and the T set; C. the main energy electromagnetic valve is kept in an open state; D. the circulating water pump operates and reads the flow Q; E. judging the actual power and the set power: e1, when the actual power is less than the set power, opening an auxiliary energy electromagnetic valve, and re-entering the step B; e2, when the actual power is more than or equal to the set power, adjusting the output power of the circulating water pump or returning to the step B; the invention can be applied to a heating system and a refrigerating system, adopts the main energy waterway and the auxiliary energy waterway to perform heat exchange together as a circulating waterway, reasonably controls the auxiliary energy waterway to perform heat exchange when the main energy waterway is insufficient in heat supply or cold supply, and further achieves the purpose of keeping the water temperature in the circulating waterway constant.
Description
Technical field:
the invention belongs to the technical field of geothermal and constant-temperature circulating systems, and particularly relates to a control system for intelligent combination and distribution of multiple energy sources.
The background technology is as follows:
under the global energy command, low carbon emission is required, various green energy sources such as solar energy, hydrogen energy and the like are utilized, and the energy sources are independent and lack of an intelligent control system for combination according to emission level and economical principle.
In the northern floor heating system in China, low energy consumption sources such as central heating or solar heating mainly take hot water with the temperature not higher than 60 ℃ as heating media, and the hot water flows into a heating pipe in an indoor circulating waterway and circularly flows to heat floors, so that heat is supplied to the indoor in a radiation and convection heat transfer mode. Whether the low-energy consumption source supplies heat is determined according to the external temperature, namely, when the external temperature is greater than a specified threshold value, heat supply is stopped or insufficient, so that residents have temperature drops. In autumn, the outside temperature can float up and down at a specified threshold value, so that heat supply is frequently interrupted due to low energy consumption, the temperature in a circulating waterway is high and low, and discomfort of residents is caused by temperature drop, so that the life quality and comfort of the residents are seriously affected.
Meanwhile, in the south of China, when the summer is hot, a fresh air system or a constant temperature system is independently arranged in each household, and refrigeration is provided for the indoor by means of heat exchange flow of refrigerating fluid in a refrigerating machine in a circulating waterway; however, how to use clean and low-carbon energy such as solar energy as a preferential energy source, and to use commercial power as an auxiliary energy source when the refrigeration is insufficient. On the premise of ensuring the use requirement of users, how to economically use energy, and reduce carbon and emission as much as possible.
The invention comprises the following steps:
the invention aims to provide a multi-energy intelligent combined and distributed control system which can supply heat and refrigerate, performs heat exchange for a circulating water channel by means of a main energy water channel and an auxiliary energy water channel, and reasonably controls the auxiliary energy water channel to perform heat exchange when the main energy water channel is insufficient in heat supply or cold supply by detecting the water temperature in the circulating water channel and controlling the working state of a circulating water pump so as to enable the water temperature in the circulating water channel to achieve constant temperature.
The main energy and the auxiliary energy of the control system can be of a plurality of energy types, including municipal central heating, wall-mounted furnaces, solar energy, municipal electric energy, hydrogen energy and the like, when the control system needs high temperature and constant temperature, the central heating is adopted as the main energy, the wall-mounted furnaces are adopted as the auxiliary energy, and under the condition of insufficient central heating, the wall-mounted furnaces are adopted as the auxiliary energy to supplement heat; when the control system of the invention needs to perform low temperature constant temperature, namely, solar energy is used as a main energy source, the solar energy is converted into electric energy to drive the refrigerator, refrigeration is realized by virtue of the radiating fins arranged on the circulating water path, and municipal electric energy is used as an auxiliary energy source to further improve the refrigeration efficiency under the condition of insufficient solar energy refrigeration. Therefore, the control system of the invention combines a plurality of energy sources, thereby reasonably selecting different energy sources to respectively act on the main energy source and the auxiliary energy source according to the emission level and the economy of the energy sources so as to realize the constant temperature purpose of heating or refrigerating.
The invention is realized in the following way:
the utility model provides a control system that multipotency source intelligence allies oneself with, distributes, including the circulation water route, and can carry out heat exchange's main energy water route and auxiliary energy water route with the circulation water route, be provided with main energy solenoid valve on the main energy water route, be provided with auxiliary energy solenoid valve on the auxiliary energy water route, be equipped with circulating water pump on the circulation water route, control method includes following steps in proper order:
A. setting the water temperature of the water outlet of a preset circulating waterway as Tset, the water temperature of the water outlet of an actual circulating waterway as Tout, the return difference temperature as Tdifference, the waiting time as T and the like, and the stabilizing time as T steady, and starting a control system;
B. detecting the temperature at the backwater end of the circulating water pump at the moment by means of a temperature sensor to obtain T return, and judging the T return and T set size:
b1, when T returns to be more than or equal to T is set:
b1-1, if the auxiliary energy electromagnetic valve is opened, closing the auxiliary energy electromagnetic valve, and re-entering the step B after keeping t and the like;
b1-2, if the auxiliary energy electromagnetic valve is closed and the main energy electromagnetic valve is opened, closing the main energy electromagnetic valve and the circulating water pump, and re-entering the step B until T returns to be less than T;
b2, when T returns to < T is set:
b2-1, if T is set to be the difference of T and is more than T, turning off the water pump and waiting for T and the like, and re-entering the step B;
b2-2, if T is set to be less than or equal to T return, entering the next step;
C. the main energy electromagnetic valve is kept in an open state, the circulating water pump is a variable frequency pump, and the circulating water pump is kept to run at maximum output power PWM;
D. after the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, namely the actual power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, adjusting the output power PWM of the circulating water pump to achieve the actual required water flow, and until the actual power=the set power;
or (b)
C. The main energy electromagnetic valve is kept in an open state, the circulating water pump is not a variable frequency pump, and the circulating water pump is kept to operate at normal power;
D. after the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, namely the actual power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, re-entering the step B.
In the control system for intelligent combination and distribution of multiple energy sources, the steps A and B further sequentially comprise the following steps:
F. the system in the circulation water path is filled with water, and the temperature sensor is used for detecting the water temperature in the circulation water path at the moment:
f1, when the water temperature is less than or equal to 4 ℃, the whole water enters a standby state or the circulating water pump is not powered, and the step F is restarted;
f2, when the water temperature is more than 4 ℃, entering the step G;
G. detecting the actual water pressure in the circulating waterway by means of the pressure sensor, and judging whether the actual water pressure reaches the rated water pressure or not:
g1, when the actual water pressure is more than or equal to the rated water pressure, entering a step B;
g2, when the actual water pressure is less than the rated water pressure:
g2-1, closing a water supplementing valve and giving a water leakage alarm if the water supplementing time exceeds the rated time;
g2-2, if the water replenishing time does not reach the rated time, opening a water replenishing valve, and detecting the actual flow in the circulating waterway by means of a flow sensor:
g2-2-1, when the actual flow is 0, closing the water supplementing valve and blocking and alarming;
g2-2-2, when the actual flow is greater than 0, continuously supplementing water and waiting for a certain time, detecting whether the water pressure in the circulating waterway is increased or not by means of a pressure sensor, and if the water pressure is not increased, closing a water supplementing valve and giving a water leakage alarm; if the water pressure increases, the step F is re-entered.
In the control system for intelligent multi-energy combination and distribution, rated time in the step G2-1 and the step G2-2 is 24-72h.
In the control system for intelligent multi-energy combination and distribution, the continuous water supplementing waiting time in the step G2-2-2 is 10-30s.
In the control system for intelligent combination and distribution of multiple energy sources, the steps B and C further sequentially comprise the following steps:
H. detecting the working state of a circulating water pump:
h1, when the circulating water pump is in a starting state, detecting the actual flow in the circulating water channel at the moment by means of a flow sensor:
h1-1, if the actual flow is 0, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h1-2, if the actual flow is greater than 0, entering a step C;
and H2, when the circulating water pump is in a stop state, respectively detecting the pressure of the water outlet end and the pressure of the water return end of the circulating water pump at the moment by means of a pressure sensor, and obtaining P output and P return:
h2-1, if the P outlet is not equal to the P return, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h2-2, if pout=pback, go to step C.
In the control system for intelligent combination and distribution of multiple energy sources, the steps C and D further sequentially comprise the following steps:
I. detecting the actual flow in the circulating waterway by means of a flow sensor:
i1-1, when the actual flow is less than the minimum protection flow of the circulating water pump:
i1-1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and alarming when the flow is smaller;
i1-1-2, if the flow is smaller than or equal to 30 times in 24 hours, the flow is smaller than or equal to N=N+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
and I1-2, when the actual flow is not less than the minimum protection flow of the circulating water pump, returning to zero for a small number of times N, and entering the step D.
In the control system for intelligent multi-energy combination and distribution, the water temperature T of the set circulating waterway is set to be 27-33 ℃, the return difference temperature T is set to be 3-7 ℃, the waiting time T and the like are 15-30s, and the stabilizing time T is set to be 15-30s.
In the control system for intelligent multi-energy combination and distribution, the rated pressure in the step G is 0.6-1.0bar.
In the control system for intelligent multi-energy combination and distribution, the minimum protection flow of the circulating water pump in the step I is 2.5-3.5L/min.
Compared with the prior art, the invention has the outstanding advantages that:
the invention can be applied to a heating system in the north and a refrigerating system in the south, adopts the main energy waterway and the auxiliary energy waterway to perform heat exchange together as a circulating waterway, and reasonably controls the auxiliary energy waterway to perform heat exchange when the main energy waterway is insufficient in heat supply or cold supply by detecting the water temperature in the circulating waterway and controlling the working state of the circulating water pump, thereby achieving the purpose of keeping the water temperature in the circulating waterway constant.
Description of the drawings:
fig. 1 is a logic diagram of a combination of embodiment one and embodiment two of the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to fig. 1 by way of specific examples:
embodiment one:
the embodiment is applied to a geothermal system, and the circulating waterway is a geothermal waterway.
The invention discloses a control system for intelligent combination and distribution of multiple energy sources, which comprises a circulating water channel, and a main energy source water channel and an auxiliary energy source water channel which can perform heat exchange with the circulating water channel, wherein a main energy source electromagnetic valve is arranged on the main energy source water channel, an auxiliary energy source electromagnetic valve is arranged on the auxiliary energy source water channel, and a circulating water pump is arranged on the circulating water channel.
The control method sequentially comprises the following steps:
A. setting the water temperature of the water outlet of a preset circulating waterway as Tset, the water temperature of the water outlet of an actual circulating waterway as Tout, the return difference temperature as Tdifference, the waiting time as T and the like, and the stabilizing time as T steady, and starting a control system; wherein the water temperature T of the set circulating water path is set to be 27-33 ℃, the return difference temperature T is 3-7 ℃, the waiting time T and the like are 15-30s, and the stabilizing time T is stable to be 15-30s. In this embodiment, T is set to 30 ℃, the difference between T and T is 5 ℃, T is 20s, and T is stable to 20s.
In order to maintain a certain water pressure in the circulating waterway and detect that the circulating waterway is blocked or leaked. The method comprises the following steps of:
F. the system in the circulation water path is filled with water, and the temperature sensor is used for detecting the water temperature in the circulation water path at the moment:
f1, when the water temperature is less than or equal to 4 ℃, the whole water enters a standby state or the circulating water pump is not powered, and the step F is restarted; i.e. having a low temperature protection function, in this embodiment, the system will also show a low temperature protection; meanwhile, in order to prevent the liquid in the circulating waterway from being frozen, an antifreezing agent is doped in the liquid in the circulating waterway, and when the water temperature in the circulating waterway is at a low temperature, the circulating water pump is not required to work continuously, and the low-temperature protection can be released after the external liquid enters the circulating waterway to raise the temperature.
F2, when the water temperature is more than 4 ℃, entering the step G;
G. detecting the actual water pressure in the circulating waterway by means of the pressure sensor, and judging whether the actual water pressure reaches the rated water pressure or not:
g1, when the actual water pressure is more than or equal to the rated water pressure, entering a step B; wherein the rated pressure is 0.6-1.0bar. Whereas in this example the nominal pressure is 0.8bar.
G2, when the actual water pressure is less than the rated water pressure:
g2-1, closing a water supplementing valve and giving a water leakage alarm if the water supplementing time exceeds the rated time; wherein the rated time can be 24-72h.
G2-2, if the water replenishing time does not reach the rated time, opening a water replenishing valve, and detecting the actual flow in the circulating waterway by means of a flow sensor:
g2-2-1, when the actual flow is 0, closing the water supplementing valve and blocking and alarming;
g2-2-2, when the actual flow is greater than 0, continuously supplementing water and waiting for a certain time, detecting whether the water pressure in the circulating waterway is increased or not by means of a pressure sensor, and if the water pressure is not increased, closing a water supplementing valve and giving a water leakage alarm; if the water pressure increases, the step F is re-entered. And the continuous water replenishing waiting time is 10-30s.
B. Detecting the temperature at the backwater end of the circulating water pump at the moment by means of a temperature sensor to obtain T return, and judging the T return and T set size:
b1, when T returns to be more than or equal to T is set:
b1-1, if the auxiliary energy electromagnetic valve is opened, closing the auxiliary energy electromagnetic valve, and re-entering the step B after keeping t and the like;
b1-2, if the auxiliary energy electromagnetic valve is closed and the main energy electromagnetic valve is opened, closing the main energy electromagnetic valve and the circulating water pump, and re-entering the step B until T returns to be less than T; that is, the temperature is too high, and the auxiliary energy electromagnetic valve or the main energy electromagnetic valve is closed to keep the water temperature in the circulating water path in a constant temperature state.
B2, when T returns to < T is set:
b2-1, if T is set to be the difference of T and is more than T, turning off the water pump and waiting for T and the like, and re-entering the step B; when the temperature of the T loop is too low, the main energy waterway or the main energy waterway and the auxiliary energy waterway are used for heat exchange together to improve the water temperature of the circulating waterway by closing the circulating water pump.
B2-2, if T is set to be less than or equal to T return, entering the next step;
the step B and the step C also sequentially comprise the following steps:
H. detecting the working state of a circulating water pump:
h1, when the circulating water pump is in a starting state, detecting the actual flow in the circulating water channel at the moment by means of a flow sensor:
h1-1, if the actual flow is 0, turning off the water pump and waiting for t and the like, and then re-entering the step B; the circulating water pump is turned off to save energy waste.
H1-2, if the actual flow is greater than 0, entering a step C;
and H2, when the circulating water pump is in a stop state, respectively detecting the pressure of the water outlet end and the pressure of the water return end of the circulating water pump at the moment by means of a pressure sensor, and obtaining P output and P return:
h2-1, if the P outlet is not equal to the P return, turning off the water pump and waiting for t and the like, and then re-entering the step B; the circulating water pump is turned off to save energy waste.
H2-2, if pout=pback, go to step C.
C. The main energy electromagnetic valve is kept in an open state, the circulating water pump is a variable frequency pump, and the circulating water pump is kept to run at maximum output power PWM;
the method comprises the following steps of:
I. detecting the actual flow in the circulating waterway by means of a flow sensor:
i1-1, when the actual flow is less than the minimum protection flow of the circulating water pump: and the minimum protection flow of the circulating water pump can be 2.5-3.5L/min.
I1-1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and alarming when the flow is smaller; namely, the existence of a blockage problem in the geothermal water pipe is detected.
I1-1-2, if the flow is smaller than or equal to 30 times in 24 hours, the flow is smaller than or equal to N=N+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
and I1-2, when the actual flow is not less than the minimum protection flow of the circulating water pump, returning to zero for a small number of times N, and entering the step D.
D. After the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, wherein the calculation of the power involves a fixed coefficient, and the actual power is offset under the ratio of the actual power and the set power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, adjusting the output power PWM of the circulating water pump to achieve the actual required water flow, and until the actual power=the set power;
embodiment two:
this embodiment is substantially the same as the first embodiment described above, with the main differences: the circulating water pump adopts the existing common water pump instead of the variable frequency pump; the control method comprises the following steps:
A. setting the water temperature of the water outlet of a preset circulating waterway as Tset, the water temperature of the water outlet of an actual circulating waterway as Tout, the return difference temperature as Tdifference, the waiting time as T and the like, and the stabilizing time as T steady, and starting a control system;
the method comprises the following steps of:
F. the system in the circulation water path is filled with water, and the temperature sensor is used for detecting the water temperature in the circulation water path at the moment:
f1, when the water temperature is less than or equal to 4 ℃, the whole water enters a standby state or the circulating water pump is not powered, and the step F is restarted;
f2, when the water temperature is more than 4 ℃, entering the step G;
G. detecting the actual water pressure in the circulating waterway by means of the pressure sensor, and judging whether the actual water pressure reaches the rated water pressure or not:
g1, when the actual water pressure is more than or equal to the rated water pressure, entering a step B;
g2, when the actual water pressure is less than the rated water pressure:
g2-1, closing a water supplementing valve and giving a water leakage alarm if the water supplementing time exceeds the rated time;
g2-2, if the water replenishing time does not reach the rated time, opening a water replenishing valve, and detecting the actual flow in the circulating waterway by means of a flow sensor:
g2-2-1, when the actual flow is 0, closing the water supplementing valve and blocking and alarming;
g2-2-2, when the actual flow is greater than 0, continuously supplementing water and waiting for a certain time, detecting whether the water pressure in the circulating waterway is increased or not by means of a pressure sensor, and if the water pressure is not increased, closing a water supplementing valve and giving a water leakage alarm; if the water pressure increases, the step F is re-entered.
B. Detecting the temperature at the backwater end of the circulating water pump at the moment by means of a temperature sensor so as to obtain T return:
b1, when T returns to be more than or equal to T is set:
b1-1, if the auxiliary energy electromagnetic valve is opened, closing the auxiliary energy electromagnetic valve, and re-entering the step B after keeping t and the like;
b1-2, if the auxiliary energy electromagnetic valve is closed and the main energy electromagnetic valve is opened, closing the main energy electromagnetic valve and the circulating water pump, and re-entering the step B until T returns to be less than T;
b2, when T returns to < T is set:
b2-1, if T is set to be the difference of T and is more than T, turning off the water pump and waiting for T and the like, and re-entering the step B;
b2-2, if T is set to be less than or equal to T return, entering the next step;
the step B and the step C also sequentially comprise the following steps:
H. detecting the working state of a circulating water pump:
h1, when the circulating water pump is in a starting state, detecting the actual flow in the circulating water channel at the moment by means of a flow sensor:
h1-1, if the actual flow is 0, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h1-2, if the actual flow is greater than 0, entering a step C;
and H2, when the circulating water pump is in a stop state, respectively detecting the pressure of the water outlet end and the pressure of the water return end of the circulating water pump at the moment by means of a pressure sensor, and obtaining P output and P return:
h2-1, if the P outlet is not equal to the P return, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h2-2, if pout=pback, go to step C.
C. The main energy electromagnetic valve is kept in an open state, the circulating water pump is not a variable frequency pump, and the circulating water pump is kept to operate at normal power;
the method comprises the following steps of:
I. detecting the actual flow in the circulating waterway by means of a flow sensor:
i1-1, when the actual flow is less than the minimum protection flow of the circulating water pump:
i1-1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and alarming when the flow is smaller;
i1-1-2, if the flow is smaller than or equal to 30 times in 24 hours, the flow is smaller than or equal to N=N+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
and I1-2, when the actual flow is not less than the minimum protection flow of the circulating water pump, returning to zero for a small number of times N, and entering the step D.
D. After the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, namely the actual power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, re-entering the step B.
The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, therefore: all equivalent changes in shape, structure and principle of the invention should be covered in the scope of protection of the invention.
Claims (9)
1. A control system for intelligent combination and distribution of multiple energy sources is characterized in that: the control method comprises the following steps of:
A. setting the water temperature of the water outlet of a preset circulating waterway as Tset, the water temperature of the water outlet of an actual circulating waterway as Tout, the return difference temperature as Tdifference, the waiting time as T and the like, and the stabilizing time as T steady, and starting a control system;
B. detecting the temperature at the backwater end of the circulating water pump at the moment by means of a temperature sensor to obtain T return, and judging the T return and T set size:
b1, when T returns to be more than or equal to T is set:
b1-1, if the auxiliary energy electromagnetic valve is opened, closing the auxiliary energy electromagnetic valve, and re-entering the step B after keeping t and the like;
b1-2, if the auxiliary energy electromagnetic valve is closed and the main energy electromagnetic valve is opened, closing the main energy electromagnetic valve and the circulating water pump, and re-entering the step B until T returns to be less than T;
b2, when T returns to < T is set:
b2-1, if T is set to be the difference of T and is more than T, turning off the water pump and waiting for T and the like, and re-entering the step B;
b2-2, if T is set to be less than or equal to T return, entering the next step;
C. the main energy electromagnetic valve is kept in an open state, the circulating water pump is a variable frequency pump, and the circulating water pump is kept to run at maximum output power PWM;
D. after the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, namely the actual power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, adjusting the output power PWM of the circulating water pump to achieve the actual required water flow, and until the actual power=the set power;
or (b)
C. The main energy electromagnetic valve is kept in an open state, the circulating water pump is not a variable frequency pump, and the circulating water pump is kept to operate at normal power;
D. after the circulating water pump continuously runs t steadily, the flow Q in the circulating water channel is read by means of a flow meter, and the ratio between the actual power and the set power is calculated, namely the actual power: set power= (T out-T back)/Q: (Tset-Tback)/Q;
E. judging the actual power and the set power:
e1, when the actual power is smaller than the set power, opening an auxiliary energy electromagnetic valve and a temperature sensor arranged indoors, controlling the auxiliary energy to work by a control assembly according to signals of the temperature sensor, and re-entering the step B;
e2, when the actual power is more than or equal to the set power, re-entering the step B.
2. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: the method comprises the following steps of:
F. the system in the circulation water path is filled with water, and the temperature sensor is used for detecting the water temperature in the circulation water path at the moment:
f1, when the water temperature is less than or equal to 4 ℃, the whole water enters a standby state or the circulating water pump is not powered, and the step F is restarted;
f2, when the water temperature is more than 4 ℃, entering the step G;
G. detecting the actual water pressure in the circulating waterway by means of the pressure sensor, and judging whether the actual water pressure reaches the rated water pressure or not:
g1, when the actual water pressure is more than or equal to the rated water pressure, entering a step B;
g2, when the actual water pressure is less than the rated water pressure:
g2-1, closing a water supplementing valve and giving a water leakage alarm if the water supplementing time exceeds the rated time;
g2-2, if the water replenishing time does not reach the rated time, opening a water replenishing valve, and detecting the actual flow in the circulating waterway by means of a flow sensor:
g2-2-1, when the actual flow is 0, closing the water supplementing valve and blocking and alarming;
g2-2-2, when the actual flow is greater than 0, continuously supplementing water and waiting for a certain time, detecting whether the water pressure in the circulating waterway is increased or not by means of a pressure sensor, and if the water pressure is not increased, closing a water supplementing valve and giving a water leakage alarm; if the water pressure increases, the step F is re-entered.
3. The multi-energy intelligent combined and distributed control system according to claim 2, wherein: the rated time in the step G2-1 and the step G2-2 is 24-72h.
4. The multi-energy intelligent combined and distributed control system according to claim 2, wherein: and the continuous water supplementing waiting time in the step G2-2-2 is 10-30s.
5. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: the step B and the step C also sequentially comprise the following steps:
H. detecting the working state of a circulating water pump:
h1, when the circulating water pump is in a starting state, detecting the actual flow in the circulating water channel at the moment by means of a flow sensor:
h1-1, if the actual flow is 0, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h1-2, if the actual flow is greater than 0, entering a step C;
and H2, when the circulating water pump is in a stop state, respectively detecting the pressure of the water outlet end and the pressure of the water return end of the circulating water pump at the moment by means of a pressure sensor, and obtaining P output and P return:
h2-1, if the P outlet is not equal to the P return, turning off the water pump and waiting for t and the like, and then re-entering the step B;
h2-2, if pout=pback, go to step C.
6. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: the method comprises the following steps of:
I. detecting the actual flow in the circulating waterway by means of a flow sensor:
i1-1, when the actual flow is less than the minimum protection flow of the circulating water pump:
i1-1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and alarming when the flow is smaller;
i1-1-2, if the flow is smaller than or equal to 30 times in 24 hours, the flow is smaller than or equal to N=N+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
and I1-2, when the actual flow is not less than the minimum protection flow of the circulating water pump, returning to zero for a small number of times N, and entering the step D.
7. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: the water temperature T of the set circulating waterway is set to be 27-33 ℃, the return difference temperature T is 3-7 ℃, the waiting time T and the like are 15-30s, and the stabilizing time T is stable to be 15-30s.
8. The multi-energy intelligent combined and distributed control system according to claim 2, wherein: the nominal pressure in step G is 0.6-1.0bar.
9. The multi-energy intelligent combined and distributed control system according to claim 6, wherein: and (3) the minimum protection flow of the circulating water pump in the step I is 2.5-3.5L/min.
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| CN103185372B (en) * | 2013-04-03 | 2015-06-10 | 谷振宇 | Internet of things heating and air conditioning energy-saving water-saving control system |
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| CN209147206U (en) * | 2018-08-31 | 2019-07-23 | 北京北环新工科技有限公司 | A kind of combined heating system |
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