A demisting and heat dissipation module and camera

Abstract

The present invention relates to the field of waterproof detection technology, and discloses a demisting heat dissipation module and a camera. The demisting heat dissipation module comprises: a shell and a refrigerator; the refrigerator is located in the shell, the refrigerator has a cold end and a hot end, the shell is provided with a transparent window, and the hot end is thermally connected to the transparent window. In the above-mentioned demisting heat dissipation module, the refrigerator absorbs and conducts the heat near the cold end to the hot end, and then conducts it to the transparent window. On the one hand, the heat inside the shell is promptly dissipated through the transparent window. On the other hand, whether it is cold end refrigeration or external low temperature environment, it is easy to cause condensation on the transparent window to form water mist or frost. By heating the transparent window, the formation of the above-mentioned water mist or frost can be prevented in advance to affect the normal operation of the camera. Alternatively, when the temperature is too low, the hot end heats the transparent window to heat and melt the ice that has been formed. The above-mentioned structure can simultaneously use the refrigerator to dissipate heat inside the shell, and use the heat of the hot end of the refrigerator to de-ice or prevent ice formation.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof detection, and in particular to a demisting and heat dissipation module and a camera. Background Art

[0002] At present, thermal imaging cameras are mostly used in forest fire prevention, fishing ban projects and power monitoring. During long-term operation, a large amount of heat will be generated inside the thermal imaging camera, affecting its working performance. At the same time, the transparent window on the shell for light to pass through is easily affected by cold to form water mist or frost, affecting the image quality. Summary of the invention

[0003] The invention discloses a demisting and heat dissipation module and a camera, which are used to simultaneously alleviate the problems of insufficient heat dissipation and water mist and frost on a transparent window.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] In a first aspect, a demisting and heat dissipation module is provided, which comprises: a shell and a refrigerator; the refrigerator is located in the shell, the refrigerator has a cold end and a hot end, the shell is provided with a transparent window, and the hot end is thermally connected to the transparent window and the shell respectively.

[0006] In the above-mentioned defogger and heat dissipation module, the refrigerator absorbs the heat near the cold end and conducts it to the hot end, and then to the transparent window. On the one hand, the heat inside the shell is promptly dissipated through the transparent window. On the other hand, whether it is the cold end refrigeration or the external low temperature environment, it is easy to cause condensation on the transparent window to form water mist or frost. By heating the transparent window, the formation of the above-mentioned water mist or frost can be prevented in advance to affect the normal operation of the camera. Alternatively, when the temperature is too low, the hot end heats the transparent window to heat and melt the ice that has already formed; and the hot end is also thermally connected to the shell at the same time, so the shell can be used to fully dissipate heat. The above-mentioned structure can simultaneously use the refrigerator to dissipate heat inside the shell, and use the heat from the hot end of the refrigerator to defrost or prevent ice.

[0007] Optionally, the demisting and heat dissipation module further includes a humidity sensor, and the humidity sensor is fixed at the cold end of the refrigerator.

[0008] Optionally, the demisting and heat dissipation module also includes a fixing screw; the refrigerator includes a vertical portion extending along the inner wall of the shell, and the cold end is formed on the surface of the vertical portion facing away from the inner wall of the shell; the fixing screw sequentially passes through the humidity sensor and the vertical portion, and is fixed to the shell.

[0009] Optionally, the thickness of the transparent window is smaller than the thickness of the shell, so as to form a first step surface with the shell; the hot end forms a second step surface, and the second step surface is in corresponding contact with the first step surface.

[0010] Optionally, the refrigerator also includes a horizontal portion perpendicularly connected to the vertical portion; the second step surface includes a first surface, a second surface and a third surface, the first surface is a surface formed on the vertical portion away from the cold end, the second surface is a surface formed on the horizontal portion away from the cold end, and the third surface is a surface in the horizontal portion connecting the first surface and the second surface; wherein the first surface contacts a surface of the shell parallel to the transparent window, the second surface contacts the transparent window, and the third surface contacts a surface of the shell perpendicular to the transparent window.

[0011] Optionally, the shell further includes a vertical side wall perpendicular to the transparent window, and an end surface of the vertical portion away from the horizontal portion in the length direction is in contact with the vertical side wall.

[0012] Optionally, the defogger and heat dissipation module also includes a controller and an alarm; the controller is used to control the alarm to sound an alarm when the humidity sensor detects that the humidity change value of the cold end per unit time is greater than a preset value after the refrigerator is started for a set time.

[0013] Optionally, the controller is also used to start the refrigerator, the humidity sensor and the alarm at a scheduled time.

[0014] Optionally, the refrigerator is a semiconductor refrigerator.

[0015] Optionally, the shell includes a front cover, a middle tube and a rear cover which are fixedly connected in sequence along the axial direction, the transparent window is located on the front cover, and the refrigerator is fixed to a surface of the front cover facing the middle tube.

[0016] In a second aspect, a camera is provided, which may be a thermal imaging camera, comprising the defogger and heat dissipation module described in any of the above technical solutions.

[0017] Compared with the prior art, the camera has the same advantages as the defogger and heat dissipation module, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A stereoscopic diagram of a camera provided in an embodiment of the present application;

[0019] Figure 2 express Figure 1 Schematic diagram of the internal structure of the middle front cover;

[0020] Figure 3 express Figure 1 A cross-sectional view of the middle front cover portion;

[0021] Figure 4 express Figure 1 The workflow diagram of the camera is shown. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0023] Combination Figures 1 to 4 :

[0024] The demisting and heat dissipation module provided in the embodiment of the present application includes: a shell 5 and a refrigerator 3; the refrigerator 3 is located in the shell 5, the refrigerator 3 has a cold end S1 and a hot end S2, the shell 5 is provided with a transparent window 4, and the hot end S2 is thermally connected to the transparent window 4 and the shell 5 respectively.

[0025] In the above-mentioned defogger heat dissipation module, the refrigerator 3 absorbs and conducts the heat near the cold end S1 to the hot end S2, and then to the transparent window 4. On the one hand, the heat inside the shell 5 is promptly dissipated through the transparent window 4. On the other hand, whether it is the cold end S1 cooling or the external low temperature environment, it is easy to cause condensation on the transparent window 4 to form water mist or frost. By heating the transparent window 4, the formation of the above-mentioned water mist or frost can be prevented in advance to affect the normal operation of the camera. Or, when the temperature is too low, the hot end S2 heats the transparent window 4 to heat and melt the ice that has been formed. The above-mentioned structure can simultaneously use the refrigerator 3 to dissipate heat inside the shell 5, and use the heat of the hot end S2 of the refrigerator 3 to de-ice or prevent ice formation. The hot end S2 is also connected to the shell 5 for heat conduction. The shell 5 is specifically made of metal material with good heat dissipation effect. The refrigerator 3 absorbs and conducts the heat near the cold end S1 to the hot end S2, which can be quickly dissipated through the metal shell 5.

[0026] The transparent window 4 may be made of glass, and the hot end S2 is also thermally connected to the transparent window 4, and may be connected to the outer edge of the transparent window 4 to avoid blocking the line of sight of the transparent window 4. The cooler 3 may be a semiconductor cooler (TEC), which has high cooling efficiency and can be designed in a flexible shape, such as an L-shaped structure described later.

[0027] In a specific embodiment, the demisting and heat dissipation module further includes a humidity sensor 1, which is fixed to the cold end S1 of the refrigerator 3. As the cold end S1 is refrigerated, water vapor near the cold end S1 will condense and the humidity will increase. The humidity sensor 1 can monitor the humidity change near the cold end S1 at any time.

[0028] Specifically, the demisting heat dissipation module further includes a fixing screw 2; the refrigerator 3 includes a vertical portion 31 extending along the inner wall of the housing 5, and the cold end S1 is formed on the surface of the vertical portion 31 away from the inner wall of the housing 5; the fixing screw 2 sequentially penetrates the humidity sensor 1 and the vertical portion 31, and is fixed to the housing 5. The fixing screw 2 fixes the humidity sensor 1 and the vertical portion 31 at one time, simplifying the assembly process. And the space surrounded by the housing 5 is fully utilized.

[0029] In a specific embodiment, the thickness of the transparent window 4 is less than the thickness of the shell 5 to form a first step surface with the shell 5. Specifically, the edge of the transparent window 4 can be embedded in the groove of the inner wall of the hollow structure of the shell 5, and, on the inner side of the shell 5, the transparent window 4 is concave relative to the shell; the hot end S2 forms a second step surface, and the second step surface is in contact with the first step surface. The contact surface refers to the bold black line M. The cooperation between the first step surface and the second step surface increases the total contact area between the refrigerator 3 and the shell and the transparent window 4, which is convenient for heat exchange and timely dissipating heat from the hot end S2.

[0030] There are many ways to form the first step surface and the second step surface, as long as the contact area can be increased. For example, a protrusion can be formed on the surface of one of the shell 5 and the hot end S2, and another way is to form a groove that cooperates with the above-mentioned protrusion, which can also increase heat dissipation. In another specific embodiment, the refrigerator 3 also includes a horizontal portion 32 vertically connected to the vertical portion 31 to form an L-shaped structure; the second step surface includes a first surface S21, a second surface S22 and a third surface S23, the first surface S21 is a surface formed on the vertical portion 31 away from the cold end S1, the second surface S22 is a surface formed on the horizontal portion 32 away from the cold end S1, and the third surface S23 is a surface in the horizontal portion 32 connecting the first surface S21 and the second surface S22; wherein the first surface S21 contacts the surface of the shell 5 parallel to the transparent window 4, the second surface S22 contacts the transparent window 4, and the third surface S23 contacts the surface of the shell 5 perpendicular to the transparent window 4. The L-shaped structure of the refrigerator 3 is easy to process and forms a second step surface that increases the heat dissipation area, as well as a flat surface cold end S1 that is convenient for installing the humidity sensor 1. In addition, the horizontal portion 32 is installed at the angle formed by the transparent window 4 and the inner wall of the hollow structure of the housing 5, so that the edge of the transparent window 4 can be reinforced by the horizontal portion 32 to prevent the transparent window 4 from falling off or the edge from breaking.

[0031] In a specific embodiment, the shell 5 also includes a vertical side wall 511 perpendicular to the transparent window 4. The end surface S3 of the vertical portion 31 away from the horizontal portion 32 in the length direction contacts the vertical side wall 511, so that the two are abutted to prevent the refrigerator 3 from deflecting relative to the shell 5, thereby stabilizing the refrigerator 3 to a certain extent.

[0032] In a specific embodiment, the housing 5 includes a front cover 51, a middle tube 52 and a rear cover 53 which are fixedly connected in sequence along the axial direction to form a waterproof and enclosed space, the transparent window 4 is located on the front cover 51, the refrigerator 3 is fixed on the surface of the front cover 51 facing the middle tube 52, and the front cover 51 is detachable, so it is also convenient to disassemble or install the humidity sensor 1 and the refrigerator 3. The imaging lens in the camera views through the transparent window 4, and the hot end S2 de-icing the transparent window 4 can prevent the image quality from being affected.

[0033] During operation, the camera will inevitably fail to be waterproof due to factors such as aging of its own materials, fatigue of connecting fasteners, and loosening due to vibration.

[0034] Thermal imaging cameras are expensive, and a certain proportion of them are damaged and expensive to repair due to water ingress, resulting in huge property losses. There is a lack of effective means to detect the waterproof performance of cameras installed outdoors. A humidity sensor is installed inside the device to detect whether the device has been flooded. At this time, the device has been flooded and cannot provide early warning, which cannot achieve the purpose of timely maintenance and avoiding losses. In normal weather such as sunny weather, the moisture content inside the camera is close to the ambient moisture content, and it is difficult for the humidity sensor to detect the failure of the device's waterproofing in time; when the external ambient temperature and moisture content are high in rainy weather, and more external water vapor enters the camera, although the humidity sensor detects abnormal humidity, the water vapor inside the camera can easily damage the internal components of the camera, and the equipment is difficult to maintain in rainy weather.

[0035] In a specific embodiment, the defogger and heat dissipation module also includes a controller and an alarm; the refrigerator 3 and the humidity sensor 1 are located in the shell 5; the controller is used to control the alarm to sound an alarm when the humidity sensor 1 detects that the humidity change value A1 of the cold end S1 per unit time is greater than the preset value A after the refrigerator 3 is started for a set time t, wherein the alarm can be a sound alarm, a vibration alarm, or an alarm that uses a picture displayed on a display screen as an alarm signal.

[0036] When the waterproof performance of the shell 5 is good, the amount of gas interaction between the inside and outside of the shell 5 is very small, and the water vapor mainly comes from the gas carried by the internal space of the shell 5 itself. After the refrigerator 3 is started for a set time t, the condensed water humidity change value A1 per unit time is much smaller than the preset value A (also called the humidity change threshold), and the alarm will not sound an alarm; when the waterproof performance of the shell 5 is greatly reduced or even fails, the internal temperature of the shell 5 is much higher than the ambient gas, and convection occurs between the inside and outside of the shell 5, and the amount of interaction is greatly increased. The moisture in the shell 5 condenses at the cold end S1 of the refrigerator 3, and the convective air continues to condense near the humidity sensor 1, and the humidity increases; when the condensed water humidity change value A1 per unit time is greater than the preset value A, the alarm sounds, reminding the staff to promptly maintain the waterproof failure product.

[0037] This solution sets different waterproof performance inspection standards by adjusting the humidity sensor parameters. The internal and external gas circulation channels are formed due to the aging of the material itself and the fatigue or vibration loosening of the connecting fasteners, which provides the possibility for condensed water to detect the waterproof performance. Even in clear weather conditions, due to the continuous gas exchange inside and outside the shell 5, waterproof performance failure detection can be performed. In a specific embodiment, the controller is also used to time the start of the refrigerator 3, the humidity sensor 1 and the alarm, so that the defog heat dissipation module can regularly self-check whether the waterproof performance is good, eliminating the tediousness of frequent manual inspections. After the refrigerator 3 is started, the fan can also be used to blow the cold end S1 to assist in the heat dissipation of the device.

[0038] By utilizing the above-mentioned defogger and heat dissipation module, it is possible to simultaneously achieve heat dissipation of the space within the shell 5, demisting or deicing the transparent window 4, and detecting the water tightness of the space enclosed by the shell 5. In addition, it is convenient to install and fix the refrigerator 3 and the humidity sensor 1 to the shell 5 at one time, thereby saving the internal space of the shell 5.

[0039] Based on the same inventive concept, an embodiment of the present application further provides a camera, which may be a thermal imaging camera, comprising the defogger and heat dissipation module provided in the above embodiment.

[0040] Among them, the refrigerator 3 absorbs the heat near the cold end S1 and conducts it to the hot end S2, and then to the transparent window 4. On the one hand, the heat inside the shell 5 is promptly dissipated through the transparent window 4. On the other hand, whether it is the refrigeration of the cold end S1 or the external low temperature environment, it is easy to cause condensation on the transparent window 4 to form water mist or frost. By heating the transparent window 4, the formation of the above-mentioned water mist or frost can be prevented in advance to affect the normal operation of the camera. Alternatively, when the temperature is too low, the hot end S2 heats the transparent window 4 to heat and melt the ice that has already formed. The above structure can simultaneously use the refrigerator 3 to dissipate heat inside the shell 5, and use the heat of the hot end S2 of the refrigerator 3 to defrost or prevent ice.

[0041] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A demisting and heat dissipation module, characterized in that: include: Housing and cooler; The refrigerator is located in the shell, and has a cold end and a hot end. The shell is provided with a transparent window, and the hot end is thermally connected to the transparent window and the shell respectively. The thickness of the transparent window is smaller than the thickness of the shell, so as to form a first step surface with the shell; The refrigerator is an L-shaped structure, the hot end forms a second step surface, and the second step surface is in contact with the first step surface.

2. The demisting and heat dissipation module according to claim 1, characterized in that: The demisting and heat dissipation module also includes a humidity sensor, and the humidity sensor is fixed to the cold end of the refrigerator.

3. The demisting and heat dissipation module according to claim 2, characterized in that: The demisting and heat dissipation module also includes fixing screws; The refrigerator comprises a vertical portion extending along the inner wall of the shell, and the cold end is formed on a surface of the vertical portion facing away from the inner wall of the shell; The fixing screw passes through the humidity sensor and the vertical portion in sequence and is fixed to the housing.

4. The demisting and heat dissipation module according to claim 3, characterized in that: The refrigerator further includes a horizontal portion vertically connected to the vertical portion; The second step surface includes a first surface, a second surface and a third surface, wherein the first surface is a surface formed on the vertical portion away from the cold end, the second surface is a surface formed on the horizontal portion away from the cold end, and the third surface is a surface in the horizontal portion connecting the first surface and the second surface; The first surface contacts a surface of the shell parallel to the transparent window, the second surface contacts the transparent window, and the third surface contacts a surface of the shell perpendicular to the transparent window.

5. The demisting and heat dissipation module according to claim 4, characterized in that: The housing further comprises a vertical side wall perpendicular to the transparent window, and an end surface of the vertical portion away from the horizontal portion in the length direction contacts the vertical side wall.

6. The demisting and heat dissipation module according to claim 2, characterized in that: The demisting and heat dissipation module also includes a controller and an alarm; The controller is used to control the alarm to sound an alarm when the humidity sensor detects that the humidity change value of the cold end within a unit time is greater than a preset value after the refrigerator is started for a set time.

7. The demisting and heat dissipation module according to claim 6, characterized in that: The controller is also used to start the refrigerator, the humidity sensor and the alarm at a fixed time.

8. The demisting and heat dissipation module according to claim 1, characterized in that: The refrigerator is a semiconductor refrigerator.

9. The demisting and heat dissipation module according to any one of claims 1 to 8, characterized in that: The shell comprises a front cover, a middle tube and a rear cover which are fixedly connected in sequence along the axial direction, the transparent window is located on the front cover, and the refrigerator is fixed on the surface of the front cover facing the middle tube.

10. A camera, characterized in that: It comprises the demisting and heat dissipation module as described in any one of claims 1 to 9.

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