CN117006563A

CN117006563A - Cold accumulation amount detection system and method, air conditioning system and control method thereof

Info

Publication number: CN117006563A
Application number: CN202311261180.4A
Authority: CN
Inventors: 李厚培; 罗伊默; 彭晋卿
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-11-07
Anticipated expiration: 2043-09-27
Also published as: CN117006563B

Abstract

The invention discloses a cold accumulation amount detection system, a cold accumulation amount detection method, an air conditioning system and a control method thereof, wherein the system comprises the following components: the detection device is arranged on the first surface and the second surface of the ice storage groove, a plurality of detection points which are uniformly distributed are arranged on the first surface and the second surface, a plurality of pairs of detection points are formed, the ice storage groove is divided into a plurality of grids, and the detection device is used for detecting detection data of each pair of detection points; a temperature measuring device; the main control device is used for determining the ice particle concentration corresponding to each grid according to the plurality of detection data and the corresponding relation between the ice particle concentration and the detection data; determining the total mass of ice and the total mass of water in the ice-water mixture according to the volume of the grids, the ice particle concentration, the ice density and the water density of each grid; and determining the cold accumulation amount according to the preset limit temperature, the temperature of the ice water mixture, the total mass of ice and the total mass of water. The cold accumulation amount detection system provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system for directly making ice by the refrigerating unit.

Description

Cold accumulation amount detection system and method, air conditioning system and control method thereof

Technical Field

The invention relates to the technical field related to air conditioners, in particular to a cold accumulation amount detection system and method, an air conditioning system and a control method thereof.

Background

At present, a method for reducing the running energy consumption of an air conditioner by using peak-to-valley electricity price difference exists in the industry. When electricity price is valley at night, preparing ice by a refrigerating unit and storing the ice in an ice storage tank; and when the electricity price is peak in the daytime, the cold energy stored in the ice storage tank is released to cool the building. Because of the extremely high peak-to-valley price difference (e.g., 1.4 to 0.3 yuan difference), this approach has the potential to greatly reduce the cost of construction operations. Meanwhile, construction of renewable energy sources such as solar photovoltaic and wind power generation is being greatly promoted in the industry. These renewable energy power generation sources are intermittent and periodic. For example, photovoltaic power generation is more in noon, less in the morning and evening, and not at night. But the refrigerating load of air conditioning of commercial buildings at night is high, and the residential buildings can only exist at night on weekdays, so the refrigerating load of the buildings is deviated from photovoltaic power generation. When the photovoltaic power generation is more, the transfer load can be regulated by making and storing ice, and the on-site utilization and on-site digestion proportion of renewable energy sources are increased.

There are many schemes for ice storage, one of which is commonly done by preparing 30-50% ice slurry (ice particles mixed with water) and then storing it in an ice storage tank. In the prior art, for a system that ice is made through a glycol loop and air conditioning is performed through chilled water, the cold accumulation amount of an ice accumulation groove can be known by monitoring the heat balance (obtained through flow and inlet-outlet temperature difference calculation) of the glycol loop and the chilled water loop, but the heat transfer process and the heat loss in cold accumulation cannot be detected, so that deviation exists. However, in a system in which ice is directly made by the refrigerant of the air conditioning unit, the cost rise and heat loss caused by the glycol loop can be reduced, but the cold accumulation amount cannot be obtained through heat balance (because the refrigerant is two phases and the heat exchange amount is difficult to calculate).

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a cold accumulation amount detection system which can accurately detect the cold accumulation amount of an air conditioning system for directly making ice by a refrigerating unit.

The invention also provides a cold accumulation amount detection method, an air conditioning system and a control method thereof, a main control device, a first computer readable storage medium and a second computer readable storage medium.

According to a first aspect of the present invention, a cold accumulation amount detection system is applied to an ice accumulation tank, wherein an ice water mixture is contained in the ice accumulation tank, and the cold accumulation amount detection system includes:

the detection device is arranged on the first surface and the second surface of the ice storage groove, a plurality of detection points which are uniformly distributed are arranged on the first surface and the second surface, the number of the detection points on the first surface and the number of the detection points on the second surface are the same, a plurality of pairs of detection points are formed, so that the ice storage groove is divided into a plurality of grids, the detection device is used for detecting detection data of each pair of detection points, the electrical characteristics of the detection data are influenced by dielectric constants, and different ice particle concentrations of the ice-water mixture have different dielectric constants;

a temperature measuring device for detecting a temperature of the ice-water mixture;

the main control device is respectively and electrically connected with the detection device and the temperature measurement device, and is used for acquiring a plurality of detection data detected by the detection device, the temperature of the ice water mixture detected by the temperature measurement device, the volume of the ice storage tank and the number of grids; determining the ice particle concentration corresponding to each grid according to a plurality of detection data and a corresponding relation between a preset ice particle concentration and the detection data, wherein the corresponding relation is obtained through a tomography anti-calculation method; determining the total mass of ice and the total mass of water in an ice-water mixture in the ice storage tank according to the volumes of the grids, the ice particle concentration, the ice density and the water density corresponding to each grid, wherein the volumes of the grids are obtained according to the volumes of the ice storage tanks and the number of the grids; and determining the cold accumulation amount according to a preset limit temperature, the temperature of the ice-water mixture, the total mass of ice in the ice-water mixture and the total mass of water, wherein the preset limit temperature represents the system water inlet temperature of chilled water.

The cold accumulation amount detection system provided by the embodiment of the invention has at least the following beneficial effects:

the ice water in the ice storage tank is not uniform due to the arrangement problem of the ice outlet and the injection port of the ice storage tank. The negative pressure of the ice outlet at the bottom of the ice storage tank and the ground heat bridge lead to lower concentration of ice particles in the ice-water mixture at the bottom, and the newly prepared ice slurry is ejected from the ejection opening at the top, so that the ice particles are easier to accumulate below the ejection opening. By arranging a plurality of detection points which are uniformly distributed and have the same number on any two surfaces of the ice storage groove, a plurality of pairs of detection points can be formed, so that the ice storage groove can be divided into a plurality of grids, and each grid corresponds to one pair of detection points. The electrical characteristics of the detection data are affected by the dielectric constants, different ice particle concentrations of the ice-water mixture have different dielectric constants, and the dielectric constant change of each grid can be judged by detecting the detection data corresponding to each grid, so that the ice particle concentration change of different grids can be judged. The corresponding relation between the ice particle concentration and the detection data can be obtained in advance through a tomography anti-calculation method, so that the ice particle concentration corresponding to each grid can be determined through the detected detection data, the total mass of ice and the total mass of water in an ice-water mixture can be accurately calculated, and the cold accumulation amount of the ice storage groove can be determined. The cold accumulation amount detection system provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system for directly making ice by the refrigerating unit.

According to some embodiments of the invention, the detection device comprises:

the first electrodes are uniformly arranged on the first surface;

the plurality of second electrodes are uniformly arranged on the second surface, the number of the first electrodes is the same as that of the second electrodes, one pair of electrodes is formed by the first electrodes and the second electrodes, so that the ice storage groove is divided into a plurality of grids, and each pair of electrodes is used for detecting detection data corresponding to the grids.

A cold accumulation amount detection method according to an embodiment of a second aspect of the present invention, applied to the master control device according to the embodiment of the first aspect, includes the steps of:

acquiring a plurality of the detection data detected by the detection device, the temperature of the ice-water mixture detected by the temperature measurement device, the volume of the ice storage tank, and the number of the grids;

determining the ice particle concentration corresponding to each grid according to a plurality of detection data and a corresponding relation between a preset ice particle concentration and the detection data, wherein the corresponding relation is obtained through a tomography anti-calculation method;

determining the total mass of ice and the total mass of water in an ice-water mixture in the ice storage tank according to the volumes of the grids, the ice particle concentration, the ice density and the water density corresponding to each grid, wherein the volumes of the grids are obtained according to the volumes of the ice storage tanks and the number of the grids;

And determining the cold accumulation amount according to a preset limit temperature, the temperature of the ice-water mixture, the total mass of ice in the ice-water mixture and the total mass of water, wherein the preset limit temperature represents the system water inlet temperature of chilled water.

The cold accumulation amount detection method provided by the embodiment of the invention has at least the following beneficial effects:

the ice water in the ice storage tank is not uniform due to the arrangement problem of the ice outlet and the injection port of the ice storage tank. The negative pressure of the ice outlet at the bottom of the ice storage tank and the ground heat bridge lead to lower concentration of ice particles in the ice-water mixture at the bottom, and the newly prepared ice slurry is ejected from the ejection opening at the top, so that the ice particles are easier to accumulate below the ejection opening. By arranging a plurality of detection points which are uniformly distributed and have the same number on any two surfaces of the ice storage groove, a plurality of pairs of detection points can be formed, so that the ice storage groove can be divided into a plurality of grids, and each grid corresponds to one pair of detection points. The electrical characteristics of the detection data are affected by the dielectric constants, different ice particle concentrations of the ice-water mixture have different dielectric constants, and the dielectric constant change of each grid can be judged by detecting the detection data corresponding to each grid, so that the ice particle concentration change of different grids can be judged. The corresponding relation between the ice particle concentration and the detection data can be obtained in advance through a tomography anti-calculation method, so that the ice particle concentration corresponding to each grid can be determined through the detected detection data, the total mass of ice and the total mass of water in an ice-water mixture can be accurately calculated, and the cold accumulation amount of the ice storage groove can be determined. The cold accumulation amount detection method provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system for directly making ice by the refrigerating unit.

According to some embodiments of the invention, the correspondence is obtained by:

defining a range of ice particle concentration to be equal to or greater than 0 and equal to or less than 1, or equal to-1, wherein ice particle concentration of 0 represents pure water, ice particle concentration of 1 represents pure ice, and ice particle concentration of-1 represents air;

based on the ice particle concentration range, simulation software is utilized to simulate the simulation working conditions divided into a plurality of grids and the ice particle concentrations corresponding to different grids, and simulation electrical data corresponding to simulation concentration data are obtained;

and establishing the corresponding relation according to the simulation concentration data and the simulation electrical data corresponding to different grids through machine learning.

According to some embodiments of the invention, the establishing the correspondence according to the simulation concentration data and the simulation electrical data corresponding to different grids through machine learning includes the following steps:

defining a concentration range of the water mixture of the known dielectric constant substances to be more than or equal to 0 and less than or equal to 1, or equal to-1, wherein the concentration of 0 represents pure water, the concentration of 1 represents pure known dielectric constant substances, and the concentration of-1 represents air;

Based on the concentration range of the water mixture of the known dielectric constant substances, simulation software is utilized to simulate the simulation working conditions divided into a plurality of grids and the concentrations of the water mixture of the known dielectric constant substances corresponding to different grids, so as to obtain corresponding corrected electrical data;

acquiring measured electrical data of water mixtures of the known dielectric constant substances corresponding to different grids detected under the same actual working condition as the simulation working condition;

fitting and calibrating according to the corrected electrical data and the measured electrical data corresponding to different grids to obtain concentration deviation data;

correcting the simulation concentration data through the concentration deviation data to obtain corrected concentration data;

and establishing the corresponding relation according to the corrected concentration data and the simulated electrical data corresponding to different grids through machine learning.

According to some embodiments of the invention, the constraint formula of the total mass of ice in the ice-water mixture in the ice storage tank is:

；

wherein,as a total mass of the ice,Wice particle concentration, +.>For the temperature of the ice-water mixture, +.>Is->Density of ice falling->For the volume of each of the grids.

According to some embodiments of the invention, the constraint formula of the total mass of water in the ice-water mixture in the ice-storage tank is:

；

wherein,is the total mass of the water, which is the total mass of the water,Wice particle concentration, +.>For the temperature of the ice-water mixture, +.>Is->Density of sewage, don't care>For the volume of each of the grids.

According to an embodiment of the third aspect of the present invention, an air conditioning system includes an air conditioner body, an ice storage tank provided in the air conditioner body, a refrigerating unit and a chilled water unit, wherein the refrigerating unit is used for preparing an ice-water mixture and inputting the ice-water mixture into the ice storage tank, a period of preparing the ice-water mixture is a cold accumulation period, the chilled water unit is connected with the ice storage tank, a period of inputting the ice-water mixture in the ice storage tank into the chilled water unit for preparing chilled water is a cold release period, and the air conditioning system further includes:

the cold accumulation amount detection system according to the embodiment of the first aspect is disposed on the ice accumulation groove, and is used for detecting cold accumulation amount;

and the control device is electrically connected with the refrigerating unit and the chilled water unit.

The air conditioning system adopts all the technical schemes of the cold accumulation amount detection system of the embodiment, so that the air conditioning system has at least all the beneficial effects brought by the technical schemes of the embodiment.

A control method of an air conditioning system according to a fourth aspect of the present invention is applied to the air conditioning system according to the above-described third aspect, and includes the steps of:

acquiring the cold load of each time point in the cold release period, the current indoor and outdoor environment, the first refrigeration coefficient under load, the second refrigeration coefficient in the cold accumulation period, the electricity price in the cold release period and the cold accumulation amount;

calculating corresponding cold accumulation and release parameters when the total running cost is lowest according to the cold load, the first refrigeration coefficient, the second refrigeration coefficient, the cold accumulation period electricity price, the cold release period electricity price and the cold accumulation amount at each time point in the cold release period, wherein the cold accumulation and release parameters comprise a cold accumulation decision parameter and a cold release decision parameter;

and controlling the action of the refrigerating unit and the chilled water unit based on the cold accumulation and release parameters, wherein the cold accumulation and release parameters control the refrigerating unit to prepare an ice water mixture and input the ice water mixture into the ice storage tank when the cold accumulation and release parameters are cold accumulation decision parameters, and the chilled water unit is controlled to prepare chilled water through the ice water mixture in the ice storage tank when the cold accumulation and release parameters are cold release decision parameters.

The control method of the air conditioning system has at least the following beneficial effects:

the control method of the air conditioning system adopts all the technical schemes of the air conditioning system of the embodiment, so that the control method at least has all the beneficial effects brought by the technical schemes of the embodiment. Under the condition that the cold accumulation amount of an air conditioning system capable of directly making ice through a refrigerating unit can be accurately detected, on the premise that a cold accumulation period is a low electricity price valley period (night) and a cold release period is a peak period (daytime) with a high electricity price, the refrigerating unit and a chilled water unit are controlled to act based on the cold accumulation and cold release parameters by calculating the corresponding cold accumulation and cold release parameters when the total running cost is the lowest, and the refrigerating unit is controlled to prepare an ice-water mixture and input into an ice storage tank when the cold accumulation and cold release parameters are cold accumulation decision parameters; when the cold accumulation and release parameters are the cold release decision parameters, the chilled water unit is controlled to prepare chilled water through the ice water mixture in the ice accumulation groove, and the optimal control of the air conditioning system is carried out by monitoring the cold accumulation amount in real time, so that the running cost is reduced.

A control method of an air conditioning system according to an embodiment of a fifth aspect of the present invention is applied to the air conditioning system according to the embodiment of the third aspect described above, and includes the steps of:

Acquiring the cold load of each time point in the cold release period, the current indoor and outdoor environment, the first refrigeration coefficient under load, the second refrigeration coefficient in the cold storage period, the power grid carbon emission factor, the photovoltaic carbon emission factor and the cold storage quantity;

according to the cold load, the first refrigeration coefficient, the second refrigeration coefficient, the power grid carbon emission factor, the photovoltaic carbon emission factor and the cold accumulation amount at each time point in the cold release period, calculating corresponding cold accumulation and cold release parameters when the total running carbon emission is the lowest, wherein the cold accumulation and cold release parameters comprise cold accumulation decision parameters and cold release decision parameters;

the control method of the air conditioning system adopts all the technical schemes of the air conditioning system of the embodiment, so that the control method at least has all the beneficial effects brought by the technical schemes of the embodiment. Under the condition that the cold accumulation amount of an air conditioning system capable of directly making ice through a refrigerating unit can be accurately detected, on the premise that a cold accumulation period is a period with high renewable energy power generation (in the case of photovoltaics, daytime), a cold release period is a period with insufficient or missing renewable energy power generation (night of resident buildings, night of commercial buildings and the like), corresponding cold accumulation and release parameters are calculated when the total running cost is the lowest, then the actions of the refrigerating unit and the chilled water unit are controlled based on the cold accumulation and release parameters, and when the cold accumulation and release parameters are cold accumulation decision parameters, the refrigerating unit is controlled to prepare an ice-water mixture and input the ice accumulation mixture into an ice accumulation tank; when the cold accumulation and release parameters are the cold release decision parameters, the chilled water unit is controlled to prepare chilled water through the ice water mixture in the ice accumulation groove, and the optimal control of the air conditioning system is carried out by monitoring the cold accumulation amount in real time, so that the running cost is reduced.

A master control apparatus according to an embodiment of a sixth aspect of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed implements the cold accumulation amount detection method as described in the embodiment of the second aspect described above. The main control device adopts all the technical schemes of the cold accumulation amount detection method of the embodiment, so that the method has at least all the beneficial effects brought by the technical schemes of the embodiment.

A control device according to an embodiment of a seventh aspect of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed implements the control method of the air conditioning system according to the above-described fourth and fifth embodiments. The control device adopts all the technical schemes of the control method of the air conditioning system in the embodiment, so that the control device has at least all the beneficial effects brought by the technical schemes in the embodiment.

According to a first computer-readable storage medium of an embodiment of an eighth aspect of the present invention, computer-executable instructions for performing the cold accumulation amount detection method according to the embodiment of the second aspect described above are stored. Since the first computer-readable storage medium adopts all the technical solutions of the cold accumulation amount detection method of the above embodiment, it has at least all the advantageous effects brought by the technical solutions of the above embodiment.

According to a second computer-readable storage medium of the ninth aspect embodiment of the present invention, computer-executable instructions for performing the control method of the air conditioning system according to the fourth and fifth aspect embodiments are stored. Since the second computer readable storage medium adopts all the technical solutions of the control method of the air conditioning system of the above embodiment, it has at least all the advantageous effects brought by the technical solutions of the above embodiment.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a partial block diagram of a prior art air conditioning system employing a glycol loop for ice making;

FIG. 2 is a partial system block diagram of an air conditioning system for making ice directly by a refrigeration unit according to one embodiment of the present invention;

FIG. 3 is a schematic view showing a structure of an ice bank according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing an arrangement of a detecting device according to an embodiment of the present invention;

Fig. 5 is a flowchart of a cold accumulation amount detection method according to an embodiment of the invention;

FIG. 6 is a schematic view of a cold accumulation period and a cold release period according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a refrigeration capacity control according to an embodiment of the present invention;

FIG. 8 is a schematic view of cold accumulation control according to an embodiment of the invention;

fig. 9 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;

fig. 10 is a flowchart of a control method of an air conditioning system according to another embodiment of the present invention.

Reference numerals:

an ice storage tank 100, an injection port 101, and an ice outlet 102;

a first electrode 210, a second electrode 220;

a refrigeration unit 300;

a glycol circuit 400;

chilled water unit 500.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific content of the technical solution.

In order to better explain the advantages of the cold accumulation amount detection system according to the embodiment of the present invention, a simple description will be made on an air conditioning system to which the present invention is applied.

Fig. 1 is a partial block diagram of an air conditioning system for making ice using a glycol circuit 400 according to the prior art, and fig. 2 is a partial block diagram of an air conditioning system for making ice directly using a refrigerating unit 300 according to an embodiment of the present invention, in which the air conditioning system for making ice using the glycol circuit 400 and performing air conditioning using chilled water can be known by monitoring the heat balance (calculated by flow and inlet/outlet temperature differences) between the glycol circuit 400 and the chilled water circuit, but the heat transfer process and the heat loss in the cold storage can not be known, and thus there is a deviation. However, in an air conditioning system in which ice is directly made by the refrigerant of the air conditioning unit (i.e., the refrigerating unit 300 in the embodiment of the present invention), the cost increase and heat loss caused by the glycol circuit 400 can be reduced, but the amount of cold accumulation cannot be obtained by heat balance (because the refrigerant is two phases, and the heat exchange amount is difficult to measure).

Based on this, the embodiment of the invention provides a cold accumulation amount detection system applied to an air conditioning system directly making ice by a refrigerating unit 300, which can accurately detect the cold accumulation amount of the air conditioning system directly making ice by the refrigerating unit 300.

The cold accumulation amount detection system according to the embodiment of the present invention will be clearly and completely described with reference to fig. 1 to 5, and it is apparent that the embodiments described below are some, but not all, embodiments of the present invention.

The cold accumulation amount detection system according to the embodiment of the first aspect of the invention is applied to the ice accumulation tank 100, the ice accumulation tank 100 is filled with an ice water mixture, and the cold accumulation amount detection system comprises a detection device, a temperature measurement device and a main control device.

The detection device is arranged on the first surface and the second surface of the ice storage tank 100, a plurality of detection points which are uniformly distributed are arranged on the first surface and the second surface, the number of the detection points on the first surface is the same as that of the detection points on the second surface, a plurality of pairs of detection points are formed, the ice storage tank 100 is divided into a plurality of grids, the detection device is used for detecting detection data of each pair of detection points, the electrical characteristics of the detection data are influenced by dielectric constants, and different ice particle concentrations of an ice-water mixture have different dielectric constants;

A temperature measuring device for detecting the temperature of the ice-water mixture;

the main control device is respectively and electrically connected with the detection device and the temperature measurement device and is used for acquiring a plurality of detection data detected by the detection device, the temperature of the ice-water mixture detected by the temperature measurement device, the volume of the ice storage tank 100 and the number of grids; determining the ice particle concentration corresponding to each grid according to a plurality of detection data and a corresponding relation between the predetermined ice particle concentration and the detection data, wherein the corresponding relation is obtained through a tomography back calculation method; determining the total mass of ice and the total mass of water in the ice-water mixture in the ice storage tank 100 according to the volumes of the grids, the ice particle concentration, the ice density and the water density corresponding to each grid, wherein the volumes of the grids are obtained according to the volumes of the ice storage tanks 100 and the number of the grids; and determining the cold accumulation amount according to a preset limit temperature, the temperature of the ice-water mixture, the total mass of ice in the ice-water mixture and the total mass of water, wherein the preset limit temperature represents the system water inlet temperature of the chilled water.

Referring to fig. 3, fig. 3 is an ice bank 100 stored in a thermal insulation case by spraying ice slurry. The ice slurry prepared by the ice slurry preparation unit is sprayed into the ice storage tank 100 through the spray opening 101, is pumped out through the ice outlet 102 when in use, exchanges heat with chilled water through a surface heat exchanger, and then conveys cold energy to the tail end of a building through the chilled water. Due to the arrangement problem of the ice outlet 102 and the injection port 101, the ice water in the ice storage tank 100 is not uniform, the negative pressure of the ice outlet 102 at the bottom of the ice storage tank 100 and the ground thermal bridge lead to lower concentration of ice particles in the ice-water mixture at the bottom, and the ice particles are easier to accumulate below the injection port 101 at the top due to the newly prepared ice slurry injected from the injection port 101. Thus, a comprehensive evaluation of the distribution of the ice-water mixture within the ice bank 100 is required.

In some embodiments of the present invention, referring to fig. 4, the detection device includes a plurality of first electrodes 210 and a plurality of second electrodes 220. A plurality of first electrodes 210 uniformly disposed on the first surface; the plurality of second electrodes 220 are uniformly disposed on the second surface, the number of the first electrodes 210 and the number of the second electrodes 220 are the same, and one first electrode 210 and one second electrode 220 form a pair of electrodes to divide the ice bank 100 into a plurality of grids, each pair of electrodes being used to detect detection data of a corresponding grid.

The first surface and the second surface are any two surfaces of the ice storage groove 100, which may be adjacent two side surfaces, opposite two side surfaces, or one side surface and one bottom surface, which can achieve the technical effects of the present invention, and are not to be construed as limiting the present invention.

The electrical characteristics of the detection data are affected by the dielectric constant, and can be capacitance data or resistance data, which can achieve the technical effects of the present invention, and are not to be construed as limiting the present invention. The detection principle of the detection device is known to those skilled in the art, and will not be described herein.

The dielectric constant of water is about 70, and the dielectric constant of ice is 3-5. Thus, the difference in the ice content of the ice-water mixture will result in a difference in its dielectric constant. And the distribution and the size of the ice particles and other parameters can influence the potential distribution of the ice particles, so that the measured capacitance data or resistance data are different, and a theoretical basis is laid for measuring the total mass of the water and the total mass of the ice.

In some embodiments, referring to fig. 4, the first electrodes 210 and the second electrodes 220 are 16, and are arranged in 4 rows and 4 columns, and the two sides of the first electrodes and the second electrodes are 16 electrodes, so that 256 pairs are formed in total, and after alternating voltages are applied to the 256 pairs of electrodes, capacitance data or resistance data can be measured, that is, 256 capacitance data or resistance data are obtained. The 16 electrodes on both sides may divide the ice bank 100 into 64 grids, the number of which is determined by the number of the first electrodes 210 and the second electrodes 220. It should be noted that, since two detection data can be obtained by a pair of electrodes, the detection data and the number of grids do not correspond to each other one by one, and the principle is the prior art known to those skilled in the art, and no detailed description is given here.

The number and distribution of the first electrode 210 and the second electrode 220 may be changed according to actual needs, and the number of divisions of the corresponding grids is not limited to the present invention.

The ice particle concentration of each grid may be defined asW，Definition of Ice particle concentrationWIn the range of 0 or more and 1 or less, or-1, wherein,Wa value of 0 represents pure water,Wa value of 1 represents pure ice and,W-1 represents air; based on the ice particle concentration range, simulation software (general partial differential finite element simulation software or professional software such as comsol) is utilized to simulate the simulation working conditions divided into a plurality of grids and the ice particle concentrations corresponding to different grids, so as to obtain simulation electrical data corresponding to simulation concentration data.

By preparing the same actual measurement sample as the ice bank 100 in the embodiment of the present invention, the ice-water mixture is changed into a water mixture of a substance with a known dielectric constant (which may be a substance with a known dielectric constant such as a resin, which is easier to obtain and fill or place), and the concentration range of the water mixture of the substance with a known dielectric constant is defined to be equal to or greater than 0 and equal to or less than 1, or equal to-1, wherein the concentration is 0 represents pure water, the concentration is 1 represents a pure substance with a known dielectric constant, and the concentration is-1 represents air; based on the concentration range of the water mixture of the known dielectric constant substances, simulation software is utilized to simulate the simulation working conditions divided into a plurality of grids and the concentration of the water mixture of the known dielectric constant substances corresponding to different grids, so as to obtain corresponding corrected electrical data; obtaining measured electrical data of water mixtures of substances with known dielectric constants corresponding to different grids detected under the same actual working condition as the simulation working condition; fitting and calibrating according to the corrected electrical data and the actually measured electrical data corresponding to different grids to obtain concentration deviation data; and correcting the simulation concentration data through the concentration deviation data to obtain corrected concentration data. By measuring the simulation data and the actual data of the known dielectric constant substances under the same experimental conditions to determine the concentration deviation data, the simulation concentration data of the ice-water mixture can be corrected, the accuracy of the simulation concentration data is improved, and therefore more accurate cold accumulation can be obtained.

Through machine learning, the corresponding relation between the ice particle concentration and the detection data can be established according to the corrected concentration data and the simulated electricity data corresponding to different grids. It should be noted that machine learning is known in the art, and specific principles and processes thereof will not be described herein.

The distribution of the concentration of ice particles determines the volume of ice slurry of the ice-water mixture in the ice bank 100 and the concentration of ice particles in the ice slurry. Obviously, whenW0 or more means that there is ice slurry in the grid, whenWEqual to-1，Meaning that the mesh is air. Second, whenWWhen 0 or more and 1 or lessWIs the concentration of ice in the ice slurry (i.e., the ice particle concentration).

The constraint formula of the total mass of ice in the ice-water mixture in the ice bank 100 is:

；

wherein,as a total mass of the ice,Wice particle concentration, +.>For the temperature of the ice-water mixture, < >>Is->Density of ice falling->For the volume of each grid.

The constraint formula of the total mass of water in the ice water mixture in the ice bank 100 is:

；

wherein,is the total mass of the water, which is the total mass of the water,Wice particle concentration, +.>For the temperature of the ice-water mixture, < >>Is->Density of sewage, don't care>For the volume of each grid.

The amount of cold accumulation in the ice bank 100 is calculated, and it is necessary to know how much water, how much ice, and the states of ice and water are in the ice bank 100.

Cold accumulation amountThe constraint formula of (2) is:

；

wherein,for the total mass of water, < > water->For the total mass of ice>Specific enthalpy of water->Specific enthalpy of ice->Is the specific enthalpy of water at a preset limit temperature.

Can be directly obtained by evaluating standard atmospheric pressure, preset limit temperature (++>) The specific enthalpy of the water below is obtained. The preset limit temperature is the temperature after all ice in the ice storage tank 100 melts and the temperature of water reaches the heat exchange limit, and is generally the system water inlet temperature of chilled water, for example, the preset limit temperature is 7 ℃ for the traditional chilled water design of 7-12 ℃ water, but the temperature is not limited to the temperatureAnd not to be construed as limiting the invention, the particular predetermined threshold temperature is determined in response to actual conditions.

And->By measuring the temperature of the ice-water mixture->Water and ice were evaluated at standard atmospheric pressure and measured temperature (+.>) Obtained. In most cases, & gt>Is 0 degrees celsius.

According to the cold accumulation amount detection system of the embodiment of the invention, the ice water in the ice accumulation groove 100 is not uniform due to the arrangement problem of the ice outlet 102 and the injection port 101 of the ice accumulation groove 100. The negative pressure of the ice outlet 102 at the bottom of the ice storage tank 100 and the ground heat bridge result in a lower concentration of ice particles in the ice-water mixture at the bottom, while ice particles are more likely to accumulate below the injection port 101 at the top due to the newly prepared ice slurry injected from the injection port 101. By arranging a plurality of detection points uniformly distributed and equal in number on any two surfaces of the ice bank 100, a plurality of pairs of detection points can be formed, so that the ice bank 100 can be divided into a plurality of grids, each corresponding to a pair of detection points. The electrical characteristics of the detection data are affected by the dielectric constants, different ice particle concentrations of the ice-water mixture have different dielectric constants, and the dielectric constant change of each grid can be judged by detecting the detection data corresponding to each grid, so that the ice particle concentration change of different grids can be judged. The correspondence between the ice particle concentration and the detection data can be obtained in advance by the inverse tomography calculation method, so that the ice particle concentration corresponding to each grid can be determined by the detected detection data, and the total mass of ice and the total mass of water in the ice-water mixture can be accurately calculated to determine the cold accumulation amount of the ice storage tank 100. The cold accumulation amount detection system provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system directly making ice through the refrigerating unit 300.

According to a second aspect of the present invention, a cold accumulation amount detection method is applied to the master control device according to the first aspect, and includes the steps of:

acquiring a plurality of detection data detected by the detection means, a temperature of the ice-water mixture detected by the temperature measurement means, a volume of the ice bank 100, and the number of meshes;

determining the ice particle concentration corresponding to each grid according to a plurality of detection data and a corresponding relation between the predetermined ice particle concentration and the detection data, wherein the corresponding relation is obtained through a tomography back calculation method;

determining the total mass of ice and the total mass of water in the ice-water mixture in the ice storage tank 100 according to the volumes of the grids, the ice particle concentration, the ice density and the water density corresponding to each grid, wherein the volumes of the grids are obtained according to the volumes of the ice storage tanks 100 and the number of the grids;

and determining the cold accumulation amount according to a preset limit temperature, the temperature of the ice-water mixture, the total mass of ice in the ice-water mixture and the total mass of water, wherein the preset limit temperature represents the system water inlet temperature of the chilled water.

After the corresponding relation between the ice particle concentration and the detection data is obtained through simulation, the detection device can obtain the corresponding ice particle concentration according to the corresponding relation when detecting the detection data, so that the ice particle concentrations corresponding to different grids in the whole ice storage tank 100 are obtained, the total mass of water in an ice water mixture in the ice storage tank 100 and the total mass of ice are accurately calculated, and the cold accumulation amount can be accurately calculated.

；

Cold accumulation amountThe constraint formula of (2) is:

；

Can be directly obtained by evaluating standard atmospheric pressure, preset limit temperature (++>) The specific enthalpy of the water below is obtained. The preset limit temperature is the temperature after all ice in the ice storage tank 100 melts and the temperature of water reaches the heat exchange limit, and is generally the system water inlet temperature of chilled water, for example, the preset limit temperature is 7 ℃ for the traditional chilled water design of 7-12 ℃ water, but the preset limit temperature is not considered as the limit of the invention and is specifically required according to the invention And determining the actual situation.

After the total mass of the water and the total mass of the ice are calculated, the accurate cold accumulation amount can be determined according to the preset limit temperature, the temperature of the ice-water mixture, the total mass of the ice in the ice-water mixture and the total mass of the water.

According to the cold accumulation amount detection method of the embodiment of the invention, the ice water in the ice accumulation groove 100 is not uniform due to the arrangement problem of the ice outlet 102 and the injection port 101 of the ice accumulation groove 100. The negative pressure of the ice outlet 102 at the bottom of the ice storage tank 100 and the ground heat bridge result in a lower concentration of ice particles in the ice-water mixture at the bottom, while ice particles are more likely to accumulate below the injection port 101 at the top due to the newly prepared ice slurry injected from the injection port 101. By arranging a plurality of detection points uniformly distributed and equal in number on any two surfaces of the ice bank 100, a plurality of pairs of detection points can be formed, so that the ice bank 100 can be divided into a plurality of grids, each corresponding to a pair of detection points. The electrical characteristics of the detection data are affected by the dielectric constants, different ice particle concentrations of the ice-water mixture have different dielectric constants, and the dielectric constant change of each grid can be judged by detecting the detection data corresponding to each grid, so that the ice particle concentration change of different grids can be judged. The correspondence between the ice particle concentration and the detection data can be obtained in advance by the inverse tomography calculation method, so that the ice particle concentration corresponding to each grid can be determined by the detected detection data, and the total mass of ice and the total mass of water in the ice-water mixture can be accurately calculated to determine the cold accumulation amount of the ice storage tank 100. The cold accumulation amount detection method provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system directly making ice through the refrigerating unit 300.

In some embodiments of the present invention, the correspondence is obtained by:

based on the range of the ice particle concentration, simulation software is utilized to simulate the simulation working conditions divided into a plurality of grids and the ice particle concentration corresponding to different grids, and simulation electrical data corresponding to simulation concentration data are obtained;

through machine learning, a corresponding relation is established according to simulation concentration data and simulation electricity data corresponding to different grids.

In some embodiments of the present invention, a correspondence is established according to simulation concentration data and simulation electrical data corresponding to different grids through machine learning, including the following steps:

based on the concentration range of the water mixture of the known dielectric constant substances, simulation software is utilized to simulate the simulation working conditions divided into a plurality of grids and the concentration of the water mixture of the known dielectric constant substances corresponding to different grids, so as to obtain corresponding corrected electrical data;

obtaining measured electrical data of water mixtures of substances with known dielectric constants corresponding to different grids detected under the same actual working condition as the simulation working condition;

fitting and calibrating according to the corrected electrical data and the actually measured electrical data corresponding to different grids to obtain concentration deviation data;

and through machine learning, a corresponding relation is established according to the corrected concentration data and the simulated electricity data corresponding to different grids.

By measuring the simulation data and the actual data of the known dielectric constant substances under the same experimental conditions to determine the concentration deviation data, the simulation concentration data of the ice-water mixture can be corrected, the accuracy of the simulation concentration data is improved, and therefore more accurate cold accumulation can be obtained.

An air conditioning system according to an embodiment of the present invention will be clearly and fully described with reference to fig. 1 to 5, and it is apparent that the embodiments described below are some, but not all, embodiments of the present invention.

An air conditioning system according to an embodiment of the third aspect of the present invention includes an air conditioner body, an ice storage tank 100 provided in the air conditioner body, a refrigerating unit 300, and a chilled water unit 500, the refrigerating unit 300 being used to prepare an ice water mixture and input into the ice storage tank 100, a period of preparing the ice water mixture being a cold storage period, the chilled water unit 500 being connected to the ice storage tank 100, a period of inputting the ice water mixture in the ice storage tank 100 into the chilled water unit 500 to prepare chilled water being a cold release period, and the air conditioning system further includes the cold storage amount detecting system and the control device according to the embodiment of the first aspect as described above. The cold accumulation amount detection system according to the embodiment of the first aspect is disposed on the ice accumulation tank 100, and is used for detecting the cold accumulation amount; and the control device is electrically connected with the refrigerating unit 300 and the chilled water unit 500.

Fig. 1 is a partial system block diagram of an air conditioning system for ice making using a glycol circuit 400 according to the prior art, and fig. 2 is a partial system block diagram of an air conditioning system for ice making directly by a refrigerating unit 300 according to an embodiment of the present invention, that is, an air conditioning system according to a third aspect of the present invention.

For an air conditioning system that makes ice through the glycol circuit 400 and performs air conditioning through chilled water, the amount of cold accumulation in the ice bank 100 can be known by monitoring the heat balance (calculated by flow and inlet-outlet temperature difference) of the glycol circuit 400 and the chilled water circuit, but the heat transfer process and heat loss in cold accumulation cannot be ascertained, and thus there is a deviation. However, in an air conditioning system in which ice is directly made by the refrigerant of the air conditioning unit (i.e., the refrigerating unit 300 in the embodiment of the present invention), the cost increase and heat loss caused by the glycol circuit 400 can be reduced, but the amount of cold accumulation cannot be obtained by heat balance (because the refrigerant is two phases, and the heat exchange amount is difficult to measure).

The cold accumulation amount detection system provided by the embodiment of the invention can accurately detect the cold accumulation amount of the air conditioning system directly making ice through the refrigerating unit 300.

The control method of the air conditioning system according to the embodiment of the present invention will be clearly and completely described with reference to fig. 6 to 10, and it is apparent that the embodiments described below are some, but not all, embodiments of the present invention.

The control method of the air conditioning system according to the fourth aspect of the present invention is applied to the air conditioning system according to the third aspect, and includes the steps of:

according to the cold load, the first refrigeration coefficient, the second refrigeration coefficient, the electricity price in the cold storage period and the cold storage quantity of each time point in the cold storage period, calculating corresponding cold storage and cold release parameters when the total running cost is lowest, wherein the cold storage and cold release parameters comprise cold storage decision parameters and cold release decision parameters;

the refrigeration unit 300 and the chilled water unit 500 are controlled to act based on cold accumulation and cold release parameters, wherein when the cold accumulation and cold release parameters are cold accumulation decision parameters, the refrigeration unit 300 is controlled to prepare an ice water mixture and input the ice water mixture into the ice storage tank 100, and when the cold accumulation and cold release parameters are cold release decision parameters, the chilled water unit 500 is controlled to prepare chilled water through the ice water mixture in the ice storage tank 100.

The operation cycle of the ice-storage type air conditioning unit can be divided into two parts: a cold accumulation period (cold accumulation period) and a cold release period (cold release period). The cold accumulation period can be a valley period (night) with lower electricity price, and the cold release period is a peak period (daytime) with higher electricity price; the cold storage period may be a period in which the renewable energy source has high power generation (for example, in the case of photovoltaic, daytime), and the cold release period may be a period in which the renewable energy source has insufficient or absent power generation (for example, night of a residential building, night of a commercial building, etc.).

To achieve optimal control, the cooling should be released through the ice storage tank 100 at a time when the system is most unsuitable for use with conventional units and is most suitable for use with ice storage.

The method for obtaining the cold load at each time point in the cold release period, the current indoor and outdoor environments, the first refrigeration coefficient under the load and the second refrigeration coefficient in the cold storage period is known to those skilled in the art, and is not described herein.

Total running costTThe constraint formula of (2) is:

；

wherein,for the first refrigeration coefficient under the current indoor and outdoor environment and load, +.>For the second refrigeration coefficient of the cold storage period, < >>For each time point in the cold release period +.>Is >For releasing cold period electricity price->For cold accumulation period electricity price->For cold accumulation and release parameters, when->The cold release decision parameter is given by =1, when +.>And when the temperature is=0, the cold accumulation decision parameter is obtained. />

Referring to fig. 6, the boundary conditions that the total running cost satisfies minimally are: all the cold accumulation amount is consumed in the cold release period. Namely:

；

calculating a plurality of cold accumulation and release parameters with lowest total operation cost to form a decision arrayDecision array based->To the air conditioning systemThe system performs optimal control to reduce the running cost.

Referring to fig. 7 and fig. 8, the calculation of the cooling load involves the accumulation of ventilation loads of personnel equipment by the date states such as the working day, the holiday, etc. due to the internal heat gain and the heat transfer of the enclosure structure caused by the weather prediction, and the specific requirements are determined according to the actual conditions, and the detailed determination process is not repeated here.

In addition, there is also a case where the actual cooling load does not coincide with the predicted cooling load due to heat loss from the ice bank 100. Therefore, it is necessary to detect the cold accumulation amount of the ice bank 100 in real time, and optimally control the cold release amount or the cold accumulation amount in consideration of the heat loss and the actual cold load of the ice bank 100, thereby reducing the operation cost.

According to the control method of the air conditioning system, the control method of the air conditioning system adopts all the technical schemes of the air conditioning system of the embodiment, so that the control method at least has all the beneficial effects brought by the technical schemes of the embodiment. Under the condition that the cold accumulation amount of an air conditioning system capable of directly making ice through the refrigerating unit 300 can be accurately detected, on the premise that a cold accumulation period is a low electricity price valley period (night) and a cold release period is a peak period (daytime) with a high electricity price, the refrigerating unit 300 and the chilled water unit 500 are controlled to act based on the cold accumulation and cold release parameters by calculating the corresponding cold accumulation and cold release parameters when the total running cost is the lowest, and the refrigerating unit 300 is controlled to prepare an ice water mixture and input into the ice storage tank 100 when the cold accumulation and cold release parameters are cold accumulation decision parameters; when the cold accumulation and release parameters are the cold release decision parameters, the chilled water unit 500 is controlled to prepare chilled water through the ice water mixture in the ice accumulation tank 100, and the optimal control of the air conditioning system is performed through real-time monitoring of the cold accumulation amount, so that the running cost is reduced.

A control method of an air conditioning system according to another embodiment of the present invention will be clearly and completely described with reference to fig. 6 to 10, and it is apparent that the embodiments described below are some, but not all, embodiments of the present invention.

A control method of an air conditioning system according to an embodiment of a fifth aspect of the present invention is applied to the air conditioning system according to the embodiment of the third aspect described above, and the control method includes the steps of:

according to the cold load, the first refrigeration coefficient, the second refrigeration coefficient, the power grid carbon emission factor, the photovoltaic carbon emission factor and the cold accumulation amount at each time point in the cold release period, calculating corresponding cold accumulation and release parameters when the total running carbon emission is the lowest, wherein the cold accumulation and release parameters comprise cold accumulation decision parameters and cold release decision parameters;

For the case where the cold storage period is a period in which the renewable energy generation amount is high (daytime for photovoltaic), and the cold release period is a period in which the renewable energy generation is insufficient or missing (night of residential building, night of commercial building, etc.), the control method is similar to that of the above-described fourth embodiment except that the measurement unit is changed from electricity price to the amount of consideration of the system, such as photovoltaic rate, carbon emission, etc.

Taking carbon emissions as an example, total operating carbon emissionsThe constraint formula of (2) is:

；/>

wherein,for the first refrigeration coefficient under the current indoor and outdoor environment and load, +.>For the second refrigeration coefficient of the cold storage period, < >>For each time point in the cold release period +.>Is>Carbon emission factor (generally grid carbon emission factor) for electricity consumption of conventional units>Is the carbon emission factor of the ice storage unit (for a photovoltaic direct-driven air conditioner, the photovoltaic carbon emission factor),for cold accumulation and release parameters, when->The cold release decision parameter is given by =1, when +.>And when the temperature is=0, the cold accumulation decision parameter is obtained.

According to the control method of the air conditioning system, the control method of the air conditioning system adopts all the technical schemes of the air conditioning system of the embodiment, so that the control method at least has all the beneficial effects brought by the technical schemes of the embodiment. Under the condition that the cold accumulation amount of an air conditioning system capable of directly making ice through the refrigerating unit 300 can be accurately detected, on the premise that a cold accumulation period is a period with high renewable energy power generation (in terms of photovoltaics, daytime) and a cold release period is a period with insufficient or missing renewable energy power generation (night of resident buildings, night of commercial buildings and the like), the refrigerating unit 300 and the chilled water unit 500 are controlled to operate based on the cold accumulation and release parameters by calculating corresponding cold accumulation and release parameters when the total operation cost is the lowest, and the refrigerating unit 300 is controlled to prepare an ice-water mixture and input into the ice accumulation tank 100 when the cold accumulation and release parameters are cold accumulation decision parameters; when the cold accumulation and release parameters are the cold release decision parameters, the chilled water unit 500 is controlled to prepare chilled water through the ice water mixture in the ice accumulation tank 100, and the optimal control of the air conditioning system is performed through real-time monitoring of the cold accumulation amount, so that the running cost is reduced.

In addition, an embodiment of the sixth aspect of the present invention further provides a master control device, and an embodiment of the seventh aspect of the present invention further provides a control device, where the master control device and the control device both include: memory, a processor, and a computer program stored on the memory and executable on the processor. The processor and the memory may be connected by a bus or other means.

The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The non-transitory software programs and instructions required to implement the cold storage amount detection method and the control method of the air conditioning system of the above embodiments are stored in the memory, and when executed by the processor, the cold storage amount detection method and the control method of the air conditioning system of the above embodiments are executed.

The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The eighth aspect of the present invention also provides a first computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller, for example, by a processor of the above-described master device, so that the above-described processor executes the cold accumulation amount detection method in the above-described embodiment.

The ninth aspect of the present invention also provides a second computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller, for example, by a processor of the control apparatus, which may cause the processor to execute the control method of the air conditioning system in the above embodiment.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. The utility model provides a cold-storage volume detecting system, is applied to the ice groove that holds, hold ice water mixture in the ice groove, its characterized in that, cold-storage volume detecting system includes:

2. The cold accumulation amount detection system according to claim 1, wherein the detection means includes:

the first electrodes are uniformly arranged on the first surface;

3. A cold accumulation amount detection method, which is applied to the master control device according to claim 1 or 2, comprising the steps of:

4. The cold accumulation amount detection method according to claim 3, wherein the correspondence relationship is obtained by:

5. The method of detecting a cold accumulation amount according to claim 4, wherein the establishing the correspondence relationship by machine learning from the simulated concentration data and the simulated electrical data corresponding to different grids includes the steps of:

6. The method of claim 3, wherein the constraint formula of the total mass of ice in the ice water mixture in the ice storage tank is:

；

7. The method for detecting the amount of cold accumulation according to claim 3 or 6, wherein a constraint formula of the total mass of water in the ice water mixture in the ice accumulation tank is:

；

8. The utility model provides an air conditioning system, includes the air conditioner body, locates the internal ice groove, refrigerating unit and the frozen water unit of holding of air conditioner, refrigerating unit is used for preparing the ice water mixture and inputs hold in the ice groove, the period of preparing the ice water mixture is cold-storage period, the frozen water unit with hold ice groove connection, the period of inputting the ice water mixture in the ice groove into frozen water unit preparation frozen water is the cooling-releasing period, its characterized in that, air conditioning system still includes:

The cold accumulation amount detecting system according to claim 1 or 2, provided on the ice accumulation tank, for detecting a cold accumulation amount;

9. A control method of an air conditioning system, applied to the air conditioning system according to claim 8, comprising the steps of:

10. A control method of an air conditioning system, applied to the air conditioning system according to claim 8, comprising the steps of: