An accelerated evaporation chamber for VOC, formaldehyde, free gases and / or hydrocarbons

Abstract

The present invention discloses a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, comprising a pressure-bearing evaporation chamber, a fast air intake device and / or a slow air intake device and / or an air intake valve, a pressure sensor or a pressure gauge for detecting the pressure in the evaporation chamber, at least one set of vacuum devices for evaporating the evaporation chamber, and at least one set of purification and filtering devices for purifying the gas inside the evaporation chamber, the pressure sensor or the pressure gauge, the vacuum device, and the fast air intake device and / or the slow air intake device and / or the air intake valve are respectively connected to the evaporation chamber, and the purification and filtering device is installed inside the evaporation chamber and / or installed outside the evaporation chamber and communicated with the inside of the evaporation chamber. The present invention can ensure that the gas extracted by the vacuum device is relatively clean, prevent the pollutants generated by the sample from filling the inside of the evaporation chamber, and prevent the pollutants that have been extracted from the evaporation chamber from returning to the product when the pressure in the evaporation chamber is restored.

Description

Technical Field

[0001] The present invention relates to the technical field of pollutant treatment equipment, and more specifically, to an accelerated evaporation chamber for VOC, formaldehyde, extractable free gaseous substances and / or hydrocarbons (HC). Background Art

[0002] As people's living standards continue to improve, people's requirements for product quality have also greatly increased, especially the VOC, formaldehyde, hydrocarbons (HC), and harmful gas indicators in products must be limited to a reasonable range to protect the human body from toxic and harmful substances such as formaldehyde. For example, plastic parts, textiles and other products contain toxic substances such as VOC, formaldehyde, free gaseous substances, hydrocarbons (HC), etc. In order to protect people's health, it is necessary to treat the VOC, formaldehyde, free gaseous substances, and hydrocarbons (HC) contained in plastic parts, textiles, furniture, decorative materials and other non-metallic parts, so as to obtain qualified products. However, the existing pollutant treatment equipment has poor effect in the process of extracting pollutants with a vacuum pump, and the pollutants extracted by vacuum will fill the evaporation chamber. When the pressure in the evaporation chamber is restored, the extracted pollutants will return to the product. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned defects in the prior art and to provide a VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber.

[0004] To achieve the above-mentioned objectives, the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, comprising a pressure-bearing evaporation chamber, a fast air intake device and / or a slow air intake device and / or an air intake valve, a pressure sensor or a pressure gauge for detecting the pressure in the evaporation chamber, at least one group of vacuum devices for evacuating the evaporation chamber, and at least one group of purification and filtering devices for purifying the gas inside the evaporation chamber, wherein the pressure sensor or the pressure gauge, the vacuum device, and the fast air intake device and / or the slow air intake device and / or the air intake valve are respectively connected to the evaporation chamber, and the purification and filtering device is installed inside the evaporation chamber and / or installed outside the evaporation chamber and is communicated with the inside of the evaporation chamber.

[0005] Preferably, the purification and filtering device includes an internal filtering module and a fan or an air pump, wherein the internal filtering module and the fan or the air pump are both located outside the evaporation chamber and connected to the interior of the evaporation chamber through an external circulation pipe, and both ends of the external circulation pipe are connected to the interior of the evaporation chamber.

[0006] Preferably, the purification and filtering device includes an internal filtering module and a fan or an air pump, wherein the internal filtering module and the fan or the air pump are both located inside the evaporation chamber, the internal filtering module is installed on an internal pipe connected to the fan or the air pump, or the internal filtering module is installed on one or more inner walls of the evaporation chamber.

[0007] Preferably, the purification and filtering device includes an internal filtering module and a fan or an air pump, the internal filtering module is located inside the evaporation chamber and / or is installed on one or more inner walls of the evaporation chamber, the fan or the air pump is located outside the evaporation chamber, the fan or the air pump is connected to the interior of the evaporation chamber through an external circulation pipe, and both ends of the external circulation pipe are connected to the interior of the evaporation chamber.

[0008] Preferably, the internal filter module is configured as a formaldehyde and / or VOC and / or HC and / or dust filter.

[0009] Preferably, the external circulation pipeline is a pressure-bearing pipeline, and pipeline valves are installed at the inlet and / or outlet of the external circulation pipeline connected to the evaporation chamber.

[0010] Preferably, the vacuum device includes a check valve and a vacuum pump or a frequency-controlled vacuum pump, the check valve and the vacuum pump are connected to the exhaust pipeline of the evaporation chamber, the check valve is located at the air inlet end of the vacuum pump or at the air outlet end of the vacuum pump, and the vacuum pump and the pressure sensor are electrically connected to the controller.

[0011] Preferably, the exhaust pipe of the evaporation chamber is also equipped with a VOC, formaldehyde and HC recovery device located at the outlet end of the vacuum device and / or a purification device for purifying the gas exhausted from the evaporation chamber. The VOC, formaldehyde and HC recovery device includes a box body and a refrigeration device installed in the box body. The refrigeration device is mainly composed of a compressor, a condenser and an evaporator installed in the VOC, formaldehyde and HC recovery device. A drain control valve for controlling the recovery liquid is installed at the bottom of the box body. The purification device is activated carbon, an oxidant for removing formaldehyde or a water tank.

[0012] Preferably, the rapid air intake device is composed of a rapid air intake pipeline and a first vacuum valve connected to the rapid air intake pipeline, one end of the rapid air intake pipeline is connected to the evaporation chamber, and the first vacuum valve is controlled by a controller or manually or pneumatically.

[0013] Preferably, the slow air intake device is composed of a slow air intake pipeline and a second vacuum valve connected to the slow air intake pipeline, one end of the slow air intake pipeline is connected to the evaporation chamber, and the second vacuum valve is controlled by a controller or manually or pneumatically.

[0014] Preferably, the inlet of the slow air intake device and / or the fast air intake pipeline and / or the air intake valve is equipped with an air intake filter device, and the air intake filter device is a formaldehyde and / or VOC and / or HC and / or dust filter.

[0015] Preferably, the evaporation chamber is provided with a front sealing door and / or a rear sealing door, and the front sealing door and the rear sealing door are respectively manual, electric or pneumatic structures.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a purification and filtering device for purifying the gas inside the evaporation chamber, which can ensure that the pollutants extracted by the vacuum device are processed by the internal purification device, ensure that the gas inside the evaporation chamber is relatively clean, and prevent the pollutants such as VOC, formaldehyde, free gaseous substances and / or hydrocarbons generated by the test sample from filling the evaporator interior and returning to the product again when the evaporator restores pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in Example 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in the second embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in Embodiment 3 of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in Embodiment 4 of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in Example 5 of the present invention;

[0024] Figure 6It is a schematic structural diagram of a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber provided in Example 6 of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0026] Please refer to Figure 1 Embodiment 1 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, including a pressure-bearing evaporation chamber 1, a fast air intake device 2, a slow air intake device 3, an air intake valve 9, a controller 4, a pressure sensor 5 for detecting the pressure in the evaporation chamber 1, at least one group of vacuum devices 6 for evacuating the evaporation chamber 1, and at least one group of purification and filtering devices for purifying the gas inside the evaporation chamber, the pressure sensor 5, the vacuum device 6, and the fast air intake device 2 and / or the slow air intake device 3 are respectively connected to the evaporation chamber 1, and the controller 4 is respectively electrically connected to the pressure sensor 5, the vacuum device 6, and the fast air intake device 2 and / or the slow air intake device 3.

[0027] The various components of this embodiment are described in detail below in conjunction with the accompanying drawings.

[0028] The evaporation chamber 1 is provided with a front sealing door 10 and / or a rear sealing door 11. The front sealing door 10 and the rear sealing door 11 are manual, electric or pneumatic structures.

[0029] The fast air intake device 2 is composed of a fast air intake pipeline 21 and a first vacuum valve 22 connected to the fast air intake pipeline 21. One end of the fast air intake pipeline 21 is connected to the evaporation chamber 1. The first vacuum valve 22 is electrically connected to the controller 4 and is opened or closed by the controller 4. Of course, in other embodiments, the first vacuum valve 22 can also be opened or closed manually or pneumatically controlled.

[0030] The slow air intake device 3 is composed of a slow air intake pipeline 31 and a second vacuum valve 32 connected to the slow air intake pipeline 31. One end of the slow air intake pipeline 31 is connected to the evaporation chamber 1. The second vacuum valve 32 is electrically connected to the controller 4 and is opened or closed by the controller 4. Of course, in other embodiments, the second vacuum valve 32 can also be opened or closed manually or pneumatically controlled.

[0031] The fast air intake device 2 and / or the slow air intake device 3 can control the air intake speed of the evaporation chamber according to the performance of the product, so as to avoid large fluctuations in the pressure in the evaporation chamber and thus avoid damage to the product in the evaporation chamber.

[0032] The air intake valve 9 can also be opened or closed by the controller 4 , or opened or closed manually or pneumatically.

[0033] The controller 4 can be any of the common controllers currently available on the market, such as a computer, a PLC controller, a control cabinet, etc.

[0034] It should be noted that the evaporation chamber may also be provided with only one of the fast air intake device 2, the slow air intake device 3 and the air intake valve 9 or a combination thereof.

[0035] Preferably, the slow air intake device 3 and / or the fast air intake pipeline 21 and / or the inlet of the air intake valve are installed with an air intake filter device 13, wherein the air intake filter device 13 can preferably be set as a formaldehyde and / or VOC and / or HC and / or dust filter.

[0036] The vacuum device 6 includes a check valve 61 and a common vacuum pump or a frequency conversion controlled vacuum pump 62. The check valve 61 and the vacuum pump 62 are connected to the exhaust pipeline of the evaporation chamber 1. The check valve 61 is located at the air inlet end of the vacuum pump 62 or at the air outlet end of the vacuum pump 62. The vacuum pump 62 and the pressure sensor 5 are electrically connected to the controller 4. The controller 4 can obtain the internal pressure of the evaporation chamber collected by the pressure sensor 5, and then control the operation of one or more groups of vacuum pumps 62 through a frequency converter or a switch, thereby controlling the internal pressure of the evaporation chamber 1.

[0037] Of course, in other embodiments, the pressure sensor 5 may also be replaced by a pressure gauge.

[0038] A VOC, formaldehyde and HC recovery device 7 located at the gas outlet end of the vacuum device 6 can also be installed on the exhaust pipeline of the evaporation chamber 1. The VOC, formaldehyde and HC recovery device 7 includes a box body 71 and a refrigeration device 72 installed in the box body 71. The refrigeration device 72 is mainly composed of a compressor, a condenser and an evaporator installed in the VOC, formaldehyde and HC recovery device 7. A discharge control valve 73 for controlling the recovery liquid is installed at the bottom of the box body 71. The VOC, formaldehyde and HC recovery device 7 can condense the VOC, formaldehyde or HC in the gas discharged from the evaporation chamber 1 into a liquid state for recycling, thus turning waste into treasure.

[0039] A purification treatment device 63 may also be installed on the exhaust pipe of the evaporation chamber 1. The purification treatment device 63 may be installed alone at the outlet end of the vacuum device 6, or may be combined with the VOC, formaldehyde and HC recovery device 7 and installed at the outlet end of the VOC, formaldehyde and HC recovery device 7. The purification treatment device 63 can purify the gas exhausted from the evaporation chamber 1. In specific implementation, the purification treatment device 63 may preferably be set as activated carbon, an oxidant for removing formaldehyde, or a water tank.

[0040] The purification and filtering device includes an internal filtering module 81 and a fan or air pump 82. The internal filtering module 81 and the fan or air pump 82 are both located outside the evaporation chamber 1 and connected to the inside of the evaporation chamber 1 through an external circulation pipe 83. Both ends of the external circulation pipe 83 are connected to the inside of the evaporation chamber 1.

[0041] (Large steam rooms have a more pronounced effect)

[0042] The internal filter module 81 may be preferably configured as a formaldehyde, VOC, HC and / or dust filter. The external circulation pipe 83 may be a pressure-bearing pipe. Example

[0043] Please refer to Figure 2 Embodiment 2 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber. Based on the above embodiment 1, a pipeline valve 85 is also installed at the inlet and / or outlet of the external circulation pipeline 83 connected to the evaporation chamber 1. Example

[0044] Please refer to Figure 3 Embodiment 3 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, and its structure is mostly the same as that of the above-mentioned embodiment 1, and the similarities are not repeated here. The difference is that: the purification and filtering device includes an internal filtering module 81 and a fan or air pump 82, and the internal filtering module 81 and the fan or air pump 82 are both located inside the evaporation chamber 1, and the internal filtering module 81 is installed on an internal pipe 84 connected to the fan or air pump 82. Example

[0045] Please refer to Figure 4Embodiment 4 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, and its structure is mostly the same as that of the above-mentioned embodiment 1, and the similarities are not repeated here. The difference is that: the purification and filtering device includes an internal filtering module 81 and a fan or air pump 82, and the internal filtering module 81 and the fan or air pump 82 are both located inside the evaporation chamber 1, and the internal filtering module 81 is installed on one or more inner walls of the evaporation chamber 1, such as the front, back, left, right, top and bottom, and the fan or air pump 82 is located in the sample testing space surrounded by multiple internal filtering modules 81. Example

[0046] Please refer to Figure 5 Embodiment 5 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber, and its structure is mostly the same as that of the above-mentioned embodiment 1, and the similarities are not repeated here. The difference is that: the purification and filtering device includes an internal filtering module 81 and a fan or air pump 82, the internal filtering module 81 is located inside the evaporation chamber 1, and the internal filtering module 81 is installed on one or more inner walls of the evaporation chamber 1, such as front, back, left, right, top and bottom, so that a sample testing space can be surrounded by multiple internal filtering modules 81, and the fan or air pump 82 is located outside the evaporation chamber 1, and the fan or air pump 82 is connected to the inside of the evaporation chamber 1 through an external circulation pipe 83, and both ends of the external circulation pipe 83 are connected to the inside of the evaporation chamber 1, and one end of the external circulation pipe 83 extends into the inner area of ​​the internal filtering module 81 (unfiltered), and the other end of the external circulation pipe 83 is located to the outer area of ​​the internal filtering module 81 (filtered). Example

[0047] Please refer to Figure 6 Embodiment 6 of the present invention provides a VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber. On the basis of the above embodiment 5, a pipeline valve 85 is also installed at the inlet and / or outlet of the external circulation pipeline 83 connected to the evaporation chamber 1.

[0048] During operation, the sample is placed in the evaporation chamber, and the vacuum pump is used to maintain a certain vacuum degree and a certain time, such as vacuuming to 20Kpa and stabilizing the pressure for 2 hours. The vacuum pump can suck out the pollutants from the sample, and the gas in the evaporation chamber can be filtered and purified through the internal filter module, and then the clean air is blown out from the fan or air pump, which can ensure that the gas extracted by the vacuum device is relatively clean, and prevent the VOC, formaldehyde, free gaseous substances and / or hydrocarbons generated by the test samples from being excessively adsorbed in the pipeline and the vacuum device, and prevent the pollutants from filling the evaporator and returning to the product again when the evaporator restores the pressure.

[0049] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber, characterized in that: The invention comprises 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 a pressure gauge (5) for detecting the pressure in the evaporation chamber (1), at least one set of vacuum devices (6) for evacuating the evaporation chamber (1), and at least one set of purification and filtering devices for purifying the gas inside the evaporation chamber (1), wherein the pressure sensor or the 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 respectively connected to the evaporation chamber (1), and the purification and filtering devices are installed inside the evaporation chamber (1) and / or installed outside the evaporation chamber (1) and communicated with the inside of the evaporation chamber (1); the purification and filtering devices comprise an internal filtering module (81) and a fan or an air pump (82 ... and the purification and filtering devices comprise an internal filtering module (81) and a The internal filtering module (81) and the fan or air pump (82) are both located outside the evaporation chamber (1) and connected to the inside of the evaporation chamber (1) via an external circulation pipe (83), and both ends of the external circulation pipe (83) are connected to the inside of the evaporation chamber (1); when working, the sample is placed in the evaporation chamber, and the vacuum pump is evacuated to maintain a certain vacuum degree and a certain time. The vacuum pump can suck out pollutants from the sample, and the gas in the evaporation chamber can be filtered and purified by the internal filtering module, and then clean air is blown out from the fan or air pump, which can ensure that the gas extracted by the vacuum device is relatively clean, prevent the VOC, formaldehyde, free gaseous matter and / or hydrocarbon pollutants generated by the test sample from being excessively adsorbed in the pipe and the vacuum device, and prevent the pollutants from filling the evaporator and returning to the product again when the evaporator restores the pressure.

2. A VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber according to claim 1, characterized in that: The internal filter module (81) is configured as a formaldehyde and / or VOC and / or HC and / or dust filter.

3. The accelerated evaporation chamber for VOC, formaldehyde, free gaseous substances and / or hydrocarbons according to claim 1, characterized in that: The external circulation pipeline (83) is a pressure-bearing pipeline, and a pipeline valve (85) is installed at the inlet and / or outlet of the external circulation pipeline (83) connected to the evaporation chamber (1).

4. The VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber according to claim 1, characterized in that: The vacuum device (6) comprises a check valve (61) and a vacuum pump or a frequency conversion-controlled vacuum pump (62); the check valve (61) and the vacuum pump (62) are connected to an exhaust pipeline of the evaporation chamber (1); the check valve (61) is located at an air inlet end of the vacuum pump (62) or at an air outlet end of the vacuum pump (62); and the vacuum pump (62) and the pressure sensor are electrically connected to a controller (4).

5. The VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber according to claim 1, characterized in that: The exhaust pipe of the evaporation chamber (1) is also provided with a VOC, formaldehyde and HC recovery device (7) located at the outlet end of the vacuum device (6) and / or a purification device (63) for purifying the gas discharged from the evaporation chamber (1). The VOC, formaldehyde and HC recovery device (7) comprises a housing (71) and a refrigeration device (72) installed in the housing (71). The refrigeration device (72) mainly comprises a compressor, a condenser and an evaporator installed in the VOC, formaldehyde and HC recovery device (7). A discharge control valve (73) for controlling the recovery liquid is installed at the bottom of the housing (71). The purification device (63) is activated carbon, an oxidant for removing formaldehyde or a water tank.

6. A VOC, formaldehyde, free gaseous matter and / or hydrocarbon accelerated evaporation chamber according to claim 1, characterized in that: The fast air intake device (2) is composed of a fast air intake pipeline (21) and a first vacuum valve (22) connected to the fast air intake pipeline (21); one end of the fast air intake pipeline (21) is connected to the evaporation chamber (1); and the first vacuum valve (22) is controlled by a controller (4) or manually or pneumatically; the slow air intake device (3) is composed of a slow air intake pipeline (31) and a second vacuum valve (32) connected to the slow air intake pipeline (31); one end of the slow air intake pipeline (31) is connected to the evaporation chamber (1); and the second vacuum valve (32) is controlled by a controller (4) or manually or pneumatically.

7. The VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber according to claim 1, characterized in that: An air intake filter device (13) is installed at the inlet of the slow air intake device (3) and / or the fast air intake pipeline (21) and / or the air intake valve (9), and the air intake filter device (13) is a formaldehyde and / or VOC and / or HC and / or dust filter.

8. A VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber, characterized in that: The invention comprises 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 a pressure gauge (5) for detecting the pressure in the evaporation chamber (1), at least one set of vacuum devices (6) for evacuating the evaporation chamber (1), and at least one set of purification and filtering devices for purifying the gas inside the evaporation chamber (1), wherein the pressure sensor or the 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 respectively connected to the evaporation chamber (1), and the purification and filtering devices are installed inside the evaporation chamber (1) and / or installed outside the evaporation chamber (1) and communicated with the inside of the evaporation chamber (1); the purification and filtering devices comprise an internal filtering module (81) and a fan or an air pump (82), and the internal filtering module ( The evaporation chamber (1) is provided with a vacuum pump (81) and a fan or air pump (82), and the internal filter module (81) is installed on an internal pipe (84) connected to the fan or air pump (82), or the internal filter module (81) is installed on one or more inner walls of the evaporation chamber (1). When the evaporation chamber is in operation, the sample is placed in the evaporation chamber, and the vacuum pump is used to evacuate the sample and maintain a certain vacuum degree for a certain period of time. The vacuum pump can suck out the pollutants from the sample, and the gas in the evaporation chamber can be filtered and purified by the internal filter module, and then the clean air is blown out from the fan or air pump, which can ensure that the gas extracted by the vacuum device is relatively clean, prevent the pollutants such as VOC, formaldehyde, free gaseous substances and / or hydrocarbons generated by the test sample from being excessively adsorbed in the pipe and the vacuum device, and prevent the pollutants from filling the evaporation chamber and returning to the product again when the evaporator restores the pressure.

9. A VOC, formaldehyde, free gaseous substances and / or hydrocarbon accelerated evaporation chamber, characterized in that: The invention comprises 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 a pressure gauge (5) for detecting the pressure in the evaporation chamber (1), at least one set of vacuum devices (6) for evacuating the evaporation chamber (1), and at least one set of purification and filtering devices for purifying the gas inside the evaporation chamber (1), wherein the pressure sensor or the 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 respectively connected to the evaporation chamber (1), and the purification and filtering devices are installed inside the evaporation chamber (1) and / or installed outside the evaporation chamber (1) and communicated with the inside of the evaporation chamber (1); the purification and filtering devices comprise an internal filtering module (81) and a fan or an air pump (82), and the internal filtering module (81) is located inside the evaporation chamber (1). and / or installed on one or more inner walls of the evaporation chamber (1), the fan or air pump (82) is located outside the evaporation chamber (1), the fan or air pump (82) is connected to the inside of the evaporation chamber (1) through an external circulation pipe (83), and both ends of the external circulation pipe (83) are connected to the inside of the evaporation chamber (1); when working, the sample is placed in the evaporation chamber, and the vacuum pump is evacuated to maintain a certain vacuum degree and a certain time. The vacuum pump can suck out pollutants from the sample, and the gas in the evaporation chamber can be filtered and purified by the internal filter module, and then clean air is blown out from the fan or air pump, which can ensure that the gas extracted by the vacuum device is relatively clean, prevent the VOC, formaldehyde, free gaseous matter and / or hydrocarbon pollutants generated by the test sample from being excessively adsorbed in the pipe and the vacuum device, and prevent the pollutants from filling the evaporator and returning to the product again when the evaporator restores the pressure.

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