CN116594449A - Jacket-based tank temperature control method and device - Google Patents

Abstract

The embodiment of the invention discloses a jacket-based tank temperature control method, which comprises the following steps of: acquiring a tank temperature measured value T0_PV according to a first sampling interval; calculating a difference DeltaT0 between the tank temperature measured value T0_PV and the tank temperature target value T0_SP; comparing the difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3; calculating a jacket temperature set point T_SP according to the jacket temperature calculation rule; controlling the temperature of the jacket based on the jacket temperature set point t_sp; the above steps are cycled until the tank temperature measurement t0_pv falls within the target tank temperature threshold range. Corresponding jacket temperature calculation rules are correspondingly arranged in different threshold ranges, so that the overshoot problem caused by time lag of a jacket temperature control system can be avoided, the temperature adjustment time is saved, and the temperature control accuracy is improved.

Description

Jacket-based tank temperature control method and device

Technical Field

The invention relates to the technical field of industrial control, in particular to a jacket-based tank temperature control method and a jacket-based tank temperature control device.

Background

Temperature is a key process parameter in the production process of the process industry, wherein a jacket heating mode is a common temperature control method. The jacket heating mode is to transfer heat by utilizing the temperature difference between the heating medium in the jacket and the material in the tank, and indirectly control the temperature of the tank by controlling the temperature of the medium in the jacket. In the production process, the accuracy of temperature control directly influences the quality of the product. For example, the temperature during pharmaceutical crystallization can affect the supersaturation of the solution; too fast or too slow a temperature change can reduce the quality of the product or even lead to rejection of the entire batch of products; the temperature of the reactor can influence the quality of cell fermentation, the sterilization effect and the like in the biopharmaceutical process; affecting the rate of dissolution, the quality of crystallization, etc. in chemicals.

Jacket-based temperature control is a control difficulty in the process industry, which has the following problems:

(1) The control difficulty is high: the chemical reaction process of reactants in the tank body is often accompanied by energy absorption and release, and the temperature control mode of the tank body is indirectly controlled by means of medium heat transfer, so that the characteristics of large inertia and large hysteresis of jacket-based temperature control are caused, and the control difficulty is increased;

(2) The rapidity and precision are not good: in the prior art, PID is typically used to control the temperature of the medium in the jacket. In the final stage of control (i.e. when the tank temperature is close to the target value of the tank temperature), the temperature set point of the jacket is also at a higher value, resulting in a significant temperature overshoot.

(3) The adjustment speed is too slow: in order to reduce deviation and overshoot, PID parameters need to be adjusted, and the speed of jacket temperature set point calculation is slowed down, thereby slowing down the adjustment, increasing the adjustment time and reducing the efficiency.

Disclosure of Invention

In view of the foregoing, embodiments of the present application provide a jacket-based tank temperature control method and apparatus for at least partially solving the above-mentioned technical problems.

In a first aspect, an embodiment of the present application provides a jacket-based tank temperature control method, including the steps of:

acquiring a tank temperature measured value T0_PV according to a first sampling interval;

calculating a difference DeltaT 0 between the tank temperature measured value T0_PV and the tank temperature target value;

comparing the difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3;

calculating a jacket temperature set point T_SP according to the jacket temperature calculation rule;

Controlling the temperature of the jacket based on the jacket temperature set point t_sp;

the above steps are cycled until the tank temperature measurement t0_pv falls within the target tank temperature threshold range.

In one embodiment, the N tank temperature threshold ranges include a first tank temperature threshold range, a second tank temperature threshold range, a third tank temperature threshold range, a fourth tank temperature threshold range, and a fifth tank temperature threshold range, wherein,

the tank temperature threshold range of DeltaT0 > e2_SP is a first tank temperature threshold range;

the tank temperature threshold range of e1_SP < [ delta ] T0 is less than or equal to e2_SP is a second tank temperature threshold range;

the tank temperature threshold range of e3_SP is more than or equal to deltaT 0 and less than or equal to e1_SP is a third tank temperature threshold range;

the tank temperature threshold range of e4_SP is less than or equal to DeltaT0 < e3_SP is a fourth tank temperature threshold range;

the tank temperature threshold range of Δt0< e4_sp is a fifth tank temperature threshold range;

e1_sp, e2_sp, e3_sp, e4_sp are tank temperature parameters, wherein e1_sp and e2_sp are positive values and e1_sp < e2_sp, e3_sp and e4_sp are negative values and e3_sp > e4_sp.

In one embodiment, the jacket temperature calculation rule corresponding to the first tank temperature threshold range is: tjsp=t0_sp- [ k0|Δt0 _i |+[K0’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the second tank temperature threshold range is as follows: tjsp=t0_sp- [ k1|Δt0 _i |+[K1’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the third tank temperature threshold range is as follows: tsp=t0_sp; the jacket temperature calculation rule corresponding to the fourth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k2 ] Δt0 _i |+[K2’*(|△T0 i|-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the fifth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k3|Δt0 ] _i |+[K3’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the Wherein, K0', K1', K2 'and K3, K3' are calculated parameters.

In one embodiment, at least one of the first tank temperature threshold range, the second tank temperature threshold range, the fourth tank temperature threshold range, and the fifth tank temperature threshold range includes N sub-threshold ranges, each of which is provided with a jacket temperature calculation rule.

In one embodiment, the step of controlling the temperature of the jacket based on the jacket temperature set point t_sp further comprises:

obtaining a jacket temperature parameter set, wherein the jacket temperature parameter set at least comprises two jacket parameters;

comparing the jacket temperature parameter set with a jacket temperature control curve, and determining a first application rule of a refrigerant heating medium corresponding to a temperature control quadrant to which the jacket temperature parameter set belongs according to a comparison result;

And controlling the working states of the refrigerant controller and the heating medium controller according to the first application rule of the refrigerant heating medium.

In one embodiment, each tank temperature threshold range corresponds to a second application rule provided with a refrigerant heating medium, wherein,

the second application rule of the refrigerant heating medium corresponding to the first tank temperature threshold range is as follows: enabling the refrigerant controller, and disabling the heating medium controller;

the second usage rule of the refrigerant heating medium corresponding to the second tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

the second application rule of the refrigerant heating medium corresponding to the third tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

the second application rule of the refrigerant heating medium corresponding to the fourth tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

the second application rule of the refrigerant heating medium corresponding to the fifth tank temperature threshold range is as follows: the refrigerant controller is not enabled, and the heating medium controller is enabled.

In one embodiment, the step of controlling the working states of the refrigerant controller and the heat medium controller according to the first application rule of the refrigerant heat medium further includes:

acquiring a second application rule of the refrigerant heating medium corresponding to the current tank temperature measured value T0_PV;

And controlling the working states of the refrigerant controller and the heating medium controller based on the second application rule of the refrigerant heating medium and the first application rule of the refrigerant heating medium.

In one embodiment, the jacket temperature parameter set includes two jacket parameters: the step of obtaining the jacket temperature parameter set further includes the steps of:

acquiring a jacket temperature measurement T_PV according to a second sampling interval;

calculating a difference DeltaT between the jacket temperature measurement T_PV and the jacket temperature set point T_SP;

calculating the jacket temperature measurement T_PV at the current moment _i Jacket temperature measurement T_PV from last time _i-1 Is defined as the difference DeltaT_tre.

In one embodiment, the jacket temperature control profile includes six temperature control quadrants, wherein,

the temperature control conditions of the first temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the first temperature control quadrant is that DeltaT_tre <0 and DeltaT > e3' _SP: enabling the refrigerant PID controller and disabling the heating medium PID controller;

the temperature control conditions of the second temperature control quadrant are as follows: the delta T_tre is less than 0, the e4'_SP is less than or equal to delta T and less than or equal to e3' _SP, and the first application rule of the refrigerant heating medium of the second temperature control quadrant is as follows: the refrigerant PID controller is closed, and the heating medium PID controller outputs with the minimum value;

The temperature control conditions of the third temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the third temperature control quadrant is that DeltaT_tre is <0 and DeltaT is < e4' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

the temperature control conditions of the fourth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the fourth temperature control quadrant is that DeltaT_tre >0 and DeltaT < e1' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

the temperature control conditions of the fifth temperature control quadrant are as follows: the delta T_tre >0 and the e1'_SP is less than or equal to delta T and less than or equal to e2' _SP, and the first application rule of the refrigerant heating medium of the fifth temperature control quadrant is as follows: the refrigerant PID controller outputs with the minimum value, and the heating medium PID controller is not enabled;

the temperature control conditions of the sixth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the sixth temperature control quadrant is as follows: enabling the refrigerant PID controller and disabling the heating medium PID controller;

wherein e1'_sp, e2' _sp, e3'_sp, e4' _sp are threshold parameters of jacket temperature, wherein e1'_sp and e2' _sp are positive values and e1'_sp < e2' _sp, e3'_sp and e4' _sp are negative values and e3'_sp > e4' _sp.

In a second aspect, embodiments of the present application provide a jacket-based tank temperature control apparatus, comprising:

The acquisition module is used for: for acquiring a tank temperature measurement t0_pv at a first sampling interval;

the calculation module: for calculating a difference DeltaT 0 between the tank temperature measurement T0_PV and the tank temperature target value;

and a comparison module: the temperature control method comprises the steps of comparing a difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3;

the calculation module: the method is used for calculating a jacket temperature set value T_SP according to the jacket temperature calculation rule;

and the control module is used for: for controlling the temperature of the jacket based on the jacket temperature set point t_sp.

According to the jacket-based tank temperature control method and device provided by the embodiment of the application, the jacket temperature set value T_SP is calculated by adopting different jacket temperature calculation rules according to the threshold range described by the difference DeltaT 0 between the tank temperature measured value T0_PV and the tank temperature target value T0_SP, the temperature of the jacket is controlled based on the jacket temperature set value T_SP, and the tank temperature measured value T0_PV meets the target tank temperature threshold range through heat exchange between the medium in the jacket and the tank body, so that the control requirement is met. Corresponding jacket temperature calculation rules are correspondingly arranged in different threshold ranges, so that the overshoot problem caused by time lag of a jacket temperature control system can be avoided, the temperature adjustment time is saved, and the temperature control accuracy is improved.

Drawings

The above and other features and advantages of the present application will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

FIG. 1 is a heating schematic diagram according to the present jacket heating mode;

FIG. 2 is a schematic diagram of a tank temperature threshold range according to an embodiment of the application;

FIG. 3 is a jacket temperature control graph according to an embodiment of the present application;

fig. 4 is a control block diagram of a jacket-based tank temperature control method according to an embodiment of the present application.

Fig. 5 is a control effect diagram achieved by the jacket-based tank temperature control method according to the embodiment of the present application.

Reference numerals:

t0 tank temperature

T is the jacket temperature;

m1 circulating pump

V1 heating medium regulating valve

V2 refrigerant regulating valve

V3 path switching valve

501, first temperature control quadrant: enabling the refrigerant PID controller and disabling the heating medium PID controller;

502, second temperature control quadrant: the refrigerant PID controller is closed, and the heating medium PID controller outputs with the minimum value;

503, third temperature control quadrant: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

504, fourth temperature control quadrant: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

505 fifth temperature control quadrant: the refrigerant PID controller outputs at the minimum value and the heating medium PID controller is not enabled

506, sixth temperature control quadrant: enabling the refrigerant PID controller and disabling the heating medium PID controller

61 jacket temperature calculation rule

62 refrigerant controller

63 heat medium controller

64 first application rule of refrigerant heating medium

65 jacket

66 tank temperature

S1, tank temperature target value

S1': can temperature measurement

S2, jacket temperature set point

S2': jacket temperature measurement

C1 refrigerant regulating valve

C2 heating medium regulating valve

Detailed Description

The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.

For simplicity and clarity of description, the following description sets forth aspects of the invention by describing several exemplary embodiments. Numerous details in the embodiments are provided solely to aid in the understanding of the invention. It will be apparent, however, that the embodiments of the invention may be practiced without limitation to these specific details. Some embodiments are not described in detail in order to avoid unnecessarily obscuring aspects of the present invention, but rather only to present a framework. Hereinafter, "comprising" means "including but not limited to", "according to … …" means "according to at least … …, but not limited to only … …". The term "a" or "an" is used herein to refer to a number of components, either one or more, or at least one, unless otherwise specified.

Temperature is a key process parameter in the production process of the process industry, wherein a jacket heating mode is a common temperature control method. The jacket heating mode is to transfer heat by utilizing the temperature difference between the heating medium in the jacket and the material in the tank, and indirectly control the temperature of the tank by controlling the temperature of the medium in the jacket. In the production process, the accuracy of temperature control directly influences the quality of the product. For example, the temperature during pharmaceutical crystallization can affect the supersaturation of the solution; too fast or too slow a temperature change can reduce the quality of the product or even lead to rejection of the entire batch of products; the temperature of the reactor can influence the quality of cell fermentation, the sterilization effect and the like in the biopharmaceutical process; affecting the rate of dissolution, the quality of crystallization, etc. in chemicals.

Jacket-based temperature control is a control difficulty in the process industry, which has the following problems:

(1) The control difficulty is high: the chemical reaction process of reactants in the tank body is often accompanied by energy absorption and release, and the temperature control mode of the tank body is indirectly controlled by means of medium heat transfer, so that the characteristics of large inertia and large hysteresis of jacket-based temperature control are caused, and the control difficulty is increased;

(2) The rapidity and precision are not good: in the prior art, PID is typically used to control the temperature of the medium in the jacket. In the final stage of control (i.e. when the tank temperature is close to the target value of the tank temperature), the temperature set point of the jacket is also at a higher value, resulting in a significant temperature overshoot.

(3) The adjustment speed is too slow: in order to reduce deviation and overshoot, PID parameters need to be adjusted, and the speed of jacket temperature set point calculation is slowed down, thereby slowing down the adjustment, increasing the adjustment time and reducing the efficiency.

In view of the above, embodiments of the present application provide a jacket-based can temperature control method to at least partially solve the above-mentioned problems.

Specific implementations of embodiments of the application are described in detail below with reference to the accompanying drawings.

For ease of understanding, the principle of operation of the jacket heating mode will be described first with reference to fig. 1. Fig. 1 is a schematic diagram of jacket heating according to an embodiment of the present application.

As shown in fig. 1, the circulation pump is kept running all the time to ensure circulation of the medium in the jacket; when the tank temperature is required to be increased, the path switching valve is switched to a heating path, a heating medium controlled by the heating medium adjusting valve enters the jacket, the medium temperature in the jacket is increased, and the jacket medium is fully contacted with the outer wall of the tank body through self-circulation of the jacket so as to realize non-contact heat exchange between the jacket medium and the material in the tank body, so that the temperature of the tank is increased; when cooling is needed, the path switching valve is switched to a refrigerating path, a refrigerant controlled by the refrigerant regulating valve enters the jacket, an original medium of the jacket enters the backflow pipeline, and the jacket is fully contacted with the outer wall of the tank through self-circulation of the jacket to realize non-contact cold exchange with materials in the tank, so that the purpose of cooling is achieved.

There are a number of ways of jacket-based heat exchange, one of which is described above by way of example only in connection with fig. 1.

Based on the working principle of the jacket-based tank temperature control, the jacket-based tank temperature control method provided by the embodiment of the application comprises the following steps:

s201: acquiring a tank temperature measured value T0_PV according to a first sampling interval;

due to the extremely nonlinear, large inertia and large hysteresis characteristics of the temperature control process, the jacket-based tank temperature control method provided by the embodiment of the application can be used for continuously acquiring the tank temperature measured value T0_PV of the solution according to the preset sampling interval, so that the current tank temperature can be determined in real time, further the acquired tank temperature data can be further analyzed and a corresponding control strategy is adopted, thereby achieving the control requirement and effectively avoiding overshoot. The size of the sampling interval may be set according to control requirements or the characteristics of the solution in the tank. The sampling interval may also be adjusted accordingly based on the magnitude of the deviation between the tank temperature measurement t0_pv and the tank temperature target value t0_sp. For example, when the deviation between the tank temperature measurement value t0_pv and the tank temperature target value t0_sp is large, the sampling interval may be appropriately increased to reduce the system load; and when the measured value T0_PV of the tank temperature is close to the target value T0_SP of the tank temperature, the sampling interval can be reduced, so that the sampling precision is improved, and the control precision is further improved.

In order to further improve the sampling precision, a plurality of sampling points can be arranged in the tank, and the average value of the tank temperature acquired by the sampling points at the same time is calculated, so that sampling errors caused by uneven material reaction or uneven stirring in the tank are avoided, and the sampling precision is improved.

S202: calculating the difference Δt0 of the tank temperature measurement t0_pv and the tank temperature target value t0_sp, i.e. Δt0=t0_pv-t0_sp;

the difference Δt0 reflects the deviation between the tank temperature measurement t0_pv and the tank temperature target value t0_sp. For example, when the tank temperature target value t0_sp is 50 ℃, and the tank temperature measurement value acquired at time T1 is (37 ℃, T1), the difference Δt0=37 ℃ -50 ℃ = -13 ℃. It can be seen that the difference Δt0 is a signed value, where the sign reflects the nature of the current tank temperature (i.e., the current tank temperature is lower or higher than the tank temperature target value), and if the difference Δt0 is negative, it indicates that the current tank temperature measurement t0_pv is lower than the tank temperature target value, and the tank temperature needs to be raised; if the difference delta T0 is a positive value, the current tank temperature measured value T0_PV is higher than the tank temperature target value, and the tank temperature needs to be reduced; and the magnitude of the difference Δt0 (i.e., absolute value Δt0) reflects the magnitude of the deviation between the tank temperature measurement value t0_pv and the tank temperature target value t0_sp.

S203: comparing the difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3;

the temperature control of the jacket heating mode is realized by the heat transfer of the heated medium in the jacket. Because the thermal inertia of the jacket heating mode is large, the temperature rising speed of the medium in the jacket is far higher than the rising speed of the material temperature in the tank, and the traditional temperature control method is to calculate the temperature set value of the jacket according to the tank Wen Piancha by using a PID controller. However, in this temperature control method, when the tank temperature is immediately close to the tank temperature target value t0_sp, the jacket temperature set value calculated by the PID controller is still at a relatively high value, and the jacket set value is gradually decreased only when a large overshoot occurs, so that the jacket set value calculated in this control method is not accurate enough to easily cause the overshoot. For example, the target tank temperature was 45 ℃, the initial tank material temperature was 26.8 ℃, and the jacket medium temperature was 28.8 ℃. At this time, the switch of the heater in the jacket is turned on. When the pot temperature reached 40 ℃, the heater was stopped, and the medium temperature in the jacket was as high as 87 ℃. Because of the temperature difference, the medium in the jacket can continue to transfer heat, so that the temperature of the material in the tank can be continuously increased, and finally, a new equilibrium state is achieved when the temperature difference between the inner temperature and the outer temperature is two degrees centigrade, and the temperature of the material in the tank is 56.2 ℃ at the moment, and is seriously overshot.

Therefore, in order to solve the above-mentioned problem, in the tank temperature value stabilization control method of the present embodiment, N tank temperature threshold ranges are preset based on the magnitude and the property of the difference Δt0, where each tank temperature threshold range is correspondingly provided with a corresponding jacket temperature calculation rule, for example, in a section where the tank temperature measured value t0_pv is greater than the tank temperature target value t0_sp and the deviation between the two is greater, a high gain control strategy is adopted, that is, a lower jacket set value t_sp is set compared with the tank temperature target value t0_sp, and a relatively lower jacket makes heat exchange between the jacket medium and the tank temperature faster, so that the tank temperature is rapidly reduced, the deviation between the tank temperature measured value t0_pv and the tank temperature target value t0_sp is rapidly reduced, so that the adjustment time is saved, and the adjustment efficiency is improved. And because the deviation between the measured value T0_PV of the tank temperature and the target value T0_SP of the tank temperature is large in the section, the control strategy with high gain does not generate the problem of overshoot. For the section of the measured value T0_PV of the tank temperature close to the target value T0_SP of the tank temperature, a mild control strategy, such as a lower gain, an increase of the adjustment time and the like, is adopted, so that overshoot is effectively avoided, the measured value T0_PV of the tank temperature is enabled to be continuously close to the target value T0_SP of the tank temperature, and the control requirement is met.

The number of the tank temperature threshold ranges can be set according to control requirements and project requirements, and can be any integer greater than or equal to 3, such as 2,3,4,5,6 and the like, wherein each threshold range is correspondingly provided with a corresponding jacket temperature calculation rule.

Specifically, in one embodiment, five tank temperature threshold ranges, a first tank temperature threshold range, a second tank temperature threshold range, a third tank temperature threshold range, a fourth tank temperature threshold range, and a fifth tank temperature threshold range, respectively, are set based on the nature and magnitude of the difference Δt0, as shown in table 1 and fig. 2:

TABLE 1

Wherein e1_sp, e2_sp, e3_sp, e4_sp are tank temperature parameters, e1_sp and e2_sp are positive values and e1_sp < e2_sp, e3_sp and e4_sp are negative values and e3_sp > e4_sp.

As can be seen from table 1 and fig. 2, in the first tank temperature threshold range, the tank temperature measured value t0_pv is larger than the tank temperature target value t0_sp and the deviation between the tank temperature measured value t0_pv and the tank temperature target value t0_sp is larger, so that the deviation between the tank temperature measured value t0_pv and the tank temperature target value t0_sp is rapidly reduced by adopting the rapid cooling control method in the first tank temperature threshold range, and the rapid cooling control method does not cause overshoot because the deviation between the tank temperature measured value t0_pv and the tank temperature target value t0_sp is larger in the threshold range. Similarly, in the fifth tank temperature threshold range, the tank temperature measured value t0_pv is smaller than the tank temperature target value t0_sp, the deviation between the tank temperature measured value t0_pv and the tank temperature target value t0_sp is larger, and the rapid temperature rise control is adopted, so that the control time can be saved, and overshoot can not be caused.

In the third tank temperature threshold range, the tank temperature measurement value t0_pv is located near the tank temperature target value t0_sp, which is the threshold range in which overshoot is most likely to occur, and therefore, an accurate temperature control manner is adopted in the third tank temperature threshold range.

The second tank temperature threshold range is positioned between the first tank temperature threshold range and the third tank temperature threshold range, and a medium speed cooling control strategy is adopted; the fourth tank temperature threshold range is positioned between the third tank temperature threshold range and the fifth tank temperature threshold range, and a medium-speed heating control strategy is adopted, so that the medium-speed control strategy takes the adjustment efficiency and the adjustment accuracy into consideration.

Specifically, based on the above example, in one embodiment, at least one of the first tank temperature threshold range, the second tank temperature threshold range, the fourth tank temperature threshold range, and the fifth tank temperature threshold range includes N sub-threshold ranges, each of which is provided with a jacket temperature calculation rule correspondingly.

S204: calculating a jacket temperature set point T_SP according to the jacket temperature calculation rule;

TABLE 2

Wherein, K0', K1', K2 'and K3, K3' are calculated parameters. As can be seen from table 2, the jacket temperature calculation rule for each tank temperature threshold range is composed of two parts, and is described below by taking formula (1) as an example.

Equation (1) is a jacket temperature calculation rule for a first tank temperature threshold range, wherein the first part of the equation is based on |Δt0 _i The magnitude of l calculates the jacket temperature set point, the second part of the equation is based on the rate of change of the tank temperature difference (|Δt0) _i |-|△T0 _i-1 I) the jacket temperature set point T SP is further adjusted. In the first tank temperature threshold range, the tank temperature measured value T0_PV is larger than the tank temperature target value T0_SP, and the deviation between the tank temperature measured value T0_PV and the tank temperature target value T0_SP is larger, so that the tank temperature measured value T0_PV is a rapid cooling zone. The first part of the formula is based on DeltaT 0 _i The magnitude of I calculates the jacket temperature set point, and when the calculation parameter K0 is fixed, I delta T0 _i The larger the i, the smaller the temperature set point t_sp of the jacket, i.e., the larger the temperature difference between the temperature set point t_sp of the jacket and the tank temperature set point t0_sp, compared to the tank temperature set point t0_sp, and the larger the temperature difference is beneficial to promoting heat exchange between the materials in the tank and the jacket medium, thereby rapidly decreasing the tank temperature. The second part of the formula is based on the rate of change of the tank temperature difference (|Δt0) _i |-|△T0 _i-1 I) the temperature set point T_SP of the jacket is further adjusted, if the change rate of the tank temperature difference is more than 0 (delta T0) _i |-|△T0 _i-1 |>0) I.e. |DeltaT0 _i |>|△T0 _i-1 I, it shows that the tank temperature deviation at the present time is rather large (the correct trend should be that the tank Wen Piancha is reduced) compared to the tank Wen Piancha at the previous time, and therefore the set value of the jacket temperature needs to be further lowered, as shown in table 3; if the change rate of the temperature difference of the tank temperature is smaller than 0 (delta T0) _i |-|△T0 _i-1 |<0) I.e. |DeltaT0 _i |<|△T0 _i-1 I indicates the aboveThe tank Wen Piancha at the present time has a reduced tank temperature deviation as compared to the tank Wen Piancha at the present time, and thus, in order to avoid the overshoot problem caused by the excessively high rate of tank temperature deviation reduction, it is necessary to appropriately adjust back the temperature set point, as shown in table 4. Namely, the formula (1), the formula (2), the formula (4) and the formula (5) calculate the temperature set value T_SP of the jacket from two aspects of rapidity and stability, so that the tank Wen Piancha can be rapidly reduced, the overshoot problem caused by rapid adjustment is avoided, and the rapidity and the stability of tank temperature control are simultaneously satisfied.

TABLE 3 Table 3

TABLE 4 Table 4

S205: the temperature of the jacket is controlled based on the jacket temperature set point t_sp.

According to the jacket temperature set value T_SP, the opening degree of the refrigerant regulating valve is controlled by using a refrigerant controller, and the opening degree of the heat medium regulating valve is controlled by using a heat medium controller, so that the temperature of the jacket is stabilized at the jacket temperature set value T_SP, wherein the refrigerant controller and the heat medium controller can be PID controllers.

Steps S201-S205 are repeated until the tank temperature measurement falls within the target tank temperature threshold range.

In one embodiment, step S205 further comprises:

S2051: obtaining a jacket temperature parameter set, wherein the jacket temperature parameter set at least comprises two jacket parameters;

s2053: comparing the jacket temperature parameter set with a jacket temperature control curve, and determining a first application rule of a refrigerant heating medium corresponding to a temperature control quadrant to which the jacket temperature parameter set belongs according to a comparison result;

s2055: and controlling the working states of the refrigerant controller and the heating medium controller according to the first application rule of the refrigerant heating medium.

The temperature of the medium in the jacket is regulated by controlling the opening degree of the refrigerant regulating valve by the refrigerant controller and controlling the opening degree of the heat medium regulating valve by the heat medium controller, so that the application rules of the refrigerant controller and the heat medium controller are one of the important points and the difficult points of control. Therefore, according to the embodiment of the application, the first application rule of the refrigerant heating medium corresponding to the temperature control quadrant to which the current jacket temperature parameter set belongs is determined according to the comparison result by comparing the current jacket temperature parameter set with the jacket temperature control curve, as shown in fig. 4, and the application states of the refrigerant controller and the heating medium controller are controlled according to the first application rule of the refrigerant heating medium.

Specifically, in one embodiment, each tank temperature threshold range corresponds to a second usage rule provided with a refrigerant heating medium, as shown in table 5:

TABLE 5

Step S205 further includes:

s2056, obtaining a second application rule of the refrigerant heating medium corresponding to the current tank temperature measured value T0_PV; and controlling the application states of the refrigerant controller and the heating medium controller based on the second application rule of the refrigerant heating medium and the first application rule of the refrigerant heating medium.

In one embodiment, the jacket temperature parameter set includes a difference Δt between the jacket temperature measurement value t_pv and the jacket temperature set value t_sp and a trend of the change in the jacket temperature, and the step of obtaining the jacket temperature parameter set further includes:

acquiring a jacket temperature measurement T_PV according to a second sampling interval;

calculating the difference DeltaT between the jacket temperature measurement T_PV and the jacket temperature set point T_SP, i.e. DeltaT=T_PV-T_SP;

calculating the jacket temperature measurement T_PV at the current moment _i Jacket temperature measurement T_PV from last time _i-1 Is the difference of (2)The value Δt_tre, i.e. Δt_tre=t_pv _i -T_PV _i-1 。

Δt reflects the magnitude relation and the magnitude of the deviation between the jacket temperature measurement value t_pv and the jacket temperature set point t_sp. For example, the jacket temperature set point T_SP calculated based on the tank temperature measurement T0_PV and the corresponding formula in Table 2 is 35℃and the jacket temperature measurement T_PV is taken at the present time _i 20 ℃, the difference Δt=20 ℃ -35 ℃ = -15 ℃. It can be seen that the difference Δt is a signed value, where the sign reflects the property of the current jacket temperature (i.e. the current jacket temperature is lower or higher than the temperature set point of the jacket), and if the difference Δt is negative, it indicates that the current jacket temperature measurement t_pv is lower than the temperature set point t_sp, and the heating medium needs to be turned on to raise the jacket temperature; if the difference delta T0 is a positive value, the current jacket temperature measured value T_PV is higher than the temperature set value T_SP, and the refrigerant needs to be started to reduce the jacket temperature; and the magnitude of the difference Δt (i.e., absolute value Δt) reflects the magnitude of the deviation between the jacket temperature measurement value t_pv and the difference Δt of the jacket temperature set value t_sp.

Jacket temperature measurement T_PV at the present time _i Jacket temperature measurement T_PV from last time _i-1 The difference DeltaT_tre of (1) reflects the trend of the jacket temperature change, if T_PV _i >T_PV _i-1 Then DeltaT_tre is a positive number, indicating that the jacket temperature is in the rising phase; conversely, if T_PV _i <T_PV _i-1 Then deltat tre is a negative number indicating that the jacket temperature is in the falling phase.

The difference DeltaT between the jacket temperature measurement value T_PV and the jacket temperature set value T_SP and the variation trend of the jacket temperature are used as control conditions, and the control conditions are compared with a jacket temperature control curve, so that the first application rule of the refrigerant heating medium corresponding to the current jacket temperature can be determined.

Specifically, as shown in table 6 and fig. 3, the jacket temperature control curve includes six temperature control quadrants, wherein,

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TABLE 6

Wherein e1'_sp, e2' _sp, e3'_sp, e4' _sp in table 6 are threshold parameters of jacket temperature, where e1'_sp and e2' _sp are positive values and e1'_sp < e2' _sp, e3'_sp and e4' _sp are negative values and e3'_sp > e4' _sp.

Based on the current tank temperature measured value T0_PV and table 5, a second application rule of the refrigerant heating medium corresponding to the current tank temperature measured value T0_PV can be determined, based on a difference DeltaT between the jacket temperature measured value T_PV and the jacket temperature set value T_SP, a change trend of the jacket temperature and table 6, a first application rule of the refrigerant heating medium corresponding to the current jacket temperature parameter can be determined, the second application rule of the refrigerant heating medium and the first application rule of the refrigerant heating medium are in competition, and the application states of the refrigerant controller and the heating medium controller can be determined, wherein the competition rules are shown in table 7:

TABLE 7

As can be seen from table 7, the bidding rules are: for a certain controller (a refrigerant controller or a heating medium controller), only the first application rule and the second application rule are enabled, and the controller is in an enabled state; otherwise, the controller is disabled.

As shown in FIG. 3, the second temperature control quadrant and the fifth temperature control quadrant are buffer areas, and the buffer areas can avoid the influence of frequent switching of the cooling medium and the heating medium on the stability of the jacket temperature. For example, when the jacket temperature parameter meets the first temperature control quadrant, the refrigerant controller is enabled, and the heating medium controller is not enabled; if the buffer area is not arranged, the refrigerant controller is switched from enable to disable rapidly along with the decrease of the jacket temperature to the third temperature control quadrant, the heating medium controller is switched from disable to enable, the frequent switching of the controller can influence the stability of the jacket temperature, and the buffer area is arranged to avoid the situation.

The control effect of the jacket-based tank temperature control method of this embodiment is shown in fig. 5, where S1 is a tank temperature target value curve, S1 'is a tank temperature measurement value curve, S2 is a jacket temperature set value curve, S2' is a jacket temperature measurement value curve, C1 is an output curve of a refrigerant regulating valve controlled by a refrigerant controller, and C2 is an output curve of a heat medium regulating valve controlled by a heat medium controller, and it can be seen from analysis of fig. 5 that:

(1) The control method can realize a better steady-state effect, wherein the maximum deviation of the steady state is 0.1 ℃ and the standard deviation is 0.1 ℃;

(2) As shown in fig. 5, the tank temperature is rapidly raised by 6 ℃ within 20min from the initial adjustment time t0, the adjustment speed is high and no overshoot occurs; and steady state can be reached within 60min (t 1).

(3) The dynamic stability is good, when the heat is released severely, the deviation of 1 ℃ only occurs, and the heat exchange of the pot is stable within 12 min.

The embodiment of the invention also provides a jacket-based tank temperature control device, which comprises an acquisition module, a calculation module, a comparison module, a calculation module and a control module. The acquisition module is used for acquiring a tank temperature measured value T0_PV according to a first sampling interval; the calculation module is used for calculating a difference delta T0 between the tank temperature measured value T0_PV and the tank temperature target value; the comparison module is used for comparing the difference delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference delta T0 belongs according to a comparison result, wherein N is more than or equal to 3; the calculating module is used for calculating a jacket temperature set value T_SP according to the jacket temperature calculating rule; the control module is used for controlling the temperature of the jacket based on the jacket temperature set value T_SP.

In one embodiment, the N tank temperature threshold ranges include a first tank temperature threshold range, a second tank temperature threshold range, a third tank temperature threshold range, a fourth tank temperature threshold range, and a fifth tank temperature threshold range, wherein the tank temperature threshold range of Δt0> e2_sp is the first tank temperature threshold range; the tank temperature threshold range of e1_SP < [ delta ] T0 is less than or equal to e2_SP is a second tank temperature threshold range; the tank temperature threshold range of e3_SP is more than or equal to deltaT 0 and less than or equal to e1_SP is a third tank temperature threshold range; the tank temperature threshold range of e4_SP is less than or equal to DeltaT0 < e3_SP is a fourth tank temperature threshold range; the tank temperature threshold range of Δt0< e4_sp is a fifth tank temperature threshold range; e1_sp, e2_sp, e3_sp, e4_sp are tank temperature parameters, wherein e1_sp and e2_sp are positive values and e1_sp < e2_sp, e3_sp and e4_sp are negative values and e3_sp > e4_sp.

In one embodiment, the jacket temperature calculation rule corresponding to the first tank temperature threshold range is: tjsp=t0_sp- [ k0|Δt0 _i |+[K0’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the second tank temperature threshold range is as follows: tjsp=t0_sp- [ k1|Δt0 _i |+[K1’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the third tank temperature threshold range is as follows: tsp=t0_sp; the jacket temperature calculation rule corresponding to the fourth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k2 ] Δt0 _i |+[K2’*(|△T0 i|-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the The jacket temperature calculation rule corresponding to the fifth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k3|Δt0 ] _i |+[K3’*(|△T0 _i |-|△T0 _i-1 |)]The method comprises the steps of carrying out a first treatment on the surface of the Wherein, K0', K1', K2 'and K3, K3' are calculated parameters.

In one embodiment, at least one of the first tank temperature threshold range, the second tank temperature threshold range, the fourth tank temperature threshold range, and the fifth tank temperature threshold range includes N sub-threshold ranges, each of which is provided with a jacket temperature calculation rule in correspondence.

In one embodiment, the control module further comprises:

jacket temperature acquisition submodule: obtaining a jacket temperature parameter set, wherein the jacket temperature parameter set at least comprises two jacket parameters;

jacket temperature parameter comparison sub-module: comparing the jacket temperature parameter set with a jacket temperature control curve, and determining a first application rule of a refrigerant heating medium corresponding to a temperature control quadrant to which the jacket temperature parameter set belongs according to a comparison result;

And the commissioning control module is used for: and controlling the working states of the refrigerant controller and the heating medium controller according to the first application rule of the refrigerant heating medium.

In one embodiment, each tank temperature threshold range corresponds to a second usage rule of refrigerant heating medium, where the second usage rule of refrigerant heating medium corresponding to the first tank temperature threshold range is: enabling the refrigerant controller, and disabling the heating medium controller; the second usage rule of the refrigerant heating medium corresponding to the second tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller; the second application rule of the refrigerant heating medium corresponding to the third tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller; the second application rule of the refrigerant heating medium corresponding to the fourth tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller; the second application rule of the refrigerant heating medium corresponding to the fifth tank temperature threshold range is as follows: the refrigerant controller is not enabled, and the heating medium controller is enabled.

In one embodiment, the commissioning control module is further configured to: acquiring a second application rule of the refrigerant heating medium corresponding to the current tank temperature measured value T0_PV; and controlling the working states of the refrigerant controller and the heating medium controller based on the second application rule of the refrigerant heating medium and the first application rule of the refrigerant heating medium.

In one embodiment, the jacket temperature parameter set includes two jacket parameters: the jacket temperature acquisition submodule is further configured to:

acquiring a jacket temperature measurement T_PV according to a second sampling interval;

calculating a difference DeltaT between the jacket temperature measurement T_PV and the jacket temperature set point T_SP;

calculating the jacket temperature measurement T_PV at the current moment _i Jacket temperature measurement T_PV from last time _i-1 Is defined as the difference DeltaT_tre.

In one embodiment, the jacket temperature control curve comprises six temperature control quadrants, wherein the temperature control conditions of the first temperature control quadrant are: the first application rule of the refrigerant heating medium in the first temperature control quadrant is that DeltaT_tre <0 and DeltaT > e3' _SP: enabling the refrigerant PID controller and disabling the heating medium PID controller; the temperature control conditions of the second temperature control quadrant are as follows: the delta T_tre is less than 0, the e4'_SP is less than or equal to delta T and less than or equal to e3' _SP, and the first application rule of the refrigerant heating medium of the second temperature control quadrant is as follows: the refrigerant PID controller is closed, and the heating medium PID controller outputs with the minimum value; the temperature control conditions of the third temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the third temperature control quadrant is that DeltaT_tre is <0 and DeltaT is < e4' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled; the temperature control conditions of the fourth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the fourth temperature control quadrant is that DeltaT_tre >0 and DeltaT < e1' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled; the temperature control conditions of the fifth temperature control quadrant are as follows: the delta T_tre >0 and the e1'_SP is less than or equal to delta T and less than or equal to e2' _SP, and the first application rule of the refrigerant heating medium of the fifth temperature control quadrant is as follows: the refrigerant PID controller outputs with the minimum value, and the heating medium PID controller is not enabled; the temperature control conditions of the sixth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the sixth temperature control quadrant is as follows: enabling the refrigerant PID controller and disabling the heating medium PID controller; wherein e1'_sp, e2' _sp, e3'_sp, e4' _sp are threshold parameters of jacket temperature, wherein e1'_sp and e2' _sp are positive values and e1'_sp < e2' _sp, e3'_sp and e4' _sp are negative values and e3'_sp > e4' _sp.

The embodiment of the invention also provides an electronic device with the processor-memory architecture. The electronic device comprises a processor, a memory, and a computer program stored on the memory and executable on the processor, which when executed by the processor implements a jacket-based can temperature control method as any one of the above. The memory may be embodied as various storage media such as an electrically erasable programmable read-only memory (EEPROM), a Flash memory (Flash memory), a programmable read-only memory (PROM), and the like. A processor may be implemented to include one or more central processors or one or more field programmable gate arrays, where the field programmable gate arrays integrate one or more central processor cores. In particular, the central processor or central processor core can be implemented as a CPU, MCU or DSP, etc.

It should be noted that not all the steps and modules in the above processes and the structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The division of the modules is merely for convenience of description and the division of functions adopted in the embodiments, and in actual implementation, one module may be implemented by a plurality of modules, and functions of a plurality of modules may be implemented by the same module, and the modules may be located in the same device or different devices.

The hardware modules in the various embodiments may be implemented mechanically or electronically. For example, a hardware module may include specially designed permanent circuits or logic devices (e.g., special purpose processors such as FPGAs or ASICs) for performing certain operations. A hardware module may also include programmable logic devices or circuits (e.g., including a general purpose processor or other programmable processor) temporarily configured by software for performing particular operations. As regards implementation of the hardware modules in a mechanical manner, either by dedicated permanent circuits or by circuits that are temporarily configured (e.g. by software), this may be determined by cost and time considerations.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A jacket-based can temperature control method, comprising the steps of:

acquiring a tank temperature measured value T0_PV according to a first sampling interval;

calculating a difference DeltaT0 between the tank temperature measured value T0_PV and the tank temperature target value T0_SP;

Comparing the difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3;

calculating a jacket temperature set point T_SP according to the jacket temperature calculation rule;

controlling the temperature of the jacket based on the jacket temperature set point t_sp;

the above steps are cycled until the tank temperature measurement t0_pv falls within the target tank temperature threshold range.

2. The jacket-based tank temperature control method of claim 1, wherein the N tank temperature threshold ranges comprise a first tank temperature threshold range, a second tank temperature threshold range, a third tank temperature threshold range, a fourth tank temperature threshold range, and a fifth tank temperature threshold range, wherein,

the tank temperature threshold range of DeltaT0 > e2_SP is a first tank temperature threshold range;

the tank temperature threshold range of e1_SP < [ delta ] T0 is less than or equal to e2_SP is a second tank temperature threshold range;

the tank temperature threshold range of e3_SP is more than or equal to deltaT 0 and less than or equal to e1_SP is a third tank temperature threshold range;

the tank temperature threshold range of e4_SP is less than or equal to DeltaT0 < e3_SP is a fourth tank temperature threshold range;

the tank temperature threshold range of Δt0< e4_sp is a fifth tank temperature threshold range;

e1_sp, e2_sp, e3_sp, e4_sp are tank temperature parameters, wherein e1_sp and e2_sp are positive values and e1_sp < e2_sp, e3_sp and e4_sp are negative values and e3_sp > e4_sp.

3. The jacket-based tank temperature control method according to claim 2, wherein,

the jacket temperature calculation rule corresponding to the first tank temperature threshold range is as follows: tjsp=t0_sp- [ k0|Δt0 _i |+[K0’*(|△T0 _i |-|△T0 _i-1 |)]；

The jacket temperature calculation rule corresponding to the second tank temperature threshold range is as follows: tjsp=t0_sp- [ k1|Δt0 _i |+[K1’*(|△T0 _i |-|△T0 _i-1 |)]；

The jacket temperature calculation rule corresponding to the third tank temperature threshold range is as follows: tsp=t0_sp;

the jacket temperature calculation rule corresponding to the fourth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k2 ] Δt0 _i |+[K2’*(|△T0 i|-|△T0 _i-1 |)]；

The jacket temperature calculation rule corresponding to the fifth tank temperature threshold range is as follows: tjsp=t0_sp+ [ k3|Δt0 ] _i |+[K3’*(|△T0 _i |-|△T0 _i-1 |)]；

Wherein K0, K0', K1', K2 'and K3, K3' are calculated parameters, |DeltaT0 _i I is the absolute value of the difference Δt0 at i time, |Δt0 _i-1 I) is the absolute value of the difference at time i-1, deltat 0.

4. The jacket-based tank temperature control method according to claim 3, wherein at least one of the first tank temperature threshold range, the second tank temperature threshold range, the fourth tank temperature threshold range, and the fifth tank temperature threshold range includes N sub-threshold ranges, each of which is provided with a jacket temperature calculation rule in correspondence.

5. The jacket-based tank temperature control method according to claim 3, wherein the step of controlling the temperature of the jacket based on the jacket temperature set value t_sp, further comprises:

Obtaining a jacket temperature parameter set, wherein the jacket temperature parameter set at least comprises two jacket parameters;

comparing the jacket temperature parameter set with a jacket temperature control curve, and determining a first application rule of a refrigerant heating medium corresponding to a temperature control quadrant to which the jacket temperature parameter set belongs according to a comparison result;

and controlling the working states of the refrigerant controller and the heating medium controller according to the first application rule of the refrigerant heating medium.

6. The jacket-based can temperature control method of claim 5, wherein each of the can temperature threshold ranges corresponds to a second application rule provided with a refrigerant heating medium, wherein,

the second application rule of the refrigerant heating medium corresponding to the first tank temperature threshold range is as follows: enabling the refrigerant controller, and disabling the heating medium controller;

the second usage rule of the refrigerant heating medium corresponding to the second tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

the second application rule of the refrigerant heating medium corresponding to the third tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

the second application rule of the refrigerant heating medium corresponding to the fourth tank temperature threshold range is as follows: enabling a refrigerant controller and enabling a heating medium controller;

The second application rule of the refrigerant heating medium corresponding to the fifth tank temperature threshold range is as follows: the refrigerant controller is not enabled, and the heating medium controller is enabled.

7. The jacket-based can temperature control method of claim 6, wherein the step of controlling the operating states of the refrigerant controller and the heating medium controller according to the first application rule of the refrigerant heating medium further comprises:

acquiring a second application rule of the refrigerant heating medium corresponding to the current tank temperature measured value T0_PV;

and controlling the working states of the refrigerant controller and the heating medium controller based on the second application rule of the refrigerant heating medium and the first application rule of the refrigerant heating medium.

8. The jacket-based tank temperature control method of claim 7, wherein the jacket temperature parameter set comprises two jacket parameters: the step of obtaining the jacket temperature parameter set further includes the steps of:

acquiring a jacket temperature measurement T_PV according to a second sampling interval;

calculating a difference DeltaT between the jacket temperature measurement T_PV and the jacket temperature set point T_SP;

calculating the jacket temperature measurement T_PV at the current moment _i And the last timeCarved jacket temperature measurement T_PV _i-1 Is defined as the difference DeltaT_tre.

9. The jacket-based tank temperature control method of claim 8 wherein the jacket temperature control profile comprises six temperature control quadrants, wherein,

the temperature control conditions of the first temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the first temperature control quadrant is that DeltaT_tre <0 and DeltaT > e3' _SP: enabling the refrigerant PID controller and disabling the heating medium PID controller;

the temperature control conditions of the second temperature control quadrant are as follows: the delta T_tre is less than 0, the e4'_SP is less than or equal to delta T and less than or equal to e3' _SP, and the first application rule of the refrigerant heating medium of the second temperature control quadrant is as follows: the refrigerant PID controller is closed, and the heating medium PID controller outputs with the minimum value;

the temperature control conditions of the third temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the third temperature control quadrant is that DeltaT_tre is <0 and DeltaT is < e4' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

the temperature control conditions of the fourth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the fourth temperature control quadrant is that DeltaT_tre >0 and DeltaT < e1' _SP: the refrigerant PID controller is not enabled, and the heating medium PID controller is enabled;

the temperature control conditions of the fifth temperature control quadrant are as follows: the delta T_tre >0 and the e1'_SP is less than or equal to delta T and less than or equal to e2' _SP, and the first application rule of the refrigerant heating medium of the fifth temperature control quadrant is as follows: the refrigerant PID controller outputs with the minimum value, and the heating medium PID controller is not enabled;

The temperature control conditions of the sixth temperature control quadrant are as follows: the first application rule of the refrigerant heating medium in the sixth temperature control quadrant is as follows: enabling the refrigerant PID controller and disabling the heating medium PID controller;

wherein e1'_sp, e2' _sp, e3'_sp, e4' _sp are threshold parameters of jacket temperature, wherein e1'_sp and e2' _sp are positive values and e1'_sp < e2' _sp, e3'_sp and e4' _sp are negative values and e3'_sp > e4' _sp.

10. A jacket-based can temperature control apparatus, comprising:

the acquisition module is used for: for acquiring a tank temperature measurement t0_pv at a first sampling interval;

the calculation module: for calculating a difference DeltaT 0 between the tank temperature measurement T0_PV and the tank temperature target value;

and a comparison module: the temperature control method comprises the steps of comparing a difference value delta T0 with N tank temperature threshold ranges, and determining a jacket temperature calculation rule corresponding to the tank temperature threshold range to which the difference value delta T0 belongs according to a comparison result, wherein N is more than or equal to 3;

the calculation module: the method is used for calculating a jacket temperature set value T_SP according to the jacket temperature calculation rule;

and the control module is used for: for controlling the temperature of the jacket based on the jacket temperature set point t_sp.