High-precision laboratory control system and method

Abstract

The invention discloses a high-precision laboratory control system and method, and relates to the technical field of temperature control, and the method comprises the steps: building a high-precision laboratory temperature control layout mode of lower air supply and upper air return, and determining a preliminary temperature adjustment strategy according to a set laboratory temperature control demand temperature and a laboratory temperature; during refrigeration, the first surface cooling section, the second surface cooling section and the proportional-integral regulating valve are combined for refrigeration, and the proportional-integral regulating valve adjusts the opening degree according to the first air outlet difference value and the second air outlet difference value; in the heating process, stepless silicon controlled rectifier electric heating is adopted for primary heating and secondary heating, a first heating difference value and a second heating difference value are calculated, the stepless silicon controlled rectifier electric heating power is adjusted, and a silicon controlled rectifier electric heating is installed on each tail end air supply branch pipe for fine adjustment of the air supply temperature. The temperature control system can quickly respond to temperature change, ensures the accuracy and stability of temperature control, can further reduce energy loss caused by temperature fluctuation, and improves the energy utilization efficiency of the whole system.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and in particular to a high-precision laboratory control system and method. Background Art

[0002] Temperature, as one of the basic parameters in physics, is closely related to people's production and life. Temperature control occupies an extremely important position in many fields such as scientific research, industrial manufacturing, agricultural cultivation and health care. As an important place for scientific research and technological development, laboratories have particularly strict requirements for temperature control. Traditional temperature control systems, such as relay-based controllers, have problems such as limited service life, high failure rate, and poor stability, and can no longer meet the needs of modern scientific research and industrial production. The rise of embedded microcomputer technology and its widespread application in industry have made it possible for temperature control systems to be miniaturized and intelligent.

[0003] In the Chinese invention application with application publication number CN118466613A, a cabin temperature control system and method are disclosed, including an input end, a control module, a temperature control module, a computing unit and an output end; the input end establishes a data connection with the control module, the control module establishes a data connection with the temperature control module, the temperature control module establishes a data connection with the output end, the temperature control module establishes a data connection with the computing unit, and the computing unit establishes a data connection with the input end.

[0004] In the above invention application, a control module is added to control the temperature of the nursing cabin more accurately, wherein the reasonable control of temperature change is achieved through the combined action of the fuzzy control module, the proportional-integral-differential control module and the priority adjustment module. However, the temperature control method is too complicated, resulting in a huge amount of calculation, which requires a large amount of computing resources to support, including high-performance processors, large-capacity storage devices and high-speed data transmission interfaces. This not only increases the hardware cost of the system, but may also cause delays or slow responses in the system due to insufficient computing resources during real-time temperature control.

[0005] To this end, the present invention provides a high-precision laboratory control system and method. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides a high-precision laboratory control system and method. The present invention uses a first and second level surface cooling section in combination with a proportional-integral control valve for refrigeration and uses a stepless thyristor electric heating for first and second level heating. It can quickly respond to temperature changes to restore temperature stability and ensure the accuracy and stability of temperature control. It can further reduce energy losses caused by temperature fluctuations and improve the energy utilization efficiency of the entire system, thereby solving the technical problems recorded in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A high-precision laboratory control method, comprising the following steps:

[0010] Build a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determine the initial temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature;

[0011] During refrigeration, a first- and second-stage cooling section combined with a proportional integral regulating valve is used for refrigeration. Temperature sensors are installed at the air outlets of the first-stage cooling section and the second-stage cooling section respectively to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference Cy is calculated based on the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined based on the temperature adjustment difference Cy. The proportional integral regulating valve adjusts the opening according to the first outlet difference Dzi and the second outlet difference Ezi.

[0012] During heating, stepless thyristor electric heating is used for primary and secondary heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature.

[0013] Furthermore, the upper diffuser is installed above the laboratory ceiling, and the filtered, temperature-controlled and humidity-controlled air is delivered into the laboratory in a soft and uniform manner through the air flow diffusion device. Dense microporous plates are arranged below the diffuser to further refine the delivered airflow and form a delicate air flow field.

[0014] Furthermore, an elevated floor system is installed at the bottom of the room to form a space of a certain height between the floor and the ground, which serves as a return air duct, forming a layout pattern of downward air supply and upward air return. High-performance insulation materials are used in key parts such as walls, roofs and floors to maintain the temperature stability in the laboratory.

[0015] Furthermore, a temperature sensor is installed in the laboratory to detect the laboratory temperature Sw, and the preliminary temperature adjustment strategy is determined according to the set laboratory temperature control demand temperature Kx, which is specifically:

[0016] If the laboratory temperature Sw is greater than the laboratory temperature control required temperature Kx, then the temperature is lowered and regulated; if the laboratory temperature Sw is not greater than the laboratory temperature control required temperature Kx, then the temperature is raised and regulated.

[0017] Furthermore, the refrigeration part adopts one and two level surface cooling sections, both of which use 2 / 7℃ ethylene glycol aqueous solution, and are equipped with proportional integral regulating valves on the return pipe. Temperature sensors are installed at the air outlets of the first level surface cooling section and the second level surface cooling section respectively, and periodic detection is performed to obtain the first cooling outlet temperature Dci and the second cooling outlet temperature Eci.

[0018] The proportional-integral control valve, also known as the electric proportional-integral control valve, is a control valve that uses electrical signals to control flow. It has fast response speed and accurate control characteristics, and can meet the high-precision requirements for fluid medium flow and pressure in complex process flows.

[0019] Furthermore, the laboratory temperature Sw and the laboratory temperature control required temperature Kx are obtained, and the temperature adjustment difference value Cy is calculated:

[0020] Cy=|Kx-Sw|

[0021] The calculation formula of the corresponding temperature adjustment difference value Cy is as above.

[0022] Furthermore, the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined according to the temperature adjustment difference value Cy:

[0023]

[0024] The corresponding calculation formulas for the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are as above.

[0025] Furthermore, the first cooling outlet air temperature Dci and the ideal first cooling outlet air temperature Dca are obtained, and the first outlet air difference Dzi is calculated:

[0026] Dzi=Dci-Dca

[0027] If the first outlet air difference Dzi is greater than 0, the proportional-integral regulating valve opening is adjusted successively until the first cooling outlet air temperature Dci is consistent with the ideal first cooling outlet air temperature Dca;

[0028] If the first outlet gas difference Dzi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the first cooling outlet gas temperature Dci is consistent with the ideal first cooling outlet gas temperature Dca.

[0029] Furthermore, the second cooling outlet temperature Eci and the ideal second cooling outlet temperature Eca are obtained, and the second outlet difference Ezi is calculated:

[0030] Ezi=Eci-Eca

[0031] If the second outlet air difference Ezi is greater than 0, the proportional-integral control valve opening is adjusted successively until the second cooling outlet air temperature Eci is consistent with the ideal second cooling outlet air temperature Eca;

[0032] If the second outlet gas difference Ezi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the second cooling outlet gas temperature Eci is consistent with the ideal second cooling outlet gas temperature Eca.

[0033] Furthermore, the heating part adopts 20KW stepless thyristor electric heating for primary and secondary heating. Temperature sensors are installed at the outlets of the primary heating section and the secondary heating section respectively, and periodic detection is performed to obtain the first heating outlet temperature Rdi and the second heating outlet temperature Rei.

[0034] Stepless thyristor electric heating mainly refers to the use of thyristors (also known as thyristors) as control elements to accurately control the temperature of electric heating equipment through stepless regulation. Stepless regulation is a continuous stepless regulation technology that can achieve smooth regulation of the output power of electrical equipment. In thyristor electric heating, this principle is achieved by controlling the conduction angle of the thyristor. Specifically, the conduction angle of the thyristor refers to the ratio of the conduction time of the thyristor to the entire cycle time in an alternating current cycle. By adjusting this ratio, the current size and power output through the heating element can be continuously adjusted, thereby achieving the purpose of stepless temperature regulation.

[0035] Furthermore, the temperature adjustment difference value Cy is obtained to determine the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea:

[0036]

[0037] The corresponding calculation formulas for the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are as above.

[0038] Furthermore, the first heating outlet temperature Rdi and the ideal first heating outlet temperature Rda are obtained, and the first heating difference Jdi is calculated:

[0039] Jdi=Rdi-Rda

[0040] If the first heating difference Jdi is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda;

[0041] If the first heating difference Jdi is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda.

[0042] Furthermore, the second heating outlet temperature Rei and the ideal second heating outlet temperature Rea are obtained, and the second heating difference Jei is calculated:

[0043] Jei=Rei-Rea

[0044] If the second heating difference value Jei is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea;

[0045] If the second heating difference Jei is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea.

[0046] Furthermore, a 0.25kw thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature so that the actual heated air outlet temperature is greater than the laboratory temperature control required temperature Kx.

[0047] A high-precision laboratory control system, comprising:

[0048] The preliminary temperature adjustment determination module builds a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determines the preliminary temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature;

[0049] Refrigeration module, when refrigerating, uses the first and second level cooling sections combined with the proportional integral regulating valve for refrigeration, installs temperature sensors at the air outlets of the first level cooling section and the second level cooling section respectively, detects the first cooling outlet temperature Dci and the second cooling outlet temperature Eci, calculates the temperature adjustment difference Cy according to the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and determines the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca according to the temperature adjustment difference Cy, and adjusts the opening of the proportional integral regulating valve according to the first outlet difference Dzi and the second outlet difference Ezi;

[0050] The heating module adopts stepless thyristor electric heating for primary and secondary heating during heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature.

[0051] (III) Beneficial effects

[0052] The present invention provides a high-precision laboratory control system and method, which has the following beneficial effects:

[0053] 1. Build a high-precision laboratory temperature control layout mode with downward air supply and upward return air, and determine the initial temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature. The layout mode of downward air supply and upward return air helps to form a more uniform and stable air flow field and reduce the indoor temperature stratification phenomenon. Combined with precise temperature sensors and intelligent control systems, it can monitor and adjust the air supply temperature and air volume in real time to quickly respond and accurately maintain the set temperature, meet the strict requirements of high-precision experiments for temperature control, and the on-demand adjustment method is more energy-efficient than the constant operation of the air conditioning system, which is in line with the concept of green building and sustainable development.

[0054] 2. During refrigeration, the first and second level cooling sections are combined with the proportional integral control valve for refrigeration. Temperature sensors are installed at the outlets of the first level cooling section and the second level cooling section respectively to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference value Cy is calculated based on the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined based on the temperature adjustment difference value Cy. The proportional integral control valve adjusts the opening according to the first outlet difference value Dzi and the second outlet difference value Ezi. The PID control valve can automatically adjust the valve opening according to the feedback signal of the temperature sensor and the set ideal temperature value. Through the combined control of the three parameters of proportion (P), integration (I) and differential (D), the PID control valve can achieve precise regulation of the fluid flow, thereby ensuring that the cooling outlet temperature is stable within the ideal range. In addition, the PID control valve has a fast response speed and can quickly respond to temperature changes. When it is detected that the actual temperature deviates from the ideal temperature, the PID control valve can quickly adjust the valve opening to restore the temperature stability.

[0055] 3. When heating, use stepless thyristor electric heating for primary and secondary heating. According to the temperature adjustment difference value Cy, determine the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea, calculate the first heating difference Jdi and the second heating difference Jei, adjust the stepless thyristor electric heating power, and install a 0.25kw thyristor electric heater on each end air supply branch pipe to fine-tune the air supply temperature. This can more finely control the power output of each stage of heating, ensure the accuracy and stability of temperature control, further reduce the energy loss caused by temperature fluctuations, and improve the energy utilization efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of a high-precision laboratory control method of the present invention;

[0057] Figure 2 This is a structural schematic diagram of a high-precision laboratory control system of the present invention. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] See also Figure 1 The present invention provides a high-precision laboratory control method, comprising the following steps:

[0060] Step 1: Build a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determine the preliminary temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature.

[0061] The step 1 includes the following contents:

[0062] Step 101, install the upper diffuser above the laboratory ceiling, and send the filtered, temperature-controlled and humidity-controlled air into the laboratory in a soft and uniform manner through the air flow diffusion device, and arrange dense microporous plates under the diffuser to further refine the sent air flow and form a delicate air flow field.

[0063] Step 102: Install an elevated floor system at the bottom of the room to form a space of a certain height between the floor and the ground as a return air duct, forming a layout pattern of downward air supply and upward air return. Use high-performance insulation materials in key locations such as walls, roofs, and floors to maintain temperature stability in the laboratory.

[0064] Step 103: Install a temperature sensor in the laboratory to detect the laboratory temperature Sw, and determine the preliminary temperature adjustment strategy based on the set laboratory temperature control demand temperature Kx, specifically:

[0065] If the laboratory temperature Sw is greater than the laboratory temperature control required temperature Kx, then the temperature is lowered and regulated; if the laboratory temperature Sw is not greater than the laboratory temperature control required temperature Kx, then the temperature is raised and regulated.

[0066] When using, combine the contents in steps 101 to 103:

[0067] A high-precision laboratory temperature control layout mode with downward air supply and upward return air is established. The preliminary temperature adjustment strategy is determined based on the set laboratory temperature control demand temperature and laboratory temperature. The downward air supply and upward return air layout mode helps to form a more uniform and stable airflow field and reduce the indoor temperature stratification phenomenon. Combined with precise temperature sensors and intelligent control systems, it can monitor and adjust the air supply temperature and air volume in real time to quickly respond and accurately maintain the set temperature, meeting the strict requirements of high-precision experiments for temperature control. The on-demand adjustment method is more energy-efficient than the constant operation air conditioning system, which is in line with the concept of green building and sustainable development.

[0068] Step 2: During refrigeration, a first- and second-stage surface cooling section combined with a proportional-integral regulating valve is used for refrigeration. Temperature sensors are installed at the air outlets of the first-stage surface cooling section and the second-stage surface cooling section respectively to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference Cy is calculated based on the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined based on the temperature adjustment difference Cy. The proportional-integral regulating valve adjusts the opening according to the first outlet difference Dzi and the second outlet difference Ezi.

[0069] The step 2 includes the following contents:

[0070] Step 201, the refrigeration part adopts one-level and two-level surface cooling sections, both of which adopt 2 / 7℃ ethylene glycol aqueous solution, and a proportional integral regulating valve is installed on the return pipe, and temperature sensors are installed at the air outlets of the first-level surface cooling section and the second-level surface cooling section respectively, and periodic detection is performed to obtain the first cooling outlet temperature Dci and the second cooling outlet temperature Eci.

[0071] The proportional-integral control valve, also known as the electric proportional-integral control valve, is a control valve that uses electrical signals to control flow. It has fast response speed and accurate control characteristics, and can meet the high-precision requirements for fluid medium flow and pressure in complex process flows.

[0072] Step 202: Obtain the laboratory temperature Sw and the laboratory temperature control required temperature Kx, and calculate the temperature adjustment difference value Cy:

[0073] Cy=|Kx-Sw|

[0074] The calculation formula of the corresponding temperature adjustment difference value Cy is as above.

[0075] Step 203: Determine the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca according to the temperature adjustment difference value Cy:

[0076]

[0077] The corresponding calculation formulas for the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are as above.

[0078] Step 204: Obtain the first cooling outlet air temperature Dci and the ideal first cooling outlet air temperature Dca, and calculate the first outlet air difference Dzi:

[0079] Dzi=Dci-Dca

[0080] If the first outlet air difference Dzi is greater than 0, the proportional-integral control valve opening is adjusted successively until the first cooling outlet air temperature Dci is consistent with the ideal first cooling outlet air temperature Dca.

[0081] If the first outlet gas difference Dzi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the first cooling outlet gas temperature Dci is consistent with the ideal first cooling outlet gas temperature Dca.

[0082] Step 205: Obtain the second cooling outlet air temperature Eci and the ideal second cooling outlet air temperature Eca, and calculate the second outlet air difference Ezi:

[0083] Ezi=Eci-Eca

[0084] If the second outlet gas difference Ezi is greater than 0, the proportional-integral control valve opening is adjusted successively until the second cooling outlet gas temperature Eci is consistent with the ideal second cooling outlet gas temperature Eca.

[0085] If the second outlet gas difference Ezi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the second cooling outlet gas temperature Eci is consistent with the ideal second cooling outlet gas temperature Eca.

[0086] When using, combine the contents in steps 201 to 205:

[0087] During refrigeration, a first- and second-stage cooling section combined with a proportional integral control valve is used for refrigeration. Temperature sensors are installed at the outlets of the first-stage cooling section and the second-stage cooling section to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference value Cy is calculated based on the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined based on the temperature adjustment difference value Cy. The proportional integral control valve adjusts the opening according to the first outlet difference value Dzi and the second outlet difference value Ezi. The PID control valve can automatically adjust the valve opening according to the feedback signal of the temperature sensor and the set ideal temperature value. Through the combined control of the three parameters of proportion (P), integration (I) and differential (D), the PID control valve can achieve precise adjustment of the fluid flow, thereby ensuring that the cooling outlet temperature is stable within the ideal range. In addition, the PID control valve has a fast response speed and can quickly respond to temperature changes. When it is detected that the actual temperature deviates from the ideal temperature, the PID control valve can quickly adjust the valve opening to restore temperature stability.

[0088] Step three, use stepless thyristor electric heating for primary and secondary heating during heating, determine the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea based on the temperature adjustment difference Cy, calculate the first heating difference Jdi and the second heating difference Jei, adjust the stepless thyristor electric heating power, and install a thyristor electric heater on each terminal air supply branch pipe to fine-tune the air supply temperature.

[0089] The step three includes the following contents:

[0090] Step 301, the heating part adopts 20KW stepless thyristor electric heating for primary and secondary heating, and temperature sensors are installed at the outlets of the primary heating section and the secondary heating section respectively, and periodic detection is performed to obtain the first heating outlet temperature Rdi and the second heating outlet temperature Rei.

[0091] Stepless thyristor electric heating mainly refers to the use of thyristors (also known as thyristors) as control elements to accurately control the temperature of electric heating equipment through stepless regulation. Stepless regulation is a continuous stepless regulation technology that can achieve smooth regulation of the output power of electrical equipment. In thyristor electric heating, this principle is achieved by controlling the conduction angle of the thyristor. Specifically, the conduction angle of the thyristor refers to the ratio of the conduction time of the thyristor to the entire cycle time in an alternating current cycle. By adjusting this ratio, the current size and power output through the heating element can be continuously adjusted, thereby achieving the purpose of stepless temperature regulation.

[0092] Step 302: Obtain the temperature adjustment difference value Cy, and determine the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea:

[0093]

[0094] The corresponding calculation formulas for the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are as above.

[0095] Step 303, obtain the first heating outlet temperature Rdi and the ideal first heating outlet temperature Rda, and calculate the first heating difference Jdi:

[0096] Jdi=Rdi-Rda

[0097] If the first heating difference Jdi is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda.

[0098] If the first heating difference Jdi is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda.

[0099] Step 304, obtain the second heating outlet temperature Rei and the ideal second heating outlet temperature Rea, and calculate the second heating difference Jei:

[0100] Jei=Rei-Rea

[0101] If the second heating difference Jei is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea.

[0102] If the second heating difference Jei is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea.

[0103] Step 305: Install a 0.25 kW thyristor electric heater on each of the terminal air supply branches to fine-tune the air supply temperature so that the actual heated air outlet temperature is greater than the laboratory temperature control required temperature Kx.

[0104] When using, combine the contents in steps 301 to 305:

[0105] During heating, stepless thyristor electric heating is used for primary and secondary heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a 0.25kw thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature. This can more finely control the power output of each stage of heating, ensure the accuracy and stability of temperature control, further reduce the energy loss caused by temperature fluctuations, and improve the energy utilization efficiency of the entire system.

[0106] See also Figure 2 The present invention provides a high-precision laboratory control system, comprising:

[0107] The preliminary temperature adjustment determination module builds a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determines the preliminary temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature.

[0108] The refrigeration module adopts the first and second level surface cooling sections combined with the proportional integral control valve for refrigeration. Temperature sensors are installed at the air outlets of the first level surface cooling section and the second level surface cooling section respectively to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference Cy is calculated according to the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined according to the temperature adjustment difference Cy. The proportional integral control valve adjusts the opening according to the first outlet difference Dzi and the second outlet difference Ezi.

[0109] The heating module adopts stepless thyristor electric heating for primary and secondary heating during heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature.

[0110] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0111] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A high-precision laboratory control method, characterized in that: The steps include: Build a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determine the initial temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature; During refrigeration, a first- and second-stage cooling section combined with a proportional integral regulating valve is used for refrigeration. Temperature sensors are installed at the air outlets of the first-stage cooling section and the second-stage cooling section respectively to detect the first cooling outlet temperature Dci and the second cooling outlet temperature Eci. The temperature adjustment difference Cy is calculated based on the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined based on the temperature adjustment difference Cy. The proportional integral regulating valve adjusts the opening according to the first outlet difference Dzi and the second outlet difference Ezi. During heating, stepless thyristor electric heating is used for primary and secondary heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature.

2. A high-precision laboratory control method according to claim 1, characterized in that: Get the laboratory temperature Sw and the laboratory temperature control required temperature Kx, and calculate the temperature adjustment difference Cy: Cy=|Kx-Sw| The calculation formula of the corresponding temperature adjustment difference value Cy is as above.

3. A high-precision laboratory control method according to claim 2, characterized in that: The ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca are determined according to the temperature adjustment difference value Cy: The corresponding calculation formulas for the ideal first cooling outlet air temperature Dca and the ideal second cooling outlet air temperature Eca are as above.

4. A high-precision laboratory control method according to claim 3, characterized in that: Get the first cooling outlet temperature Dci and the ideal first cooling outlet temperature Dca, and calculate the first outlet difference Dzi: Dzi=Dci-Dca If the first outlet air difference Dzi is greater than 0, the proportional-integral regulating valve opening is adjusted successively until the first cooling outlet air temperature Dci is consistent with the ideal first cooling outlet air temperature Dca; If the first outlet gas difference Dzi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the first cooling outlet gas temperature Dci is consistent with the ideal first cooling outlet gas temperature Dca.

5. A high-precision laboratory control method according to claim 4, characterized in that: Get the second cooling outlet temperature Eci and the ideal second cooling outlet temperature Eca, and calculate the second outlet difference Ezi: Ezi=Eci-Eca If the second outlet air difference Ezi is greater than 0, the proportional-integral control valve opening is adjusted successively until the second cooling outlet air temperature Eci is consistent with the ideal second cooling outlet air temperature Eca; If the second outlet gas difference Ezi is not greater than 0, the proportional-integral control valve opening is adjusted down in sequence until the second cooling outlet gas temperature Eci is consistent with the ideal second cooling outlet gas temperature Eca.

6. A high-precision laboratory control method according to claim 5, characterized in that: Obtain the temperature adjustment difference value Cy, and determine the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea: The corresponding calculation formulas for the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are as above.

7. A high-precision laboratory control method according to claim 6, characterized in that: Get the first heating outlet temperature Rdi and the ideal first heating outlet temperature Rda, and calculate the first heating difference Jdi: Jdi=Rdi-Rda If the first heating difference Jdi is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda; If the first heating difference Jdi is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the first heating outlet temperature Rdi is consistent with the ideal first heating outlet temperature Rda.

8. A high-precision laboratory control method according to claim 7, characterized in that: Get the second heating outlet temperature Rei and the ideal second heating outlet temperature Rea, and calculate the second heating difference Jei: Jei=Rei-Rea If the second heating difference value Jei is greater than 0, the stepless thyristor electric heating power is adjusted down in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea; If the second heating difference Jei is not greater than 0, the stepless thyristor electric heating power is adjusted up in sequence until the second heating outlet temperature Rei is consistent with the ideal second heating outlet temperature Rea.

9. A high-precision laboratory control method according to claim 8, characterized in that: A 0.25kw thyristor electric heater is installed on each terminal air supply branch to fine-tune the air supply temperature so that the actual heated air outlet temperature is greater than the laboratory temperature control required temperature Kx.

10. A high-precision laboratory control system, used to implement the method according to any one of claims 1 to 9, characterized in that: include: The preliminary temperature adjustment determination module builds a high-precision laboratory temperature control layout mode with downward air supply and upward air return, and determines the preliminary temperature adjustment strategy based on the set laboratory temperature control demand temperature and laboratory temperature; Refrigeration module, when refrigerating, uses the first and second level cooling sections combined with the proportional integral regulating valve for refrigeration, installs temperature sensors at the air outlets of the first level cooling section and the second level cooling section respectively, detects the first cooling outlet temperature Dci and the second cooling outlet temperature Eci, calculates the temperature adjustment difference Cy according to the laboratory temperature Sw and the laboratory temperature control demand temperature Kx, and determines the ideal first cooling outlet temperature Dca and the ideal second cooling outlet temperature Eca according to the temperature adjustment difference Cy, and adjusts the opening of the proportional integral regulating valve according to the first outlet difference Dzi and the second outlet difference Ezi; The heating module adopts stepless thyristor electric heating for primary and secondary heating during heating. According to the temperature adjustment difference value Cy, the ideal first heating outlet temperature Rda and the ideal second heating outlet temperature Rea are determined, the first heating difference Jdi and the second heating difference Jei are calculated, the stepless thyristor electric heating power is adjusted, and a thyristor electric heater is installed on each terminal air supply branch pipe to fine-tune the air supply temperature.

Images