Temperature difference analysis and energy efficiency test device for dry thermostat

Abstract

The utility model discloses a temperature difference analysis and energy efficiency testing device for a dry thermostat. The device comprises an isothermal heat absorption module, a temperature measuring device, an energy consumption measuring device and a standard thermostat, the temperature measuring device is connected with the energy consumption measuring device through a connecting wire, the isothermal heat absorption module is connected with the temperature measuring device in a matched mode, and a temperature measuring thermal resistor is arranged in the temperature measuring device and can be inserted into the isothermal heat absorption module with the temperature measuring function of the isothermal heat absorption module in a matched mode. The isothermal heat absorption module comprises a common isothermal heat absorption module and / or a belt temperature measurement isothermal heat absorption module, and the temperature measurement device comprises a central point temperature measurement sensor, a peripheral temperature measurement sensor, a data acquisition and recording device, a temperature difference analysis device and a temperature measurement fixing support. The energy consumption measuring device comprises energy consumption testing equipment, a quality measuring device and a control module.

Description

[0001] This application is a divisional application of the Chinese utility model patent application with the application date of August 1, 2023, application number 202322045438.9, and the utility model name being a dry thermostat energy efficiency testing device. Technical Field

[0002] The utility model belongs to the technical field of thermostat energy efficiency testing and relates to a dry thermostat energy efficiency testing device. Background Art

[0003] With the progress of science and technology, especially the enhancement of metal temperature control accuracy, constant temperature metal baths have gradually replaced traditional water baths with their fast heating speed, portability and convenience, and have become important heating and constant temperature devices in laboratories. Constant temperature metal baths are widely used in production and experiments in the fields of microbial detection, environmental monitoring, biological detection, pharmaceutical synthesis, food testing, special material preparation, etc., and have considerable application prospects. For example, in the medical field, dry thermostats have replaced traditional water bath heating methods and are used in enzyme preparation reactions, serum inactivation tests, Rb blood sample research, cholesterol testing and other fields; in the field of environmental monitoring, COD meters are used to quantitatively detect chemical oxygen demand, etc., and are widely used in colleges and universities, scientific research institutes and inspection and testing institutions, and have wide application value. The maximum operating temperature of a constant temperature metal bath is usually 150℃ to 250℃, with metal plates as the heating medium, and the working time is generally several hours or even days. The rated power is usually several kilowatts, and it needs to have a fast heating capability. With high requirements for continuous operation and short start-stop heating time, it gradually replaces the traditional water bath pot. Due to its long service life and high temperature, it has become one of the high energy consumption equipment in the laboratory. Affected by many factors such as scientific research and technology level, the distribution of laboratories of colleges and universities, scientific research monitoring institutions and industrial and mining enterprises, and market demand, constant temperature metal bath manufacturers are mainly distributed in Beijing, the Pearl River Delta and the Yangtze River Delta where colleges and universities and scientific research institutes are concentrated. At present, due to the lack of a unified constant temperature metal bath energy efficiency test device, users of this type of product cannot compare the energy efficiency of products from various manufacturers. Manufacturers and users blindly pursue the lowest price and ignore the energy consumption of products. Through the constant temperature metal bath energy efficiency test device, the evaluation basis of the constant temperature metal bath energy efficiency test is standardized, authoritative data is provided for the promotion of energy-saving equipment, high energy-consuming products are gradually eliminated, and technical basis is provided for national energy conservation and emission reduction measures. Research and formulate reasonable and feasible energy efficiency test methods, and establish unified, scientific and effective technical support for the classification of constant temperature metal bath energy efficiency grades, which will further promote the development and progress of industry technology and contribute to the creation of green laboratories. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model aims to provide a thermostat energy efficiency testing device.

[0005] The utility model provides a dry thermostat energy efficiency test device, which is used for energy efficiency measurement of a constant temperature metal bath, and comprises an isothermal heat absorption module, a temperature measurement device, an energy consumption measurement device, and a standard thermostat;

[0006] The temperature measuring device is connected to the energy consumption measuring device by a connecting line; the isothermal heat absorption module is matched with the temperature measuring device, and the temperature measuring device has a temperature measuring thermal resistor, which can be matched with the isothermal heat absorption module with temperature measurement.

[0007] The isothermal heat absorption module includes an ordinary isothermal heat absorption module and / or an isothermal heat absorption module with temperature measurement. The ordinary isothermal heat absorption module and the isothermal heat absorption module with temperature measurement are made of materials with stable thermal conductivity and good performance (such as metals, liquids, etc., specifically, standard copper, standard platinum, oil, ethanol, etc. can be used. The material of the isothermal heat absorption module generally needs to select a material whose specific heat capacity changes less with temperature). There is a temperature measurement hole for fixing the temperature measurement sensor on the isothermal heat absorption module with temperature measurement, and it goes deep into the center of the module. The ordinary isothermal heat absorption module and the isothermal heat absorption module with temperature measurement are composed of two parts: an outer shell and an inner filling. The two parts can be of the same material or different materials. The materials of the outer shell and the inner filling have a measurable and quantifiable specific heat capacity. The common isothermal heat absorption module is composed of particles of uniform shape, each particle is a common isothermal heat absorption module, the shape of the common isothermal heat absorption module can be round or square, or other possible regular shapes can be selected according to actual needs, but it has good stacking performance to ensure that it has good thermal conductivity; the shape and size of the isothermal heat absorption module with temperature measurement are similar to those of the common isothermal heat absorption module, which can be round or square or other possible regular shapes. The number of isothermal heat absorption modules with temperature measurement is 5 to 6 each time, one is arranged at the center test hole position of the constant temperature metal bath to be measured (if the single center test hole cannot be determined, 2 symmetrical center test holes are arranged), and the remaining several are arranged at the test holes around the constant temperature metal bath to achieve uniform and symmetrical arrangement, and the test holes on the other thermostats without the isothermal heat absorption module with temperature measurement are filled with common isothermal heat absorption modules to ensure that the isothermal heat absorption module with temperature measurement is at the center position of the heating hole of the constant temperature metal bath. The number of common isothermal heat absorption modules is determined according to the size of the heating holes of the constant temperature metal bath, so that it fills the rated metal heating area of ​​each heating hole of the constant temperature metal bath. Common isothermal heat absorption modules and temperature measuring isothermal heat absorption modules have the same specific heat capacity c (unit: J / (Kg·℃)).

[0008] The temperature measuring device includes a central point temperature sensor, surrounding temperature sensors, a data acquisition and recording device, a temperature difference analysis device, and a temperature measurement fixed bracket. The data acquisition and recording device is connected to the isothermal heat absorption module with temperature measurement arranged at the central position through the central point temperature sensor, and the data acquisition and recording device and / or the temperature difference analysis device are connected to the isothermal heat absorption module with temperature measurement arranged at the surrounding positions through the surrounding temperature sensors. The central point temperature sensor adopts temperature sensors including platinum thermal resistors, copper thermal resistors, and thermocouples; the surrounding temperature sensors adopt thermal resistors (including platinum thermal resistors, copper thermal resistors, etc.), the central point temperature sensor is connected to the data acquisition and recording device, the central point temperature sensor is fixedly connected to the central position of the isothermal heat absorption module with temperature measurement through the temperature measurement hole of the isothermal heat absorption module with temperature measurement, and the number of temperature sensors including the central point temperature sensor and the surrounding temperature sensors is consistent with the number of isothermal heat absorption modules with temperature measurement. The data acquisition and recording device is a multi-channel synchronous data real-time acquisition mode, which can synchronously collect the data of the center point temperature sensor (the number of the center point temperature sensor is one or more, which can be 1 to 2 in the present utility model), and can simultaneously obtain the temperature data of the center point of the constant temperature metal bath to calculate the average temperature value of the center point of the constant temperature metal bath. During the test, the temperature values ​​of the surrounding temperature sensors can also be tested as needed. The temperature measurement fixed bracket is composed of a center point temperature sensor socket, a surrounding temperature sensor socket, a data acquisition and recording device connection port, and a temperature difference analysis device connection port. The temperature measurement fixed bracket is not limited to a specific material, and can be made of copper, iron, aluminum alloy, plastic and other materials, which are used to fix the center point temperature sensor and the surrounding temperature sensors, making the entire test process more systematic, neatly connected, and not messy in wiring. At the same time, the circuit also plays a role in switching the connection between the surrounding temperature sensors and the data acquisition and recording device, and the connection between the surrounding temperature sensors and the temperature difference analysis device, so as to realize the switching of the surrounding temperature sensors for temperature testing and temperature difference testing. The temperature difference analysis device is connected to the temperature sensor interfaces around the temperature measuring bracket, and adopts the bridge circuit principle to judge the temperature uniformity of the surrounding temperature measuring sensors by testing the bridge current formed by the surrounding temperature measuring sensors.

[0009] The energy consumption measuring device includes an energy consumption test device, a mass measuring device, and a control module. The control module is connected to the energy consumption test device and / or the mass measuring device through a physical or virtual connection. The physical connection refers to connection through a physical wire, and the virtual connection refers to connection through wireless connection forms such as wifi and Bluetooth. In actual application, it can also be disconnected by directly inputting instructions on the energy consumption test device or the mass measuring device. The control module is also connected to the data acquisition and recording device of the temperature measuring device and / or the temperature difference analysis device through a wire. The control module connects the data acquisition and recording device of the temperature measuring device with the energy consumption test device to control the recording and stopping of the energy consumption of the heating process and the constant temperature process. The mass measuring device is used to measure the mass of the isothermal heat absorption module so as to further calculate the overall heat absorption of the constant temperature metal bath.

[0010] The standard thermostat can be an air bath or a liquid bath, with a temperature fluctuation requirement of ≤0.05°C and a temperature uniformity requirement of ≤0.10°C. The standard thermostat is used to maintain a constant starting temperature of the isothermal heat absorption module to ensure that the heat absorbed by the isothermal heat absorption module can be quantified during each energy consumption measurement.

[0011] The utility model also discloses a dry thermostat energy efficiency test method. The details are as follows:

[0012] 1. Check whether the thermostat energy efficiency test device is working properly. Generally, the power-on preheating time should not be less than 30 minutes. The entire test environment temperature is controlled at 20.0℃±1.0℃, and the humidity is controlled within the range of 50%RH±3%rH.

[0013] 2. Place the isothermal endothermic module (including ordinary isothermal endothermic module, isothermal endothermic module with temperature measurement and matching temperature sensor) in a standard thermostat (generally set at 20°C). The standard thermostat can be an air bath or a liquid bath. The temperature fluctuation is required to be ≤0.05°C and the temperature uniformity is required to be ≤0.10°C. The isothermal start time is when the temperature of the temperature sensor reaches the standard thermostat temperature within ±0.10°C. The isothermal time is ≥2h to ensure that the ordinary isothermal endothermic module and the isothermal endothermic module with temperature measurement can fully reach the control temperature of the standard thermostat.

[0014] 3. Connection: Connect the temperature measuring device and energy consumption measuring device of the thermostat energy efficiency test device with wires, connect the temperature measuring sensor of the temperature measuring device with the temperature measuring fixed bracket, and connect the temperature measuring fixed bracket with the temperature acquisition and recording device with compensation wires. Connect the temperature acquisition and recording device with the control module of the energy consumption measurement module, and connect the energy consumption test equipment, quality measurement device and control module of the energy consumption measurement device, and the energy consumption measurement device with the mains with wires. Connect the surrounding temperature sensors with the temperature difference analysis device.

[0015] 4. Insert the temperature sensor into the center of the isothermal endothermic module with temperature measurement and secure it.

[0016] 5. Place the common isothermal endothermic module and the isothermal endothermic module with temperature measurement into the heating holes of the constant temperature metal bath to be measured. The number of isothermal endothermic modules with temperature measurement for each measurement is n, generally 5 to 6. One is arranged at the center point of the constant temperature metal bath to be measured (if the single center point cannot be determined, 2 are arranged in the symmetrical holes at the center point), and the remaining 4 are arranged around the constant temperature metal bath to achieve a uniform and symmetrical arrangement, and then use the common isothermal endothermic module to fill it sufficiently. The common isothermal endothermic module fills all the heating holes of the constant temperature metal bath. The mass of a single isothermal endothermic module with temperature measurement is m0, and the mass of the filled common isothermal endothermic module is measured by the mass measuring device as m1, so the total mass of the isothermal endothermic module is M=m1+nm0.

[0017] 6. Determination of the energy consumption of constant temperature metal bath heating: The isothermal heating module is preheated to a constant temperature of t0, and the constant temperature metal bath heating temperature is set to t s (This temperature is the heating temperature commonly used in experiments required for a constant temperature metal bath, such as 100°C or 150°C, etc.), the power is 100%, and when the constant temperature metal bath starts to heat, the energy consumption of the energy consumption test equipment instantly increases, and at this time the energy consumption test equipment starts to record the process energy consumption; the data acquisition and recording device records in real time the center point temperature of the isothermal heat absorption module with temperature measurement of each heating hole (when the isothermal heat absorption module with temperature measurement is set to 1, the temperature is recorded as t1; when the isothermal heat absorption modules with temperature measurement are two centrally symmetrical, the temperatures recorded by the two heat absorption modules are t1 and t2 respectively, and the average temperature of the two isothermal heat absorption modules with temperature measurement needs to be taken later); the real-time average temperature is obtained. when When the temperature difference data t c ≤t cs When the energy consumption measurement equipment stops recording energy consumption, the energy consumption during the test is E1. Then the heating energy efficiency is C1=E1 / [(t s -t0)·c·M]; t cs is the preset heating state temperature difference data threshold, t c It is the temperature difference data in heating state;

[0018] 7. Constant temperature energy consumption measurement of constant temperature metal bath: The constant temperature of the constant temperature metal bath is the set temperature Θ s After stabilization for 1 hour, the energy consumption test equipment starts to record the process energy consumption and time when the constant temperature metal bath heater is disconnected from the power supply; the data acquisition and recording device records the center point temperature Θ1, Θ2, ..., Θ of the isothermal endothermic module with temperature measurement of each heating hole in real time. n ; Get the real-time average temperature when When, or the temperature difference analysis device temperature difference data Θ c >Θ cs When the control module issues an alarm, indicating that the test is invalid, after 24 hours of effective measurement, when the thermostat is disconnected from the power supply for the first time, the energy consumption measurement equipment stops recording energy consumption. The energy consumption during the test is E2 and the time is T2. Unit: J / kg; θ cs is the preset constant temperature state temperature difference data threshold, Θ c It is the temperature difference data in constant temperature state;

[0019] 8. The calculated heating energy efficiency C1 and constant temperature energy efficiency C2 can be used for energy efficiency classification in the heating and constant temperature stages.

[0020] The benefits of the utility model are:

[0021] 1. Using thermal resistors as temperature measurement sensors has the characteristics of high temperature measurement accuracy. At the same time, there is no need to add additional compensation wires to ensure that the data of each temperature measurement channel is reliable and unified.

[0022] 2. Use the temperature difference analysis device as the temperature difference analysis device of each channel, and judge the uniformity of the temperature of the surrounding temperature sensors by testing the bridge current formed by the surrounding temperature sensors. It has the characteristics of fast response speed and high measurement accuracy, and can quickly judge whether the temperature difference of the surrounding temperature sensors is within the set range.

[0023] 3. The isothermal heat absorption module is used in the form of an isothermal heat absorption module with temperature measurement to ensure that the heat absorption in the heat absorption process can be quantified. It has the characteristics of strong versatility and high stability. The isothermal heat absorption module (including ordinary isothermal heat absorption module, isothermal heat absorption module with temperature measurement and matching temperature measurement sensor) is placed in a standard thermostat (generally set to 20°C) for isothermal. The standard thermostat can be an air bath or a liquid bath. It has the characteristics of strong versatility and good uniformity of heat absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a composition diagram of the utility model dry-type thermostat energy efficiency testing device.

[0025] Figure 2 This is a detailed diagram of the isothermal heat absorption module of the utility model.

[0026] Figure 3 It is a composition diagram of the temperature measuring device of the utility model.

[0027] Figure 4 This is a detailed diagram of the temperature measuring fixing bracket of the utility model.

[0028] Figure 5 This is a principle diagram of the temperature difference analysis device of the utility model.

[0029] Figure 6 It is a schematic diagram of the arrangement of the temperature measuring sensor of the thermostat of the utility model.

[0030] Figure 7 It is a composition diagram of the energy consumption measuring device of the utility model.

[0031] In the figure, 1-isothermal heat absorption module, 2-temperature measuring device, 3-energy consumption measuring device, 4-standard thermostat, 5-ordinary isothermal heat absorption module, 6-isothermal heat absorption module with temperature measurement, 7-temperature measuring hole, 8-center point temperature sensor, 9-surrounding temperature sensor, 10-data acquisition and recording device, 11-temperature difference analysis device, 12-temperature measurement fixing bracket, 13-center point temperature sensor socket, 14-surrounding temperature sensor socket, 15-data acquisition and recording device connection port, 16-temperature difference analysis device connection port, 17-energy consumption test equipment, 18-quality measurement device, 19-control module. DETAILED DESCRIPTION

[0032] The present invention is further described in detail with reference to the following specific embodiments 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 the present invention has no special restrictions.

[0033] The utility model provides a dry thermostat energy efficiency test device, the test device comprises an isothermal heat absorption module 1, a temperature measuring device 2, an energy consumption measuring device 3, and a standard thermostat 4; the temperature measuring device 2 is connected to the energy consumption measuring device 3 by a connecting line, the isothermal heat absorption module 1 is matched with the temperature measuring device 2, and the temperature measuring device 2 has a temperature measuring thermal resistor, which can be matched and inserted into the isothermal heat absorption module with temperature measurement of the isothermal heat absorption module 1.

[0034] The isothermal heat absorption module 1 includes a common isothermal heat absorption module 5 and / or an isothermal heat absorption module with temperature measurement 6; the isothermal heat absorption module with temperature measurement 6 is provided with a temperature measuring hole 7, and the temperature measuring hole 7 extends from the surface of the isothermal heat absorption module with temperature measurement 6 to the center position for fixing the temperature measuring sensor.

[0035] The common isothermal heat absorption module 5 and the isothermal heat absorption module with temperature measurement 6 are both composed of an outer shell and an inner filling. The outer shell and the inner filling are made of the same or different materials, and the materials have a measurable and quantifiable specific heat capacity. The common isothermal heat absorption module 5 and the isothermal heat absorption module with temperature measurement 6 have the same specific heat capacity.

[0036] The temperature measuring device 2 includes a central point temperature sensor 8, surrounding temperature sensors 9, a data acquisition and recording device 10, a temperature difference analysis device 11, and a temperature measurement fixing bracket 12;

[0037] The data acquisition and recording device 10 is connected to the isothermal heat absorption module 6 with temperature measurement arranged at the central position through the central point temperature sensor 8, and the temperature difference analysis device 11 is connected to the isothermal heat absorption module 6 with temperature measurement arranged at the surrounding positions through the surrounding temperature sensors 9.

[0038] The central point temperature sensor 8 and the surrounding temperature sensors 9 are both thermal resistors including platinum thermal resistors and copper thermal resistors;

[0039] The data acquisition and recording device 10 supports a multi-channel synchronous data real-time acquisition mode, and can synchronously acquire the temperature data of the center point measured by one or more center point temperature measurement sensors to calculate the average temperature value of the center point of the constant temperature metal bath;

[0040] The temperature difference analysis device 11 adopts the principle of a bridge circuit and determines the uniformity of the temperature of the surrounding temperature sensors 9 by testing the bridge current formed by the surrounding temperature sensors 9 .

[0041] The temperature measurement fixing bracket 12 is provided with a central point temperature measurement sensor socket 13, a surrounding temperature measurement sensor socket 14, a data acquisition and recording device connection port 15, and a temperature difference analysis device connection port 16;

[0042] The temperature measuring fixed bracket 12 is made of alloy material and is used to fix the central point temperature sensor 8 and the surrounding temperature sensors 9; the temperature measuring fixed bracket 12 can switch the connection between the surrounding temperature sensors 9 and the data acquisition and recording device 10 or the temperature difference analysis device 11 through circuit switching.

[0043] The energy consumption measuring device 3 comprises an energy consumption test device 17, a quality measuring device 18, and a control module 19; the control module 19 is connected to the energy consumption test device 17 and / or the quality measuring device 18 through a physical or virtual connection;

[0044] The control module 19 is also connected to the data acquisition and recording device 10 and / or the temperature difference analysis device 11 in the temperature measurement device 2 to control the data acquisition and recording device 10 and the temperature difference analysis device 11 .

[0045] The standard thermostat 4 uses an air bath or a liquid bath, with a temperature fluctuation requirement of ≤0.05°C and a temperature uniformity requirement of ≤0.10°C, and is used to maintain a constant starting temperature of the isothermal heat absorption module 1 to ensure that the heat absorbed by the isothermal heat absorption module 1 can be quantified during each energy consumption measurement.

[0046] The utility model also provides a dry thermostat energy efficiency test method implemented by the above test device, the test method comprising the following steps:

[0047] Step 1: Place the isothermal heat absorption module and the temperature sensor in a standard thermostat to maintain the same temperature;

[0048] Step 2: Connect the test device as required, insert the temperature sensor into the center of the isothermal heat absorption module with temperature measurement and fix it;

[0049] Step 3: Place the common isothermal endothermic modules and the isothermal endothermic modules with temperature measurement into the heating holes of the constant temperature metal bath to be measured. The number of isothermal endothermic modules with temperature measurement is n, and the mass of each isothermal endothermic module with temperature measurement is m0. The total mass of the filled common isothermal endothermic modules is m1, and the total mass of the isothermal endothermic modules is M=m1+nm0;

[0050] Step 4: Determine the heating energy consumption of the constant temperature metal bath under test: the isothermal heating module is preheated to a constant temperature of t0, and the constant temperature metal bath heating temperature is set to t s , the power is 100%, the constant temperature metal bath starts to heat, and the energy consumption test equipment starts to record the process energy consumption; the data acquisition and recording device records the center point temperature of the isothermal heat absorption module with temperature measurement of each heating hole in real time (when the isothermal heat absorption module with temperature measurement is set to 1, the temperature is recorded as t1; when the isothermal heat absorption module with temperature measurement is two symmetrically centered, the temperatures recorded by the two heat absorption modules are t1 and t2 respectively, and the average temperature of the two isothermal heat absorption modules with temperature measurement needs to be taken later); the real-time average temperature is obtained. when When the temperature difference data t c ≤t cs When the energy consumption measurement equipment stops recording energy consumption, the energy consumption during the test is E1; then the heating energy efficiency is C1=E1 / [(t s -t0)·c·M];

[0051] like Figure 6 In the figure, the left figure only has the center point temperature t1 (the temperature of point 8), while the middle and right figures have center point temperatures t1 and t2 (also the temperatures of point 8, there are two). When the temperature measuring center hole cannot be determined as a single hole, the average temperature of the two symmetrical temperature measuring holes at the center position is needed to represent the center point temperature.

[0052] Step 5: Determine the constant temperature energy consumption of the constant temperature metal bath under test: The constant temperature of the constant temperature metal bath is the set temperature Θ s After stabilization for 1 hour, the energy consumption test equipment starts to record the process energy consumption and time when the constant temperature metal bath heater is disconnected from the power supply; the data acquisition and recording device records the center point temperature Θ1, Θ2, ..., Θ of the isothermal endothermic module with temperature measurement of each heating hole in real time. n ; Get the real-time average temperature when When, or the temperature difference analysis device temperature difference data Θ c >Θcs When the temperature controller is disconnected from the power supply for the first time after 24 hours of measurement, the energy consumption measurement equipment stops recording the energy consumption. The energy consumption during the test is E2 and the time is T2. Unit: J / kg;

[0053] Step 6: The calculated heating energy efficiency C1 and constant temperature energy efficiency C2 are subsequently used for energy efficiency classification in the heating and constant temperature stages.

[0054] Example

[0055] For a 20-hole (4*5-hole) machine, Figure 6 As shown in the middle figure, the energy efficiency test is carried out in a constant temperature metal bath with a rated maximum temperature of 100°C. The entire process is carried out in an environment with an ambient temperature of 20°C ± 1°C and an ambient humidity of 50% RH ± 3% RH. The specific method is as follows:

[0056] Step 1: Place the isothermal heat absorption module and the temperature sensor in a standard thermostat. The set temperature of the standard thermostat is 20.00℃. The digital display resolution of the standard thermostat is 0.01℃, the temperature uniformity is <0.05℃, and the temperature fluctuation is <0.01℃, ensuring accurate and stable temperature control. The isothermal heat absorption module uses a copper alloy with a relatively stable specific heat capacity at 0-150℃ as the material of the isothermal heat absorption module. Its specific heat capacity at 0-150℃ is c=0.390×10^3J / (kg·℃), and the isothermal process is not less than 2 hours.

[0057] Step 2: Connect the test device as required, insert the temperature sensor into the center of the isothermal heat absorption module with temperature measurement and fix it;

[0058] Step 3: Place the common isothermal endothermic modules and the isothermal endothermic modules with temperature measurement into the heating holes of the constant temperature metal bath to be tested. The number of isothermal endothermic modules with temperature measurement is 6, and the mass of each isothermal endothermic module with temperature measurement is 60g. The total mass of the filled common isothermal endothermic modules is 940g, and the total mass of the isothermal endothermic modules is M=1kg.

[0059] Step 4: Determine the heating energy consumption of the isothermal metal bath under test: the isothermal heating module preheats to a constant temperature of t0 = 20.0 °C, and the constant temperature metal bath heating temperature is set to t s =100.0℃, power is 100%, preset temperature difference data threshold t cs =3.0℃. The constant temperature metal bath starts to heat up, and the energy consumption test equipment starts to record the process energy consumption; the data acquisition and recording device records the center point temperature t1, t2 of the isothermal heat absorption module with temperature measurement of each heating hole in real time; the real-time average temperature is obtained when When the temperature difference data t cWhen the temperature is ≤3.0℃, the energy consumption measuring equipment stops recording energy consumption. The energy consumption during the test is E1=6.0*10^5J; the heating energy efficiency is C1=E1 / [(t s -t0)·c·M]=19.23;

[0060] Step 5: Determine the constant temperature energy consumption of the constant temperature metal bath under test: The constant temperature of the constant temperature metal bath is set to 100.0°C, and the constant temperature state temperature difference data threshold Θ is preset cs =3.0℃, after stabilization for 1h, the energy consumption test equipment starts to record the process energy consumption and time when the constant temperature metal bath heater is disconnected from the power supply; the data acquisition and recording device records the center point temperature Θ1, Θ2, ..., Θ n ; Get the real-time average temperature when When, or the temperature difference analysis device temperature difference data Θ c >Θ cs When the temperature controller is disconnected from the power supply for the first time after 24 hours of measurement, the energy consumption measurement equipment stops recording the energy consumption. The energy consumption during the test is E2 = 4.32*10^7J, and the time is T2 = 24 hours, 1 minute and 30 seconds = 24.025h; constant temperature energy efficiency

[0061] Step 6: Based on the obtained heating energy efficiency C1 and constant temperature energy efficiency C2, the heating energy consumption classification and constant temperature energy consumption classification of the constant temperature metal bath can be obtained according to relevant standards.

[0062] By comparing the total energy consumption parameters of similar constant temperature metal baths, we can provide technical support for the future energy consumption classification of constant temperature metal baths and establish unified, scientific and effective technical support for the energy efficiency classification of constant temperature metal baths, which will further promote the development and progress of industry technology and contribute to the creation of green laboratories.

[0063] 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 dry thermostat temperature difference analysis and energy efficiency testing device, characterized in that: The testing device comprises an isothermal heat absorption module (1), a temperature measuring device (2), an energy consumption measuring device (3), and a standard thermostat (4); the temperature measuring device (2) is connected to the energy consumption measuring device (3), and the isothermal heat absorption module (1) is connected to the temperature measuring device (2); wherein, The isothermal heat absorption module (1) is an isothermal heat absorption module (6) with temperature measurement; the isothermal heat absorption module (6) with temperature measurement is provided with a temperature measurement hole (7), and the temperature measurement hole (7) extends from the surface of the isothermal heat absorption module (6) with temperature measurement to the center position, and is used to fix a temperature measurement sensor; The number of the isothermal heat absorbing modules (6) with temperature measurement is 5 to 6, one of which is arranged at the central test hole position of the constant temperature metal bath to be measured, and the remaining ones are evenly and symmetrically arranged at the test holes around the constant temperature metal bath. If the central point of the constant temperature metal bath to be measured cannot be determined, two isothermal heat absorbing modules (6) with temperature measurement are arranged in the symmetrical holes at the central point; The temperature measuring device (2) comprises: a central point temperature sensor (8), surrounding temperature sensors (9), a temperature difference analysis device (11), and a temperature measurement fixed bracket (12); the temperature difference analysis device (11) is connected to the isothermal heat absorption module (6) with temperature measurement arranged at the surrounding positions through the surrounding temperature sensors (9); the central point temperature sensor (8) is fixedly connected to the central position of the isothermal heat absorption module (6) with temperature measurement through the temperature measurement hole (7) of the isothermal heat absorption module (6); the number of temperature sensors including the central point temperature sensor (8) and the surrounding temperature sensors (9) is the same as the number of the isothermal heat absorption modules (6) with temperature measurement; The energy consumption measuring device (3) comprises: an energy consumption testing device (17), a mass measuring device (18), and a control module (19); the control module (19) is connected to the energy consumption testing device (17) and / or the mass measuring device (18); the control module (19) and the temperature difference analysis device (11) in the temperature measuring device (2) are connected by wires for controlling the temperature difference analysis device (11).

2. The dry thermostat temperature difference analysis and energy efficiency testing device according to claim 1, characterized in that: The isothermal heat absorption modules (6) with temperature measurement are all made of materials with stable thermal conductivity and good thermal conductivity, including: standard copper, standard platinum, oil, and ethanol.

3. The dry thermostat temperature difference analysis and energy efficiency testing device according to claim 1, characterized in that: The isothermal heat absorption module (6) with temperature measurement is of regular shape, including: circular or square.

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