A desktop air purification and sterilization device

Abstract

The present invention relates to the technical field of air purification equipment, and discloses a desktop air purification and sterilization device. When the pre-detector senses that the air humidity is greater than a first threshold, it triggers the semiconductor refrigeration sheet to be powered on. When the pre-detector senses that the particulate matter content is greater than a second threshold, it triggers the ultrasonic atomizer to introduce water vapor into the pretreatment chamber. Before the gas is treated by the electrostatic precipitation module, the water vapor in the air is removed by the semiconductor refrigeration sheet and the cold plate first to reduce the air humidity, so that the effect of the electrostatic precipitation module in sterilization and dust removal is better. At the same time, the semiconductor refrigeration sheet and the cold plate can play a role in adjusting the temperature of the discharged gas, thereby adjusting the indoor temperature. Secondly, under the action of the cold plate and the ultrasonic atomizer, when the dust content of the inflowing gas is too high, the inflowing gas is pre-dusted first to ensure that the dust content of the gas entering the electrostatic precipitation module tends to be consistent.

Description

Technical Field

[0001] The present invention relates to the technical field of purification equipment, and particularly to a desktop air purification and sterilization device. Background Art

[0002] Using static electricity for dust removal and sterilization is the main working mode of current air purification devices. Compared with other dust removal and sterilization methods, air purifiers using static electricity for dust removal and sterilization can basically achieve no consumables, reduce the use cost, and the daily operation is relatively convenient.

[0003] Generally speaking, during static electricity dust removal, the tip electrode discharges to kill germs, and at the same time ionizes the particles in the air, making the particles carry charges. The dust collection electrode adsorbs the charged particles to complete the main dust removal and sterilization work. However, when the air humidity is too high, the insulation of the air decreases, the charges of the particles are easily transferred, the charging ability of the particles decreases, and the adsorption effect of the dust collection electrode is weakened. And the situation of high air humidity in the house occurs from time to time. Daily situations such as just finishing mopping the floor and continuous operation of the air humidifier will cause the air humidity in the house to be too high, reducing the working efficiency of the air purifier.

[0004] Secondly, many times, a large amount of dust will be generated indoors. For example, during indoor cleaning, kitchen fumes, and ventilation through windows, a large amount of particulate matter will be generated in the air. After the air purifier adsorbs these particulate matters, the particulate matters accumulated near the electrode will increase suddenly. On the one hand, it greatly shortens the cleaning cycle of the air purifier, additionally increasing the burden on the user. On the other hand, the cleaning cycle becomes extremely irregular and difficult to predict, making it impossible for the user to clean the filter screen in time and reducing its working effect. Summary of the Invention

[0005] In view of the deficiencies of the above background art, the present invention provides a technical solution for a desktop air purification and sterilization device. Before the gas is processed by the electrostatic dust removal module, the water vapor in the air is removed by a semiconductor refrigeration sheet and a cold plate to reduce the air humidity, so that the electrostatic dust removal module has a better effect of sterilization and dust removal. At the same time, the semiconductor refrigeration sheet and the cold plate can play a role in adjusting the temperature of the discharged gas, thereby adjusting the indoor temperature. Secondly, under the action of the cold plate and the ultrasonic atomizer, when the dust content of the inflowing gas is too high, the inflowing gas is pre-dusted first to ensure that the dust content of the gas entering the electrostatic dust removal module tends to be consistent, solving the problems raised in the background art.

[0006] The present invention provides the following technical solution: A desktop air purification and sterilization device, including a housing and a fan. A pretreatment chamber and a working chamber are provided inside the housing. An electrostatic precipitation module is provided in the working chamber. An exhaust port is communicated with one side of the working chamber. An air inlet is provided on one side of the pretreatment chamber. A pre-detector is provided in the pretreatment chamber, and the pre-detector is used to detect the humidity and particulate matter content of the incoming gas. The fan is used to draw external air into the pretreatment chamber and discharge the gas from the exhaust port.

[0007] An intermediate chamber is provided between the pretreatment chamber and the working chamber. A semiconductor refrigeration sheet is provided in the pretreatment chamber. A cold plate and a heat sink are respectively arranged at the cold end and the hot end of the semiconductor refrigeration sheet. The cold plate is arranged in the pretreatment chamber. The air inlet forms an angle with the air flow direction. The heat sink is arranged in the intermediate chamber. An ultrasonic atomizer is provided inside the housing. The ultrasonic atomizer is communicated with a water tank. The ultrasonic atomizer is provided with an air outlet in the pretreatment chamber, and the position of the air outlet is upstream of the cold plate.

[0008] When the pre-detector senses that the air humidity is greater than a first threshold, it triggers the semiconductor refrigeration sheet to be powered on. When the pre-detector senses that the particulate matter content is greater than a second threshold, it triggers the ultrasonic atomizer to introduce water vapor into the pretreatment chamber.

[0009] Preferably, the exhaust port and the air inlet are arranged on the same side. The intermediate chamber has two layers, and the heat sink is arranged in the layer closer to the pretreatment chamber.

[0010] Preferably, a heating wire is provided in the upper layer of the intermediate chamber.

[0011] Preferably, a rotatable shutter is provided on the side of the pretreatment chamber, the working chamber and the intermediate chamber facing away from the air inlet. The shutter has two working positions. When the shutter is in the second working position, the pretreatment chamber is communicated with the working chamber through the intermediate chamber. When the shutter is in the first working position, the pretreatment chamber is directly communicated with the working chamber.

[0012] Preferably, the shutter switches to the second working position when the semiconductor refrigeration sheet or the ultrasonic atomizer is working, and switches to the first working position when the semiconductor refrigeration sheet and the ultrasonic atomizer are not working. The shutter can be manually switched between working positions.

[0013] Preferably, the intermediate chamber is inclined, and the side closer to the ultrasonic atomizer is the lower side. The water tank is provided with a water outlet on the side of the heat sink away from the ultrasonic atomizer. The shutter switches to the first working position when the water tank is triggered to drip water into the intermediate chamber.

[0014] Preferably, the cold plate is an arc with a gradually decreasing diameter along the air flow direction, and a vertical protrusion is provided at the tail of the cold plate.

[0015] Preferably, a liftable blocking curtain is provided in the pretreatment chamber. The blocking curtain is perpendicular to the air flow direction and rises when the ultrasonic atomizer injects water vapor into the pretreatment chamber.

[0016] Preferably, a drawer is provided at the bottom of the pretreatment chamber, and absorbent cotton is arranged in the drawer.

[0017] Preferably, the interval between the two radiators is smaller than the interval between the two cold plates, and the height of the radiator is smaller than the height of the cold plate.

[0018] The present invention has the following beneficial effects:

[0019] 1. For this desktop air purification and sterilization device, before the gas is processed by the electrostatic precipitation module, the water vapor in the air is removed by the semiconductor refrigeration sheet and the cold plate first, reducing the air humidity, so that the electrostatic precipitation module has a better effect of sterilization and dust removal. At the same time, the semiconductor refrigeration sheet and the cold plate can play a role in adjusting the temperature of the discharged gas, and then adjust the indoor temperature.

[0020] 2. For this desktop air purification and sterilization device, under the action of the cold plate and the ultrasonic atomizer, when the dust content of the inflowing gas is too high, the inflowing gas is pre-dedusted first, ensuring that the dust content of the gas entering the electrostatic precipitation module tends to be consistent. On the one hand, the cleaning cycle of the purifier is reduced, reducing the burden on the user. On the other hand, the cleaning cycle is more stable, which is conducive to the timely cleaning of the purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 is a front view of the present invention;

[0023] Figure 3 is a bottom view of the cold plate in the present invention;

[0024] Figure 4 is a top view of the radiator in the present invention.

[0025] In the figure: 1. Housing; 2. Pretreatment chamber; 3. Working chamber; 4. Electrostatic precipitation module; 5. Exhaust port; 6. Intake port; 7. Pre-detector; 8. Semiconductor refrigeration sheet; 9. Cold plate; 10. Fan; 11. Intermediate chamber; 12. Radiator; 13. Ultrasonic atomizer; 14. Water tank; 15. Gate; 16. Blocking curtain; 17. Drawer. DETAILED DESCRIPTION OF THE INVENTION

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 and Figure 2 , Figure 2 Omitting the cover plate, a desktop air purification and sterilization device includes a housing 1 and a fan 10. A pretreatment chamber 2 and a working chamber 3 are provided in the housing 1. The pretreatment chamber 2 and the working chamber 3 can be arranged left and right or up and down. In this embodiment, the working chamber 3 is provided above the pretreatment chamber 2. An electrostatic precipitation module 4 is provided in the working chamber 3. The electrostatic precipitation module 4 includes an ionization and ESP net, a photocatalyst plate, and an ultraviolet lamp. The ultraviolet lamp is provided in the middle of the two photocatalyst plates. The electrostatic precipitation element and the photocatalyst plate are made in the form of an insertion plate and are inserted from the upper end of the working chamber 3. A slot is provided on the inner side of the working chamber 3. An exhaust port 5 is communicated with one side of the working chamber 3. The air processed by the electrostatic precipitation module 4 is discharged into the room through the exhaust port 5. An air inlet 6 is provided on one side of the pretreatment chamber 2. A pre-detector 7 is provided in the pretreatment chamber 2. The pre-detector 7 is provided near the air inlet 6. The pre-detector 7 is used to detect the humidity and particulate matter content of the incoming gas. A coarse filter screen is provided on the air inlet 6 to filter out too large foreign objects. The fan 10 is used to draw external air into the pretreatment chamber 2 and discharge the gas from the exhaust port 5;

[0028] An intermediate chamber 11 is provided between the pretreatment chamber 2 and the working chamber 3. A semiconductor refrigeration sheet 8 is provided in the pretreatment chamber 2. A cold plate 9 and a heat sink 12 are respectively arranged at the cold end and the hot end of the semiconductor refrigeration sheet 8. The cold plate 9 is provided in the pretreatment chamber 2. The air inlet 6 forms an angle with the air flow direction to ensure sufficient contact between the gas and the cold plate 9. When the gas contacts the cold plate 9, due to the temperature difference, water vapor liquefies and adheres to the cold plate 9, removing the moisture in the air. The heat sink 12 is provided in the intermediate chamber 11. The heat sink 12 is parallel to the gas flow direction. An ultrasonic atomizer 13 is provided in the housing 1. The ultrasonic atomizer 13 is communicated with a water tank 14. The water stored in the water tank 14 flows into the ultrasonic atomizer 13. The ultrasonic atomizer 13 atomizes it. The ultrasonic atomizer 13 has two air outlets. One air outlet is provided in the exhaust port 5, and the other air outlet is provided in the pretreatment chamber 2 and is located upstream of the cold plate 9;

[0029] The pre-detector 7 is connected to a controller. When the pre-detector 7 senses that the air humidity is greater than a first threshold value, it triggers the semiconductor refrigeration sheet 8 to be energized, and the temperature of the cold plate 9 decreases, generating a large temperature difference with the room temperature, causing a large amount of water vapor in the flowing air to liquefy. When the pre-detector 7 senses that the particulate matter content is greater than a second threshold value, it triggers the ultrasonic atomizer 13 to introduce water vapor into the pretreatment chamber 2. The water droplets adhere to the particles and finally adhere to the cold plate 9, reducing the amount of particles in the air, and then enter the working chamber 3 for further sterilization and dust removal.

[0030] The exhaust port 5 and the air inlet 6 are arranged on the same side. The intermediate chamber 11 has two layers. The heat sink 12 is arranged on the layer close to the pretreatment chamber 2. Since the cold plate 9 and the heat sink 12 are in the same horizontal position, the gas needs to return to contact the heat sink 12 to be heated up. The other layer guides the gas to fold back and enter the working chamber 3, so as to ensure that the exhaust port 5 and the air inlet 6 are on the same side. The same side of the exhaust port 5 and the air inlet 6 is convenient for the ultrasonic atomizer 13 and its air outlet to be arranged. The ultrasonic atomizer 13 is provided with a switching valve for selecting one of the two air outlets to communicate. In order to avoid interference between the inlet and the outlet, the exhaust port 5 faces upward and the air inlet 6 faces horizontally.

[0031] The upper layer of the intermediate chamber 11 is provided with a heating wire (the heating wire is omitted in the figure). In winter, auxiliary heating is carried out to make the blown gas be hot air.

[0032] On the side of the pretreatment chamber 2, the working chamber 3 and the intermediate chamber 11 facing away from the air inlet 6, there is a rotatable shutter 15. The shutter 15 has two working positions. When the shutter 15 is in the second working position, the pretreatment chamber 2 is communicated with the working chamber 3 through the intermediate chamber 11. When the shutter 15 is in the first working position, the pretreatment chamber 2 is directly communicated with the working chamber 3. The shutter 15 switches to the second working position when the semiconductor refrigeration sheet 8 or the ultrasonic atomizer 13 is working. In summer, it can be set to the summer mode. At this time, when the semiconductor refrigeration sheet 8 is working, it is in the first working position. When the semiconductor refrigeration sheet 8 and the ultrasonic atomizer 13 are not working, it switches to the first working position to reduce the resistance of air flow and reduce energy consumption. In this embodiment, the partition in the heat sink 12 is provided with an opening, and the shutter 15 is provided with an opening side. When in the first working position, that is, the vertical state, the upper layer channel is closed, and the gas directly enters the working chamber 3 from the opening. When in the second working position, that is, the horizontal state, the opening is closed, and the gas enters the working chamber 3 through the intermediate chamber 11. The fan 10 is arranged at the bottom of the opening to draw the gas in the pretreatment chamber 2 into the intermediate chamber 11 or the working chamber 3. The shutter 15 can switch the working position under the drive of the motor and can also adjust the working position through the knob.

[0033] The intermediate cavity 11 is inclined, with the side closer to the ultrasonic atomizer 13 being the lower side. The water tank 14 has a water outlet on the side of the heat sink 12 away from the ultrasonic atomizer 13. The middle partition of the intermediate cavity 11 is hollow, and there are drip holes on the side away from the ultrasonic atomizer 13. The water tank 14 is connected to the middle partition of the intermediate cavity 11. Water drips from the partition of the heat sink 12 onto the heat sink 12 to cool the heat sink 12, enabling the cold plate 9 to be at a lower temperature and cool the gas. When the water tank 14 triggers to drip water into the intermediate cavity 11, the shutter 15 switches to the first working position. The cooled gas flows directly into the working cavity 3 without being heated, and the gas discharged from the exhaust port 5 is the cooled gas, which is applicable in summer.

[0034] Please refer to Figure 3 , the cold plate 9 is an arc with a gradually decreasing diameter along the air flow direction. As the air flows, the pressure between the air and the cold plate 9 gradually increases. The heavier liquid flows along the cold plate 9. There is a protrusion at the tail of the cold plate 9, which is vertically downward. The liquid is blocked and falls at the tail, separating from the gas.

[0035] Please refer to Figure 1 and Figure 2 , there is a liftable blocking curtain 16 in the pretreatment chamber 2. The blocking curtain 16 is perpendicular to the air flow direction. The blocking curtain 16 rises when the ultrasonic atomizer 13 passes water vapor into the pretreatment chamber 2. After passing the water vapor, the blocking curtain 16 rises to block part of the space. At the same time, the operating power of the fan 10 is increased, making the air flow velocity in the pretreatment chamber 2 faster, increasing the centrifugal force, and enhancing the ability to separate the liquid water.

[0036] There is a drawer 17 at the bottom of the pretreatment chamber 2. Absorbent cotton is arranged in the drawer 17 to adsorb the liquid water and at the same time reduce the vaporization rate of the remaining water in the pretreatment chamber 2. The absorbent cotton is regularly removed for cleaning.

[0037] Please refer to Figure 3 and Figure 4 , the interval between the two heat sinks 12 is smaller than the interval between the two cold plates 9. The cold plate 9 liquefies the gas using the temperature difference. Therefore, the interval is set larger to prevent the gas between the intervals from being quickly assimilated by the cold plate 9, facilitating maintaining an appropriate temperature difference before contact. The heat sink 12 is used for heating, and the interval is set smaller. The height of the heat sink 12 is less than the height of the cold plate 9. The heat sink 12 has a small height, and the temperature change along the height is small, making the heating more uniform.

[0038] The working principle and working process of the present invention:

[0039] Gas enters the pretreatment chamber 2 from the air inlet 6, and the pre-detector 7 detects the incoming gas. If excessive humidity is detected, the semiconductor refrigeration sheet 8 is triggered to be powered on, and the temperature of the cold plate 9 decreases, generating a significant temperature difference with the ambient temperature. When the air flow passes through the cold plate 9, it liquefies under the action of the temperature difference. The liquid is blocked by the protrusions and falls, and is absorbed by the absorbent cotton at the bottom.

[0040] When the summer mode is selected, the air with moisture removed directly enters the working chamber 3, and after being processed by the electrostatic precipitation module 4, it is discharged. At the same time, the water in the water tank 14 enters the intermediate chamber 11, flows along the bottom of the intermediate chamber 11 into the ultrasonic atomizer 13, cools the hot end of the semiconductor refrigeration sheet 8, and at the same time, the ultrasonic atomizer 13 generates gas droplets, which flow into the exhaust port 5 to heat the discharged gas.

[0041] When the summer mode is not selected, the air with moisture removed flows into the working chamber 3 through the intermediate chamber 11, and is heated by the heat sink 12 when flowing through the heat sink 12, and the gas or hot air at the ambient temperature is discharged.

[0042] When the pre-detector 7 detects that the dust content is too high, it enters the dust reduction mode. The shutter 15 is in the second working position, and the ultrasonic atomizer 13 is connected to the pretreatment chamber 2. The gas entering through the air inlet 6 is wetted by the liquid water sprayed by the ultrasonic atomizer 13. The liquid water droplets adsorb particles and aggregate with each other to become larger in volume. When flowing along the cold plate 9, they adhere to the surface of the cold plate 9 under the centrifugal force and are blocked by the protrusions, achieving dust reduction and rapidly reducing the indoor dust. Although the humidity of the gas passing through the cold plate 9 for dust reduction increases and the insulation performance decreases, it will not increase the pollutants adsorbed by the electrostatic precipitation module 4, and the pollutants filtered out and remaining by the electrostatic precipitation module 4 increase at a stable rate.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A desktop air purification and sterilization device, comprising a housing (1) and a fan (10). A pretreatment chamber (2) and a working chamber (3) are provided inside the housing (1). An electrostatic precipitation module (4) is provided inside the working chamber (3). The electrostatic precipitation module (4) includes an ionization and ESP net, a photocatalyst plate, and an ultraviolet lamp. The ultraviolet lamp is provided in the middle of the two photocatalyst plates. The electrostatic precipitation element and the photocatalyst plate are made in the form of plug plates and are inserted from the upper end of the working chamber (3). Slots are provided on the inner side of the working chamber (3). An exhaust port (5) is communicated with one side of the working chamber (3), and an air inlet (6) is provided on one side of the pretreatment chamber (2). A pre-detector (7) is provided inside the pretreatment chamber (2). The pre-detector (7) is provided near the air inlet (6) and is used to detect the humidity and particulate matter content of the incoming gas. The fan (10) is used to draw external air into the pretreatment chamber (2) and discharge the gas from the exhaust port (5). It is characterized in that ； An intermediate chamber (11) is provided between the pretreatment chamber (2) and the working chamber (3). A semiconductor refrigeration sheet (8) is provided in the pretreatment chamber (2). A cold plate (9) and a heat sink (12) are respectively arranged at the cold end and the hot end of the semiconductor refrigeration sheet (8). The cold plate (9) is arranged in the pretreatment chamber (2). The air inlet (6) forms an angle with the air flow direction. The heat sink (12) is arranged in the intermediate chamber (11). The heat sink (12) is parallel to the gas flow direction. An ultrasonic atomizer (13) is provided in the housing (1). The ultrasonic atomizer (13) is communicated with a water tank (14). The water stored in the water tank (14) flows into the ultrasonic atomizer (13), and the ultrasonic atomizer (13) atomizes it. The ultrasonic atomizer (13) is provided with two air outlets in the pretreatment chamber (2). One air outlet is arranged in the exhaust port (5), and the other air outlet is arranged in the pretreatment chamber (2), and the setting position is upstream of the cold plate (9). The pre-detector 7 is connected to a controller. When the pre-detector (7) senses that the air humidity is greater than a first threshold, it triggers the semiconductor refrigeration sheet (8) to be powered on. The temperature of the cold plate (9) decreases, generating a large temperature difference with the room temperature, causing a large amount of water vapor in the flowing air to liquefy. When the pre-detector (7) senses that the particulate matter content is greater than a second threshold, it triggers the ultrasonic atomizer (13) to introduce water vapor into the pretreatment chamber (2). The water droplets adhere to the particles and finally adhere to the cold plate (9), reducing the amount of particles in the air, and then entering the working chamber (3) for further sterilization and dust removal.

2. The desktop air purification and sterilization device according to claim 1, characterized in that: The exhaust port (5) and the air inlet (6) are arranged on the same side. The intermediate chamber (11) has two layers, and the heat sink (12) is arranged in the layer close to the pretreatment chamber (2).

3. The desktop air purification and sterilization device according to claim 2, characterized in that: A heating wire is provided in the upper layer of the intermediate chamber (11).

4. The tabletop air purification and sterilization device according to claim 2, wherein: On the side of the pretreatment chamber (2), the working chamber (3) and the intermediate chamber (11) facing away from the air inlet (6), there is a rotatable shutter (15). The shutter (15) has two working positions. When the shutter (15) is in the second working position, the pretreatment chamber (2) is communicated with the working chamber (3) through the intermediate chamber (11). When the shutter (15) is in the first working position, the pretreatment chamber (2) is directly communicated with the working chamber (3).

5. The tabletop air purification and sterilization device according to claim 4, characterized in that: The shutter (15) switches to the second working position when the semiconductor refrigeration sheet (8) or the ultrasonic atomizer (13) is working, and switches to the first working position when the semiconductor refrigeration sheet (8) and the ultrasonic atomizer (13) are not working. The shutter (15) can be manually switched between working positions.

6. The tabletop air purification and sterilization device according to claim 4, characterized in that: The intermediate chamber (11) is inclined, and the side close to the ultrasonic atomizer (13) is the lower side. The water tank (14) has a water outlet on the side of the heat sink (12) away from the ultrasonic atomizer (13). The shutter (15) switches to the first working position when the water tank (14) triggers to drip water into the intermediate chamber (11).

7. The tabletop air purification and sterilization device according to claim 1, wherein: The cold plate (9) is an arc with a gradually decreasing diameter along the air flow direction, and a vertical protrusion is provided at the tail of the cold plate (9).

8. The tabletop air purification and sterilization device according to claim 7, characterized in that: A blocking curtain (16) capable of lifting is provided in the pretreatment chamber (2). The blocking curtain (16) is perpendicular to the air flow direction, and the blocking curtain (16) rises when the ultrasonic atomizer (13) introduces water vapor into the pretreatment chamber (2).

9. The tabletop air purification and sterilization device according to claim 7, characterized in that: A drawer (17) is provided at the bottom of the pretreatment chamber (2), and absorbent cotton is arranged in the drawer (17).

10. A desktop air purification and sterilization device according to claim 1, characterized in that: The interval between the two heat sinks (12) is smaller than the interval between the two cold plates (9), and the height of the heat sink (12) is smaller than the height of the cold plate (9).

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