CN117091195A - Operation regulation and control system and method based on room temperature control and quantity regulation - Google Patents
Operation regulation and control system and method based on room temperature control and quantity regulation Download PDFInfo
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- CN117091195A CN117091195A CN202310905182.6A CN202310905182A CN117091195A CN 117091195 A CN117091195 A CN 117091195A CN 202310905182 A CN202310905182 A CN 202310905182A CN 117091195 A CN117091195 A CN 117091195A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 230000008054 signal transmission Effects 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims description 27
- 230000009286 beneficial effect Effects 0.000 claims description 6
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- 238000013500 data storage Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
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- 230000000694 effects Effects 0.000 abstract description 7
- 238000009529 body temperature measurement Methods 0.000 abstract 1
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- 238000005265 energy consumption Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
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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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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses an operation regulation and control system and a regulation and control method based on room temperature control and quantity regulation, wherein the operation regulation and control system consists of an operation regulation and control platform of computer related software and hardware facilities provided with functions of data transmission, storage, processing and the like, a heat exchange station regulation and control software and hardware facility consisting of software and hardware facilities capable of realizing water supply temperature measurement and control and related signal transmission functions and software and hardware facilities capable of automatically realizing circulating water pump frequency conversion functions and related signal transmission functions, and a user-side regulation and control software and hardware facility consisting of software and hardware facilities capable of automatically regulating user flow according to user room temperature signals and related signal measurement and transmission functions, the regulation and control system is utilized to regulate the operation of a heating system by taking indoor temperature as a target regulation and control parameter and circulating flow and water supply temperature as an active regulation and control parameter and return water temperature as a passive regulation and control parameter, and has the advantages of rapid regulation and control effect, stable response and full power saving.
Description
Technical Field
The invention relates to the field of central heating, in particular to the field of operation regulation of a central heating system.
Background
The control parameters related to the operation and adjustment of the central heating system are usually six, namely heat load, water supply temperature, backwater temperature, flow, indoor temperature, outdoor temperature and the like, wherein the water supply temperature, backwater temperature, indoor temperature and flow are controllable parameters of the heating system, and the outdoor temperature and the heat load are non-controllable parameters.
In the operation regulation of the heating system, the four adjustable parameters can be divided into a target adjustable parameter, an active adjustable parameter and a passive adjustable parameter according to different adjustment strategies. According to different target regulation parameters, two control strategies are mainly available at present, namely a backwater temperature control method and an indoor temperature control method. Compared with two control strategies, the room temperature control method has the advantages of stable room temperature, small fluctuation, rapid room temperature reaction and the like, and the backwater temperature control rule has the defects of serious room temperature reaction lag, large fluctuation and instability; according to different active regulation parameters, three control strategies of mass regulation, mass-mass combined regulation and mass regulation exist at present. The quality regulation is a regulation strategy commonly adopted before the frequency conversion technology appears, and has the defects of lag reaction of regulation effect, high electric energy consumption of the circulating water pump and the like; the quality-quantity combined regulation is a regulation strategy widely adopted after the frequency conversion technology appears, and the regulation strategy reduces the electric energy consumption of the circulating water pump to a certain extent, but still does not reach the optimal power saving state, and meanwhile, the problem of lag in regulation effect reaction exists; and the quantity regulation can completely overcome the defect of the quality-quantity combined regulation.
Different operation regulation methods and regulation systems can be composed according to different combinations of target regulation parameters and active regulation parameters. The invention provides an operation regulation and control method and system based on room temperature control and quantity regulation, which take indoor temperature as a target regulation and control parameter, circulation flow and water supply temperature as active regulation and control parameters and return water temperature as passive regulation and control parameters.
Disclosure of Invention
In order to overcome the defects of lag, large fluctuation, instability and the like of indoor temperature reaction in a backwater temperature control method, and the technical defects of poor indoor temperature control effect, large electric energy consumption of a circulating system and insufficient energy-saving potential in a quality regulation and quality-quantity combined regulation mode, the invention aims to provide an operation regulation and control system and a regulation and control method based on room temperature control and quantity regulation, which are rapid in regulation and control effect reaction, stable in regulation and control effect and full in electricity saving.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the operation regulation and control system based on room temperature control and quantity regulation is characterized by comprising an operation regulation and control platform, a heat exchange station regulation and control software and hardware facility and a client regulation and control software and hardware facility; wherein:
the operation regulation platform consists of computer related software and hardware facilities provided with functions of data transmission, storage, processing and the like, and is used for receiving and processing related signals transmitted by regulation software and hardware facilities in the heat exchange station, client software and hardware regulation facilities and the like, and outputting related control instructions to the related software and hardware facilities according to processing results;
the heat exchange station regulation and control software and hardware facilities comprise software and hardware facilities capable of realizing the functions of measuring and controlling the water supply temperature of the secondary heat medium and related signal transmission, and software and hardware facilities capable of automatically realizing the functions of frequency conversion of the circulating water pump and related signal transmission, wherein the former software and hardware facilities are used for measuring the water supply temperature of the secondary heat medium and transmitting the temperature signal to the operation regulation and control platform, receiving and executing related instructions from the operation regulation and control platform, and keeping the water supply temperature maintained at a certain set value or automatically changing according to a certain set rule; the latter is used for receiving and executing related instructions from the operation regulation platform, automatically adjusting the operation frequency of the circulating water pump to a proper value, and simultaneously transmitting related signals such as frequency, flow, temperature difference and the like to the operation regulation platform;
the user end regulation and control software and hardware facility consists of a software and hardware facility capable of setting, measuring and automatically regulating and controlling user flow and a software and hardware facility with related signal measuring and transmitting functions, and is used for setting and measuring the room temperature of each user end, transmitting room temperature and valve opening signals to the operation regulation and control platform, and receiving and executing related instructions from the operation regulation and control platform.
Further, the heat exchange station regulation and control software and hardware facilities comprise two components of a secondary heat medium water supply temperature regulation and control software and hardware facility and a circulating water pump variable frequency regulation and control software and hardware facility; the secondary heat medium water supply temperature regulation and control software and hardware facility comprises a network electric regulating valve, a valve control system, corresponding valve position signals, a second network temperature sensor, a temperature signal transmission device and the like, wherein the network electric regulating valve is arranged on a water supply or return pipeline of a primary heat medium of a heat exchange unit, and the second network temperature sensor is arranged on a water supply pipeline of a secondary heat medium of the heat exchange unit; the circulating water pump variable frequency control software and hardware facility comprises a circulating water pump variable frequency controller and a corresponding signal transmission device, wherein the circulating water pump variable frequency controller and the corresponding signal transmission device are preferably arranged near the circulating water pump.
Further, the user terminal software and hardware regulation facility comprises a user terminal indoor temperature setting and measuring device, a corresponding temperature signal transmission device, a user terminal electric regulating valve and a corresponding signal transmission device, wherein the user terminal indoor temperature measuring device and the corresponding temperature signal transmission device are arranged at designated positions in a room, and the user terminal electric regulating valve and the corresponding signal transmission device are arranged on a water supply pipeline or a water return pipeline of a user terminal heat power inlet.
Furthermore, the operation regulation and control platform of the central heating system consists of software and hardware facilities and other auxiliary components for realizing the functions of signal transmission, data storage, data processing, data output and the like, and is arranged in a heat exchange station of the central heating system or in a separate room.
The invention relates to a regulating and controlling method of an operation regulating and controlling system based on room temperature control and quantity regulation, which is characterized by comprising two parts, namely secondary heat medium water supply temperature regulation and secondary heat medium flow regulation, wherein the two parts are controlled by an operation regulating and controlling platform; wherein:
the secondary heat medium water supply temperature regulation and control steps are as follows:
1.1: setting a secondary heat medium water supply temperature range value on an operation regulation platform;
1.2: the operation regulation and control platform receives the actual measurement signal of the water supply temperature of the secondary heating medium, compares the actual measurement signal with a set range value, and outputs a regulation and control instruction of the electric regulating valve according to a comparison result, wherein the regulation and control instruction is divided into the following three conditions:
if the measured value of the water supply temperature of the secondary heat medium is within the set range, a regulating instruction of keeping the current state of the electric regulating valve is sent out, if the measured value of the water supply temperature of the secondary heat medium is lower than the lower limit value of the set range, a regulating instruction of regulating up one gear or increasing one step of the electric regulating valve is sent out, and if the measured value of the water supply temperature of the secondary heat medium is higher than the upper limit value of the set range, a regulating instruction of regulating down one gear or decreasing one step of the electric regulating valve is sent out;
it should be noted that: because the electric regulating valve has gears and has no gears, the description of regulating according to gears or step sizes can appear, and the regulation of the electric regulating valve at the back user end is the same.
1.3: the electric control valve actuating mechanism of the network receives the control instruction and completes one-time adjustment action;
1.4: repeating the steps 1.2-1.3 at intervals, and circularly regulating and controlling the water supply temperature of the secondary heating medium to ensure that the water supply temperature of the secondary heating medium is maintained within a set range value, wherein the size of each interval is determined according to the principle of the stability favorable for controlling the water supply temperature and the stability of regulating and controlling the operation of the system;
the secondary heat medium flow regulation and control steps are as follows:
2.1: flow regulation and control of opening adjustment of electric regulating valve at user end
2.1.1: indoor-related room-temperature signal acquisition
The operation control platform receives room temperature set interval signals of all the clients and room temperature signals sent by the indoor temperature measuring device;
2.1.2: control of household electric regulating valve
The operation regulation and control platform compares the received room temperature actual measurement value with the respective room temperature set interval value and then sends opening regulation instructions to all the electric regulating valves at the user end; for the regulation and control of each user side electric regulating valve, the following strategy is implemented:
if the measured value of the room temperature of a certain user end received by the operation control platform is lower than the lower limit value of the set interval of the user end, the operation control platform sends out a command, and the opening of the electric control valve of the user end is increased by one step or one step; if the measured value of the room temperature of a certain user end received by the operation control platform is higher than the upper limit value of the set interval of the user end, the operation control platform sends out an instruction, and the opening of the electric control valve of the user end is reduced by one step or one step; if the actually measured value of the room temperature of a certain user end which is received by the operation control platform at regular time is just positioned in the set interval of the room temperature of the user end, the operation control platform sends out an instruction, and the electric control valve of the user end keeps the original opening;
2.2: flow regulation and control of variable-frequency operation of circulating water pump
2.2.1: electric regulating valve for selecting least unfavorable user end
After the regulation and control of the step 2.1.2 are completed, the operation regulation and control platform receives opening signals of all the electric regulating valves at the user ends and compares the opening signals, and the electric regulating valve at the user end with the largest opening is selected as the electric regulating valve at the user end which is most unfavorable;
2.2.2: setting a frequency adjustment interval of a circulating water pump
Setting a certain section of the opening of the electric regulating valve at the most unfavorable user side as a frequency regulating section of the circulating water pump;
2.2.3: frequency regulation and control of circulating water pump
If the opening value of the electric regulating valve at the most unfavorable user side is lower than the lower limit value of the frequency regulating section of the circulating water pump set in the step 2.2.2, the running regulating and controlling platform sends out a command, and the circulating water pump runs at a certain frequency in a lowering way; if the opening value of the electric regulating valve at the most unfavorable user side is higher than the upper limit value of the frequency regulating section of the circulating water pump set in the step 2.2.2, the operation regulating and controlling platform sends out a command, and the circulating water pump is lifted to operate at a certain frequency; if the opening value of the least unfavorable electric regulating valve at the user end is just positioned in the frequency regulating section of the circulating water pump set in the step 2.2.2, the running regulating platform sends out an instruction, the circulating water pump runs stably at the current frequency, and the certain frequency is selected according to the principle of being beneficial to the stability of working conditions and the running stability of a regulating system;
2.3: and (3) repeating the steps 2.1-2.2 at intervals, and circularly regulating and controlling the flow of the secondary heating medium to ensure that the indoor temperatures of all the clients finally reach a set value range, wherein the size of each interval is determined according to the principle of being beneficial to the control of the indoor temperatures and the stability of regulating and controlling the operation of the system.
The following describes the advantages according to the inventive adjusting principle:
1. because the flow speed of the heating medium in the pipeline system is slower, the heat storage capacity of the fluid is high, and the temperature change of the heating medium is slow, the change of the heat supply capacity of the system has larger hysteresis relative to the change of the heat load in a quality adjustment mode or a quality-quality combined adjustment mode, and the temperature of a control room is difficult to quickly reach an ideal value, so that the temperature control effect of the heat utilization environment is affected. In the room temperature regulation mode, as the mechanical parameter changes of fluid such as pressure, flow and the like are propagated at sound velocity in the pipeline system, the change of the heating capacity of the heating system is almost consistent in time relative to the change of the heat load, thereby being beneficial to timeliness and stability of room temperature control.
2. The change in the amount of heat supplied by the system depends on the heat load, i.e., the outdoor weather parameter, and is independent of the mode of operation regulation employed. However, in terms of the power consumption of the heat medium transportation, the power consumption of the quantity adjustment is the lowest compared with three adjustment modes of quality adjustment, quality-quantity combination adjustment and quantity adjustment. The variable flow control mode is realized by a plurality of variable flow modes such as the operation of the terminal electric control valve adjusting and matching the fixed frequency pump, the passive variable frequency operation of the terminal electric control valve adjusting and matching the variable frequency pump, the manual variable frequency operation of the terminal electric control valve adjusting and matching the variable frequency pump, the active variable frequency operation of the terminal electric control valve adjusting and matching the variable frequency pump and the like, and the electric energy consumption of the variable flow control mode is the lowest among the variable flow control modes.
3. The invention adopts dynamic circulation adjustment to the heating system, the first-stage electric adjusting valve or the household electric adjusting valve adjusts a step length according to a circulation, and the circulating water pump adjusts a fixed frequency according to a circulation.
4. The operation regulation and control method and system provided by the invention have the advantages of reasonable regulation and control model, single regulation and control parameters, simple regulation and control logic and easiness in system realization.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced, the drawings in the following description are only an example schematic diagram of the present invention, and other similar drawings can be obtained according to these drawings for those skilled in the art.
Fig. 1 is a simplified workflow diagram of an example of the present invention, in which n user branches and wireless transmission are taken as examples.
In the figure: k represents an operation regulation platform; r represents a heat exchange station; b represents a circulating water pump; y is Y 1 -Y n Respectively representing the 1 st to nth clients; f (F) 0 Representing a one-net electric regulating valve of the heat exchange station; f (F) 1 -F n Respectively represent the 1 st to the n th electric regulating valves at the user end.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and unambiguous the scope of the present invention.
As seen from fig. 1, the whole software and hardware of the operation control system of the present invention includes three blocks, namely, an operation control platform software and hardware facility, a heat exchange station control software and hardware facility, and a client control software and hardware facility, wherein:
the operation control platform software and hardware facilities comprise data storage and processing facilities and signal transmission facilities;
the heat exchange station regulation and control software and hardware facility comprises a net electric regulating valve F arranged on a water supply or return pipeline of primary heat medium of a heat exchange unit 0 The auxiliary facilities, the temperature sensor and the signal transmission auxiliary facilities are arranged on the secondary heat medium water supply pipeline of the heat exchange unit, and the variable-frequency circulating water pump and the frequency regulation software and hardware facilities are arranged on the heat supply pipeline of the heat exchange station;
the client regulation and control software and hardware facilities comprise a client Y installed from 1 st to nth 1 -Y n Electric regulating valve F on water supply or return pipeline of heating power inlet 1 -F n And signal measuring and transmitting facilities thereof, and a user side indoor temperature setting and measuring device and signal transmitting facilities thereof which are installed in a room.
The following describes in detail how the operation control system based on room temperature control and quantity adjustment of the present invention is implemented according to fig. 1, in which a first-stage electric control valve F 0 And the 1 st to nth user side electric regulating valve F 1 -F n All are electric regulating valves with gears.
The operation regulation and control method comprises two parts, wherein the first part is secondary heat medium water supply temperature regulation and control, the second part is secondary heat medium flow regulation and control, the two parts are independently operated under the control of an operation regulation and control platform K, when a regulation and control system operates for the first time, the operation of the secondary heat medium water supply temperature regulation and control is started at first time, after the heat supply system operates stably, the operation of the secondary heat medium flow regulation and control is started, and then the two parts are independently and circularly operated according to respective interval time respectively, wherein the operation regulation and control method comprises the following steps of:
a first part: the secondary heat medium water supply temperature regulation and control steps are as follows:
1.1: setting the water supply temperature of the secondary heating medium on an operation regulation and control platform K, for example, 60+/-1 ℃;
1.2: the operation regulation and control platform K receives the two-network heat medium water supply temperature actual measurement signal and compares the signal with a set value; if the measured value is higher than 61 ℃, the operation platform K sends out a first-stage electric regulating valve F 0 Closing a first-gear regulation instruction; if the measured value is lower than 59 DEG CThe operation platform K sends out a primary electric regulating valve F 0 A regulation instruction of a first gear is opened; if the measured value is just between 59 ℃ and 61 ℃, the operation control platform K sends out a primary electric control valve F 0 Maintaining the regulation and control instruction of the original opening;
1.3: electric regulating valve F 0 The execution mechanism of the control platform receives a control instruction sent by the operation control platform K, and completes one-time adjustment action;
for example, if a net of electric regulating valves F 0 When receiving the regulation instruction of closing the first gear, a net electric regulating valve F 0 Performing a closing first gear operation; if a net electric regulating valve F 0 When receiving the regulation command of the first gear, a net electric regulating valve F 0 Performing a first gear operation; if a net electric regulating valve F 0 Receiving a regulation instruction for maintaining the original opening degree, a net electric regulating valve F 0 Maintaining the original opening degree operation;
1.4: and repeating the steps 1.2 and 1.3 at intervals, and circularly regulating and controlling the temperature of the secondary heat medium water supply so as to finally maintain the temperature near the set value of 60 ℃.
For example, after the regulation and control action of 1.3 is completed for 10 minutes, the operation regulation and control platform K receives the measured signal of the water supply temperature of the secondary heating medium again, and steps 1.2 and 1.3 are repeated, and the circulation is performed until the water supply temperature of the secondary heating medium is maintained to be about 60 ℃, namely, between 59 ℃ and 61 ℃.
A second part: the secondary heat medium flow regulation and control steps are as follows:
2.1: flow regulation and control of opening adjustment of electric regulating valve at user end
2.1.1: indoor-related room-temperature signal acquisition
The operation control platform K receives the 1 st to nth user terminals Y 1 -Y n Room temperature signal and room temperature set interval signal sent by the temperature measuring device;
2.1.2: flow regulation and control of opening adjustment of electric regulating valve at user end
The 1 st to nth clients Y to be received by the operation control platform K 1 -Y n The room temperature signals sent by the temperature measuring device are respectively entered with the respective room temperature setting intervalsAfter the row comparison, the 1 st to the n th electric regulating valves F are used for all the electric regulating valves at the user end 1 To F n Sending out an opening adjusting instruction;
if the room temperature value of a certain user end received by the operation control platform K is just within a room temperature setting interval of the user end, the operation control platform K sends out an instruction, and the electric control valve of the user end keeps the original opening; if the room temperature value of a certain user end which is received by the operation control platform K at regular time is lower than the lower limit value of the set interval of the user end, the operation control platform K sends out an instruction, and the opening of the electric control valve of the user end is increased by one step; if the room temperature value of a certain user end which is received by the operation control platform K at regular time is higher than the upper limit value of the set interval of the user end, the operation control platform K sends out an instruction, and the opening of the electric control valve of the user end is reduced by one step.
For example, the mth client Y is set m The lower limit of the room temperature setting section is 19℃and the upper limit is 21 ℃. If the m-th room temperature value received by the operation control platform K is just within the room temperature setting interval of the user, the operation control platform K sends out a command, and the m-th electric control valve of the user keeps the original opening; if the operation control platform K receives the mth client Y at regular time m The room temperature value of the (2) is lower than the lower limit value of the set interval of the user terminal by 19 ℃, the operation regulation and control platform K sends out a command, and the mth user terminal electric regulation valve F m The opening is increased by one gear; if the operation control platform K receives the mth client Y at regular time m The room temperature value of (2) is higher than the upper limit value of the set interval of the user terminal by 21 ℃, the operation and control platform K sends out a command, and the mth user terminal Y m Electric regulating valve F of (2) m The opening is reduced by one step;
2.2: flow regulation and control of variable-frequency operation of circulating water pump
2.2.1: electric regulating valve for selecting least unfavorable user end
After the regulation and control of the step 2.1.2 are completed, the operation regulation and control platform K receives the 1 st to nth user side electric regulating valves F 1 To F n The opening degree signals of the (a) are compared, a user-side electric regulating valve with the largest opening degree is selected as the most unfavorable user-side electric regulating valve, and the nth user-side electric regulating valve F is assumed n The nth user terminal has the largest opening degreeIs the least unfavorable client;
2.2.2: setting a frequency adjustment interval of a circulating water pump
Setting an nth user side electric regulating valve F n Is used as a frequency adjustment section of the circulating water pump. For example, an nth user side electric regulating valve F is set n The section with the opening degree being 85% -95% of the full opening degree is the frequency adjusting section of the circulating water pump B.
For an electric regulating valve without a gear, the section with the opening degree being 85% -95% of the full opening degree refers to 85% -95% of the step length;
for an electric control valve with gears, the opening is in the range of 85% -95% of the full opening, and the opening needs to be converted into a gear range according to the total number of gears. For example, the nth user side electric regulating valve F n There are 10 gears, and the interval of the opening degree being 85% -95% of the full opening degree is changed into the gear interval, namely the 9 th gear, such as the nth user-end electric regulating valve F n There are 20 gears, and the interval between 85% and 95% of the opening is changed into the gear interval which is the 17 th, 18 th and 19 th gears.
2.2.3: frequency regulation and control of circulating water pump B
If the opening value of the least unfavorable electric regulating valve at the user end is just positioned in the frequency regulating interval of the circulating water pump B set in the step 2.2.2, the running regulating and controlling platform K sends out a command, and the circulating water pump B stably runs at the current frequency; if the opening value of the electric regulating valve at the most unfavorable user side is lower than the lower limit value of the frequency regulating interval of the circulating water pump B set in the step 2.2.2, the operation regulating and controlling platform K sends out a command, and the circulating water pump B operates at a certain frequency in a lowering way; if the opening value of the electric regulating valve at the most unfavorable user side is higher than the upper limit value of the frequency regulating interval of the circulating water pump B set in the step 2.2.2, the operation regulating and controlling platform K sends out a command, the circulating water pump B is lifted to operate at a certain frequency, and the magnitude of the certain frequency is selected according to the principle of being beneficial to working conditions and regulating and controlling the operation stability of the system;
for example, taking the total number of gear positions of the electric control valve as 20 as an example, if the nth user side electric control valve F n When the gear is just positioned in the 18 th gear, the operation regulation and control platform K sends out an instruction, and the circulating water pump B maintainsOperating at an original frequency; if the nth user terminal electric regulating valve F n If the gear of the water pump B is lower than the 17 th gear, the operation regulation and control platform K sends out an instruction, and the circulating water pump B reduces certain frequency to operate; if the nth user terminal electric regulating valve F n When the gear is higher than the 19 th gear, the operation regulation and control platform K sends out a command, and the circulating water pump B is lifted to operate at a certain frequency.
For another example, taking the total number of gear positions of the electric control valve as 10, if the nth user side electric control valve F n When the gear is just positioned in the 9 th gear, the operation regulation and control platform K sends out an instruction, and the circulating water pump B maintains the original frequency operation; if the nth user terminal electric regulating valve F n If the gear of the water pump B is lower than the 9 th gear, the operation regulation and control platform K sends out an instruction, and the circulating water pump B reduces certain frequency to operate; if the nth user terminal electric regulating valve F n When the gear is higher than the 9 th gear, the operation regulation and control platform K sends out a command, and the circulating water pump B is lifted to operate at a certain frequency.
2.3: repeating the steps 2.2-2.3 at certain intervals, and circularly regulating and controlling the flow of the secondary heating medium.
For example, every 10 minutes, the operation control platform K receives the 1 st to nth clients Y again 1 -Y n And (2) repeating the steps 2.2-2.3 to regulate and control the secondary heat medium flow again so that the opening of the electric regulating valve of each user end is maintained in the range of 85% -95% of full opening, and thus the indoor temperature is finally maintained in the range of the set value.
The foregoing is only one embodiment of the present invention, and is not intended to limit the technical solution, and in practice, the technical solution is also applicable to a primary pipe network heating system. When the heat exchange station is used for a primary pipe network heat supply system, the heat exchange station refers to a heat exchange primary station of the primary heat supply system, and the electric control valve of the primary pipe network refers to an electric control valve arranged on a primary heat medium pipeline in the heat exchange primary station; the circulating water pump refers to a circulating water pump of a primary pipe network in the heat exchange primary station; the household-end electric regulating valve refers to an electric regulating valve arranged on a primary heat medium pipeline of each secondary heat exchange station, and the household-end temperature measuring device is replaced by a backwater temperature measuring device arranged on a backwater pipeline of each secondary heat medium. In short, the technical proposal obtained without departing from the design idea of the invention is within the protection scope, and the specific protection scope is subject to the scope of the claims.
Claims (3)
1. The operation regulation and control system based on room temperature control and quantity regulation is characterized by comprising an operation regulation and control platform, a heat exchange station regulation and control software and hardware facility and a client regulation and control software and hardware facility; wherein:
the operation regulation platform consists of computer related software and hardware facilities provided with functions of data transmission, storage, processing and the like, and is used for receiving and processing related signals transmitted by regulation software and hardware facilities in the heat exchange station, client software and hardware regulation facilities and the like, and outputting related control instructions to the related software and hardware facilities according to processing results;
the heat exchange station regulation and control software and hardware facilities comprise software and hardware facilities capable of realizing the functions of measuring and controlling the water supply temperature of the secondary heat medium and related signal transmission, and software and hardware facilities capable of automatically realizing the functions of frequency conversion of the circulating water pump and related signal transmission, wherein the former software and hardware facilities are used for measuring the water supply temperature of the secondary heat medium and transmitting the temperature signal to the operation regulation and control platform, receiving and executing related instructions from the operation regulation and control platform, and keeping the water supply temperature maintained at a certain set value or automatically changing according to a certain set rule; the latter is used for receiving and executing related instructions from the operation regulation platform, automatically adjusting the operation frequency of the circulating water pump to a proper value, and simultaneously transmitting related signals such as frequency, flow, temperature difference and the like to the operation regulation platform;
the user end regulation and control software and hardware facility consists of a software and hardware facility capable of setting, measuring and automatically regulating and controlling user flow and a software and hardware facility with related signal measuring and transmitting functions, and is used for setting and measuring the room temperature of each user end, transmitting room temperature and valve opening signals to the operation regulation and control platform, and receiving and executing related instructions from the operation regulation and control platform.
2. The room temperature control and quantity adjustment based operation regulation system of claim 1 wherein:
the heat exchange station regulation and control software and hardware facility comprises two components of a secondary heat medium water supply temperature regulation and control software and hardware facility and a circulating water pump variable frequency regulation and control software and hardware facility; the secondary heat medium water supply temperature regulation and control software and hardware facility comprises a network electric regulating valve, a valve control system, corresponding valve position signals, a second network temperature sensor, a temperature signal transmission device and the like, wherein the network electric regulating valve is arranged on a water supply or return pipeline of a primary heat medium of a heat exchange unit, and the second network temperature sensor is arranged on a water supply pipeline of a secondary heat medium of the heat exchange unit; the circulating water pump variable frequency control software and hardware facility comprises a circulating water pump variable frequency controller and a corresponding signal transmission device, wherein the circulating water pump variable frequency controller and the corresponding signal transmission device are preferably arranged near the circulating water pump;
the household terminal software and hardware regulation facility comprises a household terminal indoor temperature setting and measuring device, a corresponding temperature signal transmission device, a household terminal electric regulating valve and a corresponding signal transmission device, wherein the household terminal indoor temperature measuring device and the corresponding temperature signal transmission device are arranged at designated positions in a room, and the household terminal electric regulating valve and the corresponding signal transmission device are arranged on a water supply pipeline or a water return pipeline of a household terminal heat power inlet;
the operation regulation and control platform consists of software and hardware facilities and other auxiliary components for realizing the functions of signal transmission, data storage, data processing and data output, and is arranged in a heat exchange station of a central heating system or in a separate room.
3. The control method of the operation control system based on room temperature control and quantity regulation according to claim 1 or 2, characterized in that the control method comprises two parts of secondary heat medium water supply temperature control and secondary heat medium flow control, both parts are controlled by an operation control platform, during primary operation, the secondary heat medium water supply temperature control starts operation firstly, and after the heat supply system operates stably, the secondary heat medium flow control is started to operate again, and then the two parts operate independently and circularly according to respective interval time; wherein:
the secondary heat medium water supply temperature regulation and control steps are as follows:
1.1: setting a secondary heat medium water supply temperature range value on an operation regulation platform;
1.2: the operation regulation and control platform receives the actual measurement signal of the water supply temperature of the secondary heating medium, compares the actual measurement signal with a set range value, and outputs a regulation and control instruction of the electric regulating valve according to a comparison result, wherein the regulation and control instruction is divided into the following three conditions:
if the measured value of the water supply temperature of the secondary heat medium is within the set range, a regulating instruction of keeping the current state of the electric regulating valve is sent out, if the measured value of the water supply temperature of the secondary heat medium is lower than the lower limit value of the set range, a regulating instruction of regulating up one gear or increasing one step of the electric regulating valve is sent out, and if the measured value of the water supply temperature of the secondary heat medium is higher than the upper limit value of the set range, a regulating instruction of regulating down one gear or decreasing one step of the electric regulating valve is sent out;
1.3: the electric control valve actuating mechanism of the network receives the control instruction and completes one-time adjustment action;
1.4: repeating the steps 1.2-1.3 at intervals, and circularly regulating and controlling the water supply temperature of the secondary heating medium to ensure that the water supply temperature of the secondary heating medium is finally maintained within a set range value, wherein the size of each interval is determined according to the principle of the stability favorable for controlling the water supply temperature and the stability for regulating and controlling the operation of the system;
the secondary heat medium flow regulation and control steps are as follows:
2.1: flow regulation and control of opening adjustment of electric regulating valve at user end
2.1.1: indoor-related room-temperature signal acquisition
The operation control platform receives room temperature set interval signals of all the clients and room temperature signals sent by the indoor temperature measuring device;
2.1.2: control of household electric regulating valve
The operation regulation and control platform compares the received room temperature actual measurement value with the respective room temperature set interval value and then sends opening regulation instructions to all the electric regulating valves at the user end; for the regulation and control of each user side electric regulating valve, the following strategy is implemented:
if the measured value of the room temperature of a certain user end received by the operation control platform is lower than the lower limit value of the set interval of the user end, the operation control platform sends out a command, and the opening of the electric control valve of the user end is increased by one step or one step; if the measured value of the room temperature of a certain user end received by the operation control platform is higher than the upper limit value of the set interval of the user end, the operation control platform sends out an instruction, and the opening of the electric control valve of the user end is reduced by one step or one step; if the actually measured value of the room temperature of a certain user end which is received by the operation control platform at regular time is just positioned in the set interval of the room temperature of the user end, the operation control platform sends out an instruction, and the electric control valve of the user end keeps the original opening;
2.2: flow regulation and control of variable-frequency operation of circulating water pump
2.2.1: electric regulating valve for selecting least unfavorable user end
After the regulation and control of the step 2.1.2 are completed, the operation regulation and control platform receives opening signals of all the electric regulating valves at the user ends and compares the opening signals, and the electric regulating valve at the user end with the largest opening is selected as the electric regulating valve at the user end which is most unfavorable;
2.2.2: setting a frequency adjustment interval of a circulating water pump
Setting a certain section of the opening of the electric regulating valve at the most unfavorable user side as a frequency regulating section of the circulating water pump;
2.2.3: frequency regulation and control of circulating water pump
If the opening value of the electric regulating valve at the most unfavorable user side is lower than the lower limit value of the frequency regulating section of the circulating water pump set in the step 2.2.2, the running regulating and controlling platform sends out a command, and the circulating water pump runs at a certain frequency in a lowering way; if the opening value of the electric regulating valve at the most unfavorable user side is higher than the upper limit value of the frequency regulating section of the circulating water pump set in the step 2.2.2, the operation regulating and controlling platform sends out a command, and the circulating water pump is lifted to operate at a certain frequency; if the opening value of the least unfavorable electric regulating valve at the user end is just positioned in the frequency regulating section of the circulating water pump set in the step 2.2.2, the running regulating platform sends out an instruction, the circulating water pump runs stably at the current frequency, and the certain frequency is selected according to the principle of being beneficial to the stability of working conditions and the running stability of a regulating system;
2.3: and (3) repeating the steps 2.1-2.2 at intervals, and circularly regulating and controlling the flow of the secondary heating medium to ensure that the indoor temperatures of all the clients finally reach a set value range, wherein the size of each interval is determined according to the principle of being beneficial to the control of the indoor temperatures and the stability of regulating and controlling the operation of the system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117823998A (en) * | 2024-03-06 | 2024-04-05 | 河北工大科雅能源科技股份有限公司 | Intelligent combined control method for pipeline pump and electric regulating valve of multi-unit heat exchange station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117823998A (en) * | 2024-03-06 | 2024-04-05 | 河北工大科雅能源科技股份有限公司 | Intelligent combined control method for pipeline pump and electric regulating valve of multi-unit heat exchange station |
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