Portable water purifier

Abstract

The utility model discloses a portable water purifier. The portable water purifier comprises a filtering unit and a power device, wherein the filtering unit comprises a raw water inlet and a purified water outlet; the power device comprises a shell and at least one piston movably arranged in the shell, two pressure cavities are defined by the piston and the shell, each pressure cavity is correspondingly provided with a raw water inlet and a raw water outlet, the raw water outlet is communicated with the raw water inlet, and the piston moves back and forth in the shell to enable each pressure cavity to be switched between a negative pressure state and a positive pressure state; and in the back-and-forth movement process of the piston, one of the two pressure cavities is in a negative pressure state, and the other pressure cavity is correspondingly in a positive pressure state. According to the portable water purifier provided by the invention, in the back-and-forth movement process of the piston, the two pressure cavities alternately convey raw water to the filtering unit, so that the filtering unit can continuously discharge water, the problem of discontinuous water discharge is solved, the water discharge flow is favorably increased, the water discharge amount in unit time is large, and the operation is more time-saving and labor-saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purification, in particular to a portable water purifier. BACKGROUND

[0002] The water purifiers on the market are various, but mainly divided into electric water purifiers and non-electric water purifiers. The electric water purifier needs to be connected to the power supply for use, and the non-electric water purifier is used without connecting to the power supply. Among them, the portable water purifier is more common in non-electric water purifiers. The portable water purifier is usually used for field or outdoor work, filters and sterilizes the field or outdoor water source, and is commonly used for military personnel, rescue work, and outdoor workers.

[0003] The common single-cylinder water purifier on the market usually includes a filtering part and a pressurizing part, wherein the pressurizing part is single-cylinder, that is, one pressure chamber is matched with one piston. For example, the patent specification with publication number CN112661281A discloses a portable water purifier structure, which includes a kettle body and a piston assembly. The kettle body is provided with a pull rod cavity and a filter core cavity, and the pull rod cavity and the filter core cavity are in communication with each other. The kettle body is provided with a water outlet communicating with the filter core cavity and a water inlet communicating with the pull rod cavity. The piston assembly includes a piston rod and a piston. One end of the piston rod is connected with the piston, and the other end of the piston rod is placed outside the kettle body. The piston is movably placed in the pull rod cavity. In the above scheme, the piston can only produce water when it is pressed down. The piston moves upward in the water absorption state, and no water is produced at this time. This makes the water production discontinuous, and the water production per unit time is low. At the same time, the pressurizing structure is single-cylinder structure, and the volume of the cylinder body is small, so the water production is further limited. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a portable water purifier. Through the synchronous and alternating action of the double pistons, the water inlet continuity and the water outlet continuity of the water purifier are ensured, and the water production per unit time of the water purifier is improved.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A portable water purifier includes a filtering unit and a power device. The filtering unit includes a raw water inlet and a purified water outlet. The power device includes a shell and at least one piston movably arranged in the shell. The piston and the shell enclose two pressure chambers. Each pressure chamber is provided with a raw water inlet and a raw water outlet. The raw water outlet is connected to the raw water inlet. The piston moves back and forth in the shell to switch each pressure chamber between negative pressure state and positive pressure state. During the movement of the piston, one of the two pressure chambers is in negative pressure state, and the other is in positive pressure state.

[0007] The portable water purifier in the application further has the following additional technical features:

[0008] The power device comprises two pistons, each of which forms a pressure chamber with the shell, and the two pistons are connected through a linkage structure to drive the two pistons to move alternately.

[0009] The linkage structure comprises a linkage rod and a support seat, the support seat is fixedly installed on the shell, the linkage rod has a connecting part and linkage parts on both sides of the connecting part, the connecting part is pivotally connected with the support seat, and two pistons are connected with two linkage parts one by one.

[0010] The support seat comprises a bottom plate and two support plates vertically arranged on the bottom plate, the bottom plate is connected with the shell, the connecting part is clamped between the two support plates and is pivotally connected with the support plates through a rotating shaft.

[0011] The linkage structure further comprises a connecting rod, one end of the connecting rod is pivotally connected with the linkage part, and the other end is fixedly connected with the piston, so that the linkage rod drives the piston to move back and forth through the connecting rod.

[0012] The linkage structure further comprises an operating handle connected with the end of the linkage rod.

[0013] The shell is provided with a limiting rib protruding into the pressure chamber, the piston can be stopped by stopping against the limiting rib during movement in the direction of making the pressure chamber into a positive pressure state, a plurality of limiting ribs are arranged at intervals along the circumference of the shell, and the raw water inlet is opened between two adjacent limiting ribs.

[0014] A control valve is arranged in the raw water inlet and the raw water outlet respectively, the control valve is configured to open the raw water inlet and close the raw water outlet when the pressure chamber is in a negative pressure state, and is configured to open the raw water outlet and close the raw water inlet when the pressure chamber is in a positive pressure state.

[0015] The control valve is a check valve comprising a valve shell, a valve core and a spring, the valve core is installed in the water flow channel provided in the valve shell, the spring is arranged between the valve core and the valve shell, and the valve core can switch between the positions of closing the water flow channel and opening the water flow channel under force.

[0016] The filter unit comprises a base, a filter core mounted on the base, and a sleeve shell sleeved outside the filter core, the shell comprises a connecting seat and a piston barrel integrally connected with the connecting seat, the piston is arranged in the piston barrel, the upper and lower ends of the sleeve shell are arranged in an open manner, the lower end of the sleeve shell is threadedly connected with the base, and the connecting seat is threadedly connected with the upper end of the sleeve shell.

[0017] Thanks to the above technical scheme, the application has the following technical effects:

[0018] 1. The portable water purifier provided by the application is used for the user to pressurize and operate, so as to pressurize and deliver external raw water into the filter unit, and output the raw water after being filtered into clean water in the filter unit. Specifically, the power device forms two pressure cavities by cooperating with the shell through the piston. During the reciprocating movement of the piston in the shell, one of the two pressure cavities is in a negative pressure state, and the other is in a corresponding positive pressure state. Therefore, for the pressure cavity in the negative pressure state, the raw water inlet of the pressure cavity in the negative pressure state can be selectively controlled to be opened, and the raw water outlet can be selectively controlled to be closed. At this time, the power device can draw water from the external water source connected to the raw water inlet into the pressure cavity for storage. When the pressure cavity changes from the negative pressure state to the positive pressure state, the raw water inlet can be selectively controlled to be closed, and the raw water outlet can be selectively controlled to be opened. Since the raw water outlet is in communication with the raw water inlet, the raw water stored in the pressure cavity can enter the filter unit for filtration under the action of the positive pressure and the pushing action of the piston. Therefore, since the pressure states of the two pressure cavities are always opposite, when one of the pressure cavities in the negative pressure state obtains raw water from the external water source, the other pressure cavity in the positive pressure state can deliver raw water to the filter unit. The two pressure cavities alternately deliver raw water to the filter unit, so that the filter unit can continuously output water during the reciprocating movement of the piston, thereby solving the problem of intermittent water output, helping to increase the water output flow, and increasing the water output per unit time, so that the portable water purifier is more time-saving and labor-saving.

[0019] 2. As a preferred mode of the application, the two pistons respectively form a pressure cavity with the shell. In order to simultaneously control the actions of the two pistons and form alternating reciprocating movements, one of the two pressure cavities is in a negative pressure state, and the other is in a positive pressure state. Therefore, by connecting the two pistons through a linkage structure, the alternating reciprocating movements of the two pistons can be realized by driving the linkage structure, which helps to simplify the structure and improve the operation convenience.

[0020] 3. As a preferred mode of the present application, the support seat is fixed with the shell, the linkage rod is pivotally connected with the support seat through the connecting part, and the two pistons are connected with the two linkage parts one by one. Since the two linkage parts are respectively located on the two sides of the connecting part, when the connecting part rotates relative to the support seat, the two linkage parts form an alternating back-and-forth movement in the form of one up and one down. When one of the pistons moves towards the pressure cavity, the corresponding pressure cavity becomes a positive pressure state, and when the other pressure cavity moves away from the pressure cavity, the corresponding pressure cavity becomes a negative pressure state. The user only needs to control the rotation of the linkage rod to realize the linkage of the two pistons, which is convenient to operate and improves the use effect.

[0021] 4. As a preferred mode of the present application, one end of the connecting rod is pivotally connected with the linkage part, and the other end is fixedly connected with the piston. When the linkage rod rotates around the support seat, the connecting rod is ensured to move linearly to drive the piston to move linearly through the pivotal connection with the connecting rod. Therefore, the back-and-forth stroke of the piston relative to the shell is a linear stroke, the operation is more stable, and the pressure cavity can be a simple cylinder or column as a whole, simplifying the structure.

[0022] 5. As a preferred mode of the present application, the piston can be stopped by the limiting rib during movement in the direction of making the pressure cavity a negative pressure state. On the one hand, the movement of the piston is stopped, forming a limit position of the piston. On the other hand, after the piston is stopped by the limiting rib, the pressure cavity still retains a part of space, which is ensured to be communicated with the raw water inlet, so that when the piston moves towards the direction of making the pressure cavity a negative pressure, the external water source can enter the pressure cavity through the raw water inlet.

[0023] 6. As a preferred mode of the present application, control valves are respectively arranged in the raw water inlet and the raw water outlet. The control valves are configured to open the raw water inlet and close the raw water outlet when the pressure cavity is in a negative pressure state, and are configured to open the raw water outlet and close the raw water inlet when the pressure cavity is in a positive pressure state. Therefore, when the pressure cavity is in a negative pressure state, the raw water inlet is opened to communicate the external water source with the pressure cavity, and the raw water outlet is closed to cut off the communication between the filter unit and the pressure cavity, so that the external raw water can enter the pressure cavity. When the pressure cavity is in a positive pressure state, the raw water inlet is closed to cut off the communication between the external water source and the pressure cavity, and the raw water outlet is opened to communicate the filter unit with the pressure cavity, so that the raw water in the pressure cavity can enter the filter unit for filtration. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 The assembly drawing of the portable water purifier provided by the embodiments of the present application;

[0026] Figure 2 This is an exploded view of the portable water purifier provided in the embodiments of this application;

[0027] Figure 3 A cross-sectional view of the portable water purifier provided in the embodiments of this application. Figure 1 ;

[0028] Figure 4 A cross-sectional view of the portable water purifier provided in the embodiments of this application. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the linkage provided in the embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the support base provided in the embodiments of this application;

[0031] Figure 7 This is a schematic diagram of the piston structure provided in an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the connecting rod provided in an embodiment of this application;

[0033] Figure 9 A cross-sectional view of the portable water purifier provided in the embodiments of this application. Figure 3 ;

[0034] Figure 10 for Figure 9 A magnified view of the structure at point A in the middle;

[0035] Figure 11 A schematic diagram of the shell structure provided in the embodiments of this application. Figure 1 ;

[0036] Figure 12 A schematic diagram of the shell structure provided in the embodiments of this application. Figure 2 .

[0037] List of components and reference numerals:

[0038] 1. Filter unit, 11. Raw water inlet, 12. Clean water outlet, 13. Base, 14. Filter element, 15. Housing;

[0039] 2. Housing, 21. Connecting seat, 22. Piston cylinder, 221. Limiting rib;

[0040] 3 pistons;

[0041] 4 pressure chambers, 41 raw water inlet, 42 raw water outlet;

[0042] 5 linkage rods, 51 connecting part, 52 linkage part;

[0043] 6 support seat, 61 bottom plate, 62 support plate;

[0044] 7 connecting rod;

[0045] 8 operating handle;

[0046] 9 control valve, 91 valve housing, 92 valve core, 93 spring. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0048] In the following description, a number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than in the examples described herein, and therefore the scope of the present application is not limited to the specific examples described herein.

[0049] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0052] In the embodiments of the present application, a portable water purifier is provided. For the convenience of illustration and understanding, the following content provided by the present application is described on the basis of the structure of the product. Of course, those skilled in the art can understand that the above structure is only a specific example and illustrative description, and cannot constitute a specific limitation on the technical solutions provided by the present application.

[0053] Referring to Figures 1 to 12 As shown in the drawings, the portable water purifier provided by the present application comprises a filter unit 1 and a power device: the filter unit 1 comprises a raw water inlet 11 and a purified water outlet 12; the power device comprises a shell 2 and at least one piston 3 movably arranged in the shell 2, the piston 3 and the shell 2 form two pressure cavities 4, each pressure cavity 4 is correspondingly provided with a raw water inlet 41 and a raw water outlet 42, the raw water outlet 42 is communicated with the raw water inlet 11, the piston 3 reciprocates in the shell 2 to switch each pressure cavity 4 between the negative pressure state and the positive pressure state, and in the process of reciprocating of the piston 3, one of the two pressure cavities 4 is in the negative pressure state, and the other is correspondingly in the positive pressure state. Specifically, the raw water inlets 41 of the two pressure cavities 4 can be connected with external water sources storing raw water, wherein the two raw water inlets 41 can be respectively connected with one external water source, or can be connected with the same external water source.

[0054] The portable water purifier provided in the present application is used for the user to pressurize and operate, and pressurized external raw water is delivered into the filter unit 1, so that the raw water is filtered into purified water in the filter unit 1 and then output. Specifically, the power device forms two pressure cavities 4 by cooperating with the shell 2 through the piston 3. During the reciprocating movement of the piston 3 in the shell 2, one of the two pressure cavities 4 is in a negative pressure state, and the other is in a corresponding positive pressure state. Therefore, for the pressure cavity 4 in the negative pressure state, the raw water inlet 41 of the pressure cavity 4 in the negative pressure state can be selectively controlled to be opened, and the raw water outlet 42 can be selectively controlled to be closed. At this time, the power device can draw water from the external water source connected to the raw water inlet 41 into the pressure cavity 4 for storage. When the pressure cavity 4 changes from the negative pressure state to the positive pressure state, the raw water inlet 41 can be selectively controlled to be closed, and the raw water outlet 42 can be selectively controlled to be opened. Since the raw water outlet 42 is in communication with the raw water inlet 11, the raw water stored in the pressure cavity 4 can enter the filter unit 1 under the action of positive pressure and the pushing action of the piston 3 to realize filtration. Therefore, since the pressure states of the two pressure cavities 4 are always opposite, when one of the pressure cavities 4 in the negative pressure state obtains raw water from the external water source, the other pressure cavity 4 in the positive pressure state can deliver raw water to the filter unit 1. The two pressure cavities 4 alternately deliver raw water to the filter unit 1, so that the filter unit 1 can continuously output water during the reciprocating movement of the piston 3, thereby solving the problem of intermittent water output, helping to increase the water output flow, and increasing the water output per unit time, so that the portable water purifier is more time-saving and labor-saving to operate.

[0055] In a specific embodiment, the power device can include a piston. Specifically, the two sides of the piston are surrounded by the shell to form pressure cavities, so that the pressure cavities are distributed on both sides of the piston, and when the piston moves back and forth, one of the pressure cavities expands to form a negative pressure state, and the other pressure cavity shrinks to form a positive pressure state.

[0056] As a preferred embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the power device includes two pistons 3, each piston 3 surrounds the shell 2 to form a pressure cavity 4, and the two pistons 3 are connected through a linkage structure to drive the two pistons 3 to alternately move back and forth. Two pistons 3 respectively surround the shell 2 to form a pressure cavity 4, and both pistons 3 need to be operated simultaneously and form alternating reciprocating movement to make one of the two pressure cavities 4 in a negative pressure state and the other in a positive pressure state. Therefore, by connecting the two pistons 3 through the linkage structure, the two pistons 3 can be alternately moved back and forth by driving the linkage structure, which helps to simplify the structure and improve the operation convenience.

[0057] Regarding the specific form of the linkage structure, in the preferred embodiment, as shown in Figures 1 to 3 andFigure 5 and Figure 6 As shown, the linkage structure includes a linkage rod 5 and a support base 6. The support base 6 is fixedly installed on the housing 2. The linkage rod 5 has a connecting part 51 and linkage parts 52 located on both sides of the connecting part 51. The connecting part 51 is pivotally connected to the support base 6. The two pistons 3 are connected to the two linkage parts 52 one-to-one. Specifically, the two sides of the support base 6 can be fixed to the housing 2 with screws. The linkage rod 5 is pivotally connected to the support base 6 through the connecting part 51. The two pistons 3 are connected to the two linkage parts 52 one-to-one. Since the two linkage parts 52 are located on both sides of the connecting part 51, when the connecting part 51 rotates relative to the support base 6, the two linkage parts 52 form an alternating reciprocating motion in a rising and falling manner. When one piston 3 is pushed towards the pressure chamber 4, its corresponding pressure chamber 4 becomes a positive pressure state. When the other pressure chamber 4 is pulled out relative to the pressure chamber 4, its corresponding pressure chamber 4 becomes a negative pressure state. The user only needs to operate the linkage rod 5 to rotate to realize the linkage of the two pistons 3, which is convenient to operate and improves the use effect. Preferably, the two pressure chambers 4 can be arranged side by side, the support base 6 is installed between the two pressure chambers 4, and the linkage rod 5 is pivotally connected to the support base 6 through the connecting part 51, and the linkage parts 52 on both sides correspond to the two pressure chambers 4 one by one.

[0058] Regarding the structure of the support base 6, in a preferred embodiment, such as Figure 6 As shown, the support base 6 includes a base plate 61 and two support plates 62 vertically arranged on the base plate 61. The base plate 61 is connected to the housing 2, and the connecting part 51 is sandwiched between the two support plates 62 and pivotally connected to the support plates 62 via a rotating shaft. Specifically, the base plate 61 can be fixedly connected to the housing 2 by screws. The connecting part 51 and the support plates 62 on both sides are provided with rotating holes. The rotating shaft passes through the rotating holes provided in the connecting part 51 and the support plates 62 on both sides to realize the pivotal connection between the connecting part 51 and the support plates 62.

[0059] In a preferred embodiment, such as Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the linkage structure further comprises a connecting rod 7, one end of the connecting rod 7 is pivotally connected with the linkage part 52, and the other end is fixedly connected with the piston 3, so that the linkage rod 5 drives the piston 3 to reciprocate through the connecting rod 7. Those skilled in the art can understand that when the linkage rod 5 rotates around the support base 6, the linkage part 52 moves in a circular motion. If the linkage part 52 is fixedly connected with the connecting rod 7, the linkage part 52 will drive the connecting rod 7 to move in a circular motion, and at the same time, the connecting rod 7 will also drive the piston 3 to move in a circular motion. The reciprocating trajectory of the piston 3 is complex. Therefore, the present application is pivotally connected with the linkage part 52 and the connecting rod 7, so that even if the linkage part 52 moves in a circular motion, the connecting rod 7 can be ensured to move linearly by rotating relative to the linkage part 52, and then the piston 3 is driven to move linearly. Therefore, the reciprocating stroke of the piston 3 relative to the shell 2 is a linear stroke, and the operation is more stable. The pressure chamber 4 can be a simple cylinder or column as a whole, simplifying the structure.

[0060] In a preferred embodiment, as shown in Figures 1 to 3 As shown, the linkage structure further comprises an operation handle 8 connected with the end of the linkage rod 5. By providing the operation handle 8, the user can hold and operate the operation handle 8 to drive the linkage rod 5 to rotate, which prolongs the force arm and makes the operation more labor-saving. Preferably, the operation handle 8 can be pivotally connected with the linkage rod 5, so that even if the end of the linkage rod 5 moves in a circular motion, the operation handle 8 can be ensured to move linearly by rotating relative to the linkage rod 5. Therefore, the user only needs to control the operation handle 8 to move linearly to make the two pistons 3 move reciprocally, and the water outlet process can be reliably completed. Of course, the operation handle 8 can also be fixedly connected with the linkage rod 5, and the operation handle 8 needs to move in a circular motion to drive the linkage rod 5 to rotate relative to the support base 6.

[0061] In other embodiments, the linkage structure can also adopt other suitable structures, for example, the linkage structure can also be a rigid rod rigidly connected between the two pistons 3. The two pistons 3 are symmetrically connected at both ends of the rigid rod. The rigid rod moves linearly to drive the two pistons 3 to move in the same direction, so that one of the two pressure chambers 4 is in a negative pressure state and the other is in a positive pressure state.

[0062] As a preferred embodiment of the present application, as shown in Figure 3 and Figure 11 As shown, the shell 2 is provided with a limiting rib 221 protruding towards the pressure chamber 4. The piston 3 can be stopped by the limiting rib 221 during movement in the direction of making the pressure chamber 4 into a positive pressure state. A plurality of limiting ribs 221 are arranged at intervals along the circumference of the shell 2, and the raw water inlet 41 is opened between two adjacent limiting ribs 221. In order to Figure 3As shown in the state, when the piston 3 is in contact with the limiting ribs 221 during the process of moving downward to make the pressure chamber 4 into a positive pressure state, the piston 3 is stopped by the limiting ribs 221 and cannot continue to move downward. Through the stopping effect of the limiting ribs 221, on the one hand, the movement of the piston 3 is stopped, forming an extreme position of the piston 3, and on the other hand, since the raw water inlet 41 is opened between two adjacent limiting ribs 221, after the piston 3 is stopped by the limiting ribs 221, the pressure chamber 4 still retains a part of space, which ensures that this part of space is in communication with the raw water inlet 41, and then when the piston 3 moves towards the direction of making the pressure chamber 4 into a negative pressure state, the external water source can enter the pressure chamber 4 through the raw water inlet 41. As for the stopping of the piston 3 moving in the direction of making the pressure chamber 4 into a positive pressure state, it can be realized by controlling the length of the linkage part 52 and the length of the connecting rod 7 within a reasonable range, so as to prevent the piston 3 from being taken out of the shell 2.

[0063] As a preferred embodiment of the present application, the raw water inlet 41 and the raw water outlet 42 are respectively provided with a control valve 9, which is configured to open the raw water inlet 41 and close the raw water outlet 42 when the pressure chamber 4 is in a negative pressure state, and is configured to open the raw water outlet 42 and close the raw water inlet 41 when the pressure chamber 4 is in a positive pressure state. When the pressure chamber 4 is in a negative pressure state, the raw water inlet 41 is opened to communicate the external water source with the pressure chamber 4, the raw water outlet 42 is closed to cut off the communication between the filter unit 1 and the pressure chamber 4, and the external raw water can enter the pressure chamber 4. When the pressure chamber 4 is in a positive pressure state, the raw water inlet 41 is closed to cut off the communication between the external water source and the pressure chamber 4, the raw water outlet 42 is opened to communicate the filter unit 1 with the pressure chamber 4, and the raw water in the pressure chamber 4 can enter the filter unit 1 for filtration.

[0064] As to the structure of the control valve 9, in the preferred embodiment, as shown in Figure 9 and Figure 10As shown, the control valve 9 is a check valve including a valve housing 91, a valve core 92 installed in a water flow channel provided in the valve housing 91, and a spring 93 provided between the valve core 92 and the valve housing 91. The valve core 92 is capable of switching between a position closing the water flow channel and a position opening the water flow channel. Specifically, the valve core 92 is forced to open the water flow channel while compressing the spring 93. When the force on the valve core 92 disappears, the spring 93 drives the valve core 92 to return to its original position to close the water flow channel again. When the pressure chamber 4 is in a negative pressure state, the valve core 92 of the control valve 9 installed in the corresponding raw water inlet 41 is moved by the negative pressure to open the water flow channel, allowing external raw water to enter the pressure chamber 4. The valve core 92 of the control valve 9 installed in the corresponding raw water outlet 42 is closed by the negative pressure to close the water flow channel. When the pressure chamber 4 is in a positive pressure state, the valve core 92 of the control valve 9 installed in the corresponding raw water inlet 41 is closed to prevent external raw water from entering the pressure chamber 4. The valve core 92 of the control valve 9 installed in the corresponding raw water outlet 42 is opened to allow raw water in the pressure chamber 4 to enter the filter unit 1.

[0065] As a preferred embodiment of the present application, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 11 and Figure 12 As shown, the filter unit 1 includes a base 13, a filter core 14 installed on the base 13, and a sleeve 15 sleeved on the outside of the filter core 14. The housing 2 includes a connecting seat 21 and a piston cylinder 22 integrally connected with the connecting seat 21. The piston 3 is arranged in the piston cylinder 22. The upper and lower ends of the sleeve 15 are open. The lower end of the sleeve 15 is threadedly connected with the base 13. The connecting seat 21 is threadedly connected with the upper end of the sleeve 15. Specifically, for the embodiment in which the aforementioned power device includes two pistons 3, the housing 2 can be arranged with two piston cylinders 22 side by side. The two pistons 3 are correspondingly matched with the two piston cylinders 22 to form two pressure chambers 4. The lower end of the piston cylinder 22 is provided with a raw water outlet 42. The raw water outlet 42 can be directly communicated with the open upper end of the sleeve 15. The open upper end of the sleeve 15 constitutes a raw water inlet 11 of the filter unit 1. The connecting seat 21 is threadedly connected with the upper end of the sleeve 15, which facilitates disassembly and assembly. Moreover, the connecting seat 21 can be detached to replace the filter core 14 from the upper end of the sleeve 15.

[0066] The unmentioned parts in the present application can be implemented by using or referring to the existing technology.

[0067] Each embodiment in the present specification is described in a progressive manner. The same or similar parts between each embodiment can be understood by mutual reference. Each embodiment mainly describes the differences from other embodiments.

[0068] The above merely provides an example of the present application, but is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A portable water purifier, characterized by comprising: The utility model relates to a portable water purifier, comprising: a filtering unit comprising a raw water inlet and a purified water outlet; a power device comprising a housing and at least one piston movably arranged in the housing, the piston and the housing enclosing two pressure chambers, each of the pressure chambers being provided with a raw water inlet and a raw water outlet, the raw water outlet being communicated with the raw water inlet, the piston moving back and forth in the housing to switch each of the pressure chambers between a negative pressure state and a positive pressure state, and during the back and forth movement of the piston, one of the two pressure chambers is in the negative pressure state and the other is in the corresponding positive pressure state.

2. The portable water purifier according to claim 1, wherein the power device comprises two pistons, each of the pistons enclosing one of the pressure chambers, and the two pistons are connected through a linkage structure to drive the two pistons to move back and forth alternately.

3. The portable water purifier according to claim 2, wherein the linkage structure comprises a linkage rod and a support seat, the support seat is fixedly installed on the housing, the linkage rod has a connecting part and linkage parts on both sides of the connecting part, the connecting part is pivotally connected with the support seat, and the two pistons are connected with the two linkage parts one by one.

4. The portable water purifier according to claim 3, wherein the support seat comprises a bottom plate and two support plates vertically arranged on the bottom plate, the bottom plate is connected with the housing, and the connecting part is clamped between the two support plates and is pivotally connected with the support plates through a rotating shaft.

5. The portable water purifier according to claim 3, wherein the linkage structure further comprises a connecting rod, one end of the connecting rod is pivotally connected with the linkage part, and the other end is fixedly connected with the piston, so that the linkage rod drives the piston to move back and forth through the connecting rod.

6. The portable water purifier according to claim 3, wherein the linkage structure further comprises an operating handle, and the operating handle is connected with the end of the linkage rod.

7. The portable water purifier according to claim 1, wherein the housing is provided with limiting ribs protruding into the pressure chamber, the piston can be stopped by the limiting ribs during the movement in the direction of making the pressure chamber into the positive pressure state, a plurality of limiting ribs are arranged at intervals along the circumference of the housing, and the raw water inlet is arranged between two adjacent limiting ribs.

8. The portable water purifier according to claim 1, wherein control valves are arranged in the raw water inlet and the raw water outlet respectively, the control valves are configured to open the raw water inlet and close the raw water outlet when the pressure chamber is in the negative pressure state, and are configured to open the raw water outlet and close the raw water inlet when the pressure chamber is in the positive pressure state.

9. The portable water purifier according to claim 8, wherein The control valve is a check valve comprising a valve housing, a valve core and a spring, the valve core is installed in a water flow channel of the valve housing, the spring is arranged between the valve core and the valve housing, and the valve core can switch between a position of closing the water flow channel and a position of opening the water flow channel under force. 10.The portable water purifier according to claim 1, characterized in that, The filter unit comprises a base, a filter element installed on the base, and a sleeve shell sleeved outside the filter element, the shell comprises a connecting seat and a piston cylinder integrally connected with the connecting seat, the piston is arranged in the piston cylinder, the upper and lower ends of the sleeve shell are arranged in an open manner, the lower end of the sleeve shell is threadedly connected with the base, and the connecting seat is threadedly connected with the upper end of the sleeve shell.

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