Volume-variable small water dispenser and use method

Abstract

The invention discloses a volume-variable small water dispenser and a using method thereof, the volume-variable small water dispenser is mainly provided with an expansion box, the expansion box can be horizontally and movably connected with the side wall of a main box body, and the upper side of the expansion box is lower than the upper side of the main box body; a middle shell fixed to the center of an inner cavity of the main box body is further arranged, an inner cavity of the middle shell is arranged to be a water flow channel which circulates from bottom to top and is communicated with the bottom of the main water cavity, a circulating water pump and a filtering part used for filtering water are installed in the middle shell, and therefore drinking water can be fully filtered in the circulating flowing process. When the expansion box is pulled out outwards and used, the upper side of the expansion box is detachably provided with an expansion water disc used for drinking water, the height of the expansion water disc is lower than that of the main water supply disc, and the first water permeable holes face the interior of the expansion water disc downwards; when the expansion box is folded inwards, the expansion box is located in the main water cavity of the main box body, and the outward side wall of the expansion box seals the positioning hole.

Description

Technical Field

[0001] The invention relates to the technical field of water dispensers, and in particular to a small-sized water dispenser with a variable volume and a use method thereof. Background Art

[0002] Small water dispensers are widely used, with the characteristics of flexibility, compactness and convenience of movement. At present, the working volume of small water dispensers is fixed, with a high minimum water level limit, the minimum water level height is not less than 40 mm or the water consumption is not less than 750mL.

[0003] A Chinese patent application document is disclosed in the prior art, and the publication number is CN102362580A, which discloses a water feeder, which is composed of an open drinking water basin, a sealed water container, a sealed water container cover, and a vent pipe; there is a vent pipe between the open drinking water basin and the sealed water container, the sealed water container is located in the open drinking water basin, and the sealed water container cover is located on the top of the sealed water container; water is filled in the sealed water container, and a certain amount of water is filled in the open drinking water basin; when the water level in the open drinking water basin is higher than the vent pipe, due to the air pressure, the sealed water container is vented. The water in the container will not flow from the sealed water container to the open drinking water basin; when the water level in the open drinking water basin drops to the vent pipe, air will enter the sealed water container through the vent pipe, and the water in the sealed water container will flow out into the open drinking water basin due to the air pressure; when the water level in the open drinking water basin is replenished to a certain height, it will flood the vent pipe again, and air will not continue to enter the sealed water container from the vent pipe, and the water in the sealed water container will no longer flow into the open drinking water basin due to the atmospheric pressure, thereby ensuring that the water level in the open drinking water basin is always maintained at a certain height.

[0004] However, taking the above-mentioned prior art as an example, the fixed volume setting of the small water dispenser limits the use scope of the small water dispenser to a certain extent, and the excessively high minimum water level limits the use space of the small water dispenser. At the same time, the residual water in the water dispenser is easily contaminated. Summary of the invention

[0005] The purpose of the present invention is to provide a small-sized water dispenser with variable volume and a method of using the same, so as to solve the technical problems existing in the prior art.

[0006] The object of the present invention is achieved in this way: a small-sized water dispenser with variable volume, comprising:

[0007] A main box body, the inner cavity of which is configured as a main water cavity for containing drinking water;

[0008] An intermediate shell fixed to the center of the inner cavity of the main box body, wherein the inner cavity of the intermediate shell is configured as a water flow channel that flows from bottom to top and is connected to the bottom of the main water cavity, and a circulating water pump and a filter component for filtering water are installed inside the intermediate shell;

[0009] A main water supply tray for drinking water, the upper side of the main box body is set as an opening structure, the main water supply tray is detachably mounted on the upper opening of the main box body, the upper end of the intermediate shell passes through the main water supply tray, and a water supply nozzle is detachably mounted, the water supply nozzle is located above the main water supply tray and connected to the water flow channel of the intermediate shell, the water outlet end of the water supply nozzle faces the inner space of the main water supply tray, and the main water supply tray is provided with at least one first water permeable hole connected to the main water cavity;

[0010] An expansion box, the expansion box can be horizontally movably connected to the side wall of the main box body, and the upper side of the expansion box is lower than the upper side of the main box body, and the side wall of the main box body has a positioning hole that cooperates with the horizontal movement of the expansion box;

[0011] Among them, when the expansion box is pulled outward and used, an expansion water tray for drinking water is detachably installed on the upper side of the expansion box, the height of the expansion water tray is lower than the main water supply tray, and the first water permeable hole faces downward to the interior of the expansion water tray; when the expansion box is folded inward, the expansion box is in the main water cavity of the main box body, and the outer side wall of the expansion box is sealed with a positioning hole.

[0012] Furthermore, the expanded water tray is provided with a second water-permeable hole, the upper side of the expansion box is set as an opening, the expanded water tray covers the upper opening of the expansion box, the second water-permeable hole is connected to the inner cavity of the expansion box, and the inner side wall of the expansion box is provided with a plurality of water-passing grid holes, and the water-passing grid holes connect the inner cavity of the expansion box and the main water cavity.

[0013] Furthermore, a flexible sealing member is attached to the hole wall of the positioning hole, and the sealing member seals the matching gap between the expansion box and the positioning hole.

[0014] Furthermore, when the expansion box is retracted inwardly, the expansion water tray is separated from the upper opening of the expansion box so that the upper opening of the expansion box is completely connected with the main water cavity.

[0015] Furthermore, two water holes are provided at the bottom of the side wall of the intermediate shell, and a lower grille is installed on each water hole, wherein one of the water holes is opposite to the water grid hole and is close to the water grid hole when the expansion box is retracted inwards.

[0016] Furthermore, the filtering component comprises:

[0017] A filter medium for filtering water, wherein the filter medium is located at the suction side of the circulating water pump;

[0018] A filter body used for filtering water, wherein the filter body is located at the pump outlet side of a circulating water pump.

[0019] Furthermore, the upper end of the intermediate shell is provided with a detachable intermediate protrusion, the main water supply tray has a through mounting hole, the mounting hole of the main water supply tray is sealingly sleeved with the intermediate protrusion, the upper end of the intermediate protrusion is located above the main water supply tray, and is detachably connected to the water supply nozzle, the intermediate protrusion has an inner cavity which passes through from top to bottom, the inner cavity of the intermediate protrusion constitutes a part of the water flow channel of the intermediate shell, and is connected to the water supply nozzle.

[0020] Furthermore, a middle septum is fixed to the inner wall of the intermediate shell, the middle septum separates the filter body and the circulating water pump, and the middle septum is provided with a middle water hole for water to pass and facing the pump outlet side of the circulating water pump.

[0021] Furthermore, the bottom wall of the main water supply tray is configured as an inclined surface, the first water permeable hole is located at the lowest point of the bottom wall of the main water supply tray, and the water supply nozzle is located at the highest point of the bottom wall of the main water supply tray.

[0022] As another aspect of the present invention, based on the above-mentioned small-sized variable-volume water dispenser, a method of use is provided, the method including switchable extended water supply state and non-extended water supply state.

[0023] In the extended water supply state, perform the following steps:

[0024] Steps for installing the expansion water tray: pull the expansion box outward for a distance, and then cover the expansion water tray on the upper opening of the expansion box so that the first water permeable hole of the main water supply tray faces downward to the inside of the expansion water tray;

[0025] Steps for expanding water supply, note that the water level in the main water chamber does not exceed the upper side of the expansion box, use the circulating water pump to pump the drinking water in the main water chamber into the intermediate housing, so that the drinking water enters the circulating water pump after being filtered by the lower grid and the filter medium, and the circulating water pump pumps water out from bottom to top, and the drinking water is filtered by the filter body and then splashed into the main water supply tray through the water supply nozzle, so that the main water supply tray is the first drinking water area, and the remaining water flows downward through the first water permeable hole into the expanded water tray, so that the expanded water tray is the second drinking water area;

[0026] The controller is used to control the operation of the circulating water pump so that the water supply expansion step is repeated multiple times;

[0027] In the expansion water supply step, the remaining water in the expansion water tray flows downward into the bottom of the expansion box inner cavity through the second water permeable hole. During the water absorption process of the circulating water pump, the water in the expansion box inner cavity enters the main water cavity through the water grid holes and is sucked by the circulating water pump.

[0028] There are two first water permeable holes, one of which faces the inner cavity of the expansion box, and the other faces the main water cavity;

[0029] In the non-expanded water supply state, perform the following steps:

[0030] Remove the expansion water tray, push the expansion box into the main water cavity of the main box body, so that the outer wall of the expansion box covers and seals the positioning hole of the side wall of the main box body, and then fill the main water cavity with water;

[0031] A circulating water pump is used to pump drinking water in the main water cavity into the intermediate shell, so that the drinking water enters the circulating water pump after being filtered by the lower grid and the filter medium. The circulating water pump pumps water out from bottom to top. After the drinking water is filtered by the filter body, it is splashed into the main water supply tray through the water supply nozzle, so that the main water supply tray serves as the drinking water area, and the remaining water flows downward into the inner cavity of the expansion box and the main water cavity through the two first water permeable holes.

[0032] The beneficial effects of the present invention are:

[0033] 1. An expansion box is provided, which can be pulled outward and used. An expansion water tray for drinking water is detachably installed on the upper side of the expansion box. The height of the expansion water tray is lower than the main water supply tray. The first water permeable hole faces downward to the inside of the expansion water tray, so as to guide the water sprayed from the water supply nozzle to flow into the expansion water tray for drinking, thereby expanding the choice of drinking;

[0034] 2. Drinking water can be fully filtered in the circulation flow, and the filter medium and filter body are comprehensively utilized to filter the water to solve the problem of water pollution existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the expanded water supply state of the present invention.

[0036] Figure 2 It is a schematic diagram of the non-expanded water supply state of the present invention.

[0037] Figure 3 This is a schematic diagram of the location of the expansion box from a side perspective. DETAILED DESCRIPTION

[0038] The following will be combined with the attached embodiment of the present invention Figure 1-3 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-3 As shown, a small water dispenser with variable volume is proposed, comprising:

[0040] The main box body 1 has an inner cavity configured as a main water cavity 1a for containing drinking water. In actual use, the main box body 1 may be provided with an openable and closable pipe interface for conveying water into the main water cavity 1a to replenish drinking water in time;

[0041] The intermediate housing 2 is fixed at the center of the inner cavity of the main box body 1. The inner cavity of the intermediate housing 2 is set as a water flow channel that flows from bottom to top and is connected to the bottom of the main water cavity 1a. The intermediate housing 2 is equivalent to a circular pipe, which is upright and fixed at the center of the inner cavity of the main box body 1 and extends upward to the upper side of the main box body 1. A circulating water pump 4 and a filtering component for filtering water are installed inside the intermediate housing 2, which can filter water during the water circulation process;

[0042] A main water supply tray 7 for drinking water, the upper side of the main box body 1 is set as an opening structure, the main water supply tray 7 is detachably mounted on the upper opening of the main box body 1, the upper end of the intermediate shell 2 passes through the main water supply tray 7, and a water supply nozzle 6 is detachably mounted, the water supply nozzle 6 is located above the main water supply tray 7 and is connected to the water flow channel of the intermediate shell 2, the water outlet end of the water supply nozzle 6 faces the inner space of the main water supply tray 7, and the main water supply tray 7 is provided with at least one first water permeable hole 7a connected to the main water chamber 1a;

[0043] The expansion box 9 can be horizontally movably connected to the side wall of the main box body 1, and the upper side of the expansion box 9 is lower than the upper side of the main box body 1. The outer side wall of the expansion box 9 is equipped with a push-pull handle 11 (such as Figure 3 As shown), it is used to push and pull the expansion box 9. The side wall of the main box body 1 has a positioning hole 1b that cooperates with the horizontal movement of the expansion box 9. The bottom of the expansion box 9 is close to the bottom of the main box body 1. The expansion box 9 can be pulled outward or folded inward like a drawer.

[0044] Among them, Figure 1 As shown, when the expansion box 9 is pulled outward and used, an expansion water tray 8 for drinking water is detachably mounted on the upper side of the expansion box 9. The height of the expansion water tray 8 is lower than the main water supply tray 7, and the first water permeable hole 7a faces downward to the inside of the expansion water tray 8; Figure 2 As shown, when the expansion box 9 is retracted inward, the expansion box 9 is in the main water chamber 1a of the main box body 1, and the outer side wall of the expansion box 9 seals the positioning hole 1b to prevent the drinking water in the main water chamber 1a from leaking.

[0045] The above-mentioned expanded water tray 8 is provided with a second water permeable hole 8a, the upper side of the expansion box 9 is set as an opening, the expanded water tray 8 covers the upper opening of the expansion box 9, the second water permeable hole 8a is connected with the inner cavity of the expansion box 9, and the inner side wall of the expansion box 9 is provided with a plurality of water grid holes 9a, and the water grid holes 9a connect the inner cavity of the expansion box 9 and the main water cavity 1a.

[0046] A flexible sealing member 10 is attached to the hole wall of the positioning hole 1b, and the sealing member 10 seals the matching gap between the expansion box 9 and the positioning hole 1b, thereby ensuring the sealing effect.

[0047] When the expansion box 9 is retracted inward, the expansion water tray 8 is separated from the upper opening of the expansion box 9 so that the upper opening of the expansion box 9 is completely connected with the main water chamber 1a.

[0048] Two water holes are provided at the bottom of the side wall of the above-mentioned intermediate shell 2, and a lower grille 2a is installed on each water hole, one of which is opposite to the water grid hole 9a and is close to the water grid hole 9a when the expansion box 9 is folded inward, so that the water in the expansion box 9 can be fully filtered.

[0049] In order to fully filter the water on the suction side and the discharge side of the circulating water pump 4, the filtering component includes:

[0050] A filter medium 3 for filtering water, the filter medium 3 being located at the suction side of a circulating water pump 4;

[0051] The filter body 5 is used for filtering water, and the filter body 5 is located at the pump outlet side of the circulating water pump 4.

[0052] In addition, the upper end of the intermediate shell 2 is provided with a detachable intermediate protrusion 2c, which is thinner than the main part of the intermediate shell 2 so as to dock with the water supply nozzle 6. The main water supply disk 7 has a through mounting hole, and the mounting hole of the main water supply disk 7 is sealingly sleeved with the intermediate protrusion 2c to prevent water leakage. The upper end of the intermediate protrusion 2c is located above the main water supply disk 7 and is detachably connected (threaded or clamped) to the water supply nozzle 6. The intermediate protrusion 2c has an inner cavity that passes through from top to bottom, and the inner cavity of the intermediate protrusion 2c constitutes a part of the water flow channel of the intermediate shell 2 and is connected to the water supply nozzle 6.

[0053] As a preferred installation scheme, a middle partition 2b is fixed to the inner wall of the intermediate shell 2, and the middle partition 2b separates the filter body 5 and the circulating water pump 4. The middle partition 2b is provided with a middle water hole 2d for water flow and facing the pump outlet side of the circulating water pump 4.

[0054] The bottom wall of the main water supply tray 7 is set as an inclined surface (conical inclined surface), the first water permeable hole 7a is located at the lowest point of the bottom wall of the main water supply tray 7 (the edge of the conical inclined surface), and the water supply nozzle 6 is located at the highest point of the bottom wall of the main water supply tray 7 (the center of the conical inclined surface). When the small animals drink water, the water in the main water supply tray 7 is in a state of continuous flow.

[0055] Based on the above-mentioned small water dispenser, a method of use is provided, which includes an expanded water supply state and a non-expanded water supply state that can be switched for execution.

[0056] like Figure 1As shown, in the extended water supply state, the following steps are performed:

[0057] The step of installing the expansion water tray 8 is to pull the expansion box 9 outward for a distance, and then cover the expansion water tray 8 on the upper opening of the expansion box 9, so that the first water permeable hole 7a of the main water supply tray 7 faces the interior of the expansion water tray 8 downward;

[0058] In the step of expanding the water supply, it is noted that the water level in the main water chamber 1a does not exceed the upper side of the expansion box 9. The circulating water pump 4 is used to pump the drinking water in the main water chamber 1a into the intermediate housing 2, so that the drinking water enters the circulating water pump 4 after being filtered by the lower grid 2a and the filter medium 3. The circulating water pump 4 pumps the water out from bottom to top. After the drinking water is filtered by the filter body 5, it is splashed into the main water supply tray 7 through the water supply nozzle 6, so that the main water supply tray 7 is the first drinking water area. The remaining water flows downward into the expansion water tray 8 through the first water permeable hole 7a, so that the expansion water tray 8 is the second drinking water area, and water can be given to small animals;

[0059] The controller is used to control the operation of the circulating water pump 4, so that the step of expanding the water supply is repeated multiple times;

[0060] In the expansion water supply step, the remaining water in the expansion water tray 8 flows downward into the bottom of the inner cavity of the expansion box 9 through the second water permeable hole 8a. During the water absorption process of the circulating water pump 4, the water in the inner cavity of the expansion box 9 enters the main water cavity 1a through the water grid hole 9a and is sucked by the circulating water pump 4 for circulation and filtration.

[0061] There are two first water-permeable holes 7a, one of which faces the inner cavity of the expansion box 9, and the other of which faces the main water cavity 1a.

[0062] like Figure 2 As shown, in the non-expanded water supply state, the following steps are performed:

[0063] Remove the expansion water tray 8, push the expansion box 9 into the main water cavity 1a of the main box body 1, so that the outer wall of the expansion box 9 covers and seals the positioning hole 1b of the side wall of the main box body 1, and then fill the main water cavity 1a with water;

[0064] The drinking water in the main water chamber 1a is pumped into the intermediate shell 2 by the circulating water pump 4, so that the drinking water enters the circulating water pump 4 after being filtered by the lower grid 2a and the filter medium 3. The circulating water pump 4 pumps water out from bottom to top. After the drinking water is filtered by the filter body 5, it is splashed into the main water supply tray 7 through the water supply nozzle 6, so that the main water supply tray 7 becomes the drinking water area, and the remaining water flows downward through the two first water permeable holes 7a into the inner cavity of the expansion box 9 and the main water chamber 1a, thereby circulating and filtering.

[0065] Therefore, in the above-mentioned expanded water supply state and non-expanded water supply state, circulation and filtration are the basic processes. After the water supply nozzle 6 discharges water, the remaining water that is not drunk flows back to the main water chamber 1a through the first water permeable hole 7a. Under the suction action of the circulating water pump 4, the water enters the circulating water pump 4 through the filtering action of the lower grille 2a and the filter medium 3, and then is output upward through the filtering action of the filter body 5; this process is repeated in this way, which can solve the problem of water pollution existing in the prior art.

[0066] The water supply nozzle 6 and the main water supply tray can be removed for cleaning, and the inner wall of the main box body 1 can be cleaned.

[0067] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0068] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0069] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A small water dispenser with variable volume, characterized in that: include: A main box body (1), the inner cavity of which is configured as a main water cavity (1a) for containing drinking water; An intermediate housing (2) is fixed at the center of the inner cavity of the main box body (1), the inner cavity of the intermediate housing (2) is configured as a water flow channel that flows from bottom to top and is connected to the bottom of the main water cavity (1a), and a circulating water pump (4) and a filter component for filtering water are installed inside the intermediate housing (2); A main water supply tray (7) for drinking water, the upper side of the main box body (1) is set as an opening structure, the main water supply tray (7) is detachably mounted on the upper opening of the main box body (1), the upper end of the intermediate shell (2) passes through the main water supply tray (7), and is detachably mounted with a water supply nozzle (6), the water supply nozzle (6) is located above the main water supply tray (7) and is connected to the water flow channel of the intermediate shell (2), the water outlet end of the water supply nozzle (6) faces the inner space of the main water supply tray (7), and the main water supply tray (7) is provided with at least one first water permeable hole (7a) connected to the main water chamber (1a); An expansion box (9), the expansion box (9) being horizontally movable and connected to the side wall of the main box body (1), and the upper side of the expansion box (9) being lower than the upper side of the main box body (1), and the side wall of the main box body (1) having a positioning hole (1b) for horizontally movable cooperation with the expansion box (9); When the expansion box (9) is pulled outward and used, an expansion water tray (8) for drinking water is detachably mounted on the upper side of the expansion box (9), the height of the expansion water tray (8) is lower than the main water supply tray (7), and the first water permeable hole (7a) faces downwardly toward the inside of the expansion water tray (8); when the expansion box (9) is retracted inwardly, the expansion box (9) is in the main water cavity (1a) of the main box body (1), and the outer side wall of the expansion box (9) is sealed with a positioning hole (1b).

2. A small-sized water dispenser with variable volume according to claim 1, characterized in that: The expansion water tray (8) is provided with a second water permeable hole (8a), the upper side of the expansion box (9) is set as an opening, the expansion water tray (8) covers the upper opening of the expansion box (9), the second water permeable hole (8a) is connected with the inner cavity of the expansion box (9), and the inner side wall of the expansion box (9) is provided with a plurality of water-passing grid holes (9a), and the water-passing grid holes (9a) are connected with the inner cavity of the expansion box (9) and the main water cavity (1a).

3. A small-sized water dispenser with variable volume according to claim 1, characterized in that: A flexible sealing member (10) is attached to the hole wall of the positioning hole (1b), and the sealing member (10) seals the matching gap between the expansion box (9) and the positioning hole (1b).

4. A small-sized water dispenser with variable volume according to claim 2, characterized in that: When the expansion box (9) is retracted inward, the expansion water tray (8) is separated from the upper opening of the expansion box (9) so that the upper opening of the expansion box (9) is completely connected to the main water chamber (1a).

5. A small-sized water dispenser with variable volume according to claim 4, characterized in that: The bottom of the side wall of the intermediate shell (2) is provided with two water holes, and a lower grille (2a) is installed on each water hole, wherein one of the water holes is opposite to the water grid hole (9a) and is close to the water grid hole (9a) when the expansion box (9) is retracted inwards.

6. A small-sized water dispenser with variable volume according to claim 5, characterized in that: The filter component comprises: A filter medium (3) for filtering water, wherein the filter medium (3) is located at the suction side of a circulating water pump (4); A filter body (5) for filtering water, wherein the filter body (5) is located at the pump outlet side of a circulating water pump (4).

7. A small-sized water dispenser with variable volume according to claim 1, characterized in that: The upper end of the intermediate shell (2) is provided with a detachable intermediate protrusion (2c); the main water supply disk (7) has a through mounting hole; the mounting hole of the main water supply disk (7) is sealed and sleeved with the intermediate protrusion (2c); the upper end of the intermediate protrusion (2c) is located above the main water supply disk (7) and is detachably connected to the water supply nozzle (6); the intermediate protrusion (2c) has an inner cavity that passes through from top to bottom; the inner cavity of the intermediate protrusion (2c) constitutes a part of the water flow channel of the intermediate shell (2) and is connected to the water supply nozzle (6).

8. A small-sized water dispenser with variable volume according to claim 6, characterized in that: A middle septum (2b) is fixed to the inner wall of the intermediate housing (2), the middle septum (2b) separating the filter body (5) from the circulating water pump (4), and the middle septum (2b) is provided with a middle water hole (2d) for water flow and facing the pump outlet side of the circulating water pump (4).

9. A small-sized water dispenser with variable volume according to any one of claims 1 to 8, characterized in that: The bottom wall of the main water supply tray (7) is configured as an inclined surface, the first water permeable hole (7a) is located at the lowest point of the bottom wall of the main water supply tray (7), and the water supply nozzle (6) is located at the highest point of the bottom wall of the main water supply tray (7).

10. A method for using the small-sized variable-volume water dispenser according to claim 6, characterized in that: Includes switchable extended water supply state and non-extended water supply state; In the extended water supply state, the following steps are performed: The step of installing the expansion water tray (8) is to pull the expansion box (9) outward for a certain distance, and then cover the expansion water tray (8) on the upper opening of the expansion box (9) so that the first water permeable hole (7a) of the main water supply tray (7) faces downward to the inside of the expansion water tray (8); Steps for expanding water supply, paying attention to the water level in the main water chamber (1a) not exceeding the upper side of the expansion box (9), using the circulating water pump (4) to pump the drinking water in the main water chamber (1a) into the intermediate housing (2), so that the drinking water enters the circulating water pump (4) after being filtered by the lower grid (2a) and the filter medium (3), and the circulating water pump (4) pumps water out from bottom to top, and after the drinking water is filtered by the filter body (5), it is splashed into the main water supply tray (7) through the water supply nozzle (6), so that the main water supply tray (7) becomes the first drinking water area, and the remaining water flows downward through the first water permeable hole (7a) into the expanded water tray (8), so that the expanded water tray (8) becomes the second drinking water area; The controller is used to control the operation of the circulating water pump (4) so ​​that the step of expanding the water supply is repeated multiple times; In the step of expanding water supply, the remaining water in the expansion water tray (8) flows downwardly into the bottom of the inner cavity of the expansion box (9) through the second water permeable hole (8a), and during the water absorption process of the circulating water pump (4), the water in the inner cavity of the expansion box (9) enters the main water cavity (1a) through the water grid hole (9a) and is sucked by the circulating water pump (4); Two first water permeable holes (7a) are provided, one of which is directly opposite to the inner cavity of the expansion box (9), and the other first water permeable hole (7a) is directly opposite to the main water cavity (1a); In the non-expanded water supply state, the following steps are performed: Remove the expansion water tray (8), push the expansion box (9) into the main water chamber (1a) of the main box body (1), so that the outer side wall of the expansion box (9) covers and seals the positioning hole (1b) on the side wall of the main box body (1), and then fill the main water chamber (1a) with water; The drinking water in the main water chamber (1a) is pumped into the intermediate housing (2) by a circulating water pump (4), so that the drinking water enters the circulating water pump (4) after being filtered by the lower grid (2a) and the filter medium (3). The circulating water pump (4) pumps water out from bottom to top. After being filtered by the filter body (5), the drinking water is sprayed into the main water supply tray (7) through the water supply nozzle (6), so that the main water supply tray (7) becomes a drinking water area. The remaining water flows downward through the two first water permeable holes (7a) into the inner cavity of the expansion box (9) and the main water chamber (1a).

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