CN106885312B

CN106885312B - Air cleaning machine

Info

Publication number: CN106885312B
Application number: CN201710249018.9A
Authority: CN
Inventors: 李建农; 李鹏; 柴利强
Original assignee: Beijing Sanlitong Electric Appliance Co ltd
Current assignee: Beijing Sanlitong Electric Appliance Co ltd
Priority date: 2017-04-17
Filing date: 2017-04-17
Publication date: 2022-05-10
Anticipated expiration: 2037-04-17
Also published as: CN106885312A

Abstract

The invention relates to an air cleaner, wherein a water tank type base is arranged at the bottom of a hollow box body, a grid type flow guide plate is arranged on a front panel of the box body, a rectangular overflow port is formed in the top end of the flow guide plate, the base is positioned in the box body, a plurality of gas channels which are in an inverted V-shaped trend from outside to inside are arranged at the lower part of the overflow port, a shell is arranged in the box body and comprises a front cavity and a rear cavity, a fan is arranged in the front cavity close to the flow guide plate, a composite purification filter material is arranged in the rear cavity far away from the flow guide plate, the periphery of the filter material is sealed and surrounded by the rear cavity, the rear side face of the filter material is exposed and close to a back plate of a machine case, a partition plate is arranged between the front cavity and the rear cavity, an air inlet is formed in the partition plate, the partition plate partially covers and is tightly attached to the front side face of the filter material, the air inlet of the fan faces the air inlet, and the top of the front cavity is communicated with an air outlet at the top of the box body. The air cleaning machine has the advantages of sufficient water-air mixing, good air purification effect, small occupied space and humidification.

Description

Air cleaning machine

Technical Field

The invention relates to the technical field of integrated room air conditioning devices, in particular to an air cleaning machine for cleaning and purifying air.

Background

As shown in fig. 14, chinese patent application publication No. CN 105903296 a discloses an air cleaner, wherein a hollow box 1 ' is installed in a water tank type base (not shown in the figure), a grid type guide plate 2 ' is disposed on a front panel 13 ' of the box 1 ', a rectangular overflow port 26 ' is disposed on a top end of the grid type guide plate 2 ', a plurality of air channels extending in a zigzag direction from outside to inside are disposed on a lower portion of the rectangular overflow port 26 ', a blower 20 ' is further disposed in the box 1 ', and an air suction port 201 ' of the blower 20 ' faces the air channels. The water pump 17 ' sucks the water in the base into the water storage tank 18 ' through the water pipe 171 ', and then the liquid level gradually rises until the water flows out of the rectangular overflow port 26 ' and flows down along the grid type guide plate 2 ' to form a waterfall. When air outside the box body enters the box body, the air passes through the waterfall, the purpose of cleaning the air is achieved, and the cleaned air is discharged through the air outlet. The air cleaning machine has the function of humidifying while cleaning air, and is favorable for improving the indoor air quality.

However, the above air washer has at least the following disadvantages:

1. the fan is exposed and close to the guide plate, and water is easily sucked into the box body to generate backflow when the wind speed is overlarge;

2. the air channel is in a broken line, water cannot be stored in the channel, the air cannot be fully contacted with the water, and the air cleaning effect is poor;

3. the outer diameter of the water tank is larger than that of the base, so that the occupied space is large and the appearance of the whole machine is influenced;

4. the water can only clean partial harmful components in the air, and the purification effect is unsatisfactory.

Disclosure of Invention

The invention aims to provide an air cleaning machine which has the advantages of full water-air mixing, good air purification effect, small occupied space and humidification function.

The invention relates to an air cleaner, which comprises a hollow box body, wherein the bottom of the box body is provided with a water tank type base, the front panel of the box body is provided with a grid type guide plate, the top end of the grid type guide plate is provided with a rectangular overflow port, the base is positioned in the box body, the lower part of the rectangular overflow port is provided with a plurality of gas channels which are arranged from outside to inside in an inverted V-shaped trend, a shell is arranged in the box body and comprises a front cavity and a rear cavity, a fan is arranged in the front cavity close to the grid type guide plate, a composite purification filter material is arranged in the rear cavity far away from the grid type guide plate, the periphery of the composite purification filter material is sealed and surrounded by the rear cavity, the rear side surface of the composite purification filter material is exposed and close to the back plate of the machine box, a partition plate is arranged between the front cavity and the rear cavity, and an air inlet is arranged on the partition plate, the baffle part covers and closely laminates the leading flank of compound purification filtering material, the induction port of fan is towards the air intake, preceding cavity top with the air outlet intercommunication at box top.

The invention relates to an air cleaner, wherein a grid type guide plate sequentially comprises an outer plate, a middle plate and an inner plate which are fixedly connected with each other from outside to inside, the two ends of the outer plate, the middle plate and the inner plate are sealed and fixed on a frame of a hollow box body, the outer plate comprises a bottom plate and a plurality of ribs which are integrally formed on the bottom plate, the cross sections of the ribs are in an isosceles trapezoid shape, a semi-circular arc shape or a triangular shape, the ribs are mutually parallel and are uniformly distributed in the height H direction of the grid type guide plate at intervals, a plurality of rows of through holes which are arranged at intervals are arranged from the middle upper part to the lower part of the bottom plate from top to bottom, the through holes are positioned between two adjacent ribs, the middle plate and the inner plate are all formed into an integral structure by a plurality of plates which have the same structure and are L-shaped in cross section, the short sides of the plates are horizontally arranged and positioned on the same horizontal plane, and the short sides of the plates of the middle plate are fixed on the bottom plate, the short edges of the plates of the inner plate are fixed on the short edges of the middle plate, the arrangement directions of the long edges of the plates of the middle plate and the inner plate are opposite, and the through holes, the short edges and the long edges form the gas channel in the shape of an inverted Chinese character 'ji'.

The air cleaner is characterized in that the bottom of the base is provided with a water pump, a water outlet of the water pump is connected with the lower end of a water delivery pipe, the upper end of the water delivery pipe is connected with a water storage tank arranged at the upper end of the grid type guide plate, the upper end of the water storage tank is provided with a horizontal guide part, the horizontal guide part is communicated with a rectangular overflow port, and the water storage tank is also internally provided with a plurality of water baffles which are arranged in a crossed and staggered manner.

The air cleaning machine is characterized in that the base is provided with the cover plate and the filter tank, the cover plate is provided with a water inlet hole, the water inlet hole is positioned on the outer side of the bottom end of the bottom plate, the filter tank is internally provided with a filter material, the bottom of the filter tank is provided with a water flowing hole, the filter material is provided with the filter material cover plate, and the filter material cover plate is provided with a water permeable hole.

The air cleaner is characterized in that the box body is internally provided with a negative ion generator, the bottom of the front cavity is provided with an ultraviolet lamp, the ultraviolet lamp is close to the water surface, and the negative ion generator and the ultraviolet lamp are both connected with an electric control device.

In summary, the air cleaner of the present invention washes and filters the air, and has the function of humidifying while purifying the air. Specifically, the water pump is with water suction from the base in, and water flows to rectangle overflow mouth and forms the waterfall along grid formula guide plate flow down after horizontal water conservancy diversion portion slow flow, because bottom plate upper portion does not set up the through-hole, does not have the windage, so the water yield is sufficient, rivers are more steady, the air current is more even, the surface of water is more level and smooth, more difficult emergence water droplet splashes. Simultaneously, the air outside the box body enters the box body through the air passage with the trend of inverted 'V' -shaped, the air resistance of the air passage is large, the air flow passing speed is low, the air flow can be fully contacted with the air, the cleaning effect is better, in addition, a water storage space is further enclosed among the inner plate, the middle plate and the outer plate, the contact time of the air flow and the water is further increased, and the better cleaning effect is obtained. The washed air is filtered by the composite purifying and filtering material and then is discharged from the air outlet under the action of the fan, so that the indoor air quality is effectively improved, and meanwhile, the negative ions are discharged from the air outlet by the negative ion generator in the box body. In addition, the air cleaner is extremely convenient to use and maintain, the purification effect can be ensured only by cleaning the water tank or replacing the water in the water tank according to requirements at any time, the service life of the composite purification filtering material is greatly prolonged by filtering after the air is washed, secondary pollution is avoided, and the use cost is effectively reduced.

The air cleaner of the present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is an isometric view of an air cleaner of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a front view of the air washer of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is an enlarged view of a portion of FIG. 4 at C;

FIG. 6 is a cross-sectional view taken along line D-D of FIG. 3;

FIG. 7 is an enlarged view of a portion of FIG. 6 at E;

FIG. 8 is an enlarged view of a portion of FIG. 6 at F;

FIG. 9 is a rear elevational view of the air washer of the present invention;

FIG. 10 is a right side elevational view of the air washer of the present invention;

FIG. 11 is a left side elevational view of the air washer of the present invention;

FIG. 12 is a top plan view of the air washer of the present invention;

FIG. 13 is a sectional view taken along line G-G of FIG. 11;

fig. 14 is a schematic structural view of a conventional air cleaner.

Detailed Description

As shown in fig. 1 to 3 and 12, the air cleaner of the present invention includes a hollow box 1, an air outlet 111 is disposed on a top plate 11 of the box 1, a water tank type base 3 is disposed at the bottom of the box 1, the base 3 is located in the box 1, a grid type guide plate 2 is disposed on a front panel 13 of the box 1, and the grid type guide plate 2 is embedded on a frame of the box 1.

Referring to fig. 6, the bottom of the box 1 is provided with a water pump 17, the water pump 17 is connected with an electric control device 19, and the inside of the box 1 is further provided with a negative ion generator 101 and a fan 20 which are both connected with the electric control device 19. The water outlet of the water pump 17 is connected with the lower end of the water pipe 171, the upper end of the water pipe 171 is connected with the water storage tank 18 at the upper end of the grid type guide plate 2, the top end of the grid type guide plate 2 is provided with a

rectangular overflow port

26, and 3 water baffles 181 which are arranged in a crossed and staggered mode are further installed in the water storage tank 18. The water baffle 181 is provided to buffer the water flowing out of the water pipe 171 and to uniformly and slowly flow out of the rectangular overflow port 26. In order to effectively play a role of buffering, the upper end of the water storage tank 18 is provided with the horizontal flow guide part 182, the horizontal flow guide part 182 is communicated with the rectangular overflow port 26, water flows out of the rectangular overflow port 26 after being buffered by the water baffle 181 and then being buffered by the horizontal flow guide part 182, so that a gentle waterfall on the water surface is formed, and splashing of water drops is avoided. The grid-type guide plate 2 comprises an outer plate 21, a middle plate 22 and an inner plate 23 which are fixedly connected with each other in sequence from outside to inside, the ends of the two ends of the outer plate 21, the middle plate 22 and the inner plate 23 are all sealed, and the ends of the two ends of the outer plate 21, the middle plate 22 and the inner plate 23 are all fixed on the frame of the hollow box body 1. The outer plate 21 includes a bottom plate 211 and a plurality of ribs 212 integrally formed thereon, and the cross section of the rib 212 is isosceles trapezoid, semicircular arc or triangle. The ribs 212 are parallel to each other and are uniformly distributed at intervals in the height direction H of the grid-type baffle 2. As shown in fig. 4, 5, 7, and 8, a plurality of rows of through holes 27 are arranged from top to bottom in the bottom plate 211, and the through holes 27 are located between two adjacent ribs 212. Through-hole 27 is not seted up to bottom plate 211 top partly, avoids influencing the flow because of admitting air, guarantees to have enough water to flow down slowly along the unsmooth alternate water conservancy diversion face that bottom plate 211 and rib 212 formed and forms the waterfall. The middle plate 22 and the inner plate 23 are all formed into an integral structure by a plurality of plates with the same structure and L-shaped sections, and the short edges of the plates of the middle plate 22 and the inner plate 23 are all horizontally arranged and are positioned on the same horizontal plane. The short sides of the middle plate 22 are fixed on the bottom plate 211, the short sides of the inner plate 23 are fixed on the short sides of the middle plate 22, and the arrangement directions of the long sides of the middle plate 22 and the inner plate 23 are opposite. Therefore, the through hole 27, the short side and the long side are enclosed to form an air passage with an inverted 'n' -shaped trend, air enters the box body 1 through the air passage, and meanwhile, a certain amount of water can be stored in the air passage, so that the contact time between air and water is increased, and better air cleaning and purifying effects are achieved.

The shape of the through hole 27 is not limited to a circular shape, and may be various shapes that satisfy the ventilation requirement, which is not listed here. Similarly, the shape of the rib 212 is not limited thereto, as long as water can flow slowly down from the rectangular overflow opening 26 to form a waterfall, for example, the rib may be a semi-circular arc or a triangle, which is not to be taken as an example, wherein the semi-circular arc has a better diversion function, and water drops are not easy to splash.

As shown in fig. 6 and 13, the casing 15 is installed in the box 1, a partition 153 is installed in the middle of the casing 15, the partition 153 divides the casing 15 into two chambers, namely a front chamber 151 and a rear chamber 152, the front chamber 151 near the grid-type air deflector 2 is installed with the fan 20, the rear chamber 152 far from the grid-type air deflector 2 is installed with the common composite purifying and filtering material 24 for purifying air, and the top of the front chamber 151 is communicated with the air outlet 111 at the top of the box 1. The periphery of the composite purification filter material 24 is hermetically surrounded by the rear chamber 152, so that water drops generated by the waterfall flowing down along the grid-type guide plate 2 do not hit the surface of the composite purification filter material 24. The rear side 241 of the composite purification filter material 24 is exposed and close to the back plate 131 of the cabinet 1. The partition 153 is provided with an air inlet 154, so that the partition 153 does not completely cover the front side 242 of the composite purification filter material 24 opposite to the rear side 241, but partially covers and closely adheres to the front side 242, and the air inlet of the fan 20 faces the air inlet 154. In order to further improve the purification effect, the bottom of the front chamber 151 is provided with an ultraviolet lamp 1511, the ultraviolet lamp 1511 is close to the water surface, and the anion generator 101 and the ultraviolet lamp 1511 are both connected with the electric control device 19. Wherein, the releasing tip of the negative ion generator 101 is located on the partition 153 and near the air outlet 111. Preferably, an ultraviolet lamp can be additionally arranged in the water tank type base 3, so that a better purification effect is obtained. When the cleaning machine is used, water is contained in the water tank type base 3, the cover plate 32 is arranged on the base 3, the cover plate 32 is provided with the water inlet hole 321, the water inlet hole 321 is positioned on the outer side of the bottom end of the bottom plate 211, and water flowing down along the grid type guide plate 2 flows into the base 3 through the water inlet hole 321. In order to obtain purified water and improve the purification effect, a filter tank (not shown in the figure) is further arranged on the base 3, a filter material is placed in the filter tank, a water flowing hole is formed in the bottom of the filter tank, a filter material cover plate for preventing the filter material from bouncing is placed on the filter material, a water permeating hole is formed in the filter material cover plate, and water is conveniently injected into the filter material through the water permeating hole. The water pump 17 draws purified water into the water delivery tube 171 and ultimately into the reservoir 18.

As shown in fig. 9, a switch panel (not shown) is further disposed inside the box 1, a switch is mounted on the switch panel (not shown), the switch is connected to the electric control device 19 in fig. 6, the box 1 further includes a back plate 131 for closing the back side thereof, an opening 1311 is disposed on the back plate 131, the switch is exposed out of the opening 1311, and a plug power line 1312 on the electric control device 19 penetrates through the switch panel and then extends out of the opening 1311. The arrangement greatly improves the aesthetic degree of the air cleaner, avoids the problems of wire winding and the like, and is convenient for a user to control the on-off of the air cleaner.

As shown in fig. 10 and 11, the left and right side plates of the box 1 are provided with long holes 12, which facilitates the carrying of the cleaning machine.

As shown in fig. 3 and 6, the upper portion of the front panel 13 of the box 1 is further provided with an indicator light (not shown) and various control switches (not shown), and the indicator light and the control switches are both connected to the electric control device 19. The indicator light is used for indicating the on-off of the power supply, the on-off of the water pump 17, the on-off of the fan 20 and the on-off of the anion generator 101, so that a user can conveniently know the on-off condition of each function or equipment of the air cleaning machine.

Referring to fig. 1 to 13, the air cleaner of the present invention has the following working principle:

retaining in the base 3, water pump 17 inhales into raceway 171 and upwards transports to the aqua storage tank 18 along raceway 171 in, when the liquid level in aqua storage tank 18 exceeds horizontal water conservancy diversion portion 182, water slowly flows out and flows out through rectangle overflow mouth 26 along horizontal water conservancy diversion portion 182 level, because bottom plate 211 upper portion does not set up through-hole 27, so the velocity of flow is not influenced by the air inlet, and rivers can form the waterfall along grid formula guide plate 2 flows down. In the middle upper portion to the lower portion of the bottom plate 211, air enters the case 1 through the air passage in the inverted zigzag shape, and enters from the rear side 241 of the composite purifying and filtering material 24 after surrounding from the inside of the case 1, and the air purified and filtered by the composite purifying and filtering material 24 is sucked into the front chamber 151 from the air inlet 154 by the fan 20, and finally discharged from the air outlet 111. The air is cleaned in the process of penetrating the waterfall to enter the box body 1, and when water flows down along the grid-type guide plate 2, part of the water enters a space surrounded by the bottom plate 211, the middle plate 22 and the inner plate 23 through the through holes 27, the space stores water, the contact time of the air and the water is prolonged, and a better cleaning effect is achieved. The cleaned air is purified and filtered when passing through the composite purifying and filtering material 24, so that harmful substances in the air are further effectively removed. The cleaned and purified air is discharged from the air outlet 111, and the indoor air quality is greatly improved. Meanwhile, the negative ion generator 101 inside the box 1 is started under the action of the electric control device 19, and the generated negative ions rise through the negative ion discharge channel and are finally discharged from the air outlet 111, so that the negative ions in the air are increased. In the process, the water pump 17 is regulated and controlled by the electric control device 19 to obtain a proper lift, and the flow rate and the flow speed of the water flow required by the cleaning air are ensured.

The method for cleaning and purifying air by using the air cleaner comprises the following steps:

A. water is injected into the base 3, and water is poured onto the filter material in the filter tank, so that the water can be purified in advance, and a better air cleaning effect is obtained;

B. the water pump 17 is started through the electric control device 19, water in the base 3 is sucked into the water pipe 171, enters the water storage tank 18 after reaching the top end of the water pipe 171, then the liquid level gradually rises until the water flows out of the rectangular overflow port 26 and flows down along the grid-type guide plate 2 to form a waterfall;

C. after entering the box body 1 through the gas channel, the air is purified and filtered by the composite purification and filtration material 24, the electric control device 19 starts the fan 20, and the fan 20 sucks the purified air into the front chamber 151 through the air inlet 154 and discharges the air through the air outlet 111;

D. when the anion generator 101 is arranged in the box body 1, the anion generator 101 is started through the electric control device 19, so that anions are discharged from the air outlet 111.

In summary, compared with the existing air cleaning machine, the air cleaning machine of the invention has at least the following beneficial effects:

1. the air channel with the inverted 'V' -shaped trend on the grid-type guide plate 2 has large wind resistance, is favorable for slowing down the air inlet speed, fully mixes air and water flow, can store water, further prolongs the contact time of the air and the water, and obviously improves the air cleaning effect;

2. the fan 20 is sealed in the shell 15 and is not contacted with the water curtain, so that the problem that the water curtain flows back into the box body 1 is thoroughly avoided, and the circuit safety in the box body 1 is ensured;

3. a composite purification filter material 24 is further packaged in the shell 15, and air is filtered by the composite purification filter material 24 after being washed, so that the cleanliness is further improved;

4. the composite purifying and filtering material 24 is packaged in the shell 15 and close to the back plate 131, is far away from the water curtain and is surrounded by the shell 15 at the periphery, so that the filtering effect is prevented from being influenced and the service life is prolonged due to splashing of water drops;

5. the formaldehyde is easy to dissolve in water, the water is the most safe and effective carrier for purifying the formaldehyde, the formaldehyde component in the air can be effectively removed by the water when the air passes through the water curtain, and the addition of a small amount of formaldehyde in the water has the effects of disinfection and sterilization, thereby being more beneficial to cleaning the air;

6. pollutants in the air can be effectively removed by cleaning the water tank or replacing the sewage in the water tank, and the cleaning and the replacement are convenient and economical, so that the service life of the composite purification and filtration material 24 is prolonged, and the cost is further reduced;

7. the water tank type base 3 is arranged in the box body 1, the size of the water tank type base is matched with that of the box body 1, the occupied space is small, and the attractiveness of the whole machine is improved.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides an air cleaner, includes cavity box (1), cavity box (1) bottom is provided with water tank formula base (3), be equipped with grid formula guide plate (2) on front panel (13) of cavity box (1), rectangle overflow mouth (26), its characterized in that have been seted up on the top of grid formula guide plate (2): the grid type guide plate comprises a hollow box body (1), wherein the left side plate and the right side plate of the hollow box body (1) are respectively provided with a long hole (12), a base (3) is positioned in the hollow box body (1), a grid type guide plate (2) sequentially comprises an outer plate (21), a middle plate (22) and an inner plate (23) which are fixedly connected with each other from outside to inside, the two ends of the outer plate (21), the middle plate (22) and the inner plate (23) are respectively sealed and fixed on the frame of the hollow box body (1), the outer plate (21) comprises a bottom plate (211) and a plurality of ribs (212) which are integrally formed on the bottom plate, the cross section of each rib (212) is isosceles trapezoid, semicircular arc or triangle, the plurality of ribs (212) are mutually parallel and are uniformly distributed in the height H direction of the grid type guide plate (2) at intervals, a plurality of rows of through holes (27) which are arranged at intervals are arranged from the top to the bottom of the middle upper part to the lower part of the bottom plate (211), and the through holes (27) are positioned between two adjacent ribs (212), the middle plate (22) and the inner plate (23) are of an integral structure formed by a plurality of plates which are of the same structure and have L-shaped sections, the short edges of the plates are horizontally arranged and are positioned on the same horizontal plane, the short edges of the plates of the middle plate (22) are fixed on the bottom plate (211), the short edges of the plates of the inner plate (23) are fixed on the short edges of the middle plate (22), the arrangement directions of the long edges of the plates of the middle plate (22) and the inner plate (23) are opposite, and the through holes (27), the short edges and the long edges are enclosed to form an air channel in an inverted V-shaped trend; the built-in casing (15) that is equipped with of cavity box (1), casing (15) are close to including two front and back cavities, are close to built-in fan (20) that is equipped with in preceding cavity (151) of grid formula guide plate (2), keep away from built-in compound purification filtering material (24) that is equipped with in back cavity (152) of grid formula guide plate (2), compound purification filtering material (24) all around by back cavity (152) are sealed surrounds, the trailing flank (241) of compound purification filtering material (24) expose and are close to backplate (131) of cavity box (1), be equipped with baffle (153) between preceding cavity (151), back cavity (152), be provided with air intake (154) on baffle (153), baffle (153) part covers and closely laminates the leading flank (242) of compound purification filtering material (24), the induction port of fan (20) faces towards air intake (154), the top of the front chamber (151) is communicated with an air outlet (111) at the top of the hollow box body (1).

2. The air cleaner of claim 1, wherein: the water treatment device is characterized in that a water pump (17) is installed at the bottom of the base (3), a water outlet of the water pump (17) is connected with the lower end of a water conveying pipe (171), the upper end of the water conveying pipe (171) is connected with a water storage tank (18) at the upper end of the grid type guide plate (2), a horizontal flow guide part (182) is arranged at the upper end of the water storage tank (18), the horizontal flow guide part (182) is communicated with a rectangular overflow port (26), and a plurality of water baffle plates (181) which are arranged in a crossed and staggered mode are further installed in the water storage tank (18).

3. The air washer according to claim 2, wherein: be equipped with apron (32) and filter-tank on base (3), be provided with inlet opening (321) on apron (32), inlet opening (321) are located bottom plate (211) bottom outside, it has the discharge orifice to have placed the filter material and open bottom in the filter-tank, it has filtered the material apron to have placed on the filter material, it has seted up the hole of permeating water on the material apron to filter.

4. The air cleaner of claim 3, wherein: the water-saving water tank is characterized in that a negative ion generator (101) is further arranged inside the hollow tank body (1), an ultraviolet lamp (1511) is installed at the bottom of the front chamber (151), the ultraviolet lamp (1511) is close to the water surface, and the negative ion generator (101) and the ultraviolet lamp (1511) are both connected with an electric control device (19).