A condensation-type air purifier that adjusts humidity before cooling.

Abstract

This invention provides a highly efficient and high-performance condensation-type air purifier by suppressing the generation of liquid particles in the air immediately before cooling, which significantly impacts efficiency. [Solution] By controlling spraying, heating, and airflow using sensors, etc., it is possible to maximize the amount of water vapor in the air immediately before cooling and minimize the amount of liquid particles.

Description

Technical Field

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[0001] The present invention relates to a condensation type air purifier.

Background Art

[0002] When air is cooled, water vapor condenses using solid particles or liquid particles as condensation nuclei. By this action, dust particles can be separated from the air.

[0003] When there is little water vapor in the air, the condensation efficiency is poor, so there is a mechanism for pre-spraying (Patent Document 1).

[0004] There is one patent document including the words "air purification", "condensation", and "heating", but it does not perform spraying as a pre-process of condensation (Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0008] According to the present invention, dust particles can be used as condensation nuclei with minimal spraying, and a condensation-type air purifier is provided that is highly efficient, performs well, and is energy-efficient. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view of a condensation-type air purifier according to one embodiment of the present invention. [Figure 2] This is a flowchart illustrating the control of a condensation-type air purifier according to one embodiment of the present invention. [Modes for carrying out the invention]

[0010] When air is cooled and water vapor condenses, if there are unvaporized liquid particles present, these also act as condensation nuclei, preventing dust particles from efficiently serving as condensation nuclei. By controlling spraying, heating, and airflow, the amount of water vapor in the air immediately before cooling is maximized and the amount of liquid particles is minimized.

[0011] While the primary purpose of this invention is air purification, it can be used for the general removal of solid and liquid particles suspended in gases. For example, it can be used to remove oil particles by spraying alcohol into gaseous nitrogen.

[0012] While the primary purpose of this invention is air purification, it can also be used for sampling solid and liquid particles suspended in gases.

[0013] The present invention will be described as an embodiment with reference to the drawings. The embodiments shown below are merely illustrative, and there is no intention to exclude various modifications or applications of techniques not explicitly shown in the embodiments below.

[0014] Figure 1 is a cross-sectional view of a condensation-type air purifier according to one embodiment of the present invention.

[0015] (1) In Figure 1, the Peltier element 3 is installed sandwiched within a housing 1 which has a U-shaped airflow channel, and the Peltier element 3 is connected to a heating heat sink 4 and a cooling heat sink 5 installed within the airflow channel. (2) Inlet blowers 6 and outlet blowers 7 are installed at the two openings of the housing 1, and are driven so that the heating heat sink 4 is on the upstream side and the cooling heat sink 5 is on the downstream side, taking in outside air and discharging it through the gas flow path of the housing 1. (3) A sprayer 2 is installed near the heating heat sink 4, and water is obtained from the water supply tank 21 via the water supply tube 22 and sprayed onto the heating heat sink 4. (4) A drain tank 23 is installed at the bottom of the cooling heat sink 5 to collect the condensed liquid. (5) An inlet temperature sensor 11 is installed near the inlet blower 6, and an intermediate temperature sensor 12 and an intermediate humidity sensor 13 are installed in the middle of the heating heat sink 4 and the cooling heat sink 5. (6) The drive circuit 14 is electrically connected to the sprayer 2, the Peltier element 3, the inlet blower 6, and the outlet blower 7. (7) The control unit 15 is electrically connected to the drive circuit 14, the inlet temperature sensor 11, the intermediate temperature sensor 12, and the intermediate humidity sensor 13.

[0016] (1) In Figure 1, when the Peltier element 3 is activated, the heating heatsink 4 is heated and the cooling heatsink 5 is cooled. (2) The outside air taken in by the inlet blower 6 is humidified by spraying and heating in the sprayer 2 and heating heat sink 4. (3) When the humidified gas reaches the cooling section heat sink 5, water vapor condenses around the dust particles and can be separated from the gas. (4) The condensed liquid is collected in the drainage tank 23, and the gas is released by the outlet blower 7.

[0017] In FIG. 1, thermal energy transfers to the water vapor atomized from the heating heat sink 4 and vaporized, and circulates to the heating heat sink 4 via the cooling heat sink 5 and the Peltier element 3. Therefore, the energy efficiency is high.

[0018] (1) In order to efficiently use dust particles as condensation nuclei, it is necessary to maximize the amount of water vapor in the humidified gas by spraying and heating and minimize the amount of liquid particles. (2) For this purpose, the balance of spraying, heating, and blowing is important. (3) When using a Peltier element, since the heating capacity is overwhelmingly smaller compared to spraying and blowing, spraying and blowing need to be adjusted. (4) The target humidity after spraying and heating is described as 95% for convenience.

[0019] (1) In FIG. 1, when the control unit 15 is commanded to operate by an external signal or the driver, the control unit 15 drives the Peltier element 3 at full power in the drive circuit 14. (2) Similarly, the atomizer 2, the inlet blower 6, and the outlet blower 7 are driven with preset default values (FIG. 2, step S1). (3) The control unit 15 acquires the measured values of the middle humidity sensor 13, the middle temperature sensor 12, and the inlet temperature sensor 11 (FIG. 2 step S2). (4) When the value of the middle humidity sensor 13 is higher than 95% and the value of the middle temperature sensor 12 is greater than the value of the inlet temperature sensor 11, it can be determined that there is room for heating. Therefore, the control unit rises the operation of the atomizer 2, the inlet blower 6, and the outlet blower 7 (FIG. 2 steps S3, 4, 7). (5) When the humidity is higher than 95% and the temperatures of the middle part and the inlet part are the same, it can be determined that there is room for spraying and heating. Therefore, the operation of the inlet blower 6 and the outlet blower 7 is increased (FIG. 2 steps S3, 4, 8). (6) When the humidity is higher than 95% and the temperature of the middle part is lower than that of the inlet part, it can be determined that the spraying is excessive. Therefore, the operation of the atomizer 2 is reduced (FIG. 2 steps S3, 4, 9). (7) When the humidity is 95% and the temperature in the middle section is higher than that in the inlet section, it can be determined that there is surplus heating capacity, so the operation of the sprayer 2, the inlet blower 6, and the outlet blower 7 is increased (Figure 2, steps S3, 5, 10). (8) When the humidity is 95% and the temperature of the intermediate section and the inlet section are the same, the target condition can be determined, and the current operation will be maintained (Figure 2, steps S3, 5, 11). (9) If the humidity is 95% and the temperature in the middle section is lower than that in the inlet section, it can be determined that heating is insufficient, so the operation of the sprayer 2, the inlet blower 6, and the outlet blower 7 is reduced (Figure 2, steps S3, 5, 12). (10) If the humidity is lower than 95% and the temperature in the middle section is higher than that in the inlet section, it can be determined that there is insufficient spraying, so the operation of sprayer 2 is increased (Figure 2, steps S3, 6, 13). (11) If the humidity is lower than 95% and the temperature in the middle section and the inlet section are the same, it can be determined that the airflow is excessive, so the operation of the inlet fan 6 and the outlet fan 7 is reduced (Figure 2, steps S3, 6, 14). (12) If the humidity is lower than 95% and the temperature in the middle section is lower than that in the inlet section, it can be determined that heating is insufficient, so the operation of the sprayer 2, the inlet blower 6, and the outlet blower 7 is reduced (Figure 2, steps S3, 6, 15). (13) After changing the operation, the control unit 15 acquires the measured values ​​from the intermediate humidity sensor 13, the intermediate temperature sensor 12, and the inlet temperature sensor 11 (Figure 2, step S2). [Explanation of Symbols]

[0020] 1 cabinet 2 sprayer 3 Peltier element 4. Heating heatsink 5. Cooling heatsink 6. Inlet fan 7 Outlet blower 11. Inlet temperature sensor 12. Intermediate temperature sensor 13. Intermediate humidity sensor 14. Drive Circuit 15 Control Unit 21 Water tank 22 Water supply tube 23 Drainage tank

Claims

[Claim 1] A condensation-type air purifier that humidifies an introduced gas and cools the humidified gas to separate solid particles in the gas by condensation, A housing that forms an air passage, A blower that transports the gas along the flow path, A heating heat sink installed on the upstream side of the aforementioned flow path, A cooling heat sink installed on the downstream side of the aforementioned flow path, The heating heat sink and the Peltier element connected to the cooling heat sink, A sprayer is installed nearby so that water can be sprayed onto the aforementioned heating heat sink, An inlet temperature sensor is positioned near the inlet of the aforementioned flow path, An intermediate temperature sensor and an intermediate humidity sensor are positioned in the intermediate portion between the heating heat sink and the cooling heat sink within the flow path. The system includes a control unit that controls the operation of the sprayer and the blower, The control unit adjusts the operation of the sprayer and the blower based on at least the comparison result of the measurements of the inlet temperature sensor and the intermediate temperature sensor, and the measurement value of the intermediate humidity sensor, so that the measurement value of the intermediate humidity sensor becomes the set target humidity. When the measurement value of the intermediate humidity sensor is higher than the target humidity, and the measurement value of the intermediate temperature sensor is lower than the measurement value of the inlet temperature sensor, the spray volume of the sprayer is reduced. When the measurement value of the intermediate humidity sensor is higher than the target humidity, and when the measurement value of the intermediate temperature sensor is higher than the measurement value of the inlet temperature sensor, the spray volume of the sprayer and the airflow of the blower are increased. When the measurement value of the intermediate humidity sensor is lower than the target humidity, and when the measurement value of the intermediate temperature sensor is greater than the measurement value of the inlet temperature sensor, the spray volume of the sprayer is increased. A condensation-type air purifier characterized in that when the measured value of the intermediate humidity sensor is lower than the target humidity, or when the measured value of the intermediate temperature sensor is lower than the measured value of the inlet temperature sensor, the spray volume of the sprayer and the airflow volume of the blower are reduced.

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