Anti-fog instrument
By introducing a heating plate and air circulation system into the instrument, combined with a desiccant filter frame, the problem of fogging in the instrument under temperature difference conditions is solved, achieving an anti-fog effect and ensuring that the dial is clearly visible.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-22
- Publication Date
- 2026-04-07
AI Technical Summary
Instruments are prone to fogging in environments with temperature differences, which can affect the readings of the dial and hands.
It employs a heating plate and an air circulation system. The heating plate heats the air in the enclosed space, and the fan and air pipes form an air circulation system. Combined with a desiccant filter frame, it absorbs water vapor and prevents water vapor from condensing into fog.
It effectively prevents water mist formation on the inside of the instrument's transparent panel, ensuring clear visibility of the dial readings and improving the instrument's reliability.
Smart Images
Figure CN121804552A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of instruments, and in particular to an anti-fog instrument. Background Technology
[0002] Instruments are a general term for instruments that display numerical values, including pressure gauges, flow meters, and various analytical instruments. As is well known, the saturation of water vapor in the air increases with rising air temperature. When warm, humid air encounters a cooler object, a region forms around it. Air entering this region experiences a rapid temperature drop, causing a significant decrease in the water vapor saturation. This leads to supersaturation of water vapor in the air, which then precipitates and adheres to the object, resulting in condensation. Therefore, in environments with large temperature differences or during seasons with significant temperature variations, fogging may occur on the instrument's viewing window, affecting the reading of the dial and needles. Summary of the Invention
[0003] The purpose of this invention is to provide an anti-fog instrument that can prevent fogging and avoid affecting the reading of the dial needles.
[0004] The objective of this invention is achieved through the following technical solution:
[0005] An anti-fog instrument includes a mounting base plate on which multiple indicator needles are mounted, a surrounding plate fixed around the perimeter of the mounting base plate, a transparent plate sealed inside the surrounding plate to seal the indicator needles, and a heating plate disposed on the mounting base plate.
[0006] The mounting base plate extends rearward with two air pipes, the rear ends of which are connected to a channel pipe. A fan rotates inside one of the air pipes, and a micro motor is installed on the channel pipe.
[0007] Both air tubes are located in the middle of the mounting base plate, and the two air tubes are located at the top and bottom ends respectively.
[0008] An installation sleeve is fixed inside the air pipe where the fan is located, and the heating plate is axially fixed inside the installation sleeve.
[0009] Multiple heating plates are installed side by side inside the mounting sleeve.
[0010] The channel tube is equipped with a filter frame containing a desiccant.
[0011] A connecting pipe extends rearward from the middle of the mounting base plate and is inserted into the channel pipe. A rectangular tube extends forward from the middle of the mounting base plate and penetrates the transparent plate. A slide frame slides inside the connecting pipe, and the filter frame is fixed to the inner end of the slide frame.
[0012] The carriage has two symmetrically rotating locking plates, each with a ramp edge I on its outer side and two ramp edges II symmetrically arranged inside the rectangular tube.
[0013] A spring is installed between the two locking plates.
[0014] The outer end of the rectangular tube is fastened with an end cap. Attached Figure Description
[0015] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of the anti-fog instrument;
[0016] Figure 3 This is a partial structural diagram of the anti-fog instrument;
[0017] Figure 4 This is a cross-sectional structural diagram of the anti-fog instrument;
[0018] Figure 5 This is a structural diagram of the mounting base plate;
[0019] Figure 6 This is a cross-sectional view of the mounting base plate.
[0020] Figure 7 This is a schematic diagram of the channel tube structure;
[0021] Figure 8 This is a schematic diagram of the fan structure;
[0022] Figure 9 This is a schematic diagram of the heating plate structure;
[0023] Figure 10 This is a structural diagram of the carriage;
[0024] Figure 11 This is a structural diagram of the locking plate;
[0025] Figure 12 This is a schematic diagram of the end cap structure.
[0026] In the picture:
[0027] Mounting base plate 101; enclosure plate 102; air pipe 103; rectangular tube 104; ramp rib II 105; connecting pipe 106; channel pipe 107; transparent plate 108; end cap 109.
[0028] Fan 201; Miniature motor 202;
[0029] Mounting sleeve 301; heating plate 302;
[0030] Carriage 401; Filter frame 402;
[0031] Locking plate 501; spring 502; ramp edge I 503. Detailed Implementation
[0032] like Figure 1-12 As shown:
[0033] An anti-fog instrument includes a mounting base plate 101, a surrounding plate 102, a transparent plate 108, and a heating plate 302. The mounting base plate 101 is equipped with a plurality of indicator needles. The surrounding plate 102 is fixed around the perimeter of the mounting base plate 101. The transparent plate 108 is sealed inside the surrounding plate 102 and seals the space where the indicator needles are located. The heating plate 302 is disposed on the mounting base plate 101.
[0034] In use, the mounting base 101 is installed on the equipment to form an anti-fog instrument. The transparency of the transparent plate 108 facilitates observation of the positions of multiple indicator needles. Simultaneously, the transparent plate 108 is sealed and fixed to the surrounding plate 102, creating a closed space for the multiple indicator needles. Fogging is mostly caused by temperature differences. When the external temperature is low and the air temperature inside the closed space is high, the transparent plate 108 will maintain the same temperature as the outside due to the smaller air volume. Consequently, water vapor in the air inside the closed space will condense upon contact with the transparent plate 108, forming small water droplets on the inside of the transparent plate 108, which then forms water mist, affecting instrument observation. By energizing the heating plate 302, the air inside the closed space is heated, raising its temperature. This increased air temperature will eventually raise the temperature of the transparent plate 108, preventing the water vapor in the closed space from pre-cooling and condensing into water droplets, thus effectively avoiding fogging inside the instrument.
[0035] like Figure 1-12 As shown:
[0036] The mounting base plate 101 extends rearward with two air pipes 103. A channel pipe 107 is connected and fixed to the rear end of the two air pipes 103. A fan 201 rotates inside one of the air pipes 103. A micro motor 202 is mounted on the channel pipe 107.
[0037] When the heating plate 302 is energized and heated, the micro motor 202 is simultaneously activated. The micro motor 202 will drive the fan 201 to rotate in the air pipe 103, thereby blowing the air in the air pipe 103 into the sealed space. After the air in the sealed space increases, it will naturally flow out from another air pipe 103 and then enter the channel pipe 107. The air in the channel pipe 107 will automatically flow into the air pipe 103 where the fan 201 is located, thus forming a rapid air circulation. Combined with the energization and heating of the heating plate 302, the air in the sealed space is rapidly heated, which in turn heats up the transparent plate 108, quickly completing the anti-fogging of the instrument.
[0038] like Figure 1-12 As shown:
[0039] Both air pipes 103 are located in the middle of the mounting base plate 101, and the two air pipes 103 are located at the upper and lower ends respectively.
[0040] By positioning the two air tubes 103, the space occupied by the indicator panel can be minimized, and the air in the enclosed space can be circulated as comprehensively as possible, thereby improving the heating efficiency.
[0041] like Figure 1-12 As shown:
[0042] The mounting sleeve 301 is fixed inside the air pipe 103 where the fan 201 is located, and the heating plate 302 is axially fixed inside the mounting sleeve 301.
[0043] By placing the heating plate 302 inside the air duct 103 where the fan 201 is located, the air driven by the fan can come into contact with the heating plate 302 before flowing out of the air duct 103. The heated air then flows out of the air duct 103 and into the sealed space, thereby further increasing the heating rate of the transparent plate 108 and thus improving the instrument's anti-fogging efficiency.
[0044] Further:
[0045] Multiple heating plates 302 are installed side by side inside the mounting sleeve 301.
[0046] By installing multiple heating plates 302 side by side inside the mounting sleeve 301, the air flows through the gap between two adjacent heating plates 302 when passing through the mounting sleeve 301. This allows the heating plates 302 to heat the air more effectively, further increasing the rate of air temperature rise and improving the instrument's anti-fogging efficiency.
[0047] like Figure 1-12 As shown:
[0048] The filter frame 402 is installed inside the channel tube 107, and the filter frame 402 is filled with a desiccant.
[0049] By using a filter frame 402 containing a desiccant, water vapor in the air can be absorbed during air circulation, thereby reducing the water vapor content in the air and fundamentally preventing the instrument from fogging. The desiccant can be activated carbon or other commonly available breathable materials.
[0050] like Figure 1-12 As shown:
[0051] A connecting pipe 106 extends rearward from the middle of the mounting base plate 101. The connecting pipe 106 is inserted into the channel pipe 107. A rectangular pipe 104 extends forward from the middle of the mounting base plate 101. The rectangular pipe 104 penetrates the transparent plate 108. The slide 401 slides in the connecting pipe 106. The filter frame 402 is fixed to the inner end of the slide 401.
[0052] By using the connecting pipe 106 and the rectangular pipe 104, the slide 401 can be pulled at the rectangular pipe 104, causing the slide 401 to drive the filter frame 402 out of the channel pipe 107, thereby replacing the desiccant. After replacement, the filter frame 402 containing new desiccant can be inserted back into the channel pipe 107 for drying, ensuring the absorption of moisture in the sealed space.
[0053] Meanwhile, the carriage 401 and the connecting pipe 106 are slidably connected, and a sealing ring is provided between them, which effectively prevents external air from entering the channel pipe 107 through the connecting pipe 106;
[0054] Furthermore, by passing through the transparent plate 108 through the rectangular tube 104, air inside the rectangular tube 104 is prevented from entering the sealed space. Also, the rectangular shape of the rectangular tube 104 creates a gap between the rectangular tube 104 and the slide 401, making it easy to pick up the slide 401 with your fingers and insert or remove it.
[0055] like Figure 1-12 As shown:
[0056] Two locking plates 501 rotate symmetrically within the carriage 401, and two ramp edges I 503 are respectively arranged on the outer side of the two locking plates 501. Two ramp edges II 105 are symmetrically arranged inside the rectangular tube 104.
[0057] After the filter frame 402 is inserted into the channel tube 107, the two locking plates 501 inside the carriage 401 are simultaneously located inside the rectangular tube 104. At this time, the two locking plates 501 are pushed towards the inner wall of the rectangular tube 104, so that the two ramp edges I 503 are inserted into the two ramp edges II 105, and the two ramp edges I 503 are respectively locked on the two ramp edges II 105, thereby fixing the carriage 401 and ensuring that the filter frame 402 will not slide out of the channel tube 107.
[0058] like Figure 1-12 As shown:
[0059] Spring 502 is positioned between the two locking plates 501.
[0060] The spring force of the spring 502 pushes the two locking plates 501 to rotate towards the inner wall of the rectangular tube 104. When the locking plates 501 are pushed towards the inner wall of the rectangular tube 104, the two locking plates 501 will be automatically driven by the spring force of the spring 502 to insert the two ramp ribs I 503 into the two ramp ribs II 105, so that the two ramp ribs I 503 are respectively locked on the two ramp ribs II 105, thereby fixing the slide 401. When the filter frame 402 is removed, the two locking plates 501 are squeezed to overcome the spring force of the spring 502 and rotate, so that the two ramp ribs I 503 are separated from the two ramp ribs II 105, and the slide 401 can be pulled out.
[0061] like Figure 1-12 As shown:
[0062] An end cap 109 is fastened to the outer end of the rectangular tube 104.
[0063] By sealing the outer end of the rectangular tube 104 with the end cap 109, the instrument is kept clean and aesthetically pleasing while preventing dust from entering the rectangular tube 104.
Claims
1. An anti-fog instrument, characterized in that: Including a mounting base plate (101) with multiple indicator pins installed, and A surrounding panel (102) fixed around the mounting base plate (101), a transparent plate (108) sealed inside the surrounding panel (102) to seal the indicator needle, and a heating plate (302) provided on the mounting base plate (101).
2. The anti-fog instrument according to claim 1, characterized in that: The mounting base plate (101) extends rearward with two air pipes (103), and the rear ends of the two air pipes (103) are connected to a channel pipe (107). A fan (201) rotates inside one of the air pipes (103), and a micro motor (202) is installed on the channel pipe (107).
3. The anti-fog instrument according to claim 2, characterized in that: Both air tubes (103) are located in the middle of the mounting base plate (101), and the two air tubes (103) are located at the upper and lower ends respectively.
4. The anti-fog instrument according to claim 3, characterized in that: An installation sleeve (301) is fixed inside the air pipe (103) where the fan (201) is located, and the heating plate (302) is axially fixed inside the installation sleeve (301).
5. The anti-fog instrument according to claim 4, characterized in that: Multiple heating plates (302) are installed side by side inside the mounting sleeve (301).
6. The anti-fog instrument according to claim 2, characterized in that: The channel tube (107) is equipped with a filter frame (402) containing a desiccant.
7. An anti-fog instrument according to claim 6, characterized in that: A connecting pipe (106) extends rearward from the middle of the mounting base plate (101), and the connecting pipe (106) is inserted into the channel pipe (107). A rectangular pipe (104) extends forward from the middle of the mounting base plate (101), and the rectangular pipe (104) penetrates the transparent plate (108). A slide (401) slides inside the connecting pipe (106), and a filter frame (402) is fixed to the inner end of the slide (401).
8. An anti-fog instrument according to claim 7, characterized in that: The slide (401) has two locking plates (501) that rotate symmetrically inside. Both locking plates (501) have a ramp I (503) on their outer sides. The rectangular tube (104) has two ramp II (105) that rotate symmetrically inside.
9. An anti-fog instrument according to claim 8, characterized in that: A spring (502) is provided between the two locking plates (501).
10. An anti-fog instrument according to claim 9, characterized in that: The outer end of the rectangular tube (104) is fastened with an end cap (109).