Evaporation chamber

Abstract

The present invention discloses an evaporation closed chamber, comprising an aisle cabin and a closed cabin located inside the aisle cabin, a test cabin is arranged inside the closed cabin, an internal circulation air duct is formed between the closed cabin and the test cabin, the internal circulation air duct is connected to the test cabin, a fresh air intake pipe and an exhaust gas discharge pipe are arranged on the closed cabin, a fresh air intake valve is arranged on the fresh air intake pipe, an exhaust valve is arranged on the exhaust gas discharge pipe, an external air bag is arranged outside the closed cabin and / or an internal air bag is arranged inside the closed cabin, a first external air bag pipeline is connected to the external air bag, a first external air bag pipeline is arranged on the first external air bag pipeline, an internal air bag pipeline is arranged on the internal air bag, and an internal air bag valve is arranged on the internal air bag pipeline. The present invention can compensate indoor gas through the action of the external air bag and the internal air bag, and can avoid the situation that outdoor gas enters the room due to the pressure difference and mixes with the indoor gas to pollute the indoor gas, thereby causing inaccurate gas detection data.

Description

Technical Field

[0001] The invention relates to the technical field of automobile testing equipment, and more specifically to an evaporation closed chamber. Background Art

[0002] The fuel tank, tires, car exterior, car chassis and other parts of the car may emit harmful substances. When the concentration of volatile harmful substances exceeds a certain range, it will cause harm to the human body. Therefore, it is necessary to collect and test the harmful substances in the car.

[0003] However, the volume inside the existing evaporation closed chamber is generally fixed, and the volume of the closed chamber cannot be changed according to the detection requirements during detection. When the internal temperature of the closed chamber changes, the volume of the closed chamber cannot be changed, resulting in external contaminant gas entering the closed chamber due to the pressure difference, affecting the accuracy of the test and failing to meet the detection requirements at various temperatures. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned defects in the prior art and to provide an evaporation sealed chamber which can prevent outdoor gas from entering the room due to pressure difference and affecting the test accuracy.

[0005] To achieve the above-mentioned object, the present invention provides an evaporative closed chamber, comprising a closed cabin and an aisle cabin for controlling the ambient temperature and / or humidity outside the closed cabin, the closed cabin being located inside the aisle cabin, a test cabin being provided inside the closed cabin, an internal circulation duct for controlling the ambient temperature and / or humidity inside the closed cabin being formed between the closed cabin and the test cabin, the internal circulation duct being connected to the test cabin, a fresh air intake pipe and an exhaust gas discharge pipe extending out of the aisle cabin being provided on the closed cabin, a fresh air intake valve being provided on the fresh air intake pipe, and an exhaust gas discharge pipe being provided on the exhaust gas discharge pipe; an external air bag being provided outside the closed cabin and / or an internal air bag being provided inside the closed cabin, a first external air bag pipe extending into the interior of the closed cabin being connected to the external air bag, a first external air bag valve being provided on the first external air bag pipe, an internal air bag pipe extending out of the closed cabin being provided on the internal air bag, and an internal air bag valve being provided on the internal air bag pipe.

[0006] As a preferred embodiment, the inner wall of the closed cabin and all or part of the components arranged inside it are coated with a low-adsorption and low-release coating.

[0007] As a preferred embodiment, an internal circulation fan is provided inside the internal circulation air duct, and a closed cabin temperature control device is provided inside the internal circulation air duct or on the outer wall of the closed cabin, and the closed cabin temperature control device is a heater, a liquid medium thermostat or an electronic refrigerator.

[0008] As a preferred embodiment, the electronic refrigerator is an electronic refrigeration plate with one end in close contact with the outer wall of the closed cabin, and the maximum temperature of the electronic refrigeration plate at one end in close contact with the outer wall of the closed cabin is limited by a controller. Alternatively, the electronic refrigerator is an electronic refrigeration plate installed inside an internal circulation air duct, and one end of the electronic refrigeration plate is connected to a liquid medium heat transfer device for heat exchange between the electronic refrigeration plate and the outside of the closed cabin, and the maximum temperature of the two ends of the electronic refrigeration plate is limited by a controller.

[0009] As a preferred embodiment, the external air bag is also connected to a second external air bag pipeline, the second external air bag pipeline is provided with a second external air bag valve, the second external air bag pipeline is connected to an external air bag air pump and / or an external air bag gas flow meter and a first flow meter valve at the flow meter inlet.

[0010] As a preferred embodiment, the first external air bag pipeline is connected to an external air bag blower located between the external air bag and the first external air bag valve.

[0011] As a preferred embodiment, the internal air bag pipeline is connected to an internal air bag air pump and / or an internal air bag gas flow meter and a second flow meter valve at the flow meter inlet.

[0012] As a preferred embodiment, the fresh air inlet pipe is connected to a fresh air filter and an air supply fan located at the inlet of the fresh air filter.

[0013] As a preferred embodiment, the exhaust gas exhaust pipe is connected to an exhaust gas exhaust fan.

[0014] As a preferred embodiment, an external circulation air duct is provided outside the closed cabin, both ends of the external circulation air duct are connected to the closed cabin, a first circulation return air valve and a second circulation return air valve are provided on the external circulation air duct, and a clean filter and an external circulation fan located between the first circulation return air valve and the second circulation return air valve are connected to the external circulation air duct.

[0015] As a preferred embodiment, a switch door is provided on the side of the enclosed cabin.

[0016] As a preferred embodiment, the interior of the aisle cabin is provided with an aisle temperature control device located outside the closed cabin, and the aisle temperature control device includes an aisle fan, an aisle heater and / or an aisle cooler.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The structure of the present invention is simple. An external air bag is provided on the outside of the closed cabin and / or an internal air bag is provided on the inside. The indoor gas can be compensated by the external air bag and / or the internal air bag to ensure that the total amount of indoor gas remains unchanged. This can prevent outdoor gas from entering the room due to pressure difference and mixing with the indoor gas to pollute the indoor gas, thereby causing inaccurate gas detection data. The test accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a structural schematic diagram of the evaporation closed chamber provided by the present invention. DETAILED DESCRIPTION

[0021] 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.

[0022] Please refer to Figure 1 An embodiment of the present invention provides an evaporation closed chamber, including a stainless steel closed cabin body 1 and a channel cabin body 31 for controlling the ambient temperature and / or humidity outside the closed cabin body 1 , wherein the closed cabin body 1 is located inside the channel cabin body 31 .

[0023] A test cabin 2 is provided inside the closed cabin 1, and an internal circulation air duct 3 for controlling the ambient temperature and / or humidity inside the closed cabin 1 is formed between the closed cabin 1 and the test cabin 2, wherein the ceiling and side panels of the test cabin 2 may be provided with ventilation holes, so that the two ends of the internal circulation air duct 3 are respectively connected to the top and side of the test cabin 2.

[0024] The internal circulation air duct 3 may be provided with an internal circulation fan 4 and a temperature control device 5. The temperature control device 5 may be a common temperature control device such as a heater, a liquid medium thermostat or an electronic refrigerator. As long as it can adjust and control the indoor temperature, it can be implemented, not limited to this embodiment. Of course, a humidifier may also be provided. In addition, the temperature control device 5 may also be provided on the outer wall of the closed cabin 1.

[0025] For example, when the temperature control device 5 adopts an electronic refrigerator (such as an electronic cooling plate), the electronic refrigerator is an electronic cooling plate with one end tightly attached to the outer wall of the closed cabin body 1, and the electronic cooling plate limits the maximum temperature of the end of the electronic cooling plate tightly attached to the outer wall of the closed cabin body 1 through a controller. Alternatively, the electronic refrigerator is an electronic cooling plate installed inside the internal circulation air duct 3, and one end of the electronic cooling plate is connected to a liquid medium heat transfer device for heat exchange between the electronic cooling plate and the outside of the closed cabin body 1, and the electronic cooling plate limits the maximum temperature of both ends of the electronic cooling plate through a controller.

[0026] A fresh air intake pipe 6 connected to the room is provided on the side of the closed cabin 1, and a fresh air intake valve 8 is provided on the fresh air intake pipe 6. A fresh air filter 23 and an air supply fan 37 located at the entrance of the fresh air filter 23 are connected to the fresh air intake pipe 6. The fresh air filter 23 can purify and filter the gas entering the room. The fresh air filter 23 can be set as one of a TVOC activated carbon filter, a primary dust filter and a high-efficiency dust filter or a combination thereof, and of course other gas filters can also be used.

[0027] An exhaust gas discharge pipe 7 communicating with the interior of the room is disposed on the top of the sealed cabin 1 , an exhaust gas discharge pipe 7 is provided with an exhaust valve 9 , and an exhaust gas discharge fan 24 is connected to the exhaust gas discharge pipe 7 .

[0028] An external circulation duct 25 is provided outside the closed cabin 1, and the two ends of the external circulation duct 25 can be connected to the top and the side of the closed cabin 1. The external circulation duct 25 is provided with a first circulation return air valve 26 and a second circulation return air valve 27. The external circulation duct 25 is connected with a clean filter 28 and an external circulation fan 29 located between the first circulation return air valve 26 and the second circulation return air valve 27. The clean filter 28 can purify and filter the indoor gas. Among them, the clean filter 28 can be set as one of a TVOC activated carbon filter, a primary dust filter and a high-efficiency dust filter or a combination thereof, and of course other gas filters can also be used.

[0029] The side of the airtight cabin 1 is provided with a switch door 30, which is convenient for driving a car into the test cabin 2. Of course, the aisle cabin 31 can also be provided with a switch door.

[0030] An external air bag 10 is provided on the outside of the closed cabin 1 (such as the outside of the aisle cabin or the area between the inside of the aisle cabin and the closed cabin), and the external air bag 10 is connected to a first external air bag pipe 11 extending into the interior of the closed cabin 1 (such as the inside of the test cabin or the inside of the internal circulation air duct), and the first external air bag pipe 11 is provided with a first external air bag valve 12.

[0031] In order to speed up the air intake of the external air bag 10, the first external air bag pipeline 11 may also be connected to an external air bag fan 21 located between the external air bag 10 and the first external air bag valve 12. Of course, even without the external air bag fan 21, the gas in the test chamber 2 can also flow into the external air bag 10 naturally.

[0032] In order to facilitate the exhaust of the external air bag 10, the external air bag 10 may also be connected to a second external air bag pipe 17 located outside the sealed cabin 1, and a second external air bag valve 18 is provided on the second external air bag pipe 17. Preferably, the second external air bag pipe 17 is also connected to an external air bag air pump 19 and an external air bag gas flow meter 20 located between the external air bag air pump 19 and the second external air bag valve 18, and a first flow meter valve 32 at the flow meter inlet.

[0033] An internal air bag 13 is provided inside the closed cabin 1 (such as inside the test cabin or inside the internal circulating air duct). The internal air bag 13 is connected to an internal air bag air pump 15 located outside the aisle cabin through an internal air bag pipe 14 extending outside the aisle cabin. The internal air bag pipe 14 is provided with an internal air bag valve 16 located between the internal air bag and the internal air bag air pump 15.

[0034] In addition, the internal air bag pipeline 14 may also be connected to an internal air bag gas flow meter 22 located between the internal air bag air pump 15 and the internal air bag valve 16 and a second flow meter valve 33 at the flow meter inlet.

[0035] An aisle temperature control device located outside the closed cabin 1 is provided inside the aisle cabin body 31 , and the aisle temperature control device includes an aisle fan 34 , an aisle heater 35 and / or an aisle cooler 36 .

[0036] The inner wall of the closed cabin 1 and all or part of the components arranged inside it are coated with a low-adsorption and low-release coating.

[0037] The working principle of the present invention is as follows:

[0038] 1. When the indoor temperature drops, the internal air bag valve 16 and the internal air bag air pump 15 are opened, and the internal air bag air pump 15 inflates the internal air bag 13 to expand it; when the indoor temperature rises, the first external air bag valve 12 and the external air bag fan 21 are opened, and the external air bag fan 21 allows the gas in the test chamber to enter the external air bag 10 to expand it; all of the above play a role in compensating the indoor gas and ensuring that the total amount of indoor gas remains unchanged, which can prevent outdoor gas from entering the room and mixing with the indoor gas to pollute the indoor gas, thereby causing inaccurate gas detection data.

[0039] 2. After the test is completed, if it is necessary to clean the internal air of the external air bag 10, the second external air bag valve 18 can be opened, and the external air bag air pump 19 can draw air to the outside to exhaust the air.

[0040] 3. When the internal air bag 13 is used, the internal air bag air pump 15 can be actively opened as needed, the internal air bag valve 16 can be opened to replenish gas to the internal air bag, or the internal air bag gas flow meter 22 can be used to open the second flow meter valve 33 to replenish gas to the internal air bag.

[0041] 4. In addition to drawing air and exhausting gas to the outside, the external air bag air pump 19 can also be actively opened as needed to open the second external air bag valve 18 to replenish gas to the external air bag, or the first flow meter valve 32 can be opened through the external air bag gas flow meter 20 to replenish gas to the external air bag.

[0042] 5. The airflow direction in the cabin flow channel is not limited to counterclockwise, the opposite direction also meets the requirements.

[0043] It should be noted that in other embodiments, according to actual needs, an external air bag or an internal air bag may be provided separately.

[0044] 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. An evaporation closed chamber, characterized in that: The invention comprises a closed cabin (1) and a side cabin (31) for controlling the ambient temperature and / or humidity outside the closed cabin (1), the closed cabin (1) being located inside the side cabin (31), a test cabin (2) being provided inside the closed cabin (1), an internal circulation duct (3) for controlling the ambient temperature and / or humidity inside the closed cabin (1) being formed between the closed cabin (1) and the test cabin (2), the internal circulation duct (3) being connected to the test cabin (2), the ceiling and side panels of the test cabin (2) being provided with ventilation holes, and two ends of the internal circulation duct (3) being respectively connected to the top and side of the test cabin (2); The enclosed cabin (1) is provided with a fresh air intake pipe (6) and an exhaust gas discharge pipe (7) extending out of the aisle cabin (31); the fresh air intake pipe (6) is provided with a fresh air intake valve (8), and the exhaust gas discharge pipe (7) is provided with an exhaust valve (9); An external air bag (10) is provided outside the sealed cabin (1) and an internal air bag (13) is provided inside the sealed cabin (1); the external air bag (10) is connected to a first external air bag pipe (11) extending into the sealed cabin (1); the first external air bag pipe (11) is provided with a first external air bag valve (12); the internal air bag (13) is provided with an internal air bag pipe (14) extending outside the sealed cabin (1); the internal air bag pipe (14) is provided with an internal air bag valve (16); An internal circulation fan (4) is provided inside the internal circulation air duct (3), and a closed cabin temperature control device (5) is provided inside the internal circulation air duct (3) or on the outer wall of the closed cabin (1), wherein the closed cabin temperature control device (5) is a heater, a liquid medium thermostat and / or an electronic refrigerator; The interior of the aisle cabin (31) is provided with an aisle temperature control device located outside the closed cabin (1), and the aisle temperature control device comprises an aisle fan (34), an aisle heater (35) and an aisle cooler (36).

2. The evaporation closed chamber according to claim 1, characterized in that: The electronic refrigerator is an electronic refrigeration plate with one end in close contact with the outer wall of the closed cabin (1), and the maximum temperature of the electronic refrigeration plate at the end in close contact with the outer wall of the closed cabin (1) is limited by a controller. Alternatively, the electronic refrigerator is an electronic refrigeration plate installed inside the internal circulation air duct (3), and one end of the electronic refrigeration plate is connected to a liquid medium heat transfer device for heat exchange between the electronic refrigeration plate and the outside of the closed cabin (1), and the maximum temperature of the two ends of the electronic refrigeration plate is limited by a controller.

3. The evaporation closed chamber according to claim 1, characterized in that: The external air bag (10) is also connected to a second external air bag pipeline (17), the second external air bag pipeline (17) is provided with a second external air bag valve (18), and the second external air bag pipeline (17) is connected to an external air bag air pump (19) and / or an external air bag gas flow meter (20) and a first flow meter valve (32) at the flow meter inlet.

4. The evaporation closed chamber according to claim 1, characterized in that: The first external air bag pipeline (11) is connected to an external air bag blower (21) located between the external air bag (10) and the first external air bag valve (12).

5. The evaporation closed chamber according to claim 1, characterized in that: The internal air bag pipeline (14) is connected to an internal air bag air pump (15) and / or an internal air bag gas flow meter (22) and a second flow meter valve (33) at the flow meter inlet.

6. The evaporation sealed chamber according to claim 1, characterized in that: The fresh air intake pipe (6) is connected to a fresh air filter (23) and an air supply fan (37) located at the entrance of the fresh air filter (23); the exhaust gas discharge pipe (7) is connected to an exhaust gas discharge fan (24); and a switch door (30) is provided on the side of the closed cabin (1).

7. The evaporation sealed chamber according to claim 1, characterized in that: The inner wall of the closed cabin (1) and all or part of the components arranged inside it are coated with a low-absorption and low-release coating.

8. The evaporation sealed chamber according to claim 1, characterized in that: An external circulation air duct (25) is provided outside the closed cabin (1), and both ends of the external circulation air duct (25) are connected to the closed cabin (1). A first circulation return air valve (26) and a second circulation return air valve (27) are provided on the external circulation air duct (25). A clean filter (28) and an external circulation fan (29) located between the first circulation return air valve (26) and the second circulation return air valve (27) are connected to the external circulation air duct (25).

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