A humidity control system for a wide temperature range

Abstract

The present invention discloses a humidity regulation system for a wide temperature range, comprising a water supply system, a pressure compensation pipeline connected to the input end of an evaporation saturation temperature control system via a multi-way component and a gas-liquid sampling multi-way component, and connecting the output end of the evaporation saturation temperature control system to the pressure compensation end of the water supply system; the present invention adopts forced active mixed evaporation in a porous medium to strengthen and stabilize evaporation within various temperature ranges; separates the evaporation saturation zone from a water storage tank to minimize the size of the evaporation saturation zone, reduces the difficulty of temperature control, and improves the temperature control accuracy; and adds an adaptive instant water replenishment structure to achieve water replenishment in an external water tank without interfering with the temperature stability of the evaporation zone.

Description

Technical Field

[0001] The present invention relates to an innovative invention belonging to the field of environmental simulation, and specifically to a humidity regulation system for a large temperature range. Background Art

[0002] Many products used in industrial production and daily life require stability and reliability testing in specific temperature and humidity environments, including winter, summer, coastal areas, and jungles. This requires testing equipment capable of simulating a wide range of temperatures and humidity, from tens of degrees below zero to nearly 100 degrees Celsius.

[0003] The three existing mainstream temperature and humidity generation methods all find it difficult to obtain stable and accurate temperature and humidity output in high temperature and high humidity areas, and it is even more difficult to cover all of the above ranges.

[0004] The first type of generation method, such as the salt solution method and the osmosis method, is based on controlling the evaporation (permeation) rate of water vapor. This method usually can control the steam evaporation rate very low and is only suitable for applications with specific low temperature and humidity.

[0005] The second generation method primarily involves creating saturated gas at a lower temperature (or higher pressure) than the target temperature and humidity. The temperature (or pressure) is then adjusted to achieve the desired temperature and humidity. Examples include the dual-temperature and dual-pressure methods. This method offers a higher level of measurement accuracy. However, it requires the target temperature and humidity to be well above the boiling point of water. Otherwise, the boiling point may be crossed during the temperature and pressure adjustment process, resulting in a dramatic phase change that would compromise accuracy and stability.

[0006] The third type of generation method, such as the dual-flow method, primarily involves generating a dry airflow and a fully saturated airflow at the same temperature as the target humidity. The flow ratio of the dry and fully saturated airflows is then adjusted to achieve the desired humidity. This method has a simple structure and a wide range of applications, and in principle, can cover a wide range of temperatures and humidity. However, existing dual-flow generation equipment, due to structural shortcomings, is typically only suitable for temperature and humidity generation within room temperature (-60°C).

[0007] Most of the existing double-flow generating devices use the bubbling method (as shown in the figure) Figure 1 ) to obtain saturated humidity airflow. If we want to further expand the temperature and humidity range, we will face the following obstacles:

[0008] (1) When high temperature and high humidity occur, the water in the bubbler saturator is close to boiling, resulting in very unstable airflow and mass transfer;

[0009] (2) When high temperature and high humidity occur, the evaporation volume is large and the water in the saturator is quickly consumed. Improper external water replenishment rhythm causes temperature fluctuations in the saturator, further deteriorating the performance of the saturator.

[0010] (3) Regardless of the temperature, the temperature of the entire saturator must be controlled. The saturator is responsible for both evaporation and water storage. It is large in size, difficult to control the temperature evenly, and has high energy consumption. Summary of the Invention

[0011] In view of this, it is necessary to overcome at least one of the above-mentioned defects in the prior art. The present invention provides a humidity control system for a large temperature range, including a water supply system, an input end of an evaporation saturation temperature control system connected to the water supply system through a multi-way component and a gas-liquid injection multi-way component, and a pressure compensation pipeline connecting the output end of the evaporation saturation temperature control system to the pressure compensation end of the water supply system; the gas-liquid injection multi-way component includes an air inlet end, a gas-liquid mixing end and a liquid inlet end, the water supply system is connected to the liquid inlet end of the gas-liquid injection multi-way component at the input end of the evaporation saturation temperature control system through the first end of the multi-way component and the second end of the multi-way component, the air inlet end is connected to a carrier gas supply system, the gas-liquid mixing end is connected to the input end of the evaporation saturation temperature control system, and the return water output end of the evaporation saturation temperature control system is connected to the return water end of the multi-way component.

[0012] The technical solution applied for in this case is to change the passive bubbling evaporation saturation mode to forced active mixed evaporation in the porous medium through the return water circuit, pressure compensation circuit and porous medium evaporation saturation module, thereby strengthening and stabilizing evaporation within various temperature ranges; separating the evaporation saturation zone and the water storage tank, minimizing the size of the evaporation saturation zone, reducing the difficulty of temperature control, and improving the temperature control accuracy; adding an adaptive instant water replenishment structure to realize external water tank replenishment without interfering with the temperature stability of the evaporation zone.

[0013] In addition, the humidity control system for a wide temperature range disclosed in the present invention also has the following additional technical features:

[0014] Furthermore, the multi-way component is a three-way component, the gas-liquid injection multi-way component is a gas-liquid injection three-way component, the return water output end of the evaporation saturation temperature control system passes through the third end of the three-way component and the second end of the three-way component, connected to the infusion end of the gas-liquid injection three-way component, and enters the evaporation saturation temperature control system through the gas-liquid mixing end of the gas-liquid injection three-way component to form a return water loop.

[0015] The circulation pump is set to a constant flow rate; the height of the circulation pump inlet is set below or near the lower limit water level of the water storage tank; a tee is set at the circulation pump inlet, and the following Figure 4Connect the circulation pump, evaporation zone return water, and storage tank in the order shown. The circulation pump prioritizes water drawn from the saturated evaporation zone, while any remaining water is automatically replenished by gravity from the storage tank. This provides continuous, adaptive replenishment of water, eliminating temperature fluctuations caused by intermittent, large-scale replenishment. Excess water returns to the circulation pump's inlet tee via gravity for further circulation.

[0016] Furthermore, the water supply system includes a water storage tank, and the output end of the evaporation saturation temperature control system is connected to the pressure compensation end of the water storage tank through a pressure compensation pipeline, and is connected to the first end of the multi-pass component through the output end of the water storage tank, and then connected to the input end of the evaporation saturation temperature control system to form a pressure compensation loop.

[0017] In the pressure compensation circuit, a pressure-compensated connection must be established between the saturator outlet and the water storage tank via a pipe. Otherwise, the water storage tank will not be able to automatically replenish the circulating pump by gravity, resulting in the circulating pump only pumping return water (or running dry).

[0018] Furthermore, a circulating power source is included between the multi-way component and the gas-liquid injection multi-way component, the input end of the circulating power source is connected to the second end of the multi-way component, and the output end is connected to the input end of the gas-liquid injection multi-way component. The circulating power source is connected to the water supply system including the water storage tank through the first end of the multi-way component and the second end of the multi-way component is connected to the return water output end of the evaporation saturation temperature control system.

[0019] Furthermore, the circulating power source is a circulating water pump.

[0020] Furthermore, the height of the circulating power source input port is lower than or equal to the lower limit water level of the water supply system.

[0021] Furthermore, the multi-pass component includes a first end connected to the water supply system, a second end connected to the circulating power source, and a third end connected to the return water output end of the evaporation saturation temperature control system. The saturator also includes the multi-pass component control system that controls the multi-pass component to preferentially extract return water from the return water output section of the evaporation saturation temperature control system.

[0022] Furthermore, the evaporation saturation temperature control system includes a porous medium, a constant temperature module, and a gas-liquid separator connected to the porous medium. The gas-liquid mixing end of the gas-liquid injection multi-channel component is connected to the porous medium input end. The gas-liquid separator includes a moisture output end and a return water end. The return water end is connected to the return water output end of the evaporation saturation temperature control system.

[0023] Furthermore, the porous medium and the gas-liquid separator are arranged in the constant temperature module.

[0024] Furthermore, the evaporation saturation temperature control system includes a porous medium, and the porous medium includes an evaporation enhancement and stabilization zone.

[0025] Furthermore, the evaporation saturation temperature control system includes a constant temperature module, which solidifies the heating tube, the porous medium evaporation zone and the gas-liquid separator into an integrated structure by liquid aluminum casting. The constant temperature module is connected to the first end of the four-way, the second end of the four-way outputs saturated moisture, the third end of the four-way is connected to the gas phase space in the water storage tank in the water supply system, the fourth end of the four-way is connected to the return water end, and the four-way is connected to a temperature measuring component that feeds back the constant temperature module.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 Schematic diagram of a bubbling saturator in the prior art;

[0029] Figure 2 A schematic diagram of an embodiment of the present application;

[0030] Figure 3 Schematic diagram of an evaporation saturation temperature control system in one embodiment of the present application;

[0031] Figure 4 A schematic diagram of a multi-pass component connection method in one embodiment of the present application;

[0032] Figure 5 In one embodiment of the present application, a schematic diagram of a temperature and humidity output curve is used to generate humidity at room temperature, with the horizontal axis being time and the vertical axis being temperature and humidity. C1 outputs temperature and C2 outputs humidity.

[0033] Figure 6 In one embodiment of the present application, the saturator is used to output a temperature and humidity curve near the boiling point (92°C), with the vertical axis being temperature and humidity, and the horizontal axis being time, with C1 outputting temperature and C2 outputting humidity;

[0034] Among them, A saturated humidity gas output, B carrier gas circuit, 1 water supply system, 12 water supply system pressure compensation end, 11 water storage tank, 2 multi-way component, 21 multi-way component first end, 22 multi-way component second end, 23 multi-way component third end / return water end, 3 evaporation saturation temperature control system, 30 four-way, 301 four-way first end, 31 evaporation saturation temperature control system input end, 32 evaporation saturation temperature control system return water output end / four-way fourth end, 33 saturated humidity gas output end / four-way second end, 34 gas-liquid separator, 35 porous medium, 36 constant temperature module, 37 evaporation saturation temperature control system pressure compensation end / four-way third end, 4 gas-liquid injection multi-way component, 41 gas inlet end, 42 liquid inlet end, 43 gas-liquid mixing end, 5 circulation power source, 6 pressure compensation pipeline, 7 return water loop. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar identification objects or identification objects having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] The optimized spectral line data analysis method of the present invention will be described below with reference to the accompanying drawings, wherein Figure 1 Schematic diagram of a bubbling saturator in the prior art; Figure 2 A schematic diagram of an embodiment of the present application; Figure 3 Schematic diagram of an evaporation saturation temperature control system in one embodiment of the present application; Figure 4 Schematic diagram of the connection mode of the circulating power source pipeline in one embodiment of the present application; Figure 5 In one embodiment of the present application, a schematic diagram of a temperature and humidity output curve is used to generate humidity at room temperature, with the horizontal axis being time and the vertical axis being temperature and humidity. C1 outputs temperature and C2 outputs humidity. Figure 6 In one embodiment of the present application, the saturator is used to output a temperature and humidity curve near the boiling point (92° C.), with the vertical axis representing temperature and humidity and the horizontal axis representing time. C1 outputs temperature and C2 outputs humidity.

[0037] According to an embodiment of the present invention, Figure 2As shown, it includes a water supply system, an input end of an evaporation saturation temperature control system connected to the water supply system through a multi-way component and a gas-liquid injection multi-way component, and a pressure compensation pipeline connecting the output end of the evaporation saturation temperature control system to the pressure compensation end of the water supply system; the gas-liquid injection multi-way component includes an air inlet end, a gas-liquid mixing end and a liquid inlet end, the water supply system is connected to the liquid inlet end of the gas-liquid injection multi-way component at the input end of the evaporation saturation temperature control system through the first end of the multi-way component and the second end of the multi-way component, the air inlet end is connected to a carrier gas supply system, the gas-liquid mixing end is connected to the input end of the evaporation saturation temperature control system, and the return water output end of the evaporation saturation temperature control system is connected to the return water end of the multi-way component.

[0038] According to some embodiments of the present invention, the multi-way component is a three-way component, the gas-liquid injection multi-way component is a gas-liquid injection three-way component, the return water output end of the evaporation saturation temperature control system passes through the third end of the three-way component and the second end of the three-way component, connected to the infusion end of the gas-liquid injection three-way component, and enters the evaporation saturation temperature control system through the gas-liquid mixing end of the gas-liquid injection three-way component to form a return water loop.

[0039] According to some embodiments of the present invention, the water supply system includes a water storage tank, and the output end of the evaporation saturation temperature control system is connected to the pressure compensation end of the water storage tank through a pressure compensation pipeline, and is connected to the first end of the multi-pass component through the output end of the water storage tank, and then connected to the input end of the evaporation saturation temperature control system to form a pressure compensation loop. The output end of the evaporation saturation temperature control system is connected to the pressure compensation end of the water storage tank through the pressure compensation pipeline, which means that the output end is connected to the meteorological part in the water storage tank to form the same pressure atmosphere.

[0040] According to some embodiments of the present invention, a circulating power source is included between the multi-way component and the gas-liquid injection multi-way component, the input end of the circulating power source is connected to the second end of the multi-way component, and the output end is connected to the input end of the gas-liquid injection multi-way component, the circulating power source is connected to the water supply system including the water storage tank through the first end of the multi-way component, and the second end of the multi-way component is connected to the return water output end of the evaporation saturation temperature control system.

[0041] According to some embodiments of the present invention, the circulating power source is a circulating water pump, and the height of the circulating power source input port is lower than or equal to the lower limit water level of the water supply system.

[0042] According to some embodiments of the present invention, the multi-channel component includes a first end connected to the water supply system, a second end connected to the circulating power source, and a third end connected to the return water output end of the evaporation saturation temperature control system. The saturator also includes the multi-channel component control system that controls the multi-channel component to preferentially extract return water from the return water output section of the evaporation saturation temperature control system.

[0043] According to some embodiments of the present invention, the evaporation saturation temperature control system includes a porous medium, a constant temperature module, and a gas-liquid separator connected to the porous medium. The gas-liquid mixing end of the gas-liquid injection multi-channel component is connected to the porous medium input end. The gas-liquid separator includes a moisture output end and a return water end. The return water end is connected to the return water output end of the evaporation saturation temperature control system.

[0044] According to some embodiments of the present invention, the porous medium and the gas-liquid separator are arranged in the constant temperature module, the evaporation saturation temperature control system includes a porous medium, and the porous medium includes an evaporation enhancement and stabilization zone.

[0045] According to some embodiments of the present invention, the evaporation saturation temperature control system includes a constant temperature module, which is solidified into an integrated structure by liquid aluminum casting of a heating tube, a porous medium evaporation zone, and a gas-liquid separator. The constant temperature module is connected to the first end of a four-way valve, the second end of which outputs saturated moisture, the third end of which is connected to the gas phase space in the water storage tank in the water supply system, and the fourth end of which is connected to the return water end. The four-way valve is connected to a temperature measurement component that provides feedback to the constant temperature module. The temperature measurement component transmits the temperature of the constant temperature module to a control unit, and the control unit controls the temperature of the constant temperature module.

[0046] According to one embodiment of the present invention, the heating tube, porous medium evaporation zone, and gas-liquid separator are solidified into one solid body through liquid aluminum casting. Due to the high thermal conductivity of aluminum, this block serves as a constant temperature module. The outlet of the constant temperature module has a stainless steel four-way valve, which respectively discharges saturated moisture and connects to the water storage tank for pressure compensation. A thermocouple is installed vertically along the four-way valve to control the temperature of the constant temperature module. The circulation pump uses a peristaltic pump with a circulation flow rate of 2-30 mL / min. When the water level in the water storage tank is higher than the bottom water inlet, water is automatically replenished from the bottom.

[0047] According to one embodiment of the present invention, the present invention is incorporated into a dual-flow humidity generator. At room temperature (about 26°C), the humidity fluctuation output by the humidity generator is approximately ±0.1% (reading, see Figure 5 At a temperature close to the boiling point of water (about 92°C), the humidity fluctuation is only ±1.5% (reading, see Figure 6 ), while with ordinary saturators, humidity fluctuations reach 30-50%.

[0048] At the same time, when the present invention is tested at a lower temperature (placed in a low-temperature box), the effect is also far superior to that of the traditional saturator.

[0049] According to one embodiment of the present invention, a circulating water pump pumps water into the gas-liquid inlet tee. The circulating water pump's flow rate must be greater than the maximum evaporation capacity required for saturation. Simultaneously, dry carrier gas (typically air, but other gases are acceptable) also enters the tee for initial mixing with the water. The resulting vapor-water mixture enters the saturated evaporation zone.

[0050] According to one embodiment of the present invention, the saturated evaporation zone includes three parts: temperature control, evaporation and gas-liquid separation. Figure 3 As shown. The above-mentioned gas-water mixture enters an evaporation enhancement and stabilization zone composed of porous media to achieve efficient and stable saturation. Since the amount of water in the gas-water mixture is excess to the amount required for saturation, it needs to further pass through a gas-liquid separator. In this way, the required saturated moisture is generated along the way and the excess water is returned along the way. The above-mentioned evaporation zone and gas-liquid separator are both contained in a constant temperature module. The constant temperature module can have a heating function, a cooling function, or both functions to meet the requirements of different temperature ranges.

[0051] Although the specific embodiments of the present invention have been described in detail with reference to a number of illustrative embodiments thereof, it must be understood that a variety of other modifications and embodiments may be devised by those skilled in the art that fall within the spirit and scope of the principles of the present invention. Specifically, within the scope of the foregoing disclosure, the accompanying drawings, and the claims, reasonable variations and improvements may be made in the arrangement of the components and / or the dependent combinations without departing from the spirit of the present invention; except for variations and improvements in the components and / or the arrangement, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A humidity control system for a wide temperature range, characterized in that: It includes a water supply system, a pressure compensation pipeline connecting the input end of the evaporation saturation temperature control system to the water supply system through a multi-way component and a gas-liquid injection multi-way component, and connecting the output end of the evaporation saturation temperature control system to the pressure compensation end of the water supply system; The gas-liquid injection multi-way component includes an air inlet end, a gas-liquid mixing end and a liquid inlet end. The water supply system is connected to the liquid inlet end of the gas-liquid injection multi-way component at the input end of the evaporation saturation temperature control system through the first end of the multi-way component and the second end of the multi-way component. The air inlet end is connected to the carrier gas supply system, the gas-liquid mixing end is connected to the input end of the evaporation saturation temperature control system, and the return water output end of the evaporation saturation temperature control system is connected to the return water end of the multi-way component; the evaporation saturation temperature control system includes a porous medium, a constant temperature module, and a gas-liquid separator connected to the porous medium. The gas-liquid mixing end of the gas-liquid injection multi-way component is connected to the input end of the porous medium, the gas-liquid separator includes a moisture output end and a return water end, and the return water end is connected to the return water output end of the evaporation saturation temperature control system. The porous medium and the gas-liquid separator are arranged in the constant temperature module, and the porous medium includes an evaporation enhancement and stabilization zone.

2. A humidity control system for a wide temperature range according to claim 1, characterized in that: The multi-way component is a three-way component, and the gas-liquid injection multi-way component is a gas-liquid injection three-way component. The return water output end of the evaporation saturation temperature control system passes through the third end of the three-way component and the second end of the three-way component, is connected to the infusion end of the gas-liquid injection three-way component, and enters the evaporation saturation temperature control system through the gas-liquid mixing end of the gas-liquid injection three-way component to form a return water loop.

3. The humidity control system for a wide temperature range according to claim 1, characterized in that: The water supply system includes a water storage tank. The output end of the evaporation saturation temperature control system is connected to the pressure compensation end of the water storage tank through a pressure compensation pipeline, and is connected to the first end of the multi-channel component through the output end of the water storage tank, and is further connected to the input end of the evaporation saturation temperature control system to form a pressure compensation loop.

4. A humidity control system for a wide temperature range according to claim 1, characterized in that: A circulating power source is included between the multi-channel component and the gas-liquid injection multi-channel component. The input end of the circulating power source is connected to the second end of the multi-channel component, and the output end is connected to the input end of the gas-liquid injection multi-channel component. The circulating power source is connected to the water supply system including the water storage tank through the first end of the multi-channel component and the second end of the multi-channel component is connected to the return water output end of the evaporation saturation temperature control system.

5. A humidity control system for a wide temperature range according to claim 4, characterized in that: The circulating power source is a circulating water pump, and the height of the circulating power source input port is lower than or equal to the lower limit water level of the water supply system.

6. The humidity control system for a wide temperature range according to claim 4, characterized in that: The multi-pass component includes a first end connected to the water supply system, a second end connected to the circulating power source, and a third end connected to the return water output end of the evaporation saturation temperature control system. The evaporation saturation temperature control system also includes a multi-pass component control system that controls the multi-pass component to preferentially extract return water from the return water output section of the evaporation saturation temperature control system.

7. The humidity control system for a wide temperature range according to claim 1, characterized in that: The evaporation saturation temperature control system includes a constant temperature module, which solidifies a heating tube, a porous medium evaporation zone and a gas-liquid separator into an integrated structure by liquid aluminum casting. The porous medium is connected to the first end of a four-way valve, the second end of the four-way valve outputs saturated moisture, the third end of the four-way valve is connected to the gas phase space in the water storage tank in the water supply system, the fourth end of the four-way valve is connected to the return water end, and the four-way valve is connected to a temperature measuring component that provides feedback to the constant temperature module.

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