CN114118465A - Anti-freezing control method and device for solution, electronic equipment and storage device - Google Patents
Anti-freezing control method and device for solution, electronic equipment and storage device Download PDFInfo
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Abstract
The invention discloses a method and a device for controlling solution anti-freezing, electronic equipment and a storage device, and relates to the technical field of solution anti-freezing. The method comprises the following steps: detecting solution parameters and flow information of a solution in an open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value; determining an ice point value of the solution according to the solution density value, and determining a first temperature difference value according to the solution temperature and the ice point value; determining the flow rate reduction rate of the solution according to the flow information; determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference and/or the flow reduction rate; and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system. According to the anti-freezing control method for the solution, the shutdown control operation is executed on the open heat source tower heat pump system, so that the effect of preventing the solution from freezing is achieved, and the damage of the open heat source tower heat pump system caused by the freezing of the solution is further avoided.
Description
Technical Field
The invention relates to the technical field of solution antifreezing, in particular to an antifreezing control method and device for a solution, electronic equipment and a storage device.
Background
With the promulgation of the dual-carbon policy, the application of the heat source tower heat pump system in a heat supply system is gradually increased as a renewable energy supply mode. When heating in winter, after the anti-freezing solution in the open heat source tower heat pump system absorbs moisture, the concentration of the solution is reduced, the freezing point is increased, the risk of freezing the solution exists, and the system is easily damaged.
At present, the traditional heat source tower heat pump system technology generally adopts and gathers solution density through the densimeter, calculates the solution freezing point, compares with solution temperature, monitors whether the solution freezing point satisfies the demand, makes the operation of system safety. However, in the open heat source tower heat pump system, the solution directly contacts with the air, and except for containing the antifreeze, other impurities can be blended into the solution, so that the density acquisition accuracy can be affected, the detected freezing point value of the solution is deviated, and the risk of freezing the solution is caused.
Disclosure of Invention
In view of the above, the present invention has been made to provide a method, an apparatus, an electronic device, and a storage apparatus for controlling freeze prevention of a solution that overcome or at least partially solve the above problems.
The invention provides a solution anti-freezing control method, which is applied to an open heat source tower heat pump system and comprises the following steps:
detecting solution parameters and flow information of a solution in an open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value;
determining a freezing point value of the solution according to the solution density value, and determining a first temperature difference value according to the solution temperature and the freezing point value;
determining the flow rate reduction rate of the solution according to the flow information;
determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate;
and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system.
Preferably, the step of determining the state of the solution in the open heat source tower heat pump system according to the first temperature difference comprises:
judging whether the first temperature difference value is larger than a first temperature threshold value or not;
if the first temperature difference value is not larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state;
and if the first temperature difference value is larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
Preferably, the step of determining the solution state in the open heat source tower heat pump system according to the flow rate reduction rate comprises:
judging whether the flow rate reduction rate of the solution is greater than a flow rate reduction rate threshold value or not;
when the flow rate reduction rate of the solution is larger than a flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state;
and when the flow rate reduction rate of the solution is not greater than the flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
Preferably, the open heat source tower heat pump system comprises a water pump, a fan and an environmental dry bulb, and the method further comprises:
detecting the temperature of the environmental dry bulb;
after the open heat source tower heat pump system is shut down and controlled, the working frequency of the water pump and the fan is adjusted to the maximum frequency;
and executing a first control operation according to the difference value between the temperature of the environmental dry ball and the temperature of the solution.
Preferably, the step of the first control operation includes,
determining a second temperature difference between the ambient dry bulb temperature and the temperature of the solution;
when the second temperature difference is not smaller than a second temperature threshold value, stopping the water pump;
and when the water pump stop time reaches the second preset time, stopping the fan.
Preferably, the flow information includes a first flow value and a second flow value,
detecting flow information of a solution in an open heat source tower heat pump system, including,
measuring a first flow value of the solution when the running time of the water pump reaches a first preset time;
periodically measuring a second flow value of the solution after the water pump operates for a first preset time;
determining a rate of flow reduction of the solution from the flow information, comprising:
determining a flow rate difference between the first flow rate value and the second flow rate value;
and determining the flow rate reduction rate of the solution according to the flow rate difference value and the first flow rate value.
Preferably, the method further comprises detecting the first flow rate value again when the operating frequency of the water pump changes.
The invention provides a device of a solution anti-freezing control method, which is applied to an open heat source tower heat pump system and comprises,
the detection module is used for detecting solution parameters and flow information of a solution in the open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value.
The analysis module is used for determining an ice point value of the solution according to the solution density value and determining a first temperature difference value according to the solution temperature and the ice point value; determining the flow rate reduction rate of the solution according to the flow information; determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate; and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system.
The present invention provides an electronic device, including:
one or more processors;
a memory;
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the methods of any of the above.
The present invention provides a computer readable storage medium storing a computer program for use in conjunction with an electronic device, the computer program being executable by a processor to perform the method of any of the above.
In the scheme of the invention, the invention provides a solution anti-freezing control method which is applied to an open heat source tower heat pump system, and the method comprises the following steps: detecting solution parameters and flow information of a solution in an open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value; determining a freezing point value of the solution according to the solution density value, and determining a first temperature difference value according to the solution temperature and the freezing point value; determining the flow rate reduction rate of the solution according to the flow information; determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate; and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system. According to the anti-freezing control method for the solution, the shutdown control operation is executed on the open heat source tower heat pump system, so that the effect of preventing the solution from freezing is achieved, and the damage of the open heat source tower heat pump system caused by the freezing of the solution is further avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings.
In the drawings:
FIG. 1 is a flow chart illustrating the steps of a method for controlling the freezing point of a solution according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for determining a solution state in an open heat source tower heat pump system based on a first temperature difference, according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating steps for determining a solution status in an open heat source tower heat pump system based on a rate of flow reduction according to an embodiment of the present invention;
FIG. 4 is a flowchart of a step of determining a flow rate reduction rate of a solution according to flow rate information according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps performed after shutdown operations are performed in an open heat source tower system according to an embodiment of the present invention;
FIG. 6 is a block diagram of a solution antifreeze control method and apparatus according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, an antifreeze control method for a solution provided by an embodiment of the present invention is shown, which is applied to an open heat source tower heat pump system, and the method includes:
In the embodiment of the invention, the solution parameters and the flow information of the solution in the open heat source tower heat pump system are detected, wherein the solution parameters comprise the solution temperature T2 and the solution density value rho.
In the embodiment of the present invention, the freezing Point (Ice Point) means that water is at a standard atmospheric pressure (1.013 × 10)^Freezing point at 5Pa), i.e. 0 ℃ (273K), i.e. the temperature at which water changes from liquid to solid. The freezing point of purified water is 0 ℃ at standard atmospheric pressure, and the freezing point of water is related to impurities contained in the water. The density of the impurities contained in the water is different according to the impurities. Due to different densities of different solutions, the freezing point values of different solutions are different, and formulas for calculating the freezing point values are also different. According to the solution density value rho detected in real time and the freezing point value T corresponding to the solution density value rho1As calculated by the following equation 1,
T1formula 1 of axρ + B
Wherein rho is the solution density value, T1The solution density value ρ corresponds to the value of the ice point, a being a constant 1 and B being a constant 2.
In one example, A is 0.124 and B is 127.248, the freezing point T corresponding to the solution density value ρ1As calculated by the following equation 2,
T1-0.124 × ρ +127.248 equation 2
Wherein rho is the solution density value, T1The freezing point value corresponding to the solution density value ρ is only one way of calculating the freezing point value in this example, and should not be construed as limiting the calculation of the freezing point value and the freezing point value.
And 103, determining the flow rate reduction rate of the solution according to the flow rate information.
In the embodiment of the invention, the flow reduction rate is calculated through the detected flow information.
And 104, determining the state of the solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow rate reduction rate.
And 105, when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system.
In the embodiment of the invention, the first temperature difference, the flow rate reduction rate, the first temperature difference and the flow rate reduction rate can be respectively used. And determining the solution state in the open heat source tower heat pump system, judging the solution state to be a freezing risk state when the first temperature difference value is not greater than the first temperature threshold value, and executing shutdown control operation on the open heat source tower heat pump system. And when the flow rate reduction rate of the solution is greater than the flow rate reduction rate threshold value, judging that the solution state is a freezing risk state, and executing shutdown control operation on the open heat source tower heat pump system. Because the solution forms less ice crystal particles, the ice crystal particles flow along with the solution, the flow velocity of the solution is reduced, the flow of the solution is further reduced, and when the flow reduction rate of the solution is greater than the flow reduction rate threshold value, the solution has the risk of icing, so that the system performs shutdown operation.
The shutdown control operation is executed on the open heat source tower heat pump system, so that the effect of preventing the solution from freezing is achieved, and the damage of the open heat source tower heat pump system caused by the freezing of the solution is further avoided.
In an alternative embodiment of the invention, referring to fig. 2, the step of determining the state of the solution in the open heat source tower heat pump system according to the first temperature difference is shown, and comprises:
If yes, that is, the first temperature difference is greater than the first temperature threshold, go to step 204; if not, that is, the first temperature difference is not greater than the first temperature threshold, step 205 is executed.
And 204, determining that the solution state in the open heat source tower heat pump system is a normal state, and returning to the step 201.
In the embodiment of the invention, the solution parameters of the solution in the heat pump system of the split heat source tower are as follows: temperature T of the solution2And a solution density value ρ. Calculating to obtain a freezing point value T corresponding to the solution density value rho by using a formula 11. According to the measured solution temperature T2And the calculated freezing point value T1And calculating a difference value to obtain a first temperature difference value, and judging the state of the solution in the open heat source tower heat pump system according to whether the first temperature difference value is greater than a first temperature threshold value. And when the first temperature difference value is not greater than the first temperature threshold value, judging that the solution has the risk of icing, and executing shutdown operation by the system. When the first temperature difference is larger than the first temperature threshold, the solution state is judged to be a normal state, and the system continues to execute the solution density value rho and the temperature T2Detecting and carrying out an ice point value T1And calculating a first temperature difference.
In one example, the first temperature threshold is 2 ℃, when the first temperature difference is not more than 2 ℃, the solution is judged to have the risk of icing, and the system performs shutdown operation. When the first temperature difference is larger than 2 ℃, the solution state is judged to be a normal state, and the system continues to execute the adjustment of the solution density value rho and the temperature T2Detecting and carrying out an ice point value T1And calculating a first temperature difference. The value of the first temperature threshold is only an example, and the limitation on the value of the first temperature threshold is not understood.
According to the invention, whether the solution has the risk of icing is determined by judging the state of the solution in the split heat source tower heat pump system, and the next operation is carried out according to the judgment result, so that the effects of preventing the solution from icing and damaging the system are achieved.
In an alternative embodiment of the invention, referring to fig. 3, the step of determining the solution state in the open heat source tower heat pump system according to the flow reduction rate is shown, and comprises:
In the embodiment of the invention, the flow information of the solution in the open heat source tower heat pump system is detected, and the flow reduction rate of the solution is determined according to the flow information of the detected solution.
The open heat source tower heat pump system includes a water pump, and referring to fig. 4, there is shown the steps of determining the rate of flow reduction of the solution based on the flow information, including,
And 403, periodically measuring a second flow value of the solution after the water pump operates for the first preset time.
If yes, namely the working frequency of the water pump meets the first frequency threshold, executing step 405 and 406; if not, that is, the operating frequency of the water pump does not meet the first frequency threshold, the step 402 is returned to.
In the embodiment of the invention, under the condition that the working frequency of the water pump is fixed, when the running time of the water pump reaches the first preset time, the first flow value Q of the solution is measured1Measuring a first flow rate value Q1Periodically measuring a second flow value Q of the solution2First flow value Q1The flow rate of the solution after the water pump operates for the first preset time can be regarded asThe initial flow rate of the solution; second flow value Q2Measuring the flow rate of the solution for the water pump to operate for a first preset time and then every third preset time, and sequentially obtaining a second flow rate value Q21Second flow value Q22Second flow value Q23Second flow value Q24… … are provided. Judging whether the working frequency of the water pump meets a first frequency threshold value in real time, if so, executing the next operation, and if not, needing to perform the first flow value Q1And detecting again, wherein the first frequency threshold is the working frequency of the initially set water pump.
In one example, the first predetermined time is 2min, the third predetermined time is 30s, and the first flow rate value Q is1The flow of the solution is 2min after the water pump operates; second flow value Q2Measuring the flow rate of the solution at intervals of 30s after the water pump operates for 2min, and sequentially obtaining a second flow rate value Q21Second flow value Q22Second flow value Q23Second flow value Q24… … are provided. The setting of the first preset time and the third preset time is only an example, and should not be construed as a limitation on the setting of the first preset time and the third preset time. The rate of flow reduction of the solution can be calculated by the following equation 3,
(Q1-Q2)÷Q2equation 3 ═ M
Wherein Q is1Is a first flow value, Q2For the second flow value, M is the rate of flow reduction of the solution.
If yes, that is, the flow rate reduction rate of the solution is greater than the flow rate reduction rate threshold, go to step 304; if not, that is, the flow rate reduction rate of the solution is not greater than the flow rate reduction rate threshold, step 305 is executed.
And step 304, determining that the solution state in the open heat source tower heat pump system is a freezing risk state.
And 305, determining that the solution state in the open heat source tower heat pump system is a normal state, and returning to 301.
In the embodiment of the present invention, the first and second substrates,and when the flow rate reduction rate of the solution is greater than the flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state, and executing shutdown operation by the open heat source tower heat pump system. When the flow rate reduction rate of the solution is not greater than the flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state, and continuously detecting a second flow value Q by the system2And the flow rate reduction rate is calculated. Because the solution forms less ice crystal particles, the ice crystal particles flow along with the solution, the flow velocity of the solution is reduced, the flow of the solution is further reduced, and when the flow reduction rate of the solution is greater than the flow reduction rate threshold value, the solution has the risk of icing, so that the system performs shutdown operation.
In one example, the flow rate reduction threshold is set to 20%, when the flow rate reduction threshold is greater than 20%, that is, the flow rate reduction rate of the solution reaches 20%, it is determined that the solution state in the open heat-source tower heat pump system is a freezing risk state, and the open heat-source tower heat pump system performs a shutdown operation. When the flow rate reduction rate threshold value is not more than 20%, determining that the solution state in the open heat source tower heat pump system is a normal state, and continuously detecting a second flow rate value Q by the system2And the flow rate reduction rate is calculated. The setting of the flow rate decrease rate threshold is merely an example, and should not be construed as limiting the flow rate decrease rate threshold.
In an alternative embodiment of the invention, referring to fig. 5, the open heat source tower heat pump system is further shown to include a fan and an ambient dry bulb, and the method further includes the steps of:
If so, that is, the second temperature difference is not greater than the second temperature threshold, execute step 505 and 508; if not, that is, the second temperature difference is greater than the second temperature threshold, step 509 is executed.
In step 505, the water pump performs a shutdown operation.
And step 506, judging whether the shutdown time of the water pump reaches a second preset time.
If so, namely the shutdown time of the water pump reaches the second preset time, executing the step 507; if not, that is, the shutdown time of the water pump does not reach the second preset time, step 508 is executed.
In step 507, the fan performs a shutdown operation.
And step 508, the fan operates normally.
In step 509, the water pump and the fan operate normally, and the process returns to step 501.
In the embodiment of the invention, the open heat source tower heat pump system comprises a water pump, a fan and an environment dry bulb, and the temperature T of the environment dry bulb is detected in real time3. After open heat source tower heat pump system execution shut down operation, except that the water pump and fan, other devices all stop operation, all transfer the operating frequency of water pump and fan to the biggest, make the flow grow of solution, and then carry out the volume of heat exchange air through fan and solution and also increase, finally make solution heat absorption intensification in the air rapidly, reduce the frozen risk of solution.
Temperature T of dry bulb according to environment3And temperature T of the solution2And determining a second temperature difference, performing the next operation on the system by judging whether the second temperature difference is not greater than a second temperature threshold, and determining that the solution icing risk is relieved and the water pump stops running when the second temperature difference is not greater than the second temperature threshold. When the second temperature difference is larger than the second temperature threshold value, determining that the solution still has the risk of icing, and continuously monitoring the ambient dry bulb temperature T3And solution temperature T2And a second temperature difference is calculated. When the open heat source tower heat pump system is stopped, the working frequencies of the water pump and the fan are adjusted to the maximum, the quantity of air subjected to heat exchange with the solution through the fan is increased, and the solution is reducedRisk of freezing of the liquid. And when the second temperature difference is not greater than the second temperature threshold, determining that the solution icing risk is relieved, and stopping the operation of the water pump. And after the running stop time of the water pump reaches a second preset time, stopping running of the fan, and overhauling the system. Such operation can effectively avoid freezing of the solution in the system during the maintenance process.
In one example, the second temperature threshold is set at 1 ℃. And when the second temperature difference is not more than 1 ℃, determining that the solution icing risk is relieved, and stopping the operation of the water pump. And after the running stop time of the water pump reaches a second preset time, stopping running of the fan, and overhauling the system, wherein the second preset time is 2 min. When the second temperature difference is larger than 1 ℃, determining that the solution still has the risk of icing, and continuously monitoring the environmental dry bulb temperature T3And solution temperature T2And a second temperature difference is calculated. The setting of the second temperature threshold and the second preset time is only an example, and the setting of the second temperature threshold and the second preset time is not limited.
Referring to fig. 6, the device for solution anti-freezing control method provided by the invention is shown, and is applied to an open heat source tower heat pump system, the device comprises,
the detecting module 601 is configured to detect solution parameters and flow information of a solution in the open heat source tower heat pump system, where the solution parameters include a solution temperature and a solution density value.
An analysis module 602 configured to determine an ice point value of the solution according to the solution density value, and determine a first temperature difference value according to the solution temperature and the ice point value; determining the flow rate reduction rate of the solution according to the flow information; and determining the state of the solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate.
And the control module 603 is configured to perform shutdown control operation on the open heat source tower heat pump system when the solution state is a freezing risk state.
In an alternative embodiment of the invention, the analysis module 602 includes,
the first judging unit is used for judging whether the first temperature difference value is larger than a first temperature threshold value or not; if the first temperature difference value is not larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state; and if the first temperature difference value is larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
In an alternative embodiment of the invention, the analysis module 602 further includes,
the second judgment unit is used for judging whether the flow rate reduction rate of the solution is greater than a flow rate reduction rate threshold value or not; when the flow rate reduction rate of the solution is larger than a flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state; and when the flow rate reduction rate of the solution is not greater than the flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
In an alternative embodiment of the invention, the open heat source tower heat pump system comprises a water pump, a fan and an environment dry bulb,
the detection module 601 is further configured to detect the temperature of the environmental dry bulb.
The device of the solution antifreezing control method also comprises,
and the frequency adjusting module 604 is used for adjusting the working frequency of the water pump and the fan to the maximum frequency after the shutdown control operation of the open heat source tower heat pump system is performed.
The control module 603, including,
and the control unit is used for executing a first control operation according to the difference value between the temperature of the environmental dry ball and the temperature of the solution.
In an alternative embodiment of the invention, the analysis module 602 further includes,
the third judgment unit is used for determining a second temperature difference value between the ambient dry bulb temperature and the temperature of the solution; performing shutdown operation on the water pump under the condition that the second temperature difference value is not greater than a second temperature threshold value; and when the water pump stop time reaches the second preset time, stopping the fan.
In an alternative embodiment of the invention, the traffic information includes a first traffic value and a second traffic value,
the detection module 601 includes, for example,
the first detection unit is used for measuring a first flow value of the solution when the running time of the water pump reaches a first preset time; and the water pump is also used for periodically measuring a second flow value of the solution after the water pump operates for a first preset time.
The analysis module 602, further comprising,
the fourth judging unit is used for determining the flow difference value of the first flow value and the second flow value; and determining the flow rate reduction rate of the solution according to the flow rate difference value and the first flow rate value.
In an alternative embodiment of the invention, the detecting module 601 further includes,
and the second detection module is used for detecting the first flow value again when the working frequency of the water pump changes.
As is readily imaginable to the person skilled in the art: any combination of the above embodiments is possible, and thus any combination between the above embodiments is an embodiment of the present invention, but the present disclosure is not necessarily detailed herein for reasons of space.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
An electronic device, comprising:
one or more processors;
a memory;
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the methods of the embodiments described above.
A computer-readable storage medium storing a computer program for use in conjunction with an electronic device, the computer program being executable by a processor to perform the method of the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method, the device, the electronic device and the storage device for controlling the anti-freezing of the solution provided by the invention are described in detail, and a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The anti-freezing control method for the solution is applied to an open heat source tower heat pump system, and comprises the following steps:
detecting solution parameters and flow information of a solution in an open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value;
determining a freezing point value of the solution according to the solution density value, and determining a first temperature difference value according to the solution temperature and the freezing point value;
determining the flow rate reduction rate of the solution according to the flow information;
determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate;
and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system.
2. The method of claim 1, wherein the step of determining a state of solution in the open heat source tower heat pump system based on the first temperature difference comprises:
judging whether the first temperature difference value is larger than a first temperature threshold value or not;
if the first temperature difference value is not larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state;
and if the first temperature difference value is larger than a first temperature threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
3. The method of claim 1, wherein the step of determining a solution state in the open heat source tower heat pump system as a function of the rate of flow reduction comprises:
judging whether the flow rate reduction rate of the solution is greater than a flow rate reduction rate threshold value or not;
when the flow rate reduction rate of the solution is larger than a flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a freezing risk state;
and when the flow rate reduction rate of the solution is not greater than the flow rate reduction rate threshold value, determining that the solution state in the open heat source tower heat pump system is a normal state.
4. The method of claim 1, wherein the open heat source tower heat pump system comprises a water pump, a fan, and an ambient dry bulb, the method further comprising:
detecting the temperature of the environmental dry bulb;
after the open heat source tower heat pump system is shut down and controlled, the working frequency of the water pump and the fan is adjusted to the maximum frequency;
and executing a first control operation according to the difference value between the temperature of the environmental dry ball and the temperature of the solution.
5. The method of claim 4, wherein the step of first controlling operation comprises,
determining a second temperature difference between the ambient dry bulb temperature and the temperature of the solution;
performing shutdown operation on the water pump under the condition that the second temperature difference value is not greater than a second temperature threshold value;
and when the water pump stop time reaches the second preset time, stopping the fan.
6. The method of claim 4, wherein the traffic information includes a first traffic value and a second traffic value,
detecting flow information of a solution in an open heat source tower heat pump system, including,
measuring a first flow value of the solution when the running time of the water pump reaches a first preset time;
periodically measuring a second flow value of the solution after the water pump operates for a first preset time;
determining a rate of flow reduction of the solution from the flow information, comprising:
determining a flow rate difference between the first flow rate value and the second flow rate value;
and determining the flow rate reduction rate of the solution according to the flow rate difference value and the first flow rate value.
7. The method of claim 6, further comprising re-detecting the first flow value when the operating frequency of the water pump changes.
8. The device of the solution anti-freezing control method is characterized by being applied to an open heat source tower heat pump system and comprising,
the detection module is used for detecting solution parameters and flow information of a solution in the open heat source tower heat pump system, wherein the solution parameters comprise a solution temperature and a solution density value.
The analysis module is used for determining an ice point value of the solution according to the solution density value and determining a first temperature difference value according to the solution temperature and the ice point value; determining the flow rate reduction rate of the solution according to the flow information; determining the state of a solution in the open heat source tower heat pump system according to the first temperature difference value and/or the flow reduction rate; and when the solution state is a freezing risk state, executing shutdown control operation on the open heat source tower heat pump system.
9. An electronic device, comprising:
one or more processors;
a memory;
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-7.
10. A computer-readable storage medium storing a computer program for use in conjunction with an electronic device, the computer program being executable by a processor to perform the method of any of claims 1-7.
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| CN202111344615.2A CN114118465A (en) | 2021-11-12 | 2021-11-12 | Anti-freezing control method and device for solution, electronic equipment and storage device |
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