A temperature energy efficiency testing device and a testing method thereof

Abstract

The present invention discloses a temperature energy efficiency test device, which includes an intracavity data acquisition device, an extracavity data acquisition device, and a data analysis and control device; the intracavity data acquisition device is connected to the data analysis and control device in a wireless manner, and the extracavity data acquisition device is connected to the data analysis and control device and the sterilizer under test respectively through wires. The present invention can ensure real-time transmission of measurement data while ensuring that the sterilizer is completely sealed, and can meet the needs of sterilizer temperature calibration test and energy efficiency test. The present invention also provides an energy efficiency test method and a temperature calibration test method using a high-pressure steam sterilizer temperature energy efficiency test device.

Description

Technical Field

[0001] The invention belongs to the technical field of energy efficiency testing, and relates to a temperature energy efficiency testing device and a testing method thereof. Background Art

[0002] With the outbreak of the epidemic, the sterilization demand of biological laboratories has risen sharply. As a commonly used sterilization method, high-pressure steam sterilization has a wide range of applications. It is often used in biopharmaceuticals, medicine and health, food production and other fields. The principle of high-pressure steam sterilization is that in a highly enclosed device, the steam pressure will increase with the increase of temperature, thereby achieving the effect of sterilization. Therefore, the actual working temperature of the high-pressure steam sterilizer will directly affect the sterilization effect. As a high-risk equipment for clinical applications, it is particularly important to perform regular temperature detection and calibration. Due to the large use of high-pressure steam sterilizers, high operating temperatures, and long working hours, its energy consumption is relatively large, so it is particularly important to perform energy efficiency testing on it. At present, there is a lack of unified high-pressure steam sterilizer energy efficiency testing methods in China, which leads to manufacturers not paying attention to product energy efficiency improvement in order to save costs. The research on the energy efficiency testing method of high-pressure steam sterilizer can force related manufacturers to develop low-energy and high-efficiency high-pressure sterilization products through energy efficiency test results, promote the progress and development of related industries, and promote the development of national energy conservation and emission reduction strategies. Temperature testing is the basis of autoclave energy efficiency testing. Designing an accurate and efficient autoclave temperature testing device is the prerequisite for ensuring the accuracy and reliability of autoclave energy efficiency testing.

[0003] The cavity of the high-pressure steam sterilizer is made of metal and has high sealing requirements. When working, the inside of the cavity is in a high-temperature, high-pressure and high-humidity environment. At present, there are two common temperature testing methods for high-pressure steam sterilizers at home and abroad:

[0004] 1. Test with wireless temperature data collector:

[0005] The wireless temperature data collector records the temperature data collected by the sensor in the collector. Before the test, set the corresponding program and place the collector at the center point of the sterilizer cavity to be tested for calibration. After the test, the recorded data is read through the signal converter and software supporting the computer. The temperature test accuracy of this type of data collector is ±0.1℃, and nearly 20,000 data can be recorded at a time. The working power is the lithium battery in the equipment, and the service life is about 5 years. This calibration method is due to the fact that no external connection wires are introduced, and the sterilizer cavity is well sealed to ensure that the data is true and reliable. However, the initial cost of this set of equipment is close to 500,000 yuan, and its service life is only about five years. It is necessary to read and analyze the collected data through a computer, and it is impossible to obtain real-time temperature data, and it is impossible to obtain accurate temperature deviation data. It cannot meet the needs of obtaining real-time cavity internal temperature for high-pressure steam sterilizer energy consumption testing. Therefore, this type of device has not been widely promoted among grassroots metrology and calibration institutions, sterilizer users and other groups.

[0006] 2. Test with thermocouple and temperature data recorder:

[0007] Thermocouples are common temperature sensors. Place one end of a thinner T-type thermocouple (generally with a wire diameter of no more than 1.0 mm) at the center of the autoclave cavity, cover the autoclave door, and try to seal it. After the autoclave starts working, a small amount of steam overflows through the thermocouple outlet, but the autoclave can continue to work. When the autoclave is in the sterilization state, the temperature data is collected through the data acquisition device. The test process can monitor the temperature data of the box in real time and compare and calibrate it with the temperature data displayed by the sterilizer. This method uses the currently widely used thermocouples to make the calibration of the autoclave convenient and simple, but due to the introduction of thermocouples, there are always leaks in the entire sterilization process, which will affect the test results to a certain extent, and there are certain safety hazards. For energy efficiency testing, the presence of leaks will lead to measurement errors.

[0008] In addition, due to the closed structure of the autoclave, traditional wireless signal transmission methods (such as wifi, Bluetooth, infrared, and 5G signals) cannot pass through the cavity structure of the autoclave. Therefore, the current common wireless temperature data acquisition system cannot read the real-time internal temperature of the autoclave. During the sterilizer energy efficiency test, accurate real-time temperature data needs to be read. In order to reduce test errors, it is also necessary to prevent the formation of additional leaks during the sterilization process. Therefore, the two common autoclave temperature test methods are not applicable. Summary of the invention

[0009] In order to solve the deficiencies in the prior art, the object of the present invention is to provide a temperature energy efficiency testing device and a testing method for a high-pressure steam sterilizer.

[0010] In view of the problems existing in the above-mentioned prior art, the present invention proposes a new type of sterilizer temperature testing device, which ensures the real-time transmission of measurement data while ensuring that the sterilizer is completely sealed, and can meet the needs of sterilizer temperature calibration test and energy efficiency test. At the same time, the sterilizer energy efficiency testing device is further designed and developed to lay the foundation for the application of the sterilizer energy efficiency testing method. The present invention focuses on the test method and calculation formula of the energy efficiency of the sterilizer, and studies and derives its sterilization non-pressure heating energy efficiency, high-pressure heating energy efficiency, constant temperature energy efficiency, and sterilization energy efficiency test method and calculation formula.

[0011] The present invention proposes a temperature energy efficiency test device for a high-pressure steam sterilizer, the test device comprising an in-cavity data acquisition device, an out-cavity data acquisition device, and a data analysis and control device;

[0012] The intracavitary data acquisition device is connected to the data analysis and control device in a wireless manner, and the extracavitary data acquisition device is connected to the data analysis and control device and the sterilizer under test respectively through wires.

[0013] The intracavity data acquisition device is composed of a temperature sensor, a standard sterilization indicator card, a test bracket, a sterilization indicator card image recognizer, a data transmitter, and a power control module;

[0014] The temperature sensor, the sterilization indicator card image recognizer, the data transmitter, and the power control module are connected respectively through wires; and the standard sterilization indicator card is contactlessly connected to the sterilization indicator card image recognizer.

[0015] The temperature sensor includes sensors such as thermocouples and thermal resistors, which collect temperature data in the sterilizer cavity under test and transmit it to the data transmitter; the sterilization indicator card image recognizer recognizes the grayscale of the color block of the standard sterilization indicator card, and if it reaches the standard color, it transmits a signal that the sterilization effect has been achieved to the data transmitter; the data transmitter is responsible for compiling and transmitting the signals transmitted by the temperature sensor and the sterilization indicator card image recognizer; the power control module is used to provide power for the temperature sensor, the sterilization indicator card image recognizer, and the data transmitter.

[0016] The data transmitter is provided with a data transmitting end, which is attached to the inner shell of the cavity of the sterilizer under test, and can generally be arranged at the metal top cover of the sterilizer cavity, compiles the collected data, and transmits it by microwave.

[0017] The test stand consists of legs, pillars, and a test platform; the number of the legs is ≥3, the legs are connected to the pillars by a hinge structure, and are fixed and fastened using fasteners; a ruler is provided on the pillars, and the position of the test platform in the tested sterilizing pot is controlled by adjusting the length of the pillars; the test platform and the pillars are connected and fixed by fasteners.

[0018] The test platform is provided with a temperature sensor connection hole, a sterilization indicator card image recognizer connection hole, and a sterilization indicator card slot; the temperature sensor is installed in the temperature sensor connection hole, the sterilization indicator card image recognizer is installed in the sterilization indicator card image recognizer connection hole, and the standard sterilization indicator card is inserted in the sterilization indicator card slot.

[0019] The extracavity data acquisition device includes an energy consumption test device and an exhaust recording device;

[0020] The exhaust recording device is connected to the data analysis control device and the energy consumption test device through a wire, and the exhaust recording device contains a gas sensor, which is connected to the exhaust port of the sterilizer under test to monitor whether the exhaust port is in an exhaust state;

[0021] The energy consumption test equipment is powered by the mains, and is connected to the power supply terminal of the sterilizer under test through a wire, so as to count the energy consumption of the sterilizer under test during use.

[0022] The data analysis control device includes a data receiver, a data recording and analysis device, and a control module;

[0023] The data receiver, the data recording and analyzing device, and the control module are connected by wires;

[0024] The data receiver is provided with a data receiving end, which is attached to a position close to the outside of the sterilizer cavity under test and the corresponding position of the data sending end inside the cavity, and receives the microwave signal sent by the data transmitter;

[0025] The data recording and analysis device records real-time temperature data and energy consumption data, and obtains the non-pressure heating energy efficiency, high-pressure heating energy efficiency, constant temperature energy efficiency, total sterilization energy efficiency, and temperature calibration data of the high-pressure steam sterilizer through calculation and analysis;

[0026] The control module can be used to control the intracavity data acquisition device and / or the extracavity data acquisition device. When used to simultaneously control the intracavity data acquisition device and the extracavity data acquisition device, the control of the intracavity data acquisition device is performed through microwave signal transmission via a data receiver and a data transmitter. Under normal circumstances, the control module is only used to control the extracavity data acquisition device, and when the data transceiver of the intracavity data acquisition device is pasted on the intracavity outer shell, it will automatically start.

[0027] The present invention also proposes an energy efficiency testing method using the above-mentioned testing device, the method comprising the following steps:

[0028] Step 1: Measure the volume V of the working area of ​​the high-pressure steam sterilizer to be tested, and determine the geometric center position of the cavity; install the intracavity data acquisition device in the high-pressure steam sterilizer to be tested, with the test bracket located at the geometric center position of the cavity, and attach the data transmitter to the inner shell of the high-pressure steam sterilizer cavity;

[0029] Step 2: attach the data receiving end of the data receiver in the data analysis and control device to the position close to the corresponding data sending end outside the cavity of the high-pressure steam sterilizer to be tested and inside the cavity, start the preheating high-pressure steam sterilizer temperature energy efficiency test device, and check the internal temperature of the high-pressure steam sterilizer cavity through the data analysis and control device;

[0030] Step 3: Set the temperature of the high-pressure steam sterilizer to the sterilization temperature consistent with the temperature corresponding to the standard sterilization indicator card, close the manual exhaust port of the high-pressure steam sterilizer, open the automatic exhaust port of the high-pressure steam sterilizer, set the sterilization time to 30 minutes, and add pure water used for sterilization to the rated water level line;

[0031] Step 4: Connect the power supply under no-load condition to start heating up. At the same time, the energy consumption test equipment starts recording energy consumption.

[0032] Step 5. After starting the work, the temperature sensor is used to measure the actual temperature t1 at the center of the high-pressure steam sterilizer cavity. When the exhaust recording device detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the energy consumption test equipment stops recording the energy consumption. The energy consumption recorded at this stage is E1. The temperature sensor is used to measure the actual temperature t2 at the center of the high-pressure steam sterilizer cavity. The above data are used to calculate the non-pressure heating energy efficiency C1.

[0033] The calculation method of the non-pressure heating energy efficiency C1 is as follows:

[0034] C1=E1 / [(t2-t1)·c1·V·ρ1];

[0035] Among them, C1 is the non-pressure heating energy efficiency under the empty furnace heating test, the unit is 1, c1 is the specific heat capacity of air in the initial state, V is the volume of the high-pressure steam sterilizer cavity, ρ1 is the density of air in the initial state;

[0036] When the exhaust recording device detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the automatic exhaust port is closed, and the energy consumption test equipment starts to record the high-pressure heating energy consumption. When the cavity temperature sensor detects that the cavity temperature of the high-pressure steam sterilizer reaches the set temperature ±1°C, the energy consumption test equipment stops recording the high-pressure heating energy consumption. The energy consumption at this stage is E2. The actual temperature t3 at the center of the cavity of the high-pressure steam sterilizer is measured by the temperature sensor. The high-pressure heating energy efficiency C2 is calculated using the above data.

[0037] The calculation method of the high pressure heating energy efficiency C2 is as follows:

[0038] C2=E2 / [(t3-t2)·c2·V·ρ2];

[0039] Among them, C2 is the high-pressure heating energy efficiency under the empty furnace heating test, the unit is 1, c2 is the specific heat capacity of water vapor at the temperature t2, V is the volume of the high-pressure steam sterilizer cavity, and ρ2 is the density of water vapor at the temperature t2.

[0040] Step 6: After the temperature in the cavity reaches the preset sterilization temperature ±1°C, sterilization begins, and the energy consumption test device starts recording in the third stage; during the sterilization process, when the color grayscale of the indication area of ​​the standard sterilization indicator card reaches the preset value, the sterilization indicator card image recognizer sends a sterilization standard-reaching signal, which is sent to the data receiver (12) in the data analysis and control device through the cavity data transmitter, and the energy consumption test device is controlled to stop recording energy consumption. The energy consumption in this stage is E3, and the constant temperature energy efficiency C3 is calculated;

[0041] The calculation method of the constant temperature energy efficiency C3 is as follows:

[0042]

[0043] Among them, C3 is the constant temperature energy efficiency, the unit is joule per cubic meter; E3 is the power consumption of the constant temperature test, the unit is joule; V is the volume of the high-pressure steam sterilizer cavity.

[0044] Step 7: Calculate the total sterilization energy efficiency of the high-pressure steam sterilizer according to the non-pressure heating energy efficiency C1, high-pressure heating energy efficiency C2, constant temperature energy efficiency C3 and the working area volume V of the high-pressure steam sterilizer.

[0045] The calculation method of the total sterilization energy efficiency C is as follows:

[0046] C = (E1 + E2 + E3) / V;

[0047] Where C is the total sterilization energy efficiency, measured in joules per cubic meter; V is the volume of the high-pressure steam sterilizer cavity.

[0048] The present invention also proposes a high-pressure steam sterilizer temperature calibration test method, the method comprising the following steps:

[0049] Step 1: Determine the geometric center position of the autoclave cavity. Install the intracavity data acquisition device in the autoclave to be tested. The test bracket is located at the geometric center position of the cavity. The intracavity data acquisition device starts working. The data transmitter is attached to the inner shell of the autoclave cavity.

[0050] Step 2: attach the data receiving end of the data receiver in the data analysis and control device to the position close to the corresponding data sending end outside the cavity of the tested high-pressure steam sterilizer and inside the cavity, start the preheating high-pressure steam sterilizer temperature energy efficiency test device, and check the internal temperature of the high-pressure steam sterilizer cavity through the data analysis and control device;

[0051] Step 3: Set the temperature of the high-pressure steam sterilizer to the calibrated temperature Ts, set the sterilization time to 30 minutes, and start heating;

[0052] Step 4: When the temperature display value of the high-pressure steam sterilizer reaches the set temperature, the sterilization countdown begins. After 10 minutes, the temperature sensor temperature data is read through the data analysis control device. One data is tested every minute for a total of 10 times, recorded as T1, T2, ..., T 10 , whose average value is Simultaneously observe the temperature display value T of the high pressure steam sterilizer at this time x1 , T x2 , ..., T x10 , whose average value is

[0053] Step 5: Calculate the sterilizer temperature deviation, where the deviation Temperature fluctuation of the autoclave chamber ΔT j = ±(T max -T min ) / 2; where T max is the maximum value of 10 test data, T min is the minimum value of 10 test data. The actual pressure value inside the sterilizer cavity can be obtained through the ideal gas state equation.

[0054] The beneficial effects of the present invention include:

[0055] 1. Aiming at the problem of lack of energy efficiency test method and calculation formula for high-energy-consuming equipment high-pressure steam sterilizer in laboratory, the present invention starts with the pressure-free heating energy efficiency, high-pressure heating energy efficiency and constant temperature energy efficiency test of high-pressure steam sterilizer, studies the energy efficiency test method of high-pressure steam sterilizer, and derives and summarizes the energy efficiency test calculation method of high-pressure steam sterilizer.

[0056] 2. The present invention provides a basis and reference for the energy efficiency test method of high-pressure steam sterilizers. By identifying the energy consumption of equipment, it indirectly promotes the technical upgrading and energy efficiency control of the equipment, ultimately achieving the purpose of energy saving and consumption reduction, promoting the development and progress of industry technology, and also contributing to building a green laboratory.

[0057] 3. The present invention obtains the non-pressure heating energy efficiency, high-pressure heating energy efficiency and constant temperature energy efficiency according to the different working states of the high-pressure steam sterilizer. The energy efficiency of the tested high-pressure steam sterilizer under different working states can be further compared. At the same time, for sterilizers of different uses, the application value of these three energy efficiencies is different. For example, for high-pressure steam sterilizers that are rarely used, each use needs to start from room temperature for sterilization, then such sterilizers need to focus on C1, C2 and C3; and for some long-term sterilizers (such as those used in hospital supply rooms), the sterilizer cavity is always in a preheating state, then it is necessary to focus on C2 and C3. The real-time temperature in the cavity of the high-pressure steam sterilizer can be grasped by the sterilizer temperature energy efficiency test device, and the sterilization completion status can be judged at the first time by the sterilization indicator card image recognizer. These two parameters are the basis for energy efficiency testing of the sterilizer. Through the exhaust recording device, the temperature rise of the sterilizer can be divided into two parts, and the different energy efficiencies of the two parts can be accurately calculated. The calculation formulas of the two parts have different reference constants, and the results are more accurate.

[0058] 4. The present invention adopts a sterilization indicator card image recognizer to perform image recognition on the sterilization indicator card, judge the color grayscale of the indicator color block on the standard indicator card, and further confirm whether the sterilization conditions are met. It is unified and conducive to the accurate and reliable calculation of the sterilization energy consumption of the high-pressure sterilizer.

[0059] 5. The present invention uses a data transmitter and a data receiver to fit inside and outside the cavity of the high-pressure steam sterilizer, and uses the cavity of the high-pressure steam sterilizer as a carrier for signal transmission. The signal is transmitted by microwave, which effectively solves the problem of wireless signal shielding and the inability to ensure airtightness of wired signals. Real-time transmission of temperature data and sterilization conditions can be achieved. The problem of leakage in the traditional use of thermocouples (with a minimum wire diameter of 0.7 mm) leading to errors in temperature and energy efficiency measurement has been solved. At the same time, the problem of the inability of traditional wireless data acquisition instruments to communicate in real time to obtain actual temperature data in the cavity has been solved.

[0060] 6. This invention is aimed at the field of Beautiful China and energy, and at the large energy consumer in the laboratory: high-pressure steam sterilizer. It conducts energy efficiency testing and analysis in combination with my country's specific conditions, promotes the improvement of the energy efficiency of high-pressure steam sterilizers, strongly supports my country's green, sustainable and high-quality development, and helps epidemic prevention and control and people's life and health.

[0061] 7. This invention meets the requirements of serving the construction of ecological civilization. Carry out research and application of key measurement and testing technologies in key areas such as industrial energy conservation and building energy conservation. Research on energy efficiency test methods for high-energy-consuming experimental equipment high-pressure steam sterilizers will enhance the product progress and development of related companies, promote industrial upgrading and transformation, and promote green, efficient and sustainable development strategies.

[0062] 8. This invention draws on existing standards in the field of energy efficiency at home and abroad, and combines my country's specific conditions. Based on the principles of science, openness, applicability and promotion of energy efficiency, energy conservation and emission reduction in my country's laboratories, it conducts in-depth research on the energy-saving requirements of my country's high-pressure steam sterilizers, actively promotes energy efficiency improvement, and develops an energy efficiency test method for high-pressure steam sterilizers currently used in my country. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a composition diagram of the temperature energy efficiency testing device for a high-pressure steam sterilizer of the present invention.

[0064] Figure 2 It is a detailed diagram of the composition of the temperature energy efficiency testing device for a high-pressure steam sterilizer of the present invention.

[0065] Figure 3 It is the temperature, pressure-time diagram of the high-pressure steam sterilizer of the present invention. The sterilization process of the high-pressure steam sterilizer is divided into three stages, namely, the pressureless temperature rise stage, the high-pressure temperature rise stage, and the constant temperature stage. When the high-pressure steam sterilizer starts working (0-21 minutes), the automatic exhaust valve is in an open state, and the interior of the high-pressure steam sterilizer cavity is in a temperature rise state, but due to the opening of the exhaust valve, the internal and external pressures are basically in a balanced state, and the pressure at this stage is basically equivalent to the atmospheric pressure. When the exhaust valve is closed, the high-pressure steam sterilizer begins a high-pressure temperature rise state (21 minutes-31 minutes), and the pressure of the closed cavity rises rapidly as the temperature rises. When the temperature in the cavity of the high-pressure steam sterilizer reaches the set temperature within ±1°C, the high-pressure steam sterilizer starts sterilization work. This stage is the constant temperature sterilization stage (after 31 minutes), at which time the temperature and pressure in the cavity are basically kept constant until the sterilization is completed.

[0066] Figure 4 It is a structural diagram of the test bracket of the present invention.

[0067] Figure 5 It is a structural diagram of the test platform and related components of the present invention.

[0068] Among them, 1-intracavity data acquisition device, 2-extracavity data acquisition device, 3-data analysis and control device, 4-temperature sensor, 5-standard sterilization indicator card, 6-test bracket, 7-sterilization indicator card image recognizer, 8-data transmitter, 9-power control module, 10-energy consumption test equipment, 11-exhaust recording device, 12-data receiver, 13-data recording and analysis device, 14-control module, 15-leg, 16-pillar, 17-test platform, 18-temperature sensor connection hole, 19-sterilization indicator card image recognizer connection hole, 20-sterilization indicator card slot. DETAILED DESCRIPTION

[0069] The present invention is further described in detail with reference to the following specific examples and drawings. The process, conditions, experimental methods, etc. for implementing the present invention, except for the contents specifically mentioned below, are all common knowledge and common common sense in the art and are not particularly limited by the present invention.

[0070] The present invention provides a high-pressure steam sterilizer temperature energy efficiency test device, which is composed of an intracavity data acquisition device 1, an extracavity data acquisition device 2, and a data analysis and control device 3. The intracavity data acquisition device 1 is connected to the data analysis and control device 3 in a wireless manner, and the extracavity data acquisition device 2 is connected to the data analysis and control device (3) and the sterilizer to be tested in a wired manner.

[0071] In the present invention, the intracavity data acquisition device 1 is composed of a temperature sensor 4, a standard sterilization indicator card 5, a test bracket 6, a sterilization indicator card image recognizer 7, a data transmitter 8, and a power control module 9. The temperature sensor 4, the sterilization indicator card image recognizer 7, the data transmitter 8 and the power control module 9 are connected by wires, and the test bracket 6 and the standard sterilization indicator card 5 are connected by a card slot. The standard sterilization indicator card 5 and the sterilization indicator card image recognizer 7 are connected by non-contact through the fixing hole of the test bracket 6.

[0072] The extracavity data acquisition device is composed of an energy consumption test device 10 and an exhaust recording device 11. The energy consumption test device 10, the exhaust recording device 11 and the data analysis control device 3 are connected by wires. The exhaust recording device 11 contains a gas sensor, which is connected to the exhaust port of the high-pressure steam sterilizer under test to monitor whether the exhaust port is in the exhaust state, thereby further determining the working state of the high-pressure steam sterilizer.

[0073] The data analysis control device 3 is composed of a data receiver 12, a data recording and analyzing device 13, and a control module 14. The data receiver 12 is connected to the data recording and analyzing device 13 and the control module 14 by wires.

[0074] The test bracket 6 is composed of legs 15, pillars 16, and a test platform 17. The number of legs is generally 3 or more, and the legs are connected to the pillars by a hinge structure and fixed with fasteners. There is a ruler on the pillar, and the length of the pillar can be adjusted according to the size of the high-pressure steam sterilizer cavity to ensure that the test platform is located in the geometric middle position of the high-pressure steam sterilizer cavity. The test platform and the pillar are connected and fixed with fasteners. There are a temperature sensor connection hole 18, a sterilization indicator card image recognizer connection hole 19, and a sterilization indicator card slot 20 on the test platform 17. The test platform 17 is connected to the temperature sensor 4 through the temperature sensor connection hole 18; connected to the sterilization indicator card image recognizer 7 through the sterilization indicator card image recognizer connection hole 19; the sterilization indicator card 5 is fixed to the test platform 17 through the sterilization indicator card slot 20. The test platform 17 is connected to the power control module 9.

[0075] Intracavity data acquisition device 1: The temperature sensor 4 is composed of thermocouples, thermal resistors and other similar sensors. The collected data is transmitted to the data transmitter 8. The temperature sensor 4 is fixed on the test bracket 6. The sterilization indicator card image recognizer 7 recognizes the grayscale of the color block of the standard sterilization indicator card 5. If the standard color is reached, the signal that the sterilization effect has been achieved is transmitted to the data transmitter 8. The sterilization indicator card image recognizer 7 is fixed on the test bracket 6 when working. The data transmitter 8 is responsible for compiling and transmitting the signals transmitted by the temperature sensor 4 and the sterilization indicator card image recognizer 7. Due to the metal cavity of the high-pressure steam sterilizer and its high sealing, it is difficult to transmit the data through wireless network transmission. The data transmitter uses magnets, adhesives, bundling, etc. to attach the data transmission end to the inner shell of the cavity of the high-pressure sterilizer, and compiles the collected data and sends it out through microwaves. Outside the autoclave cavity, the data receiving end of the data receiver 12 in the data analysis and control device 3 is also attached to the outside of the autoclave cavity and the data sending end inside the cavity by means of magnets, pasting, bundling, etc., and receives the microwave signal sent by the data transmitter 8. The standard sterilization indicator card 5 is divided into two types of common sterilizer sterilization temperatures of 121°C and 134°C. It is made of standard materials, the size matches the test bracket 6, and is fixed by a card slot. During the energy efficiency test, the standard sterilization indicator card 5 is fixed to the card slot position of the test bracket 6, and the sterilization indicator card image recognizer 7 is fixed on the test bracket 6, and the bracket is fixed to the geometric center position of the autoclave sterilization cavity of the high-pressure steam sterilizer. The power control module 9 provides power for the temperature sensor 4, the sterilization indicator card image recognizer 7, and the data transmitter 8. It adopts a closed design to ensure stable operation under high pressure, high temperature and high humidity environment. It adopts a wireless charging mode. In order to ensure the airtightness of the module, no separate switch is set. When it is fixed to the test bracket 6, the intracavity data acquisition device 1 automatically turns on, and it will automatically turn off after it is removed.

[0076] Extracavity data acquisition device 2: The energy consumption test device 10 is connected to the mains and the high-pressure steam sterilizer under test to count the energy consumption during use; the connecting wire is used to connect the energy consumption test device 10 and the data analysis control device 3. When the data analysis control device 3 sends a signal to stop recording energy consumption, the energy consumption test device 10 stops recording energy consumption. The exhaust recording device 11 is installed at the automatic exhaust port of the high-pressure steam sterilizer under test and is connected to the data analysis control device 3 through a wire to analyze different stages of the energy efficiency test.

[0077] Data analysis and control device 3: The data receiving end of the data receiver 12 is attached to the outside of the autoclave cavity by means of magnets, pasting, bundling, etc., and is used to receive data in the cavity. The data recording and analysis device 13 records real-time temperature data and energy consumption data. Through calculation and analysis, the non-pressure heating energy efficiency, high-pressure heating energy efficiency, constant temperature energy efficiency, and total sterilization energy efficiency of the high-pressure steam sterilizer can be obtained. At the same time, the temperature calibration data of the high-pressure steam sterilizer can also be obtained. The control module 14 is used to control the intracavity data acquisition device 1 and / or the extracavity data acquisition device 2.

[0078] The device innovation of the present invention is:

[0079] Different from the traditional wireless transmission method, the present invention uses a data transmitter and a data receiver attached to the inside and outside of the high-pressure steam sterilizer cavity, and uses the high-pressure steam sterilizer cavity as a carrier for signal transmission. The microwave transmission effectively breaks through the problem of wireless signal shielding and the inability to ensure the airtightness of wired signals. Real-time transmission of temperature data and sterilization conditions can be achieved.

[0080] The sterilization indicator card image recognizer is used to perform image recognition on the sterilization indicator card, judge the color grayscale of the indicator color block on the standard indicator card, and further confirm whether the sterilization conditions are met. This is unified and is conducive to the accurate and reliable calculation of the sterilization energy consumption of the autoclave.

[0081] The present invention also provides an energy efficiency testing method for a high pressure steam sterilizer:

[0082] The method comprises the following steps:

[0083] Step 1: Measure the volume of the working area of ​​the high-pressure steam sterilizer, represented by V; determine the geometric center position of the high-pressure steam sterilizer cavity: the temperature sensor 4, the standard sterilization indicator card 5, and the power control module 9 are fixed on the test bracket 6 and fixed at the geometric center position of the cavity. The intracavity data acquisition device 1 starts working, fixes the sterilization indicator card image recognizer 7 on the test bracket 6, and places its recognizer probe on the color block area indicated by the standard sterilization indicator card 5. According to the commonly used sterilization temperature of the equipment, select the corresponding standard sterilization indicator card 5 and fix it in the card slot position of the test bracket 6. Fit the data transmitter 8 inside the cavity of the high-pressure steam sterilizer.

[0084] Step 2: Connect the energy consumption test equipment 10 to the power supply and mains of the high-pressure steam sterilizer under test; connect the energy consumption test equipment 10 to the data analysis control device 13; attach the data receiving end of the data receiver 12 of the data analysis control device 3 to the outside of the cavity of the high-pressure steam sterilizer under test, start the preheating high-pressure steam sterilizer temperature energy efficiency test device, and check the internal temperature of the high-pressure steam sterilizer cavity through the data analysis control device 3. The exhaust recording device 11 is installed at the automatic exhaust port of the high-pressure steam sterilizer under test and is connected to the data analysis control device 3 through a wire.

[0085] Step 3: Set the temperature of the high-pressure steam sterilizer to the commonly used sterilization temperature, which should be consistent with the corresponding temperature on the standard sterilization indicator card 5 (generally 121°C or 134°C), close the manual exhaust port of the high-pressure steam sterilizer, open the automatic exhaust port of the high-pressure steam sterilizer, set the sterilization time to 30 minutes, and add purified water for sterilization to the rated water level line.

[0086] Step 4: The high-pressure steam sterilizer has been fully dried before the test. Under no-load conditions, the power supply is connected to start heating up. At the same time, the energy consumption test equipment starts recording energy consumption;

[0087] Step 5: Determine the heating energy efficiency: The heating energy efficiency is divided into two parts: non-pressure heating energy efficiency C1 and high-pressure heating energy efficiency C2; the non-pressure heating energy efficiency is the energy efficiency generated from the start of heating of the high-pressure steam sterilizer to the end of exhaust at the automatic exhaust port, and the high-pressure heating energy efficiency is the energy efficiency generated from the end of exhaust at the high-pressure steam sterilizer to the heating to the set temperature. After starting work, the temperature sensor 4 measures the actual temperature t1 at the center of the high-pressure steam sterilizer cavity at this time. When the exhaust recording device 11 detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the energy consumption test equipment 10 stops recording the energy consumption. The energy consumption recorded at this stage is E1. The temperature sensor 4 measures the actual temperature t2 at the center of the high-pressure steam sterilizer cavity at this time. At this stage, the automatic exhaust port of the high-pressure sterilizer is in the open stage, and the internal pressure of the cavity is consistent with the external atmospheric pressure, so the non-pressure heating energy efficiency C1 can be obtained.

[0088] After the high-pressure steam sterilizer is exhausted and the exhaust recording device 11 detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the energy consumption testing equipment 10 starts to record the high-pressure heating energy consumption. When the cavity temperature sensor 4 detects that the cavity temperature of the high-pressure steam sterilizer reaches the set temperature ±1°C, the energy consumption testing equipment 10 stops recording the high-pressure heating energy consumption. The energy consumption at this stage is E2. The actual temperature t3 at the center of the cavity of the high-pressure steam sterilizer is measured by the temperature sensor 4. At this stage, the automatic exhaust port of the high-pressure steam sterilizer is in the closed stage. The sterilizer cavity pressure will increase with the increase of temperature, and the high-pressure heating energy efficiency C2 can be obtained.

[0089] According to the formula, the non-pressure heating energy efficiency C1 and the high-pressure heating energy efficiency C2 are obtained respectively.

[0090] C1=E1 / [(t2-t1)·c1·V·ρ1]

[0091] Where C1 is the non-pressure heating efficiency under the empty furnace heating test, the unit is 1, c1 is the specific heat capacity of air in the initial state, V is the volume of the high-pressure steam sterilizer cavity, and ρ1 is the density of air in the initial state.

[0092] C2=E2 / [(t3-t2)·c2·V·ρ2]

[0093] Where C2 is the high pressure heating energy efficiency under the empty furnace heating test, the unit is 1, c2 is the specific heat capacity of water vapor at the temperature t2, V is the volume of the high pressure steam sterilizer cavity, and ρ2 is the density of water vapor at the temperature t2.

[0094] Step 6: Determine the constant temperature energy efficiency: Sterilization starts after the cavity temperature reaches the preset sterilization temperature ±1°C, and the energy consumption test equipment 10 starts the third stage of recording. During the sterilization process, the color of the indication area of ​​the standard sterilization indicator card 5 will gradually darken, and the sterilization indicator card image recognizer 7 will continuously recognize the color grayscale of the indication area. When the color grayscale reaches the preset value, the sterilization indicator card image recognizer 7 will send a sterilization standard signal, which is sent to the data receiver 12 of the data analysis and control device 3 through the cavity data transmitter 8, and the energy consumption test equipment 10 will be controlled to stop recording energy consumption. The energy consumption at this stage is E3. The constant temperature energy efficiency C3 is calculated as follows:

[0095] C3=E3 / V

[0096] Where, C3 is the constant temperature energy efficiency, in joules per cubic meter; E3 is the power consumption of the constant temperature test, in joules; V is the volume of the high-pressure steam sterilizer cavity;

[0097] Step 7: Calculate the total sterilization energy efficiency: The total sterilization energy consumption of the high-pressure steam sterilizer E = E1 + E2 + E3; the total sterilization energy efficiency C is calculated by the following formula:

[0098] C=(E1+E2+E3) / V

[0099] Where, C is the total sterilization energy efficiency, in joules per cubic meter; V is the volume of the high-pressure steam sterilizer cavity;

[0100] The characteristics of the test method in the present invention are: the non-pressure heating energy efficiency, high-pressure heating energy efficiency and constant temperature energy efficiency are obtained according to the different working states of the high-pressure steam sterilizer. The energy efficiency of the tested high-pressure steam sterilizer under different working states can be further compared. At the same time, for sterilizers of different uses, the application value of these three energy efficiencies is different. For example, for high-pressure steam sterilizers that are rarely used, each use needs to be heated from room temperature for sterilization, then such sterilizers need to focus on C1, C2 and C3; and for some long-term sterilizers (such as those used in hospital supply rooms), the sterilizer cavity is always in a preheating state, then it is necessary to focus on C2 and C3. The real-time temperature in the cavity of the high-pressure steam sterilizer can be grasped by the sterilizer temperature energy efficiency test device, and the sterilization completion status can be judged at the first time by the sterilization indicator card image recognizer. These two parameters are the basis for energy efficiency testing of the sterilizer. Through the exhaust recording device, the temperature rise of the sterilizer can be divided into two parts, and the different energy efficiencies of the two parts can be accurately calculated. The calculation formulas of the two parts have different reference constants, and the results are more accurate.

[0101] The present invention also proposes a high-pressure steam sterilizer temperature calibration test method, which solves the problem of real-time calibration of high-pressure steam sterilizer temperature parameters. The method comprises the following steps:

[0102] Step 1: Determine the geometric center position of the high-pressure steam sterilizer cavity: The temperature sensor 4 and the power control module 9 are fixed on the test bracket 6, the intracavity data acquisition device 1 starts working, and the data transmitter 8 is attached to the inner shell of the high-pressure steam sterilizer cavity.

[0103] Step 2: Fit the data receiving end of the data receiver 12 in the data analysis and control device 3 to the corresponding positions of the data sending end outside the cavity of the high-pressure steam sterilizer to be tested and inside the cavity, start the preheating high-pressure steam sterilizer temperature energy efficiency test device 10, and the internal temperature of the high-pressure steam sterilizer cavity can be checked through the data analysis and control device 3.

[0104] Step 3: Set the autoclave temperature to the calibrated temperature T s , set the sterilization time to 30 minutes and start heating.

[0105] Step 4: When the temperature display value of the high-pressure steam sterilizer reaches the set temperature, the sterilization countdown begins. After 10 minutes, the data analysis control device 3 starts to read the temperature data of the temperature sensor 4. One data is tested every minute for a total of 10 times, which are recorded as T1, T2, ..., T 10 The average value is Simultaneously observe the temperature display value T of the high pressure steam sterilizer at this time x1 , T x2 , ..., T x10 The average value is

[0106] Step 5: Calculate the sterilizer temperature deviation, where the deviation Temperature fluctuation of the autoclave chamber ΔT j = ±(T max -T min ) / 2. Where T max is the maximum value of 10 test data, T min is the minimum value of 10 test data. The actual pressure value inside the sterilizer cavity can be obtained through the ideal gas state equation.

[0107] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the attached claims.

Claims

1. A high pressure steam sterilizer temperature energy efficiency test device, characterized in that: The testing device comprises an intracavity data acquisition device (1), an extracavity data acquisition device (2), and a data analysis and control device (3); The intracavitary data acquisition device (1) is connected to the data analysis and control device (3) in a wireless manner, and the extracavitary data acquisition device (2) is connected to the data analysis and control device (3) and the sterilizer under test respectively via wires; The intracavity data acquisition device (1) is composed of a temperature sensor (4), a standard sterilization indicator card (5), a test bracket (6), a sterilization indicator card image recognizer (7), a data transmitter (8), and a power control module (9); the temperature sensor (4), the sterilization indicator card image recognizer (7), the data transmitter (8), and the power control module (9) are respectively connected by wires; the standard sterilization indicator card (5) is contactlessly connected to the sterilization indicator card image recognizer (7); The extracavity data acquisition device (2) comprises an energy consumption test device (10) and an exhaust recording device (11); the exhaust recording device (11) is connected to the data analysis control device (3) and the energy consumption test device (10) via a wire, and the exhaust recording device (11) contains a gas sensor connected to the exhaust port of the sterilizer under test to monitor whether the exhaust port is in an exhaust state; the energy consumption test device (10) is powered by the mains and is connected to the power supply end of the sterilizer under test via a wire to count the energy consumption of the sterilizer under test during use; The data analysis control device (3) comprises a data receiver (12), a data recording and analysis device (13), and a control module (14); the data receiver (12), the data recording and analysis device (13), and the control module (14) are connected by wires; the data receiver (12) is provided with a data receiving end, which is attached to a position close to the outside of the sterilizer cavity to be tested and the corresponding position of the data sending end inside the cavity, and receives the microwave signal sent by the data transmitter (8); the data recording and analysis device (13) records real-time temperature data and energy consumption data, and obtains the pressure-free heating energy efficiency, high-pressure heating energy efficiency, constant temperature energy efficiency, total sterilization energy efficiency, and temperature calibration data of the high-pressure steam sterilizer through calculation and analysis; the control module (14) is used to control the intracavity data acquisition device (1) and / or the extracavity data acquisition device (2); The temperature sensor (4) comprises a thermocouple and a thermal resistor, and collects temperature data in the sterilizer cavity to be tested and transmits the data to the data transmitter (8); the sterilization indicator card image recognizer (7) recognizes the grayscale of the color of the indicator color block of the standard sterilization indicator card (5), and if the grayscale reaches the standard color, transmits a signal indicating that the sterilization effect has been achieved to the data transmitter (8); the data transmitter (8) is responsible for compiling and transmitting the signals transmitted by the temperature sensor (4) and the sterilization indicator card image recognizer (7); the power control module (9) is used to provide power to the temperature sensor (4), the sterilization indicator card image recognizer (7), and the data transmitter (8).

2. The testing device according to claim 1, characterized in that: The data transmitter (8) is provided with a data transmitting end, which is attached to the inner shell of the cavity of the sterilizer to be tested, compiles the collected data, and transmits it by microwave.

3. The testing device according to claim 1, characterized in that: The test bracket (6) is composed of legs (15), pillars (16), and a test platform (17); the number of the legs (15) is ≥3, the legs (15) and the pillars (16) are connected by a hinge structure and fixed by fasteners; a scale is provided on the pillars (16), and the position of the test platform (17) in the tested sterilizing pot is controlled by adjusting the length of the pillars (16); the test platform (17) and the pillars (16) are connected and fixed by fasteners.

4. The testing device according to claim 3, characterized in that: The test platform (17) is provided with a temperature sensor connection hole (18), a sterilization indicator card image recognizer connection hole (19), and a sterilization indicator card slot (20); the temperature sensor (4) is installed in the temperature sensor connection hole (18), the sterilization indicator card image recognizer (7) is installed in the sterilization indicator card image recognizer connection hole (19), and the standard sterilization indicator card (5) is inserted into the sterilization indicator card slot (20).

5. An energy efficiency testing method using the testing device according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: Measure the volume V of the working area of ​​the high-pressure steam sterilizer to be tested, and determine the geometric center position of the cavity; install the intracavity data acquisition device (1) in the high-pressure steam sterilizer to be tested, with the test bracket (6) located at the geometric center position of the cavity, and attach the data transmitter (8) to the inner shell of the high-pressure steam sterilizer cavity; Step 2: attach the data receiving end of the data receiver (12) in the data analysis control device (3) to the position close to the corresponding data sending end outside the cavity of the high-pressure steam sterilizer to be tested and inside the cavity, start the preheating high-pressure steam sterilizer temperature energy efficiency test device, and check the internal temperature of the high-pressure steam sterilizer cavity through the data analysis control device (3); Step 3: Set the temperature of the high-pressure steam sterilizer to the sterilization temperature consistent with the temperature corresponding to the standard sterilization indicator card (5), close the manual exhaust port of the high-pressure steam sterilizer, open the automatic exhaust port of the high-pressure steam sterilizer, set the sterilization time to 30 minutes, and add purified water for sterilization to the rated water level line; Step 4: Under no-load condition, connect the power supply to start heating up, and at the same time, the energy consumption test equipment (10) starts recording the energy consumption; Step 5: After starting the work, the actual temperature t1 at the center of the cavity of the high-pressure steam sterilizer is measured by the temperature sensor. When the exhaust recording device (11) detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the energy consumption testing device (10) stops recording the energy consumption. The energy consumption recorded in this stage is E1. The actual temperature t2 at the center of the cavity of the high-pressure steam sterilizer is measured by the temperature sensor (4). The above data are used to calculate the non-pressure heating energy efficiency C1. When the exhaust recording device (11) detects that the automatic exhaust port of the high-pressure steam sterilizer has finished exhausting, the automatic exhaust port is closed, and the energy consumption test device (10) starts to record the high-pressure heating energy consumption. When the cavity temperature sensor (4) detects that the cavity temperature of the high-pressure steam sterilizer reaches the set temperature ±1°C, the energy consumption test device (10) stops recording the high-pressure heating energy consumption. The energy consumption at this stage is E2. The actual temperature t3 at the center of the cavity of the high-pressure steam sterilizer is measured by the temperature sensor (4). The high-pressure heating energy efficiency C2 is calculated using the above data. In step 5, the calculation method of the non-pressure heating energy efficiency C1 is as follows: C1=E1 / [(t2-t1)·c1·V·ρ1]; Among them, C1 is the non-pressure heating energy efficiency under the empty furnace heating test, the unit is 1, c1 is the specific heat capacity of air in the initial state, V is the volume of the high-pressure steam sterilizer cavity, ρ1 is the density of air in the initial state; The calculation method of the high pressure heating energy efficiency C2 is as follows: C2=E2 / [(t3-t2)·c2·V·ρ2]; Among them, C2 is the high pressure heating energy efficiency under the empty furnace heating test, the unit is 1, c2 is the specific heat capacity of water vapor at the temperature t2, V is the volume of the high pressure steam sterilizer cavity, ρ2 is the density of water vapor at the temperature t2; Step 6: After the temperature in the cavity reaches the preset sterilization temperature ±1°C, sterilization begins, and the energy consumption test device (10) starts recording in the third stage; during the sterilization process, when the grayscale of the color of the indication area of ​​the standard sterilization indicator card (5) reaches the preset value, the sterilization indicator card image recognizer (7) sends a sterilization standard reaching signal, which is sent to the data receiver (12) in the data analysis control device (3) through the cavity data transmitter (8), and the energy consumption test device (10) is controlled to stop recording energy consumption. The energy consumption in this stage is E3, and the constant temperature energy efficiency C3 is calculated; In step 6, the constant temperature energy efficiency C3 is calculated as follows: C3=E3 / V; Among them, C3 is the constant temperature energy efficiency, the unit is joule per cubic meter; E3 is the power consumption of the constant temperature test, the unit is joule; V is the volume of the high pressure steam sterilizer cavity; Step 7: Calculate the total sterilization energy efficiency of the high-pressure steam sterilizer according to the non-pressure heating energy efficiency C1, high-pressure heating energy efficiency C2, constant temperature energy efficiency C3 and the working area volume V of the high-pressure steam sterilizer.

6. The energy efficiency testing method according to claim 5, characterized in that: In step 7, the calculation method of the total sterilization energy efficiency C is as follows: C = (E1 + E2 + E3) / V; Where C is the total sterilization energy efficiency, measured in joules per cubic meter; V is the volume of the high-pressure steam sterilizer cavity.

7. A method for temperature calibration test of a high pressure steam sterilizer using the test device according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: Determine the geometric center position of the high-pressure steam sterilizer cavity. Install the cavity data acquisition device (1) in the high-pressure steam sterilizer to be tested, and the test bracket (6) is located at the geometric center position of the cavity. The cavity data acquisition device starts to work, and the data transmitter (8) is attached to the inner shell of the high-pressure steam sterilizer cavity; Step 2: attaching the data receiving end of the data receiver (12) in the data analysis control device (3) to the position close to the corresponding data sending end outside the cavity of the high-pressure steam sterilizer to be tested and inside the cavity, starting the preheating high-pressure steam sterilizer temperature energy efficiency test device, and checking the internal temperature of the high-pressure steam sterilizer cavity through the data analysis control device (3); Step 3: Set the temperature of the high-pressure steam sterilizer to the calibrated temperature Ts, set the sterilization time to 30 minutes, and start heating; Step 4: When the temperature display value of the high-pressure steam sterilizer reaches the set temperature, the sterilization countdown begins. After 10 minutes, the data analysis control device (3) begins to read the temperature data of the temperature sensor (4). One data is tested every minute for a total of 10 times, which are recorded as T1, T2, ..., T 10 , the average value is n = 10; Simultaneously observe the temperature display value T of the high pressure steam sterilizer at this time x1 , T x2 , ..., T x10 , whose average value is n = 10; Step 5: Calculate the sterilizer temperature deviation, where the deviation Temperature fluctuation of the autoclave chamber ΔT j = ±(T max -T min ) / 2; where T max is the maximum value of 10 test data, T min is the minimum value of 10 test data; the actual pressure value inside the sterilizer cavity is obtained through the ideal gas state equation.

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