Abstract

A structurally segmented VOC release chamber having an electronic cooling pad for temperature control, comprising at least two interconnected chamber segments (1). Chamber compartments are provided in the chamber segments (1). Externally connecting flanges (11) are fixedly provided at the end parts of the chamber segments (1). One externally connecting flange (11) and the other externally connecting flange (11) correspondingly connected thereto employ a mounting bolt to implement the connection. The mounting bolt comprises a first bolt (111) arranged below the externally connecting flanges. A through hole (2) used for mounting/unmounting the first bolt (111) is provided at the bottom of the chamber compartments. A sealing cover (3) used for sealing the through hole (2) is removably provided on the through hole (2). Obviated is the need to lift the release chamber to complete the mounting/unmounting of the connecting bolt below the connecting flanges, thus greatly saving input costs of an early-stage infrastructure for a large-sized release chamber.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

Disclosed is a three-box low-air-pressure cold and hot impact box, comprising a pressure-bearing box body (1). A high-temperature low-air-pressure test chamber (2), a low-temperature low-air-pressure test chamber (3) and a test chamber (4) are arranged inside the pressure-bearing box body (1); a high-temperature air circulation channel (201) is arranged between the high-temperature low-air-pressure test chamber (2) and the test chamber (4); a low-temperature air circulation channel (301) is arranged between the low-temperature low-air-pressure test chamber (3) and the test chamber (4); and a first low-air-pressure storage test pipeline (1001) and/or a second low-air-pressure storage test pipeline (1002) and/or a third low-air-pressure storage test pipeline (1003) and/or a first evacuation pipeline (2001) and/or a second evacuation pipeline (2002), which are connected to a vacuum pump (5), are arranged on the pressure-bearing box body (1). The impact box integrates cold and hot low-air-pressure impact test functions, enhances the practicability of the impact box, and realizes instantaneous pressure test environment switching, such that the working efficiency of the impact box is improved, same is very convenient, and is suitable for large-scale popularization and application.

IPC Classes  ?

• G01D 21/00 - Measuring or testing not otherwise provided for

Abstract

A two-box low-pressure cold and heat impact box, comprising a pressure-bearing box body (1). The pressure-bearing box body (1) is internally provided with a high-temperature low-pressure test chamber (2), a low-temperature low-pressure test chamber (3), and a basket (4). A high-temperature air circulation channel and a low-temperature air circulation channel are provided between the high-temperature low-pressure test chamber (2), the low-temperature low-pressure test chamber (3) and the pressure-bearing box body (1), respectively. The high-temperature air circulation channel and the low-temperature air circulation channel are in communication with the high-temperature low-pressure test chamber (2) and the low-temperature low-pressure test chamber (3), respectively. The pressure-bearing box body (1) is provided with a first low-pressure storage test pipeline (1001), a second low-pressure storage test pipeline (1002), a first vacuum pipeline (2001) and a second vacuum pipeline (2002) connected to a vacuum pump (23). The two-box low-pressure cold and heat impact box integrates cold and hot low-pressure impact tests, which reduces the pressure and temperature switching time, improves the working efficiency, and brings great convenience to users.

IPC Classes  ?

• G01N 3/60 - Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
• G01D 21/00 - Measuring or testing not otherwise provided for

Abstract

An evaporation closed chamber for detecting hazardous substance, having a closed chamber, an orifice plate, a pressure plate, a drive device and an elastic film, the orifice plate is mounted on any surface(s) of the closed chamber, the elastic film is arranged on the outer side of the orifice plate, the pressure plate is arranged on the outer side of the elastic film, and the drive device is in transmission connection with the pressure plate to drive the pressure plate to move forwards and backwards to press the elastic film against the orifice plate. The elastic film expands with the increase of internal temperature of the closed chamber and shrinks with the temperature decrease of the closed chamber such that the gas in the closed chamber can be timely compensated; the orifice plate prevents hazardous substance from leaving on the gas compensation device to influence test accuracy.

IPC Classes  ?

• G01N 1/22 - Devices for withdrawing samples in the gaseous state
• G01N 1/40 - Concentrating samples
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

The present disclosure discloses an electronic cooling anti-condensation system, and an anti-condensation method for the same. The system comprises a testing chamber, electronic cooling plates, temperature sensors, a temperature and humidity sensor, a cooling plate control unit, and a main controller. The main controller is electrically connected to the temperature sensors, the temperature and humidity sensor, and the cooling plate control unit. The main controller is capable of calculating a dew point value of the air in the testing chamber according to a temperature value and a humidity value of the interior the testing chamber acquired by the temperature and humidity sensor, and if the dew point value of the air is greater than a pre-determined threshold, the main controller controls the cooling plate control unit to reduce the number of operating electronic cooling plates or output powers of the electronic cooling plates, wherein the pre-determined threshold is a temperature T1° C. of the electronic cooing plate or a temperature T1+n° C. of the electronic cooling plate acquired by the temperature sensor, and n≤is less than or equal to 10. The present disclosure achieves real-time control of operation states of the electronic cooling plates, thereby realizing redundant control of the cooling plates, and preventing the cooling plates from causing condensation in the chamber body, so as to achieve continuous operation when a failure occurs.

IPC Classes  ?

• F25D 21/04 - Preventing the formation of frost or condensate
• G05D 27/02 - Simultaneous control of variables covered by two or more of main groups characterised by the use of electric means
• B01L 1/02 - Air-pressure chambersAir-locks therefor

Abstract

An accelerated evaporation chamber for VOCs, formaldehyde, free gaseous substances and/or hydrocarbons, comprising a pressure-bearing evaporation chamber (1), a fast air intake device (2) and/or a slow air intake device (3) and/or an air intake valve (9), a pressure sensor or pressure gauge (5) used for detecting pressure in the evaporation chamber (1), at least one set of vacuum devices (6) used for the vacuum pumping of the evaporation chamber (1), and at least one set of purifying and filtering devices used for the purification of an internal gas of the evaporation chamber (1). The pressure sensor or pressure gauge (5), the vacuum device (6), and the fast air intake device (2) and/or the slow air intake device (3) and/or the air intake valve (9) are separately connected to the evaporation chamber (1). The purifying and filtering devices are installed at an inner part of the evaporation chamber (1) and/or installed at an outer part of the evaporation chamber (1), and communicate with the inner part of the evaporation chamber (1).

IPC Classes  ?

• B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours

Abstract

An evaporation sealed chamber for detecting harmful substances, comprising a sealed chamber (1), a porous plate (6), a pressing plate (7), a driving device (8) and an elastic membrane (9); the porous plate (6) is installed on any one or more surfaces of the sealed chamber (1), the elastic membrane (9) is disposed on the outer side surface of the corresponding porous plate (6), the pressing plate (7) is disposed on the outer side surface of the corresponding elastic membrane (9), and the driving device (8) is in transmission connection with the corresponding pressing plate (7) so as to drive the pressing plate (7) to move forwards and backwards to press the elastic membrane (9) to be in contact with the porous plate (6). The evaporation sealed chamber is simple in structure; by means of providing an elastic membrane (9) that expands along with the increase of the temperature in the sealed chamber (1) and contracts along with the decrease of the temperature, the gas in the sealed chamber (1) can be compensated in a timely manner; and the porous plate (6) is provided to effectively prevent harmful substances from remaining on a gas compensation device (5) and affecting test accuracy; in addition, the effects of the external environment or other uncertain factors on the detection result are effectively avoided, and the detection precision is thus improved.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• B01L 1/00 - EnclosuresChambers

Abstract

A sealed chamber (1) that has an adjustable volume and a control method; the sealed chamber (1) and a gas compensation device (2) are comprised, the gas compensation device (2) being disposed at one or more surfaces of the sealed chamber (1), wherein the gas compensation device (2) comprises an orifice plate (3), a pressing plate (4), a driving device (5) and an elastic film (6); the orifice plate (3) is installed on any one or more surfaces of the sealed chamber (1); the elastic film (6) is disposed on an outer side surface of the corresponding orifice plate (3) and may expand or contract relative to an inner part of the sealed chamber (1); the pressing plate (4) is disposed on an outer side surface of the corresponding elastic film (6); and the driving device (5) is in drive connection with the corresponding pressing plate (4) to drive the front and back movement of the pressing plate (4), thereby pressing the elastic film (6) to come into contact with the orifice plate (3). By means of the arrangement of the elastic film (6), when the temperature at the inner part of the sealed chamber (1) rises, the elastic film (6) expands, and when the temperature at the inner part of the sealed chamber (1) decreases, the elastic film (6) contracts, thereby changing the volume of the inner part of the sealed chamber (1) so that the internal volume of the sealed chamber (1) changes along with a change in the test temperature, effectively improving detection accuracy.

IPC Classes  ?

• G05D 27/02 - Simultaneous control of variables covered by two or more of main groups characterised by the use of electric means

Abstract

A simple chamber for a formaldehyde or VOC release test and pretreatment, comprising a chamber (1) provided with a chamber door (2), an air inlet (3), and an exhaust port (4). At least one semiconductor refrigeration sheet (5) capable of cooling and/or heating or a liquid temperature regulating jacket (16) is mounted on the outer wall of the chamber (1), and a stirring fan (6) is mounted inside the chamber (1). A heat conduction zone in the semiconductor refrigeration sheet (5) or a temperature sensor (7) for temperature measurement of the liquid temperature regulating jacket (16) is mounted on the outer wall of the chamber (1). A temperature and humidity sensor (17) is installed inside the chamber (1), and a filtering duct (8) communicating with the interior of the chamber (1) is connected to the exterior of the chamber (1). An intake switch valve (9), an outlet switch valve (10), a filter device, and a filtering fan (11) are mounted on the filtering duct (8). The present invention has a simple structure and low costs, and can provide a constant temperature and/or constant humidity clean chamber (1) with a controllable temperature, relative humidity, and background concentration, thereby providing a stable standard test environment for testing, and avoiding the impact of environmental factors or other uncertainties on test results.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• B01L 1/00 - EnclosuresChambers

Abstract

The present invention discloses an electronic cooling anti-condensation system, and an anti-condensation method for the same. The system comprises a testing chamber, electronic cooling plates, temperature sensors, a temperature and humidity sensor, a cooling plate control unit, and a main controller. The main controller is electrically connected to the temperature sensors, the temperature and humidity sensor, and the cooling plate control unit. The main controller is capable of calculating a dew point value of the air in the testing chamber according to an internal temperature value and a humidity value of the testing chamber acquired by the temperature and humidity sensor. If the dew point value of the air is greater than a pre-determined threshold, the cooling plate control unit is controlled to reduce the number of operating electronic cooling plates or an output power of the electronic cooling plates, wherein the pre-determined threshold is a temperature T1 of the electronic cooling plates acquired by the temperature sensors or a temperature of the electronic cooling plates T1 + n°C, where n ≤ 10. The invention achieves real-time control of operation states of the electronic cooling plates, thereby realizing redundant control of the cooling plates, and preventing the cooling plates from causing condensation in the chamber body, so as to achieve continuous operation when a failure occurs.

IPC Classes  ?

• G05D 27/02 - Simultaneous control of variables covered by two or more of main groups characterised by the use of electric means

Abstract

A harmful substance testing device having an internal air circulation device, comprising a cabinet member (1) provided with an internal air circulation device (11) for simulating internal air circulation. The internal air circulation device can simulate an internal gas circulation system of transportation vehicles or indoor spaces, so as to avoid the interfering effects of environmental factors on a testing structure, thereby improving testing accuracy. The testing device can be further provided with a fragrance feeder for fragrance testing, and for testing human perception of an environment after a fragrance has been introduced into a transportation vehicle or an indoor space, such that the testing device has diversified functions. The testing device achieves gas sampling when ventilation or internal circulation is turned on or turned off, detection of the amount of a harmful volatile organic compound (VOC), such as formaldehyde, released from an object undergoing testing, and simulation of human perception of an environment after a fragrance has been introduced into a transportation vehicle or an indoor space. The invention simulates diverse environments, and has highly controlled simulation factors, so as to prevent environmental factors or uncertain factors from interfering with a testing result, ensuring that testing is highly accurate.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

Disclosed is a method for treating the surface of a releasing chamber in contact with a test object. The method comprises the following steps: (1) with regard to components made by processing stainless steel or glass, if the component is stainless steel, the stainless steel component is oxidized with an acid and then washed with an organic solvent and water, or electrolyzed after oxidation and then washed with an organic solvent and water; if the component is glass, the glass component is corroded by HCL or HF, or the surface thereof is roughened by a physical method; (2) then follows production of a deactivated layer by processing the surface of the component washed in step (1), or first production of an intermediate layer by processing the surface of the component washed in step (1), and then production of a deactivated layer by processing the surface of the intermediate layer. The method reduces the adsorption capacity of the contact surface, greatly reduces the adsorption of a test object on the inner wall of the chamber and on the surface in contact with the test object of each component, so that the tested value of the samples taken from a sampling tube is closer to the actual value of the test object in the chamber, effectively improving the testing precision of the releasing chamber.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

A low pressure and high-low temperature test box capable of controlling humidity comprises a test box body (1), a first heater (2) and a first evaporator (3) which are installed in the test box body (1), a humiture sensor (4) for detecting the humiture inside the test box body (1) and a vacuum manometer (5) for detecting the pressure inside the test box body (1) which are both installed on the test box body (1), an air circulation device (6) for circulating the air inside the test box body (1), and a humidity adjusting device (7) which is connected to the test box body (1) and used for adjusting the humidity inside the test box body (1). A vacuum pump (8) for vacuumizing the test box body (1) is also provided on the test box body (1).

IPC Classes  ?

• G05D 22/02 - Control of humidity characterised by the use of electric means
• B01L 1/00 - EnclosuresChambers
• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G05D 16/14 - Control of fluid pressure with auxiliary non-electric power

Abstract

Detection system and humidity detection method for detecting volatile organic compound comprises a device for introducing clean air and a controller, wherein the device for introducing clean air is connected with a test chamber; a test chamber sheath is sleeved outside the test chamber; the test chamber is provided with a temperature sensor for detecting the temperature in the test chamber, a high-temperature test exhaust device is connected with a high-temperature exhaust pipeline of the test chamber, and a low-temperature test exhaust device is connected with a low-temperature exhaust pipeline of the test chamber; a pipeline connecting the test chamber with the low-temperature test exhaust device is also provided with a dew point sensor for detecting dew point of the air in the low-temperature exhaust pipeline; and the temperature sensor and the dew point sensor are connected with the controller.

IPC Classes  ?

• G01N 25/66 - Investigating or analysing materials by the use of thermal means by investigating moisture content by investigating dew-point
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

A low pressure and high-low temperature test box capable of controlling humidity comprises a test box body (1), a first heater (2) and a first evaporator (3) which are installed in the test box body (1), a humiture sensor (4) for detecting the humiture inside the test box body (1) and a vacuum manometer (5) for detecting the pressure inside the test box body (1) which are both installed on the test box body (1), an air circulation device (6) for circulating the air inside the test box body (1), and a humidity adjusting device (7) which is connected to the test box body (1) and used for adjusting the humidity inside the test box body (1). A vacuum pump (8) for vacuumizing the test box body (1) is also provided on the test box body (1).

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• B01L 1/00 - EnclosuresChambers

Abstract

A detection system and a humidity detection method for detecting a volatile organic compound are provided. The detection system comprises a device for introducing clean air and a controller, wherein the device for introducing clean air is connected with a test chamber; a test chamber sheath is sleeved outside the test chamber; the test chamber is provided with a temperature sensor for detecting the temperature in the test chamber, a high-temperature test exhaust device connected with a high-temperature exhaust pipeline of the test chamber, and a low-temperature test exhaust device connected with a low-temperature exhaust pipeline of the test chamber; a pipeline connecting the test chamber with the low-temperature test exhaust device is also provided with a dew point sensor for detecting dew point of the air in the low-temperature exhaust pipeline; and the temperature sensor and the dew point sensor are connected with the controller. The technical problem that the humidity sensor of the conventional detection system is easy to damage during high-temperature detection is effectively solved; and the detection system can perform low-temperature detection and high-temperature detection, has low maintenance cost and is convenient to use.

IPC Classes  ?

• G01N 1/22 - Devices for withdrawing samples in the gaseous state
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups