Mirror dew-point instrument

Abstract

The utility model provides a mirror dew-point instrument. The mirror dew-point instrument comprises a temperature control mechanism and a detection mechanism, the temperature control mechanism comprises a refrigeration sheet heater and a mirror board. And the heater is arranged between the refrigeration sheet and the mirror board. The detection mechanism is arranged above the mirror board, so that detection light of the detection mechanism is reflected by the surface of the mirror board and then returns to the receiving unit. And after detection is completed, the refrigeration sheet stops refrigeration, and then natural temperature returning is carried out. In some special scenes, dew points need to be continuously measured. And the temperature returning efficiency of the mirror board is low. The mirror board can be heated through the heater, so that the temperature can be quickly recovered, and the next measurement can be quickly carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of mirror dew point meters, and more particularly to a mirror dew point meter. Background Art

[0002] Common mirror dew point meters are used to detect the dew point and then determine the humidity of the air. Its principle is to cool the mirror surface through a refrigeration mechanism. When the gas to be measured passes through the mirror surface, it will be cooled and condensed to form water mist on the mirror surface. Further, the mirror surface changes from specular reflection to diffuse reflection, and the amount of reflected light received by the detection unit decreases, thereby obtaining the dew point of the gas.

[0003] The prior art generally uses a semiconductor refrigeration mechanism for refrigeration without a heating function. When the temperature of the mirror surface drops, it needs to naturally return to room temperature. It cannot be well adapted to some scenarios that require rapid recovery to room temperature. Some foreign mirror dew point meters also use a Stirling refrigeration mechanism for refrigeration. The Stirling refrigerator also has no heating function, and since the Stirling refrigerator is not easily obtained and the price is extremely expensive, few people use it in China except for some scientific research institutions. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mirror dew point meter, which can quickly restore the temperature of the mirror panel and thus adapt to the scenario of rapid recovery to room temperature.

[0005] The embodiments of the utility model are realized by the following technical solutions:

[0006] A mirror dew point meter includes a temperature control mechanism and a detection mechanism; the temperature control mechanism includes a thermoelectric cooler heater and a mirror panel; the heater is arranged between the thermoelectric cooler and the mirror panel; the detection mechanism is arranged above the mirror panel, so that the detection light of the detection mechanism is reflected back to the receiving unit after passing through the surface of the mirror panel.

[0007] Further, the thermoelectric cooler is a semiconductor thermoelectric cooler; several thermoelectric coolers are provided and the hot ends of adjacent thermoelectric coolers are stacked with the cold ends in contact; the heater is attached to the cold end of the thermoelectric cooler at the end.

[0008] Further, the temperature control mechanism further includes a compression refrigeration unit; the compression refrigeration unit includes a compressor, a condenser and an evaporator connected in a loop; the evaporator is attached to the hot end of the thermoelectric cooler at the end.

[0009] Further, the outside of the temperature control mechanism is wrapped with a heat insulation layer and only a detection port is reserved on the surface of the mirror panel.

[0010] Further, a conductor is also arranged between the heater and the thermoelectric cooler; the conductor is made of red copper.

[0011] Further, the mirror panel is made of red copper; the surface of the mirror panel is gold-plated to form a mirror surface.

[0012] Further, the heater is an electric heating wire; the electric heating wire is wound around the outside of the conductor.

[0013] Further, a fan blade is further arranged at the bottom of the evaporator, so that the fan blade pushes the air flow to flow through the evaporator to the hot end of the refrigerating sheet.

[0014] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0015] When the mirror dew point meter of the present utility model is in use, the mirror panel is cooled by the refrigerating sheet, and then when the air flow passes through, water vapor in the air flow forms water droplets on the mirror panel. The light emitted by the detection mechanism is irradiated onto the mirror panel and changes from specular reflection to diffuse reflection after being reflected by the mirror surface, and the amount of reflected light received by the receiver is greatly reduced. The temperature of the mirror panel with the reduced received light amount is determined as the dew point of the currently detected gas.

[0016] After the detection is completed, the refrigerating sheet stops refrigerating, and then natural temperature recovery is carried out. In some special scenarios, the dew point needs to be continuously measured. However, the temperature recovery efficiency of the mirror panel is relatively low. By setting a heater, the mirror panel can be heated by the heater, so as to quickly restore the temperature and quickly enter the next measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the mirror dew point meter of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged view of part a in;

[0020] Figure 3 It is another schematic structural diagram of the temperature control mechanism.

[0021] Reference numerals: 1 - detection mechanism, 2 - refrigerating sheet, 3 - heater, 4 - mirror panel, 5 - compressor, 6 - condenser, 7 - evaporator, 8 - conductor, 9 - fan blade, 10 - thermal insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Embodiment:

[0024] As Figures 1 - 3 shown, the present utility model provides a mirror dew point meter, which includes a temperature control mechanism and a detection mechanism 1. The temperature control mechanism includes a Peltier cooler 2, a heater 3, and a mirror panel 4. The mirror panel 4 is made of copper, which has good heat conduction performance. The surface of the mirror panel 4 is gold-plated to form a mirror surface. The heater 3 is arranged between the Peltier cooler 2 and the mirror panel 4. The heater 3 can adopt a ceramic heating sheet, which can generate heat after being powered on. Its two sides are respectively attached to the Peltier cooler 2 and the mirror panel 4. The detection mechanism 1 is arranged above the mirror panel 4, so that the detection light of the detection mechanism 1 is reflected back to the receiving unit after being reflected by the surface of the mirror panel 4. The structure and principle of the detection mechanism 1 are the same as those of common mirror dew point meters, and will not be elaborated here.

[0025] When the mirror dew point meter of the present utility model is in use, the Peltier cooler 2 is used to cool the mirror panel 4, so that when the air flow passes through, water vapor in the air flow forms water droplets on the mirror panel 4. The light emitted by the detection mechanism 1 is irradiated onto the mirror panel 4 and changes from specular reflection to diffuse reflection, and the amount of reflected light received by the receiver is greatly reduced. The temperature of the mirror panel 4 with reduced received light amount is determined as the dew point of the currently detected gas.

[0026] Basically, mirror dew point meters are all on-line detection instruments, and their measurement of the dew point temperature is continuous, that is, the surface temperature of the mirror changes with the water content in the gas passing through the mirror. When the heater 3 is set to rapidly increase the dew point temperature of the gas (for example, when testing low-temperature dew points and suddenly mixing humid air with more moisture in the gas), the mirror panel 4 can be heated by the heater to rapidly track the change of the gas dew point temperature. Another purpose of setting the heater 3 is to achieve the so-called DCC dynamic pollution control, that is, to start the dynamic pollution control for 2 - 4 minutes every once in a while when starting up or during operation. During this process, the temperature of the heater 3 is controlled to about 40 °C to evaporate the water vapor on the mirror surface, and the residual impurities on the mirror surface are blown out by the gas, so as to keep the mirror surface clean.

[0027] In this embodiment, the Peltier cooler 2 is a semiconductor Peltier cooler 2. When powered on, one side of it generates heat as the hot end, and the other side cools as the cold end. A plurality of Peltier coolers 2 are provided, and the hot ends of adjacent Peltier coolers 2 are attached to the cold ends and stacked. As Figure 2As shown, after a plurality of refrigeration sheets 2 are stacked, the refrigeration effect of the cold end thereof is better. The heater 3 is attached to the cold end of the refrigeration sheet 2 at the end.

[0028] In this embodiment, a refrigeration unit including a compressor 5 is provided, and its principle is the same as that of an air conditioner. Figure 1 As shown, the compressor 5 refrigeration unit includes a compressor 5, a condenser 6 and an evaporator 7 connected in a loop. The evaporator 7 is attached to the hot end of the terminal refrigeration plate 2. Several overlapping refrigeration plates 2 transfer heat to the hot end of the terminal refrigeration plate 2 step by step. If a large amount of heat here cannot be discharged in time, the refrigeration effect will be weakened. Therefore, a compressor 5 refrigeration unit is set. When working, the refrigerant inside the evaporator 7 absorbs heat and evaporates, making the evaporator 7 cooler. This also enables the evaporator 7 to dissipate heat from the hot end.

[0029] In this embodiment, the mirror plate 4, the heater 3, the cooling fins 2 and the evaporator 7 are wrapped with a heat preservation layer 10 and only a detection port is reserved on the surface of the mirror plate 4. In other words, all parts of these components are wrapped with the heat preservation layer 10, and only the upper surface of the mirror plate 4 is not wrapped, that is, the detection port is formed. Figure 2 and 3 As shown, the insulation layer 10 can well insulate, thereby reducing the influence of the outside temperature on the temperature control effect. At the same time, it also makes the temperature control variables less, making temperature control more convenient.

[0030] In this embodiment, a conductor 8 is further provided between the heater 3 and the cooling plate 2. The conductor 8 is made of copper. Copper has a good heat conduction effect. The heater 3 can also be provided as an electric heating wire. Figure 3 As shown, the heating wire is wound around the outside of the conductor 8. The cooling effect of the cooling sheet 2 can be quickly transferred to the mirror plate 4 through the conductor 8. When the heating wire is heated, its heat can also be quickly transferred to the mirror plate 4 through the conductor 8. Compared with arranging the ceramic heating sheet between the conductor 8 and the mirror plate 4, the conductor 8 directly transfers heat or cold to the mirror plate 4 with higher efficiency.

[0031] In this embodiment, a fan blade 9 is further provided at the bottom of the evaporator 7 so that the fan blade 9 pushes the airflow through the evaporator 7 to flow to the hot end of the refrigeration fin 2. Figure 3 As shown, when the fan blade 9 pushes the airflow to the hot end, the airflow first passes through the evaporator 7 and is cooled by the evaporator 7. The cooled cold air then contacts the hot end to cool the hot end. The evaporator 7 has a certain thickness, and only the upper surface is attached to the hot end. It is difficult for the cold energy at the lower end of the evaporator 7 to reach the hot end. Through this fan blade 9, the cold energy from various parts of the evaporator 7 can be better gathered at the hot end. Gaps are reserved on the side and air inlet surface of the fan blade 9 so that the airflow can form a loop and then circulate and transfer heat.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, 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 mirror dew point meter, characterized in that: It includes a temperature control mechanism and a detection mechanism; the temperature control mechanism includes a thermoelectric cooler, a heater and a mirror panel; the heater is arranged between the thermoelectric cooler and the mirror panel; the detection mechanism is arranged above the mirror panel, so that the detection light of the detection mechanism is reflected back to the receiving unit after passing through the surface of the mirror panel.

2. The mirror dew point meter according to claim 1, wherein: The thermoelectric cooler is a semiconductor thermoelectric cooler; several thermoelectric coolers are provided and the hot ends of adjacent thermoelectric coolers are stacked with their cold ends in contact. The heater is attached to the cold end of the thermoelectric cooler at the end.

3. The mirror dew point meter according to claim 2, wherein: It further includes a compression refrigeration unit; the compression refrigeration unit includes a compressor, a condenser and an evaporator connected in a loop; the evaporator is attached to the hot end of the thermoelectric cooler at the end.

4. The mirror dew point meter according to claim 3, characterized in that: The mirror panel, the heater, the thermoelectric cooler and the evaporator are wrapped with a heat insulation layer and only a detection port is reserved on the surface of the mirror panel.

5. The mirror dew point meter according to claim 4, wherein: A conductor is also arranged between the heater and the thermoelectric cooler; the conductor is made of red copper.

6. The mirror dew point meter according to claim 5, wherein: The mirror panel is made of red copper; the surface of the mirror panel is gold-plated to form a mirror surface.

7. The mirror dew point meter according to claim 6, wherein: The heater is an electric heating wire; the electric heating wire is wound around the outside of the conductor.

8. The mirror dew point meter according to claim 7, characterized in that: A fan blade is further arranged at the bottom of the evaporator, so that the fan blade pushes the air flow to flow through the evaporator to the hot end of the thermoelectric cooler.

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