5 results about "Cold test" patented technology

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 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 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 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.