CN113687670B - Temperature control method and temperature control system of heat exchanger - Google Patents
Temperature control method and temperature control system of heat exchanger Download PDFInfo
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- CN113687670B CN113687670B CN202110882723.9A CN202110882723A CN113687670B CN 113687670 B CN113687670 B CN 113687670B CN 202110882723 A CN202110882723 A CN 202110882723A CN 113687670 B CN113687670 B CN 113687670B
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention relates to the technical field of semiconductor manufacturing, in particular to a temperature control method and a temperature control system of a heat exchanger, wherein the temperature control method of the heat exchanger comprises the following steps: acquiring the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period; determining that the standard deviation of the refrigerating capacity is smaller than or equal to a first threshold value; determining that the refrigerating capacity output in the current period is greater than or equal to the difference between the average refrigerating capacity and the second threshold and is less than or equal to the sum of the average refrigerating capacity and the second threshold; and setting the refrigerating capacity output in the next period of the current period as the average value of the refrigerating capacities output in the first i periods of the current period. The controlled object parameters are corrected through statistical analysis of refrigerating output, namely, the statistical analysis of refrigerating output of the PID controller is adopted, the inlet temperature state of the water tank is judged according to the standard deviation of the refrigerating output, and meanwhile, the output of actual refrigerating output is corrected, so that the high-precision temperature control requirements of a high-low temperature section wide temperature area and a no-load state are met.
Description
Technical Field
The invention relates to the technical field of semiconductor manufacturing, in particular to a temperature control method and a temperature control system of a heat exchanger.
Background
The heat exchanger temperature control system is used for providing a stable flow and a stable temperature of circulating liquid in the integrated circuit manufacturing process. The equipment mainly refrigerates and supplementally heats in the actual process, has higher requirements on the temperature control precision in the no-load and load states, and simultaneously needs to consider the energy consumption efficiency of the whole equipment.
Disclosure of Invention
The invention provides a temperature control method and a temperature control system of a heat exchanger, which are used for solving the defect that the temperature control precision of the temperature control system of the heat exchanger in the prior art in no-load and load states is difficult to meet the requirement, and realizing the effect of meeting the load capacity at 20 ℃ and the high-precision temperature control requirement of a high-low temperature section wide temperature area and a no-load state.
The invention provides a temperature control method of a heat exchanger, which comprises the following steps:
acquiring the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period;
determining that the standard deviation of the refrigerating capacity is smaller than or equal to a first threshold value;
determining that the refrigerating capacity output in the current period is greater than or equal to the difference between the average refrigerating capacity and the second threshold and is less than or equal to the sum of the average refrigerating capacity and the second threshold;
and setting the refrigerating capacity output in the next period of the current period as the average value of the refrigerating capacities output in the first i periods of the current period.
According to the temperature control method of the heat exchanger provided by the invention, the average value of the refrigerating capacity output in the first i periods is obtained in the nth period
And Cn is the refrigerating capacity output in the nth period.
According to the temperature control method of the heat exchanger provided by the invention, the standard deviation of the refrigerating capacity output by the first i periods is obtained in the nth period
According to the temperature control method of the heat exchanger provided by the invention, the second threshold value c is b multiplied by sigma n And b is the correction coefficient of the standard deviation of the refrigerating capacity.
According to the temperature control method of the heat exchanger provided by the invention, under the condition that the refrigerating capacity output in the next period of the current period is the average value of the refrigerating capacities output in the first i periods of the current period, the integral coefficient and the differential coefficient in the PID parameter are changed from original to 0.
The invention provides a temperature control method of a heat exchanger, which further comprises the following steps:
determining that the refrigerating capacity output in the current period is smaller than the difference between the average refrigerating capacity and a second threshold value or larger than the sum of the average refrigerating capacity and the second threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
The invention provides a temperature control method of a heat exchanger, which further comprises the following steps:
determining that the standard deviation of the refrigerating capacity output in the first i periods of the current period is greater than a first threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
According to the temperature control method of the heat exchanger provided by the invention, under the condition that the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period, the integral coefficient and the differential coefficient in the PID parameter are original parameters.
According to the temperature control method of the heat exchanger provided by the invention, before the step of obtaining the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period, the method further comprises the following steps:
starting a PID controller according to the inlet temperature of the water tank and the inlet target temperature;
and recording the refrigerating capacity output in each period.
The invention also provides a temperature control system for controlling temperature by applying the temperature control method of the heat exchanger, which comprises the heat exchanger, a water tank and a pump body, wherein a heat absorption passage of the heat exchanger is communicated with a refrigeration system to form a refrigeration loop, a heat release passage of the heat exchanger, the water tank, the pump body and a load are communicated to form a circulation loop, a first temperature sensor is arranged at an inlet of the water tank, and an electric two-way valve is arranged at an inlet of the heat absorption passage of the heat exchanger.
According to the temperature control method of the heat exchanger, the PID controller outputs the refrigerating capacity correspondingly according to the inlet temperature and the inlet target temperature of the water tank on the circulation loop, the opening value of the electric two-way valve on the refrigerating loop is further controlled, the refrigerating capacity and the opening value are in a proportional relation, and the range of the refrigerating capacity and the opening value is 0-100. When the refrigerating capacity output in the next period is determined, the current refrigerating capacity is obtainedAverage value CA of refrigerating capacity output in i periods before period n And standard deviation of refrigerating capacity sigma n The corresponding 1 st cycle output refrigerating capacity is C 1 And the output refrigerating capacity of the nth period is C n Setting the refrigerating capacity output in the next period as C Output of After the PID controller operates, in each period after i periods, continuously calculating to obtain the average value CA of the refrigerating capacity output in the previous i periods n And standard deviation of refrigerating capacity sigma n When the refrigerating capacity is in a constant fluctuation state and the inlet temperature of the water tank is closer to the inlet target temperature of the water tank, the PID controller gradually and converged the output control of the refrigerating capacity, sets a first threshold value a, and judges sigma n After a is less than or equal to a, judging the refrigerating capacity C output in the current period n Average value CA of refrigerating capacity output in the previous i periods of the current period n And the second threshold value c is CA n -c≤C n ≤CA n + C when C n Cumulative time t satisfying the above relationship 1 When the refrigerating capacity is multiplied by the t, the refrigerating capacity output tends to be stable, and in order to avoid that the temperature control precision exceeds +/-0.1 ℃ due to the tiny fluctuation of the refrigerating capacity, the refrigerating capacity at the beginning of the next period is corrected to be the average value CA of the refrigerating capacity output in the previous i period of the current period n I.e. C Output of ＝CA n . Therefore, the opening degree of the electric two-way valve is controlled by the refrigerating capacity output in the next period, the flow of the refrigerant passing through the heat absorption passage of the heat exchanger is controlled, and the temperature of the circulating liquid flowing out of the heat release passage of the heat exchanger and entering the water tank is further controlled.
The temperature control system designed by the temperature control method of the heat exchanger has simple structure and strong load capacity, and is a control method of the heat exchanger with wide temperature range. The inlet temperature of the water tank is controlled by controlling the flow of the plant water at the PCW side through the electric two-way valve, and the load capacity at 20 ℃ is met. The controlled object parameters are corrected through statistical analysis of refrigerating output, namely, the statistical analysis of refrigerating output of a PID controller is carried out, the temperature state of the inlet of a water tank is judged according to the standard difference of the refrigerating output, and meanwhile, the output of actual refrigerating output is corrected, so that the high-precision temperature control requirements of a high-temperature section, a low-temperature section, a wide-temperature section and a no-load state are met, the heat exchange device meets the temperature range of 20-90 ℃, and meanwhile, the refrigerating capacity of 20 ℃ is high.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method for controlling the temperature of a heat exchanger according to the present invention;
fig. 2 is a schematic structural diagram of a temperature control system provided by the present invention.
Reference numerals:
100: a heat exchanger; 200: a water tank; 300: a pump body; 400: a load; 500: a first temperature sensor; 600: an electric two-way valve; 700: a second temperature sensor; 800: a third temperature sensor; 900: a flow sensor; 210: a heater.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1 and fig. 2, a temperature control method for a heat exchanger according to an embodiment of the present invention includes:
acquiring the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period;
determining that the standard deviation of the refrigerating capacity is smaller than or equal to a first threshold value;
determining that the refrigerating capacity output in the current period is greater than or equal to the difference between the average refrigerating capacity and the second threshold and is less than or equal to the sum of the average refrigerating capacity and the second threshold;
and setting the refrigerating capacity output in the next period of the current period as the average value of the refrigerating capacities output in the first i periods of the current period.
According to the temperature control method of the heat exchanger, the PID controller outputs the refrigerating capacity correspondingly according to the inlet temperature and the inlet target temperature of the water tank 200 on the circulation loop, the opening value of the electric two-way valve 600 on the refrigerating loop is further controlled, the refrigerating capacity and the opening value are in a proportional relation, and the range of the refrigerating capacity and the opening value is 0-100. When the refrigerating capacity output in the next period is determined, the average value CA of the refrigerating capacity output in i periods before the current period is obtained n And standard deviation of refrigerating capacity sigma n The corresponding 1 st cycle output refrigerating capacity is C 1 The nth cycle outputs refrigerating capacity C n Setting the refrigerating capacity output in the next period as C Output of After the PID controller operates, in each period after i periods, continuously calculating to obtain the average value CA of the refrigerating capacity output in the previous i periods n And standard deviation of refrigerating capacity sigma n When the cooling capacity is in a constant fluctuation state and the inlet temperature of the water tank 200 and the inlet target temperature of the water tank 200 are closer to each other, the PID controller sets the first threshold value a to make the output control of the cooling capacity more gradual and convergent, and judges the sigma n After a is less than or equal to a, judging the refrigerating capacity C output in the current period n Average value CA of refrigerating capacity output in the previous i periods of the current period n And the second threshold value c is CA n -c≤C n ≤CA n + C when C n The cumulative time t satisfying the above relationship 1 When the refrigerating capacity is multiplied by the t, the refrigerating capacity output tends to be stable, and in order to avoid that the temperature control precision exceeds +/-0.1 ℃ due to the tiny fluctuation of the refrigerating capacity, the refrigerating capacity at the beginning of the next period is corrected to be the average value CA of the refrigerating capacity output in the previous i period of the current period n I.e. C Output of ＝CA n . Thereby controlling the opening degree of the electric two-way valve 600 by the cooling capacity outputted in the next cycle, controlling the flow rate of the refrigerant passing through the heat absorbing path of the heat exchanger 100, and further controlling the temperature of the circulation liquid flowing out of the heat releasing path of the heat exchanger 100 into the water tank 200.
The temperature control system designed by the temperature control method of the heat exchanger has simple structure and strong load capacity, and is a control method of the heat exchanger 100 with wide temperature range. The inlet temperature of the flow control water tank 200 of the plant water is controlled at the PCW side through the electric two-way valve 600, and the load capacity at 20 ℃ is satisfied. The parameters of the controlled object are corrected through statistical analysis of refrigerating output, namely, the inlet temperature state of the water tank 200 is judged according to the standard deviation of the refrigerating output through statistical analysis of the refrigerating output of the PID controller, and the output of the actual refrigerating output is corrected at the same time, so that the high-precision temperature control requirements of a high-temperature section, a low-temperature section, a wide-temperature section and a no-load state are met, the heat exchange device meets the temperature range of 20-90 ℃, and has stronger refrigerating capacity at 20 ℃.
According to one embodiment of the invention, the average value of the refrigerating capacity output in the first i periods acquired in the nth period
And Cn is the refrigerating capacity output in the nth period.
In this embodiment, the cooling capacity is statistically analyzed in units of a period T, where T is i × T. Correspondingly, in the nth period, namely the current period, the average value CA of the refrigerating capacity output in the previous i periods can be obtained n 。
According to one embodiment of the invention, the standard deviation of the refrigerating capacity output in the first i periods acquired in the nth period is adopted
In this embodiment, the average value CA of the cooling capacity output according to the first i cycles of the nth cycle n The standard deviation sigma of the refrigerating output can be obtained n 。
According to an embodiment of the present invention, the second threshold c ═ b × σ n And b is the correction coefficient of the standard deviation of the refrigerating capacity. In this embodiment, the second threshold is a standard deviation σ of the cooling capacity n The product of the correction coefficient of standard deviation of refrigerating capacity, i.e. standard deviation of refrigerating capacity sigma output in the first i cycles of the current cycle n Average value CA of refrigerating output in the first i periods n The relationship between the output capacity of the compressor and the output capacity of the current period is CA n -b×σ n ≤C n ≤CA n +b×σ n ，
According to one embodiment provided by the invention, under the condition that the refrigerating capacity output in the next period of the current period is the average value of the refrigerating capacities output in the first i periods of the current period, the integral coefficient and the differential coefficient in the PID parameter are modified from original values to 0. In this embodiment, the refrigerating capacity C output in the next cycle of the current cycle Output of ＝CA n In order to avoid continuous correction of the integral coefficient I and the differential coefficient D in the PID parameters to the refrigerating capacity, the integral coefficient I and the differential coefficient D are modified to be 0.
According to an embodiment of the present invention, the method for controlling the temperature of a heat exchanger further includes:
determining that the refrigerating capacity output in the current period is smaller than the difference between the average refrigerating capacity and a second threshold value or larger than the sum of the average refrigerating capacity and the second threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
In this embodiment, the first threshold a is set to determine the cooling capacity output in the previous i-cycle of the current cycleStandard deviation sigma n After a is less than or equal to a, judging the refrigerating capacity C output in the current period n Average value CA of refrigerating capacity output in the previous i periods of the current period n And standard deviation sigma of refrigerating capacity output in the previous i period of the current period n The relationship between is C n <CA n -b×σ n Or C n >CA n +b×σ n The refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period, namely C Output of ＝C n I.e. when C n When the fluctuation range of the refrigerant exceeds the range of the standard deviation, the next period maintains the refrigerating capacity output in the current period, and the temperature control requirement is met.
According to an embodiment of the present invention, the method for controlling the temperature of a heat exchanger further includes:
determining that the standard deviation of the refrigerating capacity output in the first i periods of the current period is greater than a first threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
In this embodiment, when the deviation between the inlet temperature of the water tank 200 and the inlet target temperature becomes large, the cooling capacity continuously changes, and at this time, the standard deviation σ of the cooling capacity output in the first i periods of the current period is determined n If the refrigerating capacity is more than a, the refrigerating capacity which is output corresponding to the next period of the current period is recovered to the refrigerating capacity which is output in the current period, namely C Output of ＝C n And the requirement of normal temperature control is met.
According to an embodiment provided by the invention, under the condition that the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period, the integral coefficient and the differential coefficient in the PID parameter are original parameters. In this embodiment, when the cooling capacity output in the next cycle of the current cycle is recovered to C Output the output ＝C n And restoring the integral coefficient I and the differential coefficient D in the PID parameters to the original parameters.
According to an embodiment provided by the present invention, before the step of obtaining the average value and standard deviation of the cooling capacity output in the first i periods of the current period, the method further includes:
starting a PID controller according to the inlet temperature and the inlet target temperature of the water tank 200;
and recording the refrigerating capacity output in each period.
In the present embodiment, the temperature of the circulation fluid flowing into the tank 200 after flowing through the heat exchanger 100 on the circulation circuit is detected by a temperature sensor as the inlet temperature of the tank 200, and the start of the PID controller is controlled by comparison and determination with the set inlet target temperature SV of the tank 200. After the PID controller is started, the refrigerating capacity output by the PID is recorded in a fixed period t, and then the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period are obtained to carry out temperature control adjustment.
As shown in fig. 2, an embodiment of the present invention further provides a temperature control system for controlling temperature by applying the temperature control method of the heat exchanger according to the above embodiment, including a heat exchanger 100, a water tank 200, and a pump body 300, wherein a heat absorption path of the heat exchanger 100 is used for communicating with a refrigeration system to form a refrigeration circuit, a heat release path of the heat exchanger 100, the water tank 200, the pump body 300, and a load 400 are communicated to form a circulation circuit, a first temperature sensor 500 is disposed at an inlet of the water tank 200, and an electric two-way valve 600 is disposed at an inlet of the heat absorption path of the heat exchanger 100.
In the temperature control system according to the embodiment of the present invention, the refrigerant flows through the refrigeration circuit, the circulation fluid flows through the circulation circuit, the refrigeration system is a plant cooling water system, and the electric two-way valve 600 controls the flow rate of the refrigerant entering the heat absorption path of the heat exchanger 100 on the refrigeration circuit, thereby controlling the output of the refrigeration capacity. The heat exchanger 100 is an evaporator, a heater 210 is arranged in the water tank 200, a circulating liquid in the water tank 200 is pumped into the load 400 by the pump body 300, a first temperature sensor 500 is arranged on a pipeline of a heat release passage of the heat exchanger 100 communicated with an inlet of the water tank 200, a second temperature sensor 700 is arranged on a pipeline of the load 400 communicated with the heat release passage of the heat exchanger 100, a third temperature sensor 800 is arranged on a pipeline of the pump body 300 communicated with the load 400, and a flow sensor 900 is arranged on a pipeline behind the third temperature sensor 800.
The electric two-way valve 600 controls the plant water as a refrigerant to exchange heat with the circulating liquid flowing into the evaporator in the circulating loop in the evaporator, and the circulating liquid is cooled. The main device is connected outside the circulation loop, the return temperature of the evaporator is increased when the main device performs a process, the inlet temperature of the water tank 200 is controlled to fluctuate at a certain temperature, the heater 210 controls the outlet temperature of the water tank 200 to be stabilized at a given target temperature, and the temperature control precision of the outlet temperature is ensured. The first temperature sensor 500 is used to detect the inlet temperature of the water tank 200, and the second temperature sensor 700 is used to detect the return temperature of the heat release path of the heat exchanger 100.
In this embodiment, in order to satisfy the requirement that the temperature control system has a strong refrigerating capacity at 20 ℃, and considering the economy of the device, the electric two-way valve 600 may be a conventional ball valve, and the model selection specification needs to be correspondingly enlarged. The control precision of the conventional ball valve is low, and the whole range is 1% -2%. The output of the refrigerating capacity is larger at the low-temperature section, the temperature control precision of no-load and load 400 can be met, the refrigerating capacity required to be output at the no-load is very small at the high-temperature section, and the control precision of the ball valve is difficult to meet the temperature control precision of +/-0.1 ℃, so the inlet temperature of the flow control water tank 200 of the factory service water is controlled at the PCW side through the electric two-way valve 600, and the load capacity at 20 ℃ is met. The controlled object parameters are corrected through statistical analysis of refrigerating output, namely, the statistical analysis of refrigerating output of a PID controller is carried out, the temperature state of the inlet of the water tank 200 is judged according to the standard deviation of the refrigerating output, and meanwhile, the output of actual refrigerating output is corrected, so that the high-precision temperature control requirements of a high-temperature section, a low-temperature section, a wide-temperature section and a no-load state are met, the heat exchange device meets the temperature range of 20-90 ℃, and meanwhile, the refrigerating capacity of 20 ℃ is high.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A temperature control method of a heat exchanger is characterized by comprising the following steps: the method comprises the following steps:
acquiring the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period;
determining that the standard deviation of the refrigerating capacity is smaller than or equal to a first threshold value;
determining that the refrigerating capacity output in the current period is greater than or equal to the difference between the average refrigerating capacity and the second threshold and is less than or equal to the sum of the average refrigerating capacity and the second threshold; the second threshold value is the product of the standard deviation of the refrigerating capacity and the correction coefficient of the standard deviation of the refrigerating capacity;
and setting the refrigerating capacity output in the next period of the current period as the average value of the refrigerating capacities output in the first i periods of the current period.
2. The method of controlling the temperature of a heat exchanger according to claim 1, wherein: the average value of the refrigerating capacity output in the first i periods acquired in the nth period
And Cn is the refrigerating capacity output in the nth period.
3. The method of controlling the temperature of a heat exchanger according to claim 2, wherein: standard deviation of refrigerating output of the first i periods acquired in the nth period
4. The method of controlling the temperature of a heat exchanger according to claim 1, wherein: and under the condition that the refrigerating capacity output in the next period of the current period is the average value of the refrigerating capacities output in the first i periods of the current period, the integral coefficient and the differential coefficient in the PID parameter are originally modified to be 0.
5. The method of controlling the temperature of a heat exchanger according to claim 1, wherein: further comprising:
determining that the refrigerating capacity output in the current period is smaller than the difference between the average refrigerating capacity and a second threshold value or larger than the sum of the average refrigerating capacity and the second threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
6. The method for temperature control of a heat exchanger according to any one of claims 1 to 5, wherein: further comprising:
determining that the standard deviation of the refrigerating capacity output in the first i periods of the current period is greater than a first threshold value;
the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period.
7. The method of controlling temperature of a heat exchanger of claim 6, wherein: and under the condition that the refrigerating capacity output in the next period of the current period is the refrigerating capacity output in the current period, the integral coefficient and the differential coefficient in the PID parameter are original parameters.
8. The method of controlling the temperature of a heat exchanger according to claim 1, wherein: before the step of obtaining the average value and standard deviation of the refrigerating capacity output in the first i periods of the current period, the method further comprises the following steps:
starting a PID controller according to the inlet temperature of the water tank and the inlet target temperature;
and recording the refrigerating capacity output in each period.
9. A temperature control system for controlling temperature by the method of controlling temperature of a heat exchanger according to any one of claims 1 to 8, wherein: the heat pump type refrigerating system comprises a heat exchanger, a water tank and a pump body, wherein a heat absorption passage of the heat exchanger is communicated with a refrigerating system to form a refrigerating circuit, a heat release passage of the heat exchanger, the water tank, the pump body and a load are communicated to form a circulating circuit, a first temperature sensor is arranged at an inlet of the water tank, and an electric two-way valve is arranged at an inlet of the heat absorption passage of the heat exchanger.
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