Long-acting odor-isolating floor drain with negative-pressure water replenishing function

Abstract

The invention discloses a negative-pressure water-replenishing long-acting odor-isolating floor drain, which comprises a sealed filter cartridge, a filter cartridge sealing ring, a filter screen, a water-containing dirt-cleaning cartridge main body, a floor drain outer cover main body, a negative-pressure water storage device, a water-containing cartridge sealing ring, a water-containing cartridge water outlet, a water-containing cartridge, a dirt-discharging sealing ring, a dirt-discharging connecting pipe, an exhaust pipe sealing cover, a water storage device exhaust pipe and a water storage device water outlet pipe, the floor drain is mainly characterized in that stored water of a negative pressure water storage device is higher than the lower edge of a water outlet of a water containing barrel, a water outlet pipe opening of the water storage device is formed below the lower edge of the water outlet of the water containing barrel, the water containing barrel is kept at the fixed water storage depth for a long time through the siphon effect, the Bernoulli equation and the air pressure balance principle, and the problem that the floor drain loses the odor isolation function due to water volatilization is solved; the device is simple in structure, convenient to maintain and wide in application range, and has remarkable social value and market prospect.

Description

Technical Field

[0001] The invention relates to the technical field related to sanitary ware, and in particular to a long-lasting odor-isolating floor drain with a negative pressure water replenishment function. Background Art

[0002] As an important part of the building drainage system, floor drains are widely used in areas such as home balconies, kitchens, shower rooms and toilets. Even the drainage of wash basins and sinks requires separate floor drains. According to statistics, there are about 490 million urban residential houses in my country, and each household needs to install at least 4 to 6 floor drains, which means that the market stock of floor drains is as high as billions. However, existing floor drain products have many shortcomings in terms of sealing performance, long-term effectiveness and maintenance convenience, and it is difficult to meet the needs of modern life for hygiene and health.

[0003] Common floor drains on the market are mainly divided into two types: water-seal type and one-way closed type. Water-seal type floor drains form a sealed barrier by storing water, but the stored water is easily lost due to evaporation, especially in places such as kitchens and balconies where there is not often open water replenishment. The water evaporates about 1 to 2 mm of water every day, causing the water seal to fail within 1 to 2 months. In addition, the actual water seal depth of many water-seal type floor drains is far lower than the 50 mm specified in the national standard, further exacerbating the lack of sealing performance. One-way closed type floor drains rely on hard planes or soft rubber sealing ports to achieve closure, but because the water flowing into the floor drain from the ground often contains impurities such as fiber strips and hair, it is easy to get stuck in the moving parts, causing the problem of loose sealing. Although some new floor drains such as the electric control water replenishment type and the push-to-open type provide additional functions, they still have problems such as complex operation, loose closure, or easy aging and deformation.

[0004] The exhaust gas components in the sewage pipe mainly include hydrogen sulfide, ammonia, methane and other volatile organic compounds. These gases are harmful to human health. Long-term exposure may cause symptoms such as headaches, dizziness, nausea, and even increase the risk of leukemia in severe cases. Therefore, the sealing performance of floor drains is directly related to indoor air quality and the health of residents. However, the performance of existing floor drains in terms of long-term sealing and convenient maintenance is not satisfactory, especially in areas where there is not often water replenishment on the ground, such as kitchens, balconies and toilet areas. The problem is particularly prominent.

[0005] In order to solve the above problems, the present invention proposes a negative pressure water replenishment long-term odor-isolating floor drain, which sets the water storage height of the negative pressure water storage tank higher than the lower edge of the water outlet of the water storage tank, and uses the siphon effect, Bernoulli equation and air pressure balance principle to immerse the outlet pipe of the water storage tank below the water storage surface of the water storage tank, thereby achieving long-term maintenance of static water flow and fixed water storage depth. This design not only solves the problem of water seal loss due to evaporation in traditional floor drains, but also significantly improves the sealing performance and maintenance convenience of floor drains, providing an innovative solution for improving indoor environmental quality. Summary of the invention

[0006] The purpose of the present invention is to provide a long-lasting odor-isolating floor drain with a negative pressure water replenishment function to overcome the deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A negative pressure water replenishment long-term odor-proof floor drain, comprising a sealing filter cartridge, a filter cartridge sealing ring, a filter screen, a water and sewage cleaning cartridge body, a floor drain cover body, a negative pressure water storage tank, a water storage cartridge sealing ring, a water storage cartridge water outlet, a water storage tank, a sewage sealing ring, a sewage connection pipe, an exhaust pipe sealing cover, a water storage tank exhaust pipe, and a water storage tank outlet pipe. Among them: The water storage height in the negative pressure water storage tank is higher than the lower edge of the water outlet of the water storage tank, and the outlet of the water storage tank is placed below the lower edge of the water outlet of the water storage tank. According to the siphon effect, Bernoulli equation and air pressure balance principle, when the outlet of the water storage tank is immersed below the water storage surface of the water storage tank, the negative pressure generated in the negative pressure water storage tank and the pressure of the external atmospheric pressure on both ends of the water outlet of the water storage tank reach a balanced state, so that the water flow remains stationary and the water storage tank is maintained to have a fixed water storage depth for a long time.

[0008] Furthermore, the negative pressure water storage device has various structural forms and can be buried under floor tiles, or installed on walls, wash basin cabinets, etc. As long as there is enough water in the negative pressure water storage device above the lower edge of the water outlet of the water storage cylinder, the long-term water replenishment function can be achieved. The specific implementation method of the negative pressure water storage device includes but is not limited to using a standard water inlet pipe as a water storage container and connecting it to the water outlet of the water storage cylinder through a pipe.

[0009] In particular, the location of the water tank exhaust pipe is flexible and can be set inside the main body of the floor drain cover, or at any position on the upper part of the negative pressure water tank. The exhaust pipe sealing cover is used to exhaust air when adding water to ensure convenient operation. The design of the water tank exhaust pipe must meet the following conditions: the height of its pipe mouth should be higher than the highest liquid level in the negative pressure water tank to prevent liquid from overflowing; at the same time, the exhaust pipe sealing cover must have good sealing performance to prevent outside air from entering the negative pressure water tank and affecting the pressure balance.

[0010] Furthermore, the appearance of the floor drain cover body and the negative pressure water storage tank is not limited and can be designed according to actual needs. The material selection is flexible, and metal materials or chemical synthetic materials can be used to meet the use requirements in different environments. For example, corrosion-resistant stainless steel materials can be selected in a humid environment, and high-strength plastic materials can be selected in a dry environment.

[0011] In particular, the depth of the water outlet pipe of the water storage tank immersed in the water storage cylinder can be adjusted as needed. On the premise of meeting the water storage depth, the deeper the water outlet pipe of the water storage tank is immersed, the lower the frequency of water replenishment due to water evaporation. The specific structural form of the water outlet pipe of the water storage tank includes but is not limited to a straight pipe, a curved pipe or a telescopic pipe with an adjustment device to adapt to different installation scenarios and usage requirements.

[0012] Furthermore, the negative pressure water storage device can be connected to multiple floor drain cover bodies through pipes, which is suitable for the quantitative water replenishment needs of multiple floor drains, and is particularly suitable for scenes where floor drains need to be densely installed, such as hotels, offices, and apartments. The specific implementation method is: multiple water outlet interfaces are added at the bottom or side of the negative pressure water storage device, and are respectively connected to the water outlets of the water cylinders of different floor drain cover bodies through pipes, thereby realizing the multi-point water replenishment function.

[0013] In particular, the sealed filter cartridge can be directly pulled out to clean up garbage, which is easy to operate. The top structure and shape of the sealed filter cartridge can be designed according to actual needs, such as setting filter screens of different densities or multi-layer filter structures on the top to improve the filtering effect. In addition, the lower end of the sealed filter cartridge needs to be inserted into the water storage cylinder to a depth of at least 50 mm to ensure that the floor drain cover body is isolated from the outside air and to prevent sewage backflow.

[0014] Furthermore, the water cylinder can be disassembled for cleaning. If necessary, the water outlet pipe of the water storage tank can be removed first and the water outlet of the negative pressure water storage tank can be blocked. The length of the water cylinder must meet the water storage depth requirement of at least 50 mm, and it is equipped with a water cylinder sealing ring to ensure the sealing performance between the water cylinder and the main body of the floor drain cover. The height of the water outlet of the water cylinder needs to be designed according to the drainage flow rate to ensure smooth drainage without destroying the pressure balance.

[0015] In particular, when the negative pressure water storage tank is replenished with water, the following steps need to be followed: S1, pull out the sealed filter cartridge; S2, connect a water pipe with a funnel to the water outlet pipe of the water storage tank; S3, remove the exhaust pipe sealing cover; S4, add water to the funnel until water comes out of the exhaust pipe of the water storage tank; S5, reinstall the exhaust pipe sealing cover on the exhaust pipe of the water storage tank. The above steps ensure the accuracy and reliability of the water replenishment process.

[0016] Furthermore, the working process of the floor drain is as follows: in the initial state, the water height in the negative pressure water reservoir is higher than the lower edge of the water outlet of the water storage cylinder, and the nozzle of the water outlet pipe of the water storage cylinder is immersed below the water storage surface of the water storage cylinder. The negative pressure generated in the negative pressure water reservoir and the external atmospheric pressure reach a balance on the pressure at both ends of the water outlet of the water storage cylinder, the water flow remains static, and the water storage cylinder maintains a fixed water storage depth for a long time. As time goes by, the water in the water storage cylinder decreases due to volatilization. When the water storage surface is lower than the nozzle of the water outlet pipe of the water storage cylinder, the pressure at both ends of the water outlet of the water storage cylinder loses balance, and the water in the negative pressure water storage cylinder automatically flows out for water replenishment until the water storage surface re-seals the nozzle of the water outlet pipe of the water storage cylinder, the pressure is restored to balance, and water replenishment stops.

[0017] In particular, the convenience of maintenance and cleaning of the floor drain is reflected in the following aspects: the sealed filter cartridge can be directly pulled out to clean the garbage, which is simple to operate; the water storage cylinder can be disassembled and cleaned, and if necessary, the water outlet pipe of the water storage tank can be removed first and the water outlet of the negative pressure water storage tank can be blocked; when the negative pressure water storage tank is replenished with water, it is necessary to follow the above steps to ensure convenient operation.

[0018] Compared with the prior art, the present invention has the following beneficial effects: By cleverly combining the negative pressure water storage tank with the water storage cylinder, the siphon effect, the Bernoulli equation and the principle of air pressure balance are used to achieve a long-term odor isolation function. The floor drain has a simple structure, convenient maintenance, a wide range of applications, and significant social value and market prospects. Furthermore, the long-term sealing characteristics of the floor drain are reflected in: even in a well-ventilated and high-temperature environment, the water seal effect can be maintained for months or even years. By reasonably adjusting the immersion depth of the water outlet pipe of the water storage tank, the frequency of water replenishment can be significantly reduced, thereby extending the service life of the floor drain. In particular, the multi-purpose characteristics of the floor drain make it suitable for a variety of scenarios, such as the water replenishment needs of floor drains in dry and wet separation areas. Through the multi-point connection function of the negative pressure water storage tank, the synchronous water replenishment of multiple floor drains can be achieved, significantly improving the use efficiency. In summary, the present invention solves the problem of easy failure of the traditional floor drain water seal by combining the negative pressure water storage tank with the water storage cylinder, using scientific principles and technical means, while taking into account the convenience of maintenance and the flexibility of appearance design, and providing an innovative solution for the field of sanitary ware. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the negative pressure water storage device of the present invention; Figure 2 This is a schematic diagram of the main structure of the sealing filter cartridge and the floor drain cover of the present invention; Figure 3 This is a schematic diagram of the main structure of the water-containing and sewage-cleaning cylinder of the present invention; Figure 4 It is a schematic diagram of the structure of the floor drain outer cover body and the sewage connection pipe of the present invention. The reference numerals are as follows: 1. Sealed filter cartridge; 101. Filter cartridge sealing ring; 102. Filter screen; 2. Water storage and sewage cleaning cartridge body; 201. Water storage cartridge sealing ring; 202. Water storage cartridge water outlet; 203. Water storage cartridge; 3. Floor drain cover body; 301. Cover sealing ring; 302. Sewage discharge sealing ring; 4. Negative pressure water storage tank; 401. Exhaust pipe sealing cover; 402. Water storage tank exhaust pipe; 403. Water storage tank outlet pipe. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings: The specific implementation method of the negative pressure water replenishment long-term odor-isolating floor drain of the present invention is combined with the attached Figure 1 To Attachment Figure 4 The core structure of the floor drain includes a sealing filter cartridge 1, a filter cartridge sealing ring 101, a filter screen 102, a water storage and cleaning cartridge body 2, a floor drain cover body 3, a negative pressure water storage tank 4, a water storage cartridge sealing ring 201, a water storage cartridge water outlet 202, a water storage cartridge 203, a sewage sealing ring 302, a sewage connection pipe, an exhaust pipe sealing cover 401, a water storage cartridge exhaust pipe 402, and a water storage cartridge outlet pipe 403. The following will describe the embodiments of the present invention in detail in combination with specific components and reference numerals.

[0024] The sealed filter cartridge 1 is located at the top, and it forms a close fit with the upper opening of the floor drain cover body 3 by sleeve-mounting the filter cartridge sealing ring 101, that is, a closed connection. A filter screen 102 is arranged inside the sealed filter cartridge 1 to intercept larger solid debris and prevent it from entering the floor drain and affecting the drainage performance. The water-collecting and sewage-cleaning cartridge body 2 is installed inside the floor drain cover body 3, and a water-collecting cartridge sealing ring 201 is arranged on the top thereof to form a sealed connection with the inner wall of the floor drain cover body 3. The water-collecting cartridge 203 is located at the lower part of the water-collecting and sewage-cleaning cartridge body 2, and a plurality of water-collecting cartridge water outlets 202 are arranged in an annular manner on the top of the water-collecting cartridge 203. Specifically, a sewage connection pipe is arranged at the bottom of the floor drain cover body 3, and the water-collecting cartridge water outlet 202 discharges the stored water to the sewage connection pipe. A sewage connection pipe is generated at the bottom of the floor drain cover body 3, and a sewage sealing ring 302 is sleeved on the outside thereof for connection with the sewage pipe pre-buried in the building. The negative pressure water reservoir 4 is located in the middle and upper part of the floor drain cover body 3, and the water level stored therein is higher than the lower edge of the water outlet 202 of the water storage cylinder, and the mouth of the water reservoir outlet pipe 403 extends below the water storage surface of the water storage cylinder 203 to achieve pressure balance and automatic water replenishment functions. A water reservoir exhaust pipe 402 is provided at the top of the negative pressure water reservoir 4, and the top port of the water reservoir exhaust pipe 402 is covered with an exhaust pipe sealing cover 401 for exhausting when adding water.

[0025] The depth of the sealed filter cartridge 1 inserted into the water storage cylinder 203 must exceed 50 mm to ensure that its lower end is completely immersed in the stored water, thereby isolating the outside air from entering the floor drain. The filter screen 102 maintains a gap of at least 30 mm from the bottom of the water storage cylinder 203 to facilitate the smooth flow of sewage into the water storage cylinder 203. The length of the water storage cylinder 203 must meet the national standard water storage depth requirement of 50 mm, and a certain height must be reserved for the water outlet bend design. The water storage cylinder sealing ring 201 is located 20 mm below the upper opening of the floor drain outer cover body 3, leaving enough sealing space for the filter cartridge sealing ring 101. The height of the water outlet 202 of the water storage cylinder is optimized according to the drainage flow demand to ensure smooth water flow without destroying the pressure balance.

[0026] A sewage connection pipe is formed at the bottom of the floor drain cover body 3, and its diameter is designed to fit the 50 mm pipe reserved for the current floor drain sewage. A sewage sealing ring 302 is sleeved on the outside of the sewage connection pipe to form a sealed connection with the sewage pipe pre-buried in the building. The cover sealing ring 301 is located at the bottom of the floor drain cover body 3 to enhance the overall sealing performance. The material of the floor drain cover body 3 can be selected from metal materials or chemical synthetic materials according to actual needs, such as stainless steel or high-strength plastic, to meet the use requirements in different environments.

[0027] The negative pressure water reservoir 4 preferably uses a standard PVC water inlet pipe as a water storage container, and its volume can be flexibly adjusted according to actual needs. The water reservoir exhaust pipe 402 is located at the top of the negative pressure water reservoir 4 and is used to exhaust when adding water. The exhaust pipe sealing cover 401 covers the end of the water reservoir exhaust pipe 402 to ensure the sealing during the water adding process. The water reservoir outlet pipe 403 is located at the bottom of the negative pressure water reservoir 4, and its pipe mouth extends below the water storage surface of the water storage cylinder 203 to realize the automatic water replenishment function. The opening of the water reservoir outlet pipe 403 is designed to face downward to prevent the stored water from flowing back into the negative pressure water reservoir 4.

[0028] The working principle of the negative pressure water replenishment long-term odor-proof floor drain of the present invention is as follows: in the initial state, the water storage height in the negative pressure water reservoir 4 is higher than the lower edge of the water outlet 202 of the water storage cylinder, and the nozzle of the water outlet pipe 403 of the water storage cylinder is immersed below the water storage surface of the water storage cylinder 203. At this time, the negative pressure generated inside the negative pressure water reservoir 4 and the external atmospheric pressure on the pressure at both ends of the water outlet 202 of the water storage cylinder reach a balanced state, so that the water flow remains stationary, and the water storage cylinder 203 maintains a fixed water storage depth for a long time. As time goes by, the water in the water storage cylinder 203 decreases due to volatilization. When the water storage surface is lower than the nozzle of the water outlet pipe 403 of the water storage cylinder, the pressure at both ends of the water outlet 202 of the water storage cylinder loses balance, and the water in the negative pressure water reservoir 4 automatically flows out for water replenishment. After the replenishment water flows to the water storage surface and re-seals the nozzle of the water outlet pipe 403 of the water storage cylinder, the pressure is restored to balance and the water replenishment stops. The above process utilizes the siphon effect, Bernoulli equation and air pressure balance principle to realize the automatic water replenishment function, which significantly prolongs the odor-isolating effect of the floor drain.

[0029] The floor drain of the present invention is easy to clean and maintain. When it is necessary to clean the garbage in the sealed filter cartridge 1, the sealed filter cartridge 1 can be directly pulled out, the garbage can be dumped out, and then reinstalled. If it is necessary to clean the garbage in the water storage cylinder 203, a small spoon can be used to take it out without disassembling the water storage and cleaning cylinder body 2. If it is necessary to thoroughly clean the water storage cylinder 203, the water storage tank outlet pipe 403 must be removed first and the water outlet of the negative pressure water storage tank 4 must be blocked, and then the water storage cylinder 203 must be removed for cleaning.

[0030] The water replenishment operation of the negative pressure water storage tank 4 includes the following steps: S1, pull out the sealed filter cartridge 1; S2, connect a water pipe with a funnel to the water outlet pipe 403 of the water storage tank; S3, remove the exhaust pipe sealing cover 401; S4, add water to the funnel until water emerges from the exhaust pipe 402 of the water storage tank; S5, reinstall the exhaust pipe sealing cover 401 to the exhaust pipe 402 of the water storage tank to complete the water replenishment operation.

[0031] The negative pressure water storage device 4 of the present invention has various structural forms, and the open or concealed installation method can be selected according to actual needs. If the concealed installation method is selected, the negative pressure water storage device 4 can be buried under the floor tiles and arranged using the space of the sinking tank. If the open installation method is selected, the negative pressure water storage device 4 can be installed on a wall or a wash basin cabinet. Regardless of the installation method adopted, it is necessary to ensure that the water storage height in the negative pressure water storage device 4 is higher than the lower edge of the water outlet 202 of the water storage cylinder. In addition, the negative pressure water storage device 4 can be connected to multiple floor drain cover bodies 3 through a pipeline, which is suitable for scenes such as hotels, offices, and apartments where floor drains need to be densely installed. The specific implementation method is: multiple water outlet interfaces are added at the bottom or side of the negative pressure water storage device 4, and are respectively connected to the water outlets 202 of different floor drain cover bodies 3 through pipelines, thereby realizing a multi-point water replenishment function.

[0032] The floor drain of the present invention has a wide range of applications and is particularly suitable for the water replenishment needs of floor drains in dry and wet separation areas. For example, in a bathroom, the floor drain in the shower room area can adopt a traditional water-immersed floor drain, while the floor drain in the toilet area can select the negative pressure water replenishment long-acting odor-isolating floor drain of the present invention. The toilet area usually lacks clear water replenishment, and the traditional water-sealed floor drain is prone to lose the odor-isolating function due to water volatilization, while the floor drain of the present invention solves this problem through the automatic water replenishment function of the negative pressure water reservoir 4. In addition, the floor drain of the present invention can also be used in areas where clear water is not often present, such as balconies and kitchens. By reasonably adjusting the immersion depth of the water reservoir outlet pipe 403, the water replenishment frequency can be significantly reduced, thereby extending the service life of the floor drain.

[0033] In summary, the negative pressure water replenishment long-term odor-isolating floor drain of the present invention solves the problem of easy failure of the water seal of the traditional floor drain by ingeniously combining the negative pressure water storage tank 4 with the water storage cylinder 203, using scientific principles and technical means, while taking into account the convenience of maintenance and the flexibility of appearance design. The long-term sealing characteristics, multi-purpose characteristics and convenient maintenance of the floor drain make it have significant social value and market prospects.

[0034] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered as within the scope of this specification. For ordinary technicians in this field, they can make several modifications and improvements without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A negative pressure water replenishment long-term odor-isolating floor drain, characterized by: It includes a sealed filter cartridge, a water and dirt cleaning cartridge body, a floor drain cover body, a negative pressure water storage tank and a water outlet pipe of the water storage tank. The water cartridge is provided with a water outlet of the water cartridge, and the mouth of the water outlet pipe of the water storage tank is placed below the lower edge of the water outlet of the water cartridge; the water and dirt cleaning cartridge body is installed inside the floor drain cover body, the negative pressure water storage tank is connected to the water cartridge, the water storage tank body includes the water cartridge, and the water storage height in the negative pressure water storage tank is higher than the lower edge of the water outlet of the water cartridge; the sealed filter cartridge is tightly connected to the floor drain cover body.

2. The floor drain according to claim 1, characterized in that: The negative pressure water storage device can be buried under floor tiles or installed on a wall or a wash basin cabinet.

3. The floor drain according to claim 1 or 2, characterized in that: The negative pressure water storage device adopts a water inlet pipe of standard specifications as a water storage container and is connected to the water outlet of the water storage cylinder through a pipeline.

4. The floor drain according to claim 1, characterized in that: A water storage exhaust pipe is arranged on the top of the negative pressure water storage tank, and the height of the pipe mouth of the water storage exhaust pipe is higher than the highest liquid level in the negative pressure water storage tank.

5. The floor drain according to claim 4, characterized in that: The port of the water storage tank exhaust pipe is covered with an exhaust pipe sealing cover, and the exhaust pipe sealing cover has a sealing performance to prevent outside air from entering the negative pressure water storage tank.

6. The floor drain according to claim 1, characterized in that The material of the floor drain outer cover body and the negative pressure water storage tank is metal material or chemical synthetic material.

7. The floor drain according to claim 1, characterized in that: The depth of the water outlet pipe of the water storage device immersed in the water cylinder is adjustable.

8. The floor drain according to claim 7, characterized in that: The water outlet pipe of the water storage tank is a straight pipe, a curved pipe or a telescopic pipe with an adjusting device.

9. The floor drain according to claim 1, characterized in that: The negative pressure water storage device is connected to a plurality of floor drain outer cover bodies through a pipeline.

10. The floor drain according to claim 1, characterized in that: The sealing filter cartridge is inserted into the water storage cylinder to a depth of not less than 50 mm; the sealing filter cartridge is provided with a filter cartridge sealing ring, and the sealing filter cartridge is tightly connected to the upper opening of the floor drain outer cover body through the filter cartridge sealing ring; a filter net is provided inside the sealing filter cartridge.

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