Energy-saving dry dehumidification system

Abstract

The present invention relates to an energy-saving dry dehumidification system and, particularly, to an energy-saving dry dehumidification system capable of saving energy by optimally controlling the temperature of a regenerative heater. The energy-saving dry dehumidification system of the present invention is characterized in that, when the current dew point temperature value of a dry room measured by a first sensor is within a first reference range, which is a preset dew point temperature setting range value, a control unit lowers the temperature of the regenerative heater within a limit such that the current dew point temperature value of the dry room is within the first reference range, and when the indoor temperature of the dry room measured by a second sensor is at or below a lower limit of a second reference range, which is a preset indoor temperature range, the control unit increases the temperature of the regenerative heater such that the indoor temperature of the dry room is within the second reference range, regardless of the current dew point temperature value of the dry room.

Description

Energy-saving dry dehumidification system

[0001] The present invention relates to an energy-saving dry dehumidification system, and more particularly, to an energy-saving dry dehumidification system capable of saving energy by optimally controlling the temperature of a regenerative heater.

[0002] Recently, the demand for low-humidity environments has been increasing in the production process.

[0003] Low-humidity environments, i.e. dry atmospheres, are primarily used as environments for the manufacture of lithium-related batteries.

[0004] To improve the quality and yield of products manufactured in such a low-humidity environment, a dry room that maintains a certain atmosphere is employed.

[0005] In a broad sense, a dry room is a low-humidity room where the moisture content in the air is controlled below a certain value.

[0006] In particular, a room where the indoor dew point temperature is -10℃ or lower is called a dry room.

[0007] Dry rooms are distinguished from low-humidity rooms with relative humidity of 10% to 30%.

[0008] Dry rooms like this are used not only in lithium-related battery factories, but also in hygroscopic suture manufacturing processes, freeze-dried food companies, automotive environmental laboratories, and laboratories and factories requiring low-humidity conditions.

[0009] In conventional dry dehumidifiers, the regenerative heater is fixed at a temperature between 120℃ and 180℃, and the precooler operates with a fixed temperature setting for dehumidifying rotor performance within the dry room dew point temperature range.

[0010] The dew point temperature of the dry room changes due to the inflow of outside air according to the season and the increase in absolute humidity according to the number of people inside the dry room.

[0011] In the existing dehumidification method, the heating temperature of the regenerative heater is fixed and the temperatures of the precooler and return cooler are fixed, so the absolute humidity is reduced to the maximum value of the system and the system is operated continuously.

[0012] Because of this, the conventional dry dehumidification system had the disadvantage of causing an unnecessarily low dew point situation in the dry room, which ultimately resulted in unnecessarily high energy consumption.

[0013] The present invention is intended to solve the above-mentioned problem, and provides an energy-saving dry dehumidification system capable of lowering the temperature of a regenerative heater to the extent that the dew point temperature of a dry room is within a preset range to save energy, and raising the temperature of a regenerative heater so that the indoor temperature of the dry room falls below the preset range regardless of the dew point temperature of the dry room so that the indoor temperature of the dry room falls within the preset range.

[0014] In order to achieve the above object, the energy-saving dry dehumidification system of the present invention comprises: a dehumidifying rotor for supplying dehumidified air to a dry room; a supply fan for supplying air from the front to the rear of the dehumidifying rotor to allow the air to pass through the dehumidifying rotor; a regenerative heater for heating the air passing through the dehumidifying rotor and supplying the heated air to the dehumidifying rotor; a first sensor for measuring the dew point temperature of the dry room; a second sensor for measuring the indoor temperature of the dry room; a third sensor for measuring the current temperature of the regenerative heater; It is characterized in that it comprises a control unit that controls the regenerative heater; and when the current dew point temperature value of the dry room measured by the first sensor is within a first reference range that is a preset dew point temperature setting range value, the control unit lowers the temperature of the regenerative heater within a limit such that the current dew point temperature value of the dry room exists within the first reference range, and when the indoor temperature of the dry room measured by the second sensor is below a lower limit of a second reference range that is a preset indoor temperature range, the control unit raises the temperature of the regenerative heater so that the indoor temperature of the dry room exists within the second reference range regardless of the current dew point temperature value of the dry room.

[0015] The control unit comprises a first PID operation unit that inputs the current dew point temperature value of the dry room and the first reference range into a first PID operation unit that is set in advance to generate a temperature setting range value of the regenerative heater; and a second PID operation unit that inputs the temperature setting range value of the regenerative heater and the current temperature value of the regenerative heater into a second PID operation unit that is set in advance to generate an output value of the regenerative heater; wherein the control unit adjusts the temperature of the regenerative heater to be within the temperature setting range value of the regenerative heater by the output value of the regenerative heater generated by the second PID operation unit.

[0016] It further comprises a return cooler that cools the air discharged from the dry room and then resupplied to the supply fan; wherein, if the temperature of the dry room does not fall within the second reference range even though the temperature of the regenerative heater is increased to the maximum, the control unit adjusts the temperature of the air through the return cooler to cool the air supplied from the return cooler to the supply fan less, thereby further increasing the temperature of the air.

[0017] It further comprises a precooler arranged in front of the supply fan to cool air supplied from the outside and then supply it to the supply fan; wherein, if the temperature of the dry room does not fall within the second reference range even though the temperature of the return cooler is increased to the maximum, the control unit adjusts the temperature of the air through the precooler to cool the air supplied from the precooler to the supply fan less, thereby further increasing the temperature of the air.

[0018] The temperature setting range of the above regeneration heater is 0℃ to 180℃.

[0019] According to the energy-saving dry dehumidification system of the present invention as described above, the following effects are achieved.

[0020] According to the present invention, if the current dew point temperature value of the dry room measured by the first sensor is within a first reference range, which is a preset dew point temperature setting range value, the control unit lowers the temperature of the regenerative heater within a limit such that the current dew point temperature value of the dry room is within the first reference range, thereby efficiently reducing the energy required for the operation of the regenerative heater.

[0021] And, when the indoor temperature of the dry room measured by the second sensor is lower than the lower limit of the second reference range, which is a preset indoor temperature range, the control unit can prevent the indoor temperature of the dry room from falling below the second reference range by increasing the temperature of the regenerative heater so that the indoor temperature of the dry room falls within the second reference range regardless of the current dew point temperature value of the dry room.

[0022] Figure 1 is a drawing for explaining the dehumidification process of an energy-saving dry dehumidification system according to an embodiment of the present invention.

[0023] Figure 2 is a configuration diagram of an energy-saving dry dehumidification system according to an embodiment of the present invention.

[0024]

[0025] The energy-saving dry dehumidification system of the present invention comprises a dehumidification rotor (10), a supply fan (20), a regenerative heater (30), a first sensor (41), a second sensor (42), a third sensor (43), and a control unit (50), as shown in FIGS. 1 and 2.

[0026] The above dehumidifying rotor (10) supplies dehumidified air to the dry room (D).

[0027] The above dehumidifying rotor (10) is formed in a cylindrical shape and is a dry rotary dehumidifying method that rotates by external force.

[0028] The above dehumidifying rotor (10) is divided into a dehumidifying treatment area, a dehumidifying area, and a purge area based on the central axis.

[0029] The dehumidification treatment area dehumidifies the air.

[0030] The regeneration area removes the moisture absorbed in the dehumidification treatment area.

[0031] The fuzzy area adjusts the temperature appropriate for dehumidification so that dehumidification can be carried out smoothly in the dehumidification treatment area.

[0032] The air that has passed through the purge area is heated by the regeneration heater (30) and then passes through the regeneration area.

[0033] Since more specific details of the above-mentioned dehumidifying rotor (10) can be sufficiently described using conventionally known technology, a detailed description thereof will be omitted.

[0034] The above supply fan (20) supplies air from the front to the rear of the dehumidifying rotor (10) so that the air passes through the dehumidifying rotor (10).

[0035] Specifically, the supply fan (20) supplies external air to the dehumidification treatment area and purge area of ​​the dehumidification rotor (10).

[0036] The above regeneration heater (30) heats the air passing through the purge area of ​​the dehumidifying rotor (10) and supplies the heated air to the regeneration area of ​​the dehumidifying rotor (10).

[0037] That is, the air heated in the regeneration heater (30) passes through the regeneration area of ​​the dehumidifying rotor (10) and removes the moisture absorbed in the dehumidifying rotor (10).

[0038] The above first sensor (41) measures the dew point temperature of the dry room (D).

[0039] The above second sensor (42) measures the indoor temperature of the dry room (D).

[0040] The third sensor (43) measures the current temperature of the regenerative heater (30), i.e., the temperature of the air generated from the regenerative heater (30).

[0041] The above control unit (50) controls the above regenerative heater (30).

[0042] If the current dew point temperature value of the dry room (D) measured by the first sensor (41) is within the first reference range, which is a preset dew point temperature setting range value, the control unit (50) lowers the temperature of the regenerative heater (30) within the limit so that the current dew point temperature value of the dry room (D) exists within the first reference range.

[0043] For example, if the current dew point temperature value is -10°C and the first reference range is -5°C to -15°C, since the current dew point temperature value exists within the first reference range, the control unit (50) weakens the operation of the regenerative heater (30) to lower the heating temperature of the regenerative heater (30) so that the current dew point temperature value approaches the limit that allows the current dew point temperature value to exist within the first reference range, that is, -5°C.

[0044] As described above, when the heating temperature of the regeneration heater (30) is lowered, the air heated in the dehumidifying rotor (10) passes through the regeneration area of ​​the dehumidifying rotor (10) and removes less moisture absorbed in the dehumidifying rotor (10), and as a result, the current dew point temperature value of the dry room (D) rises and approaches -5°C, which is the limit value of the first reference range.

[0045] By weakening the operation of the regenerative heater (30) in this way to lower the heating temperature, there is no need to operate the regenerative heater (30) unnecessarily strongly, so that the energy required to operate the regenerative heater (30) can be saved.

[0046] And, when the indoor temperature of the dry room (D) measured by the second sensor (42) becomes lower than the lower limit of the second reference range, which is a preset indoor temperature range, the control unit (50) raises the temperature of the regenerative heater (30) so that the indoor temperature of the dry room (D) falls within the second reference range, regardless of the current dew point temperature value of the dry room (D).

[0047] For example, if the indoor temperature of the dry room (D) is 4°C and the second reference range is 5°C to 15°C, since the indoor temperature of the dry room (D) is below the lower limit of the second reference range, the control unit (50) strongly operates the regenerative heater (30) to increase the heating temperature of the regenerative heater (30) so that the current dew point temperature value falls within the first reference range of 5°C to 15°C, regardless of whether the current dew point temperature value of the dry room (D) is within the first reference range.

[0048] This is because the indoor temperature of the dry room (D) is more important than the current dew point temperature value of the dry room (D).

[0049] In order to implement the above operation, the control unit (50) includes a first PID operation unit (51) and a second PID operation unit (52).

[0050] The above first PID operation unit (51) inputs the current dew point temperature value of the dry room (D) measured by the first sensor (41) and the first reference range into the preset first PID operation to generate the temperature setting range value of the regenerative heater (30).

[0051] At this time, it is preferable that the temperature setting range of the regeneration heater (30) is 0℃ to 180℃.

[0052] Generating the temperature setting range value of the regenerative heater (30) by the above first PID operation means setting the temperature setting range value of the regenerative heater (30) to match the dew point temperature of the dry room (D). This can be sufficiently accomplished by utilizing a database through deep learning, etc., or by using an existing program, etc., so a detailed description thereof is omitted.

[0053] The first PID operation unit (51) inputs the temperature setting range value of the regenerative heater (30) generated by the first PID operation unit (51) and the current temperature value of the regenerative heater (30) measured by the third sensor (43) into a preset second PID operation unit to generate an output value of the regenerative heater (30).

[0054] Since generating the output value of the regenerative heater (30) by the above second PID operation is sufficient by utilizing a database through deep learning, etc., or by using an existing program, a detailed description thereof is omitted.

[0055] The above control unit (50) controls the temperature of the regenerative heater (30) to be within the temperature setting range of the regenerative heater (30) by the output value of the regenerative heater (30) generated by the second PID operation unit (52).

[0056] As described above, the control unit (50) can lower the heating temperature of the regenerative heater (30) within the limit that the current dew point temperature value of the dry room (D) exists within the first reference range, thereby reducing the energy required for the operation of the regenerative heater (30).

[0057] This embodiment can be further configured to include a return cooler (60) and a precooler (70).

[0058] The above return cooler (60) cools the air discharged from the above dry room (D) and then resupplies it to the above supply fan (20).

[0059] At this time, the return cooler (60) is composed of a damper, a filter, a cooling coil, etc.

[0060] Accordingly, the return cooler (60) can control the temperature of the air passing through the return cooler (60) by controlling the temperature of the cooling coil.

[0061] The above precooler (70) is placed in front of the supply fan (20) and cools the air supplied from the outside and then supplies it to the supply fan (20).

[0062] At this time, the precooler (70) is configured to include a damper, a filter, a heating coil, a cooling coil, a moisture barrier, etc. inside.

[0063] The temperature of the outside air decreases as it passes through the heating coil and cooling coil.

[0064] Since the specific structures of the above return cooler (60) and precooler (70) are the same as those of conventionally known structures, a detailed description thereof is omitted.

[0065] Meanwhile, if the temperature of the dry room (D) does not fall within the second reference range even though the temperature of the regeneration heater (30) is increased to the maximum, the control unit (50) adjusts the temperature of the air through the return cooler (60) to cool the air supplied from the return cooler (60) to the supply fan (20) less, thereby further increasing the temperature of the air.

[0066] Through this, the temperature of the above dry room (D) is ensured to fall within the above second reference range.

[0067] If, even though the temperature of the return cooler (60) is increased to the maximum, the temperature of the dry room (D) does not fall within the second reference range, the control unit (50) adjusts the temperature of the air through the precooler (70) to cool the air supplied from the precooler (70) to the supply fan (20) less, thereby further increasing the temperature of the air.

[0068] In the present invention, the return cooler (60) and precooler (70) are different from the conventional ones in that their temperatures are controlled by the control unit (50).

[0069] As described above, the present invention can reduce unnecessary energy by controlling the temperature of a regenerative heater (30) or the like in a dry dehumidification system through a multi-stage cascade control method.

[0070] The energy-saving dry dehumidification system of the present invention is not limited to the above-described embodiment, and can be implemented with various modifications within the scope permitted by the technical concept of the present invention.

[0071] The present invention can be applied to a dry dehumidification system and has industrial applicability.

Claims

1. A dehumidifying rotor that supplies dehumidified air to the dry room; A supply fan that supplies air from the front to the rear of the dehumidifying rotor so that the air passes through the dehumidifying rotor; A regenerative heater that heats the air passing through the dehumidifying rotor and supplies the heated air to the dehumidifying rotor; A first sensor for measuring the dew point temperature of the above dry room; A second sensor for measuring the indoor temperature of the above dry room; A third sensor for measuring the current temperature of the above-mentioned regenerative heater; It comprises a control unit that controls the above-mentioned regenerative heater; If the current dew point temperature value of the dry room measured by the first sensor is within the first reference range, which is a preset dew point temperature setting range value, the control unit lowers the temperature of the regenerative heater within the limit so that the current dew point temperature value of the dry room is within the first reference range. When the indoor temperature of the dry room measured by the second sensor is below the lower limit of the second reference range, which is a preset indoor temperature range, the control unit increases the temperature of the regenerative heater so that the indoor temperature of the dry room falls within the second reference range, regardless of the current dew point temperature value of the dry room. The above control unit, A first PID operation unit that inputs the current dew point temperature value of the dry room and the first reference range into a preset first PID operation to generate a temperature setting range value of the regenerative heater; It comprises a second PID operation unit that inputs the temperature setting range value of the regenerative heater and the current temperature value of the regenerative heater into a preset second PID operation to generate an output value of the regenerative heater; An energy-saving dry dehumidification system characterized in that the control unit adjusts the temperature of the regenerative heater to be within the temperature setting range of the regenerative heater by the output value of the regenerative heater generated by the second PID operation unit.

2. In claim 1, It further comprises a return cooler that cools the air discharged from the above dry room and then resupplies it to the above supply fan; An energy-saving dry dehumidification system characterized in that, if the temperature of the dry room does not fall within the second reference range even though the control unit has increased the temperature of the regenerative heater to the maximum, the temperature of the air through the return cooler is adjusted to cool the air supplied from the return cooler to the supply fan less, thereby further increasing the temperature of the air.

3. In claim 2, It further comprises a precooler arranged in front of the supply fan to cool the air supplied from the outside and then supply it to the supply fan; An energy-saving dry dehumidification system characterized in that, if the temperature of the dry room does not fall within the second reference range even though the control unit has increased the temperature of the return cooler to the maximum, the temperature of the air through the precooler is adjusted to cool the air supplied from the precooler to the supply fan less, thereby further increasing the temperature of the air.

4. In claim 1, An energy-saving dry dehumidification system characterized in that the temperature setting range of the above-mentioned regenerative heater is 0℃ to 180℃.

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