CN115262689A

CN115262689A - Domestic water-saving cistern

Info

Publication number: CN115262689A
Application number: CN202210496373.7A
Authority: CN
Inventors: 李牧蓉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-11-01

Abstract

A household water-saving water tank relates to the technical field of water saving and is used for collecting domestic water and leading the domestic water into a toilet water tank when needed. The water pumping device comprises a box body, wherein the top of the box body is provided with a box cover and a water inlet, and the water inlet is connected with a water pumping pipe; an exchange box communicated with the water inlet is arranged in the box body, and the lower wall of the exchange box is provided with a bottom hole communicated in a one-way; the upper side wall of the exchange box is connected with an air bag through a negative pressure pipe, and the top of the air bag is provided with a water pumping pedal; the bottom of the inner cavity of the box body is provided with a pressure box, the top of the pressure box is provided with a one-way conduction water replenishing pipe, the lower part of the inner cavity of the pressure box is connected with a water injection pipe through a one-way conduction water feeding pipe, one end of the water injection pipe is connected with the water feeding pipe, the other end of the water injection pipe extends into a water tank of a closestool, the pressure box is connected with another air bag through an air pipe, and the top of the other air bag is provided with a water injection pedal; the upper part of the box body is provided with an overflow port, and the overflow port is connected with the water injection pipe through an overflow pipe; the invention can realize the collection and the leading-in of domestic water into the toilet water tank.

Description

Domestic water-saving cistern

Technical Field

The invention relates to the technical field of water saving, in particular to a household water-saving water tank.

Background

Domestic water in families mainly comprises washing water, water for flushing a closestool, water for washing fruits and vegetables and water for washing clothes, wherein the water for washing clothes is dirty and is directly discharged through a floor drain, and the water cannot be used for a second time; the water for washing faces and hands and the water for washing fruits, vegetables and the like in the washing water can be generally used for washing the closestool for two times. In most families in real life, washing water is directly discharged through a hand basin, and water for washing fruits and vegetables is directly discharged through a vegetable basin. Some families collect water for washing fruits, vegetables and washing water through a water bucket for flushing the closestool, but the water is directly poured into the closestool for flushing the closestool, and the flushing is obviously not clean compared with the flushing by releasing the water in a water tank of the closestool.

Disclosure of Invention

The invention aims to provide a household water-saving water tank which is used for collecting water for washing fruits and vegetables and water for washing face and rinsing mouth and guiding the water for washing fruits and vegetables and the water for washing face and rinsing mouth into a water tank of a closestool for flushing the closestool when needed.

The technical scheme adopted by the invention for solving the technical problems is as follows: the household water-saving water tank comprises a tank body, wherein a tank cover and a water inlet are arranged at the top of the tank body, the water inlet is connected with one end of a water pumping pipe, and the other end of the water pumping pipe is used for stretching into a hand basin to pump water; the inner wall of the box body is provided with an exchange box communicated with the water inlet, the lower wall of the exchange box is provided with a bottom hole, and the lower surface of the exchange box is provided with a sealing element for realizing the unidirectional conduction of the bottom hole; the upper side wall of the exchange box is connected with an air bag through a negative pressure pipe, and the top of the air bag is provided with a water pumping pedal; the bottom of the inner cavity of the box body is provided with a closed pressure box, the top of the pressure box is provided with a one-way conduction water supplementing pipe, the lower part of the inner cavity of the pressure box is connected with a water injection pipe positioned at the upper part of the box body through the one-way conduction water feeding pipe, one end of the water injection pipe is connected with the water feeding pipe, the other end of the water injection pipe extends into a water tank of a closestool, the upper part of the inner cavity of the pressure box is connected with another air bag through an air pipe, the top of the other air bag is provided with a water injection pedal, and the two air bags can reset automatically after being compressed; the upper part of the box body is provided with an overflow port, and the overflow port is connected with the water injection pipe through an overflow pipe;

when the air bag below the water pumping pedal is gradually reset from a compressed state, the bottom hole is closed by the sealing element, air in the water pumping pipe and the exchange box enters the air bag, external water enters the water pumping pipe under the negative pressure effect and flows into the exchange box, and the bottom hole is opened by the sealing element under the water pressure effect so that the water enters the box body; the water injection pedal presses the other air bag downwards so that air in the other air bag enters the pressure box through the air pipe, and water in the pressure box is extruded to enter the water feeding pipe and the water injection pipe.

Further, the box inner chamber includes mutually independent installation cavity and water storage chamber, exchange box, pressure box, upper hose all are located the water storage intracavity, water injection pipe, trachea, overflow pipe, negative pressure pipe all are located the installation intracavity.

Further, still include filtering component, filtering component includes first filter cassette and the second filter cassette that is located water storage chamber upper portion, first filter cassette is located the bottom outlet below, the second filter cassette is located the case lid below.

Furthermore, the lower surface of the exchange box is provided with a sealing element, one end of the sealing element is fixedly bonded with the bottom of the exchange box, the sealing element is attached to the lower surface of the exchange box to seal the bottom hole, and the lower surface of the sealing element is provided with an elastic sheet.

Further, the gasbag is the bellows structure, the gasbag bottom has the base, the gasbag inboard has the spring, spring lower extreme and base fixed connection, spring upper end and pumping footboard or water injection footboard fixed connection.

Further, the base is internally provided with an air passage communicated with the air bag, the side wall of the base is provided with an air pipe connector, one end of the air pipe connector is connected with the air passage, and the other end of the air pipe connector is used for being connected with a negative pressure pipe or an air pipe.

Furthermore, a partition board is arranged on the inner side of the box body, and divides the inner cavity of the box body into an installation cavity and a water storage cavity; the overflow port is located on the partition plate, the side wall of the partition plate is provided with a sponge block right facing the overflow port, and the sponge block is located in the water storage cavity.

Furthermore, the lower end of one side wall of the box body is provided with a sunken part, two independent pedal cavities are arranged between the sunken part and the bottom of the box body, a fixing plate is arranged in each pedal cavity, and the lower end of each fixing plate is provided with a sliding chute; the water pumping pedal is positioned in one pedal cavity, the water injection pedal is positioned in the other pedal cavity, and the side walls of the water pumping pedal and the water injection pedal are provided with sliding blocks which are in sliding connection with the sliding grooves.

Furthermore, the inner wall of the upper end of the water storage cavity is provided with a gasket, the first filter box and the second filter box are placed in the square holes in the support, and the support is placed in the gasket.

Furthermore, an upper layer filter screen and a lower layer filter screen are arranged in the first filter box and the second filter box, and the aperture of the filter holes of the upper layer filter screen is larger than that of the filter holes of the lower layer filter screen.

Further, the drinking-water pipe is the hose, the one end of drinking-water pipe has the tip, the other end of drinking-water pipe has water pipe head, water pipe head and the connector threaded connection who is located the box top, connector and water inlet intercommunication.

Furthermore, check valves are arranged in the water replenishing pipe, the water feeding pipe and the air pipe.

The beneficial effects of the invention are: the household water-saving water tank provided by the invention has the following advantages:

(1) The water pumping pipe extends into the hand basin and sinks into water, and water in the hand basin can be pumped into the water tank to be stored by squeezing the air bag;

(2) The water for washing fruits and vegetables can be poured from the top of the box body and then stored;

(3) The first and second filter boxes are arranged in the box body, and can filter water entering the box body; meanwhile, the first filter box and the second filter box are convenient to disassemble and clean;

(4) The water pumping and water injection actions can be realized by stepping on the water pumping pedal or the water injection pedal, and the operation is convenient, simple and easy to operate;

(5) Water pumping and water injection are realized by manpower, and electric power is not needed as power; the manual drive is adopted the atmospheric pressure to realize drawing water and injecting water action down, simple structure, and damaged part is easily changed.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a right side view of the present invention;

FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;

FIG. 5 is a sectional view taken along line B-B of FIG. 3;

FIG. 6 is a front view of the housing of the present invention;

FIG. 7 is a cross-sectional view taken at C-C of FIG. 6;

FIG. 8 is a schematic view of a water pumping assembly;

FIG. 9 is a schematic view of the assembly of the case and the switch box;

FIG. 10 is a schematic view of the assembly of the pump pedal and bladder;

FIG. 11 is a top view of the bladder;

FIG. 12 is a schematic view of a water injection assembly;

FIG. 13 is a schematic view of the water flow direction within the fill assembly as the fill pedal is depressed;

FIG. 14 is a schematic view of water in the tank entering the fill assembly when the fill pedal is released;

FIG. 15 is a schematic view showing the flow direction of water among the washing water in the wash basin, the water for washing fruits and vegetables, the water tank and the toilet bowl;

FIG. 16 is a schematic view showing the assembly of the water injection pipe and the water supply pipe;

FIG. 17 is a cross-sectional view of a first filter cassette;

FIG. 18 is a front view of the separator plate;

in the figure: 1 box body, 10 box covers, 11 foot pads, 12 vertical plates, 121 pedal cavities, 13 sewage outlets, 14 partition plates, 141 installation cavities, 142 water storage cavities, 143 connecting pipes, 15 gaskets, 16 concave parts, 17 water inlets, 18 connectors, 19 overflow ports, 2 water pumping pipes, 21 tips, 22 water pipe connectors, 3 exchange boxes, 31 communicating holes, 32 bottom holes, 33 sealing parts, 34 elastic sheets, 35 negative pressure pipes, 4 air bags, 41 water pumping pedals, 41' water injection pedals, 411 sliding blocks, 42 bases, 43 springs, 44 air passages, 45 air pipe connectors, 46 fixing plates, 461 sliding chutes, 5 supports, 51 positioning plates, 52 first filter boxes, 53 second filter boxes, 54 sponge blocks, 6 water injection pipes, 61 water supply pipes, 62 overflow pipes, 63 pressure boxes, 64 water replenishing pipes, 65 one-way valves, 66 air pipes, 7 hand basins, 7 toilet water tanks and 72 basins.

Detailed Description

As shown in fig. 1 to 17, the present invention includes a case 1, a pumping unit, a filtering unit and a water filling unit, and the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the household water-saving tank comprises a tank body 1, a tank cover 10 and a water inlet 17 are arranged on the top of the tank body 1, and the inside of the tank body 1 can be checked, cleaned and maintained by opening the tank cover 10; as shown in fig. 15, water can be added to the tank 1 through the basin 72 by opening the cover 10. The water inlet 17 is connected with one end of the water pumping pipe 2, and the other end of the water pumping pipe 2 is used for stretching into the hand basin to pump water; the inner wall of the box body 1 is provided with an exchange box 3 communicated with the water inlet 17, the top of the exchange box 3 is provided with a communication hole 31, and the communication hole 31 is communicated with the water inlet 17 so as to realize the communication between the water inlet 17 and the exchange box 3. The lower wall of the exchange box 3 is provided with a bottom hole 32, and the lower surface of the exchange box 3 is provided with a sealing element 32 for realizing the unidirectional conduction of the bottom hole 32; the upper side wall of the exchange box 3 is connected with the air bag 4 through a negative pressure pipe 35, and the top of the air bag 4 is provided with a water pumping pedal 41; the bottom of the inner cavity of the box body 1 is provided with a closed pressure box 63, the top of the pressure box 63 is provided with a one-way conduction water replenishing pipe 64, the lower part of the inner cavity of the pressure box 63 is connected with a water injection pipe 6 positioned at the upper part of the box body 1 through a one-way conduction water feeding pipe 61, one end of the water injection pipe 6 is connected with the water feeding pipe 61, the other end of the water injection pipe 6 extends into a water tank of a closestool, the upper part of the inner cavity of the pressure box 63 is connected with another air bag 4 through a one-way conduction air pipe 66, the top of the other air bag 4 is provided with a water injection pedal 41', and the two air bags 4 can reset automatically after being compressed; the upper part of the box body 1 is provided with an overflow port 19, the overflow port 19 is connected with one end of an overflow pipe 62, as shown in fig. 16, the other end of the overflow pipe 62 is connected with a water injection pipe 6; when the water in the water tank 1 increases, the water at the liquid level overflows through the overflow port 19, enters the water injection pipe 6 through the overflow pipe 62, and then flows into the toilet tank 71 under gravity.

When the air bag 4 below the water pumping pedal 41 is gradually reset from a compressed state, the air bag 4 sucks air, at the moment, air in the exchange box 3 enters the air bag 4 through the negative pressure pipe 35, the sealing element 32 is in contact with the bottom of the exchange box 3 to close the bottom hole 32, and air in the water pumping pipe 2 enters the exchange box 3; external water enters the water pumping pipe 2 under the action of negative pressure, the water in the water pumping pipe 2 flows into the exchange box 3 along with the continuous resetting, expansion and air suction of the air bag 4, the sealing element 32 is extruded under the action of water pressure to form a gap between the sealing element 32 and the bottom of the exchange box 3, and then the bottom hole 32 is opened so that the water enters the box body 1 after passing through the bottom hole 32; as shown in fig. 13, stepping on the water filling pedal 41' presses down the other air bag 4 to make the air in the other air bag 4 enter the pressure box 63 through the air pipe 66, the air in the pressure box 63 increases, the pressure increases, and the water in the pressure box 63 is extruded to enter the water feeding pipe 61 and the water filling pipe 6, as shown in fig. 15, the water in the water filling pipe 6 flows into the toilet water tank 71; as shown in fig. 14, when the water injection pedal 41' is released, the air bag 4 is reset under the action of the spring 43, at this time, the air bag 4 sucks air, air in the pressure box 63 enters the air bag 4 through the air pipe 66, so that air is supplemented, when the air bag 4 is squeezed again, air is injected into the pressure box 63 to generate power to push water to enter the water feeding pipe 61; meanwhile, under the combined action of negative pressure and water pressure, the check valve 65 in the water replenishing pipe 64 is conducted, and water in the water tank 1 is replenished into the pressure box 63 through the water replenishing pipe 64.

Specifically, as shown in fig. 1 to 4, the bottom of the box body 1 is provided with a foot pad 11; when the toilet is installed, the box body 1 is placed in a toilet, and the height of the foot pad 11 is adjusted to keep the box body to be upright. Meanwhile, the height of the box body 1 can be adjusted through the foot pad 11. As shown in fig. 6 and 7, a vertically placed partition plate 14 is arranged inside the box body 1, the partition plate 14 divides the inner cavity of the box body 1 into an installation cavity 141 and a water storage cavity 142 which are independent of each other, the exchange box 3, the pressure box 63 and the water feeding pipe 61 are all located in the water storage cavity 142, and the water feeding pipe 6, the air pipe 66, the overflow pipe 62 and the negative pressure pipe 35 are all located in the installation cavity 141. The water storage cavity 142 is arranged and used for storing water; the installation cavity 141 is convenient for installation and maintenance of the water injection pipe 6, the air pipe 66, the overflow pipe 62 and the negative pressure pipe 35.

Specifically, the filter assembly is further included, and the filter assembly includes a first filter box 52 and a second filter box 53 which are positioned at the upper portion of the water storage chamber 142, wherein the first filter box 52 is positioned below the bottom hole 32, and the second filter box 53 is positioned below the cover 10. To facilitate the installation of the first and second filter cartridges, as shown in fig. 7, the inner wall of the upper end of the water storage cavity 142 is provided with a rectangular gasket 15, as shown in fig. 4, the bracket 5 is placed in the gasket 15, the bracket 5 is a rectangular plate, the bottom of the bracket 5 is provided with a positioning plate 51, and the positioning plate 51 is used for extending into the inner side of the gasket 15 to contact with the inner wall of the gasket 15 to position the bracket 5. The edge of the bracket 5 is put on the upper wall of the gasket 15, the bracket 5 is provided with two square holes for placing the first filter box 52 and the second filter box 53, as shown in fig. 17, the first filter box 52 is a rectangular structure, the upper end of the first filter box 52 is open, the width of the upper part of the first filter box 52 is larger than that of the lower part, the bottom of the first filter box 52 forms a lower filter screen 521, an upper filter screen 522 is placed at the intersection of the lower part and the middle part of the first filter box 52 and above the lower filter screen 521, and the aperture of the filter hole of the upper filter screen 522 is larger than that of the filter hole of the lower filter screen 521, so that primary filtration is realized by the upper filter screen 522, and secondary filtration is realized by the lower filter screen 521.

Specifically, as shown in fig. 9, the sealing member 33 is a rubber sheet located on the lower surface of the exchange box 3, one end of the sealing member 33 is fixedly bonded to the bottom of the exchange box 3, the sealing member 33 is attached to the lower surface of the exchange box 3 to seal the bottom hole 32, the lower surface of the sealing member 33 is provided with an elastic sheet 34, and the elastic sheet 34 is used for keeping the sealing member 33 in contact with the bottom of the exchange box 3.

Specifically, as shown in fig. 10, the airbag 4 has a bellows structure, and the bottom of the airbag 4 has a base 42, and the bottom of the base 42 is fixedly connected with the bottom of the case 1. As shown in FIG. 5, the inner side of the air bag 4 is provided with a spring 43, the lower end of the spring 43 is fixedly connected with the top of the base 42, and the upper end of the spring 43 is fixedly connected with the water pumping pedal 41 or the water filling pedal 41'. The side walls of the pumping step 41 and the filling step 41' have sliders 411. The lower end of one side wall of the box body 1 is provided with a concave part 16, a vertical plate 12 is arranged between the concave part 16 and the bottom of the box body 1, the vertical plate 12 is arranged to divide the space between the concave part 16 and the bottom of the box body 1 into two independent pedal cavities 121, a fixing plate 46 is arranged in each pedal cavity 121, and the lower end of each fixing plate 46 is provided with a sliding chute 461; the water pumping pedal 41 is located in one of the pedal cavities 121, the water filling pedal 41' is located in the other pedal cavity 121, and the sliding block 411 extends into the sliding slot 461 of the corresponding fixing plate 46 and is connected with the fixing plate 46 in a vertical sliding manner. Under the action of the spring 43, the air bag 4 is in an inflated state, and the slider 411 is located at the highest point of the sliding slot 461 as shown in fig. 8 and 12, the base 42 is internally provided with an air passage 44 communicated with the air bag 4, the side wall of the air base 42 is provided with an air pipe connector 45 communicated with the air passage 44, and the air pipe connector 45 is used for being connected with the negative pressure pipe 35 or the air pipe 66, so that the air passage 44 is connected with the negative pressure pipe 35 or the air pipe 66.

Specifically, the overflow port 19 is located on the partition 14, and as shown in fig. 4, the side wall of the partition 14 is provided with a sponge block 54 facing the overflow port 19, and the sponge block 54 is located in the water storage cavity 142. The sponge block 54 is used for adsorbing floating objects such as soap foam in the water storage cavity 142.

Specifically, the water pumping pipe 2 is a hose, one end of the water pumping pipe 2 is provided with a pointed end 21, the other end of the water pumping pipe 2 is provided with a water pipe connector 22, the water pipe connector 22 is in threaded connection with a connector 18 located at the top of the box body 1, and the connector 18 is communicated with the water inlet 17. The arrangement of the water pipe joint 22 and the connector 18 is convenient for the connection and the disassembly of the pumping pipe 2 and the tank body 1.

Specifically, in order to realize one-way conduction, the water replenishing pipe 64, the air pipe 66 and the water feeding pipe 61 are all provided with one-way valves, water can only enter the pressure box 63 from the outside of the pressure box 63 through the water replenishing pipe 64, and water cannot flow out of the pressure box 64 through the water replenishing pipe 64. Air can only enter the pressure box 63 from the air bag 4 through the air pipe 66 and can not reversely flow; water can only enter the water feeding pipe 61 from the pressure box 63, and cannot be reversed. In order to facilitate the discharge of the sediments at the bottom of the tank 1, as shown in fig. 1, the bottom of the side wall of the tank 1 is provided with a sewage discharge outlet 13. The drain outlet 13 can be opened according to the cleanness of the water in the tank 1 or/and at regular time to discharge the sediment at the bottom of the tank 1. In daily life, a plug can be installed at the sewage discharge outlet 13, and the plug can be removed when sewage discharge is needed. To facilitate the connection of the water supply pipe 61 and the water injection pipe 6, as shown in fig. 18, a connection pipe 143 is provided at an upper portion of the partition 14, one end of the connection pipe 143 is connected to one end (i.e., an upper end) of the water supply pipe 61, and the other end of the connection pipe 143 is connected to one end of the water injection pipe 6, as shown in fig. 12, and the other end (i.e., a lower end) of the water supply pipe 61 extends into the bottom of the inner cavity of the pressure cell 63.

As shown in fig. 15, when the water storage device is used, the tip 21 of the water pumping pipe 2 can be inserted into the hand basin 7, the tip 21 sinks in water, the water pumping pedal 41 is released after the water pumping pedal 41 is stepped on, then the water pumping pedal 41 automatically expands and resets, air in the exchange box 3 and the water pumping pipe 2 enters the air bag 4 below the water pumping pedal 41, water in the hand basin 7 enters the exchange box 3 under the action of negative pressure along with reduction of air in the water pumping pipe 2, the sealing element 33 is pressed to be separated from the bottom of the exchange box 3 after the water amount in the exchange box 3 is increased, and then water in the exchange box 3 flows downwards through the bottom hole 32, water flows into the first filter box 52 for filtering, and the filtered water flows into the water storage cavity 142 for storage. The box cover 10 is opened, water for washing fruits and vegetables can be poured into the box body 1 through the water basin 72, at the moment, the water flow for washing fruits and vegetables is filtered on the second filter box 53, and finally drops into the water storage cavity 142. When the water filling pedal 41' is stepped on, the water in the pressure case 63 is pressed into the water filling pipe 6, and the water in the water filling pipe 6 flows into the toilet tank 71 by gravity.

The household water-saving water tank provided by the invention has the following advantages:

(3) The first and second filter boxes are arranged in the box body and can filter water entering the box body; meanwhile, the first filter box and the second filter box are convenient to disassemble and clean;

Claims

1. The household water-saving water tank comprises a tank body and is characterized in that a tank cover and a water inlet are arranged at the top of the tank body, the water inlet is connected with one end of a water pumping pipe, and the other end of the water pumping pipe is used for stretching into a hand basin to pump water; the inner wall of the box body is provided with an exchange box communicated with the water inlet, the lower wall of the exchange box is provided with a bottom hole, and the lower surface of the exchange box is provided with a sealing element for realizing the unidirectional conduction of the bottom hole; the upper side wall of the exchange box is connected with an air bag through a negative pressure pipe, and the top of the air bag is provided with a water pumping pedal; the bottom of the inner cavity of the box body is provided with a closed pressure box, the top of the pressure box is provided with a one-way conduction water supplementing pipe, the lower part of the inner cavity of the pressure box is connected with a water injection pipe positioned at the upper part of the box body through the one-way conduction water feeding pipe, one end of the water injection pipe is connected with the water feeding pipe, the other end of the water injection pipe extends into a water tank of a closestool, the upper part of the inner cavity of the pressure box is connected with another air bag through an air pipe, the top of the other air bag is provided with a water injection pedal, and the two air bags can reset automatically after being compressed; the upper part of the box body is provided with an overflow port, and the overflow port is connected with the water injection pipe through an overflow pipe;

when the air bag below the water pumping pedal is gradually reset from a compressed state, the sealing element closes the bottom hole, air in the water pumping pipe and the exchange box enters the air bag, external water enters the water pumping pipe under the negative pressure effect and flows into the exchange box, and the sealing element is extruded by the water pressure effect to open the bottom hole so that the water enters the box body; the water injection pedal presses the other air bag downwards so that air in the other air bag enters the pressure box through the air pipe, and water in the pressure box is extruded to enter the water feeding pipe and the water injection pipe.

2. The household water-saving water tank as claimed in claim 1, wherein the inner chamber of the tank body comprises an installation chamber and a water storage chamber which are independent of each other, the exchange box, the pressure box and the water supply pipe are all located in the water storage chamber, and the water injection pipe, the air pipe, the overflow pipe and the negative pressure pipe are all located in the installation chamber.

3. The water-saving water tank for households as claimed in claim 2, further comprising a filter assembly including a first filter cartridge and a second filter cartridge located at an upper portion of the water storage chamber, wherein the first filter cartridge is located below the bottom hole, and the second filter cartridge is located below the tank cover.

4. The household water-saving water tank as claimed in claim 1, wherein the lower surface of the exchange box is provided with a sealing element, one end of the sealing element is fixedly bonded with the bottom of the exchange box, the sealing element is attached to the lower surface of the exchange box to seal the bottom hole, and the lower surface of the sealing element is provided with a spring sheet.

5. The household water-saving water tank as claimed in claim 1, wherein the air bag is of a bellows structure, the bottom of the air bag is provided with a base, the inner side of the air bag is provided with a spring, the lower end of the spring is fixedly connected with the base, and the upper end of the spring is fixedly connected with a water pumping pedal or a water injection pedal.

6. The household water-saving water tank as claimed in claim 5, wherein an air passage communicated with the air bag is arranged in the base, an air pipe joint is arranged on the side wall of the base, one end of the air pipe joint is connected with the air passage, and the other end of the air pipe joint is used for being connected with a negative pressure pipe or an air pipe.

7. The household water-saving water tank as claimed in claim 2, wherein a partition is provided inside the tank body, and divides the inner cavity of the tank body into an installation cavity and a water storage cavity; the overflow port is positioned on the partition plate, the side wall of the partition plate is provided with a sponge block which is just opposite to the overflow port, and the sponge block is positioned in the water storage cavity.

8. The household water-saving water tank as claimed in claim 1, wherein the lower end of one side wall of the tank body is provided with a depression, two independent pedal cavities are arranged between the depression and the bottom of the tank body, a fixing plate is arranged in the pedal cavities, and the lower end of the fixing plate is provided with a sliding chute; the water pumping pedal is positioned in one pedal cavity, the water injection pedal is positioned in the other pedal cavity, and the side walls of the water pumping pedal and the water injection pedal are provided with sliding blocks which are in sliding connection with the sliding grooves.

9. The household water-saving water tank as claimed in claim 3, wherein a gasket is arranged on the inner wall of the upper end of the water storage cavity, the first filter cartridge and the second filter cartridge are placed in square holes on a bracket, and the bracket is placed in the gasket; an upper layer of filter screen and a lower layer of filter screen are arranged in the first filter box and the second filter box, and the aperture of the filter holes of the upper layer of filter screen is larger than that of the filter holes of the lower layer of filter screen.

10. The household water-saving water tank as claimed in claim 1, wherein the water pumping pipe is a hose, one end of the water pumping pipe is provided with a pointed end, the other end of the water pumping pipe is provided with a water pipe connector, the water pipe connector is connected with a connector thread at the top of the tank body, and the connector is communicated with the water inlet.