Oxygen concentration measuring device with filtering function

Abstract

The utility model relates to the field of oxygen measurement, and discloses an oxygen concentration measuring device with a filtering function, which comprises a filtering valve seat, a filter and an oxygen sensor, and the filtering valve seat is provided with an air inlet and a first airflow channel; an inlet of the filter is communicated with the air inlet; and an inlet of the oxygen sensor is communicated with an outlet of the filter through the first airflow channel. The device has the beneficial effects that the filter is arranged to filter moisture and other impurities in the reflow furnace, so that the filtered airflow enters the first airflow channel from the outlet of the filter and then enters the oxygen sensor from the first airflow channel for oxygen content detection; moisture and other impurities in the reflow furnace are prevented from entering the oxygen sensor, and the quality and the service life of the oxygen sensor are ensured.

Description

Technical Field

[0001] This utility model relates to the field of oxygen measurement, and specifically to an oxygen concentration measuring device with a filter. Background Technology

[0002] In a reflow oven, the oxygen content affects the quality of the solder joints. A high-oxygen environment can corrode the materials and furnace tubes, shortening the equipment's lifespan and significantly reducing production quality. Therefore, it is necessary to monitor the oxygen content within the reflow oven.

[0003] Because the reflux furnace contains water and other impurities, these impurities can enter the oxygen sensor during oxygen content detection, resulting in a short lifespan for the oxygen sensor. Utility Model Content

[0004] The technical problem this invention aims to solve is that when using an oxygen sensor to detect oxygen in a reflux furnace, impurities in the reflux furnace can enter the oxygen sensor, reducing its lifespan. The purpose is to provide an oxygen concentration measuring device with a filter, which filters out moisture and other impurities in the reflux furnace before measuring oxygen content, preventing water and other impurities from entering the oxygen sensor and ensuring the quality and lifespan of the oxygen sensor.

[0005] This utility model is achieved through the following technical solution:

[0006] An oxygen concentration measuring device with a filter includes a test housing, a filter, and an oxygen sensor. The test housing has a test cavity and an air inlet. The inlet of the filter is connected to the air inlet. The measuring end of the oxygen sensor is located inside the test cavity. The test cavity is connected to the outlet of the filter through a first airflow channel.

[0007] The beneficial effect of this utility model is that by setting an air inlet on the test housing and connecting the filter inlet to the air inlet, the sample gas in the reflux furnace can easily enter the filter. The filter removes moisture and other impurities from the reflux furnace, allowing the filtered sample gas to enter the first airflow channel from the filter outlet. Then, the sample gas enters the test cavity equipped with an oxygen sensor from the first airflow channel to detect the oxygen content. This prevents moisture and other impurities from the reflux furnace from entering the oxygen sensor, ensuring the quality and service life of the oxygen sensor.

[0008] In some embodiments, a filter valve seat is further included. The first airflow channel includes a connected measurement inlet channel and a filter outlet channel. The filter outlet channel is disposed on the filter valve seat and communicates with the outlet of the filter. The measurement inlet channel communicates with the test cavity. By providing the measurement inlet channel and the filter outlet channel, it is convenient to guide the airflow (sample gas) flowing out of the filter outlet into the test cavity.

[0009] In some embodiments, the filter valve seat is further provided with a second airflow channel, the air inlet of the device is located at the inlet of the second airflow channel, and the second airflow channel is connected to the filter channel of the filter.

[0010] In some embodiments, a powder metallurgy head is further included, which is disposed within the filter valve seat. The air inlet of the powder metallurgy head is located upstream of the second airflow channel, and the air outlet of the powder metallurgy head is located downstream of the second airflow channel. The powder metallurgy head is located upstream of the filter channel. By disposing of the powder metallurgy head within the second airflow channel, impurities in the airflow introduced through the device's air inlet are coarsely filtered.

[0011] In some embodiments, the filter includes a filter cartridge and a filter element, and the gap between the filter cartridge and the filter element forms the filtration channel. By setting the filtration channel, airflow flows within the set path and is filtered by the filter element to achieve the goal of filtering moisture and other impurities.

[0012] In some embodiments, the filter element is hollow, and the filter valve seat is provided with a filter cavity communicating with the filter element. The filter cavity is also communicating with the filter outlet channel. This allows airflow to enter the filter element cavity from the filter channel, be filtered again from the filter element cavity, enter the filter outlet, then enter the filter cavity provided on the filter valve seat, and finally enter the filter outlet channel from the filter cavity to reach the oxygen sensor measuring end.

[0013] In some embodiments, the measuring air inlet channel is disposed on the test housing, and the test cavity communicates with the measuring air inlet channel. This allows the filtered airflow to enter the test cavity from the measuring air inlet channel, where the oxygen sensor detects the oxygen content of the sample gas.

[0014] In some embodiments, the oxygen sensor has several heat dissipation holes at the end furthest from the test cavity. These heat dissipation holes accelerate the dissipation of heat generated by the sensor during detection and prevent high-temperature radiation.

[0015] In some embodiments, the test housing and the filter valve seat are respectively provided with a first sample gas discharge channel and a second sample gas discharge channel that communicate with each other. The first sample gas discharge channel communicates with the test cavity, and the end of the second sample gas discharge channel away from the first sample gas discharge channel passes through the side wall of the filter valve seat. This allows the tested sample gas to be discharged from the second sample gas discharge channel.

[0016] In some embodiments, the device further includes a housing connected to the end of the filter valve seat away from the device's air inlet. The oxygen sensor and filter are both located inside the housing. The housing includes a thermal insulation area and a heat dissipation area. The heat dissipation area is located at the end of the housing away from the device's air inlet and is composed of several through holes on the housing. By providing a thermal insulation area on the housing, the required ambient temperature for the oxygen sensor's detection end is ensured, and the heat dissipation area prevents excessively high internal temperatures, effectively avoiding interference from the external environment and ensuring stable device performance.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] 1. Install a filter to remove moisture and other impurities from the reflux furnace before measuring oxygen content, preventing these impurities from entering the oxygen sensor and ensuring the quality and lifespan of the oxygen sensor.

[0019] 2. A powder metallurgy head is installed in the second airflow channel to coarsely filter impurities in the airflow introduced from the device's air inlet.

[0020] 3. An insulation zone is provided on the outer casing to ensure the ambient temperature required for the oxygen sensor detection end, and a heat dissipation zone is provided on the outer casing to prevent the internal temperature from becoming too high, effectively avoiding interference from the external environment and ensuring stable device performance. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a structural diagram of the present utility model;

[0023] Figure 2 In this utility model Figure 1 The structure after removing the outer casing of the device;

[0024] Figure 3 This is a central sectional view of the present invention;

[0025] Figure 4 This is a side view of the present invention;

[0026] Figure 5 This utility model Figure 4 Cross-sectional view of AA.

[0027] The attached diagram shows the markings and corresponding component names:

[0028] The device includes: air inlet 1, test housing 2, filter valve seat 3, powder metallurgy head 31, filter outlet channel 32, second airflow channel 33, filter cavity 34, second sample gas discharge channel 35, oxygen sensor 4, sensor heat dissipation hole 41, measurement air inlet channel 42, filter channel 5, outer shell 6, test cavity 21, first sample gas discharge channel 22, filter cylinder 51, filter element 52, outer shell insulation area 61, and outer shell heat dissipation area 62. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0030] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0032] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components. Example

[0033] This embodiment provides an oxygen concentration measuring device with a filter, see [link to documentation]. Figures 1-5 The test assembly includes a housing 2, a filter, and an oxygen sensor 4. The housing 2 has a test cavity 21 and an air inlet 1. The filter inlet is connected to the air inlet 1. The measuring end of the oxygen sensor 4 is located within the test cavity 21, which is connected to the filter outlet via a first airflow channel. The filter removes moisture and other impurities from the reflux furnace, ensuring that the filtered airflow enters the first airflow channel from the filter outlet and then enters the measuring cavity. This prevents moisture and other impurities from entering the oxygen sensor 4, thus ensuring the quality and lifespan of the oxygen sensor 4.

[0034] See Figure 3 It also includes a filter valve seat 3. The first airflow channel includes a connected measurement inlet channel 42 and a filter outlet channel 32. The filter outlet channel 32 is disposed on the filter valve seat 3 and communicates with the outlet of the filter. The measurement inlet channel 42 communicates with the test cavity 21. By setting the measurement inlet channel 42 and the filter outlet channel 32, it is convenient to guide the airflow (sample gas) flowing out of the filter outlet into the test cavity 21.

[0035] See Figure 3 The filter valve seat 3 is also provided with a second airflow channel 33, and the air inlet 1 of the device is located at the inlet of the second airflow channel 33. The second airflow channel 33 is connected to the filter channel 5 of the filter.

[0036] See Figure 3 It also includes a powder metallurgy head 31, which is disposed within the filter valve seat 3. The air inlet of the powder metallurgy head 31 is located upstream of the second airflow channel 33, and the air outlet of the powder metallurgy head 31 is located downstream of the second airflow channel 33. The powder metallurgy head 31 is located upstream of the filter channel 5. By setting the powder metallurgy head 31 within the second airflow channel 33, it is used for coarse filtration of impurities in the airflow introduced through the device's air inlet 1.

[0037] See Figure 2 and Figure 3The filter includes filter cartridges 51 and 52, and the gap between filter cartridges 51 and 52 forms the filtration channel 5. By setting the filtration channel 5, airflow flows within the set path and is filtered through filter cartridge 52, achieving the goal of filtering water and other impurities.

[0038] See Figure 2 and Figure 3 The 52 filter element is hollow, and the filter valve seat 3 is provided with a filter cavity 34 communicating with the 52 filter element. The filter cavity 34 is connected to the filter outlet channel 32. This allows airflow to enter the inner cavity of the 52 filter element from the filter channel 5, be filtered again from the inner cavity of the 52 filter element, enter the filter outlet, then enter the filter cavity 34 provided on the filter valve seat 3, and finally enter the filter outlet channel 32 from the filter cavity 34 so as to reach the measuring end of the oxygen sensor 4.

[0039] See Figure 3 and Figure 5 The measuring air intake channel 42 is disposed on the test housing 2, and the test cavity 21 communicates with the measuring air intake channel 42. This allows the filtered airflow to enter the test cavity 21 from the measuring air intake channel 42, and the oxygen sensor 4 detects the oxygen content of the sample gas within the test cavity 21.

[0040] See Figure 3 The oxygen sensor 4 has several heat dissipation holes 41 at the end away from the test cavity. By setting the heat dissipation holes 41, the heat generated by the oxygen sensor 4 during detection is accelerated, and high-temperature radiation is prevented.

[0041] See Figure 1 and Figure 4 The device also includes a housing 6, which is connected to the end of the filter valve seat 3 furthest from the device's air inlet 1. The oxygen sensor 4 and the filter are both located inside the housing 6. The housing includes a thermal insulation area 61 and a heat dissipation area 62. The heat dissipation area 62 is located at the end of the housing furthest from the device's air inlet 1 and consists of several through holes. The thermal insulation area 61 ensures the required ambient temperature for the oxygen sensor 4's detection end, while the heat dissipation area 62 prevents excessive internal temperature, effectively avoiding interference from the external environment and ensuring stable device performance. The test housing 2 and the sensor, and the filter valve seat 3 and the filter, are all connected by a non-removable sealed connection, effectively preventing the influence of external interference factors. The test housing 2 and the filter valve seat 3 are connected by screws.

[0042] See Figure 5The test housing 2 and the filter valve seat 3 are respectively provided with a first sample gas discharge channel 22 and a second sample gas discharge channel 35. The first sample gas discharge channel 22 communicates with the test cavity 21, and the end of the second sample gas discharge channel 35 away from the first sample gas discharge channel 21 passes through the side wall of the filter valve seat 3. This allows the tested sample gas to be discharged from the second sample gas discharge channel 35.

[0043] During operation, an oxygen-containing gas flow (mixed gas) enters the second gas flow channel 33 of the filter valve seat 3 from the inlet 1. The gas flow first undergoes preliminary filtration and pretreatment through the powder metallurgy head 31. Then, the gas enters the filter channel 5 of the filter. Under the action of the filter elements 51 and 52, impurities are filtered out, and the filtered gas enters the filter outlet channel 32. The filtered gas then enters the test cavity 21 through the measurement inlet channel 42, and then enters the oxygen sensor 4. The oxygen sensor 4 measures the oxygen concentration in the gas, and the measurement data can be transmitted to external devices for display or processing via relevant lines (conventional techniques in the art). The heat generated during device operation is dissipated through the heat dissipation holes of the outer casing, ensuring that all components of the device operate in a suitable temperature environment, thereby ensuring the accuracy of the measurement and the stability of the device.

[0044] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oxygen concentration measuring device with a filter, characterized in that, include: A test housing, wherein a test cavity and a device air inlet are provided on the test housing; A filter, the inlet of which is connected to the air inlet of the device; An oxygen sensor, wherein the measuring end of the oxygen sensor is located inside the test cavity, and the test cavity is connected to the outlet of the filter through a first airflow channel.

2. The oxygen concentration measuring device with filter according to claim 1, characterized in that, It also includes a filter valve seat. The first airflow channel includes a connected measurement inlet channel and a filter outlet channel. The filter outlet channel is disposed on the filter valve seat and is connected to the outlet of the filter. The measurement inlet channel is connected to the test cavity.

3. The oxygen concentration measuring device with filter according to claim 2, characterized in that, The filter valve seat is also provided with a second airflow channel, and the air inlet of the device is located at the inlet of the second airflow channel. The second airflow channel is connected to the filter channel of the filter.

4. The oxygen concentration measuring device with filter according to claim 3, characterized in that, It also includes a powder metallurgy head, which is disposed in the filter valve seat. The air inlet of the powder metallurgy head is located upstream of the second airflow channel, and the air outlet of the powder metallurgy head is located downstream of the second airflow channel. The powder metallurgy head is located upstream of the filter channel.

5. The oxygen concentration measuring device with filter according to claim 3, characterized in that, The filter includes a filter cartridge and a filter element, and the gap between the filter cartridge and the filter element forms the filtration channel.

6. The oxygen concentration measuring device with filter according to claim 5, characterized in that, The filter element is hollow, and the filter valve seat is provided with a filter cavity that communicates with the filter element. The filter cavity is connected to the filter outlet channel.

7. The oxygen concentration measuring device with filter according to claim 5, characterized in that, The measurement air intake channel is disposed on the test housing, and the test cavity communicates with the measurement air intake channel.

8. The oxygen concentration measuring device with filter according to claim 7, characterized in that, The oxygen sensor has several heat dissipation holes at the end away from the test cavity.

9. The oxygen concentration measuring device with filter according to claim 7, characterized in that, The test housing and the filter valve seat are respectively provided with a first sample gas discharge channel and a second sample gas discharge channel. The first sample gas discharge channel is connected to the test cavity, and the end of the second sample gas discharge channel away from the first sample gas discharge channel passes through the side wall of the filter valve seat.

10. The oxygen concentration measuring device with filter according to any one of claims 2-9, characterized in that, It also includes a housing, which is connected to the end of the filter valve seat away from the air inlet of the device. The oxygen sensor and the filter are both located inside the housing. The housing includes a housing insulation area and a housing heat dissipation area. The housing heat dissipation area is located at the end of the housing away from the air inlet of the device and is composed of several through holes provided on the housing.

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