All-weather self-adaptive energy-saving control method and air conditioning cabinet

Abstract

The invention is suitable for the technical field of air conditioner control, and provides an all-weather self-adaptive energy-saving control method and an air handling unit. The method comprises the following steps: calculating a primary coil outlet air temperature Tc1 and a primary return air ratio alpha; if Tc1gt; if Tcw + 3.5, Psi (0) and Psi (1) are calculated; if the psi (0) and the psi (1) are different, corresponding adjustment is carried out; if the psi (0) and the psi (1) are the same in size and are smaller than 0 at the same time, corresponding adjustment is conducted; if Tc1 is smaller than or equal to Tcw + 3.5, corresponding adjustment is carried out; and the primary coil pipe air outlet temperature Tc1 and the primary air return ratio alpha are recalculated. According to the method, the most energy-saving secondary air return ratio can be calculated in real time, the cold / wet load of the clean room system can be calculated, so that the actual air supply state point is obtained, a traditional secondary air return air conditioning box is more intelligent, the secondary air return ratio can be intelligently adjusted according to the indoor cold / wet load and the outdoor climate condition, and the air conditioning box is in the optimal energy-saving state.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air conditioner control technology, and particularly relates to an all-weather adaptive energy-saving control method and an air conditioner box. BACKGROUND

[0002] The cold and heat consumption accounts for a large proportion in the operation cost of the purification combined air conditioner box used in the medical clean workshop. Under the premise of meeting the indoor temperature and humidity requirements of drug production, reducing the cold and heat consumption in the air treatment process can greatly reduce the operation cost.

[0003] The traditional primary return air treatment process is as follows: in summer and transition seasons, the fresh air and return air are mixed first, cooled to the dew point temperature through the cooling section, dehumidified, heated to the supply air temperature through the heating section, and then sent to the clean room.

[0004] In addition to the effective refrigeration capacity, the rest of the cold capacity and the heat consumed in the reheating process of the primary return air air conditioner box are offset, resulting in energy waste.

[0005] The secondary return air system is a way of mixing indoor return air twice. Under the premise of realizing indoor temperature and humidity control, the reheating link is replaced by secondary mixing to achieve energy-saving effect. However, the traditional secondary return air system designs the return air volume for both return air sections, but in actual application, the control effect is often poor, and the reasons include: (1) Uncertainty of the supply air state point: the supply air state point is artificially given and may not be the actual reasonable supply air state point. For example, the diurnal temperature difference is large, and there is a large moisture source in the clean room, which will cause the supply air state point to move, resulting in the change of the secondary return air ratio calculated value, and the electric regulating valve or hand valve arranged in the AHU return air pipe cannot realize the function of real-time adjustment of the secondary return air ratio; (2) Difficulty in calculating the post-treatment temperature of the primary cold coil: the state point after the primary mixed air is treated by the cold coil needs to rely on the enthalpy humidity diagram and auxiliary line drawing method, and there is no mathematical model. For the complex selection process of AHU and the variable environment, it is not convenient to calculate in real time through the auxiliary line drawing method of the enthalpy humidity diagram, and it is impossible to realize real-time adjustment in the automatic control system. SUMMARY

[0006] The purpose of the embodiment of the present application is to provide an all-weather adaptive energy-saving control method and an air conditioner box, which aims to solve the technical problems existing in the prior art mentioned in the background.

[0007] The embodiment of the present application is implemented as follows: An all-weather adaptive energy-saving control method, which specifically comprises the following steps: Receiving the input initial data, collecting the sensing monitoring data, calculating the primary coil outflow temperature Tc1 and the primary return air ratio a, and comparing the primary coil outflow temperature Tc1 with the primary coil water supply temperature Tcw; If Tc1>Tcw+3.5, then calculate Ψ(0) and Ψ(1), and judge whether Ψ(0) and Ψ(1) are of different signs; If Ψ(0) and Ψ(1) are of different signs, then adjust the opening of the primary return air variable air volume valve according to the primary return air ratio a, and adjust the opening of the energy valve according to the primary coil outflow temperature Tc1; If Ψ(0) and Ψ(1) are of the same sign and are less than 0 at the same time, then adjust the opening of the primary return air variable air volume valve so that the primary return air ratio a=0, and calculate the corresponding primary coil outflow temperature Tc1 to adjust the opening of the energy valve; If Tc1≤Tcw+3.5, then set the primary coil outflow temperature as Tcw+3.5, calculate the a* required for cleaning the wet, adjust the opening of the primary return air variable air volume valve, and adjust the opening of the energy valve so that the primary coil outflow temperature reaches Tcw+3.5; The primary return air and the secondary return air are mixed, the temperature is adjusted to the supply air state point by the reheating coil, the actual cold load and the actual wet load in the room are calculated, the latest supply air state point is calculated, the primary coil outflow temperature Tc1 and the primary return air ratio a are recalculated.

[0008] As a further limitation of the technical scheme of the embodiment of the application, the calculation formula of the primary coil outflow temperature Tc1 and the primary return air ratio a is: ; ; ; Wherein, is the humidity content function corresponding to the primary coil outflow temperature; is the total humidity function of the primary mixed air after passing through the primary cold coil; is the total mass flow of the primary mixed air; is the humidity content of the secondary mixed air; is the fresh air ratio; is the humidity content of the return air; is the rational function about the primary return air ratio, which is the humidity content of the primary mixed air after passing through the primary cold coil when cleaning the wet; is the specific enthalpy function corresponding to the primary coil outflow temperature; is the total energy function of the primary mixed air after passing through the primary cold coil; is the specific enthalpy of the secondary mixed air; is the specific enthalpy of the return air; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed;

[0009] Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed;

[0010] Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed;

[0011] Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed; Ψ(0) is a rational function of the primary return air ratio, and is the specific enthalpy of the primary mixed air after passing through the primary cooling coil when the clean energy is removed;

[0012] As a further limitation of the technical scheme of the embodiment of the present application, the opening of the primary return air variable air volume valve is adjusted so that the primary return air ratio a = 0, and the primary coil outlet air temperature Tc1 corresponding to the primary return air ratio a = 0 is calculated, and the energy valve opening is adjusted specifically comprising the following steps: determining that the air conditioning box must be reheated; adjusting the opening of the primary return air variable air volume valve so that the primary return air ratio a = 0; calculating the primary coil outlet air temperature Tc1 when the primary return air ratio a = 0; adjusting the energy valve opening according to the primary coil outlet air temperature Tc1 when the primary return air ratio a = 0.

[0013] As a further limitation of the technical scheme of the embodiment of the present application, the primary coil outlet air temperature is set to Tcw+3.5, a* required to remove clean wetness is calculated, the opening of the primary return air variable air volume valve is adjusted, and the energy valve opening is adjusted so that the primary coil outlet air temperature reaches Tcw+3.5 specifically comprising the following steps: determining that the primary cold coil is not enough to treat the air to Tc1 at this time; setting the primary coil outlet air temperature to Tcw+3.5; calculating a* required to remove clean wetness; adjusting the opening of the primary return air variable air volume valve so that the primary return air ratio is adjusted to a*; adjusting the energy valve opening so that the primary coil outlet air temperature reaches Tcw+3.5.

[0014] As a further limitation of the technical scheme of the embodiment of the present application, the primary return air and the secondary return air are mixed, the temperature is adjusted to the supply air state point by the reheating coil, the actual cold load and the actual wet load in the room are calculated, the latest supply air state point is calculated, and the primary coil outlet air temperature Tc1 and the primary return air ratio a are recalculated specifically comprising the following steps: mixing the primary return air treated by the primary cold coil and the secondary return air, and adjusting the temperature to the supply air state point by the reheating coil; calculating the actual cold load and the actual wet load in the room according to the sensing monitoring data; calculating the latest supply air state point according to the actual cold load in the room and the actual wet load; recalculating the primary coil outlet air temperature Tc1 and the primary return air ratio a according to the latest supply air state point.

[0015] A full-time self-adaptive energy-saving air conditioning box, the full-time self-adaptive energy-saving air conditioning box stores a computer program, and the computer program is executed by a processor to make the processor execute the steps of the full-time self-adaptive energy-saving control method.

[0016] Compared with the prior art, the application has the beneficial effects of: (1) The application is more intelligent than the traditional secondary return air conditioning box by being equipped with corresponding sensors and actuators and combining scientific and reasonable algorithms, and can intelligently adjust the secondary return air ratio according to the indoor cold and wet loads and the outdoor climate conditions, so that the air conditioning box is in the best energy-saving state. (2) The application realizes mathematical modeling of the enthalpy-humidity chart, accurately calculates the best energy-saving point in a digital way, and can be adjusted in real time, greatly enhances the immediacy, can calculate the most energy-saving secondary return air ratio in real time, and can calculate the cold / wet load of the clean room system, so as to obtain the actual supply air state point. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A system diagram of a traditional primary return air treatment provided by the embodiment of the application is shown; Figure 2 A flow chart of the all-weather self-adaptive energy-saving control method provided by the embodiment of the application is shown; Figure 3 A system diagram of the all-weather self-adaptive energy-saving air conditioning box provided by the embodiment of the application is shown. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the application clearer and more apparent, the application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0019] It can be understood that, as Figure 1The system diagram of the traditional primary return air treatment provided by the embodiment of the application is shown, and the traditional primary return air treatment process is as follows: in summer and transition seasons, fresh air and return air are mixed first, are cooled to the dew point temperature through the cooling section, are dehumidified, are heated to the supply air temperature through the heating section, and are sent to the clean room. In addition to the effective refrigeration capacity, the rest of the cold capacity of the air conditioning box of the primary return air is offset by the heat consumed in the reheating process, resulting in energy waste. The secondary return air system is a way of mixing indoor return air twice, and realizes energy saving by replacing the reheating link through secondary mixing under the premise of realizing indoor temperature and humidity control. However, the traditional secondary return air system designs the return air volume for both return air sections, but in actual application, the control effect is often poor, and the reasons include: (1) uncertainty of the supply air state point: the supply air state point is artificially given, and is not necessarily the actual reasonable supply air state point. For example, the large diurnal temperature difference and the sudden large moisture source in the clean room will cause the supply air state point to move, so that the secondary return air ratio deviates from the calculated value, and the electric regulating valve or hand valve arranged in the AHU return air pipe cannot realize the function of real-time adjustment of the secondary return air ratio; (2) difficulty in calculating the temperature after the treatment of the primary cooling coil: the state point after the treatment of the primary mixed air through the cooling coil needs to be found by relying on the psychrometric chart and the auxiliary line, and there is no mathematical model. For the complex AHU selection process and the variable environment, it is inconvenient to calculate in real time by drawing the auxiliary line on the psychrometric chart, and it is impossible to realize real-time adjustment in the automatic control system.

[0020] To solve the above problems, the all-weather adaptive energy-saving control method and air conditioning box provided by the embodiment of the application receives input initialization data, collects sensing monitoring data, calculates primary coil outlet air temperature Tc1 and primary return air ratio a, and compares the primary coil outlet air temperature Tc1 with primary coil water supply temperature Tcw.

[0021] Specifically, Figure 2 The flow chart of the all-weather adaptive energy-saving control method provided by the embodiment of the application is shown.

[0022] In one preferred embodiment provided by the application, an all-weather adaptive energy-saving control method specifically comprises the following steps: Step one, receive input initialization data, collect sensing monitoring data, calculate primary coil outlet air temperature Tc1 and primary return air ratio a, and compare the primary coil outlet air temperature Tc1 with primary coil water supply temperature Tcw.

[0023] In the embodiment of the application, the input initialization data is received, the sensing monitoring data is collected, the initialization data is substituted, and the primary coil outlet air temperature Tc1 and the primary return air ratio a are iteratively calculated. The primary coil outlet air temperature Tc1 is compared with the primary coil water supply temperature Tcw. Specifically, the calculation formula of the primary coil outlet air temperature Tc1 and the primary return air ratio a is as follows: ; ; ; wherein, is the humidity ratio function corresponding to the primary coil outlet air temperature; is the total humidity ratio function of the primary air mixture after passing through the primary cooling coil; is the total mass flow of the primary air mixture; is the humidity ratio of the secondary air mixture; is the fresh air ratio; is the humidity ratio of the return air; is the rational function of the primary return air ratio, which is the humidity ratio of the primary air mixture after passing through the primary cooling coil except for clean humidity; is the specific enthalpy function corresponding to the primary coil outlet air temperature; is the total energy function of the primary air mixture after passing through the primary cooling coil; is the specific enthalpy of the secondary air mixture; is the specific enthalpy of the return air; is the rational function of the primary return air ratio, which is the specific enthalpy of the primary air mixture after passing through the primary cooling coil except for clean energy; is the iterative calculation formula for solving the primary return air ratio α, which is obtained from function; i.e., when the primary coil outlet air temperature is , the clean humidity removal state is reached, and then is substituted into function to verify whether is equal to , and the iterative calculation is performed until the unique value of the primary return air ratio α is obtained, so that i.e., the clean humidity removal and clean energy removal state is reached.

[0024] It can be understood that the initialization data includes atmospheric pressure B, fresh air ratio F, total supply air volume Vs, indoor humidity load w, supply air set temperature Tss, return air set temperature Th, return air set relative humidity RHh, and default values, wherein the default values include: supply air set temperature = return air set temperature minus 4℃, indoor humidity load 0.3g / kg dry air; sensor monitoring data includes: fresh air temperature To, fresh air relative humidity RHo, supply air temperature Ts, supply air relative humidity RHs, return air temperature Tr, return air relative humidity RHr, primary cooling coil water supply temperature Tcw, total return air volume Vr measured by the return air main pipe variable air volume valve, and primary return air volume Vr1 measured by the primary return air pipe variable air volume valve.

[0025] Step two, if Tc1>Tcw+3.5, then calculate Ψ(0) and Ψ(1), and determine whether Ψ(0) and Ψ(1) are of different signs.

[0026] In the embodiment of the present application, the value of the primary coil outflow temperature Tc1 is compared with the value of the primary coil water supply temperature Tcw, and in the case of Tc1>Tcw+3.5, it is determined that the primary cooling coil can treat the air to Tc1, and the primary coil outflow temperature Tc1 is obtained by solving the primary coil outflow temperature , and obtaining , solving the primary coil outflow temperature , obtaining If Ψ(0) and Ψ(1) are of different signs, there is a point at which the air conditioning box can completely eliminate reheating, i.e. the optimal energy-saving point; if and are both less than 0, reheating is unavoidable, and specifically, the calculation formulae of Ψ(0) and Ψ(1) are as follows: ; wherein, is the difference between the enthalpy of the secondary mixed air and the enthalpy of the set supply air state point, calculated on the premise of clean dry air.

[0027] It can be understood that, is a self-defined function, and the meaning is the difference between the enthalpy of the secondary mixed air and the enthalpy of the set supply air state point, calculated on the premise of clean dry air, wherein, is the difference between the enthalpy of the secondary mixed air and the enthalpy of the set supply air state point when is the difference between the enthalpy of the secondary mixed air and the enthalpy of the set supply air state point when

[0028] Step three, if Ψ(0) and Ψ(1) are of different signs, the opening of the primary return air variable air volume valve is adjusted according to the primary return air ratio α, and the energy valve opening is adjusted according to the primary coil outflow temperature Tc1.

[0029] In the embodiment of the present application, in the case of Ψ(0) and Ψ(1) being of different signs, it is determined that the air conditioning box is in the optimal energy-saving mode, at this time, the clean dry air can be obtained, and the reheating can be completely eliminated, the opening of the primary return air variable air volume valve is adjusted according to the primary return air ratio α, and the energy valve opening is adjusted according to the primary coil outflow temperature Tc1.

[0030] Step four, if Ψ(0) and Ψ(1) are of the same sign and are both less than 0, the opening of the primary return air variable air volume valve is adjusted so that the primary return air ratio α=0, and the corresponding primary coil outflow temperature Tc1 is calculated to adjust the energy valve opening.

[0031] ​​​In the embodiment of the present application, when Ψ(0) and Ψ(1) are of the same sign and are both less than 0, it is determined that the air conditioning box must be reheated, the opening of the primary return air variable air volume valve is adjusted so that the primary return air ratio α=0, the primary coil outlet air temperature Tc1 when the primary return air ratio α=0 is calculated, and then the energy valve opening is adjusted according to the primary coil outlet air temperature Tc1 when the primary return air ratio α=0.

[0032] Step five, if Tc1≤Tcw+3.5, the primary coil outlet air temperature is set to Tcw+3.5, α* required to completely remove the moisture is calculated, the opening of the primary return air variable air volume valve is adjusted, and the energy valve opening is adjusted so that the primary coil outlet air temperature reaches Tcw+3.5.

[0033] In the embodiment of the present application, when Tc1≤Tcw+3.5, it is determined that the primary cold coil is insufficient to treat the air to Tc1, the primary coil outlet air temperature is set to Tcw+3.5, α* required to completely remove the moisture is calculated, and then the opening of the primary return air variable air volume valve is adjusted so that the primary return air ratio is adjusted to α*, and the energy valve opening is adjusted so that the primary coil outlet air temperature reaches Tcw+3.5.

[0034] Step six, the primary return air and the secondary return air are mixed, the temperature is adjusted to the supply air state point by the reheating coil, the actual cooling load and the actual moisture load in the room are calculated, the latest supply air state point is calculated, the primary coil outlet air temperature Tc1 and the primary return air ratio α are recalculated.

[0035] In the embodiment of the present application, the primary return air treated by the primary cold coil is mixed with the secondary return air, when Ψ(0) and Ψ(1) are of the same sign or Tc1≤Tcw+3.5, the temperature is adjusted to the supply air state point by the reheating coil, the actual cooling load and the actual moisture load in the room are calculated according to the sensing monitoring data, the latest supply air state point is calculated according to the actual cooling load and the actual moisture load in the room, then the primary coil outlet air temperature Tc1 and the primary return air ratio α are recalculated according to the latest supply air state point, and the cycle of step one is entered.

[0036] Further, as shown in Figure 3 A system diagram of the all-weather self-adaptive energy-saving air conditioning box provided by the embodiment of the present application is shown, and in another embodiment, an all-weather self-adaptive energy-saving air conditioning box is provided, a computer program is stored on the all-weather self-adaptive energy-saving air conditioning box, and the computer program is executed by a processor to enable the processor to perform the following steps: Step one, receiving input initialization data and collecting sensing monitoring data, calculating the primary coil outlet air temperature Tc1 and the primary return air ratio α, and comparing the primary coil outlet air temperature Tc1 with the primary coil water supply temperature Tcw; Step two, if Tc1>Tcw+3.5, then calculate Ψ(0) and Ψ(1), and determine whether Ψ(0) and Ψ(1) are of different signs; Step three, if Ψ(0) and Ψ(1) are of different signs, then adjust the opening of the primary return air variable air volume valve according to the primary return air ratio α, and adjust the energy valve opening according to the primary coil outlet air temperature Tc1; Step four, if Ψ(0) and Ψ(1) are of the same sign and less than 0 at the same time, then adjust the opening of the primary return air variable air volume valve so that the primary return air ratio α=0, and calculate the corresponding primary coil outlet air temperature Tc1 to adjust the energy valve opening; Step five, if Tc1≤Tcw+3.5, then set the primary coil outlet air temperature to Tcw+3.5, calculate the α* required to remove the wet, adjust the opening of the primary return air variable air volume valve, and adjust the energy valve opening so that the primary coil outlet air temperature reaches Tcw+3.5; Step six, mix the primary return air and the secondary return air, adjust the temperature to the supply air state point by the reheating coil, calculate the actual cooling load and the actual wet load in the room, calculate the latest supply air state point, recalculate the primary coil outlet air temperature Tc1 and the primary return air ratio α.

[0037] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An all-weather adaptive energy saving control method, characterized by, The method specifically comprises the following steps: receiving input initialization data, collecting sensing monitoring data, calculating primary coil outlet air temperature Tc1 and primary return air ratio a, and comparing the primary coil outlet air temperature Tc1 with primary coil water supply temperature Tcw; if Tc1>Tcw+3.5, calculating Ψ(0) and Ψ(1), and judging whether Ψ(0) and Ψ(1) are of different signs; if Ψ(0) and Ψ(1) are of different signs, adjusting the opening degree of a primary return air variable air volume valve according to the primary return air ratio a, and adjusting the opening degree of an energy valve according to the primary coil outlet air temperature Tc1; if Ψ(0) and Ψ(1) are of the same sign and are less than 0 at the same time, adjusting the opening degree of the primary return air variable air volume valve so that the primary return air ratio a=0, and calculating the corresponding primary coil outlet air temperature Tc1 to adjust the opening degree of the energy valve; if Tc1≤Tcw+3.5, setting the primary coil outlet air temperature as Tcw+3.5, calculating a* required to remove clean wet, adjusting the opening degree of the primary return air variable air volume valve, and adjusting the opening degree of the energy valve so that the primary coil outlet air temperature reaches Tcw+3.5; mixing the primary return air and the secondary return air, adjusting the temperature to the supply air state point by a reheating coil, calculating the actual cold load and the actual wet load in the room, calculating the latest supply air state point, recalculating the primary coil outlet air temperature Tc1 and the primary return air ratio a.

2. The all-weather self-adaptive energy-saving control method according to claim 1, characterized in that, The calculation formulae of the primary coil outlet air temperature Tc1 and the primary return air ratio a are: ； ； ； wherein, is the humidity ratio function corresponding to the primary coil outlet air temperature; is the total humidity ratio function of the primary mixed air after passing through the primary cooling coil; is the total mass flow of the primary mixed air; is the humidity ratio of the secondary mixed air; is the fresh air ratio; is the humidity ratio of the return air; is the rational function about the primary return air ratio, which is the humidity ratio of the primary mixed air after passing through the primary cooling coil except for clean wet; is the specific enthalpy function corresponding to the primary coil outlet air temperature; is the total energy function of the primary mixed air after passing through the primary cooling coil; is the specific enthalpy of the secondary mixed air; is the specific enthalpy of the return air; is the rational function about the primary return air ratio, which is the specific enthalpy of the primary mixed air after passing through the primary cooling coil except for clean energy; is the iterative calculation formula for solving the primary return air ratio α, which is derived from function , that is, the primary coil outlet air temperature is , the state of clean wet is reached, and then is substituted into function, and it is verified whether is equal to , and the iterative calculation is performed until the unique value of the primary return air ratio α is obtained, so that , that is, the state of clean wet and clean energy is reached.

3. The all-weather self-adaptive energy-saving control method according to claim 2, characterized in that, The calculation formulae of the calculation of Ψ(0) and Ψ(1) are: ； wherein, is the difference between the enthalpy of the calculated secondary air mixing and the enthalpy of the set supply air state point under the condition of being free of wetness.

4. The all-weather self-adaptive energy-saving control method according to claim 3, characterized in that, The calculation Ψ(0) and Ψ(1), and judge whether Ψ(0) and Ψ(1) are different signs in: find The time primary coil out air temperature , get ; find The time primary coil out air temperature , get If Ψ(0) and Ψ(1) are different signs, there is a point, so that the air conditioning box can completely eliminate the reheat, that is, the best energy-saving point; if And All less than 0, then inevitable reheat.

5. The all-weather self-adaptive energy saving control method according to claim 1, wherein, The adjusting of the opening degree of the primary return air variable air volume valve according to the primary return air ratio a and the adjusting of the opening degree of the energy valve according to the primary coil outlet air temperature Tc1 specifically comprise the following steps: judging that the air conditioning box is in the best energy-saving mode, at this time, clean wet can be removed and reheating can be completely eliminated; adjusting the opening degree of the primary return air variable air volume valve according to the primary return air ratio a; adjusting the opening degree of the energy valve according to the primary coil outlet air temperature Tc1.

6. The all-weather self-adaptive energy saving control method according to claim 1, wherein, The adjusting of the opening degree of the primary return air variable air volume valve so that the primary return air ratio a=0 and the adjusting of the opening degree of the energy valve according to the corresponding primary coil outlet air temperature Tc1 specifically comprise the following steps: judging that the air conditioning box must be reheated; adjusting the opening degree of the primary return air variable air volume valve so that the primary return air ratio a=0; calculating the primary coil outlet air temperature Tc1 when the primary return air ratio a=0; adjusting the opening degree of the energy valve according to the primary coil outlet air temperature Tc1 when the primary return air ratio a=0.

7. The all-weather self-adaptive energy saving control method according to claim 1, characterized in that, The setting of the primary coil outlet air temperature as Tcw+3.5, the calculation of a* required to remove clean wet, the adjusting of the opening degree of the primary return air variable air volume valve, and the adjusting of the opening degree of the energy valve so that the primary coil outlet air temperature reaches Tcw+3.5 specifically comprise the following steps: judging that the primary cold coil is insufficient to treat the air to Tc1 at this time; setting the primary coil outlet air temperature as Tcw+3.5; calculating a* required to remove clean wet; adjusting the opening degree of the primary return air variable air volume valve so that the primary return air ratio is adjusted to a*; adjusting the opening degree of the energy valve so that the primary coil outlet air temperature reaches Tcw+3.

5. The energy valve opening is adjusted so that the primary coil outlet air temperature reaches Tcw+3.

5.

8. The all-weather self-adaptive energy saving control method according to claim 1, characterized in that, The primary return air and the secondary return air are mixed, the temperature is adjusted to the supply air state point by the reheating coil, the indoor actual cooling load and the actual humidity load are calculated, the latest supply air state point is calculated, and the primary coil outlet air temperature Tc1 and the primary return air ratio a are recalculated, specifically including the following steps: The primary return air treated by the primary cooling coil is mixed with the secondary return air, and the temperature is adjusted to the supply air state point by the reheating coil; According to the sensing monitoring data, the indoor actual cooling load and the actual humidity load are calculated; According to the indoor actual cooling load and the actual humidity load, the latest supply air state point is calculated; According to the latest supply air state point, the primary coil outlet air temperature Tc1 and the primary return air ratio a are recalculated.

9. An all-weather self-adapting energy-efficient air conditioning unit, characterized in that, The all-weather adaptive energy-saving air conditioning box has a computer program stored thereon, and the computer program is executed by a processor to enable the processor to execute the steps of the all-weather adaptive energy-saving control method according to any one of claims 1 to 8.

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