13 results about "Cold test" patented technology

The invention belongs to the technical field of testing equipment, and particularly relates to a high-vacuum low-temperature testing cabin which can meet the requirement for simultaneous and independent testing of a plurality of different samples through a testing mechanism which is independently arranged and can flexibly adjust the position, improve the testing efficiency and meet the debugging requirements of more testing environments. Compared with a conventional single space, the flexibility is higher; the independent double-sided space of the test chamber can further realize large-temperature-difference hedging test or conventional low-temperature test or high-temperature test according to test environment requirements, additional transfer space is not needed, hedging detection of multiple environment temperatures can be carried out at the same time, and detection conditions are more diversified.

The utility model relates to the technical field of heat exchanger testing, and particularly discloses a low-temperature cold test heat exchange comprehensive testing system which comprises a water supply system connected with a heat exchanger and forming a circulating pipeline, a medium conveying system connected with a heat exchange pipeline inlet of the heat exchanger, and a gas output tube pass connected with a heat exchange pipeline outlet of the heat exchange pipeline. The medium conveying system comprises a liquid supply pipeline, a liquid conveying pipeline connected with an outlet of the liquid supply pipeline and an inlet of the heat exchange pipeline, a conversion pipeline connected with the outlet of the liquid supply pipeline and the inlet of the heat exchange pipeline, and a liquid stop valve arranged on the liquid conveying pipeline. According to the utility model, the performance of the heat exchanger can be effectively tested in a gas-phase medium or a liquid-phase medium, and the test precision of the heat exchanger is higher.

The invention discloses a method and a device for detecting heat transfer capacity by using a temperature measuring element, and belongs to the technical field of low-temperature heat transfer test.The method comprises the following steps: detecting steady-state temperature distribution in a to-be-detected state by using the temperature measuring element for a to-be-detected object; a cold source and a controllable heating element are utilized to act on the two ends of an object to be detected respectively, so that the steady-state temperature distribution of the object to be detected is consistent with the steady-state temperature distribution in a to-be-detected state, and the input power of the controllable heating element at the moment is read, namely the steady-state heat transfer amount of the object to be detected in the to-be-detected state. The use of dangerous media such as liquid hydrogen or liquid oxygen can be avoided, and the safety risk of low-temperature testing is solved; the heat transfer amount is directly obtained through an isothermal compensation mechanism, and the error of a heat transfer amount result fitted through temperature difference is eliminated; and multi-temperature-zone test can be realized, and full-temperature-zone measurement at low temperature is supported. The device can be widely applied to accurate testing of thermal performance of low-temperature systems in the fields of superconduction, spaceflight and the like.

The utility model provides a high and low temperature probe station testing device comprising a probe station body which is provided with a chuck and a probe card; the temperature measuring unit comprises a temperature measuring cover body and a temperature sensor, and the temperature measuring cover body covers the concave cavity of the chuck; a probe of the temperature sensor penetrates through the first through hole in the temperature measurement cover body and enters the concave cavity for temperature measurement; the upper cover is provided with a concave space, a light source is arranged in the middle area of the concave space, and a first sealing ring is arranged around the circumferential annular area of the light source. Blowing air into a closed space enclosed by the upper cover and the probe card through a second through hole in the upper cover; and the air blocking sheet is arranged near the air outlet of the fan of the probe station. The temperature measuring unit improves the temperature uniformity and stability of high and low temperature testing of the wafer, and solves the problem of frosting of the chuck. The blowing and sealing design of the upper cover solves the problem of frosting of the probe card and the wafer during low-temperature testing. And the wind shield sheet solves the problem of non-uniformity of the temperature of the wafer during high-temperature testing.

The utility model discloses a three-box impact type cold and hot water test box which comprises a main box body, a low-temperature test box is arranged on one side in the main box body, a normal-temperature test box is arranged on one side of the low-temperature test box, and a high-temperature test box is arranged on one side of the normal-temperature test box. Shower heads are fixedly installed in the low-temperature test box, the normal-temperature test box and the high-temperature test box, a cold water tank is arranged below the low-temperature test box, a hot water tank is arranged below the high-temperature test box, and water injection pipes are fixedly installed on the back faces of the cold water tank and the hot water tank. And a first multi-stage pump, a second multi-stage pump and a third multi-stage pump are respectively and fixedly arranged on the back surfaces of the cold water tank and the hot water tank. Through the combined action of the three test chambers, the actual material performance of a detected product in low-temperature, normal-temperature and high-temperature environments can be tested; the device has low-temperature, normal-temperature and high-temperature three-box detection type water impact test effects, and the detection work of a detected product can be more comprehensive.

The utility model discloses a kind of low temperature resistant water reducing agent testing devices, it is related to water reducing agent testing technical field, including low temperature test box body, the low temperature test box body top movable installation has lid, the low temperature test box body inside is provided with turbulence mould component;The technical scheme provided in the utility model, by setting turbulence mould component, specifically, when low temperature resistant water reducing agent is tested in low temperature test box body, drive motor drives support disc, and drives fixed disc rotation, fixed disc drives turbulence blade rotation, so that the air in low temperature test box body continuously flows, so that the air distribution in low temperature test box body is more uniform, prevent temperature distribution unevenly influence test result.

The utility model relates to the technical field of low-temperature testing devices, and discloses BMS low-temperature function testing equipment which comprises a shell, a temperature changing piece and a temperature control assembly. The size of the shell is smaller than 150 cm < 3 >, a through hole is formed in the shell, the temperature changing piece is arranged in the shell, a temperature conduction containing part used for containing a BMS is arranged on the temperature changing piece, at least part of the temperature conduction containing part protrudes out of the through hole, and the temperature control assembly is connected with the shell and electrically connected with the temperature changing piece so that the temperature conduction containing part can be adjusted to reach the temperature needed by the BMS low-temperature test. According to the BMS low-temperature function testing equipment, the BMS can be subjected to low-temperature testing, compared with existing BMS low-temperature testing equipment, the overall size of the BMS low-temperature function testing equipment is smaller, the BMS low-temperature function testing equipment can be moved by moving the shell when a user needs to go out, carrying is more convenient, the BMS low-temperature function testing equipment can be used indoors or outdoors, application scenes are wider, and the BMS low-temperature function testing equipment is suitable for popularization and application. And the tool can be carried and used at any time as a portable tool, so that the practicability is better.

The utility model relates to the technical field of adsorption instruments, particularly provides a temperature control device and an adsorption instrument, and aims to solve the problem that the conventional adsorption instrument can only test at a single temperature. In order to achieve the purpose, according to the temperature control device, a refrigerant is contained in a first Dewar flask, a heat conduction block is arranged in a second Dewar flask stretching into the first Dewar flask, and the heat conduction block is provided with a containing groove for containing a sample tube and integrates a heating piece and a refrigerating piece; wherein the refrigerating part allows a refrigerant of the first Dewar flask to flow in, so that the refrigerating part can cooperate with the heating part to adjust the temperature of the heat conduction block, thereby greatly expanding the test temperature zone, realizing the test of a sample at different temperatures, breaking through the limitation that a traditional adsorption instrument can only test at a single fixed low temperature, and obviously widening the temperature application range; and the test requirement of the sample under the variable temperature condition is met. In addition, the refrigerant is contained in the space formed by the first Dewar flask and the second Dewar flask, the heat preservation effect of the refrigerant can be improved, and loss is reduced.

The invention relates to the technical field of adsorption instruments, particularly provides a temperature control device and an adsorption instrument, and aims to solve the problem that an existing adsorption instrument can only test at a single temperature. In order to achieve the purpose, according to the temperature control device, a refrigerant is contained in a first Dewar flask, a heat conduction block is arranged in a second Dewar flask stretching into the first Dewar flask, and the heat conduction block is provided with a containing groove for containing a sample tube and integrates a heating piece and a refrigerating piece; wherein the refrigerating part allows a refrigerant of the first Dewar flask to flow in, so that the refrigerating part can cooperate with the heating part to adjust the temperature of the heat conduction block, thereby greatly expanding the test temperature zone, realizing the test of a sample at different temperatures, breaking through the limitation that a traditional adsorption instrument can only test at a single fixed low temperature, and obviously widening the temperature application range; and the test requirement of the sample under the variable temperature condition is met. In addition, the refrigerant is contained in the space formed by the first Dewar flask and the second Dewar flask, the heat preservation effect of the refrigerant can be improved, and loss is reduced.

The utility model relates to the field of test boxes, and discloses a high and low temperature and hot and cold shock test box, which comprises an outer box body provided with a first sub-bin and a second sub-bin which are communicated through a communication port; the movable bin is movably arranged in the outer box body and is used for bearing a tested sample; the driving mechanism is arranged on the outer box body and is in driving connection with the moving bin so as to drive the moving bin to penetrate through the communicating opening to reciprocate between the first sub-bin and the second sub-bin; the first temperature control mechanism regulates and controls the temperature of the first sub-bin; the second temperature control mechanism regulates and controls the temperature of the second sub-bin; the controller is in electric control connection with the first temperature control mechanism, the second temperature control mechanism and the driving mechanism; the controller comprises a cold and hot impact key and a high and low temperature key, the cold and hot impact key controls the movable bin to be switched between the first sub-bin and the second sub-bin for a cold and hot impact test, and the high and low temperature key locks the movable bin in the first sub-bin for a high and low temperature test. The device is high in structural integration level, and can be used for single test or combined test of high and low temperature test and cold and hot impact test.

The invention relates to the technical field of high and low temperature testing machines, and discloses a high and low temperature testing machine temperature control system heated by a pipeline type electric heating pipe, which comprises a testing cabin, a temperature control module, a heating module and a refrigeration module, the refrigeration module adopts a double-compressor cascade refrigeration module, the temperature control module adopts a fuzzy self-adaptive PID control module, and the heating module adopts a pipeline type electric heating pipe. And a temperature adjusting mechanism is also arranged in the test cabin. Through the fuzzy self-adaptive PID control technology, the fuzzy set theory and traditional PID are combined, the intelligence and precision of temperature control are greatly improved, the temperature control system error and the error change rate are fuzzified, the parameters Kp, Ki and Kd are set according to the fuzzy rule, the system can automatically adjust the control strategy according to the change of the external environment, and the temperature control accuracy is improved. The adaptive capacity to complex working conditions is enhanced, the temperature control mode of cold and hot confrontation enables temperature adjustment to be finer, the temperature control precision is guaranteed, and a stable and reliable temperature environment is provided for testing.

The application discloses an LED driving power supply testing machine and a testing method, wherein the LED driving power supply testing machine comprises a testing machine box, a high-low temperature testing mechanism, a storage type ventilation mechanism and a dust filtering and energy storing mechanism. The high-low temperature testing mechanism comprises a heat preservation box body, a ventilation inner box body is fixedly arranged in the heat preservation box body, a temperature sensor is fixedly arranged in the ventilation inner box body, a heating control assembly is fixedly arranged above the heat preservation box body, and a cooling control assembly is fixedly arranged below the heat preservation box body. The storage type ventilation mechanism comprises a pair of hot air storage tanks and a pair of cold air storage tanks. According to different testing states, the storage type ventilation mechanism can be used for storing and circulating hot air and cold air in a testing space, so that the operation energy consumption in the high-low temperature testing process of the LED driving power supply is reduced, and the temperature regulation efficiency and energy saving and environmental protection performance of the high-low temperature testing equipment of the LED driving power supply are remarkably improved.

The utility model discloses a device for testing the defocusing amount of a camera in a high and low temperature environment, comprising a test box, one side of the test box is hinged with two groups of box doors through hinges, when the camera is subjected to a defocusing amount test in a high temperature environment, heating is started through a heating device, so that heat enters the test box through a communication net groove, and the test box is connected with the test box. The temperature sensor monitors the temperature in the test box, so that the temperature in the test box reaches a proper temperature, the test mechanism and the to-be-tested camera are matched to carry out a test in a high-temperature environment, the control panel displays and controls data during the test, and in a similar way, during a low-temperature test, the refrigeration device starts refrigeration, so that the temperature in the test box is reduced. Refrigerated air enters the test box through the communication net groove, the temperature in the test box is monitored through the temperature sensor, the test mechanism and the to-be-tested camera are matched for testing in a low-temperature environment, and the performance stability and adaptability of the camera under an extreme temperature condition can be detected to a certain extent.