High and low temperature rapid linear temperature change control method and refrigeration equipment

Abstract

The invention relates to the technical field of temperature control, and discloses a high and low temperature rapid linear temperature change control method and refrigeration equipment, the temperature change quantity of a temperature change test box in unit time is obtained, and if the temperature change quantity does not meet the requirement of a temperature change preset value, a temperature change abnormal signal is obtained; according to the temperature change abnormal signal, the temperature change speed difference of the temperature change test box in the time subunit is obtained, the temperature change speed difference of the temperature change test box in the time subunit is compared with the preset temperature change speed difference range of the temperature change test box in the time subunit, and the operation state of the time subunit is recognized; the temperature standard subunit and the temperature different subunit are analyzed and processed to obtain behavior data of the temperature change test box, a temperature change reverse value of the temperature change test box in unit time is obtained based on the behavior data of the temperature change test box, and temperature adjustment state recognition of the temperature change test box is completed according to the temperature change reverse value of the temperature change test box. And the visual management of the temperature change test box in the temperature control process is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and in particular to a high-low temperature rapid linear temperature change control method and a refrigeration device. Background Art

[0002] For refrigeration and heating equipment with a wide temperature range, meeting the requirements of fast linear temperature control has always been a major difficulty that has plagued the industry. First of all, in order to meet the faster heating and cooling rates, the equipment must have sufficiently large cooling and heating capabilities. This requires considering the use of high-power compressor units and heating components when designing and selecting. Even if the equipment produced in this way can meet the functional requirements, it still has problems of high energy consumption and large size.

[0003] Secondly, for linear temperature control, the cooling capacity or heating capacity at each point within the temperature control range is the same, and the cooling capacity of the compressor unit gradually decays as the evaporation temperature decreases. If the cooling capacity at the lowest evaporation temperature is met, it will inevitably cause a serious excess of cooling capacity at high evaporation temperatures. Measures must be taken to control this part of the cooling capacity. The traditional approach is to directly use electric heating for heat resistance, so the heating power needs to be very large. Today, when energy conservation and environmental protection are advocated, this approach is no longer applicable.

[0004] For example, patent publication number CN116164435A discloses a closed liquid heat conduction circulation system with rapid temperature change in a wide temperature range. The control system is used to quickly adjust the temperature within a set temperature range. However, during the adjustment process, there is a lack of monitoring of the operating status of the temperature control equipment, and the problem of inaccurate temperature adjustment of the temperature control equipment cannot be fundamentally solved.

[0005] Based on this, the present invention proposes a high and low temperature rapid linear temperature change control method and a refrigeration device. Summary of the invention

[0006] The purpose of the present invention is to provide a high and low temperature rapid linear temperature change control method. Based on the temperature adjustment operating state of the temperature change test chamber, the state of the components that need to be controlled during the temperature control adjustment process of the temperature change test chamber is identified, that is, by monitoring the real-time operating data of each monitoring item of the controlled components, the risk items of the controlled components are obtained, and by processing the risk items of the controlled components, the early warning value of each controlled component is obtained. Based on the early warning value of the controlled components, the controlled components are divided into non-core components and approved components, and the approved components are identified, so as to select the verification components that need to be regulated during the operation of the temperature change test chamber with high accuracy.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A high and low temperature rapid linear temperature change control method comprises the following steps:

[0009] Obtain the temperature change of the temperature change test box in unit time. If the temperature change does not meet the preset temperature change value requirement, a temperature change abnormality signal is obtained;

[0010] According to the temperature change abnormal signal, the temperature change speed difference of the temperature change test box in the time subunit is obtained, and the temperature change speed difference of the temperature change test box in the time subunit is compared with the preset temperature change speed difference range of the temperature change test box in the time subunit to complete the identification of the operation state of the time subunit;

[0011] The time subunit operation state includes the temperature-accurate subunit and the temperature-differentiated subunit;

[0012] The temperature standard subunit and the temperature difference subunit are analyzed and processed to obtain the behavior data of the temperature change test chamber, based on which the reverse value of the temperature change of the temperature change test chamber per unit time is obtained, and the temperature adjustment state of the temperature change test chamber is identified according to the reverse value of the temperature change of the temperature change test chamber;

[0013] Based on the temperature adjustment status of the temperature change test chamber, the status of the controlled components in the temperature change test chamber is identified, and the controlled components are recorded as non-core components or approved components, and the non-core components that are only in the temperature difference sub-unit are recorded as validation components;

[0014] The temperature variation speed difference of the temperature variation test box in all temperature variation sub-units and the warning value of the verification components of the corresponding temperature variation sub-units are obtained, and the temperature variation speed difference image and the verification component warning image are established in the plane coordinate system. By associating and identifying the temperature variation speed difference image and the verification component warning image, the marking of the control components to be regulated is completed.

[0015] As a further solution of the present invention: the unit time is divided into a plurality of time sub-units, and the actual temperature change rate of the temperature change test box in each time sub-unit is obtained;

[0016] Obtaining the temperature change rate difference between the actual temperature change rate of the temperature change test box in the time subunit and the preset temperature change rate of the temperature change test box in the time subunit;

[0017] If the temperature change rate difference of the temperature change test box in the time sub-unit is within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as the temperature standard sub-unit;

[0018] If the temperature change rate difference of the temperature change test box in the time sub-unit is not within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as a temperature difference sub-unit.

[0019] As a further solution of the present invention: the behavior data of the temperature change test chamber includes the temperature difference temperature standard ratio, the temperature change temperature limit ratio and the temperature change finite difference;

[0020] Denote the temperature difference and temperature standard number ratio as Ws;

[0021] Denote the temperature change amplitude limit ratio as Wf;

[0022] Denote the finite difference of temperature change as Wc:

[0023] That is, the temperature change reverse value Wi of the temperature change test chamber is calculated by the formula Wi = Wc × (Ws + Wf).

[0024] As a further solution of the present invention: the temperature difference and temperature standard number ratio is the ratio of the number of temperature difference sub-units to the number of temperature standard sub-units;

[0025] The temperature change amplitude limit ratio is the ratio of the temperature change deviation of the temperature change test chamber within the time sub-unit to the preset temperature change rate of the temperature change test chamber;

[0026] The temperature change deviation of the temperature change test chamber within the time sub-unit is the difference between the maximum temperature change rate difference and the minimum temperature change rate difference of the temperature change test chamber within the time sub-unit;

[0027] The finite difference of temperature change is the minimum difference between the temperature change amount of the temperature change test chamber per unit time and the requirement of the preset temperature change value.

[0028] As a further solution of the present invention: the first limit value of the preset temperature change reverse value threshold of the temperature change test chamber is Wi1, and the second limit value is Wi2, where Wi1 < Wi2;

[0029] Among them, the first limit value Wi1 and the second limit value Wi2 of the temperature change reverse value threshold of the temperature change test chamber are empirical values, obtained according to experience:

[0030] When Wi < Wi1, it indicates that the overall temperature adjustment state of the temperature change test chamber is average, and a temperature control level one prompt signal is obtained;

[0031] When Wi1 ≤ Wi < Wi2, it indicates that the temperature adjustment state of the temperature change test chamber is poor, and a temperature control level two prompt signal is obtained;

[0032] When Wi ≥ Wi2, it indicates that the temperature adjustment state of the temperature change test chamber is very poor, and a temperature control level three prompt signal is obtained.

[0033] As a further solution of the present invention: obtain the real-time monitoring data corresponding to the monitoring items of the control components, and record the monitoring items whose real-time monitoring data do not meet the preset data requirements as risk items;

[0034] Based on the risk items, obtain the total risk value and risk number ratio of the control components;

[0035] Multiply the total risk value by the risk number ratio to obtain the warning value of the control components;

[0036] If the warning value of the controlled component is ≥ the warning threshold of the controlled component, the controlled component is recorded as a non-core component;

[0037] If the warning value of the controlled component is less than the warning threshold of the controlled component, the controlled component is recorded as an approved component;

[0038] The non-core components that are only in the warm-differentiated sub-unit are recorded as verification components.

[0039] As a further solution of the present invention: obtaining the temperature change rate difference of the temperature change test box in all temperature difference sub-units;

[0040] In the plane coordinate system, the temperature change speed difference of the temperature change test box is constructed in advance from large to small, and a temperature change speed difference image that changes linearly and tilts downward is obtained;

[0041] Taking the temperature variation speed difference image as a reference, the warning value of the verification component of the temperature-differentiated subunit corresponding to the temperature variation speed difference image is obtained, and the warning value of the verification component is constructed to obtain the verification component warning image.

[0042] As a further solution of the present invention: the early warning image of the verification component is identified in a plane coordinate system;

[0043] If the warning image of the verification component changes nonlinearly in the plane coordinate system and is in a band, and has no correlation with the change trend of the temperature change speed difference image, then the temperature change speed difference of the temperature change test box in the temperature difference subunit has no obvious correlation with the working state of the verification component, and a temperature change unrelated signal is obtained;

[0044] The verification components corresponding to the temperature change unrelated signals are recorded as non-verification components;

[0045] If the warning image of the verification component changes linearly in the plane coordinate system and is associated with the change trend of the temperature change speed difference image, a temperature change correlation signal is obtained;

[0046] The verification components corresponding to the temperature change related signals are recorded as control components.

[0047] As a further solution of the present invention: if the warning image of the validation component changes linearly in the plane coordinate system and tilts downward, which is consistent with the change trend of the temperature change speed difference image, it means that the greater the warning value of the control component of the control component, the greater the temperature change speed difference of the temperature change test box in the temperature difference sub-unit, that is, the better the working state of the control component, the smaller the temperature change speed difference of the temperature change test box in the temperature difference sub-unit, and the control positive correlation signal is obtained;

[0048] The verification component corresponding to the control positive correlation signal is recorded as the control positive component;

[0049] If the warning image of the verification component changes linearly in the plane coordinate system and tilts upward, which is opposite to the change trend of the temperature change rate difference image, it means that the greater the warning value of the control component of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, that is, the worse the working state of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, and the reverse correlation signal of the control is obtained;

[0050] The verification component corresponding to the control reverse correlation signal is recorded as the control reverse component.

[0051] Beneficial effects of the present invention:

[0052] (1) When the temperature change amount of the temperature change test box is abnormal, the present invention subdivides the temperature change time of the entire temperature change test box, obtains the temperature change speed difference of each time subunit temperature change test box, thereby completing the identification of the state of the time subunit of the temperature change test box, and obtains the behavior data of the temperature change test box according to the state of the time subunit, and obtains the temperature change reverse value of the temperature change test box by processing the temperature difference temperature criterion ratio, the temperature change temperature limit ratio and the temperature change finite difference, and completes the judgment of the temperature adjustment operation state of the temperature change test box based on the temperature change reverse value of the temperature change test box, so as to facilitate the visual management of the temperature change test box by the staff;

[0053] (2) The present invention identifies the status of components that need to be controlled during the temperature control and adjustment process of the temperature change test chamber based on the temperature adjustment operation status of the temperature change test chamber, that is, by monitoring the real-time operation data of each monitoring item of the controlled components, the risk items of the controlled components are obtained, and the early warning value of each controlled component is obtained by processing the risk items of the controlled components. Based on the early warning values ​​of the controlled components, the controlled components are divided into non-core components and approved components, and the approved components are identified, and the validation components that need to be regulated during the operation of the temperature change test chamber are selected, with high accuracy;

[0054] (3) In the process of regulating and controlling the verification components, the present invention obtains the temperature change speed difference of the temperature change test box in all temperature-differentiated sub-units to establish a temperature change speed difference image, and then obtains the warning value of the verification component of the temperature-differentiated sub-unit corresponding to the temperature change speed difference image to establish the verification component warning image, and through the correlation identification between the temperature change speed difference image and the verification component warning image, the connection between the operation state of the verification component and the temperature adjustment of the temperature change test box is established, so that the verification components are regulated to achieve the control of the temperature adjustment of the temperature change test box, and realize the visual management of the temperature change test box during the temperature control process;

[0055] (4) The present invention has a compact and reasonable structure, is easy to operate and use, and can provide fast linear temperature control. The present invention adds an energy regulation function. At high evaporation temperatures, the compressor unit's own energy regulation is used to reduce the output of refrigeration capacity. The self-cascade refrigeration technology is used to obtain a low-temperature environment. An auxiliary refrigeration system is added. Through the supercooling technology of the auxiliary refrigeration system, the refrigeration capacity requirements can be met even at a lower evaporation temperature, and the selected power of the main compressor unit is reduced. The hot air defrosting method is used to achieve uniform defrosting, high efficiency and energy saving. At the same time, multi-point calculation plus model-free self-building tree algorithm is used, which is specifically designed for large lag system temperature control, so that the temperature of the lag target value can be constantly controlled within ±0.5°C without frequent up and down fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The present invention will be further described below in conjunction with the accompanying drawings.

[0057] Figure 1 It is a flow chart of a high and low temperature rapid linear temperature change control method of the present invention;

[0058] Figure 2 It is a flow chart of time subunit identification in a high and low temperature rapid linear temperature change control method of the present invention;

[0059] Figure 3 This is a flow chart for identifying control components in a high and low temperature rapid linear temperature change control method of the present invention;

[0060] Figure 4 This is a flow chart of the identification of control-related signals in a high-low temperature rapid linear temperature change control method of the present invention;

[0061] Figure 5 This is a process flow chart of a high and low temperature rapid linear temperature change control refrigeration equipment of the present invention.

[0062] In the figure: 1. compressor; 2. oil separator; 3. condenser; 4. dry filter; 5. subcooler; 6. intermediate heat exchanger; 7. gas-liquid separator; 8. evaporator; 9. high-temperature liquid injection solenoid valve; 10. buffer tank; 11. unloading valve; 12. auxiliary compressor; 13. liquid storage tank. DETAILED DESCRIPTION

[0063] 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.

[0064] Example 1

[0065] See also Figure 1 As shown, the present invention is a high and low temperature rapid linear temperature change control method, comprising the following steps:

[0066] The temperature change of the temperature change test chamber in unit time is obtained. If the temperature change does not meet the preset temperature change value requirement, a temperature change abnormality signal is obtained, indicating that the temperature adjustment of the temperature change test chamber is abnormal.

[0067] If the temperature change meets the preset temperature change value, a normal temperature change signal is obtained, indicating that the temperature change test chamber is accurately adjusted;

[0068] According to the temperature change abnormal signal, the temperature change speed difference of the temperature change test box in the time subunit is obtained, and the temperature change speed difference of the temperature change test box in the time subunit is compared with the preset temperature change speed difference range of the temperature change test box in the time subunit to complete the identification of the operation state of the time subunit;

[0069] The time subunit operation state includes the temperature-accurate subunit and the temperature-differentiated subunit;

[0070] The temperature standard subunit and the temperature difference subunit are analyzed and processed to obtain the behavior data of the temperature change test chamber, based on which the reverse value of the temperature change of the temperature change test chamber per unit time is obtained, and the temperature adjustment state of the temperature change test chamber is identified according to the reverse value of the temperature change of the temperature change test chamber;

[0071] Based on the temperature adjustment status of the temperature change test chamber, the status of the controlled components in the temperature change test chamber is identified, and the controlled components are recorded as non-core components or approved components, and the non-core components that are only in the temperature difference sub-unit are recorded as validation components;

[0072] The temperature variation speed difference of the temperature variation test box in all temperature variation sub-units and the warning value of the verification components of the corresponding temperature variation sub-units are obtained, and the temperature variation speed difference image and the verification component warning image are established in the plane coordinate system. By associating and identifying the temperature variation speed difference image and the verification component warning image, the marking of the control components to be regulated is completed.

[0073] Example 2

[0074] Based on Example 1, this embodiment subdivides the entire temperature change time based on the temperature change abnormal signal to complete the identification of the overall state during the temperature change process. The specific process is as follows:

[0075] Divide the unit time into a number of time sub-units, and obtain the actual temperature change rate of the temperature change test chamber in each time sub-unit;

[0076] The actual temperature change rate of the temperature change test box in the time subunit is calculated by difference with the preset temperature change rate of the temperature change test box to obtain the temperature change rate difference of the temperature change test box in the time subunit;

[0077] Among them, the preset temperature change rate of the temperature change test chamber is an empirical value, which is pre-set by the staff according to the performance of the temperature change test chamber;

[0078] See also Figure 2 , comparing the temperature change rate difference of the temperature change test box in the time subunit with the preset temperature change rate difference range of the temperature change test box in the time subunit;

[0079] If the temperature change rate difference of the temperature change test box in the time sub-unit is within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as the temperature standard sub-unit;

[0080] If the temperature change rate difference of the temperature change test box in the time sub-unit is not within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as a temperature difference sub-unit.

[0081] The behavior data of the temperature change test chamber include the temperature difference temperature standard ratio, temperature change temperature limit ratio and temperature change finite difference. The specific acquisition process is as follows:

[0082] Obtain the number of temperature-accurate subunits and the number of temperature-differential subunits in the time subunit, calculate the ratio of the number of temperature-differential subunits to the number of temperature-accurate subunits, and obtain the temperature-differential temperature-accurate ratio;

[0083] Obtain the time subunit corresponding to the maximum and minimum values ​​of the temperature change speed difference of the temperature change test box within the time subunit;

[0084] The maximum value of the temperature change speed difference of the temperature change test box in the time subunit is calculated by difference with the minimum value of the temperature change speed difference of the temperature change test box in the time subunit, so as to obtain the temperature change deviation of the temperature change test box in the time subunit;

[0085] The temperature change deviation of the temperature change test box in the time subunit is calculated by ratio with the preset temperature change rate of the temperature change test box to obtain the temperature change amplitude limit ratio;

[0086] Then obtain the minimum difference between the temperature change measurement of the temperature change test box in unit time and the preset temperature change value, which is recorded as the temperature change finite difference;

[0087] The temperature difference standard ratio is recorded as Ws;

[0088] The temperature change limit ratio is recorded as Wf;

[0089] The finite difference of temperature change is recorded as Wc:

[0090] That is, the temperature change reverse value Wi of the temperature change test box is calculated by the formula Wi=Wc×(Ws+Wf), and the first limit value of the temperature change reverse value threshold of the temperature change test box is preset to Wi1, and the second limit value is Wi2, wherein Wi1<Wi2;

[0091] Among them, the first limit value Wi 1 and the second limit value Wi 2 of the temperature change reverse value threshold of the temperature change test chamber are empirical values obtained based on experience:

[0092] When Wi < Wi 1, it indicates that the overall temperature adjustment state of the temperature change test chamber is average, and a first-level prompt signal for the temperature control level is obtained;

[0093] When Wi 1 ≤ Wi < Wi 2, it indicates that the temperature adjustment state of the temperature change test chamber is poor, and a second-level prompt signal for the temperature control level is obtained;

[0094] When Wi ≥ Wi 2, it indicates that the temperature adjustment state of the temperature change test chamber is very poor, and a third-level prompt signal for the temperature control level is obtained;

[0095] Among them, the warning level of the third-level prompt signal for the temperature control level is higher than that of the second-level prompt signal for the temperature control level, and the warning level of the second-level prompt signal for the temperature control level is higher than that of the first-level prompt signal for the temperature control level;

[0096] The higher the warning level, the worse the operating state of the temperature change test chamber within the current time, which is convenient for the staff to visually manage the temperature change test chamber.

[0097] Embodiment 3

[0098] Based on this embodiment on the basis of Embodiment 2, based on the prompt signal, the state of the components that need to be controlled during the temperature control adjustment process of the temperature change test chamber is identified. The specific process is as follows:

[0099] Within each time sub-unit, obtain the components that need to be controlled during the temperature control adjustment process of the temperature change test chamber, and record the components that need to be controlled within the temperature change test chamber as controlled components;

[0100] Among them, the controlled components include but are not limited to compressors, drying filters, intermediate heat exchangers, and evaporators;

[0101] Obtain the items that need to be monitored during the temperature control adjustment process of the controlled components, and record the corresponding items that need to be monitored as monitoring items;

[0102] Among them, the monitoring items include but are not limited to temperature values, current values, voltage values, humidity values, vibration frequencies, etc. The monitoring content of the monitoring items is determined according to the corresponding usage scenarios of the controlled components, and the content of the monitoring items is all generated by the controlled components themselves during operation. For example, the temperature values and voltage values included in the monitoring items are the actual temperature values and voltage values of the controlled components during operation;

[0103] Retrieve the preset numerical requirements for the corresponding monitoring items, obtain the real-time monitoring data corresponding to each monitoring item, and record the monitoring items whose real-time monitoring data does not meet the preset data requirements as risk items;

[0104] The ratio of the number of risk items to the number of monitoring items is calculated to obtain the risk number ratio;

[0105] The deviation value of the real-time monitoring data of the risk item compared with the corresponding preset numerical value requirement is recorded as the risk difference value of the corresponding risk item;

[0106] Obtain the preset risk coefficient corresponding to the preset risk item. The larger the value of the preset risk coefficient is, the greater the adverse impact of the deviation of the corresponding risk item on the operating accuracy of the control component is;

[0107] The risk difference of the risk item is multiplied by the preset risk coefficient to obtain the risk base, and the risk bases of all risk items are summed up to obtain the total risk value;

[0108] The total risk value is multiplied by the risk number ratio to obtain the early warning value of the controlled components;

[0109] See also Figure 3 , comparing the warning value of the control component with the warning threshold of the control component;

[0110] If the warning value of the controlled component is ≥ the warning threshold of the controlled component, the controlled component is recorded as a non-core component;

[0111] If the warning value of the controlled component is less than the warning threshold of the controlled component, the controlled component is recorded as an approved component;

[0112] Obtain all non-core components, and record the non-core components that are in both the temperature-standard subunit and the temperature-differentiated subunit as non-verification components;

[0113] The non-core components that are only in the warm-differentiated sub-unit are recorded as verification components.

[0114] Example 4

[0115] Based on the third embodiment, the present embodiment identifies the correlation of the verification components in the temperature-differentiated sub-unit to adjust the correlation of the verification components. The specific process is as follows:

[0116] Obtain the temperature change rate difference of the temperature change test box in all temperature-differentiated sub-units, and establish a plane coordinate system with the temperature-differentiated sub-unit as the abscissa and the temperature change rate difference of the temperature change test box as the ordinate;

[0117] In the plane coordinate system, points are drawn in advance in the order of the temperature change speed difference of the temperature change test box from large to small, and all points are connected by a smooth curve from left to right, and a temperature change speed difference image that changes linearly and tilts downward is obtained in the plane coordinate system;

[0118] Then, in the plane coordinate system, taking the temperature variation speed difference image as a reference, the warning value of the verification component of the temperature-differentiated subunit corresponding to the temperature variation speed difference image is obtained, the warning value of the verification component is plotted, and all the points are connected from left to right by a smooth curve, and the warning image of the verification component is obtained in the plane coordinate system;

[0119] Identify the warning image of the verification component in the plane coordinate system;

[0120] If the warning image of the verification component changes nonlinearly in the plane coordinate system and is in a band, and has no correlation with the change trend of the temperature change speed difference image, then the temperature change speed difference of the temperature change test box in the temperature difference subunit has no obvious correlation with the working state of the verification component, and a temperature change unrelated signal is obtained;

[0121] The verification components corresponding to the temperature change unrelated signals are recorded as non-verification components;

[0122] If the warning image of the verification component changes linearly in the plane coordinate system and is associated with the change trend of the temperature change speed difference image, a temperature change correlation signal is obtained;

[0123] The verification components corresponding to the temperature variation related signals are recorded as control components;

[0124] See also Figure 4 , specifically:

[0125] If the warning image of the verification component changes linearly in the plane coordinate system and tilts downward, which is consistent with the change trend of the temperature change rate difference image, it means that the greater the warning value of the control component of the control component, the greater the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, that is, the better the working state of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, and the control positive correlation signal is obtained;

[0126] The verification component corresponding to the control positive correlation signal is recorded as the control positive component;

[0127] If the warning image of the verification component changes linearly in the plane coordinate system and tilts upward, which is opposite to the change trend of the temperature change rate difference image, it means that the greater the warning value of the control component of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, that is, the worse the working state of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, and the reverse correlation signal of the control is obtained;

[0128] The verification component corresponding to the control reverse correlation signal is recorded as the control reverse component.

[0129] The forward control components and the reverse control components are marked, and the working states of the marked forward control components and the reverse control components are regulated.

[0130] In a specific embodiment, the regulation of the forward components includes but is not limited to reducing the deviation of the risk item from the preset value requirement;

[0131] In a specific embodiment, the regulation of the reverse control components includes but is not limited to replacing the control components with a greater risk bearing capacity.

[0132] This makes it easier for staff to adjust and identify control components when the temperature control of the temperature change test chamber is abnormal, and realizes visual management of the temperature change test chamber during the temperature control process.

[0133] Example 5

[0134] See also Figure 5 As shown, the present invention is a high and low temperature rapid linear temperature change control refrigeration equipment, the working mode of the refrigeration equipment includes:

[0135] Cooling mode

[0136] Due to the need to achieve a lower evaporation temperature, the refrigeration system adopts a self-cascade form, and two or more refrigerants with different boiling points are charged into the system. The compressor 1 runs to compress the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The refrigeration oil carried in the refrigerant vapor is separated by the oil separator 2 and returned to the compressor 1 through the oil return pipe. After passing through the condenser 3, the high-boiling-point refrigerant is condensed into a high-pressure liquid refrigerant, and the low-boiling-point refrigerant still exists in the gaseous form. The gas-liquid two-phase mixed refrigerant passes through the drying filter 4 to filter out impurities and moisture, and then enters the subcooler 5. The subcooler 5 The function is to increase the return air temperature and at the same time make the high-boiling point liquid refrigerant that is about to enter the intermediate heat exchanger 6 have a certain degree of supercooling, so as to obtain a lower evaporation temperature. The supercooled mixed gas-liquid two-phase refrigerant is separated by the gas-liquid separator 7 on the refrigeration system. The gaseous refrigerant comes out from the top and enters the intermediate heat exchanger 6. The liquid refrigerant is separated from the bottom due to gravity. After throttling by the first expansion valve, it enters the intermediate heat exchanger 6 to evaporate and absorb heat, and the low-boiling point gaseous low-temperature grade refrigerant is condensed into liquid. The low-temperature liquid refrigerant is throttled and depressurized by the second expansion valve, and finally enters the evaporator 8 to complete the low-temperature refrigeration.

[0137] When cooling directly from high temperature, the superheated refrigerant vapor coming out of the evaporator 8 will cause the exhaust temperature of the compressor 1 to continue to rise. In order to solve this problem, the system adds a high-temperature liquid injection solenoid valve 9. When cooling directly from high temperature, the high-temperature liquid injection solenoid valve 9 is opened, and after throttling by the copper ball valve behind the high-temperature liquid injection solenoid valve 9, it becomes a low-temperature and low-pressure liquid refrigerant, and mixes with the superheated steam coming out of the evaporator 8. When the temperature in the temperature change test box reaches the set value, the high-temperature liquid injection solenoid valve 9 is closed;

[0138] Since the pressure of the low-temperature refrigerant is relatively high, the refrigeration system is equipped with a buffer tank 10 and a unloading valve 11. When the pressure exceeds the opening pressure of the unloading valve 11, the refrigeration system releases the high-pressure gaseous low-temperature refrigerant from before the subcooler 5 into the buffer tank 10 to ensure the safety of the system. The high-pressure gas entering the buffer tank 10 is decompressed by the throttling capillary and then connected to the return air pipe of the compressor 1 to supplement the suction volume of the compressor and improve the refrigeration capacity of the equipment.

[0139] The auxiliary refrigeration system is composed of a compressor unit with lower power. Its purpose is to meet the demand for refrigeration capacity within a lower temperature range. The medium and high temperature sections do not participate in the work, and the low temperature section participates in the operation according to the set temperature. A single refrigerant is used, and the auxiliary compressor 12 operates to compress the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The refrigeration oil carried in the refrigerant vapor is separated through the oil separator 2, and returned to the compressor 1 through the return oil pipe. After passing through the condenser 3, it is condensed into a liquid refrigerant at room temperature. In order to ensure that the condenser 3 can continue to work efficiently, a liquid reservoir 13 is installed at the outlet of the condenser 3. The condensed liquid refrigerant enters the liquid reservoir 13 to avoid excessive occupation of the volume of the condenser 3. The impurities and moisture are filtered out through the drying filter 4. After throttling by the expansion valve, it enters the evaporative subcooler 5 to evaporate and absorb heat, providing a certain degree of subcooling for the main refrigeration system.

[0140] Heating mode

[0141] The heating tube adopts U-shaped fin tube and is placed above the evaporator 8. According to the set temperature value, the output ratio of the heating power is adjusted through the three-phase voltage regulator. It is equipped with a mechanical temperature protection switch to effectively prevent the heating tube from dry burning.

[0142] Defrost mode

[0143] When it is detected that the defrost mode needs to be entered, the circulation fan is turned off, and then the defrost solenoid valve is opened, and the evaporator 8 starts to defrost. After the defrost is completed, the defrost solenoid valve is closed and the circulation fan is turned on.

[0144] Linear temperature control mode

[0145] The program control is performed according to the set temperature range, taking the temperature range of -60℃~150℃ as an example. Cooling mode, from 150℃ to -60℃, the linear cooling rate is 14℃ / min, and the time is 15 minutes. Heating mode, from -60℃ to 150℃, the linear heating rate is 14℃ / min, and the time is 15 minutes. According to the edited program, the equipment enters the automatic operation state, the box is first heated to 150℃ and then starts to cool down, compressor 1 is running, due to the excessive cooling capacity of the high temperature section, the hot gas bypass solenoid valve is opened, and energy regulation is performed. At the same time, the three openings of the expansion valve are automatically adjusted according to the cooling rate through the PID parameters, and the temperature is reduced to the low temperature section, and the auxiliary compressor 12 is turned on to ensure that the cooling capacity at the low evaporation temperature meets the requirements. After dropping to -60℃, the three openings of the expansion valve become 0, and the liquid supply to the evaporator 8 is stopped. The compressor 1 still remains in the working state, and the electric heating is automatically adjusted according to the heating rate through the PID parameters.

[0146] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A high and low temperature rapid linear temperature change control method, characterized in that: The following steps are involved: Obtain the temperature change of the temperature change test box in unit time. If the temperature change does not meet the preset temperature change value requirement, a temperature change abnormality signal is obtained; According to the temperature change abnormal signal, the temperature change speed difference of the temperature change test box in the time subunit is obtained, and the temperature change speed difference of the temperature change test box in the time subunit is compared with the preset temperature change speed difference range of the temperature change test box in the time subunit to complete the identification of the operation state of the time subunit; The time subunit operation state includes the temperature-accurate subunit and the temperature-differentiated subunit; The temperature standard subunit and the temperature difference subunit are analyzed and processed to obtain the behavior data of the temperature change test chamber, based on which the reverse value of the temperature change of the temperature change test chamber per unit time is obtained, and the temperature adjustment state of the temperature change test chamber is identified according to the reverse value of the temperature change of the temperature change test chamber; Based on the temperature adjustment status of the temperature change test chamber, the status of the controlled components in the temperature change test chamber is identified, and the controlled components are recorded as non-core components or approved components, and the non-core components that are only in the temperature difference sub-unit are recorded as validation components; The temperature variation speed difference of the temperature variation test box in all temperature variation sub-units and the warning value of the verification components of the corresponding temperature variation sub-units are obtained, and the temperature variation speed difference image and the verification component warning image are established in the plane coordinate system. By associating and identifying the temperature variation speed difference image and the verification component warning image, the marking of the control components to be regulated is completed.

2. A high and low temperature rapid linear temperature change control method according to claim 1, characterized in that: Divide the unit time into a number of time sub-units, and obtain the actual temperature change rate of the temperature change test chamber in each time sub-unit; Obtaining the temperature change rate difference between the actual temperature change rate of the temperature change test box in the time subunit and the preset temperature change rate of the temperature change test box in the time subunit; If the temperature change rate difference of the temperature change test box in the time sub-unit is within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as the temperature standard sub-unit; If the temperature change rate difference of the temperature change test box in the time sub-unit is not within the preset temperature change rate difference range of the temperature change test box in the time sub-unit, the time sub-unit is recorded as a temperature difference sub-unit.

3. A high and low temperature rapid linear temperature change control method according to claim 1, characterized in that: The behavior data of the temperature change test chamber include the temperature difference temperature standard ratio, temperature change temperature limit ratio and temperature change finite difference; The temperature difference standard ratio is recorded as Ws; The temperature change amplitude ratio is recorded as Wf; The finite difference of temperature change is recorded as Wc: That is, the temperature change reverse value Wi of the temperature change test chamber is calculated by the formula Wi=Wc×(Ws+Wf).

4. A high and low temperature rapid linear temperature change control method according to claim 3, characterized in that: The temperature-different temperature-quasi ratio is the ratio of the number of temperature-different subunits to the number of temperature-quasi subunits; The temperature change amplitude limit ratio is the ratio of the temperature change deviation of the temperature change test chamber within the time subunit to the preset temperature change rate of the temperature change test chamber; The temperature change deviation of the temperature change test box in the time subunit is the difference between the maximum temperature change speed difference of the temperature change test box in the time subunit and the minimum temperature change speed difference of the temperature change test box in the time subunit; The temperature change finite difference is the minimum difference between the temperature change measurement of the temperature change test chamber per unit time and the preset temperature change value.

5. A high and low temperature rapid linear temperature change control method according to claim 3, characterized in that: The first limit value of the temperature change reverse value threshold of the temperature change test box is preset to be Wi 1, and the second limit value is Wi 2, wherein Wi 1<Wi 2; Among them, the first limit value Wi1 and the second limit value Wi2 of the temperature change reverse value threshold of the temperature change test chamber are empirical values obtained based on experience: When Wi < Wi1, it indicates that the overall temperature adjustment state of the temperature change test chamber is average, and a first-level prompt signal for the temperature control level is obtained; When Wi1 ≤ Wi < Wi2, it indicates that the temperature adjustment state of the temperature change test chamber is poor, and a second-level prompt signal for the temperature control level is obtained; When Wi ≥ Wi2, it indicates that the temperature adjustment state of the temperature change test chamber is very poor, and a third-level prompt signal for the temperature control level is obtained.

6. A high and low temperature rapid linear temperature change control method according to claim 1, characterized in that: Obtain the real-time monitoring data corresponding to the monitored items of the controlled components, and record the monitored items whose real-time monitoring data does not meet the preset data requirements as risk items; Based on the risk items, obtain the total risk value and the risk number ratio of the controlled components; Perform a product calculation on the total risk value and the risk number ratio to obtain the warning value of the controlled components; If the warning value of the controlled component ≥ the warning threshold of the controlled component, record the controlled component as a non-nuclear component; If the warning value of the controlled component < the warning threshold of the controlled component, record the controlled component as an approved component; Record the non-nuclear components that are only in the temperature difference sub-unit as verification components.

7. A high and low temperature rapid linear temperature change control method according to claim 6, characterized in that: Obtain the temperature change rate difference of the temperature change test chambers in all temperature difference sub-units; In the plane coordinate system, pre-construct in the order of the temperature change rate difference of the temperature change test chambers from large to small to obtain a temperature change rate difference image that shows a linear change and slopes downward; Based on the temperature change rate difference image, obtain the warning values of the verification components of the temperature difference sub-units corresponding to the temperature change rate difference image, and construct the warning values of the verification components to obtain a verification component warning image.

8. A high and low temperature rapid linear temperature change control method according to claim 7, characterized in that: Identify the verification component warning image in the plane coordinate system; If the verification component warning image shows a non-linear change and is in a band in the plane coordinate system and has no correlation with the change trend of the temperature change rate difference image, then there is no obvious correlation between the temperature change rate difference of the temperature change test chamber in the temperature difference sub-unit and the working state of the verification components, and a temperature change non-correlation signal is obtained; Record the verification components corresponding to the temperature change non-correlation signal as non-verification components; If the verification component warning image shows a linear change and is correlated with the change trend of the temperature change rate difference image in the plane coordinate system, a temperature change correlation signal is obtained; Record the verification components corresponding to the temperature change correlation signal as control components.

9. A high and low temperature rapid linear temperature change control method according to claim 8, characterized in that: If the verification component warning image shows a linear change and slopes downward in the plane coordinate system and is consistent with the change trend of the temperature change rate difference image, it means that the greater the warning value of the control component of the control component, the greater the temperature change rate difference of the temperature change test chamber in the temperature difference sub-unit, that is, the better the working state of the control component, and the smaller the temperature change rate difference of the temperature change test chamber in the temperature difference sub-unit, and a control positive correlation signal is obtained; Record the verification components corresponding to the control positive correlation signal as control positive components; If the warning image of the verification component changes linearly in the plane coordinate system and tilts upward, which is opposite to the change trend of the temperature change rate difference image, it means that the greater the warning value of the control component of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, that is, the worse the working state of the control component, the smaller the temperature change rate difference of the temperature change test box in the temperature difference sub-unit, and the reverse correlation signal of the control is obtained; The verification component corresponding to the control reverse correlation signal is recorded as the control reverse component.

10. A high and low temperature rapid linear temperature change control refrigeration equipment, characterized in that: The high and low temperature rapid linear temperature change control refrigeration equipment is used to execute the method described in any one of claims 1 to 9 above.

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