Air conditioner control method and device, air conditioner unit and computer readable storage medium

Abstract

The application provides an air conditioner control method and device, an air conditioner unit and a computer readable storage medium. The method comprises the following steps: obtaining the current cold carrier concentration of the cold carrier in the air conditioner unit; determining the operation compensation parameter corresponding to the current cold carrier concentration; obtaining the first operation parameter of the air conditioner unit; compensating the first operation parameter by using the operation compensation parameter to obtain the second operation parameter; and controlling the compressor in the air conditioner unit to operate at the second operation parameter. The operation compensation parameter is obtained based on the current cold carrier concentration of the air conditioner unit, and the operation parameter of the compressor is compensated by using the operation compensation parameter, so that the compressor can perform refrigeration based on the actual physical properties of the cold carrier, the refrigeration target of the air conditioner unit can be more accurately achieved, and the reliability of the unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, and in particular to an air conditioner control method and device, an air conditioner unit, and a computer readable storage medium. BACKGROUND

[0002] The water-cooled air conditioner on the market has a clear water temperature requirement for the carrier refrigerant. When the water temperature is low, such as below 10°C, antifreeze, such as ethylene glycol, needs to be added to the carrier refrigerant. However, when the carrier refrigerant is an ethylene glycol aqueous solution with different concentrations, the thermal physical properties of the ethylene glycol aqueous solution are different, which causes great changes in the physical properties of the carrier refrigerant of the air conditioner unit, directly affecting the refrigeration effect and operation reliability of the unit. SUMMARY

[0003] The main purpose of the present application is to provide an air conditioner control method and device, an air conditioner unit, and a computer readable storage medium, which aims to solve the problem that the concentration of the carrier refrigerant changes, affecting the refrigeration effect and reliability of the unit in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides an air conditioner control method, which comprises the following steps:

[0005] obtaining the current carrier refrigerant concentration of the carrier refrigerant in the air conditioner unit;

[0006] determining an operation compensation parameter corresponding to the current carrier refrigerant concentration;

[0007] obtaining a first operation parameter of the air conditioner unit;

[0008] compensating the first operation parameter by the operation compensation parameter to obtain a second operation parameter;

[0009] controlling the compressor in the air conditioner unit to operate at the second operation parameter.

[0010] Optionally, the determination of the operation compensation parameter corresponding to the current carrier refrigerant concentration comprises:

[0011] obtaining a first specific heat capacity corresponding to the current carrier refrigerant concentration, and a second specific heat capacity corresponding to pure water;

[0012] calculating a specific heat capacity difference between the first specific heat capacity and the second specific heat capacity;

[0013] obtaining a carrier refrigerant attenuation coefficient according to the specific heat capacity difference, wherein the specific heat capacity difference and the carrier refrigerant attenuation coefficient are positively correlated;

[0014] generating the operation compensation parameter containing the carrier refrigerant attenuation coefficient.

[0015] Optionally, the obtaining the first operation parameter of the air conditioning unit comprises:

[0016] obtaining a target control temperature and a current indoor temperature;

[0017] calculating a temperature difference between the target control temperature and the current indoor temperature;

[0018] obtaining a refrigeration performance parameter of the air conditioning unit, and calculating an initial refrigeration demand according to the temperature difference and the refrigeration performance parameter;

[0019] generating the first operation parameter containing the initial refrigeration demand.

[0020] Optionally, the compensating the first operation parameter by the operation compensation parameter to obtain a second operation parameter comprises:

[0021] obtaining an initial refrigeration demand in the first operation parameter, wherein the initial refrigeration demand is a refrigeration demand corresponding to a current cold carrier concentration of 0;

[0022] obtaining a cold carrier attenuation coefficient in the operation compensation parameter;

[0023] increasing the initial refrigeration demand based on the cold carrier attenuation coefficient to obtain a target refrigeration demand;

[0024] generating the second operation parameter containing the target refrigeration demand.

[0025] Optionally, the compensating the first operation parameter by the operation compensation parameter to obtain a second operation parameter comprises:

[0026] obtaining a first cold carrier freezing point temperature in the first operation parameter and a second cold carrier freezing point temperature in the operation compensation parameter, wherein the second cold carrier freezing point temperature is a freezing point temperature of the cold carrier corresponding to a current cold carrier concentration;

[0027] updating the first cold carrier freezing point temperature in the first operation parameter to the second cold carrier freezing point temperature;

[0028] generating the second operation parameter containing the second cold carrier freezing point temperature.

[0029] Optionally, the controlling the compressor in the air conditioning unit to operate according to the second operation parameter comprises:

[0030] obtaining a target refrigeration demand in the second operation parameter;

[0031] obtaining a compressor displacement corresponding to the compressor;

[0032] calculating a target frequency according to the target refrigeration requirement and the compressor displacement;

[0033] controlling the compressor to operate at the target frequency.

[0034] Optionally, the controlling the compressor in the air conditioning unit to operate at the second operating parameter comprises:

[0035] obtaining a low-pressure temperature of the air conditioning unit and a second refrigerant freezing point temperature in the second operating parameter;

[0036] determining whether a freezing point difference value of the low-pressure temperature minus the second refrigerant freezing point temperature is less than a preset threshold value;

[0037] if the freezing point difference value is less than the preset threshold value, reducing an operating frequency of the compressor.

[0038] To achieve the above object, the present application further provides an air conditioner control device, which comprises:

[0039] a first obtaining module, configured to obtain a current refrigerant concentration of a refrigerant in an air conditioning unit;

[0040] a first determining module, configured to determine an operating compensation parameter corresponding to the current refrigerant concentration;

[0041] a second obtaining module, configured to obtain a first operating parameter of the air conditioning unit;

[0042] a first compensation module, configured to compensate the first operating parameter by the operating compensation parameter to obtain a second operating parameter;

[0043] a first control module, configured to control a compressor in the air conditioning unit to operate at the second operating parameter.

[0044] To achieve the above object, the present application further provides an air conditioning unit, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program implements the steps of the air conditioner control method when executed by the processor.

[0045] To achieve the above object, the present application further provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the air conditioner control method when executed by a processor.

[0046] The application provides an air conditioner control method and device, an air conditioner unit and a computer readable storage medium. BRIEF DESCRIPTION OF DRAWINGS

[0047] The drawings incorporated in the specification illustrate embodiments consistent with the present application and serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without any creative effort.

[0049] One or more embodiments are illustrated by the pictures in the drawings corresponding to the embodiments, and the illustrative description does not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings do not constitute a proportional limitation.

[0050] Figure 1 The flowchart of the first embodiment of the air conditioner control method of the present application is shown in the figure.

[0051] Figure 2 The detailed flowchart of the air conditioner control method of the present application is shown in the figure.

[0052] Figure 3 The module structure diagram of the air conditioner unit of the present application is shown in the figure. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the protection scope of the present application.

[0054] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the disclosure, the components and arrangements of the various examples are described. Of course, they are only examples and are intended to be illustrative of the application. Further, the application can be implemented in a wide variety of other ways not expressly described herein. Also, the present application can employ similar materials, components, workmanship, etc. in different examples. Such repetition is expressly not intended to be a limitation in the application.

[0055] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the application. In order to better understand the application, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the application.

[0056] The application provides an air conditioner control method, referring to Figure 1 , Figure 1 The flowchart of the first embodiment of the air conditioner control method of the application is shown. The method comprises the following steps:

[0057] In step S10, the current coolant concentration of the coolant in the air conditioning unit is obtained.

[0058] The air conditioning unit in the embodiment is a water-cooled air conditioning unit.

[0059] The coolant is a carrier for heat transfer in the air conditioning unit. The specific type of coolant can be set based on actual needs. For example, the coolant can be water, and also can be a glycol water solution mixed with glycol and water.

[0060] The coolant concentration is the concentration of glycol in the coolant. For example, if the coolant is mixed with 2 units of glycol and 8 units of water, the corresponding coolant concentration is 20%. The current coolant concentration is the real-time coolant concentration in the air conditioning unit.

[0061] It can be understood that the higher the coolant concentration, the better the antifreeze performance, but the specific heat capacity will decrease, resulting in a decrease in heat exchange capacity and affecting the refrigeration efficiency of the air conditioning unit. Therefore, in the engineering field, the user can adjust the coolant concentration based on actual needs, such as selecting a specific coolant concentration on the main control board of the air conditioning unit. After adjustment, the current coolant concentration can be updated by automatic detection or manual input. It should be noted that the air conditioning unit can operate in a refrigeration mode and a heating mode. The refrigeration efficiency in the embodiments and subsequent embodiments can reflect the temperature control efficiency in the refrigeration mode and the heating mode, respectively.

[0062] Step S20, determining an operation compensation parameter corresponding to the current concentration of the secondary refrigerant;

[0063] At different concentrations of the secondary refrigerant, the refrigeration efficiency of the air conditioning unit is different, and the freezing point temperature of the secondary refrigerant is different. Therefore, in order to ensure the operation of the air conditioning unit at different concentrations of the refrigerant, the operation compensation parameter is determined based on the current concentration of the secondary refrigerant in the embodiment, and the operation compensation parameter compensates the operation of the air conditioning unit.

[0064] The specific compensation of the operation compensation parameter can be set based on the influence of the concentration of the secondary refrigerant on the operation of the air conditioning unit; for example, the higher the concentration of the secondary refrigerant, the lower the refrigeration efficiency of the air conditioning unit, so the operation compensation parameter can be set to improve the operation efficiency of the air conditioning unit, so as to achieve the desired refrigeration efficiency; for example, the higher the concentration of the secondary refrigerant, the lower the freezing point of the secondary refrigerant, so the operation compensation parameter can be set to lower the freezing point temperature limit of the secondary refrigerant when the air conditioning unit is running, so that the air conditioning unit can be kept running at a lower secondary refrigerant temperature.

[0065] Step S30, obtaining a first operation parameter of the air conditioning unit;

[0066] The first operation parameter is the default operation parameter of the air conditioning unit; the default operation parameter can be the parameter before compensation or a fixed initial operation parameter, such as the operation parameter corresponding to the secondary refrigerant being water, i.e. the concentration of the secondary refrigerant being 0.

[0067] The specific parameter type contained in the first operation parameter can be set based on actual needs. It can be understood that since the first operation parameter is compensated based on the concentration of the secondary refrigerant, the first operation parameter contains related parameters that will be affected by the concentration of the secondary refrigerant, such as refrigeration demand, freezing point temperature of the secondary refrigerant, etc.

[0068] Step S40, compensating the first operation parameter by the operation compensation parameter to obtain a second operation parameter;

[0069] After obtaining the operation compensation parameter, the first operation parameter can be compensated based on the operation compensation parameter to obtain the second operation parameter.

[0070] The second operation parameter is the compensated operation parameter.

[0071] Step S50, controlling the compressor in the air conditioning unit to operate at the second operation parameter.

[0072] After the second operating parameter is determined, the compressor is controlled based on the second operating parameter, so that the compressor can achieve the refrigeration effect when the concentration of the carrier refrigerant is 0 under the current concentration of the carrier refrigerant, that is, on the basis of ensuring the refrigeration effect, the freeze-proof effect is realized by increasing the concentration of the carrier refrigerant, thereby avoiding the problem of freeze cracking of the water-cooled plate heat exchanger in the air conditioning unit.

[0073] The embodiment obtains an operating compensation parameter based on the current concentration of the carrier refrigerant of the air conditioning unit, and compensates the operating parameter of the compressor through the operating compensation parameter, so that the compressor can perform refrigeration based on the actual physical properties of the carrier refrigerant, and the refrigeration target of the air conditioning unit can be more accurately achieved, and the reliability of the unit is improved.

[0074] Further, for subsequent Figure 2 In the second embodiment of the air conditioning control method of the present application based on the first embodiment of the present application, the step S20 comprises the steps of:

[0075] Step S21, obtaining a first specific heat capacity corresponding to the current concentration of the carrier refrigerant, and a second specific heat capacity corresponding to pure water;

[0076] The specific heat capacity corresponding to the carrier refrigerant of different concentrations is different, and the corresponding relationship between the specific concentration and the specific heat capacity can be obtained by looking up the table:

[0077]

[0078] It should be noted that the above table is only an example of selected values, and in actual application, more extensive or more intensive concentration and temperature settings can be made; in actual matching, the specific heat capacity corresponding to the nearest concentration in the table can be obtained, for example, the current concentration of the carrier refrigerant is 20%, and the temperature is 20℃, then the specific heat capacity 3.94 of the nearest concentration in the table, i.e. 19.8% at 20℃, can be taken as the corresponding first specific heat capacity. The temperature of the carrier refrigerant can be detected or set based on actual needs. In order to facilitate the description, the temperature of the carrier refrigerant is taken as 20℃ in the embodiment and subsequent embodiments.

[0079] For example, if the current concentration of the carrier refrigerant is 16%, the freezing point temperature corresponding to the concentration of the carrier refrigerant is -7℃, and the corresponding specific heat capacity is 4.02 when the temperature of the current carrier refrigerant is 50℃.

[0080] The second specific heat capacity is the specific heat capacity corresponding to pure water, that is, the specific heat capacity when the concentration of the carrier refrigerant is 0, and the second specific heat capacity is 4.2.

[0081] Step S22, calculating the specific heat capacity difference between the first specific heat capacity and the second specific heat capacity;

[0082] Step S23, obtaining a coolant attenuation coefficient according to the specific heat capacity difference, wherein the specific heat capacity difference is positively correlated with the coolant attenuation coefficient;

[0083] Step S24, generating the operation compensation parameter containing the coolant attenuation coefficient.

[0084] It can be understood that the specific heat capacity of the coolant added with ethylene glycol is less than that of the pure water coolant; the higher the concentration is, the smaller the corresponding specific heat capacity is; and the smaller the specific heat capacity is, the lower the heat transfer efficiency of the coolant is, and therefore, it is more necessary to improve the operation efficiency of the compressor to ensure the refrigeration efficiency of the air conditioning unit; therefore, in the embodiment, the specific heat capacity difference between the first specific heat capacity and the second specific heat capacity is calculated, specifically, the difference obtained by subtracting the first specific heat capacity from the second specific heat capacity; since the specific heat capacity of the coolant added with ethylene glycol is less than that of the pure water coolant, the specific heat capacity difference is an integer, and increases with the increase of the current coolant concentration; therefore, in the embodiment, the coolant attenuation coefficient is positively correlated with the specific heat capacity difference; so that in the case that the current coolant concentration is greater, resulting in lower operation efficiency, a greater coolant attenuation coefficient is set, which can increase the compensation for the operation parameter and improve the refrigeration efficiency, thereby ensuring the refrigeration target of the air conditioning unit.

[0085] The coolant attenuation coefficient is used to indicate the attenuation of the heat transfer efficiency of the coolant; compensation is made based on the coolant attenuation coefficient, so that the operation efficiency can be improved based on the attenuation of the heat transfer efficiency of the coolant, and the refrigeration target of the air conditioning unit is ensured. Specifically:

[0086]

[0087] Wherein, Ks is the coolant attenuation coefficient; C1 is the first specific heat capacity; and C2 is the second specific heat capacity.

[0088] For example, when the current coolant concentration is 19.8%, and the current coolant temperature is 20 degrees Celsius, the second specific heat capacity is 3.899 kJ / kg.K according to the table; and the coolant attenuation coefficient is calculated as follows:

[0089]

[0090] Further, in the third embodiment of the air conditioning control method of the present application based on the first embodiment of the present application, the step S30 comprises the steps of:

[0091] Step S31, obtaining a target control temperature and a current indoor temperature;

[0092] Step S32, calculating a temperature difference between the target control temperature and the current indoor temperature;

[0093] In step S33, a refrigeration performance parameter of the air conditioning unit is acquired, and an initial refrigeration demand is calculated according to the temperature difference and the refrigeration performance parameter.

[0094] In step S34, the first operation parameter including the initial refrigeration demand is generated.

[0095] The target control temperature is a temperature that needs to be reached by the air conditioning unit in a refrigeration scenario; the target control temperature can be automatically set by the system based on actual conditions, or can be set by a user based on actual needs.

[0096] The current indoor temperature is a real-time temperature in the refrigeration scenario; the current indoor temperature can be collected by a temperature sensor.

[0097] The temperature difference indicates a difference between the target control temperature and the current indoor temperature; in order to make the indoor temperature reach the target control temperature, the air conditioning unit needs to eliminate the temperature difference, and therefore the refrigeration demand can be reflected by the temperature difference.

[0098] The refrigeration performance parameter is used to reflect a refrigeration capacity of the air conditioning unit; the refrigeration performance parameter is fixedly set when the air conditioning unit is shipped; it should be noted that the air conditioning unit includes multiple indoor units, and different indoor units are respectively provided with different refrigeration performance parameters, and therefore the initial refrigeration demand can be calculated by comprehensively considering the refrigeration performance parameters of the multiple indoor units.

[0099] The initial refrigeration demand is a refrigeration demand when the concentration of the secondary refrigerant is 0; at this time, the refrigeration demand does not consider a refrigeration efficiency reduction caused by the concentration of the secondary refrigerant; specifically:

[0100]

[0101] Wherein, n is a number of the indoor units that are turned on in the air conditioning unit; tsj is the current indoor temperature; tnj is the target control temperature; kcn is the refrigeration performance parameter of the nth indoor unit. n It can be understood that the initial refrigeration demand is updated in real time, and when the turned-on indoor units change, such as when the turned-on indoor units are switched to be turned off or the turned-off indoor units are switched to be turned on, the initial refrigeration demand needs to be calculated based on the actual turned-on indoor units.

[0102] Further, in the fourth embodiment of the air conditioning control method of the present application based on the first embodiment of the present application, the step S40 includes the following steps:

[0103] In step S41, the initial refrigeration demand in the first operation parameter is acquired, wherein the initial refrigeration demand is a refrigeration demand corresponding to the current concentration of the secondary refrigerant being 0;

[0104] Step S42, obtaining the refrigerant attenuation coefficient in the operation compensation parameter;

[0105] Step S43, increasing the initial refrigeration demand based on the refrigerant attenuation coefficient to obtain a target refrigeration demand;

[0106] Step S44, generating the second operation parameter containing the target refrigeration demand.

[0107] After the initial refrigeration demand and the refrigerant attenuation coefficient are determined, the initial refrigeration demand can be compensated by the refrigerant attenuation coefficient; specifically, since the refrigerant attenuation coefficient is positively correlated with the specific heat capacity difference, the initial refrigeration demand is increased based on the refrigerant attenuation coefficient, so that the target refrigeration demand can compensate for the heat transfer attenuation of the refrigerant; specifically:

[0108]

[0109] Wherein, Qm is the target refrigeration demand.

[0110] The greater the current refrigerant concentration, the greater the corresponding specific heat capacity difference, the greater the corresponding refrigerant attenuation coefficient, and the greater the target refrigeration demand obtained after compensation, so that the operation efficiency of the air conditioning unit is greater; in the case that the refrigerant concentration leads to the reduction of heat transfer efficiency, the operation efficiency of the air conditioning unit is increased correspondingly to ensure the refrigeration efficiency of the air conditioning unit.

[0111] Further, in the fifth embodiment of the air conditioning control method of the present application based on the first embodiment of the present application, the step S40 comprises the steps of:

[0112] Step S45, obtaining the first refrigerant freezing point temperature in the first operation parameter and the second refrigerant freezing point temperature in the operation compensation parameter, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant corresponding to the current refrigerant concentration;

[0113] Step S46, updating the first refrigerant freezing point temperature in the first operation parameter to the second refrigerant freezing point temperature;

[0114] Step S47, generating the second operation parameter containing the second refrigerant freezing point temperature.

[0115] The freezing point temperature of the secondary refrigerant is the temperature at which the secondary refrigerant freezes; it can be understood that when the temperature of the evaporative heat exchanger, i.e., the low-pressure temperature, is lowered to the freezing point temperature, the secondary refrigerant will freeze in the heat exchanger, causing the water-cooled plate heat exchanger to crack; therefore, an anti-freezing operation needs to be set; specifically, the anti-freezing operation is based on the freezing point temperature of the secondary refrigerant; when the low-pressure temperature is lowered to or is about to be lowered to the freezing point temperature of the secondary refrigerant, the anti-freezing operation is performed, specifically, the frequency of the compressor is lowered, thereby increasing the low-pressure temperature and preventing the water-cooled plate heat exchanger from cracking.

[0116] As can be known from the foregoing secondary refrigerant concentration table, the higher the secondary refrigerant concentration, the lower the corresponding freezing point temperature; therefore, the judgment basis of the anti-freezing operation is also lower, so that the compressor can operate at a higher frequency at a lower low-pressure temperature; if the freezing point temperature is not updated based on the actual secondary refrigerant concentration, the anti-freezing operation will limit the operation of the compressor based on the freezing point temperature of the secondary refrigerant concentration of 0; for example, if the current secondary refrigerant concentration is 19.8%, the corresponding freezing point temperature is -10°C, as can be known from the table; if the anti-freezing operation is performed according to the freezing point temperature of the secondary refrigerant concentration of 0, i.e., 0°C, the compressor frequency will start to be displayed when the low-pressure temperature approaches 0°C, thereby causing the compressor to be unable to normally operate at a low-pressure temperature of -10°C to 0°C, and the performance of the air conditioning unit is reduced; therefore, in the present embodiment, the first freezing point temperature of the secondary refrigerant is updated by the second freezing point temperature of the secondary refrigerant, so that the anti-freezing operation can be performed based on the actual secondary refrigerant concentration; specifically, the step S50 comprises the steps of:

[0117] Step S55: acquiring the low-pressure temperature of the air conditioning unit and the second freezing point temperature of the secondary refrigerant in the second operating parameter;

[0118] Step S56: judging whether the ice point difference, i.e., the low-pressure temperature minus the second freezing point temperature of the secondary refrigerant, is less than a preset threshold value;

[0119] Step S57: if the ice point difference is less than the preset threshold value, the operating frequency of the compressor is lowered.

[0120] After the second freezing point temperature of the secondary refrigerant is updated, the anti-freezing operation is performed based on the second freezing point temperature of the secondary refrigerant; for example, if the current secondary refrigerant concentration is 19.8%, the corresponding freezing point temperature is -10°C, i.e., the second freezing point temperature of the secondary refrigerant is -10°C, as can be known from the table.

[0121] The low-pressure temperature is the actually detected temperature of the water-cooled plate heat exchanger.

[0122] The preset threshold is a margin in the anti-freezing operation; it can be understood that the low-pressure temperature will freeze when reaching the freezing point temperature, and therefore, in order to avoid the freezing phenomenon, the preset threshold is set so that the anti-freezing operation is performed when the low-pressure temperature is still a certain distance from the freezing point temperature, and the low-pressure temperature is ensured not to reach the freezing point temperature; the specific value of the preset threshold can be set based on actual needs, such as 2℃.

[0123] The freezing point difference is the difference between the low-pressure temperature and the second cold carrier freezing point temperature; for example, if the low-pressure temperature is -5℃, the corresponding freezing point difference is -5-(-10)=5.

[0124] If the freezing point difference is less than the preset threshold, it indicates that the low-pressure temperature is about to reach the freezing point temperature, and therefore, the compressor operating frequency is reduced to increase the low-pressure temperature and avoid the freezing of the cold water plate heat exchanger. In the specific reduction of the compressor operating frequency, in order to avoid large fluctuations in the system, a fixed step can be used for frequency reduction, such as setting the step to 5%, and then the compressor frequency is reduced by 5% in each control period until the freezing point difference is greater than the preset threshold; the length of the control period can be set based on actual needs, such as 40s.

[0125] If the freezing point difference is greater than or equal to the preset threshold, it indicates that the difference between the low-pressure temperature and the freezing point temperature is large, and the continued operation of the compressor will not cause the freezing of the cold water plate heat exchanger, and therefore, the compressor operating frequency can be controlled based on actual refrigeration needs without reducing the compressor operating frequency based on the freezing point temperature.

[0126] It should be noted that in the refrigeration mode, the cold water plate heat exchanger serves as a condenser, and therefore, there is no freezing problem; in the heating mode, the cold water plate heat exchanger serves as an evaporator, and when the low-pressure temperature is reduced to the freezing point temperature, the freezing problem will occur, and therefore, the anti-freezing operation in the embodiment can be set to start in the heating mode; for example, if it is determined that the current operating mode of the air conditioning unit is the refrigeration mode or the heating mode, if the current operating mode is the refrigeration mode, step S55 is not performed, and if the current operating mode is the heating mode, step S55 is performed.

[0127] Further, in the sixth embodiment of the air conditioning control method of the application based on the first embodiment of the application, the step S50 comprises the steps of:

[0128] Step S51, obtaining a target refrigeration demand in the second operating parameter;

[0129] Step S52, obtaining a compressor displacement corresponding to the compressor;

[0130] Step S53, calculating a target frequency according to the target refrigeration demand and the compressor displacement;

[0131] Step S54, control the compressor to run at the target frequency.

[0132] The compressor displacement directly affects the refrigeration efficiency of the compressor; the greater the compressor displacement, the greater the refrigeration capacity can be achieved at the same frequency; therefore, in the embodiment, the target frequency is calculated based on the compressor displacement and the target refrigeration demand; specifically:

[0133]

[0134] Wherein, f is the target frequency; e is an empirical value, which can be set based on actual experience, such as 200; R is the compressor displacement.

[0135] For example, if the target refrigeration demand is 20kW and the compressor displacement is 80, the target frequency can be calculated as 20x220 / 80=55Hz.

[0136] After obtaining the target frequency, the compressor can be controlled to run at the target frequency.

[0137] In the embodiment, the target frequency of the compressor can be accurately obtained based on the target refrigeration demand and the compressor displacement.

[0138] It should be noted that, for the above-mentioned method embodiments, in order to simplify the description, they are all described as a series of action combinations, but those skilled in the art should know that the present application is not limited by the order of the described actions, because according to the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0139] From the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and the necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes a plurality of instructions for making a terminal device (which can be a mobile phone, computer, server, or network device, etc.) execute the methods described in the embodiments of the present application.

[0140] The present application also provides an air conditioner control device for implementing the above-mentioned air conditioner control method, the air conditioner control device comprising:

[0141] A first acquisition module for acquiring the current cold carrier concentration of the cold carrier in the air conditioning unit;

[0142] a first determining module, configured to determine an operation compensation parameter corresponding to the current secondary refrigerant concentration;

[0143] a second obtaining module, configured to obtain a first operation parameter of the air conditioning unit;

[0144] a first compensation module, configured to compensate the first operation parameter by the operation compensation parameter to obtain a second operation parameter;

[0145] a first control module, configured to control a compressor in the air conditioning unit to operate at the second operation parameter.

[0146] The air conditioner control apparatus can obtain the operation compensation parameter based on the current secondary refrigerant concentration of the air conditioning unit, and compensate the operation parameter of the compressor by the operation compensation parameter, so that the compressor can perform refrigeration based on the actual physical properties of the secondary refrigerant, and the refrigeration target of the air conditioning unit can be more accurately achieved, and the reliability of the air conditioning unit is improved.

[0147] It should be noted that the first obtaining module in this embodiment can be configured to perform step S10 in the embodiments of the present application, the first determining module in this embodiment can be configured to perform step S20 in the embodiments of the present application, the second obtaining module in this embodiment can be configured to perform step S30 in the embodiments of the present application, the first compensation module in this embodiment can be configured to perform step S40 in the embodiments of the present application, and the first control module in this embodiment can be configured to perform step S50 in the embodiments of the present application.

[0148] Further, the first determining module comprises:

[0149] a first obtaining unit, configured to obtain a first specific heat capacity corresponding to the current secondary refrigerant concentration, and a second specific heat capacity corresponding to pure water;

[0150] a first calculating unit, configured to calculate a specific heat capacity difference between the first specific heat capacity and the second specific heat capacity;

[0151] a first executing unit, configured to obtain a secondary refrigerant attenuation coefficient according to the specific heat capacity difference, wherein the specific heat capacity difference is positively correlated with the secondary refrigerant attenuation coefficient;

[0152] a first generating unit, configured to generate the operation compensation parameter containing the secondary refrigerant attenuation coefficient.

[0153] Further, the second obtaining module comprises:

[0154] a second obtaining unit, configured to obtain a target control temperature and a current indoor temperature;

[0155] a second calculation unit, configured to calculate a temperature difference between the target control temperature and the current indoor temperature;

[0156] a third acquisition unit, configured to acquire a refrigeration performance parameter of the air conditioning unit, and calculate an initial refrigeration demand according to the temperature difference and the refrigeration performance parameter;

[0157] a second generation unit, configured to generate the first operation parameter containing the initial refrigeration demand.

[0158] Further, the first compensation module comprises:

[0159] a fourth acquisition unit, configured to acquire the initial refrigeration demand in the first operation parameter, wherein the initial refrigeration demand is a refrigeration demand corresponding to the current coolant concentration of 0;

[0160] a fifth acquisition unit, configured to acquire a coolant attenuation coefficient in the operation compensation parameter;

[0161] a second execution unit, configured to increase the initial refrigeration demand based on the coolant attenuation coefficient to obtain a target refrigeration demand;

[0162] a third generation unit, configured to generate the second operation parameter containing the target refrigeration demand.

[0163] Further, the first compensation module comprises:

[0164] a sixth acquisition unit, configured to acquire a first coolant freezing point temperature in the first operation parameter and a second coolant freezing point temperature in the operation compensation parameter, wherein the second coolant freezing point temperature is a freezing point temperature of the coolant corresponding to the current coolant concentration;

[0165] a first update unit, configured to update the first coolant freezing point temperature in the first operation parameter to the second coolant freezing point temperature;

[0166] a fourth generation unit, configured to generate the second operation parameter containing the second coolant freezing point temperature.

[0167] Further, the first control module comprises:

[0168] a seventh acquisition unit, configured to acquire a target refrigeration demand in the second operation parameter;

[0169] an eighth acquisition unit, configured to acquire a compressor displacement corresponding to the compressor;

[0170] a third calculation unit, configured to calculate a target frequency according to the target refrigeration demand and the compressor displacement;

[0171] The first control unit is configured to control the compressor to operate at the target frequency.

[0172] Further, the first control module comprises:

[0173] The ninth acquisition unit is configured to acquire a low-pressure temperature of the air conditioning unit and a second refrigerant freezing point temperature in the second operating parameter.

[0174] The first determination unit is configured to determine whether a freezing point difference value obtained by subtracting the second refrigerant freezing point temperature from the low-pressure temperature is less than a preset threshold value.

[0175] The third execution unit is configured to reduce the operating frequency of the compressor if the freezing point difference value is less than the preset threshold value.

[0176] Referring to Figure 3 In terms of hardware structure, the air conditioning unit can include a communication module 10, a memory 20, a processor 30, and the like. In the air conditioning unit, the processor 30 is connected with the memory 20 and the communication module 10 respectively, the memory 20 stores a computer program, the computer program is executed by the processor 30, and the computer program is executed to realize the steps of the above method embodiment.

[0177] The communication module 10 can be connected with external communication equipment through a network. The communication module 10 can receive a request sent by the external communication equipment, and can also send a request, an instruction and information to the external communication equipment. The external communication equipment can be other air conditioning units, servers or Internet of Things devices, such as televisions and the like.

[0178] The memory 20 can be used to store software programs and various data. The memory 20 can mainly include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program required by a function (such as acquiring the current refrigerant concentration of the refrigerant in the air conditioning unit), and the like. The data storage area can include a database, and the data storage area can store data or information created according to the use of the system, and the like. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device.

[0179] The processor 30 is the control center of the air conditioning unit, connects each part of the air conditioning unit by using various interfaces and lines, executes various functions of the air conditioning unit and processes data by running or executing software programs and / or modules stored in the memory 20 and calling data stored in the memory 20, so as to monitor the air conditioning unit as a whole. The processor 30 can include one or more processing units; optionally, the processor 30 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application program, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 30.

[0180] Although Figure 3 Although not shown, the above-mentioned air conditioning unit can also include a circuit control module for connecting with a power supply to ensure the normal work of other components. Those skilled in the art can understand that Figure 3 The structure of the air conditioning unit shown in the above-mentioned embodiments does not constitute a limitation on the air conditioning unit, and can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0181] The present application also provides a computer readable storage medium having a computer program stored thereon. The computer readable storage medium can be Figure 3 The memory 20 in the air conditioning unit, and can also be at least one of a ROM (Read-Only Memory) / RAM (Random Access Memory), a magnetic disk, an optical disk, etc., and the computer readable storage medium includes a plurality of instructions for causing a terminal device (which can be a television, a car, a mobile phone, a computer, a server, a terminal, or a network device, etc.) having a processor to execute the method described in each embodiment of the present application.

[0182] In the present application, the terms "first", "second", "third", "fourth", "fifth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, and those skilled in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.

[0183] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0184] Although the embodiments of the present application have been shown and described above, the scope of protection of the present application is not limited thereto, and it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications and replacements to the above embodiments within the scope of the present application, and these changes, modifications and replacements shall be covered within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. An air conditioning control method, characterized in that, The air conditioning control method includes: Obtain the current refrigerant concentration in the air conditioning unit; Determine the operating compensation parameters corresponding to the current refrigerant concentration; Obtain the first operating parameters of the air conditioning unit; The second operating parameter is obtained by compensating the first operating parameter using the operating compensation parameter. The compressor in the air conditioning unit is controlled to operate at the second operating parameters; The determination of the operating compensation parameters corresponding to the current refrigerant concentration includes: Obtain the first specific heat capacity corresponding to the current refrigerant concentration, and the second specific heat capacity corresponding to pure water; Calculate the difference in specific heat capacity between the first specific heat capacity and the second specific heat capacity; The refrigerant attenuation coefficient is obtained based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient; Generate the operating compensation parameters that include the coolant attenuation coefficient; The process of obtaining the first operating parameter of the air conditioning unit includes: Obtain the target control temperature and the current indoor temperature; Calculate the temperature difference between the target control temperature and the current indoor temperature; The cooling performance parameters of the air conditioning unit are obtained, and the initial cooling demand is calculated based on the temperature difference and the cooling performance parameters. Generate the first operating parameters that include the initial cooling requirements.

2. The air conditioning control method as described in claim 1, characterized in that, The step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the initial cooling demand from the first operating parameters, wherein the initial cooling demand is the cooling demand corresponding to the current refrigerant concentration being 0; Obtain the refrigerant attenuation coefficient from the operating compensation parameters; The initial cooling demand is increased based on the refrigerant decay coefficient to obtain the target cooling demand; Generate the second operating parameters that include the target cooling requirements.

3. The air conditioning control method as described in claim 1, characterized in that, The step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the first refrigerant freezing point temperature from the first operating parameters and the second refrigerant freezing point temperature from the operating compensation parameters, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant at the current refrigerant concentration; Update the first refrigerant freezing point temperature in the first operating parameters to the second refrigerant freezing point temperature; Generate the second operating parameters, which include the freezing point temperature of the second refrigerant.

4. The air conditioning control method as described in claim 1, characterized in that, The control of the compressor in the air conditioning unit to operate at the second operating parameter includes: Obtain the target cooling demand from the second operating parameter; Obtain the compressor displacement corresponding to the compressor; The target frequency is calculated based on the target cooling demand and the compressor displacement. Control the compressor to operate at the target frequency.

5. The air conditioning control method as described in claim 1, characterized in that, The control of the compressor in the air conditioning unit to operate at the second operating parameter includes: Obtain the low-pressure temperature of the air conditioning unit and the freezing point temperature of the second refrigerant in the second operating parameters; Determine whether the freezing point difference between the low-pressure temperature and the freezing point temperature of the second refrigerant is less than a preset threshold. If the freezing point difference is less than the preset threshold, the operating frequency of the compressor is reduced.

6. An air conditioning control device, characterized in that, The air conditioning control device includes: The first acquisition module is used to acquire the current refrigerant concentration in the air conditioning unit; The first determining module is used to determine the operating compensation parameters corresponding to the current refrigerant concentration; The second acquisition module is used to acquire the first operating parameters of the air conditioning unit; The first compensation module is used to compensate the first operating parameters using the operating compensation parameters to obtain the second operating parameters; The first control module is used to control the compressor in the air conditioning unit to operate according to the second operating parameters; The first determining module includes: The first acquisition unit is used to acquire the first specific heat capacity corresponding to the current refrigerant concentration and the second specific heat capacity corresponding to pure water; The first calculation unit is used to calculate the specific heat capacity difference between the first specific heat capacity and the second specific heat capacity; The first execution unit is configured to obtain the refrigerant attenuation coefficient based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient. The first generation unit is used to generate the operating compensation parameters, which include the coolant attenuation coefficient. The second acquisition module includes: The second acquisition unit is used to acquire the target control temperature and the current indoor temperature; The second calculation unit is used to calculate the temperature difference between the target control temperature and the current indoor temperature; The third acquisition unit is used to acquire the cooling performance parameters of the air conditioning unit and calculate the initial cooling demand based on the temperature difference and the cooling performance parameters. The second generation unit is used to generate the first operating parameters that include the initial cooling requirements.

7. An air conditioning unit, characterized in that, The air conditioning unit includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the air conditioning control method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the air conditioning control method as described in any one of claims 1 to 5.

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