CN115542980A - Control method and device for temperature control box and temperature control box - Google Patents

Control method and device for temperature control box and temperature control box Download PDF

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Publication number
CN115542980A
CN115542980A CN202110815374.9A CN202110815374A CN115542980A CN 115542980 A CN115542980 A CN 115542980A CN 202110815374 A CN202110815374 A CN 202110815374A CN 115542980 A CN115542980 A CN 115542980A
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China
Prior art keywords
temperature
output power
heating
refrigerating
control box
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CN202110815374.9A
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Chinese (zh)
Inventor
刘占杰
夏元通
王毅
郑文东
许博
戴本银
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Qingdao Haier Biomedical Co Ltd
Qingdao Haite Biomedical Co Ltd
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Qingdao Haier Biomedical Co Ltd
Qingdao Haite Biomedical Co Ltd
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Priority to CN202110815374.9A priority Critical patent/CN115542980A/en
Publication of CN115542980A publication Critical patent/CN115542980A/en
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    • G—PHYSICS
    • 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
    • G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The application relates to the technical field of temperature control, and discloses a control method for a temperature control box, wherein the temperature control box comprises a refrigerating system and a heating system, and the control method comprises the following steps: under the condition that the temperature in the temperature control box meets a stable condition, acquiring the refrigerating output power of a refrigerating system and the heating output power of a heating system; and under the condition that the heating output power is smaller than the heating power threshold value or the refrigerating output power is smaller than the refrigerating power threshold value, keeping the refrigerating system to operate according to the refrigerating output power, and keeping the heating system to operate according to the heating output power. The temperature regulation effect of the temperature control box is guaranteed, the temperature in the box is stable, and the power consumption of the system is reduced. The application also discloses a controlling means, accuse temperature case for accuse temperature case.

Description

Control method and device for temperature control box and temperature control box
Technical Field
The present application relates to the field of temperature control technologies, and for example, to a control method and apparatus for a temperature control box, and a temperature control box.
Background
A cross-ring temperature control incubator comprises a case body, a circulating fan, a heating system, a refrigerating system, a control system and the like, and mainly realizes temperature adjustment in the case body through refrigeration, heating and the matching control of refrigeration and heating. Generally, under the condition that the temperature in a trans-loop temperature control box deviates from a target temperature greatly, the refrigeration or heating temperature regulation is easy to automatically judge and execute, so that the stable control of the temperature is realized; however, when the temperature in the cabinet is close to the target temperature, since the refrigeration system and the heating system that can simultaneously operate are provided at the same time, it is difficult to determine the operation modes of the refrigeration system and the heating system, and the temperature stability is poor.
In the related art, the refrigeration system is controlled to keep running under the condition that the temperature in the box is higher than the target temperature, and the heating output power is adjusted to compensate the temperature in the box by detecting the difference value between the temperature in the box and the target temperature, so that the temperature fluctuation caused by frequent start and stop of a press of the refrigeration system is avoided, and the control difficulty of the temperature in the box is reduced.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the related art, a refrigeration system is controlled to keep constant power operation, and a heating system is used for temperature compensation in a temperature regulation mode, so that the energy consumption is high.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and device for a temperature control box and the temperature control box, so that when a refrigeration system and a heating system are operated simultaneously in the temperature control box for temperature adjustment, the energy consumption for system operation is reduced.
In some embodiments, the temperature control box comprises a refrigeration system and a heating system, and the control method for the temperature control box comprises the following steps: under the condition that the temperature in the temperature control box meets a stable condition, obtaining the refrigerating output power of the refrigerating system and the heating output power of the heating system; and under the condition that the heating output power is smaller than a heating power threshold value or the refrigerating output power is smaller than a refrigerating power threshold value, keeping the refrigerating system to operate according to the refrigerating output power, and keeping the heating system to operate according to the heating output power.
In some embodiments, the control device for a temperature control box comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for the temperature control box when the program instructions are executed.
In some embodiments, the temperature control box comprises the control device for the temperature control box.
The control method and device for the temperature control box and the temperature control box provided by the embodiment of the disclosure can realize the following technical effects:
under the condition that the temperature in the temperature control box meets the stable condition, the heating output power is smaller than the heating power threshold value, or the refrigerating output power is smaller than the refrigerating power threshold value, the temperature in the temperature control box is stable at the moment, the temperature control purpose can be met, the refrigerating system and the heating system are both kept on the minimum output power, and the overall energy consumption of the system is low. In addition, when the refrigerating system and the heating system are simultaneously and stably operated, the temperature fluctuation can be mutually inhibited, and the fluctuation degree can be reduced. Therefore, the temperature control box keeps the current refrigeration output power and the current heating output power to operate, and the energy consumption of the system is reduced on the basis of ensuring the temperature regulation effect of the temperature control box.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a module relationship of a temperature control box according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart diagram illustrating a control method for a temperature control box according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram illustrating another control method for a temperature control box according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart diagram illustrating another control method for a temperature control box according to an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart diagram illustrating another control method for a temperature control box according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a control device for a temperature control box according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for convenience of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
Fig. 1 is a schematic diagram of a module relationship of a temperature control box provided in the embodiment of the present disclosure. The temperature controlled box includes a control system 11, a refrigeration system 12, and a heating system 13.
The refrigeration system 12 is used to cool and regulate the temperature in the temperature-controlled cabinet. The refrigerating system can be a compression refrigerating system and comprises a compressor, a condenser, a throttling element and an evaporator which are sequentially connected to form a closed system, and a refrigerant circularly flows in the refrigerating system and exchanges heat with the outside, so that the temperature in the temperature control box is reduced. In other embodiments, the refrigeration system may also be an electronic refrigeration system, and includes a semiconductor refrigeration sheet and a power supply, and the cold energy is released from the cold end of the semiconductor refrigeration sheet in the power-on state, thereby reducing the temperature in the temperature control box.
And the heating system 13 is used for realizing temperature rise adjustment (temperature compensation) of the temperature in the temperature control box. The heating system may be an electrical heating system, such as a resistive heating system, an inductive heating system, an arc heating system, an infrared heating system, or the like. In this embodiment, in order to realize control of the heating output, a resistance heating device is used as the heating system. The resistance heating system comprises a power supply and a resistor body, and the temperature in the temperature control box is improved by the heat effect generated by the resistor body when the power supply is in a power-on state.
And the control system 11 is respectively connected with the refrigerating system 12 and the heating system 13 and is used for adjusting the output power of the refrigerating system and the heating system. Taking the refrigeration system 12 as a compression refrigeration system and the heating system 13 as a resistance heating system as an example, the control system 11 adjusts the compressor or throttling element of the refrigeration system 12 and the power supply of the resistance heating system, thereby realizing the adjustment of the refrigeration output power and the heating output power.
Fig. 2 is a schematic flowchart of a control method for a temperature control box according to an embodiment of the present disclosure. The control method for the temperature control box is applied to the temperature control box shown in figure 1 and can be executed at a control system end of the temperature control box.
Referring to fig. 2, the control method for the temperature control box includes:
step S201, under the condition that the temperature in the temperature control box meets the stable condition, the control system obtains the refrigerating output power of the refrigerating system and the heating output power of the heating system.
And a stable condition for indicating a case where the temperature in the cabinet is close to the target temperature and is maintained within a small fluctuation range.
The refrigeration output power refers to a parameter related to the refrigeration capacity output by the refrigeration system. In this embodiment, the corresponding refrigeration output power is determined by a proportional-Integral-derivative (PID) controller of the refrigeration system based on the difference between the temperature in the cabinet and the target temperature.
Heating output power refers to a parameter related to the amount of heat output by the heating system. The heating power control method can be used for obtaining the heating power according to the output current and the power-on time of a power supply of the heating system, and can also be used for determining the corresponding heating output power through a PID (proportion integration differentiation) controller of the heating system according to the difference value between the temperature in the box and the target temperature.
After the temperature of the temperature control box is adjusted, the refrigerating system and the heating system respectively output cold quantity and heat quantity independently under the action of a PID controller of the refrigerating system and a PID controller of the heating system according to the difference condition of the target temperature and the temperature in the temperature control box, the temperature in the temperature control box is adjusted, when the temperature in the box is close to the target temperature, the heating system and the refrigerating system run simultaneously, the temperature fluctuation can be mutually inhibited, the temperature fluctuation range is reduced, and the temperature in the box meets the stable condition.
And S202, under the condition that the heating output power is smaller than the heating power threshold value or the refrigerating output power is smaller than the refrigerating power threshold value, the control system keeps the refrigerating system to operate according to the refrigerating output power and keeps the heating system to operate according to the heating output power.
The heating power threshold is used for representing the condition that the output power of the current heating system meets the low-power-consumption operation requirement; the refrigeration power threshold is used to indicate that the output power of the current refrigeration system meets the low power consumption operation requirement. Optionally, in this embodiment, the heating power threshold is 1% of the rated power of the heating system, and the cooling power threshold is 1% of the rated power of the cooling system.
When the temperature in the box is kept stable relative to the target temperature and the numerical value of the heating output power or the cooling output power meets the low-power operation requirement, the current heating system and the current cooling system are both kept in a low-power output state, and the system power consumption is low.
By adopting the control method for the temperature control box provided by the embodiment of the disclosure, under the condition that the temperature in the temperature control box meets the stable condition and the heating output power is smaller than the heating power threshold or the refrigerating output power is smaller than the refrigerating power threshold, the temperature in the temperature control box is stable at the moment, the temperature control purpose can be met, and the refrigerating system and the heating system are both kept on the minimum output power, so that the overall energy consumption of the system is low. In addition, when the refrigerating system and the heating system are simultaneously and stably operated, the temperature fluctuation can be mutually inhibited, and the fluctuation degree is reduced. Therefore, the temperature control box keeps the current refrigeration output power and the current heating output power to operate, and the energy consumption of the system is reduced on the basis of ensuring the temperature regulation effect of the temperature control box.
Optionally, stabilizing conditions comprising: within the set time length, the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is smaller than a first temperature difference threshold value.
And setting time and a first temperature difference threshold value for representing the condition that the temperature in the box reaches a stable state. Whether the temperature in the temperature control box satisfies the above-described stable condition may be determined by providing a temperature detection element and a timing element in the temperature control box.
In some embodiments, the difference between the temperature in the plurality of temperature control boxes and the target temperature within the set time length can be obtained; and if the absolute values of the temperature difference values are smaller than the first set temperature difference, determining that the temperature in the temperature control box meets the stable condition.
In some embodiments, the temperature in the plurality of temperature control boxes within a set time period can be obtained, and the maximum value and the minimum value of the temperature in the plurality of temperature control boxes are determined; and under the condition that the absolute value of the temperature difference value between the maximum value and the target temperature is smaller than a first set temperature difference and the absolute value of the temperature difference value between the minimum value and the target temperature is smaller than the first set temperature difference, determining that the temperature in the temperature control box meets a stable condition.
Alternatively, the set time duration is 60s, and the first set temperature difference is 0.2 ℃. Then, when the temperature in the temperature control box satisfies the following conditions within 60s, the temperature in the temperature control box is considered to satisfy the stable conditions:
|T 0 -T S |＜0.2
wherein, T 0 For controlling the temperature, T, in the oven s Is the target temperature.
Therefore, the temperature in the temperature control box meets the stable condition, and the refrigerating output power or the heating output power is smaller than the preset power, so that the temperature in the temperature control box is stable at the moment, the temperature control purpose can be met, the refrigerating system and the heating system are both kept on the minimum output power, and the overall power consumption of the system is small.
Fig. 3 is a schematic flow chart of another control method for a temperature control box according to an embodiment of the present disclosure. The control method for the temperature control box is applied to the temperature control box shown in figure 1 and can be executed in a control system of the temperature control box.
Referring to fig. 3, the control method for the temperature control box includes:
step S201, under the condition that the temperature in the temperature control box meets the stable condition, the control system obtains the refrigerating output power of the refrigerating system and the heating output power of the heating system.
And step S302, under the condition that the heating output power is smaller than the heating power threshold value, the control system keeps the refrigeration system running according to the refrigeration output power, and keeps the heating system running according to the heating output power.
And step S303, reducing the output power of the refrigerating system and the output power of the heating system under the condition that the heating output power is greater than or equal to the heating power threshold value.
Here, when the temperature in the temperature-controlled box reaches near the target temperature, the heating system and the refrigeration system suppress temperature fluctuation from each other by independently outputting power, and the fluctuation degree of the temperature in the temperature-controlled box is reduced, so that the temperature in the temperature-controlled box satisfies a stable condition. In this case, if it is detected that the output power of the heating system is greater than the heating power threshold, it is indicated that the power consumption of the system for maintaining the temperature stability is large, and the system energy consumption should be reduced by reducing the output power.
In the temperature adjusting process of the temperature control box, when the temperature in the temperature control box is close to the target temperature and is kept stable, the power consumption is reduced by actively reducing the output of refrigerating or heating output power; at this time, in order to maintain the temperature in the refrigerator stable, the output power is reduced due to a change in the difference between the temperature in the refrigerator and the target temperature as the heating or cooling output power from the momentum. In the present embodiment, the refrigeration output of the refrigeration system is actively reduced as an example.
Optionally, reducing the output of the refrigeration system and the output of the heating system comprises: reducing the output power of the refrigeration system at a first rate; and reducing the output power of the heating system according to the temperature difference between the temperature in the temperature control box and the target temperature after the output power of the refrigerating system is reduced.
Here, the output power of the refrigeration system can be reduced by reducing the refrigerating capacity output by the refrigeration system, such as adjusting the frequency of the compressor, or the opening degree of the throttling element; the effect of reducing the output power can also be achieved by reducing the output value in the PID controller of the refrigeration system.
Optionally, the control method further includes: detecting the temperature in the temperature control box in the process of reducing the output power of the refrigerating system and the output power of the heating system; and under the condition that the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold value, stopping reducing the output power of the refrigerating system and the output power of the heating system.
Here, the second temperature difference threshold is used to indicate that the fluctuation range of the temperature in the refrigerator is small in the output power down-regulation process of the refrigeration system, and the temperature stability requirement can be satisfied. In general, the second temperature difference threshold may have a value greater than or equal to the first temperature difference threshold. In the process of reducing the output power of the refrigerating system, the temperature in the box is deviated upwards along with the reduction of the refrigerating power, so that a PID (proportion integration differentiation) controller of the heating system can output new target power of the heating system according to the difference value between the temperature in the box and the target temperature, and the output power of the heating system is reduced.
When the absolute value of the temperature difference between the temperature in the box and the target temperature is smaller than or equal to the second temperature threshold, the fluctuation range of the temperature in the box is smaller and does not exceed the set range in the output power down-regulation process of the refrigerating system, so that the down-regulation of the output power of the refrigerating system can be continuously executed, the acquired reduced output power of the heating system is compared with the heating power threshold, and the control system keeps the current output power of the heating system to operate and keeps the current output power of the refrigerating system to operate under the condition that the output power of the heating system is smaller than the heating power threshold.
And when the absolute value of the temperature difference between the temperature in the box and the target temperature is greater than the second temperature threshold, the temperature in the temperature control box is increased greatly, and the output power of the refrigerating system and the output power of the heating system are stopped from being reduced at the moment, so that the temperature increase amplitude is prevented from being increased continuously.
Optionally, the second temperature difference threshold is 0.3 ℃. Then, the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than the second temperature difference threshold, which can be expressed as:
|T 1 -T S |＞0.3
wherein, T 1 For obtaining the temperature, T, in the temperature-controlled box during the process of reducing the output power of the refrigerating system and the heating system s Is the target temperature.
Optionally, after stopping reducing the output power of the refrigeration system and the output power of the heating system, the method further includes:
acquiring and maintaining the output power of the refrigerating system and the output power of the heating system before the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold; acquiring the temperature in a new temperature control box; under the condition that the temperature difference between the temperature in the new temperature control box and the target temperature is smaller than or equal to a second temperature difference threshold value, reducing the reduction rate of the output power of the refrigeration system; and reducing the output power of the refrigerating system according to the reduced speed.
Here, the output power of the refrigeration system and the output power of the heating system before the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than the second temperature difference threshold means the output power of the refrigeration system and the output power of the heating system at the time of the last reduction adjustment in which the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is less than or equal to the second temperature difference threshold in the reduction process of the output power.
In addition, after the output power of the refrigerating system and the output power of the heating system before the absolute value of the temperature difference is greater than the second temperature difference threshold are obtained, the control system enables the refrigerating system and the heating system to respectively keep the power running, namely the output power is not actively reduced any more, PID adjustment is carried out according to the temperature difference, and the output powers of the refrigerating system and the heating system are further adjusted on the basis of the power, so that the temperature in the temperature control box is kept stable, or the temperature recovery speed is accelerated.
And continuously reducing the output power of the refrigerating system and the output power of the heating system in the previous step by a small adjustment through acquiring the output power of the refrigerating system and the output power of the heating system before the temperature in the refrigerator exceeds the second temperature difference threshold value. On the one hand, the temperature in the temperature control box is prevented from being greatly changed due to the fact that power is greatly adjusted, and on the other hand, the temperature in the box is stably recovered by keeping the output power of the temperature which is slightly out of the range to operate.
In the case where the absolute value of the temperature difference between the temperature in the new temperature-controlled box and the target temperature is less than or equal to the second temperature difference threshold, it is indicated that the box temperature has recovered within a reasonable range, and therefore, the operations of reducing the output power of the refrigeration system and reducing the output power of the heating system are continuously performed.
Here, in the process of reducing the output power this time, the output power of the refrigeration system may be reduced at the original reduction rate (first rate), or the temperature in the tank may be changed slowly by slowing down (reducing) the reduction rate (first rate) of the output power of the refrigeration system, and the PID controller of the heating system may adjust (reduce) the output power of the heating system in time, thereby reducing the possibility of the occurrence of the situation where the temperature deviation is too large again.
Specifically, the continuously reducing the output power of the refrigerating system and the output power of the heating system comprises the following steps: reducing the reduction rate of the output power of the refrigeration system; and reducing the output power of the refrigerating system according to the reduced speed.
Wherein, the speed of reduction of the output power of the refrigeration system is adjusted down, including: acquiring an adjustment quantity for reducing the output power of the refrigeration system; determining a reduced rate after reduction according to the difference value of the first rate and the regulating quantity; wherein the regulation quantity is from the output power of the refrigeration system to the temperature T in the temperature control box 0 ' with target temperature T s The length of the lowering time for which the absolute value of the temperature difference of (a) is greater than 0.3 is inversely related.
Fig. 4 is a schematic flowchart of a control method for a temperature control box according to an embodiment of the present disclosure. The control method for the temperature control box is applied to the temperature control box shown in figure 1 and can be executed in a control system of the temperature control box. The disclosed embodiments are provided to illustrate a process flow for actively reducing the output power of a refrigeration system.
Referring to fig. 4, the control method for the temperature control box includes:
and step S401, controlling the system to operate a temperature adjusting mode of the temperature control box.
And S402, controlling the PID controller of the refrigerating system and the PID controller of the heating system by the control system to respectively control the output power of the refrigerating system and the output power of the heating system according to the temperature difference between the temperature in the temperature control box and the target temperature.
Step S403, controlling the temperature T in the temperature control box within the set time length of 60S 0 With a target temperature T s Under the condition that the absolute values of the temperature differences are less than 0.2, the control system obtains the refrigeration output power W of the current refrigeration system c And heating output power W of the heating system h 。
Step S404, heating the output power W h Less than a heating power threshold W hs In the case of (2), the control system maintains the refrigeration system at a refrigeration output power W c Operating and maintaining the heating system at a heating output W h And (4) operating.
Step S405, output power W is heated h Greater than or equal to a heating power threshold value W hs In case of (2), the control system follows the first rate k 1 And reducing the output power of the refrigerating system, and reducing the output power of the heating system according to the temperature difference between the temperature in the temperature control box and the target temperature after the output power of the refrigerating system is reduced.
Step S406, the control system detects the temperature T in the temperature control box in the process of reducing the output power of the refrigerating system and the output power of the heating system 0 ’。
Step S407, controlling the temperature T of the system in the temperature control box 0 ' with target temperature T s When the temperature difference (W) is less than or equal to 0.3, the output W of the heating system is decreased c ' less than heating Power threshold W cs Then the control system keeps the refrigerating system at the refrigerating output power W c ' run and maintain the heating system at the current heating output W h ' running; otherwise, returning to step S405, continuing to reduce the output power of the refrigeration system.
Step S408, controlling the temperature T of the system in the temperature control box 0 ' with target temperature T s Is greater than 0.3, the reduction of the output power of the refrigeration system and the output power of the heating system is stopped.
Step S409, the control system obtains the temperature difference between the temperature in the temperature control box and the target temperatureIs greater than the output power W of the refrigeration system before the second temperature difference threshold c "and heating System output Power W h ", and hold; obtaining the temperature T in the new temperature control box 0 ", temperature T in the new temperature-controlled cabinet 0 "with target temperature T s Is less than or equal to 0.3, the process returns to step S405 to continue to decrease the output power of the refrigeration system and the output power of the heating system.
Before continuing to reduce the output power of the refrigeration system and the output power of the heating system, the method further comprises the following steps:
according to a first regulating quantity a, reducing the reducing rate of the output power of the refrigerating system, so that k1= k1-a; and assigning the reduced first speed k1 to step S405, and continuing to reduce the output power of the refrigeration system according to the reduced first speed.
Wherein the first regulating quantity a is started according to the reduction of the output power of the refrigerating system and reaches the temperature T in the temperature control box 0 ' with target temperature T s Is greater than 0.3 for a decreasing period of time. The longer the duration of the reduction period, the smaller the adjustment amount of the first adjustment amount a, and the smaller the difference between the first rate after the reduction and the first rate before the reduction.
Therefore, by adopting the control method for the temperature control box provided by the embodiment of the disclosure, under the condition that the temperature in the temperature control box meets the stable condition and the heating output power is smaller than the heating power threshold value, the temperature in the temperature control box is stable at the moment, the temperature control purpose can be met, the refrigeration system and the heating system are both kept on the minimum output power, the overall energy consumption of the system is small, and the current output power is kept to continuously operate. When the heating output power is larger than or equal to the heating power threshold, the output power of the refrigerating system and the output power of the heating system are reduced, and the reduction rate is adjusted according to the variation range of the temperature in the temperature control box, so that the temperature control box can keep the operation of the refrigerating output power and the heating output power with low energy consumption on the basis of ensuring the temperature control effect.
Fig. 5 is a schematic flow chart of another control method for a temperature control box according to an embodiment of the present disclosure. The control method for the temperature control box is applied to the temperature control box shown in figure 1 and can be executed in a control system of the temperature control box. In the present embodiment, the heating output of the heating system is actively reduced as an example.
Referring to fig. 5, the control method for the temperature control box includes:
step S201, under the condition that the temperature in the temperature control box meets the stable condition, the control system obtains the refrigerating output power of the refrigerating system and the heating output power of the heating system.
And step S502, under the condition that the refrigerating output power is smaller than the refrigerating power threshold value, the control system keeps the refrigerating system running according to the refrigerating output power, and keeps the heating system running according to the heating output power.
And step S503, reducing the output power of the refrigerating system and the output power of the heating system under the condition that the refrigerating output power is greater than or equal to the refrigerating power threshold value.
Optionally, reducing the output of the refrigeration system and the output of the heating system comprises: reducing the output power of the heating system at a second rate; and reducing the output power of the refrigerating system according to the temperature difference between the temperature in the temperature control box and the target temperature after the output power of the heating system is reduced.
Here, reducing the output power of the heating system may be achieved by reducing the heating capacity of the heating system, such as reducing the output current or the power-on duration of the power supply; the effect of reducing the output power can also be achieved by reducing the output value in the PID controller of the heating system.
Optionally, the control method further includes: detecting the temperature in the temperature control box in the process of reducing the output power of the refrigerating system and the output power of the heating system; and under the condition that the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold value, stopping reducing the output power of the refrigerating system and the output power of the heating system.
Here, the second temperature difference threshold is used to indicate that the fluctuation range of the temperature in the tank is small in the output power down-regulation process of the heating system, and the temperature stability requirement can be satisfied. In general, the second temperature difference threshold may have a value greater than or equal to the first temperature difference threshold. In the process of reducing the output power of the heating system, the temperature in the refrigerator deviates downwards along with the reduction of the heating power, so that a PID (proportion integration differentiation) controller of the refrigerating system can output new target power of the refrigerating system according to the difference value between the temperature in the refrigerator and the target temperature, and the output power of the refrigerating system is reduced.
Optionally, after stopping reducing the output power of the refrigeration system and the output power of the heating system, the method further includes:
acquiring and maintaining the output power of the refrigerating system and the output power of the heating system before the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold; acquiring the temperature in the new temperature control box; when the absolute value of the temperature difference between the temperature in the new temperature control box and the target temperature is smaller than or equal to a second temperature difference threshold value, reducing the reduction rate of the output power of the heating system; and reducing the output power of the heating system according to the reduced speed.
In the case where the absolute value of the temperature difference between the temperature in the new temperature control box and the target temperature is less than or equal to the second temperature difference threshold, it indicates that the temperature in the box has recovered within a reasonable range, and thus the operations of reducing the output power of the refrigeration system and reducing the output power of the heating system are continuously performed. In the process of reducing the output power at this time, the output power of the heating system is reduced at the original reduction rate (second rate), and the temperature in the box can be slowly reduced by slowing down (reducing) the reduction speed (second rate) of the output power of the heating system, so that the PID controller of the heating system can timely adjust (reduce) the output power of the heating system, and the possibility of the situation that the deviation in the temperature is too large again is reduced.
Specifically, the continuously reducing the output power of the refrigerating system and the output power of the heating system comprises the following steps: reducing the reduction rate of the output power of the heating system; and reducing the output power of the heating system according to the reduced speed.
Wherein, the heating system is turned downThe rate of decrease of the output power of (1), comprising: acquiring an adjustment quantity for reducing the output power of the heating system; determining the reduced rate after the reduction according to the difference value between the second rate and the adjustment amount; wherein the regulation quantity is from the output power of the heating system to the temperature T in the temperature control box 0 ' with target temperature T s The length of the lowering time for which the absolute value of the temperature difference of (a) is greater than 0.3 is inversely related.
As shown in fig. 6, an embodiment of the present disclosure provides a control device for a temperature control box, which includes a processor (processor) 60 and a memory (memory) 61. Optionally, the apparatus may further include a Communication Interface (Communication Interface) 62 and a bus 63. The processor 60, the communication interface 62 and the memory 61 can communicate with each other through a bus 63. The communication interface 62 may be used for information transfer. The processor 60 may call logic instructions in the memory 61 to execute the control method for the temperature controlled box of the above embodiment.
Furthermore, the logic instructions in the memory 61 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 61 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 60 executes functional applications and data processing by executing program instructions/modules stored in the memory 61, that is, implements the control method for the temperature control box in the above-described embodiment.
The memory 61 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 61 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a temperature control box, which comprises the control device for the temperature control box.
The disclosed embodiments provide a storage medium storing computer-executable instructions configured to perform the above-described control method for a temperature control box.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A control method for a temperature controlled cabinet, wherein the temperature controlled cabinet comprises a refrigeration system and a heating system; the control method comprises the following steps:
under the condition that the temperature in the temperature control box meets a stable condition, acquiring the refrigerating output power of the refrigerating system and the heating output power of the heating system;
and under the condition that the heating output power is smaller than a heating power threshold value or the refrigerating output power is smaller than a refrigerating power threshold value, keeping the refrigerating system to operate according to the refrigerating output power, and keeping the heating system to operate according to the heating output power.
2. The control method according to claim 1, wherein the stable condition includes:
within a set time length, the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is smaller than a first temperature difference threshold.
3. The control method according to claim 1, characterized by further comprising:
reducing the output power of the refrigerating system and the output power of the heating system under the condition that the heating output power is greater than or equal to the heating power threshold; or the like, or a combination thereof,
and reducing the output power of the refrigerating system and the output power of the heating system under the condition that the refrigerating output power is greater than or equal to the refrigerating power threshold value.
4. The control method of claim 3, wherein the reducing the output power of the refrigeration system and the output power of the heating system in the case that the heating output power is greater than or equal to the heating power threshold value comprises:
reducing the output power of the refrigeration system at a first rate;
and reducing the output power of the heating system according to the temperature difference between the temperature in the temperature control box and the target temperature after the output power of the refrigerating system is reduced.
5. The control method of claim 3, wherein the reducing the output power of the refrigeration system and the output power of the heating system in the case that the output power of the refrigeration system is greater than or equal to a refrigeration power threshold value comprises:
reducing the output power of the heating system at a second rate;
and reducing the output power of the refrigerating system according to the temperature difference between the temperature in the temperature control box and the target temperature after the output power of the heating system is reduced.
6. The control method according to any one of claims 3 to 5, characterized by further comprising:
detecting the temperature in the temperature control box in the process of reducing the output power of the refrigerating system and the output power of the heating system;
and under the condition that the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold value, stopping reducing the output power of the refrigerating system and the output power of the heating system.
7. The control method of claim 6, further comprising, after stopping reducing the output of the refrigeration system and the output of the heating system:
acquiring and maintaining the output power of the refrigerating system and the output power of the heating system before the absolute value of the temperature difference between the temperature in the temperature control box and the target temperature is greater than a second temperature difference threshold; acquiring the temperature in a new temperature control box;
and under the condition that the absolute value of the temperature difference between the temperature in the new temperature control box and the target temperature is less than or equal to a second temperature difference threshold value, continuously reducing the output power of the refrigerating system and the output power of the heating system.
8. The control method as set forth in claim 7, wherein said continuously reducing the output power of said refrigerant system and the output power of said heating system comprises:
reducing the reduction rate of the output power of the refrigerating system and/or reducing the reduction rate of the output power of the heating system;
and reducing the output power of the refrigerating system according to the reduced speed, or reducing the output power of the heating system according to the reduced speed.
9. A control device for a temperature controlled cabinet, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for a temperature controlled cabinet according to any one of claims 1 to 8 when executing the program instructions.
10. A temperature control cabinet comprising the control device for a temperature control cabinet according to claim 9.
CN202110815374.9A 2021-07-19 2021-07-19 Control method and device for temperature control box and temperature control box Pending CN115542980A (en)

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Application Number Priority Date Filing Date Title
CN202110815374.9A CN115542980A (en) 2021-07-19 2021-07-19 Control method and device for temperature control box and temperature control box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110815374.9A CN115542980A (en) 2021-07-19 2021-07-19 Control method and device for temperature control box and temperature control box

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CN115542980A true CN115542980A (en) 2022-12-30

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