CN113449390B

CN113449390B - Air conditioner selection method, system and device

Info

Publication number: CN113449390B
Application number: CN202010229553.XA
Authority: CN
Inventors: 王超; 安普光; 张捷; 孟庆超; 徐龙靖; 梁文龙; 付松辉
Original assignee: Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2024-01-19
Anticipated expiration: 2040-03-27
Also published as: CN113449390A; WO2021190095A1

Abstract

The invention relates to the technical field of air conditioners, in particular to a method, a system and a device for selecting an air conditioner, and aims to solve the problem of how to conveniently, efficiently and accurately determine air conditioner parameters aiming at an air conditioner under a non-standard working condition in an air conditioner research and development design. The invention carries out interpolation calculation based on the corresponding relation among the refrigerating capacity, the refrigerating power, the cold water temperature and the types of the heat exchange devices according to the cold water temperature input value and the refrigerating capacity input value, obtains the refrigerating power corresponding to each type of heat exchange device under the condition of the cold water temperature input value and the refrigerating capacity input value, calculates corresponding pressure drop according to the refrigerating capacity input value and the refrigerating power, and selects the heat exchange device according to the pressure drop requirement. When the air conditioner selection type input parameters do not meet the standard working condition requirements, the accurate pressure drop of the heat exchange device can be obtained through the steps. Meanwhile, because interpolation calculation processes of different heat exchange devices are mutually independent, the type selection calculation can be carried out on a plurality of heat exchange devices at the same time, and the type selection efficiency of the air conditioner is improved.

Description

Air conditioner selection method, system and device

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner type selection method, an air conditioner type selection system and an air conditioner type selection device.

Background

The air conditioning system mainly comprises a compressor, a heat exchange device and other equipment, and the type of the corresponding heat exchange device is mainly determined according to input operation parameters (such as the water inlet and outlet temperature of the heat exchange device) by water cooling air conditioning system type selection software (such as type selection software provided by a heat exchange device supplier) in the research and development design of the water cooling air conditioning system. However, the type selection software of the water-cooling air conditioning system at present can only perform type selection calculation according to operation parameters (such as the chilled water outlet temperature of an evaporator, the cooling water inlet temperature of a condenser and the cold water flow rate) meeting specific standard working conditions (such as working conditions specified by national standard GB/T18430.1-2007 of the people's republic of China), and only one type of heat exchange device can be provided according to each refrigerating capacity requirement, and the actual operation working conditions of the air conditioner often do not meet the requirements of the specific standard working conditions, so the type selection software of the water-cooling air conditioning system is not suitable for selecting the type of the heat exchange device for the air conditioner operated under the non-specific standard working conditions.

Accordingly, there is a need in the art for a new air conditioning option to address the above-described issues.

Disclosure of Invention

The present invention has been made to overcome the above-mentioned drawbacks, and provides an air conditioner type selection method, system and apparatus that solve or at least partially solve the problem in air conditioner development design of how to determine air conditioner parameters conveniently, efficiently and accurately for an air conditioner operating under non-specific standard conditions (for example, the standard conditions are conditions specified in the national standard of the people's republic of China, GB/T18430.1-2007).

In a first aspect, there is provided a method for selecting a type of an air conditioner, the method comprising:

acquiring air conditioner type selection input parameters, wherein the air conditioner type selection input parameters comprise a cold water temperature input value, a heat exchange tube dirt coefficient, a refrigerating capacity input value and one or more heat exchange device types;

calculating cold water correction temperature according to the dirt coefficient of the heat exchange tube, and correcting and calculating the cold water temperature input value according to the cold water correction temperature to obtain corrected cold water temperature;

acquiring a plurality of cold water temperatures, a plurality of refrigerating capacities and a plurality of corresponding refrigerating powers, wherein the cold water temperatures are close to the corrected cold water temperature, the refrigerating capacities are close to the refrigerating capacity input values, and the refrigerating powers are corresponding to each type of heat exchange device, based on a one-to-one correspondence relation among preset refrigerating capacity, refrigerating power, cold water temperature and heat exchange device types, and according to the corrected cold water temperature, the refrigerating capacity input values and the heat exchange device types;

interpolation calculation is carried out according to the corrected cold water temperature and the refrigerating capacity input value, and the obtained cold water temperatures, refrigerating capacities and refrigerating powers corresponding to each type of heat exchange device, the refrigerating powers corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigerating capacity input value are obtained and output according to the calculation result, and the pressure drop corresponding to each type of heat exchange device is calculated according to the refrigerating capacity input value and the refrigerating power, so that the corresponding type of heat exchange device can be selected according to the pressure drop and preset pressure drop requirements;

Wherein the pressure drop is the pressure drop between the cold water inflow side and the cold water outflow side in the heat exchange device, and the corrected cold water temperature is the chilled water outlet temperature or the cooling water inlet temperature.

In one embodiment of the air conditioner type selection method, the method further comprises:

step S1: taking the refrigerating capacity input value as full-load refrigerating capacity, and respectively calculating a first refrigerating capacity calculated value corresponding to each preset target load level;

step S2: judging whether the air conditioner selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, turning to step S4;

step S3: acquiring a first load level input value in the variable flow parameter and judging whether the preset target load level is smaller than or equal to the first load level input value; if yes, go to step S4; if not, turning to step S5;

step S4: acquiring a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, a plurality of cold water flows close to the cold water flow input value, a plurality of corresponding refrigerating powers and a plurality of cold water temperatures based on a one-to-one correspondence between preset refrigerating capacities, refrigerating powers, cold water temperatures and cold water flows and according to the first refrigerating capacity calculated value and the cold water flow input value in the air conditioner type selection input parameter; performing interpolation calculation according to the first refrigerating capacity calculated value, the cold water flow input value, the acquired refrigerating capacities, the refrigerating powers and the cold water temperatures, acquiring and outputting refrigerating powers and the cold water temperatures corresponding to the preset target load level under the condition of the first refrigerating capacity calculated value and the cold water flow input value according to calculation results, and calculating an air conditioner energy efficiency ratio according to the first refrigerating capacity calculated value and the refrigerating powers obtained by interpolation calculation;

Step S5: acquiring a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, a plurality of corresponding refrigerating powers, a plurality of cold water temperatures and a plurality of cold water flows based on a one-to-one correspondence relation among preset refrigerating capacities, refrigerating powers, cold water temperatures and cold water flows and according to the first refrigerating capacity calculated value; and carrying out interpolation calculation according to the first refrigerating capacity calculated value, the acquired refrigerating capacities, the refrigerating powers, the cold water temperatures and the cold water flows, acquiring and outputting the refrigerating power, the cold water temperature and the cold water flow corresponding to the preset target load level under the condition of the first refrigerating capacity calculated value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculated value and the refrigerating power obtained by interpolation calculation.

In one embodiment of the air conditioner type selection method, when the air conditioner type selection input parameter includes a variable water temperature parameter, after step S4 or step S5, the method further includes:

acquiring a second load level input value and a variable water temperature input value in the variable water temperature parameter;

calculating a cold water temperature calculated value corresponding to each preset target load level according to the second load level input value, the variable water temperature input value and the cold water temperature input value and by a method shown in the following formula:

Wherein the T is _{n_calculation} Is the calculated value of the cold water temperature corresponding to the nth target load level, the T is _{m_computation} The load grade is a cold water temperature calculated value corresponding to a target load grade corresponding to the second load grade input value, and n=1, … m, …, N and N are load grades corresponding to full load; the d is a tolerance andthe T is _{N_computation} Is the calculated value of the cold water temperature corresponding to the full load, and the T is _{N_computation} And said T _{m_computation} The values of (2) depend on the cold water temperature input value and the variable water temperature input value, respectively;

based on one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow and according to the cold water temperature, calculating a value T _{n_calculation} And obtaining a calculated value T of the cold water temperature according to a specific cold water flow parameter _{n_calculation} A plurality of cold water temperatures approaching, a plurality of cold water flows approaching the particular cold water flow parameter, and a corresponding plurality of refrigeration capacities and refrigeration powers;

calculating a value T according to the cold water temperature _{n_calculation} And specific cold water flow parameters, and a plurality of acquired cold water temperatures, a plurality of cold water flows and a plurality of cold water flowsInterpolation calculation is carried out on the refrigerating capacity and the refrigerating powers, and a calculated value T of the cold water temperature is obtained and output according to the calculation result _{n_calculation} The refrigerating capacity and the refrigerating power corresponding to the preset target load level under the condition of specific cold water flow parameters are calculated, and the air conditioner energy efficiency ratio is calculated according to the refrigerating capacity and the refrigerating power;

wherein the specific cold water flow parameter is a cold water flow input value in the air conditioner type input parameters when the step S4 is executed, and the specific cold water flow parameter is a cold water flow output by the step S5 according to the interpolation calculation result when the step S5 is executed.

In one embodiment of the air conditioner type selection method, when the air conditioner type selection input parameter includes a target cooling capacity, after step S4 or step S5, the method further includes:

respectively calculating a second refrigerating capacity calculated value corresponding to each preset target load level by taking the target refrigerating capacity as full-load refrigerating capacity;

acquiring a first refrigerating capacity calculated value corresponding to the preset target load level, and outputting refrigerating power and cold water temperature corresponding to the preset target load level under the condition of the first refrigerating capacity calculated value according to an interpolation calculation result in the step S4 or the step S5;

calculating and outputting an actual target power value corresponding to a preset target load level according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and by a method shown in the following formula:

P′ _{n_actual} ＝[(P _n -P _n-1 )×K _ΔC +P _n-1 ]×{1+[(T _n -T _n-1 )×K _ΔC +T _n-1 -T _n ]×k _t }

Wherein said P' _n Is the actual target power value, the P _n And P _n-1 The nth target load level corresponds to the refrigerating power of n-1 target load levels, the T _n And T _n-1 The n-th target load level corresponds to the cold water temperature of n-1 target load levels, respectively, the k _t Is a preset correction coefficient, the K is _ΔC Is the cold quantity difference ratio andthe C' _n Is a second refrigerating capacity calculation value corresponding to the nth target load class, the C _n Is a first refrigerating capacity calculated value corresponding to the nth target load level, the C _n-1 And a first refrigerating capacity calculated value corresponding to the n-1 target load level.

In a second aspect, an air conditioner profiling system is provided, the system comprising:

an input parameter acquisition device configured to acquire air conditioner type selection input parameters including a cold water temperature input value, a heat exchange tube fouling coefficient, a refrigeration capacity input value, and one or more heat exchange device types;

the cold water temperature correction device is configured to calculate cold water correction temperature according to the dirt coefficient of the heat exchange tube, and correct and calculate the cold water temperature input value according to the cold water correction temperature to obtain corrected cold water temperature;

A target parameter obtaining device configured to obtain a plurality of cold water temperatures close to the corrected cold water temperature, a plurality of refrigerating capacities close to the refrigerating capacity input values, and a corresponding plurality of refrigerating powers, which correspond to each type of heat exchange device, respectively, based on a one-to-one correspondence between a preset refrigerating capacity, refrigerating power, cold water temperature, and heat exchange device type, and according to the corrected cold water temperature, the refrigerating capacity input values, and the heat exchange device type;

the target parameter calculation device is configured to perform interpolation calculation according to the corrected cold water temperature and the refrigerating capacity input value, and the obtained cold water temperatures, refrigerating capacities and refrigerating powers corresponding to each type of heat exchange device, obtain and output refrigerating powers corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigerating capacity input value according to calculation results, and calculate pressure drops corresponding to each type of heat exchange device according to the refrigerating capacity input value and the refrigerating powers so as to be capable of selecting corresponding types of heat exchange devices according to the pressure drops and preset pressure drop requirements;

In one embodiment of the air conditioning system described above, the system further comprises an air conditioning parameter calculation device configured to:

In one embodiment of the above air conditioner type selection system, the air conditioner parameter calculation means is configured to perform the following operations after step S4 or step S5 when the air conditioner type selection input parameter further includes a variable water temperature parameter:

Wherein the T is _{n_calculation} Is the calculated value of the cold water temperature corresponding to the nth target load level, the T is _{m_computation} The load grade is a cold water temperature calculated value corresponding to a target load grade corresponding to the second load grade input value, and n=1, … m, …, N and N are load grades corresponding to full load; the d is a tolerance andthe T is _{N_computation} Is the calculated value of the cold water temperature corresponding to the full load, and the T is _{N_meterCalculation of} And said T _{m_computation} The values of (2) depend on the cold water temperature input value and the variable water temperature input value, respectively;

calculating a value T according to the cold water temperature _{n_calculation} Interpolation calculation is carried out on the specific cold water flow parameters, the obtained cold water temperatures, the obtained cold water flows, the obtained refrigerating capacities and the obtained refrigerating powers, and the calculated value T of the cold water temperature is obtained and output according to the calculation result _{n_calculation} The refrigerating capacity and the refrigerating power corresponding to the preset target load level under the condition of specific cold water flow parameters are calculated, and the air conditioner energy efficiency ratio is calculated according to the refrigerating capacity and the refrigerating power;

In one embodiment of the above air conditioner type selection system, the air conditioner parameter calculation means is configured to perform the following operations after step S4 or step S5 when the air conditioner type selection input parameter further includes a target cooling capacity:

Wherein said P' _{n_actual} Is the actual target power value, the P _n And P _n-1 The nth target load level corresponds to the refrigerating power of n-1 target load levels, the T _n And T _n-1 The n-th target load level corresponds to the cold water temperature of n-1 target load levels, respectively, the k _t Is a preset correction coefficient, the K is _ΔC Is the cold quantity difference ratio andthe C' _n Is a second refrigerating capacity calculation value corresponding to the nth target load class, the C _n Is a first refrigerating capacity calculated value corresponding to the nth target load level, the C _n-1 And a first refrigerating capacity calculated value corresponding to the n-1 target load level.

In a third aspect, there is provided a storage device having stored therein a plurality of program codes adapted to be loaded and executed by a processor to perform the air conditioner selection method of any one of the above.

In a fourth aspect, there is provided a control device comprising a processor and a storage device adapted to store a plurality of program codes adapted to be loaded and executed by the processor to perform the air conditioner selection method of any one of the above.

The technical scheme provided by the invention has at least one or more of the following beneficial effects:

In the technical scheme of implementing the invention, firstly, an air conditioner type selection input parameter is obtained, temperature correction is carried out on cold water temperature input values in the air conditioner type selection input parameter according to a heat exchange tube dirt coefficient, then, based on a one-to-one correspondence relation among preset refrigerating capacity, refrigerating power, cold water temperature and heat exchange device types, according to the corrected cold water temperature, the refrigerating capacity input values and the heat exchange device types, a plurality of cold water temperatures close to the corrected cold water temperature, a plurality of refrigerating capacities close to the refrigerating capacity input values and a plurality of corresponding refrigerating powers are obtained for each heat exchange device, finally, interpolation calculation is carried out according to the corrected cold water temperature and the refrigerating capacity input values and the obtained cold water temperatures, the plurality of refrigerating capacities and the plurality of refrigerating power drops for each heat exchange device type, and then, according to the refrigerating capacity input values and the refrigerating power, the pressure drop corresponding to each heat exchange device type is calculated for each heat exchange device type, and then, the corresponding type of heat exchange device can be selected according to the pressure drop and the preset requirement. The refrigerating power of different heat exchange devices under the condition of the air conditioner type selection input parameters is calculated through an interpolation calculation mode, and then the pressure drop of the different heat exchange devices is calculated, so that even if the air conditioner type selection input parameters do not meet the requirements of specific standard working conditions, the refrigerating capacity obtained through the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and heat exchange device types can be interpolated to obtain the accurate refrigerating capacity of the heat exchange devices under the condition of the current air conditioner type selection input parameters, the accurate pressure drop value is calculated, whether the actual pressure drop requirement is met is judged according to the pressure drop value, and whether the heat exchange devices are selected to be used is determined according to the judging result. Meanwhile, because the interpolation calculation processes corresponding to different heat exchange devices are mutually independent and have no interference and influence, the invention can simultaneously perform type selection calculation on a plurality of heat exchange devices under the condition of the current air conditioner type selection input parameters.

Drawings

Embodiments of the invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic flow chart of main steps of an air conditioner type selection method according to one embodiment of the invention;

fig. 2 is a schematic view of the main structure of an air conditioner type system according to an embodiment of the present invention;

list of reference numerals:

11: input parameter acquisition means; 12: a cold water temperature correction device; 13: a target parameter acquisition device; 14: target parameter calculating means.

Detailed Description

Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

In the description of the present invention, "means," "processor" may include hardware, software, or a combination of both. An apparatus may comprise hardware circuitry, various suitable sensors, communication ports, memory, or software components, such as program code, or a combination of software and hardware. The processor may be a central processor, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of both. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and/or B" and may include A alone, B alone or A and B. The singular forms "a", "an" and "the" include plural referents.

Firstly, the heat exchange device is an essential key device of an air conditioner, and when the water-cooled air conditioner works in a refrigerating mode, chilled water is gasified and absorbed in the heat exchange device, so that the aim of refrigeration can be fulfilled; when the water-cooled air conditioner works in a heating mode, cooling water is liquefied and released in the heat exchange device, and the purpose of heating can be achieved. The air conditioner type selection refers to selecting and determining key parameters of equipment such as an air conditioner, a heat exchange device thereof and the like according to design requirements during research and development design of a water-cooling air conditioner. The key parameters of the heat exchange device may include, among others, the pressure drop between the cold water inflow side and the cold water outflow side.

The conventional type selection software of the water-cooling air-conditioning system in the prior art can only perform type selection calculation according to heat exchange device parameters (such as the chilled water outlet temperature of an evaporator, the cooling water inlet temperature of a condenser and the cold water flow rate) meeting specific standards (such as the working conditions specified by national standard GB/T18430.1-2007 of the people's republic of China), and can only provide one type of heat exchange device according to each refrigerating capacity requirement, and the actual running working condition of the air conditioner often does not meet the requirements of the specific standard working condition, so that the type selection software of the water-cooling air-conditioning system is not suitable for selecting the type of the heat exchange device of the air conditioner running under the non-specific standard working condition.

According to the air conditioner type selection method, firstly, air conditioner type selection input parameters (including but not limited to cold water temperature input values, heat exchange tube dirt coefficients, refrigerating capacity input values, one or more heat exchange device types and the like) are obtained, temperature correction is carried out on the cold water temperature input values in the air conditioner type selection input parameters, then based on preset refrigerating capacity, refrigerating power, one-to-one correspondence between the cold water temperature and the heat exchange device types, according to the corrected cold water temperature, the refrigerating capacity input values and the heat exchange device types, a plurality of cold water temperatures close to the corrected cold water temperature, a plurality of refrigerating capacities close to the refrigerating capacity input values and a plurality of refrigerating powers corresponding to the heat exchange device types are obtained, finally, interpolation calculation is carried out on the cold water temperature, the refrigerating capacities and the refrigerating powers corresponding to each type of the obtained heat exchange devices respectively, according to the calculation result, the refrigerating power corresponding to each type of the heat exchange device is obtained and output under the condition of the corrected cold water temperature and the refrigerating capacity input values, and the corresponding pressure drop type of the heat exchange devices can be selected according to preset pressure drop requirements of each type of the heat exchange devices. The pressure drop of different heat exchange devices under the condition of the air conditioner type selection input parameters is calculated in an interpolation calculation mode, so that even if the air conditioner type selection input parameters do not meet the requirements of specific standard working conditions, the accurate refrigerating capacity of the heat exchange devices under the condition of the current air conditioner type selection input parameters can be obtained by interpolation of the pressure drop obtained through the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and heat exchange device types, further an accurate pressure drop value is calculated, whether the actual pressure drop requirement is met is judged according to the pressure drop value, and whether the heat exchange devices are selected to be used is determined according to the judgment result. Meanwhile, because the interpolation calculation processes corresponding to different heat exchange devices are mutually independent and have no interference and influence, the invention can simultaneously perform type selection calculation on a plurality of heat exchange devices under the condition of the current air conditioner type selection input parameters.

Referring to fig. 1, fig. 1 is a flowchart showing main steps of an air conditioner type selection method according to an embodiment of the present invention. As shown in fig. 1, the hollow selection method in the embodiment of the invention mainly includes the following steps:

step S101: and acquiring air conditioner type selection input parameters, wherein the air conditioner type selection input parameters comprise a cold water temperature input value, a heat exchange tube dirt coefficient, a refrigerating capacity input value and one or more heat exchange device types.

The cold water temperature input value refers to a temperature input value of the cold water inflow side and a temperature input value of the cold water outflow side of the heat exchange device. For example: when the heat exchange device is an evaporator, the cold water temperature input value comprises the chilled water inlet temperature and the chilled water outlet temperature of the evaporator; when the heat exchange device is a condenser, the cold water temperature input value comprises the cooling water inlet temperature and the cooling water outlet temperature of the condenser.

The fouling coefficient of the heat exchange tube refers to a coefficient capable of indicating the degree of fouling of the heat exchange tube in the heat exchange device, and a specific value of the fouling coefficient of the heat exchange tube can be set according to actual operation conditions. For example: when the actual operation condition is the condition specified by the national standard GB/T18430.1-2007 of the people's republic of China, the fouling of the heat exchange tube can be set according to the range of the fouling coefficient of the heat exchange tube specified in the standard Specific values of the coefficients. One example is: the fouling factor of the heat exchange tube when the heat exchange device is an evaporator is 0.018m ² K/kW, fouling factor of heat exchange tube is 0.044m when heat exchange device is condenser ² K/kW。

The cooling capacity input value refers to an input value of cooling capacity of an air conditioner. One example is: the refrigeration input was 530kW.

The type of the heat exchange device refers to the type of the heat exchange device such as model information. One example is: when the heat exchange device is an evaporator, the heat exchange device types may include an evaporator a, an evaporator B, and an evaporator C.

Step S102: and calculating cold water correction temperature according to the dirt coefficient of the heat exchange tube, and carrying out correction calculation on the cold water temperature input value according to the cold water correction temperature to obtain corrected cold water temperature. When the heat exchange device is an evaporator, the corrected cold water temperature is the chilled water outlet temperature of the evaporator; when the heat exchange device is a condenser, the corrected cold water temperature is the cooling water inlet temperature of the condenser.

When scaling occurs in the heat exchange tube of the heat exchange device, the scaling generated scaling can influence the heat exchange capability of the heat exchange device, so that the temperature of the cold water outflow side of the heat exchange device is influenced, the scale coefficient of the heat exchange tube is utilized to correct the chilled water outlet temperature and the cooling water inlet temperature, and the chilled water outlet temperature and the cooling water inlet temperature of the heat exchange device which are closer to the actual operation conditions can be obtained.

In this embodiment, the temperature correction temperature can be calculated by a fouling coefficient correction temperature calculation method specified by the national standard of the people's republic of China, GB/T18430.1-2007, and specifically the cold water correction temperature can be calculated according to a method shown by the following formula (1):

the meaning of each parameter in the formula (1) is: TD is the cold water correction temperature, S is the small temperature difference and s= |t _s -t _wl R is the water temperature difference and = |t _wl -t _we |， ILMTD＝f×(q/A)，t _s Is the heat exchange temperature (such as evaporation temperature or condensation temperature), t _we Is the temperature of the cold water inflow side (such as the temperature of the cooling water inflow) of the heat exchange device, t _wl Is the cold water outflow side temperature (such as the cooling water outflow temperature) of the heat exchange device, f is the fouling coefficient of the heat exchange tube, q is the refrigerating capacity, and A is the total heat exchange area of the inner side (the side where the fouling is located) of the heat exchange tube.

In this embodiment, after the cold water correction temperature is obtained by calculation, the cold water temperature input value may be corrected and calculated according to the following steps to obtain a corrected cold water temperature (chilled water outlet temperature or cooling water inlet temperature):

and obtaining the corrected chilled water outlet temperature according to the temperature difference value between the input value of the chilled water outlet temperature and the chilled water correction temperature. One example is: the corrected chilled water outlet temperature is at or near the temperature difference. And acquiring the corrected cooling water inlet temperature according to the temperature sum value of the input value of the cooling water inlet temperature and the cold water correction temperature. One example is: the corrected cooling water inflow temperature is equal to or close to the temperature sum.

Step S103: based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and heat exchange device type and according to the corrected cold water temperature, the refrigerating capacity input value and the heat exchange device type, acquiring a plurality of cold water temperatures, a plurality of refrigerating capacities and a plurality of corresponding refrigerating powers, wherein the cold water temperatures are close to the corrected cold water temperature, the refrigerating capacities are close to the refrigerating capacity input value, and the corresponding refrigerating powers are respectively corresponding to each type of heat exchange device.

The parameters in the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and the type of the heat exchange device can be obtained by carrying out actual operation test by research and development designers under different refrigerating capacity, refrigerating power and other conditions, and then constructing the correspondence of the parameters according to the actual operation test result.

The cold water temperature close to the corrected cold water temperature and the refrigerating capacity close to the refrigerating capacity input value obtained in step S103 will be further described by taking A, B and C as examples of the type of the heat exchanging device, respectively.

First, corresponding "one-to-one correspondence a, b, and C between the refrigerating capacity, refrigerating power, cold water temperature, and heat exchange device type" are constructed for the heat exchange devices A, B and C, respectively. Then, a plurality of cold water temperatures, such as Ta1 and Ta2, close to the corrected cold water temperature, a plurality of refrigeration capacities, such as Ca1 and Ca2, close to the refrigeration capacity input values, and refrigeration powers Pa1 corresponding to Ta1 and Ca1 obtained from the correspondence a, and refrigeration powers Pa2 corresponding to Ta2 and Ca2 obtained from the correspondence a are obtained from the correspondence a. The method for obtaining the cold water temperature, the refrigerating capacity and the refrigerating power of the heat exchange devices B and C is similar to that of the heat exchange device A, and is not repeated here for the sake of brevity

Step S104: and carrying out interpolation calculation according to the corrected cold water temperature and the refrigerating capacity input value, and the acquired cold water temperatures, refrigerating capacities and refrigerating powers corresponding to each type of heat exchange device.

Interpolation computation is a conventional computation method in the field of data computation, the purpose of which is to compute the value of any point within a known data interval. One example is: assuming that the data corresponding to A1 is B1 and the data corresponding to A2 is B2, and that the data corresponding to a is B, a is between A1 and A2, the value of a can be calculated according to the formula (A1-a)/(A1-A2) = (B1-B)/(B1-B2), specifically: from (A1-a)/(A1-A2) = (B1-B)/(B1-B2), it can be seen that: (A1-a) = (B1-B)/(B1-B2) × (A1-A2), and a=a1- (B1-B)/(B1-B2) × (A1-A2) =a1+ (B1-B)/(B1-B2) × (A2-A1) is obtained. Wherein A1, A2, B1, B2, B are all known data.

In this embodiment, each data in the "one-to-one correspondence between preset cooling capacity, cooling power, cooling water temperature and type of heat exchanger" is known data, and the purpose of interpolation calculation is to calculate the cooling power corresponding to the corrected cooling water temperature (cooling water outlet temperature or cooling water inlet temperature) and the cooling capacity input value.

Step S105: and acquiring and outputting the refrigeration power corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigeration capacity input value according to the calculation result, and calculating the pressure drop corresponding to each type of heat exchange device according to the refrigeration capacity input value and the refrigeration power so as to select the corresponding type of heat exchange device according to the pressure drop and the preset pressure drop requirement.

The calculation result refers to the refrigeration power corresponding to the corrected cold water temperature and the refrigeration amount input value, which are interpolated in step S104. The pressure drop refers to the pressure drop between the cold water inflow side and the cold water outflow side of the heat exchange device.

In this embodiment, the pressure drop of the heat exchange device may be calculated according to the refrigerating output input value and the refrigerating power and according to the method shown in the following formula (2):

the meaning of each parameter in the formula (2) is: Δp is the pressure drop across the heat exchanger, γ is the coefficient used to correct the pressure drop across the heat exchanger and γ > 0, which can be provided by the heat exchanger vendor, N is the Number of passes (Number of passes) of the heat exchanger, f is the coefficient of resistance of the heat exchanger, L is the length of the heat exchange tubes within the heat exchanger, di is the inner diameter of the heat exchange tubes within the heat exchanger, ρ is the fluid density, v is the fluid flow rate and v=g/(si·3600), G is the cold water flow rate (chilled water flow rate or cooling water flow rate), si is the flow area of the heat exchanger and in this embodiment Si can be calculated using conventional heat exchanger flow area calculation methods in the air conditioning arts.

The cold water flow G represents the chilled water flow when the heat exchange device is an evaporator and the cold water flow G represents the chilled water flow when the heat exchange device is a condenser. The method for calculating the chilled water flow rate G1 and the cooling water flow rate G2 will be specifically described below by taking the chilled water flow rate G1 and the cooling water flow rate G2 as examples. Specifically, the calculation formulas of the chilled water flow G1 and the cooling water flow G2 are shown in the following formula (3):

the meaning of each parameter in the formula (3) is: q is the refrigerating output input value, W is the refrigerating power corresponding to the refrigerating output input value obtained by interpolation calculation in the step S104, and DeltaT is the water inlet and outlet temperature difference of the heat exchange device.

The pressure drop of different heat exchange devices under the condition of the same air conditioner type selection input parameters can be obtained through the steps, so that air conditioner designers can select proper heat exchange devices according to the pressure drop requirements of the actual heat exchange devices.

Further, the air conditioner type selection method shown in fig. 1 may further include an air conditioner type selection calculation step for an arbitrary load level in one embodiment. The air conditioner selection calculation step for any load level specifically comprises the following steps:

step S201: and calculating a first refrigerating capacity calculated value corresponding to each preset target load level by taking the refrigerating capacity input value as the full-load refrigerating capacity (the load level corresponding to the refrigerating capacity input value is 100% load).

The preset target load level may be 90% load, 80% load, 70% load, etc. First refrigerating capacity calculation valueWherein C is a refrigerating capacity input value, G' is a load level corresponding to the refrigerating capacity input value, and G is a preset target load level. One example is: if the refrigerating capacity input value c=5004 kW, the load level G' corresponding to the refrigerating capacity input value is=100%, and the preset target load level g=90%, the first refrigerating capacity calculation value c1=4504 kW.

Step S202: judging whether the air conditioner type-selecting input parameters comprise variable flow parameters or not; if yes, go to step S203; if not, go to step S205.

The variable flow parameter includes a first load level input value, and when a certain preset target load level in step S201 is less than or equal to the first load level input value (for example, the first load level input value is 70% load, and a certain preset target load level is 60% load), the flow of the heat exchange device is controlled to be the cold water flow input value in the air conditioner selected input parameter under the target load level, namely, the fixed cold water flow is controlled. When a certain preset target load level in step S201 is greater than the first load level input value (for example, the first load level input value is 70% load, and a certain preset target load level is 80% load), performing interpolation calculation according to other parameters in the air conditioner type selection input parameters to obtain the cold water flow of the heat exchange device under the target load level, namely, controlling the cold water flow.

Step S203: based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow, and according to the first refrigerating capacity calculated value and the cold water flow input value in the air conditioner type selection input parameter, a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, a plurality of cold water flows close to the cold water flow input value, and a plurality of refrigerating powers and a plurality of cold water temperatures corresponding to the refrigerating capacities are obtained.

The parameters in the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow can be obtained by carrying out actual operation test by research and development designers under different refrigerating capacity, refrigerating power and other conditions, and then constructing the correspondence of the parameters according to the actual operation test result. The method for acquiring the related data according to the corresponding relationship in the embodiment is similar to the method for acquiring the related data according to the corresponding relationship in the step S103, and is not repeated here for brevity of description.

Step S204: and (3) carrying out interpolation calculation according to the first refrigerating capacity calculated value, the cold water flow input value and the refrigerating capacities, the refrigerating powers and the cold water temperatures obtained in the step (S203), obtaining and outputting the refrigerating powers and the cold water temperatures corresponding to the target load levels preset under the condition of the first refrigerating capacity calculated value and the cold water flow input value according to the calculation results, calculating the air conditioner energy efficiency ratio (COP 1) according to the first refrigerating capacity calculated value and the refrigerating powers obtained by interpolation calculation, and then stopping the type selection calculation. Wherein, the air conditioner energy efficiency ratio C1 is a first refrigerating capacity calculation value, and P is a refrigerating power obtained by interpolation calculation. The cold water flow of the heat exchange device is a fixed cold water flow input value, namely fixed cold water flow control, under the preset target load level through the steps S201-S204. The interpolation calculation process in this embodiment is similar to the interpolation calculation process described in the aforementioned step S104, and for brevity of description, the description is omitted here.

Step S205: based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow, and according to the first refrigerating capacity calculated value, a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, and a plurality of refrigerating powers, a plurality of cold water temperatures and a plurality of cold water flow corresponding to the refrigerating capacities are obtained.

Step S206: interpolation calculation is performed according to the first refrigerating capacity calculated value and the refrigerating capacities, the refrigerating powers, the cold water temperatures and the cold water flows obtained in the step S205, refrigerating powers, cold water temperatures and cold water flows corresponding to target load levels preset under the condition of the first refrigerating capacity calculated value are obtained and output according to the calculation results, the air conditioner energy efficiency ratio COP1 is calculated according to the first refrigerating capacity calculated value and the refrigerating powers obtained through interpolation calculation, and then model selection calculation is stopped. Wherein, the air conditioner energy efficiency ratio C1 is a first refrigerating capacity calculation value, and P is a refrigerating power obtained by interpolation calculation. Through the step S201-step S204 and step S206, the cold water flow rate of the heat exchange device under different preset target load levels can be changed according to the change of the first refrigeration rate calculated value corresponding to the preset target load level, namely, the variable flow control of the cold water flow rate is realized. The interpolation calculation process in this embodiment is similar to the interpolation calculation process described in the aforementioned step S104, and for brevity of description, the description is omitted here.

Further, in one embodiment, the air conditioner model selection method shown in fig. 1 may further include a variable water temperature control step after performing the steps S204 and S206. The variable water temperature control step specifically comprises the following steps:

step S207: and acquiring a second load level input value and a variable water temperature input value in the variable water temperature parameter.

Step S208: calculating a cold water temperature calculated value corresponding to each preset target load level according to the second load level input value, the variable water temperature input value and the cold water temperature input value and by a method shown in the following formula (4):

the meaning of each parameter in the formula (4) is: t (T) _{n_calculation} Is the calculated value of the cold water temperature corresponding to the nth target load level, T _{m_computation} A cold water temperature calculation value corresponding to a target load level with a load level being a second load level input value, n=1, … m, …, N being a load level corresponding to full load; d is a tolerance andT _{n_computation} Is the calculated value of the cold water temperature corresponding to full load, T _{N_computation} And T _{m_computation} The values of (2) depend on the cold water temperature input value and the variable water temperature input value, respectively. One example is: the heat exchange device is a condenser, the cooling water inlet temperature in the cold water temperature input value is 30 ℃, the cooling water inlet temperature in the variable water temperature parameter is 24 ℃, the target load level comprises 10% load, 20% load, 30% load, 40% load, 50% load, 60% load, 70% load, 80% load, 90% load and 100% load, the second load level input value is 50% load, T _{N_computation} And T _{m_computation} The tolerance d=1.8 ℃ can be calculated as 32 ℃ and 23 ℃, respectively. The calculated cold water temperatures from 60% load to 100% load were 24.8 ℃, 26.6 ℃, 28.4 ℃, 30.2 ℃ and 32 ℃ in this order according to the above data and formula (4).

Step S209: based on the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow and according to the cold water temperature, calculating a value T _{n_calculation} And the specific cold water flow parameter is used for obtaining a calculated value T of the temperature of the cold water _{n_calculation} A plurality of cold water temperatures approaching, a plurality of cold water flows approaching a particular cold water flow parameter, and a corresponding plurality of refrigeration capacities and refrigeration powers.

In the present embodiment, when the variable water temperature control step is performed after the step S204 is performed, the specific cold water flow rate parameter is the cold water flow rate input value among the air conditioner selection input parameters. If the variable water temperature control step is performed after the step S206 is performed, the specific cold water flow parameter is the cold water flow outputted by the step S206 according to the interpolation calculation result.

Step S210: calculated value T based on cold water temperature _{n_calculation} Interpolation calculation is carried out on the specific cold water flow parameters, the obtained cold water temperatures, the cold water flows, the refrigerating capacities and the refrigerating powers, and a calculated value T of the cold water temperature is obtained and output according to the calculation result _{n_calculation} And calculating the air conditioner energy efficiency ratio COP2 according to the refrigerating capacity and the refrigerating power. Wherein, the air conditioner energy efficiency ratio C2 is the refrigerating capacity obtained by interpolation calculation, and P is the refrigerating power obtained by interpolation calculation. For the preset target load levels with load levels less than or equal to the second load level input value, the cold water temperature of the heat exchange device at the target load levels can be made to be a fixed cold water temperature calculated value T through steps S207-S209 _{n_calculation} I.e. a fixed cold water temperature control is achieved. For preset target load levels with load levels greater than the second load level input value, the cold water temperature of the heat exchange device under the target load levels can be calculated according to the cold water temperature calculated value T corresponding to each target load level through the steps S207-S209 _{n_calculation} Is changed by changing, i.e. changing water with different load levelsAnd (5) temperature control. The interpolation calculation process in this embodiment is similar to the interpolation calculation process described in the aforementioned step S104, and for brevity of description, the description is omitted here.

Further, in one embodiment, the air conditioner type selection method shown in fig. 1 may further include a target cooling capacity control step after performing the steps S204 and S206. The target refrigerating capacity control step specifically comprises the following steps:

step S211: and taking the target refrigerating capacity as full-load refrigerating capacity (the load grade corresponding to the target refrigerating capacity can be 100% load), and respectively calculating a second refrigerating capacity calculated value corresponding to each preset target load grade.

Step S212: the first refrigeration capacity calculated value corresponding to the preset target load level obtained in the step S201 is obtained, and the refrigeration power and the cold water temperature corresponding to the preset target load level under the condition of the first refrigeration capacity calculated value are output in the step S204 or the step S206 according to the interpolation calculation result.

Step S213: calculating and outputting an actual target power value corresponding to a preset target load level according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and according to a method shown in the following formula (5):

P′ _{n_actual} ＝[(P _n -P _n-1 )×K _ΔC +P _n-1 ]×{1+[(T _n -T _n-1 )×K _ΔC +T _n-1 -T _n ]×k _t } (5)

The meaning of each parameter in the formula (5) is: p'. _{n_actual} Is the actual target power value, P _n And P _n-1 The n-th target load level and the n-1 target load levels are respectively the refrigerating power T _n And T _n-1 The n-th target load level corresponds to the cold water temperature, k of n-1 target load levels _t Is a preset correction coefficient, K _ΔC Is the cold quantity difference ratio andC′ _n is the second refrigerating capacity calculated value corresponding to the nth target load level, C _n Is the first refrigerating capacity calculated value corresponding to the nth target load level, C _n-1 And a first refrigerating capacity calculated value corresponding to the n-1 target load level.

The following describes in detail the derivation process of the actual target power value calculation formula shown in the formula (5).

Step 1: the cold quantity difference ratio was calculated according to the method shown in the following formula (6):

the meaning of each parameter in the formula (6) is: k (K) _ΔC Is the cold quantity difference ratio, C' _n Is the second refrigerating capacity calculated value corresponding to the nth target load level, C _n Is the calculated value of the refrigerating capacity corresponding to the nth target load level, C _n-1 And the refrigerating capacity calculated value corresponding to the n-1 target load level.

Step 2: calculating a target power value according to a method shown in the following formula (7):

P′ _n ＝(P _n -P _n-1 )×K _ΔC +P _n-1 (7)

the meaning of each parameter in the formula (7) is: p'. _n Is the target power value, P _n And P _n-1 The n-th target load level corresponds to the n-1 target load levels, respectively.

Step 3: calculating a target cold water temperature according to a method of (8) shown in the following formula:

T′ _n ＝(T _n -T _n-1 )×K _ΔC +T _n-1 (8)

the meaning of each parameter in the formula (8) is: t'. _n Is the target cold water temperature, T _n And T _n-1 The nth target load level corresponds to the cold water temperature of the n-1 target load levels, respectively.

Step 4: calculating a power correction coefficient according to a method shown in the following formula (9):

K _T ＝(T′ _n -T _n )×k _t (9)

formula [ (formula ]9) The meaning of each parameter is as follows: k (K) _T Is the power correction coefficient, k _t Is a preset correction coefficient.

Step 5: calculating an actual target power value according to a method shown in the following formula (10):

P′ _{n_actual} ＝P′ _n ×(1+K _T ) (10)

The meaning of each parameter in the formula (10) is: p'. _{n_actual} Is the actual target power value.

And substituting the formulas (6) - (9) into the formula (10) to obtain the formula (5).

It should be noted that, although the foregoing embodiments describe the steps in a specific order, it will be understood by those skilled in the art that, in order to achieve the effects of the present invention, the steps are not necessarily performed in such an order, and may be performed simultaneously (in parallel) or in other orders, and these variations are within the scope of the present invention.

Referring to fig. 2, fig. 2 is a schematic view of the main structure of an air conditioner type system according to an embodiment of the present invention. As shown in fig. 2, the air conditioning type system according to the embodiment of the present invention mainly includes an input parameter acquiring device 11, a cold water temperature correcting device 12, a target parameter acquiring device 13, and a target parameter calculating device 14. Specifically, the input parameter acquisition device 11 may be configured to acquire air conditioner type input parameters including a cold water temperature input value, a heat exchange tube fouling coefficient, a refrigeration capacity input value, and one or more heat exchange device types. The cold water temperature correction device 12 may be configured to calculate a cold water correction temperature based on the heat exchange tube fouling coefficient, and perform correction calculation on the cold water temperature input value based on the cold water correction temperature to obtain a corrected cold water temperature. The target parameter obtaining device 13 may be configured to obtain a plurality of cold water temperatures close to the corrected cold water temperature, a plurality of refrigerating capacities close to the refrigerating capacity input values, and a corresponding plurality of refrigerating powers, respectively, corresponding to each type of heat exchange device, based on a one-to-one correspondence between a preset refrigerating capacity, refrigerating power, cold water temperature, and heat exchange device type, and according to the corrected cold water temperature, refrigerating capacity input values, and heat exchange device type. The target parameter calculating device 14 may be configured to perform interpolation calculation according to the corrected cold water temperature and the refrigerating capacity input value, and the obtained multiple cold water temperatures, the multiple refrigerating capacities and the multiple refrigerating powers corresponding to each type of heat exchange device, obtain and output the refrigerating powers corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigerating capacity input value according to the calculation result, and calculate the pressure drop corresponding to each type of heat exchange device according to the refrigerating capacity input value and the refrigerating powers, so that the corresponding type of heat exchange device can be selected according to the pressure drop and the preset pressure drop requirement. The pressure drop is the pressure drop between the cold water inflow side and the cold water outflow side in the heat exchange device, and the corrected cold water temperature is the chilled water outlet temperature or the cooling water inlet temperature. In one embodiment, the description of the specific implementation functions may be described with reference to step S101-step S105.

In one embodiment, the system shown in fig. 2 further comprises an air conditioning parameter calculation means which may be configured to:

step S1: and respectively calculating a first refrigerating capacity calculated value corresponding to each preset target load level by taking the refrigerating capacity input value as the full-load refrigerating capacity.

Step S2: judging whether the air conditioner type-selecting input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4.

Step S3: acquiring a first load level input value in the variable flow parameter and judging whether a preset target load level is smaller than or equal to the first load level input value; if yes, go to step S4; if not, go to step S5.

Step S4: acquiring a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, a plurality of cold water flows close to the cold water flow input value, a plurality of refrigerating powers and a plurality of cold water temperatures corresponding to the refrigerating capacities based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow and according to the first refrigerating capacity calculated value and the cold water flow input value in the air conditioner type-selecting input parameter; and carrying out interpolation calculation according to the first refrigerating capacity calculated value, the cold water flow input value, the acquired refrigerating capacities, the refrigerating powers and the cold water temperatures, acquiring and outputting the refrigerating powers and the cold water temperatures corresponding to target load levels preset under the condition of the first refrigerating capacity calculated value and the cold water flow input value according to the calculation results, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculated value and the refrigerating powers obtained by interpolation calculation.

Step S5: based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow, and according to the first refrigerating capacity calculated value, acquiring a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, and a plurality of refrigerating powers, a plurality of cold water temperatures and a plurality of cold water flow corresponding to the refrigerating capacities; and carrying out interpolation calculation according to the first refrigerating capacity calculated value and the acquired refrigerating capacities, refrigerating powers, cold water temperatures and cold water flows, acquiring and outputting the refrigerating power, the cold water temperature and the cold water flow corresponding to a target load level preset under the condition of the first refrigerating capacity calculated value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculated value and the refrigerating power obtained by interpolation calculation. In one embodiment, the description of the specific implementation function of the air conditioning parameter calculation apparatus may be described with reference to step S201 to step S206.

In one embodiment, the air conditioner parameter calculation means may be further configured to perform the following operations after step S4 or step S5 when the air conditioner selection input parameter further includes a variable water temperature parameter:

acquiring a second load level input value and a variable water temperature input value in the variable water temperature parameter; calculating a cold water temperature calculated value corresponding to each preset target load level according to the second load level input value, the variable water temperature input value and the cold water temperature input value and a method shown in a formula (4); based on the one-to-one correspondence between the preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow and according to the cold water temperature, calculating a value T _{n_calculation} And the specific cold water flow parameter is used for obtaining a calculated value T of the temperature of the cold water _{n_calculation} Multiple cold water temperatures approaching, multiple cold water flows approaching specific cold water flow parameters, and corresponding multiple refrigerationA quantity and a plurality of refrigeration powers; calculated value T based on cold water temperature _{n_calculation} Interpolation calculation is carried out on the specific cold water flow parameters, the obtained cold water temperatures, the cold water flows, the refrigerating capacities and the refrigerating powers, and a calculated value T of the cold water temperature is obtained and output according to the calculation result _{n_calculation} The refrigerating capacity and the refrigerating power corresponding to the target load level preset under the condition of the specific cold water flow parameter calculate the air conditioner energy efficiency ratio according to the refrigerating capacity and the refrigerating power; wherein the specific cold water flow parameter is a cold water flow input value of the air conditioner type input parameters when the step S4 is executed, and the specific cold water flow parameter is a cold water flow output by the step S5 according to the interpolation calculation result when the step S5 is executed. In one embodiment, the description of the specific implementation functions may be described with reference to step S207-step S210.

In one embodiment, the air conditioner parameter calculation means may be further configured to perform the following operation after step S4 or step S5 when the air conditioner selection input parameter further includes the target cooling capacity:

Respectively calculating a second refrigerating capacity calculated value corresponding to each preset target load level by taking the target refrigerating capacity as full-load refrigerating capacity; acquiring a first refrigerating capacity calculated value corresponding to a preset target load level, and outputting refrigerating power and cold water temperature corresponding to the preset target load level under the condition of the first refrigerating capacity calculated value according to an interpolation calculation result in the step S4 or the step S5; calculating and outputting an actual target power value corresponding to a preset target load level according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and by a method shown in a formula (5); based on a one-to-one correspondence between preset refrigerating capacity, refrigerating power, air conditioning energy efficiency ratio, cold water temperature and cold water flow, and according to an actual target power value and a specific cold water flow parameter, acquiring a plurality of refrigerating powers close to the actual target power value, a plurality of cold water flows close to the specific cold water flow parameter, and a plurality of refrigerating capacities, a plurality of cold water temperatures and a plurality of air conditioning energy efficiency ratios correspondingly. And carrying out interpolation calculation according to the actual target power value and the specific cold water flow parameter, and the obtained cold water temperatures, cold water flows, refrigerating capacities, refrigerating powers and air conditioner energy efficiency ratios, and obtaining and outputting the cold water temperatures, the refrigerating capacities and the air conditioner energy efficiency ratios corresponding to the target load levels preset under the condition of the actual target power value and the specific cold water flow parameter according to the calculation result. In one embodiment, the description of the specific implementation functions may be described with reference to steps S211 to S213.

The above air conditioner type selection system is used for executing the air conditioner type selection method embodiment shown in fig. 1, and the technical principles of the two are similar, the technical problems to be solved and the technical effects to be produced are similar, and those skilled in the art can clearly understand that, for convenience and brevity of description, the specific working process and the related description of the air conditioner type selection system can refer to the description of the air conditioner type selection method embodiment, and the description is omitted herein.

In a further embodiment of the invention, a storage device is also provided, in which storage device embodiment a plurality of program codes are stored, which program codes are adapted to be loaded and run by a processor to perform the method steps described in the air conditioner selection method embodiment described above.

In a further embodiment of the invention, a control device is also provided, in which embodiment the control device comprises a processor and a memory device adapted to store a plurality of program codes adapted to be loaded and executed by the processor to perform the method steps described in the foregoing air conditioner selection method embodiment. For convenience of description, only those parts related to the embodiments of the present specification are shown, and specific technical details are not disclosed, please refer to the method parts of the embodiments of the present specification. The control device may be a server device formed by various electronic devices, such as a PC computer, a network cloud server, or even a server function provided on any electronic device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant, a personal digital assistant), a desktop computer, and the like.

It will be appreciated by those skilled in the art that the present invention may implement all or part of the above-described methods according to the above-described embodiments, or may be implemented by means of a computer program for instructing relevant hardware, where the computer program may be stored in a computer readable storage medium, and where the computer program may implement the steps of the above-described embodiments of the method when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device, medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like capable of carrying the computer program code. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

Further, it should be understood that, since the respective modules are merely set for illustrating the functional units of the system of the present invention, the physical devices corresponding to the modules may be the processor itself, or a part of software in the processor, a part of hardware, or a part of a combination of software and hardware. Accordingly, the number of individual modules in the figures is merely illustrative.

Those skilled in the art will appreciate that the various modules in the system may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solution after splitting or combining falls within the protection scope of the present invention.

Thus far, the technical solution of the present invention has been described in connection with one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims

1. An air conditioner type selection method, which is characterized by comprising the following steps:

2. The air conditioner type selection method according to claim 1, further comprising:

3. The air conditioner type selection method according to claim 2, wherein when the air conditioner type selection input parameter includes a variable water temperature parameter, after step S4 or step S5, the method further comprises:

Wherein the T is _{n_calculation} Is the calculated value of the cold water temperature corresponding to the nth target load level, the T is _{m_computation} The load grade is a cold water temperature calculated value corresponding to a target load grade corresponding to the second load grade input value, and n=1, … m, …, N and N are load grades corresponding to full load; the d is a tolerance andthe T is _{N_computation} Is the calculated value of the cold water temperature corresponding to the full load, and the T is _{N_computation} The value of (2) depends on the cold water temperature input value, the T _{m_computation} Is dependent on the variable water temperature input value;

calculating a value T according to the cold water temperature _{n_calculation} Interpolation calculation is carried out on the specific cold water flow parameters, the obtained cold water temperatures, the obtained cold water flows, the obtained refrigerating capacities and the obtained refrigerating powers, and the calculated value T of the cold water temperature is obtained and output according to the calculation result _{n_calculation} The refrigerating capacity and the refrigerating power corresponding to the preset target load level under the condition of specific cold water flow parameters calculate the air conditioner energy efficiency ratio according to the refrigerating capacity and the refrigerating power corresponding to the preset target load level;

4. The air conditioner type selection method according to claim 2, wherein when the air conditioner type selection input parameter includes a target cooling capacity, after step S4 or step S5, the method further comprises:

Wherein said P' _{n_actual} Is the actual target power value, aThe P is _n And P _n-1 The nth target load level corresponds to the refrigerating power of n-1 target load levels, the T _n And T _n-1 The n-th target load level corresponds to the cold water temperature of n-1 target load levels, respectively, the k _t Is a preset correction coefficient, the K is _ΔC Is the cold quantity difference ratio andthe C' _n Is a second refrigerating capacity calculation value corresponding to the nth target load class, the C _n Is a first refrigerating capacity calculated value corresponding to the nth target load level, the C _n-1 Is the first calculated cooling capacity corresponding to the n-1 target load level.

5. An air conditioning profiling system, the system comprising:

6. The air conditioner type selection system according to claim 5, further comprising an air conditioner parameter calculation means configured to perform the operations of:

7. The air conditioner profiling system according to claim 6, further comprising: the air-conditioning parameter calculating means is configured to perform the following operations after step S4 or step S5 when the air-conditioning type-selection input parameter further includes a variable water temperature parameter:

wherein the T is _{n_calculation} Is the calculated value of the cold water temperature corresponding to the nth target load level, the cold water temperature is calculated by the methodT _{m_computation} The load grade is a cold water temperature calculated value corresponding to a target load grade corresponding to the second load grade input value, and n=1, … m, …, N and N are load grades corresponding to full load; the d is a tolerance andthe T is _{N_computation} Is the calculated value of the cold water temperature corresponding to the full load, and the T is _{N_computation} The value of (2) depends on the cold water temperature input value, the T _{m_computation} Is dependent on the variable water temperature input value;

8. The air conditioner profiling system according to claim 6, further comprising: the air-conditioning parameter calculation means is configured to perform the following operations after step S4 or step S5 when the air-conditioning type-selection input parameter further includes a target cooling capacity:

Wherein said P' _{n_actual} Is the actual target power value, the P _n And P _n-1 The nth target load level corresponds to the refrigerating power of n-1 target load levels, the T _n And T _n-1 The n-th target load level corresponds to the cold water temperature of n-1 target load levels, respectively, the k _t Is a preset correction coefficient, the K is _ΔC Is the cold quantity difference ratio andthe C' _n Is a second refrigerating capacity calculation value corresponding to the nth target load class, the C _n Is a first refrigerating capacity calculated value corresponding to the nth target load level, the C _n-1 Is the first calculated cooling capacity corresponding to the n-1 target load level.

9. A storage device having stored therein a plurality of program codes, wherein the program codes are adapted to be loaded and executed by a processor to perform the air conditioner selection method of any one of claims 1 to 4.

10. A control device comprising a processor and a storage device, the storage device being adapted to store a plurality of program codes, characterized in that the program codes are adapted to be loaded and executed by the processor to perform the air conditioner selection method of any one of claims 1 to 4.