CN113390125A - Unit start-stop control method, system and device based on water outlet temperature correction - Google Patents
Unit start-stop control method, system and device based on water outlet temperature correction Download PDFInfo
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- CN113390125A CN113390125A CN202010179838.7A CN202010179838A CN113390125A CN 113390125 A CN113390125 A CN 113390125A CN 202010179838 A CN202010179838 A CN 202010179838A CN 113390125 A CN113390125 A CN 113390125A
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- 238000012937 correction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
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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
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/108—Resuming operation, e.g. after power outages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/128—Preventing overheating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/215—Temperature of the water before heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/254—Room temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/375—Control of heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Computer Hardware Design (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a method, a system and a device for controlling the start and stop of a unit based on water outlet temperature correction. Wherein, the method comprises the following steps: determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit; when the outlet water temperature of the unit is determined to be too high, the unit is automatically stopped, and the inlet water temperature of the unit corresponding to the current outlet water temperature is detected to obtain a corrected temperature; and determining whether the unit can be restarted or not by combining the corrected temperature according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped. The condition of the water inlet temperature during starting is corrected and judged by utilizing the water inlet temperature corresponding to the water outlet temperature during subdivision of the environmental temperature stage and shutdown, the problem of how to avoid frequently starting and stopping the compressor unit is solved, and effective operation and safe use of the compressor unit are ensured.
Description
Technical Field
The invention relates to the field of heating unit/hot water unit control, in particular to a unit start-stop control method, a system and a device based on water outlet temperature correction.
Background
In order to prevent the compressor from exceeding the operation range, the air source heat pump heating unit or the air source heat pump hot water unit (heating/hot water unit) limits the highest water outlet temperature of the unit at different environmental temperatures, the unit stops when the water outlet temperature of the unit reaches a protection value, and the unit judges whether the unit needs to be restarted or not according to the water inlet temperature after the unit stops. At the moment, the water inlet temperature or the water tank temperature for judging whether the unit is restarted is generally a fixed value. When the circulating water flow of the unit is too small, or the environment temperature is high, the temperature difference between inlet water and outlet water of the unit is high, when the unit is stopped due to the fact that the temperature of outlet water is too high, the temperature of inlet water or the temperature of a water tank is low, the condition for restarting the unit is probably met at the moment, the unit can be restarted immediately, the temperature of outlet water of the unit can reach a limit value immediately after the unit is started, and the unit can be stopped again, so that the unit is started and stopped frequently.
Therefore, a new scheme for controlling the start and stop of the unit according to the outlet water temperature and the inlet water temperature and effectively preventing the unit from being started and stopped frequently is needed.
Disclosure of Invention
In order to overcome the defects, the invention is provided to solve or at least partially solve the technical problem of how to improve the start-stop control condition of a heating unit or a hot water unit by correcting the start-stop condition of the unit through the outlet water temperature so as to avoid the frequent stop and restart of the unit. The invention provides a method, a system and a device for controlling the start and stop of a unit based on water outlet temperature correction to solve the technical problems.
In a first aspect, a unit start-stop control method based on outlet water temperature correction is provided, which includes: determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit; when the outlet water temperature of the unit is determined to be too high, the unit is automatically stopped, and the inlet water temperature of the unit corresponding to the current outlet water temperature is detected to obtain a corrected temperature; and determining whether the unit can be restarted or not by combining the corrected temperature according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped.
The method for determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit specifically comprises the following steps: dividing the ambient temperature into a plurality of temperature stages, and correspondingly setting a shutdown water temperature threshold value of the unit in each temperature stage; comparing the outlet water temperature of the unit detected in real time with the shutdown water temperature threshold; and if the water temperature is larger than or equal to the shutdown water temperature threshold value, the outlet water temperature and the outlet water temperature are too high.
The step of determining whether the unit can be restarted or not according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped and in combination with the correction temperature specifically includes: correspondingly setting a starting water temperature threshold value of the unit in each divided temperature stage of the plurality of temperature stages after the unit is shut down due to overhigh outlet water temperature; and comparing the inlet water temperature of the unit detected in real time with the corrected temperature and the starting water temperature threshold, and restarting the unit if the unit starting condition is met.
The step of stopping the machine and detecting the water inlet temperature of the unit corresponding to the current water outlet temperature to obtain the corrected temperature includes: and in each temperature stage, the inlet water temperature of the unit corresponding to the current outlet water temperature detected when the unit is stopped due to overhigh outlet water temperature is taken as a reference temperature, and a temperature difference value is subtracted from the reference temperature to be taken as a correction temperature.
Wherein, the "multiple temperature stages", "shutdown water temperature threshold" and "startup water temperature threshold" specifically include: when judging whether the unit is stopped or started, dividing a plurality of temperature stages divided by the ambient temperature of the unit into five temperature stages which respectively correspond to five stopping water temperature thresholds and five starting water temperature thresholds; the "subtracting a temperature difference value from the reference temperature as a corrected temperature" specifically includes: the temperature difference subtracted from the reference temperature is 4 ℃; "real-time detection the unit the temperature of intaking with revise the temperature and start the temperature threshold value and compare, if accord with unit start condition then restart the unit", specifically include: and in the corresponding temperature stage, if the comparison result is that the water inlet temperature of the unit detected in real time is smaller than the correction temperature and smaller than or equal to the starting water temperature threshold value, and the unit is judged to be in accordance with the unit starting condition, restarting the unit.
In a second aspect, a unit start-stop control system based on outlet water temperature correction is provided, which includes: the shutdown module is used for determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit; the correction module is used for automatically stopping the unit when the outlet water temperature of the unit is determined to be too high, and detecting the inlet water temperature of the unit corresponding to the current outlet water temperature to obtain a corrected temperature; and the starting module is used for determining whether the unit can be restarted or not according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped and in combination with the corrected temperature.
Wherein, the shutdown module specifically comprises: dividing the ambient temperature into a plurality of temperature stages, and correspondingly setting a shutdown water temperature threshold value of the unit in each temperature stage; comparing the outlet water temperature of the unit detected in real time with the shutdown water temperature threshold; if the water temperature is larger than or equal to the shutdown water temperature threshold value, the outlet water temperature and the outlet water temperature are too high; the correction module specifically comprises: taking the water inlet temperature of the unit corresponding to the current water outlet temperature detected while the unit is shut down due to overhigh water outlet temperature as a reference temperature at each temperature stage, and subtracting a temperature difference value from the reference temperature to obtain a corrected temperature; the starting module specifically comprises: correspondingly setting a starting water temperature threshold value of the unit in each divided temperature stage of the plurality of temperature stages after the unit is shut down due to overhigh outlet water temperature; and comparing the inlet water temperature of the unit detected in real time with the corrected temperature and the starting water temperature threshold, and restarting the unit if the unit starting condition is met.
Wherein, the "multiple temperature stages", "shutdown water temperature threshold" and "startup water temperature threshold" specifically include: when judging whether the unit is stopped or started, dividing a plurality of temperature stages divided by the ambient temperature of the unit into five temperature stages which respectively correspond to five stopping water temperature thresholds and five starting water temperature thresholds; the "subtracting a temperature difference value from the reference temperature as a corrected temperature" specifically includes: the temperature difference subtracted from the reference temperature is 4 ℃; the starting module specifically further comprises: and in the corresponding temperature stage, if the comparison result is that the water inlet temperature of the unit detected in real time is smaller than the correction temperature and smaller than or equal to the starting water temperature threshold value, and the unit is judged to be in accordance with the unit starting condition, restarting the unit.
In a third aspect, an apparatus with a heating unit/hot water unit is provided, which includes the unit start-stop control system modified based on the outlet water temperature.
In a fourth aspect, there is provided a control apparatus comprising: the system comprises a processing unit and a storage unit connected with the processing unit, wherein the storage unit stores programs capable of executing the steps of the unit start-stop control method based on the outlet water temperature correction, and the processing unit can call the programs and execute the steps of the methods.
One or more technical schemes of the invention at least have one or more of the following beneficial effects:
according to the technical scheme, the highest water outlet temperature of the unit is controlled in a segmented mode according to the environment temperature, the running range of the compressor is limited more accurately, the compressor can be prevented from exceeding the running range, and the running space of the compressor can be played to the maximum extent; according to the water inlet temperature Tewi when the unit is stopped due to the water outlet temperaturecAs reference temperature, through intake water temperature Tewi and TewicWhether the unit is restarted or not is judged by comparing, and the unit can be self-adapted to the unitThe water inlet and outlet temperature difference of the unit is large, and the unit can be prevented from being started and stopped frequently.
Furthermore, the water inlet temperature Tewi of the unit when the unit is stopped due to the water outlet temperature is utilizedcAs reference temperature, through intake water temperature Tewi and TewicThe comparison of (1) judging whether the unit is restarted, reserving 4 ℃ of temperature difference (correcting the condition of judging the water inlet temperature) according to the water inlet temperature when the unit is stopped, ensuring that the unit cannot be restarted immediately after the unit is stopped due to overhigh water outlet temperature, reserving 4 ℃ of temperature difference, and ensuring that the unit cannot be started immediately after the unit is stopped due to overhigh water outlet temperature.
Drawings
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a main flow chart of an embodiment of an outlet water temperature control method of a heating/hot water unit according to the present invention;
fig. 2 is a block diagram of an embodiment of a plant start-stop control system based on leaving water temperature correction according to the present invention.
Detailed Description
For the purpose of facilitating understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and examples, but it will be understood by those skilled in the art that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module" or "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, or may be a combination of software and hardware. The processor may be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and/or signal processing functionality. The processor may be implemented in software, hardware, or a combination thereof. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random-access memory, and the like. The term "a and/or B" denotes all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" means similar to "A and/or B" and may include only A, only B, or both A and B. The singular forms "a", "an" and "the" may include the plural forms as well.
In the prior art, the outlet water temperature of the air source heat pump heating unit or the air source heat pump hot water unit (namely, the heating/hot water unit) can be detected, and particularly, in order to prevent the compressor from exceeding the operation range, the outlet water temperature Tewo of the unit detected under different environmental temperatures Ta can be judged. If the highest outlet water temperature threshold value (fixed value) is reached or exceeded, the outlet water temperature of the unit is considered to be too high, the unit is stopped, and the unit is restarted after the temperature is reduced. The machine halt condition of the machine set with overhigh water outlet temperature is as follows: a) when the environmental temperature Ta of the unit is less than or equal to 5 ℃, and the water outlet temperature Tewo of the unit is more than or equal to 55 ℃, the operation lasts for 3S, and the unit automatically stops; b) when Ta is more than 5 and less than 15 ℃, Tewo is more than or equal to 60 ℃, the temperature lasts for 3S, and the unit automatically stops; c) when the temperature of Ta is more than or equal to 15 ℃, Tewo is more than or equal to 55 ℃, the temperature lasts for 3S, and the unit automatically stops. And the unit can detect the water inlet temperature or the temperature of the water temperature box (water inlet temperature/temperature of the water temperature box) after being stopped and judge whether to restart the unit. If the inlet water temperature/water tank temperature reaches a set threshold (fixed value) for restarting the unit, for example, the inlet water temperature/water tank temperature is lower than the threshold temperature for restarting the unit, the unit is in accordance with the condition for restarting the unit, and the unit is restarted immediately, and the unit is in a restarting condition: a) ambient temperature Ta of the unit<At 5 ℃, the unit outlet water temperature Tewo<50 ℃ and the unit inlet water temperature Tewi is less than or equal to the unit inlet water temperature threshold TewidIf the time lasts for 3S, opening the press according to the principle of increasing the press; b) ta is more than or equal to 5 and less than 15 ℃, when Tewo is less than 55 ℃ and Tewi is more than or equal to TewidIf the time lasts for 3S, opening the press according to the principle of increasing the press; c) ta is more than or equal to 15 ℃ when Tewo<Tewi is not more than 50 DEG CdAnd (3) continuously opening the press according to the principle of increasing the press opening for 3S. The unit outlet water temperature is according to the shutdown condition after the unit is startedThe limit value (namely the maximum water outlet temperature threshold value) can be reached immediately, the unit can be stopped again and repeatedly, and the unit is started and stopped frequently.
In order to overcome the defects of the prior art, the invention provides a scheme for controlling the start and stop of the unit based on the correction of the water outlet temperature. Referring to fig. 1, fig. 1 is a main flow chart of an embodiment of a unit start-stop control method based on leaving water temperature correction according to the present invention.
And step S110, determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit.
In one embodiment, in the condition setting of determining whether the outlet water temperature of the unit is too high and then determining whether the unit is shut down, the ambient temperature of the unit may be divided into segments (temperature phases), and in each temperature phase of the ambient temperature, a current maximum outlet water temperature threshold (also called shutdown water temperature threshold Tewo) of the corresponding unit is setd) When the environmental temperature of the unit is in the corresponding temperature stage, if the outlet water temperature of the unit detected in real time reaches or exceeds the preset shutdown water temperature threshold value, the outlet water temperature of the unit is judged to be too high, and the unit needs to be shut down immediately; otherwise, the processing unit is not operated continuously.
Specifically, the set determines the judgment condition of unit shutdown according to the water outlet temperature: dividing the ambient temperature into a plurality of temperature phases; each temperature stage in the plurality of temperature stages is provided with a shutdown water temperature threshold value of the water outlet temperature of the corresponding unit; determining which temperature stage of a plurality of temperature stages the current ambient temperature of the unit belongs to, namely judging the temperature stage of the current ambient temperature; detecting the outlet water temperature of the unit in real time; comparing the detected outlet water temperature with a shutdown water temperature threshold value in the temperature stage corresponding to the current environment temperature, and judging whether the outlet water temperature is equal to or greater than the threshold value; if the temperature of the discharged water is equal to or greater than the set temperature, the discharged water is determined to be overhigh, otherwise, the discharged water is normal, and the running state of the unit is kept.
The highest outlet water temperature of the unit is controlled in a segmented mode according to the environment temperature, the compressor can be prevented from exceeding the operation range, the operation range of the compressor (the unit) can be limited more accurately, the compressor can be prevented from exceeding the operation range, and the operation space of the compressor can be exerted to the maximum extent.
And step S120, when the outlet water temperature of the unit is determined to be overhigh, the unit is automatically stopped, and the inlet water temperature of the unit when the unit is stopped due to overhigh outlet water temperature is detected to obtain the corrected temperature.
In one embodiment, when the outlet water temperature of the unit is judged to be equal to or exceed the shutdown water temperature threshold value of the ambient temperature of the unit in the corresponding temperature stage, it is determined that the outlet water temperature of the unit is too high, and at this time, the unit needs to be shutdown, for example, the unit is automatically shutdown immediately after the condition that the outlet water temperature is too high is confirmed to exceed 3 seconds. And when the machine is stopped, the water inlet temperature Tewi of the machine set when the machine is stopped (at the time of stopping) due to overhigh water outlet temperature can be detectedcAnd taking the inlet water temperature as a reference temperature Tewic. And further, recording the water inlet temperature of the unit at the temperature stage belonging to the current ambient temperature when the unit is shut down due to overhigh water temperature, and taking the recorded water inlet temperature as the reference temperature of the water inlet temperature of the unit which is corrected and started by the water outlet temperature when the unit is shut down. Further, for reference temperature TewicA correction is made, for example, the reference temperature minus 4 ℃.
By using the water inlet temperature Tewi when the unit is stopped due to the water outlet temperaturecAs reference temperature, and then passing the water inlet temperature Tewi and TewicJudging whether the unit is restarted or not by comparison; further, according to the inlet water temperature Tewi at the time of shutdowncAnd 4 ℃ temperature difference is reserved as a condition, so that the unit cannot be restarted immediately after being stopped due to overhigh outlet water temperature.
And step S130, after the unit is shut down, determining whether the unit can be restarted or not according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit and the correction temperature.
In one embodiment, the condition for determining whether to restart the unit according to the temperature of the inlet water is also set, and the ambient temperature of the unit can be divided into sections (temperature stages). In a preferred embodiment, the division of the ambient temperature into stages corresponds toThe stage division of the ambient temperature in the condition of determining whether to stop the machine according to the outlet water temperature is divided into the same temperature stages. At each temperature stage of the environment temperature, a corresponding current inlet water temperature threshold (also called a starting water temperature threshold Tewi) of the unit is setd) When the ambient temperature of the unit which is shut down (for example, in a standby state) is determined to be in the corresponding temperature stage, the water inlet temperature of the unit detected in real time is determined according to a reference temperature value detected when the unit is shut down in the corresponding temperature stage, namely the reference temperature TewicAnd a water inlet temperature threshold TewidAnd judging whether the condition of restarting the unit is met. Further, in making the judgment, the reference temperature Tewi is correctedcTherefore, the judgment of the detected inlet water temperature Tewi is corrected, and the inlet water temperature Tewi is combined with the threshold TewidIf the judgment result meets the restarting condition, the unit is started, otherwise, the unit continues to be in a standby state. In this way, the water inlet temperature Tewi of the unit when the unit is stopped due to the water outlet temperature is utilizedcAs reference temperature, through intake water temperature Tewi and TewicIn combination with the threshold value Tewi of the starting water temperaturedAnd whether the unit is restarted is judged.
Specifically, for example, a judgment condition for determining the restarting of the unit according to the water inlet temperature is set as follows: dividing the ambient temperature into a plurality of temperature stages, wherein the plurality of temperature stages correspond to a plurality of temperature stages of the shutdown judgment condition one by one, for example, the temperature stages are the same; each temperature phase of the plurality of temperature phases has a starting water temperature threshold Tewi of the inlet water temperature of the corresponding unitd(ii) a Determining which temperature stage of a plurality of temperature stages the current ambient temperature of the unit belongs to, namely judging the temperature stage of the current ambient temperature; detecting the water inlet temperature of the unit in real time in a standby state of the unit; corresponding to the temperature stage of the current environment temperature, the detected inlet water temperature and the reference temperature Tewi detected during shutdown in the temperature stagecThe corrected value obtained by subtracting 4 ℃ and the starting water temperature threshold TewidRespectively comparing the water inlet temperature with the water inlet temperature to determine whether the water inlet temperature is less than the correction value and less than or equal to the threshold Tewid(ii) a If yes, determining the inlet water temperatureAnd if the degree meets the condition of restarting the unit, the unit can be restarted, and if not, the unit is kept in a standby state (namely still stopped).
According to the scheme, the ambient temperature is divided into a plurality of stages, the highest water outlet temperature of the unit is controlled, the running range of the compressor is more accurately limited, the compressor can be prevented from exceeding the running range, and the running space of the compressor can be furthest exerted; and then corresponding to a plurality of stages of subdivided environment temperatures, utilizing the water inlet temperature Tewi when the unit is stopped due to the water outlet temperaturecAs reference temperature, and then passing the water inlet temperature Tewi and TewicJudging whether the unit is restarted or not by comparison; further, according to the inlet water temperature Tewi at the time of shutdowncThe temperature difference of 4 ℃ is reserved as a condition, so that the unit can not be restarted immediately after being stopped due to overhigh outlet water temperature, and the unit can be adaptive to various environment temperatures, various water flows and various inlet and outlet water temperature differences of the unit, and can be prevented from being started and stopped frequently even if the inlet and outlet water temperature differences of the unit are large; in addition, a return difference of 4 ℃ is reserved, and the unit can be ensured not to be started immediately after the unit is stopped due to overhigh water outlet temperature.
It should be noted that, although the foregoing embodiments describe each step in a specific sequence, those skilled in the art will understand that, in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such a sequence, and they may be executed simultaneously (in parallel) or in other sequences, and these changes are all within the protection scope of the present invention.
Referring to fig. 2, a structural block diagram of an embodiment of the system for controlling start and stop of a plant set based on outlet water temperature correction according to the present invention will be further described. The system at least comprises:
the shutdown module 210 determines whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit.
In one embodiment, in the condition setting of determining whether the temperature of the outlet water of the unit is too high and further determining whether the unit is stopped, the ambient temperature of the unit can be divided into sections (temperature stages), and each ring is provided with a plurality of ringsIn the temperature stage of the ambient temperature, a corresponding current maximum outlet water temperature threshold (also called shutdown water temperature threshold Tewo) of the unit is setd) When the environmental temperature of the unit is in the corresponding temperature stage, if the outlet water temperature of the unit detected in real time reaches or exceeds the preset shutdown water temperature threshold value, the outlet water temperature of the unit is judged to be too high, and the unit needs to be shut down immediately; otherwise, the processing unit is not operated continuously.
Specifically, the set determines the judgment condition of unit shutdown according to the water outlet temperature: dividing the ambient temperature into a plurality of temperature phases; each temperature stage in the plurality of temperature stages is provided with a shutdown water temperature threshold value of the water outlet temperature of the corresponding unit; determining which temperature stage of a plurality of temperature stages the current ambient temperature of the unit belongs to, namely judging the temperature stage of the current ambient temperature; detecting the outlet water temperature of the unit in real time; comparing the detected outlet water temperature with a shutdown water temperature threshold value in the temperature stage corresponding to the current environment temperature, and judging whether the outlet water temperature is equal to or greater than the threshold value; if the temperature of the discharged water is equal to or greater than the set temperature, the discharged water is determined to be overhigh, otherwise, the discharged water is normal, and the running state of the unit is kept.
The highest outlet water temperature of the unit is controlled in a segmented mode according to the environment temperature, the compressor can be prevented from exceeding the operation range, the operation range of the compressor (the unit) can be limited more accurately, the compressor can be prevented from exceeding the operation range, and the operation space of the compressor can be exerted to the maximum extent.
And a correction module 220, configured to automatically stop the unit when it is determined that the outlet water temperature of the unit is too high, and detect the inlet water temperature of the unit when the unit is stopped due to the current too high outlet water temperature to obtain a corrected temperature.
In one embodiment, when the outlet water temperature of the unit is judged to be equal to or exceed the shutdown water temperature threshold value of the ambient temperature of the unit in the corresponding temperature stage, it is determined that the outlet water temperature of the unit is too high, and at this time, the unit needs to be shutdown, for example, the unit is automatically shutdown immediately after the condition that the outlet water temperature is too high is confirmed to exceed 3 seconds. While the machine is stopped, the machine can detect the time (stop moment) when the machine is stopped because the temperature of the outlet water is overhighInlet water temperature Tewi of the unitcAnd taking the inlet water temperature as a reference temperature Tewic. And further, recording the water inlet temperature of the unit at the temperature stage belonging to the current ambient temperature when the unit is shut down due to overhigh water temperature, and taking the recorded water inlet temperature as the reference temperature of the water inlet temperature of the unit which is corrected and started by the water outlet temperature when the unit is shut down. Further, for reference temperature TewicA correction is made, for example, the reference temperature minus 4 ℃.
By using the water inlet temperature Tewi when the unit is stopped due to the water outlet temperaturecAs reference temperature, and then passing the water inlet temperature Tewi and TewicJudging whether the unit is restarted or not by comparison; further, according to the inlet water temperature Tewi at the time of shutdowncAnd 4 ℃ temperature difference is reserved as a condition, so that the unit cannot be restarted immediately after being stopped due to overhigh outlet water temperature.
And the starting module 230 determines whether the unit can be restarted or not according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit and the correction temperature after the unit is stopped.
In one embodiment, the condition for determining whether to restart the unit according to the temperature of the inlet water is also set, and the ambient temperature of the unit can be divided into sections (temperature stages). In a preferred example, the ambient temperature staging corresponds to the ambient temperature staging in the condition of determining whether to stop the machine according to the outlet water temperature, i.e., the staging into the same temperature stages. At each temperature stage of the environment temperature, a corresponding current inlet water temperature threshold (also called a starting water temperature threshold Tewi) of the unit is setd) When the ambient temperature of the unit which is shut down (for example, in a standby state) is determined to be in the corresponding temperature stage, the water inlet temperature of the unit detected in real time is determined according to a reference temperature value detected when the unit is shut down in the corresponding temperature stage, namely the reference temperature TewicAnd a water inlet temperature threshold TewidAnd judging whether the condition of restarting the unit is met. Further, in making the judgment, the reference temperature Tewi is correctedcTherefore, the judgment of the detected inlet water temperature Tewi is corrected, and the inlet water temperature Tewi is combined with the threshold TewidIs judged byAnd starting the unit if the restarting condition is met, otherwise, continuing the standby state of the unit. In this way, the water inlet temperature Tewi of the unit when the unit is stopped due to the water outlet temperature is utilizedcAs reference temperature, through intake water temperature Tewi and TewicIn combination with the threshold value Tewi of the starting water temperaturedAnd whether the unit is restarted is judged.
Specifically, for example, a judgment condition for determining the restarting of the unit according to the water inlet temperature is set as follows: dividing the ambient temperature into a plurality of temperature stages, wherein the plurality of temperature stages correspond to a plurality of temperature stages of the shutdown judgment condition one by one, for example, the temperature stages are the same; each temperature phase of the plurality of temperature phases has a starting water temperature threshold Tewi of the inlet water temperature of the corresponding unitd(ii) a Determining which temperature stage of a plurality of temperature stages the current ambient temperature of the unit belongs to, namely judging the temperature stage of the current ambient temperature; detecting the water inlet temperature of the unit in real time in a standby state of the unit; corresponding to the temperature stage of the current environment temperature, the detected inlet water temperature and the reference temperature Tewi detected during shutdown in the temperature stagecThe corrected value obtained by subtracting 4 ℃ and the starting water temperature threshold TewidRespectively comparing the water inlet temperature with the water inlet temperature to determine whether the water inlet temperature is less than the correction value and less than or equal to the threshold Tewid(ii) a If yes, the unit can be restarted after the water inlet temperature is determined to meet the condition of restarting the unit, and if not, the unit is kept in a standby state (namely still stopped).
According to the scheme, the ambient temperature is divided into a plurality of stages, the highest water outlet temperature of the unit is controlled, the running range of the compressor is more accurately limited, the compressor can be prevented from exceeding the running range, and the running space of the compressor can be furthest exerted; and then corresponding to a plurality of stages of subdivided environment temperatures, utilizing the water inlet temperature Tewi when the unit is stopped due to the water outlet temperaturecAs reference temperature, and then passing the water inlet temperature Tewi and TewicJudging whether the unit is restarted or not by comparison; further, according to the inlet water temperature Tewi at the time of shutdowncThe temperature difference of 4 ℃ is reserved as a condition to ensure that the unit cannot be restarted immediately after shutdown due to overhigh outlet water temperature, so thatThe device is adaptive to various environment temperatures, various water flows and various water inlet and outlet temperature differences of the unit, and can prevent the unit from being started and stopped frequently even if the water inlet and outlet temperature differences of the unit are large; in addition, a return difference of 4 ℃ is reserved, and the unit can be ensured not to be started immediately after the unit is stopped due to overhigh water outlet temperature.
The embodiment of the present invention will be further described with reference to a preferred embodiment.
The existing control condition is that the temperature difference of inlet and outlet water of the unit is assumed to be 5 ℃ under the normal condition, and the outlet water temperature threshold (shutdown water temperature threshold) Tewo under the conditiondAnd the inlet water temperature threshold (starting water temperature threshold Tewi)d) And only the difference is 5 ℃, and whether the unit is restarted is judged according to the inlet water temperature of the unit and the set threshold value directly. However, when the water flow of the unit is small or the environmental temperature is high, the water inlet and outlet temperature difference of the unit is large, and the unit can be started and stopped frequently. For example, the ambient temperature Ta is 5 ℃ and the unit setting TewidThe temperature is 55 ℃, and the water flow of the unit is smaller at the moment; the actual temperature difference between the inlet water and the outlet water of the unit is changed to 10 ℃ due to the special condition, namely when Tewi is 45 ℃, Tewo is already 55 ℃, the condition of the example a) is met, and the unit is stopped; after the unit is shut down, heating is stopped, the temperature of inlet and outlet water of the unit tends to be the same, namely Tewi is 45 ℃, and the temperature of Ta is 5 ℃ and Tewo is less than 50 ℃ (namely Tewo is less than Tewo)d) And TewidAt 55 deg.C and Tewi < TewidWhen the unit is started immediately and the heating effect is the same (the environmental temperature, the working condition, the circulating water quantity and the like are unchanged and the heating quantity is unchanged) after the unit is restarted, the Tewi is still 45 ℃ at present, the outlet water temperature Tewo reaches 55 ℃ immediately, the unit is stopped again, and the operation is repeated, so that the unit is frequently started and stopped. Due to the design, only conditions (such as water inlet and outlet temperature difference of 5 ℃) are set by considering the condition of water temperature in the working condition, the change of the water inlet and outlet temperature difference caused by water flow, environmental conditions and the like is not considered, the condition application range is narrow, and once the working condition is slightly changed, the unit is repeatedly and frequently started and stopped.
In this regard, according to the above aspect of the present invention, in a preferred example, first, the maximum outlet water temperature is controlled in stages according to the ambient temperature, and the following stages and the stop condition may be set by accurately limiting the operation range of the compressor. The standby (shutdown) condition of overhigh water outlet temperature of the unit is as follows:
A. when Ta is less than-10 ℃ and Tewo is more than or equal to 50 ℃, 3S is continued, and the unit is automatically stopped;
B. when Ta is more than or equal to-10 and less than or equal to 0 ℃, and Tewo is more than or equal to 55 ℃, 3S is continued, and the unit is automatically stopped;
C. when Ta is more than 0 and less than 22 ℃, the effluent temperature is more than or equal to 60 ℃, the process lasts for 3S, and the unit automatically stops;
D. when the temperature of Ta is more than or equal to 22 and less than 45 ℃, the water outlet temperature is more than or equal to 55 ℃, the water outlet temperature lasts for 3S, and the unit automatically stops;
E. when the temperature of Ta is more than or equal to 45 ℃, the outlet water temperature is more than or equal to 50 ℃, the temperature lasts for 3S, and the unit automatically stops.
Ta is the current ambient temperature of the unit; tewo is the detected outlet water temperature of the unit, TewodThe highest water outlet temperature is the shutdown water temperature threshold (50 ℃, 55 ℃, 60 ℃, 55 ℃ and 50 ℃ in sequence in each temperature stage). And subdividing a plurality of environmental temperature stages and subdividing corresponding outlet water temperature limit thresholds. In this example, the highest temperature control of the outlet water temperature is performed in five temperature stages from A to E, which is more accurate. When the ambient temperature is below-10 ℃, the outlet water temperature exceeds 50 ℃ (the highest outlet water temperature is the threshold Tewo)d) And the machine is automatically stopped immediately after 3 seconds; when the environmental temperature is between-10 ℃ and 0 ℃, the water outlet temperature exceeds 55 ℃ and lasts for 3 seconds, and then the machine is immediately and automatically stopped; when the environmental temperature is between 0 ℃ and 22 ℃, the water outlet temperature exceeds 60 ℃ and is immediately and automatically stopped after lasting for 3 seconds; when the environmental temperature is between 22 ℃ and 45 ℃, the effluent temperature exceeds 55 ℃ and is immediately and automatically stopped for 3 seconds; and when the ambient temperature is above 45 ℃, the outlet water temperature exceeds 50 ℃ and is immediately and automatically stopped for 3 seconds.
Wherein, at the time of shutdown, the water inlet temperature Tewi corresponding to the water outlet temperature reaching the shutdown condition at each corresponding temperature stage is detectedcStored as a reference temperature, and set a 4 deg.C temperature difference (the 4 deg.C temperature difference is the reference temperature when the machine is stopped due to the outlet water temperature and the stop temperatureThe return difference of the inlet water temperature detected later) is subtracted from the reference temperature to form a corrected temperature value (corrected value). The reference temperature TewicNamely the correction of the water outlet temperature to the water inlet temperature during the shutdown.
Then, after the unit is shut down, the outlet water temperature is gradually reduced, for example, to the inlet water temperature. And detecting the condition of the inlet water temperature in real time so as to start the unit to heat at a proper time. In a preferred example, the set unit start-up conditions after the unit is standby due to the overhigh outlet water temperature are as follows:
A. when Ta is less than-10 deg.C, Tewi is less than Tewic-4 and Tewi ≦ TewidContinuously starting the unit for 3S;
B. ta of-10 or more and 0 or less, when Tewi is less than Tewic-4 and Tewi ≦ TewidContinuously starting the unit for 3S;
C. ta is more than 0 and less than 22 ℃, and Tewi is less than Tewic-4 and Tewi ≦ TewidContinuously starting the unit for 3S;
D. ta of 22-45 deg.C, Tewi-45 deg.Cc-4 and Tewi ≦ TewidContinuously starting the unit for 3S;
E. when Tewi is less than Tewi when Ta is more than or equal to 45 DEG Cc-4 and Tewi ≦ TewidAnd (4) continuously starting the unit for 3S.
Ta is the current ambient temperature of the unit; tewi is the detected water inlet temperature of the unit in the standby state after shutdown; tewidA threshold value for starting water temperature; reference temperature TewicThe inlet water temperature corresponding to the outlet water temperature of the shutdown at the shutdown moment is corrected to be 4 ℃. And subdividing a plurality of environmental temperature stages and subdividing corresponding inlet water temperature limit thresholds. In this example, the temperature control system is divided into five temperature stages from A to E and a temperature stage for subdividing the environmental temperature completely corresponding to shutdown, and the control of the inlet water temperature is performed respectively, so that the control is more accurate. In each temperature phase, the inlet water temperature is lower than (equal to or less than) a starting water temperature threshold Tewi which can start the current environment temperature of the unit in the temperature phasedAnd simultaneously lower (less than) the correction temperature TewicAnd 4, after 3 seconds, the unit can be automatically started to operate.
For example, if TewidAt 55 ℃, Ta ═ 5 ℃, in stage B; stopping when Tewo is 55 ℃ and measuring Tewi at the same timec45 ℃; if the Tewi is kept at 45 ℃, the Tewi is reduced to 45 ℃ after the Tewo is stopped, and the Tewi is smaller than the Tewi in the stage BdBut greater than Tewic4, keeping the unit in a standby state without starting the unit at 41 ℃; waiting until the detected Tewi is reduced to 40 ℃ along with the ambient temperature (generally Tewi is reduced to 40 ℃), and in the stage B, the Tewi is smaller than the TewidAnd is less than TewicAnd 4, and lasting for 3 seconds, automatically starting the unit to run. Before starting, obviously the unit keeps a standby state for a longer time, and after starting, the unit is obviously operated to 50 ℃ without stopping immediately when the condition that the temperature difference between inlet water and outlet water is 10 ℃ and the unit is stopped is achieved. Therefore, the condition that the unit is started and stopped frequently is greatly reduced. And can adapt to various special situations or situations which change from normal situations (such as the common situation of the prior art that the temperature difference of inlet and outlet water is small, for example, the situation of 5 ℃), and the expandability is strong. From the preferred embodiment, even if the temperature difference between the inlet and outlet water is large under special conditions (small flow and high ambient temperature), and the difference between the inlet and outlet water temperature thresholds at each stage is still set (such as the difference of 5 ℃), the temperature Tewi can be correctedcAnd-4, automatically opening the difference between the shutdown water temperature threshold and the starting water temperature threshold corresponding to each of the five stages set in the starting and stopping conditions, so as to avoid repeatedly starting and stopping the unit.
Therefore, after the air source heat pump heating unit or the air source heat pump hot water unit stops the unit due to overhigh outlet water temperature at different environmental temperatures in order to prevent the compressor from exceeding the operating range, the control method for restarting the unit is set according to the inlet water temperature after the stop corrected by the inlet water temperature corresponding to the outlet water temperature during the stop, and the unit can be effectively prevented from being frequently started and stopped. In particular, the air source heat pump heating unit or the air source heat pump hot water unit limits the highest outlet water temperature of the unit, when the outlet water temperature of the unit is overhigh, the unit can be stopped, the condition that the unit is started again after being stopped can be judged according to the inlet water temperature, when the unit is stopped due to overhigh outlet water temperature, the water inlet temperature or the water tank temperature of the unit is different due to different ring temperatures and different water flows, if the unit judges whether the unit is restarted or not according to the water inlet temperature or the water tank temperature, the unit is stopped again due to overhigh water outlet temperature after the unit is started, thereby causing the frequent start and stop of the unit, the invention refers to the water inlet temperature when the stop is carried out due to the overhigh water outlet temperature, the water inlet temperature after the shutdown is corrected according to the judgment condition, the unit is controlled to be restarted, the shutdown caused by overhigh water outlet temperature of the unit immediately after the unit is started is prevented, and the unit is prevented from being frequently started and stopped. The scheme of the invention solves the problem of how to avoid frequently starting and stopping the compressor unit, and ensures the effective operation and safe use of the compressor unit.
Further, the device with the heating unit or the hot water unit comprises the components and the processing function of each system.
Further, in an embodiment of a control device of the present invention, the device includes at least: the processing unit is connected with the storage unit, a program capable of executing the unit start-stop control method based on the water outlet temperature is stored in the storage unit, and when the unit is controlled to start and stop according to the detected water inlet temperature or water outlet temperature, the processing unit calls the program in the storage unit to execute the steps of the method.
It will be understood by those skilled in the art that all or part of the flow of the method according to the above-described embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used to implement the steps of the above-described embodiments of the method when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying said computer program code, media, usb disk, removable hard disk, magnetic diskette, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunication signals, software distribution media, etc. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Further, it should be understood that, since the modules are only configured to illustrate the functional units of the system of the present invention, the corresponding physical devices of the modules may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor. Thus, the number of individual modules in the figures is merely illustrative.
Those skilled in the art will appreciate that the various modules in the system may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.
So far, the technical solution of the present invention has been described with reference to one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A unit start-stop control method based on water outlet temperature correction is characterized by comprising the following steps:
determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit;
when the outlet water temperature of the unit is determined to be too high, the unit is automatically stopped, and the inlet water temperature of the unit corresponding to the current outlet water temperature is detected to obtain a corrected temperature;
and determining whether the unit can be restarted or not by combining the corrected temperature according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped.
2. The method according to claim 1, wherein the determining whether the outlet water temperature of the unit is too high according to the outlet water temperature of the unit detected in real time at the temperature stage of the current ambient temperature of the unit specifically includes:
dividing the ambient temperature into a plurality of temperature stages, and correspondingly setting a shutdown water temperature threshold value of the unit in each temperature stage;
comparing the outlet water temperature of the unit detected in real time with the shutdown water temperature threshold;
and if the water temperature is larger than or equal to the shutdown water temperature threshold value, the outlet water temperature and the outlet water temperature are too high.
3. The method according to claim 2, wherein the determining whether the unit can be restarted according to the inlet water temperature of the unit detected in real time in the temperature phase of the current ambient temperature detected after the unit is shut down and in combination with the corrected temperature specifically includes:
correspondingly setting a starting water temperature threshold value of the unit in each divided temperature stage of the plurality of temperature stages after the unit is shut down due to overhigh outlet water temperature;
and comparing the inlet water temperature of the unit detected in real time with the corrected temperature and the starting water temperature threshold, and restarting the unit if the unit starting condition is met.
4. The method according to claim 3, wherein the step of stopping the machine while detecting the water inlet temperature of the unit corresponding to the current outlet water temperature to obtain the corrected temperature specifically includes:
and in each temperature stage, the inlet water temperature of the unit corresponding to the current outlet water temperature detected when the unit is stopped due to overhigh outlet water temperature is taken as a reference temperature, and a temperature difference value is subtracted from the reference temperature to be taken as a correction temperature.
5. The method of claim 4, wherein,
the 'multiple temperature stages', 'shutdown water temperature threshold' and 'startup water temperature threshold' specifically include: when judging whether the unit is stopped or started, dividing a plurality of temperature stages divided by the ambient temperature of the unit into five temperature stages which respectively correspond to five stopping water temperature thresholds and five starting water temperature thresholds;
the "subtracting a temperature difference value from the reference temperature as a correction temperature" specifically includes: the temperature difference subtracted from the reference temperature is 4 ℃;
"real-time detection the unit the temperature of intaking with revise the temperature and start the temperature threshold value and compare, if accord with unit start condition then restart the unit", specifically include: and in the corresponding temperature stage, if the comparison result is that the water inlet temperature of the unit detected in real time is smaller than the correction temperature and smaller than or equal to the starting water temperature threshold value, and the unit is judged to be in accordance with the unit starting condition, restarting the unit.
6. The utility model provides a unit opens and stops control system based on leaving water temperature is revised which characterized in that includes:
the shutdown module is used for determining whether the water outlet temperature of the unit is too high according to the water outlet temperature of the unit detected in real time at the temperature stage of the current environment temperature of the unit;
the correction module is used for automatically stopping the unit when the outlet water temperature of the unit is determined to be too high, and detecting the inlet water temperature of the unit corresponding to the current outlet water temperature to obtain a corrected temperature;
and the starting module is used for determining whether the unit can be restarted or not according to the water inlet temperature of the unit detected in real time at the temperature stage of the current environment temperature after the unit is stopped and in combination with the corrected temperature.
7. The system of claim 6, wherein,
the shutdown module specifically comprises: dividing the ambient temperature into a plurality of temperature stages, and correspondingly setting a shutdown water temperature threshold value of the unit in each temperature stage; comparing the outlet water temperature of the unit detected in real time with the shutdown water temperature threshold; if the water temperature is larger than or equal to the shutdown water temperature threshold value, the outlet water temperature and the outlet water temperature are too high;
the correction module specifically comprises: taking the water inlet temperature of the unit corresponding to the current water outlet temperature detected while the unit is shut down due to overhigh water outlet temperature as a reference temperature at each temperature stage, and subtracting a temperature difference value from the reference temperature to obtain a corrected temperature;
the starting module specifically comprises: correspondingly setting a starting water temperature threshold value of the unit in each divided temperature stage of the plurality of temperature stages after the unit is shut down due to overhigh outlet water temperature; and comparing the inlet water temperature of the unit detected in real time with the corrected temperature and the starting water temperature threshold, and restarting the unit if the unit starting condition is met.
8. The system of claim 7, wherein,
the 'multiple temperature stages', 'shutdown water temperature threshold' and 'startup water temperature threshold' specifically include: when judging whether the unit is stopped or started, dividing a plurality of temperature stages divided by the ambient temperature of the unit into five temperature stages which respectively correspond to five stopping water temperature thresholds and five starting water temperature thresholds;
the "subtracting a temperature difference value from the reference temperature as a correction temperature" specifically includes: the temperature difference subtracted from the reference temperature is 4 ℃;
the starting module specifically further comprises: and in the corresponding temperature stage, if the comparison result is that the water inlet temperature of the unit detected in real time is smaller than the correction temperature and smaller than or equal to the starting water temperature threshold value, and the unit is judged to be in accordance with the unit starting condition, restarting the unit.
9. Device with heating unit/hot water unit, characterized in that it comprises a unit start-stop control system based on leaving water temperature correction according to claims 5 to 8.
10. A control device, characterized by comprising a processing unit, a storage unit connected with the processing unit, the storage unit storing a program capable of executing the steps of the set start-stop control method based on leaving water temperature correction according to claims 1 to 5, the processing unit being capable of calling the program and executing the steps of the method according to claims 1 to 5.
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| CN202010179838.7A CN113390125A (en) | 2020-03-13 | 2020-03-13 | Unit start-stop control method, system and device based on water outlet temperature correction |
| PCT/CN2020/126440 WO2021179644A1 (en) | 2020-03-13 | 2020-11-04 | Water outlet temperature correction-based unit starting/stopping control method, system and apparatus |
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| CN202010179838.7A CN113390125A (en) | 2020-03-13 | 2020-03-13 | Unit start-stop control method, system and device based on water outlet temperature correction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776198A (en) * | 2021-09-22 | 2021-12-10 | 新奥数能科技有限公司 | Start-stop state control method and device for gas boiler heat supply unit |
| CN114791189A (en) * | 2022-05-17 | 2022-07-26 | 深圳市英维克科技股份有限公司 | Control method, device, equipment and system of cooling system and storage medium |
Families Citing this family (1)
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|---|---|---|---|---|
| CN115324751A (en) * | 2022-08-04 | 2022-11-11 | 潍柴动力股份有限公司 | Control method and device for large-cylinder-diameter engine, electronic device and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710905C1 (en) * | 1997-03-15 | 1998-07-02 | Robert Mack | Room heating system operating method |
| CN102200335A (en) * | 2011-05-13 | 2011-09-28 | 珠海铨高机电设备有限公司 | Modular cold/ hot water unit energy-regulating control system and control method |
| WO2012032787A1 (en) * | 2010-09-10 | 2012-03-15 | パナソニック株式会社 | Heat medium circulation type heat pump heater |
| CN103884104A (en) * | 2012-12-21 | 2014-06-25 | 珠海格力电器股份有限公司 | Control method, control device, controller and control system based on heat pump water heater |
| CN104764170A (en) * | 2015-04-24 | 2015-07-08 | 珠海格力电器股份有限公司 | Heat pump starting and stopping control method and device and air conditioner |
| CN105222361A (en) * | 2015-10-29 | 2016-01-06 | 海信（山东）空调有限公司 | A kind of heat-pump water heater control method, device and Teat pump boiler |
| CN108692461A (en) * | 2017-04-11 | 2018-10-23 | 青岛海尔新能源电器有限公司 | A kind of Teat pump boiler reheating control method |
| CN110486914A (en) * | 2019-08-21 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of control method of Hot water units, device and Hot water units |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008202809A (en) * | 2007-02-16 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Heat pump type water heater |
| CN103808012B (en) * | 2012-11-13 | 2016-06-08 | 珠海格力电器股份有限公司 | Frequency change water heater and control method thereof |
| CN204202260U (en) * | 2014-10-08 | 2015-03-11 | 东莞信易电热机械有限公司 | A kind of smart temperature control wind-cooled cold-water machine |
| CN107560255B (en) * | 2017-08-23 | 2018-11-30 | 珠海格力电器股份有限公司 | Heat pump unit and its control method |
-
2020
- 2020-03-13 CN CN202010179838.7A patent/CN113390125A/en active Pending
- 2020-11-04 WO PCT/CN2020/126440 patent/WO2021179644A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710905C1 (en) * | 1997-03-15 | 1998-07-02 | Robert Mack | Room heating system operating method |
| WO2012032787A1 (en) * | 2010-09-10 | 2012-03-15 | パナソニック株式会社 | Heat medium circulation type heat pump heater |
| CN102200335A (en) * | 2011-05-13 | 2011-09-28 | 珠海铨高机电设备有限公司 | Modular cold/ hot water unit energy-regulating control system and control method |
| CN103884104A (en) * | 2012-12-21 | 2014-06-25 | 珠海格力电器股份有限公司 | Control method, control device, controller and control system based on heat pump water heater |
| CN104764170A (en) * | 2015-04-24 | 2015-07-08 | 珠海格力电器股份有限公司 | Heat pump starting and stopping control method and device and air conditioner |
| CN105222361A (en) * | 2015-10-29 | 2016-01-06 | 海信（山东）空调有限公司 | A kind of heat-pump water heater control method, device and Teat pump boiler |
| CN108692461A (en) * | 2017-04-11 | 2018-10-23 | 青岛海尔新能源电器有限公司 | A kind of Teat pump boiler reheating control method |
| CN110486914A (en) * | 2019-08-21 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of control method of Hot water units, device and Hot water units |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113776198A (en) * | 2021-09-22 | 2021-12-10 | 新奥数能科技有限公司 | Start-stop state control method and device for gas boiler heat supply unit |
| CN114791189A (en) * | 2022-05-17 | 2022-07-26 | 深圳市英维克科技股份有限公司 | Control method, device, equipment and system of cooling system and storage medium |
| CN114791189B (en) * | 2022-05-17 | 2024-03-12 | 深圳市英维克科技股份有限公司 | Control method, device, equipment, system and storage medium of cooling system |
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| WO2021179644A1 (en) | 2021-09-16 |
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