Water tank with non-dewing gas phase part and control method thereof

Abstract

The water tank comprises a water tank body, a temperature probe, a temperature and humidity probe, a system controller and an exhaust device, a water tank defined by a plurality of plate walls is arranged in the water tank body and used for storing drinking water, and the part, not making contact with water all the time, of the position close to the top in the water tank is the gas phase part. The temperature and humidity probe is used for detecting the temperature T and the relative humidity RH in the gas phase part and feeding back the temperature T and the relative humidity RH to the system controller; the temperature probe is used for detecting the plate wall temperature TW at the position of the gas phase part and feeding back the plate wall temperature TW to the system controller; and the system controller judges whether the working state of the exhaust device needs to be switched according to the detection data of the temperature and humidity probe, the detection data of the temperature probe and the current working state of the exhaust device, so that the exhaust device works intermittently, and meanwhile, the dew point temperature Td is controlled to be lower than the plate wall temperature of the gas phase part all the time. In addition, the invention further provides a water tank control method with the gas phase part free of condensation.

Description

Technical Field

[0001] The present invention relates to water storage equipment, in particular to a water tank with no condensation in the gas phase and a control method thereof. Background Art

[0002] like Figure 1 As shown, the internal space of water tank 10a is divided into a gas phase 11a and a liquid phase 12a. During use, the water level of water tank 10a moves up and down, and the portion that never contacts the water is called gas phase 11a. For large water tanks 10a storing drinking water, since disinfectants such as sodium hypochlorite used to disinfect drinking water contain chloride ions, the volatilization of chloride ions causes not only the liquid phase 12a to be filled with chloride ions, but also the gas phase 11a to be filled with chloride ions 14a. These different forms of chloride ions and their compounds (chloride ions can exist in different forms in gas and liquid water, including free ions, bound ions, and gases, which is very complex. For the sake of simplicity, this article uses the term chloride ions indiscriminately) make the inner wall of water tank 10a, especially the environment of gas phase 11a, extremely corrosive.

[0003] The reason for the corrosion of the gas phase part 11 is that the lower part of the gas phase part 11a of the water tank 10a is the water surface, so it is an environment with high humidity. As the outside temperature changes, the temperature of the plate wall at the position of the gas phase part 11a drops below the dew point temperature of the gas phase part 11a, and condensation will occur on its surface.

[0004] like Figure 2 As shown, the high-humidity gas in the gas phase 11a contains chloride ions 14a, and these chloride ions will also enter the condensed water droplets 13a or water film along with condensation. The temperature changes constantly throughout the four seasons of the year, day and night, and thus, the occurrence of condensation and the disappearance of the water droplets 13a on the internal surface of the gas phase 11a will also occur simultaneously. However, when the condensed water droplets 13a or water film on the wall form, they will bring in the chloride ions 14a. However, when the water droplets 13a evaporate and disappear, some chloride ions 14a will remain on the wall. This cyclic change of dryness and wetness will cause the concentration of chloride ions 14a on the wall to gradually increase, that is, the concentration of chloride ions 14a will occur. It is this concentration process that causes the concentration of free chloride ions 14a on the wall of the gas phase 11a to reach the corrosion resistance limit of stainless steel, eventually causing corrosion of the gas phase 11a.

[0005] From the above analysis, we can see that the factors that lead to corrosion of the gas phase 11a can be summarized as follows: (1) the presence of chloride ions 14a; and (2) the concentration of chloride ions 14a on the wall caused by cyclic condensation. In other words, these two conditions are necessary for the corrosion of the gas phase 11a, and neither can be missing.

[0006] like Figure 3As shown in Figure 1, this image shows corrosion in the vapor phase portion 11a of a stainless steel S304 water tank 10a. The image shows that the corrosion occurs in a pitting pattern, gradually intensifying over time and eventually leading to perforation. To address this corrosion problem, some manufacturers use highly corrosion-resistant stainless steels such as S316 and 2205 to slow the corrosion process. However, completely preventing this corrosion phenomenon is extremely difficult and incurs high material costs. Summary of the Invention

[0007] Based on this, it is necessary to provide a water tank with no condensation in the gas phase and a control method thereof to address the deficiencies in the prior art.

[0008] The present invention provides a water tank with no condensation in the gas phase, comprising a water tank body, a temperature probe, a temperature and humidity probe, a system controller and an exhaust device. The water tank body is provided with a water tank surrounded by a plurality of plate walls for storing drinking water. The portion of the water tank near the top that never contacts water is the gas phase. The temperature and humidity probe is used to detect the temperature T and relative humidity RH inside the gas phase and feed back to the system controller. The temperature probe is used to detect the plate wall temperature TW at the gas phase position and feed back to the system controller. The system controller determines whether the working state of the exhaust device needs to be switched based on the detection data of the temperature and humidity probe, the detection data of the temperature probe and the current working state of the exhaust device, so that the exhaust device works intermittently, and at the same time the dew point temperature Td is controlled to always be lower than the plate wall temperature of the gas phase.

[0009] In one embodiment, the temperature and humidity probe extends from the outside of the water tank body into the gas phase part, the temperature probe contacts the plate wall of the gas phase part near the top, and the air inlet of the exhaust device is connected to an air intake pipe, which extends from the outside of the water tank body into the gas phase part.

[0010] In one embodiment, the water tank is installed indoors, the air outlet of the exhaust device is connected to an air outlet pipe, and the air outlet pipe is led to the outside of the room.

[0011] The present invention also provides a water tank control method for preventing condensation in the gas phase, comprising the following steps:

[0012] (1) Probe start-up: the system controller starts the temperature probe and the temperature and humidity probe according to the set time;

[0013] (2) Data acquisition: After the temperature probe and the temperature and humidity probe are started, the temperature and humidity probe detects the temperature T and relative humidity RH inside the gas phase and feeds back to the system controller; the temperature probe is used to detect the plate wall temperature TW at the gas phase position and feeds back to the system controller;

[0014] (3) Calculate the dew point temperature Td;

[0015] (4) Determine and adjust the working state switching, compare the dew point temperature and the wall temperature, and based on the comparison result and the current working state of the exhaust device, the system controller determines whether the working state of the exhaust device needs to be switched. If necessary, the system controller controls the exhaust device to adjust the working state to control the relative humidity RH of the gas phase and adjust the dew point temperature Td so that the dew point temperature Td is always controlled to be lower than the plate wall temperature TW of the gas phase.

[0016] In one embodiment, in step (3), when calculating the dew point temperature Td, the temperature T and the relative humidity RH are substituted into the following formula:

[0017] Td=(b*γ(T,RH)) / (a-γ(T,RH));

[0018] γ(T,RH)=Ln(RH / 100)+a*T / (b+T);

[0019] Among them, a=17.62b=243.12.

[0020] In one embodiment, the temperature and humidity probes are multi-point multi-probes, and the maximum value is taken after comparison of the temperature and humidity data; the temperature probes configured on the wall of the gas phase are multi-point multi-probes, and the minimum value is taken after comparison of the temperature data.

[0021] In one embodiment, in step (4), when the exhaust device is in the closed state:

[0022] If Td<TW-t1, do not issue any instructions and return;

[0023] If Td≥TW-t1, the system controller issues an instruction to start the exhaust device, starts the exhaust device, and causes the exhaust device to exhaust the gas phase to reduce the relative humidity RH of the gas phase.

[0024] In one embodiment, in step (4), when the exhaust device is in the open state:

[0025] If Td < TW-t2, the system controller issues a command to shut down the exhaust device, and the exhaust device stops working and enters the power saving mode;

[0026] If Td≥TW-t2, the system controller does not send any instructions and the exhaust device continues to work.

[0027] In one embodiment, the t1 value is 1.0°, and the t2 value is 6.0°.

[0028] In one embodiment, t1 and t2 are set in advance on the system controller.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention provides an exhaust device to forcibly exhaust the gas inside the gas phase, control the relative humidity RH, and then adjust the dew point temperature Td, so that the dew point temperature Td is always controlled to be lower than the wall temperature of the gas phase, eliminating the necessary conditions for condensation in the gas phase, avoiding the concentration of chloride ions and the corrosion of the water tank body, and having the characteristics of high reliability.

[0031] 2. The present invention further provides a temperature and humidity probe and a temperature probe. The temperature and humidity probe detects the temperature T and relative humidity RH inside the gas phase section. The temperature probe detects the wall temperature TW at the gas phase section and feeds back to the system controller. The system controller controls the exhaust device to work intermittently based on the detection data of the temperature and humidity probe and the detection data of the temperature probe to save electricity. It has the economical characteristics of low cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of traditional water tank equipment;

[0033] Figure 2 Schematic diagram of the formation of chloride ions on the plate wall in the gas phase;

[0034] Figure 3 This is a photo of the gas phase of the stainless steel S304 water tank after corrosion;

[0035] Figure 4 This is a schematic structural diagram of a water tank with no condensation in the gas phase portion of the present invention;

[0036] Figure 5 This is a control flow chart of a water tank control method for preventing condensation in the gas phase portion of the present invention;

[0037] Figure 6 This is a diagram showing the time series changes in the dew point temperature using the water tank control method for preventing condensation in the gas phase of the present invention. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0044] See also Figure 4 The present invention provides a water tank with a non-condensing vapor phase for storing drinking water. The water tank includes a water tank body 10, a temperature probe 30, a temperature and humidity probe 20, a system controller 50, and an exhaust device 40. The water tank body 10 includes a water tank surrounded by a plurality of panels for storing drinking water. The portion of the water tank near the top that is always not in contact with water is the vapor phase 11. The temperature and humidity probe 20 is used to detect the temperature T and relative humidity RH within the vapor phase 11 and feedback them to the system controller 50. The temperature probe 30 is used to detect the panel wall temperature TW at the vapor phase 11 and feedback them to the system controller 50. The system controller 50 determines whether the exhaust device 40's operating state needs to be switched based on the detection data from the temperature and humidity probe 20, the detection data from the temperature probe 30, and the current operating state of the exhaust device 40.

[0045] The water tank body 10 is provided with a manhole 13 for balancing the air pressure within the water tank. The temperature and humidity probe 20 extends from the outside of the water tank body 10 into the gas phase 11, and the temperature probe 30 contacts the top wall of the gas phase 11. The air inlet of the exhaust device 40 is connected to an air inlet pipe 61, which extends from the outside of the water tank body 10 into the gas phase 11.

[0046] In this embodiment, the water tank body 10 is installed indoors, the air outlet of the exhaust device 40 is connected to an air outlet pipe 62, and the air outlet pipe 62 is led to the outside to prevent the exhaust gas from carrying chloride ions 14 and causing corrosion on the outside of the side panel of the water tank body 10.

[0047] See also Figure 5 and Figure 6 The present invention also provides a method for controlling a water tank without condensation in the gas phase, which comprises the following steps:

[0048] (1) Start the temperature probe 30 and the temperature and humidity probe 20. The system controller 50 starts the temperature probe 30 and the temperature and humidity probe 20 according to a set time (such as 1 minute).

[0049] (2) Data acquisition: After starting the temperature probe 30 and the temperature and humidity probe 20, the temperature and humidity probe 20 detects the temperature T and relative humidity RH inside the gas phase section 11 and feeds back to the system controller 50. The temperature probe 30 is used to detect the plate wall temperature TW at the gas phase section 11 position and feeds back to the system controller 50.

[0050] (3) Calculate the dew point temperature Td. According to the condensation theory, the dew point temperature (Td) and the temperature T and relative humidity RH of the space in which it is located have the following relationship:

[0051] Td=(b*γ(T,RH)) / (a-γ(T,RH));

[0052] γ(T,RH)=Ln(RH / 100)+a*T / (b+T);

[0053] Among them, a=17.62b=243.12;

[0054] As can be seen from the above formula, at a constant temperature T, the lower the relative humidity RH, the lower the dew point temperature Td, at which condensation begins. Furthermore, during use, water regularly enters the water tank body 10, causing the water surface to churn. The humidity of the gas phase 11 within the water tank body 10 is always greater than the humidity of the external environment. In other words, the dew point temperature Td can be adjusted by controlling the relative humidity RH. If the dew point temperature Td is consistently kept below the wall temperature TW of the gas phase 11, condensation on the wall of the gas phase 11 can be avoided. Without condensation, there is no concentration of chloride ions 14 on the wall. Consequently, there is no high concentration of chloride ions 14 on the wall of the gas phase 11, and corrosion of the gas phase 11 is prevented.

[0055] In this embodiment, the temperature and humidity probe 20 is a multi-point multi-probe, and the maximum value is taken after comparison of the temperature and humidity data; the temperature probe 30 configured on the wall of the gas phase part 11 is a multi-point multi-probe, and the minimum value is taken after comparison of the temperature data.

[0056] (4) The working state switching is judged and adjusted. The dew point temperature and the wall temperature are compared. Based on the comparison result and the current working state of the exhaust device 40, the system controller 50 determines whether the working state of the exhaust device 40 needs to be switched. If necessary, the system controller 50 controls the exhaust device 40 to adjust the working state to control the relative humidity RH of the gas phase part 11, and then adjust the dew point temperature Td so that the dew point temperature Td is always controlled to be lower than the plate wall temperature TW of the gas phase part 11.

[0057] In step (4), when the exhaust device 40 is in the closed state:

[0058] If Td<TW-t1, do not issue any instructions and return;

[0059] If Td≥TW-t1, the system controller 50 issues an instruction to start the exhaust device 40, starts the exhaust device 40, and causes the exhaust device 40 to exhaust the gas phase portion 11, thereby reducing the relative humidity RH of the gas phase portion 11;

[0060] Here, t1 is the anti-condensation temperature control value set in advance on the system controller 50. This value ensures that the dew point temperature Td approaches the plate wall temperature TW of the gas phase section 11. The exhaust device 40 is activated before the dew point temperature Td reaches the upper limit (TW - t1) to prevent condensation. In this embodiment, the t1 value is 1.0°.

[0061] In step (4), when the exhaust device 40 is in the open state:

[0062] If Td < TW-t2, the system controller 50 issues a command to shut down the exhaust device 40, and the exhaust device 40 stops working and enters the power saving mode;

[0063] If Td≥TW-t2, the system controller 50 does not issue any command, and the exhaust device 40 continues to operate.

[0064] Here, t2 is a power-saving temperature control value set in advance on the system controller 50. When the dew point temperature Td reaches or falls below the lower limit of the dew point temperature (TW-t2), the exhaust device 40 stops operating to save power. In this embodiment, the t2 value is 6.0°.

[0065] The beneficial effects of the present invention are:

[0066] 1. The present invention provides an exhaust device 40 to forcibly exhaust the gas inside the gas phase portion 11, thereby controlling the relative humidity RH and further adjusting the dew point temperature Td. The dew point temperature Td is controlled to be always lower than the wall temperature of the gas phase portion 11. This eliminates the necessary conditions for condensation in the gas phase portion 11, prevents the concentration of chloride ions 14 and corrosion of the water tank body 10, and has the characteristic of high reliability.

[0067] 2. The present invention further provides a temperature and humidity probe 20 and a temperature probe 30. The temperature and humidity probe 20 detects the temperature T and relative humidity RH inside the gas phase section 11. The temperature probe 30 detects the plate wall temperature TW at the gas phase section 11 and feeds back the temperature to the system controller 50. The system controller 50 controls the intermittent operation of the exhaust device 40 according to the detection data of the temperature and humidity probe 20 and the detection data of the temperature probe 30 to save electricity. It has the economical characteristics of low cost and strong practicality.

[0068] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A water tank with a non-condensing gas phase, comprising a water tank body, wherein a water tank body is provided with a water tank formed by a plurality of plate walls inside the water tank body for storing drinking water, wherein the portion of the water tank that is close to the top and never contacts the water is the gas phase, characterized in that: It also includes a temperature probe, a temperature and humidity probe, a system controller and an exhaust device. The temperature and humidity probe is used to detect the temperature T and relative humidity RH inside the gas phase part and feed back to the system controller. The temperature probe is used to detect the wall temperature TW at the gas phase part and feed back to the system controller. The system controller determines whether it is necessary to switch the working state of the exhaust device based on the detection data of the temperature and humidity probe, the detection data of the temperature probe and the current working state of the exhaust device, so that the exhaust device works intermittently, and at the same time controls the dew point temperature Td to always be lower than the wall temperature of the gas phase part.

2. The water tank with no condensation in the gas phase according to claim 1, characterized in that: The temperature and humidity probe extends from the outside of the water tank body into the gas phase part, the temperature probe contacts the plate wall of the gas phase part near the top, the air inlet of the exhaust device is connected to an air inlet pipe, and the air inlet pipe extends from the outside of the water tank body into the gas phase part.

3. The water tank with no condensation in the gas phase according to claim 2, characterized in that: The water tank is installed indoors, the air outlet of the exhaust device is connected to an air outlet pipe, and the air outlet pipe is led to the outdoors.

4. A method for controlling a water tank with no condensation in the gas phase, applied to the water tank with no condensation in the gas phase according to any one of claims 1 to 3, characterized in that: The following steps are involved: (1) Probe start-up: the system controller starts the temperature probe and the temperature and humidity probe according to the set time; (2) Data acquisition: After the temperature probe and the temperature and humidity probe are started, the temperature and humidity probe detects the temperature T and relative humidity RH inside the gas phase and feeds back to the system controller; the temperature probe is used to detect the plate wall temperature TW at the gas phase position and feeds back to the system controller; (3) Calculate the dew point temperature Td; (4) Determine and adjust the working state switching, compare the dew point temperature and the wall temperature, and based on the comparison result and the current working state of the exhaust device, the system controller determines whether the working state of the exhaust device needs to be switched. If necessary, the system controller controls the exhaust device to adjust the working state to control the relative humidity RH of the gas phase and adjust the dew point temperature Td so that the dew point temperature Td is always controlled to be lower than the plate wall temperature TW of the gas phase.

5. The method for controlling a water tank without condensation in the gas phase according to claim 4, characterized in that: In step (3), when calculating the dew point temperature Td, substitute the temperature T and relative humidity RH into the following formula: Td=(b*γ(T,RH)) / (a-γ(T,RH)); γ(T,RH)=Ln(RH / 100)+a*T / (b+T); Among them, a=17.62b=243.

12.

6. The method for controlling a water tank without condensation in the gas phase according to claim 4, characterized in that: The temperature and humidity probes are multi-point multi-probes, and the maximum value is taken after comparison of the temperature and humidity data; the temperature probes configured on the wall of the gas phase part are multi-point multi-probes, and the minimum value is taken after comparison of the temperature data.

7. The method for controlling a water tank without condensation in the gas phase according to claim 4, characterized in that: In step (4), when the exhaust device is in the closed state: If Td<TW-t1, do not issue any instructions and return; If Td≥TW-t1, the system controller issues an instruction to start the exhaust device, starts the exhaust device, and causes the exhaust device to exhaust the gas phase to reduce the relative humidity RH of the gas phase.

8. The method for controlling a water tank without condensation in the gas phase according to claim 7, characterized in that: In step (4), when the exhaust device is in the open state: If Td < TW-t2, the system controller issues a command to shut down the exhaust device, and the exhaust device stops working and enters the power saving mode; If Td≥TW-t2, the system controller does not send any instructions and the exhaust device continues to work.

9. The method for controlling a water tank without condensation in the gas phase according to claim 8, characterized in that: The t1 value is 1.0°, and the t2 value is 6.0°.

10. The method for controlling a water tank without condensation in the gas phase according to claim 8, characterized in that: t1 and t2 are set in advance on the system controller.

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