CN110108006B

CN110108006B - Operation control method and device, air conditioner and readable storage medium

Info

Publication number: CN110108006B
Application number: CN201910379452.8A
Authority: CN
Inventors: 李仲珍; 许永锋; 李宏伟; 李洪生; 卢健洪; 马进; 张秋晨
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2021-04-02
Anticipated expiration: 2039-05-08
Also published as: CN110108006A

Abstract

The invention provides an operation control method, an operation control device, an air conditioner and a readable storage medium, wherein the operation control method comprises the following steps: respectively collecting the air inlet temperature and the air outlet temperature of an indoor unit of an air conditioner and the surface temperature of a heat exchanger; determining a current temperature characteristic proportion according to the inlet air temperature, the surface temperature of the heat exchanger and the outlet air temperature, wherein the current temperature characteristic proportion corresponds to the current heat exchange efficiency of the heat exchanger; determining whether to generate an adjusting parameter of the fan according to the relation between the current temperature characteristic proportion and a preset target temperature characteristic proportion, wherein the target temperature characteristic proportion corresponds to target heat exchange efficiency adaptive to target air volume; and if the adjusting parameters are generated, adjusting the rotating speed of the fan according to the adjusting parameters. According to the technical scheme of the invention, a calculation model in the control process is simplified, so that the implementation is more convenient, and the regulation of the rotating speed of the fan is correspondingly executed based on the acquired temperature value, so that the reliability is higher.

Description

Operation control method and device, air conditioner and readable storage medium

Technical Field

The present invention relates to the field of air conditioners, and in particular, to an operation control method, an operation control device, an air conditioner, and a computer-readable storage medium.

Background

Because the air volume is a key factor influencing the refrigeration or heating effect of an air conditioner system, if the air volume of the air outlet cannot be kept constant, the refrigeration or heating effect can be directly influenced, in the related technology, a sensor is adopted in the operation process of an indoor unit of the air conditioner to monitor the rotating speed of a fan, then the current air volume and static pressure are obtained according to a characteristic curve of the fan, and finally the rotating speed of a motor is reversely adjusted according to the required static pressure and air volume so as to realize the control output of the constant air volume, wherein the defects of the control method at present comprise:

(1) the control process is relatively complex;

(2) since the control accuracy of this scheme greatly depends on the accuracy of the static pressure sensor, the dependence on the static pressure sensor is relatively high.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, it is an object of the present invention to provide an operation control method.

Another object of the present invention is to provide an operation control device.

It is still another object of the present invention to provide an air conditioner.

It is yet another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, a technical solution of a first aspect of the present invention provides an operation control method, including: respectively collecting the air inlet temperature and the air outlet temperature of the indoor unit of the air conditioner and the surface temperature of the heat exchanger; determining a current temperature characteristic proportion according to the inlet air temperature, the surface temperature and the outlet air temperature, wherein the current temperature characteristic proportion corresponds to the current heat exchange efficiency of the heat exchanger; determining whether to generate an adjusting parameter of the fan according to the relation between the current temperature characteristic proportion and a preset target temperature characteristic proportion, wherein the target temperature characteristic proportion corresponds to target heat exchange efficiency adaptive to target air volume; and if the adjusting parameter is generated, adjusting the rotating speed of the fan according to the adjusting parameter so as to adjust the air outlet volume to the target air volume.

In the technical scheme, the real-time temperature characteristic proportion is calculated according to the temperature before heat exchange, the temperature after heat exchange and the surface temperature of the heat exchanger by collecting the temperatures of different positions on the flow path of the airflow, the temperature characteristic proportion can be specifically a specific value to express the heat exchange efficiency of the current heat exchanger, meanwhile, in order to realize the air outlet with constant air volume or the air outlet with nearly constant air volume, the target air volume needs to be preset, the corresponding target temperature characteristic proportion can be determined according to the target air volume, whether the current air volume is consistent with the target air volume or not is judged by comparing whether the real-time temperature characteristic proportion is matched with the target temperature characteristic proportion or not, and therefore when the real-time temperature characteristic proportion is inconsistent with the target air volume, and correspondingly generating an adjusting instruction of the rotating speed of the fan, wherein the adjusting instruction comprises an adjusting parameter so as to adjust the rotating speed of the fan based on the adjusting parameter, and finally achieving the purpose of controlling the air quantity close to the constant air quantity by realizing the air outlet based on the target air quantity.

Compared with the mode of collecting the motor rotating speed, determining the air volume and the static pressure by combining the characteristic curve of the fan and returning and adjusting the motor rotating speed based on the air volume and the static pressure, the method only needs to judge whether the fan rotating speed needs to be adjusted or not based on the temperature characteristic proportion obtained by calculating the temperature of a plurality of collected positions, on one hand, a calculation model in the control process is simplified, and therefore implementation is more convenient and faster, on the other hand, the static pressure value does not need to be determined or collected, and therefore a pressure sensor does not need to be arranged, the temperature collection mode based on the temperature sensor is taken as a mature technical means, and relatively higher reliability is achieved.

In addition, as can be understood by those skilled in the art, the temperature characteristic proportion is a ratio that represents heat exchange efficiency through a relative relationship among temperature values such as temperature before heat exchange, temperature after heat exchange, and surface temperature of the heat exchanger, and the ratio is positively correlated with the heat exchange efficiency of the heat exchanger and the air volume of the outlet air of the fan.

Specifically, the temperature sensors are arranged on the surfaces of the air return opening, the air outlet and the heat exchanger, so that the collecting function of multiple positions is realized.

Specifically, in the heating mode, the temperature of the return air inlet is usually lower than the temperature of the air outlet, and the temperature of the air outlet is lower than the surface temperature of the heat exchanger, and based on the relative relationship, the real-time temperature characteristic proportion defined in the application can be calculated.

In the cooling mode, the temperature of the return air inlet is usually higher than that of the air outlet, the temperature of the air outlet is higher than the surface temperature of the heat exchanger, and the real-time temperature characteristic proportion limited in the application can be calculated based on the relative relation.

In the above technical solution, preferably, the determining of the real-time temperature characteristic ratio according to the inlet air temperature, the surface temperature and the outlet air temperature specifically includes: determining the difference between the surface temperature and the average value of the ventilation as a first quantity to be compared; determining the difference between the air outlet temperature and the air inlet temperature as a second quantity to be compared; determining a ratio between the first quantity to be compared and the second quantity to be compared as the current temperature characteristic ratio, wherein the implementation process can be represented by a first calculation formula so as to calculate the real-time temperature characteristic ratio according to a first company:

calculating the real-time temperature characteristic ratio, wherein,

and in order to obtain the real-time temperature characteristic proportion, T1 is the inlet air temperature, TA is the outlet air temperature, and T2 is the surface temperature of the heat exchanger.

Wherein the content of the first and second substances,

the average temperature of the inlet and outlet air, namely the average value of the air change, is used for expressing,

the (first quantity to be compared) represents the actual heat exchange capacity of the evaporator, TA-T1 (second quantity to be compared) is a temperature difference value before and after heat exchange and is used for representing the actual heat exchange quantity, the ratio is used for representing the real-time temperature characteristic proportion, the calculated real-time temperature characteristic proportion and the target temperature characteristic proportion are used for executing matching operation, and whether the current air outlet quantity reaches the target air quantity or not is determined according to a matching result, namely whether the rotating speed of the fan needs to be further adjusted or not is determined.

In any one of the above technical solutions, preferably, before respectively collecting the inlet air temperature and the outlet air temperature of the indoor unit of the air conditioner and the surface temperature of the heat exchanger, the method further includes: determining a target heat exchange coefficient of the heat exchanger according to the target air volume; and determining the characteristic proportion of the target temperature according to the target air volume and the target heat exchange coefficient.

In the technical scheme, in order to determine the target temperature characteristic proportion, a target heat exchange coefficient corresponding to the target air volume needs to be calculated firstly, then the target air volume and the target heat exchange coefficient are further substituted into a preset calculation formula to calculate the corresponding target temperature characteristic proportion, the comparison with the real-time temperature characteristic proportion is combined to determine whether the rotating speed of the fan needs to be adjusted or not, whether the fan is matched or not is determined based on the comparison between the two temperature characteristic proportions, and the calculation process of the processor is facilitated to be simplified on the premise that the control reliability is ensured.

In any one of the above technical solutions, preferably, the determining the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes: and determining the target temperature characteristic proportion according to the target air volume, the target heat exchange coefficient, the air density, the air specific heat and the heat exchange area of the heat exchanger, wherein the air density, the air specific heat and the target temperature characteristic proportion are positively correlated, and the heat exchange area and the target temperature characteristic proportion are negatively correlated.

In any one of the above technical solutions, preferably, the calculating the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes: according to a second calculation formula:

calculating the target temperature characteristic ratio, wherein,

for the target temperature characteristic ratio, q_v2Is the target air volume, h is the target heat exchange coefficient, rho is the air density, C_PAnd B, the specific heat of air, and the heat exchange area of the heat exchanger A.

Specifically, as can be understood by those skilled in the art, the heat exchange amount for the indoor air conditioner has the following two calculation formulas:

Q＝q_v·ρ·C_P·(TA-T1) (3)

the two formulas are combined, and then:

in conjunction with the above definition of the temperature characteristic ratio, classifying the temperature value to one side of the equation and classifying other parameters to the other side of the equation, then:

in the formula (6), T^*At the current temperature characteristic ratio, q_v1Corresponding to the current air volume, if q is_vIs the target air quantity q_v2And then, a target temperature characteristic proportion can be calculated according to a right formula, namely the formula (2), so that when the real-time temperatures of a plurality of positions are collected, the real-time temperature characteristic proportion can be calculated according to a left equation, the target temperature characteristic proportion can be calculated according to the set target air volume and the corresponding heat exchange coefficient, and whether the fan rotating speed is adjusted or not is determined according to the relation between the real-time temperature characteristic proportion and the target temperature characteristic proportion, so that the aim of controlling the air volume close to the constant air volume is fulfilled.

In any one of the above technical solutions, preferably, the determining a target heat exchange coefficient of the heat exchanger according to the target air volume specifically includes: determining the structural parameters of the heat exchanger according to the structural type of the heat exchanger; and calculating the target heat exchange coefficient according to the structural parameters, the target air volume and the air physical property parameters.

In the technical scheme, because different heat exchangers have different structures, the difference also exists when the target heat exchange coefficient of the heat exchanger is determined, for example, the straight-line heat exchanger only has the tube row spacing in one direction, and the louvered heat exchanger comprises the longitudinal tube row spacing and the transverse tube row spacing, so different calculation formulas can be set according to the structure types of the different heat exchangers, and the different calculation formulas include the structural parameters corresponding to the structural characteristics and the air physical property parameters, so that the corresponding target heat exchange coefficient can be calculated according to the different calculation formulas, and the target temperature characteristic proportion is calculated by further combining with the preset target air volume.

Specifically, for a straight-line heat exchanger, the following formula can be used to calculate the target heat transfer coefficient.

For a louvered heat exchanger, the target heat transfer coefficient may be calculated using the following formula.

Wherein the content of the first and second substances,

h is the target heat transfer coefficient, q_vFor the target air volume, D_cIs the outer diameter of a heat exchange tube of the heat exchanger, v is the air viscosity, A is the heat exchange area of the heat exchanger, F_pIs the fin pitch of the heat exchanger, N is the number of tube rows of the heat exchanger, P_lIs the longitudinal tube row spacing of the heat exchanger, lambda is the air heat conductivity coefficient, P_tIs the transverse tube row spacing, P, of the heat exchanger_rAre prandtl numbers.

According to the calculation process, a static pressure value does not need to be acquired in the control process of adjusting the air volume to the target air volume, on one hand, real-time temperature characteristic proportions are determined based on measurement of a plurality of real-time temperatures, the target temperature characteristic proportions are determined based on identification of heat exchangers of different structural types and the target air volume, and a specific fan rotating speed adjusting strategy is determined based on comparison between the two temperature characteristic proportions, so that the aim of controlling constant air volume air outlet is achieved through adjustment of the fan rotating speed.

The derivation of the equations (7) to (9) is described in the literature "experimental study of Heat transfer and resistance characteristics of flat finned tube Heat exchangers" and "Heat and molar transfer for compact modified fins-and-tube Heat exchangers in wet conditions", respectively, and will not be described in detail in this application.

In any one of the above technical solutions, preferably, the determining whether to generate an adjustment parameter of the fan according to the relationship between the real-time temperature characteristic ratio and the target temperature characteristic ratio specifically includes: and if the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than a redundancy threshold value, generating an adjusting parameter of the fan.

In the technical scheme, in order to prevent frequent adjustment of the rotating speed of the fan, a redundancy threshold value can be set, so that when the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is less than or equal to the redundancy threshold value, can judge that the current air outlet volume reaches the target volume, at the moment, the adjustment of the rotating speed of the fan is not needed, and when the absolute difference between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than the redundancy threshold, indicating that the current real-time temperature characteristic proportion is not matched with the target temperature characteristic proportion, generating corresponding adjusting parameters, and adjusting the rotating speed of the fan according to the adjusting parameters to achieve the adaptation between the real-time temperature characteristic proportion and the target temperature characteristic proportion, the actual air outlet volume reaches the target air volume, and then the effect of constant air outlet can be improved, so that the use experience of a user is guaranteed.

In any one of the above technical solutions, preferably, if an absolute difference between the real-time temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, the generating an adjustment parameter of the fan specifically includes: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, controlling to increase the rotating speed of the fan.

In the technical scheme, on the premise that the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is larger than the redundancy threshold value, if the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, the actual heat exchange efficiency of the heat exchanger is shown to be lower than the target heat exchange efficiency at the moment, the actual air outlet air quantity is lower than the target air quantity from the air quantity perspective, the heat exchange efficiency is improved by increasing the rotating speed of the fan, the actual air outlet air quantity is increased to the target air quantity, and therefore the automatic control function of constant air outlet is achieved.

In any one of the above technical solutions, preferably, if an absolute difference between the real-time temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, the generating an adjustment parameter of the fan specifically includes: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is larger than the target temperature characteristic proportion, controlling to reduce the rotating speed of the fan.

In the technical scheme, on the premise that the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is larger than the redundancy threshold value, if the real-time temperature characteristic proportion is larger than the target temperature characteristic proportion, the actual heat exchange efficiency of the heat exchanger is shown to exceed the target heat exchange efficiency at the moment, the actual air outlet volume exceeds the target air volume from the air volume perspective, the reduction of the heat exchange efficiency is realized by reducing the rotating speed of the fan at the moment, so that the purpose of reducing the actual air outlet volume to the target air volume is achieved, and the automatic control function of constant air outlet is realized.

In addition, as can also be understood by those skilled in the art, since the operation control method for achieving the constant air volume output control in the heating mode can depend on only the temperature adjustment, the operation control method in the present application can achieve better effects when used in the heating mode compared to the cooling mode.

An aspect of the second aspect of the present invention provides an operation control device including: a memory and a processor, the memory configured to store the memory and to store program code, the processor configured to invoke the program code to perform: determining a real-time temperature characteristic proportion of the heat exchanger according to a plurality of position temperatures, wherein the plurality of position temperatures are real-time temperatures of a plurality of position points distributed on the indoor unit of the air conditioner along the airflow direction; determining whether to generate an adjusting parameter of the fan according to the relation between the real-time temperature characteristic proportion and a target temperature characteristic proportion, wherein the target temperature characteristic proportion is a temperature characteristic proportion corresponding to a target air volume; and if the adjusting parameter is generated, adjusting the rotating speed of the fan according to the adjusting parameter so as to adjust the air outlet volume to the target air volume for constant air outlet, wherein the heat exchange efficiency of the heat exchanger is represented by adopting a temperature characteristic proportion.

The technical personnel in the field can understand that the temperature characteristic proportion is a ratio which represents the heat exchange efficiency through the relative relation among temperature values such as the temperature before heat exchange, the temperature after heat exchange, the surface temperature of the heat exchanger and the like, the ratio is positively correlated with the heat exchange efficiency of the heat exchanger and the air volume of the air outlet of the fan, in order to calculate the real-time temperature characteristic proportion, the temperatures of a plurality of different positions need to take account of the air flow temperature before heat exchange, the air flow temperature after heat exchange and the surface temperature of the heat exchanger, and the purpose of calculating the real-time temperature characteristic proportion is achieved based on the temperature values.

In the foregoing technical solution, preferably, the processor is specifically configured to: respectively collecting the air inlet temperature of the indoor unit, the surface temperature of the heat exchanger and the air outlet temperature; and determining the real-time temperature characteristic proportion according to the inlet air temperature, the surface temperature and the outlet air temperature.

In this technical scheme, a plurality of position temperature include return air inlet temperature, air outlet temperature and the surface temperature of heat exchanger to realize the collection function of a plurality of positions through setting up temperature sensor at return air inlet, air outlet and heat exchanger surface.

According to the air inlet temperature, the surface temperature and the air outlet temperature, the real-time temperature characteristic proportion is determined, and the method specifically comprises the following steps: according to a first calculation formula:

calculating the real-time temperature characteristic ratio, wherein,

Wherein the content of the first and second substances,

the actual heat exchange capacity of the evaporator is represented, TA-T1 is a temperature difference value before and after heat exchange and is used for representing the actual heat exchange quantity, the ratio is used for representing a real-time temperature characteristic proportion, the calculated real-time temperature characteristic proportion and a target temperature characteristic proportion are used for executing matching operation, and whether the current air outlet quantity reaches the target air quantity or not is determined according to a matching result, namely whether the rotating speed of the fan needs to be further adjusted or not is determined.

In any one of the above technical solutions, preferably, the processor is specifically configured to: determining a target heat exchange coefficient of the heat exchanger according to the target air volume; and determining the characteristic proportion of the target temperature according to the target air volume and the target heat exchange coefficient.

In any one of the above technical solutions, preferably, the processor is specifically configured to: and determining the target temperature characteristic proportion according to the target air volume, the target heat exchange coefficient, the air density, the air specific heat and the heat exchange area of the heat exchanger, wherein the air density, the air specific heat and the target temperature characteristic proportion are positively correlated, and the heat exchange area and the target temperature characteristic proportion are negatively correlated.

calculating the target temperature characteristic ratio, wherein,

Q＝q_v·ρ·C_P·(TA-T1) (3)

the two formulas are combined, and then:

In any one of the above technical solutions, preferably, the processor is specifically configured to: determining the structural parameters of the heat exchanger according to the structural type of the heat exchanger; and calculating the target heat exchange coefficient according to the structural parameters, the target air volume and the air physical property parameters.

Wherein the content of the first and second substances,

h is the target heat transfer coefficient, q_vFor the target air volume, D_cIs the outer diameter of a heat exchange tube of the heat exchanger, v is the air viscosity, A is the heat exchange area of the heat exchanger, F_pIs the fin pitch of the heat exchanger, N is the number of tube rows of the heat exchanger, P_lIs the longitudinal tube row pitch, P, of the heat exchanger_tIs the transverse tube row spacing of the heat exchanger, lambda is the air heat conductivity coefficient, P_rAre prandtl numbers.

In any one of the above technical solutions, preferably, the processor is specifically configured to: and if the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than a redundancy threshold value, generating an adjusting parameter of the fan.

In any one of the above technical solutions, preferably, the processor is specifically configured to: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, controlling to increase the rotating speed of the fan.

In any one of the above technical solutions, preferably, the processor is specifically configured to: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is larger than the target temperature characteristic proportion, controlling to reduce the rotating speed of the fan.

An aspect of the third aspect of the present invention provides an air conditioner, including: the operation control device defined in any one of the above aspects.

An aspect of the fourth aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps defined in any one of the operation control methods described above.

According to the technical scheme, real-time temperatures acquired by temperature sensors arranged at different positions on an air duct in the indoor unit of the air conditioner are sorted and calculated to obtain a temperature characteristic proportion related to air volume of a heat exchanger of the indoor unit of the air conditioner, and a regulation strategy of the rotating speed of a fan is determined by combining the target temperature characteristic proportion corresponding to the target air volume so as to achieve the purpose of keeping the air volume of the air outlet of the indoor unit of the air conditioner constant.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;

fig. 2 is a schematic structural view showing an air conditioning indoor unit according to an embodiment of the present invention;

fig. 3 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A specific embodiment of the operation control scheme in the present application is described below with reference to fig. 1 and 2.

As shown in fig. 2, the operation control scheme in the present application may be applied to an indoor air conditioner 20 in a central air conditioning control system, a heat exchanger 202 and a fan (not shown) are disposed in the indoor air conditioner 20, and at least a first temperature sensor 204, a second temperature sensor 206 and a third temperature sensor 208 are disposed on the indoor air conditioner 20, where the first temperature sensor 204 is used for collecting an intake air temperature T1, the second temperature sensor 206 is used for collecting a pipe temperature T2 of the heat exchanger, and the third temperature sensor 208 is used for collecting an outlet air temperature TA.

As shown in fig. 1, an operation control method according to an embodiment of the present invention includes:

step 102, respectively collecting the air inlet temperature and the air outlet temperature of the indoor unit of the air conditioner and the surface temperature of the heat exchanger;

104, determining a current temperature characteristic proportion according to the inlet air temperature, the surface temperature and the outlet air temperature, wherein the current temperature characteristic proportion corresponds to the current heat exchange efficiency of the heat exchanger;

step 106, determining whether to generate an adjusting parameter of the fan according to the relation between the current temperature characteristic proportion and a preset target temperature characteristic proportion, wherein the target temperature characteristic proportion corresponds to target heat exchange efficiency adaptive to target air volume;

and 108, if the adjusting parameters are generated, adjusting the rotating speed of the fan according to the adjusting parameters so as to adjust the air outlet volume to the target air volume.

In the embodiment, the real-time temperature characteristic proportion is calculated according to the temperature before heat exchange, the temperature after heat exchange and the surface temperature of the heat exchanger by collecting the temperatures of different positions on the flow path of the airflow, the temperature characteristic proportion can be specifically a ratio to represent the heat exchange efficiency of the current heat exchanger, meanwhile, in order to realize the air outlet with constant air volume or the air outlet with nearly constant air volume, the target air volume needs to be preset, the corresponding target temperature characteristic proportion can be determined according to the target air volume, whether the current air volume is consistent with the target air volume or not is judged by comparing whether the real-time temperature characteristic proportion is matched with the target temperature characteristic proportion or not, and therefore when the real-time temperature characteristic proportion is inconsistent with the target air volume, and correspondingly generating an adjusting instruction of the rotating speed of the fan, wherein the adjusting instruction comprises an adjusting parameter so as to adjust the rotating speed of the fan based on the adjusting parameter, and finally achieving the purpose of controlling the air quantity close to the constant air quantity by realizing the air outlet based on the target air quantity.

As shown in fig. 2, specifically, temperature sensors are disposed on the surfaces of the return air inlet, the air outlet and the heat exchanger to realize the collecting function at multiple positions.

In the above embodiment, preferably, the determining the real-time temperature characteristic ratio according to the inlet air temperature, the surface temperature, and the outlet air temperature specifically includes: determining the difference between the surface temperature and the average value of the ventilation as a first quantity to be compared; determining the difference between the air outlet temperature and the air inlet temperature as a second quantity to be compared; determining a ratio between the first quantity to be compared and the second quantity to be compared as the current temperature characteristic ratio, wherein the implementation process can be represented by a first calculation formula so as to calculate the real-time temperature characteristic ratio according to a first company:

calculating the real-time temperature characteristic ratio, wherein,

and the real-time temperature characteristic proportion is obtained.

Wherein the content of the first and second substances,

the actual heat exchange capacity of the evaporator is represented, TA-T1 is a temperature difference value before and after heat exchange and is used for representing the actual heat exchange quantity, and the ratio is used for representing the real-time temperature characteristic proportionAnd executing matching operation by adopting the calculated real-time temperature characteristic proportion and the target temperature characteristic proportion, and determining whether the current air outlet volume reaches the target air volume or not according to a matching result, namely whether the rotating speed of the fan needs to be further adjusted or not.

In any one of the above embodiments, preferably, before the respectively collecting the inlet air temperature and the outlet air temperature of the indoor unit of the air conditioner and the surface temperature of the heat exchanger, the method further includes: determining a target heat exchange coefficient of the heat exchanger according to the target air volume; and determining the characteristic proportion of the target temperature according to the target air volume and the target heat exchange coefficient.

In this embodiment, in order to determine the target temperature characteristic ratio, a target heat exchange coefficient corresponding to the target air volume needs to be calculated first, then the target air volume and the target heat exchange coefficient are further substituted into a preset calculation formula to obtain the corresponding target temperature characteristic ratio through calculation, the target air volume and the target heat exchange coefficient are compared with the real-time temperature characteristic ratio to determine whether the rotation speed of the fan needs to be adjusted, whether the fan is matched is determined based on the comparison between the two temperature characteristic ratios, and on the premise that the control reliability is ensured, the calculation process of the processor is facilitated to be simplified.

In any one of the foregoing embodiments, preferably, the determining the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes: and determining the target temperature characteristic proportion according to the target air volume, the target heat exchange coefficient, the air density, the air specific heat and the heat exchange area of the heat exchanger, wherein the air density, the air specific heat and the target temperature characteristic proportion are positively correlated, and the heat exchange area and the target temperature characteristic proportion are negatively correlated.

In any one of the foregoing embodiments, preferably, the calculating the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes: calculating the target temperature characteristic proportion according to a second calculation formula, wherein the second calculation formula is as follows:

wherein the content of the first and second substances,

is the target temperature characteristic proportion.

Specifically, as can be understood by those skilled in the art, the heat exchange amount Q for the indoor air conditioner has the following two calculation formulas:

Q＝Q_v·ρ·C_P·(TA-T1) (3)

and (3) combining the two formulas to obtain a formula (5):

combining the above limitation on the temperature characteristic ratio, classifying the temperature value to one side of the equation, and classifying other parameters to the other side of the equation to obtain the temperature characteristic ratio T^*Calculation formula (6):

in the formula (6), T^*At the current temperature characteristic ratio, q_v1Corresponding to the current air volume, if q is_vIs the target air quantity q_v2And calculating a target temperature characteristic proportion according to a right formula, namely the formula (2), when the real-time temperatures of a plurality of positions are acquired, calculating the real-time temperature characteristic proportion according to a left equation, calculating the target temperature characteristic proportion according to the set target air volume and the corresponding heat exchange coefficient, and determining whether to adjust the rotating speed of the fan according to the relation between the real-time temperature characteristic proportion and the target temperature characteristic proportion so as to achieve the aim of controlling the air volume close to the constant air volume.

In any one of the foregoing embodiments, preferably, the determining a target heat exchange coefficient of the heat exchanger according to the target air volume specifically includes: determining the structural parameters of the heat exchanger according to the structural type of the heat exchanger; and calculating the target heat exchange coefficient according to the structural parameters, the target air volume and the air physical property parameters.

In this embodiment, because different heat exchangers have different structures, there is a difference in determining a target heat exchange coefficient of the heat exchanger, for example, the inline heat exchanger has a tube row pitch in only one direction, and the louver heat exchanger includes a longitudinal tube row pitch and a transverse tube row pitch, so different calculation formulas can be set for different structure types of the heat exchanger, and the different calculation formulas include air physical property parameters in addition to the structural parameters corresponding to the structural characteristics, so that the corresponding target heat exchange coefficient can be calculated according to the different calculation formulas, and further the target temperature characteristic ratio is calculated by combining with a preset target air volume.

The meanings of the symbols in calculation formulas (1) to (9) are shown in table 1.

TABLE 1

Symbol	Means of
		T1	Inlet air temperature of indoor unit
TA	Air outlet temperature of indoor unit
		T2	Middle temperature of indoor heat exchanger
Q	Heat exchange amount of indoor unit
		q_V	Air outlet volume of indoor unit
ρ	Density of air
		C_P	Specific heat of air
v	Viscosity of air
		λ	Coefficient of heat conductivity of air
h	Heat transfer coefficient of air side of heat exchanger
		A	Heat exchange area of air side of heat exchanger
F_p	Fin pitch
		D_c	Heat exchange tube external diameter of heat exchanger
N	Number of rows of tubes
		P_l	Longitudinal tube row spacing
P_t	Transverse tube row spacing
		L_p	Length of shutter projection
P_r	Prandtl number

In any one of the above embodiments, preferably, the determining whether to generate an adjustment parameter of the fan according to the relationship between the real-time temperature characteristic ratio and the target temperature characteristic ratio specifically includes: and if the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than a redundancy threshold value, generating an adjusting parameter of the fan.

In this embodiment, to prevent frequent adjustment of the fan speed, a redundancy threshold may be set such that when the absolute difference between the real-time temperature characteristic ratio and the target temperature characteristic ratio is less than or equal to the redundancy threshold, can judge that the current air outlet volume reaches the target volume, at the moment, the adjustment of the rotating speed of the fan is not needed, and when the absolute difference between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than the redundancy threshold, indicating that the current real-time temperature characteristic proportion is not matched with the target temperature characteristic proportion, generating corresponding adjusting parameters, and adjusting the rotating speed of the fan according to the adjusting parameters to achieve the adaptation between the real-time temperature characteristic proportion and the target temperature characteristic proportion, the actual air outlet volume reaches the target air volume, and then the effect of constant air outlet can be improved, so that the use experience of a user is guaranteed.

In any one of the foregoing embodiments, preferably, if the absolute difference between the real-time temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, the generating an adjustment parameter of the fan specifically includes: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, controlling to increase the rotating speed of the fan.

In this embodiment, on the premise that the absolute difference between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than the redundancy threshold, if the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, it indicates that the actual heat exchange efficiency of the heat exchanger does not reach the target heat exchange efficiency, and from the air volume perspective, that is, the actual air volume does not reach the target air volume, the improvement of the heat exchange efficiency is realized by increasing the rotation speed of the fan, so as to achieve the purpose of increasing the actual air volume to the target air volume, thereby realizing the automatic control function of constant air outlet.

In any one of the foregoing embodiments, preferably, if the absolute difference between the real-time temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, the generating an adjustment parameter of the fan specifically includes: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is larger than the target temperature characteristic proportion, controlling to reduce the rotating speed of the fan.

In this embodiment, on the premise that the absolute difference between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than the redundancy threshold, if the real-time temperature characteristic proportion is greater than the target temperature characteristic proportion, it indicates that the actual heat exchange efficiency of the heat exchanger exceeds the target heat exchange efficiency, and from the air volume perspective, that is, the actual air volume exceeds the target air volume, the reduction of the heat exchange efficiency is realized by reducing the rotation speed of the fan, so as to achieve the purpose of reducing the actual air volume to the target air volume, thereby realizing the automatic control function of constant air outlet.

As shown in fig. 3, the operation control device 300 according to the embodiment of the present invention includes: a memory 304 and a processor 302, the memory 304 for storing program code, the processor 302 for invoking the program code to perform: determining a real-time temperature characteristic proportion of the heat exchanger according to a plurality of position temperatures, wherein the plurality of position temperatures are real-time temperatures of a plurality of position points distributed on the indoor unit of the air conditioner along the airflow direction; determining whether to generate an adjusting parameter of the fan according to the relation between the real-time temperature characteristic proportion and a target temperature characteristic proportion, wherein the target temperature characteristic proportion is a temperature characteristic proportion corresponding to a target air volume; and if the adjusting parameter is generated, adjusting the rotating speed of the fan according to the adjusting parameter so as to adjust the air outlet volume to the target air volume for constant air outlet, wherein the heat exchange efficiency of the heat exchanger is represented by adopting a temperature characteristic proportion.

In the foregoing embodiment, preferably, the processor 302 is specifically configured to: respectively collecting the air inlet temperature of the indoor unit, the surface temperature of the heat exchanger and the air outlet temperature; and determining the real-time temperature characteristic proportion according to the inlet air temperature, the surface temperature and the outlet air temperature.

In this embodiment, the temperature of the plurality of positions includes the temperature of the return air inlet, the temperature of the air outlet and the surface temperature of the heat exchanger, and the temperature sensors are arranged on the surfaces of the return air inlet, the air outlet and the heat exchanger to realize the acquisition function of the plurality of positions.

As shown in fig. 3, the operation control device 300 further includes: the temperature control system comprises a first temperature sensor 204, a second temperature sensor 206 and a third temperature sensor 208, wherein the first temperature sensor 204 is used for collecting the inlet air temperature T1, the second temperature sensor 206 is used for collecting the tube temperature T2 of the heat exchanger, and the third temperature sensor 208 is used for collecting the outlet air temperature TA.

calculating the real-time temperature characteristic ratio, wherein,

Wherein the content of the first and second substances,

In any of the above embodiments, preferably, the processor 302 is specifically configured to: determining a target heat exchange coefficient of the heat exchanger according to the target air volume; and determining the characteristic proportion of the target temperature according to the target air volume and the target heat exchange coefficient.

In this embodiment, in order to determine the target temperature characteristic ratio, a target heat exchange coefficient corresponding to the target air volume needs to be calculated first, then the target air volume and the target heat exchange coefficient are further substituted into a preset calculation formula to obtain the corresponding target temperature characteristic ratio, the target air volume and the target heat exchange coefficient are compared with the real-time temperature characteristic ratio to determine whether the rotation speed of the fan needs to be adjusted, and whether the target air volume and the target heat exchange coefficient match is determined based on the comparison between the two temperature characteristic ratios.

In any of the above embodiments, preferably, the processor 302 is specifically configured to: and determining the target temperature characteristic proportion according to the target air volume, the target heat exchange coefficient, the air density, the air specific heat and the heat exchange area of the heat exchanger, wherein the air density, the air specific heat and the target temperature characteristic proportion are positively correlated, and the heat exchange area and the target temperature characteristic proportion are negatively correlated.

In any one of the foregoing embodiments, preferably, the calculating the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes: according to a second calculation formula:

calculating the target temperature characteristic ratio, wherein,

Q＝q_v·ρ·C_P·(TA-T1) (3)

the two formulas are combined, and then:

In any of the above embodiments, preferably, the processor 302 is specifically configured to: determining the structural parameters of the heat exchanger according to the structural type of the heat exchanger; and calculating the target heat exchange coefficient according to the structural parameters, the target air volume and the air physical property parameters.

Wherein the content of the first and second substances,

In any of the above embodiments, preferably, the processor 302 is specifically configured to: and if the absolute difference value between the real-time temperature characteristic proportion and the target temperature characteristic proportion is greater than a redundancy threshold value, generating an adjusting parameter of the fan.

In any of the above embodiments, preferably, the processor 302 is specifically configured to: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is smaller than the target temperature characteristic proportion, controlling to increase the rotating speed of the fan.

In any of the above embodiments, preferably, the processor 302 is specifically configured to: and if the absolute difference is larger than the redundancy threshold value and the real-time temperature characteristic proportion is larger than the target temperature characteristic proportion, controlling to reduce the rotating speed of the fan.

An air conditioner according to an embodiment of the present invention includes the operation control device 300 according to any one of the above embodiments.

A schematic configuration of an air conditioner according to an embodiment of the present invention is shown in fig. 2.

A computer-readable storage medium according to an embodiment of the invention, on which a computer program is stored which, when being executed by a processor, realizes the steps defined in any one of the above-mentioned control methods.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An operation control method is suitable for an air conditioner indoor unit, a heat exchanger and a fan are arranged in the air conditioner indoor unit, and the operation control method is characterized by comprising the following steps:

respectively collecting the air inlet temperature and the air outlet temperature of the indoor unit of the air conditioner and the surface temperature of the heat exchanger;

determining a current temperature characteristic proportion according to the inlet air temperature, the surface temperature and the outlet air temperature, wherein the current temperature characteristic proportion corresponds to the current heat exchange efficiency of the heat exchanger;

determining whether to generate an adjusting parameter of the fan according to the relation between the current temperature characteristic proportion and a preset target temperature characteristic proportion, wherein the target temperature characteristic proportion corresponds to target heat exchange efficiency adaptive to target air volume;

if the adjusting parameter is generated, adjusting the rotating speed of the fan according to the adjusting parameter so as to adjust the air outlet volume to the target air volume;

according to the air inlet temperature, surface temperature with the air-out temperature confirms current temperature characteristic ratio, specifically includes:

determining the average value of the inlet air temperature and the outlet air temperature as an air exchange average value;

determining the difference between the surface temperature and the average value of the ventilation as a first quantity to be compared;

determining the difference between the air outlet temperature and the air inlet temperature as a second quantity to be compared;

determining the ratio of the first quantity to be compared to the second quantity to be compared as the current temperature characteristic proportion;

gather respectively the air inlet temperature and the air-out temperature of air conditioning indoor set, and before the surface temperature of heat exchanger, still include:

determining a target heat exchange coefficient of the heat exchanger according to the target air volume;

and determining the characteristic proportion of the target temperature according to the target air volume and the target heat exchange coefficient.

2. The operation control method according to claim 1, wherein the determining a target heat exchange coefficient of the heat exchanger according to the target air volume specifically comprises:

determining the structural parameters of the heat exchanger according to the structural type of the heat exchanger;

and determining the target heat exchange coefficient according to the structural parameters, the target air volume and the air physical property parameters.

3. The operation control method according to claim 2, wherein the determining the target temperature characteristic ratio according to the target air volume and the target heat exchange coefficient specifically includes:

determining the target temperature characteristic proportion according to the target air volume, the target heat exchange coefficient, the air density, the air specific heat and the heat exchange area of the heat exchanger,

wherein the air density and the air specific heat are positively correlated with the target temperature characteristic proportion, and the heat exchange area is negatively correlated with the target temperature characteristic proportion.

4. The operation control method according to any one of claims 1 to 3, wherein the determining whether to generate the adjustment parameter of the fan according to the relationship between the current temperature characteristic ratio and the target temperature characteristic ratio specifically includes:

and if the absolute difference value between the current temperature characteristic proportion and the target temperature characteristic proportion is greater than a redundancy threshold value, generating an adjusting parameter of the fan.

5. The operation control method according to claim 4, wherein if the absolute difference between the current temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, generating an adjustment parameter of the fan specifically comprises:

and if the absolute difference is larger than the redundancy threshold value and the current temperature characteristic proportion is smaller than the target temperature characteristic proportion, controlling to increase the rotating speed of the fan.

6. The operation control method according to claim 5, wherein if the absolute difference between the current temperature characteristic ratio and the target temperature characteristic ratio is greater than a redundancy threshold, generating an adjustment parameter of the fan specifically comprises:

and if the absolute difference is larger than the redundancy threshold value and the current temperature characteristic proportion is larger than the target temperature characteristic proportion, controlling to reduce the rotating speed of the fan.

7. The utility model provides an operation control device, is applicable to the machine in the air conditioning, be provided with heat exchanger and fan in the machine in the air conditioning, its characterized in that, operation control device includes: a memory for storing program code and a processor for calling the program code to perform the operation control method according to any one of claims 1 to 6.

8. An air conditioner, comprising:

the operation control device according to claim 7.

9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps defined in the execution control method according to any one of claims 1 to 6.