Gas dryer and whole vehicle emission test system

Abstract

The utility model discloses a gas dryer and a whole vehicle emission test system, which are particularly suitable for gas treatment in a whole vehicle emission test. The gas dryer comprises a bottle body and a bottle cap, the bottle body is of a hollow structure, is used for containing a drying agent and is provided with a gas inlet and a gas outlet, and gas is treated through the drying agent when passing through the bottle body. The bottle cap and the bottle body are connected through threads, and filter screens with an air inlet and an air outlet are arranged in the bottle cap and the bottle body respectively to prevent foreign matters from entering and drying agents from flowing out. In addition, the gas dryer is further provided with a humidity sensor, a main control module and a sound alarm, and the failure state of the drying agent is monitored. When the humidity sensor detects that the desiccant absorbs too much moisture, the main control module controls the alarm to give an alarm to remind a user to replace the desiccant in time. The gas dryer is suitable for a whole vehicle emission test system, can ensure that the gas is dry and pure, improves the test precision, and reduces the use and maintenance cost at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of gas drying, and more specifically, to a gas dryer and a whole vehicle emission testing system. Background Art

[0002] Currently, gas dryers, commonly used in vehicle emission equipment, are widely used in fields such as engine testing to ensure gas dryness during testing. However, existing gas dryers mostly utilize an integrated molding design. While this design is characterized by its simple structure and straightforward installation, it has significant limitations in practical application. As testing time increases, the desiccant inside the dryer gradually loses its effectiveness, making it unable to effectively dry the gas, leading to a rapid decline in dryer performance.

[0003] Once a dryer fails, it's usually impossible to replace the desiccant inside it; the only solution is to replace the entire dryer assembly. This approach results in high replacement costs, often exceeding thousands of yuan per dryer. Furthermore, frequent replacement significantly increases testing costs and maintenance complexity. Furthermore, as a consumable item, frequent replacement of the dryer can negatively impact the environment and exacerbate resource waste.

[0004] Another drawback of existing technology is that many dryers lack effective filtration systems to prevent foreign matter from entering the dryer. This lack of proper filter design allows impurities and tiny particles in the gas to easily enter the device, contaminating the desiccant or damaging the equipment. This lack of filtration reduces the dryer's service life and can affect the accuracy and stability of the entire emissions testing system. Utility Model Content

[0005] In order to overcome the above technical problems, the utility model provides a gas dryer and a whole vehicle emission testing system.

[0006] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0007] A gas dryer comprises a bottle body and a bottle cap threadedly connected to the bottle body, wherein an air inlet is provided at one end of the bottle cap away from the bottle body;

[0008] The bottle body is a hollow structure, and an air outlet is provided at one end of the bottle body away from the bottle cap; the internal space of the bottle body constitutes a accommodating cavity, and a desiccant is provided in the accommodating cavity;

[0009] A first filter is provided in the bottle cap, and the first filter is located between the air inlet and the accommodating cavity;

[0010] A second filter is provided in the bottle body, and the second filter is located between the air outlet and the accommodating cavity.

[0011] Furthermore, an outer wall of the bottle body at one end away from the air outlet is provided with an external thread, and an inner wall of the bottle cap is provided with an internal thread adapted to the external thread.

[0012] Furthermore, the accommodating cavity and the air outlet in the bottle body are integrally formed, and the outer diameter of the first filter is the same as the outer diameter of the end of the bottle body away from the air outlet.

[0013] Furthermore, a sound alarm is provided on the outside of the bottle body, and a main control module, a humidity sensor and a power supply module are provided on the inside of the bottle body;

[0014] The humidity sensor, the sound alarm and the power module are all electrically connected to the main control module. The main control module is configured to control the sound alarm to emit a sound alarm when the humidity detected by the humidity sensor is greater than a set threshold.

[0015] Furthermore, the humidity sensor is a resistive moisture absorption sensor, which is embedded in the desiccant and configured to determine the humidity of the desiccant based on the resistance of the desiccant.

[0016] Furthermore, the main control module and the power supply module are fixed on the inner wall of the bottle body.

[0017] Furthermore, the bottle body is provided with a wire hole, and the humidity sensor is electrically connected to the main control module by a wire passing through the wire hole.

[0018] Furthermore, sealant is coated between the wire hole and the gap between the wires.

[0019] A whole vehicle emission testing system is provided, wherein a gas processing device is provided, and the gas processing device includes the aforementioned gas dryer.

[0020] Furthermore, the vehicle emission test system also includes an exhaust sampling probe and a gas analyzer;

[0021] The exhaust sampling probe is installed on the vehicle exhaust pipe and is used to collect exhaust gas samples from the vehicle exhaust pipe;

[0022] The exhaust gas collected by the exhaust sampling probe is transmitted to the gas processing device through a gas transmission pipeline;

[0023] The gas analyzer is connected to the gas processing device and is used to receive the dried gas and perform measurement.

[0024] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0025] This utility model provides a gas dryer and vehicle emissions testing system. The gas dryer features a detachable design, allowing the desiccant to be replaced individually, reducing operating costs. Furthermore, the gas dryer is equipped with a dual filter structure, effectively preventing foreign matter from entering and preventing desiccant loss. Furthermore, the gas dryer integrates a humidity sensor and alarm, enabling automated monitoring of desiccant failure and enhancing the device's intelligence. This overall design ensures the device's tightness, maintainability, and ease of operation, while effectively improving the accuracy and stability of vehicle emissions testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic structural diagram of a gas dryer provided in one embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the three-dimensional structure of a gas dryer provided in one embodiment of the present application;

[0029] Figure 3 is a system block diagram of a humidity alarm system provided in one embodiment of the present application;

[0030] Description of the marks in the figure:

[0031] 1. Air inlet; 2. Bottle cap; 3. First filter; 4. External thread; 5. Bottle body; 6. Accommodation cavity; 7. Second filter; 8. Air outlet; 9. Main control module; 10. Humidity sensor; 11. Sound alarm; 12. Power module. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0033] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper", "lower", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the scope of protection of the present invention. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] Unless otherwise expressly specified or limited, terms such as "installed," "installed," "connected," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0035] Example 1:

[0036] like Figure 1-2 As shown, the utility model provides a technical solution:

[0037] A gas dryer comprises a bottle body 5 and a bottle cap 2 threadedly connected to the bottle body 5, wherein an air inlet 1 is provided at one end of the bottle cap 2 away from the bottle body 5;

[0038] The bottle body 5 is a hollow structure, and an air outlet 8 is provided at one end of the bottle body 5 away from the bottle cap 2; the internal space of the bottle body 5 constitutes a accommodating cavity 6, and a desiccant is provided in the accommodating cavity 6;

[0039] A first filter screen 3 is provided in the bottle cap 2 and is located between the air inlet 1 and the accommodating cavity 6;

[0040] A second filter screen 7 is provided in the bottle body 5 , and the second filter screen 7 is located between the air outlet 8 and the accommodating cavity 6 .

[0041] In this embodiment, the gas dryer is designed such that the bottle body 5 and the bottle cap 2 are connected by threads, thereby ensuring the sealing performance of the device and facilitating the user to remove and replace the desiccant. The bottle body 5 is a hollow structure, and the cavity 6 is used to store the desiccant, thereby achieving gas drying.

[0042] The desiccant is granular, and the bottle body 5 and bottle cap 2 are respectively provided with filters, which effectively prevent foreign matter from entering the accommodating chamber 6, protect the desiccant from contamination, and prevent the desiccant from escaping from the gas outlet 8. Through this design, the gas undergoes double filtration during the process of entering and leaving the dryer, improving the cleanliness and drying effect of the system. The overall structure is easy to maintain and replace, reducing the user's usage cost and operational complexity.

[0043] Example 2:

[0044] Based on Example 1, Figure 1-2 The outer wall of the bottle body 5 at one end away from the air outlet 8 is provided with an external thread 4, and the inner wall of the bottle cap 2 is provided with an internal thread adapted to the external thread 4.

[0045] Furthermore, the accommodating cavity 6 and the air outlet 8 in the bottle body 5 are integrally formed, and the outer diameter of the first filter 3 is the same as the outer diameter of the end of the bottle body 5 away from the air outlet 8 .

[0046] Further, if Figure 3 The humidity alarm system shown includes a main control module 9, a humidity sensor 10, an audible alarm 11 and a power supply module 12;

[0047] The outside of the bottle body 5 is provided with a sound alarm 11, and the inside of the bottle body 5 is provided with a main control module 9, a humidity sensor 10 and a power supply module 12;

[0048] The humidity sensor 10, the sound alarm 11 and the power module 12 are all electrically connected to the main control module 9. The main control module 9 is configured to control the sound alarm 11 to emit a sound alarm when the humidity detected by the humidity sensor 10 is greater than a set threshold;

[0049] In this solution, intelligent monitoring of the dryer's working status is achieved by integrating an audible alarm 11, a humidity sensor 10, and a main control module 9 on the dryer. When the humidity sensor 10 detects that the desiccant humidity exceeds a set threshold, the main control module 9 controls the audible alarm 11 to sound an audible alarm to remind the user that the desiccant has expired and needs to be replaced. This design greatly facilitates user use and avoids the situation where the test equipment cannot work properly due to desiccant failure.

[0050] Furthermore, the humidity sensor 10 is a resistive moisture absorption sensor, which is embedded in the desiccant and configured to determine the humidity of the desiccant based on the resistance of the desiccant;

[0051] The resistive moisture absorption sensor determines the saturation level of the desiccant by detecting the change in resistance after the desiccant absorbs moisture. As the desiccant gradually absorbs moisture from the gas, the material's conductivity changes, causing the resistance value detected by the sensor to change. When the resistance value reaches a preset threshold, indicating that the desiccant is close to saturation, the system triggers an alarm, prompting the user to replace the desiccant.

[0052] Furthermore, the main control module 9 and the power supply module 12 are fixed on the inner wall of the bottle body 5 .

[0053] Furthermore, the bottle body 5 is provided with a wire hole, and the humidity sensor 10 is electrically connected to the main control module 9 by a wire passing through the wire hole.

[0054] Furthermore, a sealant is applied between the wire hole and the gap between the wires;

[0055] The function of the sealant is to prevent gas from leaking through the wire holes, ensuring the airtightness of the entire gas dryer. It can also protect the wires and prevent them from being damaged by external environmental factors. Through this design, the sealing performance of the dryer is further improved, ensuring its stable operation in various complex environments.

[0056] Example 3:

[0057] The utility model provides a technical solution:

[0058] A whole vehicle emission testing system is provided, wherein a gas processing device is provided, and the gas processing device includes the aforementioned gas dryer.

[0059] Example 4:

[0060] Based on Example 3, the vehicle emission testing system further includes an exhaust sampling probe and a gas analyzer;

[0061] The exhaust sampling probe is installed on the vehicle exhaust pipe and is used to collect exhaust gas samples from the vehicle exhaust pipe;

[0062] The exhaust gas collected by the exhaust sampling probe is transmitted to the gas processing device through a gas transmission pipeline;

[0063] The gas analyzer is connected to the gas processing device and is used to receive the dried gas and perform measurement.

[0064] This vehicle emissions testing system collects exhaust gas samples using an exhaust sampling probe and transports them to a gas processing unit. After drying, samples are then transferred to a gas analyzer for measurement. This system design not only ensures that collected exhaust gas samples are unaffected by humidity and impurities, but also improves the accuracy and efficiency of emissions measurement. The gas dryer effectively removes moisture from the exhaust gas, preventing moisture from damaging the analyzer's sensor or affecting test results, thereby ensuring measurement reliability.

[0065] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A gas dryer, characterized in that: It comprises a bottle body (5) and a bottle cap (2) threadedly connected to the bottle body (5), wherein an air inlet (1) is provided at one end of the bottle cap (2) away from the bottle body (5); The bottle body (5) is a hollow structure, and an air outlet (8) is provided at one end of the bottle body (5) away from the bottle cap (2); the internal space of the bottle body (5) constitutes a receiving cavity (6), and a desiccant is provided in the receiving cavity (6); A first filter (3) is provided in the bottle cap (2), and the first filter (3) is located between the air inlet (1) and the accommodating cavity (6); A second filter (7) is provided in the bottle body (5), and the second filter (7) is located between the air outlet (8) and the accommodating cavity (6).

2. The gas dryer according to claim 1, characterized in that An outer wall of the bottle body (5) at one end away from the gas outlet (8) is provided with an external thread (4), and an inner wall of the bottle cap (2) is provided with an internal thread adapted to the external thread (4).

3. The gas dryer according to claim 1, characterized in that The accommodating cavity (6) and the air outlet (8) in the bottle body (5) are integrally formed, and the outer diameter of the first filter screen (3) is the same as the outer diameter of the end of the bottle body (5) away from the air outlet (8).

4. The gas dryer according to claim 1, characterized in that The outside of the bottle body (5) is provided with a sound alarm (11), and the inside of the bottle body (5) is provided with a main control module (9), a humidity sensor (10) and a power supply module (12); The humidity sensor (10), the sound alarm (11) and the power module (12) are all electrically connected to the main control module (9), and the main control module (9) is configured to control the sound alarm (11) to emit a sound alarm when the humidity detected by the humidity sensor (10) is greater than a set threshold.

5. The gas dryer according to claim 4, characterized in that The humidity sensor (10) adopts a resistive moisture absorption sensor, which is embedded in the desiccant and configured to determine the humidity of the desiccant based on the resistance of the desiccant.

6. The gas dryer according to claim 4, characterized in that The main control module (9) and the power supply module (12) are fixed on the inner wall of the bottle body (5).

7. The gas dryer according to claim 4, characterized in that The bottle body (5) is provided with a wire hole, and the humidity sensor (10) is electrically connected to the main control module (9) via a wire passing through the wire hole.

8. The gas dryer according to claim 7, characterized in that Sealant is applied between the wire-passing hole and the gap between the wires.

9. A vehicle emission testing system, characterized in that: The vehicle emission testing system is provided with a gas processing device, and the gas processing device includes the gas dryer according to any one of claims 1 to 8.

10. The vehicle emission testing system according to claim 9, characterized in that: The vehicle emission test system also includes an exhaust sampling probe and a gas analyzer; The exhaust sampling probe is installed on the vehicle exhaust pipe and is used to collect exhaust gas samples from the vehicle exhaust pipe; The exhaust gas collected by the exhaust sampling probe is transmitted to the gas processing device through a gas transmission pipeline; The gas analyzer is connected to the gas processing device and is used to receive the dried gas and perform measurement.

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