Dew-point instrument
By wrapping the thermal insulation film layer outside the bottom cylinder of the dew point meter and the second thermal insulation film layer outside the glass tube, and combining the insulation block, the problem of dry ice energy transmission to air in the prior art is solved, and the utilization rate and testing accuracy of dry ice are improved.
Patent Information
- Application Number
- CN202421212377.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the existing dry ice dew point meter, the side wall of the bottom cylinder of the copper groove contacts the air, causing the energy of the dry ice to be sublimated into the air, reducing the utilization rate of dry ice.
The first insulation film layer is wrapped outside the bottom cylinder of the dew point meter, and optionally the second insulation film layer is wrapped outside the glass tube, combining multiple insulation blocks to reduce the conduction of energy to the air and improve the utilization rate of dry ice.
Through the design of the thermal insulation film layer and insulation block, energy transmission to air is reduced, the utilization rate of dry ice is improved, more energy is transferred to the surface of the hollow glass, and the testing accuracy and efficiency are improved.
Smart Images
Figure CN223154912U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of measuring instruments, and particularly relates to a dew point meter. Background Art
[0002] National standards have different dew point requirements for insulating glass of different thicknesses. For example, the dew point requirement for 5-mm-thick insulating glass is equal to or lower than -60°C, and the contact time for insulating glass of different thicknesses is not the same. In order to detect the actual dew point of insulating glass, a dew point meter is therefore required. There are many types of dew point meters, among which the dew point meter using the dry ice method is the most widely used. This kind of dew point meter includes a test tube, a probe, and a display. The test tube includes a glass tube and a copper groove. The two ends of the glass tube are open. The copper groove closes one end of the glass tube. The copper groove contacts the insulating glass to be tested to conduct the low temperature in the glass tube to the surface of the insulating glass to be tested. The probe extends into the test tube. The probe is electrically connected to the display. The probe measures the dew point temperature of the insulating glass and is displayed by the display.
[0003] The existing copper groove includes an embedding cylinder and a bottom cylinder. The two ends of the embedding cylinder are open. One end of the bottom cylinder is open, and the other end of the bottom cylinder is closed. One end of the embedding cylinder is connected to the open end of the bottom cylinder. The embedding cylinder is embedded in the glass tube. The closed end of the bottom cylinder contacts the insulating glass to be tested.
[0004] For the existing dew point meter using the dry ice method, the side wall of the bottom cylinder of the copper groove also contacts the air. During the test, part of the energy formed by the sublimation of dry ice is conducted to the air, resulting in low utilization rate of dry ice. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is: aiming at the problem that for the existing dew point meter using the dry ice method, the side wall of the bottom cylinder of the copper groove also contacts the air, and during the test, part of the energy formed by the sublimation of dry ice is conducted to the air, resulting in low utilization rate of dry ice, a dew point meter is provided.
[0006] To solve the above technical problem, an embodiment of the utility model provides a dew point meter,
[0007] including a first heat insulation film layer, a test tube, a probe, and a display;
[0008] The test tube includes a copper groove and a glass tube. The two ends of the glass tube are open;
[0009] The copper groove includes an embedding cylinder and a bottom cylinder. The two ends of the embedding cylinder are open. One end of the bottom cylinder is open, and the other end of the bottom cylinder is closed. One end of the embedding cylinder is connected to the open end of the bottom cylinder. The other end of the embedding cylinder is embedded in the glass tube;
[0010] The first heat insulation film layer is in a cylindrical shape. The first heat insulation film layer is sleeved on the bottom cylinder to wrap the side wall of the bottom cylinder;
[0011] The probe extends into the glass tube, and the probe is electrically connected to the display.
[0012] Optionally, a second heat insulation film layer is further included. The second heat insulation film layer is cylindrical, and the second heat insulation film layer is sleeved on the glass tube to wrap the side wall of the glass tube.
[0013] Optionally, the second heat insulation film layer and the first heat insulation film layer are arranged along the axial direction of the glass tube, and the opposite ends of the second heat insulation film layer and the first heat insulation film layer are connected.
[0014] Optionally, the thickness of the first heat insulation film layer is 0.5 - 1.5 mm, and the thickness of the second heat insulation film layer is 0.5 - 1.5 mm.
[0015] Optionally, a plurality of heat preservation blocks are further included. Each heat preservation block is provided with a through hole. A part of the heat preservation blocks are sleeved on the first heat insulation film layer through the through holes, and the remaining heat preservation blocks are sleeved on the second heat insulation film layer through the through holes. The plurality of heat preservation blocks are arranged along the axial direction of the glass tube.
[0016] Optionally, along the axial direction of the glass tube, the closed end of the bottom cylinder protrudes from the adjacent heat preservation block, and the end face of the closed end of the bottom cylinder and the surface of the adjacent heat preservation block are spaced apart.
[0017] Optionally, along the axial direction of the glass tube, the interval between the end face of the closed end of the bottom cylinder and the surface of the adjacent heat preservation block is 1 - 5 mm.
[0018] Optionally, the orthographic projection of the glass tube on the end face of the closed end of the bottom cylinder coincides with the orthographic projection of the side wall of the bottom cylinder on the end face of the closed end of the bottom cylinder.
[0019] Optionally, the heat preservation block is a regular polyhedron.
[0020] Optionally, the axis of the through hole passes through the geometric midpoint of the heat preservation block.
[0021] According to a dew point meter of an embodiment of the present invention, during the sublimation process of dry ice in the glass tube, the first heat insulation film layer insulates the bottom cylinder, reduces the contact with air, and the low temperature is conducted towards the insulating glass as much as possible, reducing the conduction of low temperature from the bottom cylinder to the air, thereby improving the utilization rate of dry ice. Description of the Drawings
[0022] Figure 1 It is a schematic cross-sectional structure diagram of a transparent tube and a copper groove of a dew point meter provided by an embodiment of the present invention;
[0023] Figure 2 Explosion schematic diagram of the transparent tube and copper groove of the dew point meter provided by an embodiment of the present utility model.
[0024] The reference numerals in the specification are as follows: 1, copper groove; 11, bottom cylinder; 12, embedding cylinder; 2, glass tube; 31, first heat insulation film layer; 32, second heat insulation film layer; 4, heat preservation block; 41, through hole. Specific embodiments
[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a dew point meter, including a first heat insulation film layer 31, a test tube, a probe and a display; the test tube includes a copper groove 1 and a glass tube 2, and both ends of the glass tube 2 are open; the copper groove 1 includes an embedding cylinder 12 and a bottom cylinder 11, both ends of the embedding cylinder 12 are open, one end of the bottom cylinder 11 is open, and the other end of the bottom cylinder 11 is closed; one end of the embedding cylinder 12 is connected to the open end of the bottom cylinder 11, and the other end of the embedding cylinder 12 is embedded in the glass tube 2. The probe extends into the glass tube 2, and the probe is electrically connected to the display.
[0027] Among them, the test tube, the probe and the display are prior arts, and generally dew point meters basically have a test tube, a probe and a display. However, the first heat insulation film layer 31 in this embodiment is cylindrical, and the first heat insulation film layer 31 is sleeved on the bottom cylinder 11 to wrap the side wall of the bottom cylinder 11, which is not a prior art. In this embodiment, the heat insulation film is wound around the exposed side wall of the bottom cylinder 11, thereby increasing the heat insulation effect of the bottom cylinder 11 and reducing the energy transferred from the copper groove 1 to the air, so that more energy is transferred from the end face of the closed end of the bottom cylinder 11 to the insulating glass.
[0028] As an example, the dew point meter further includes a second heat insulation film layer 32, the second heat insulation film layer 32 is cylindrical, and the second heat insulation film layer 32 is sleeved on the glass tube 2 to wrap the side wall of the glass tube 2. More specifically, the second heat insulation film layer 32 and the first heat insulation film layer 31 are connected.
[0029] The first heat insulation film layer 31 and the second heat insulation film layer 32 in this embodiment are integrally formed. In practical applications, generally, a plastic film is wound around the side wall of the test tube, that is, the plastic film is wound around the side wall of the transparent tube and the side wall of the bottom cylinder 11 at the same time to form.
[0030] The plastic film can be wound in multiple layers simultaneously, such that the thickness of the first heat-insulating film layer 31 is 0.5 - 1.5 mm, and the thickness of the second heat-insulating film layer 32 is 0.5 - 1.5 mm. In this embodiment, the thicknesses of both the first heat-insulating film layer and the second heat-insulating film layer are 1 mm. In some embodiments, the thickness of the first heat-insulating film layer is one of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm. The thickness of the second heat-insulating film layer is one of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm.
[0031] As an example, the dew point meter further includes a plurality of heat-insulating blocks 4. Each heat-insulating block 4 is provided with a through hole 41. A part of the heat-insulating blocks 4 is sleeved on the first heat-insulating film layer 31 through the through hole 41, and the remaining heat-insulating blocks 4 are sleeved on the second heat-insulating film layer 32 through the through hole 41. The plurality of heat-insulating blocks 4 are arranged along the axial direction of the glass tube 2.
[0032] In this embodiment, the heat-insulating block 4 is made of an extruded foam board or other foam materials. Since the foam materials have better heat-insulating performance, further heat insulation is achieved on the basis of the first heat-insulating film layer 31 and the second heat-insulating film layer 32. Moreover, in this embodiment, the heat-insulating block 4 is directly sleeved outside the test tube wrapped with the plastic film through the through hole 41, which has the advantage of simple installation method. And a wire thermal cutter is used to cut the heat-insulating block 4, thereby manufacturing the through hole 41 penetrating the heat-insulating block 4, and the manufacturing process is simpler and the cost is low.
[0033] As an example, in the axial direction of the glass tube 2, the closed end of the bottom cylinder 11 protrudes from the adjacent heat-insulating block 4, and the end face of the closed end of the bottom cylinder 11 and the surface of the adjacent heat-insulating block 4 are spaced apart. In this embodiment, the plurality of heat-insulating blocks 4 are arranged along the axial direction of the glass tube 2. The plurality of heat-insulating blocks 4 can be spaced apart or closely arranged, and the facing surfaces of two adjacent heat-insulating blocks 4 are in contact with each other. The surface of the heat-insulating block 4 located at both ends in the arrangement direction and closest to the closed end of the bottom cylinder 11 is called the a surface, and the end face of the closed end is called the b surface. The a surface and the b surface are parallel, the a surface and the b surface are spaced apart, and the b surface is located on the side of the a surface away from the open end of the bottom cylinder 11.
[0034] As an example, in the axial direction of the glass tube 2, the interval between the end face of the closed end of the bottom cylinder 11 and the surface of the adjacent heat-insulating block 4 is 1 - 5 mm. Preferably, the interval between the end face of the closed end of the bottom cylinder 11 and the surface of the adjacent heat-insulating block 4 is 3 mm. This interval ensures that the contact between the bottom of the copper groove 1 and the surface of the insulating glass is not affected.
[0035] As an example, the orthographic projection of the glass tube 2 on the end face of the closed end of the bottom cylinder 11 coincides with the orthographic projection of the side wall of the bottom cylinder 11 on the end face of the closed end of the bottom cylinder 11. In this embodiment, the outer diameter of the bottom cylinder 11 is the same as the outer diameter of the glass tube 2.
[0036] As an example, the central axis of the through hole 41 passes through the center point of the heat insulation block 4. In this embodiment, the aperture of the through hole 41 is 50 mm. The position of the through hole 41 is at the center of the heat insulation block 4, so that the centers of the heat insulation block 4 and the glass tube 2 are on the central axis of the glass tube, thereby reducing the offset phenomenon caused by unstable center of gravity.
[0037] As an example, the heat insulation block 4 is a cube, and its side length is 100 mm. In other embodiments, the size range of the side length of the cube-shaped heat insulation block 4 is 80 - 120 mm, that is, the side length of the cube-shaped heat insulation block 4 is 80 mm, 81 mm, 82 mm, 83 mm, 84 mm, 85 mm, 86 mm, 87 mm, 88 mm, 89 mm, 90 mm, 91 mm, 92 mm, 93 mm, 94 mm, 95 mm, 96 mm, 97 mm, 98 mm, 99 mm, 100 mm, 101 mm, 102 mm, 103 mm, 104 mm, 105 mm, 106 mm, 107 mm, 108 mm, 109 mm, 110 mm, 111 mm, 112 mm, 113 mm, 114 mm, 115 mm, 116 mm, 117 mm, 118 mm, 119 mm, 120 mm.
[0038] In other embodiments, the heat insulation block 4 can be a cuboid, or a disc shape, an ellipse shape, etc.
[0039] In other embodiments, the aperture of the through hole 41 is 45 - 55 mm. Specifically, the aperture of the through hole 41 can be 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm respectively.
[0040] In other embodiments, the heat insulation block can be other regular polyhedrons, such as a regular hexahedron, etc. The central axis of the through hole passes through the geometric center.
[0041] The dew point meter of the embodiment of the present utility model has the following working principle: during the sublimation process of dry ice in the glass tube 2, the first heat insulation film layer 31 insulates the bottom cylinder 11 to reduce the contact with air. Similarly, the second heat insulation film layer 32 insulates the glass tube 2.
[0042] Then, multiple heat insulation blocks 4 are used to insulate the bottom cylinder 11 and the glass tube 2 already wrapped with plastic film, thereby improving the utilization rate of dry ice.
[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A dew point meter, characterized in that, It includes a first heat insulation film layer, a test tube, a probe and a display; The test tube includes a copper groove and a glass tube, and both ends of the glass tube are open; The copper groove includes an embedding cylinder and a bottom cylinder. Both ends of the embedding cylinder are open, one end of the bottom cylinder is open, and the other end of the bottom cylinder is closed; One end of the embedding cylinder is connected to the open end of the bottom cylinder, and the other end of the embedding cylinder is embedded in the glass tube; The first heat insulation film layer is cylindrical, and the first heat insulation film layer is sleeved on the bottom cylinder to wrap the side wall of the bottom cylinder; The probe extends into the glass tube, and the probe is electrically connected to the display.
2. The dew point meter according to claim 1, wherein, It further includes a second heat insulation film layer. The second heat insulation film layer is cylindrical, and the second heat insulation film layer is sleeved on the glass tube to wrap the side wall of the glass tube.
3. The dew point meter according to claim 2, wherein The second heat insulation film layer and the first heat insulation film layer are arranged along the axial direction of the glass tube, and the opposite ends of the second heat insulation film layer and the first heat insulation film layer are connected.
4. The dew point meter according to claim 2, characterized in that, The thickness of the first heat insulation film layer is 0.5 - 1.5 mm, and the thickness of the second heat insulation film layer is 0.5 - 1.5 mm.
5. The dew point meter according to claim 2, wherein, It further includes a plurality of heat preservation blocks. Each heat preservation block is provided with a through hole. A part of the heat preservation blocks are sleeved on the first heat insulation film layer through the through hole, and the remaining heat preservation blocks are sleeved on the second heat insulation film layer through the through hole. The plurality of heat preservation blocks are arranged along the axial direction of the glass tube.
6. The dew point meter according to claim 5, characterized in that, Along the axial direction of the glass tube, the closed end of the bottom cylinder protrudes from the adjacent heat preservation block, and the end face of the closed end of the bottom cylinder and the surface of the adjacent heat preservation block are spaced apart.
7. A dew point meter according to claim 5, characterized in that, Along the axial direction of the glass tube, the interval between the end face of the closed end of the bottom cylinder and the surface of the adjacent heat preservation block is 1 - 5 mm.
8. A dew point meter according to claim 1, characterized in that, The orthographic projection of the glass tube on the end face of the closed end of the bottom cylinder coincides with the orthographic projection of the side wall of the bottom cylinder on the end face of the closed end of the bottom cylinder.
9. A dew point meter according to claim 5, characterized in that, The heat preservation block is a regular polyhedron.
10. A dew point meter according to claim 9, characterized in that, The axis of the through hole passes through the geometric midpoint of the heat preservation block.