Pressure valve for a tooth irrigator and tooth irrigator with two water tanks

Abstract

Pressure valve for a dental irrigator, characterized in that it comprises the following: a valve body (140), wherein the valve body (140) comprises a main section (141) and a first inlet section (120), a second inlet section (130) and an outlet section (110) extending from the main section (141), wherein the outlet section (110) is located between the first inlet section (120) and the second inlet section (130) in an axial direction of the main section (141); a valve core (150), wherein the valve core (150) is movably provided in the valve body (140), and wherein a spring is provided between the valve body (140) and the valve core (150), wherein the valve core (150) can change its position in the valve body (140) by pressing in order to achieve a blocking of the first inlet section (120) or the second inlet section (130), wherein the spring comprises a first spring (161) and a second spring (162).

Description

Technical area

[0001] The present application relates to the technical field of dental irrigators, in particular to a pressure valve for a dental irrigator and a dental irrigator with two water tanks. State of the art

[0002] Mouthwashes are oral cleaning devices that use a pulsating water stream to clean the teeth and interdental spaces. Mouthwashes have the primary function of cleaning the mouth, masking bad breath caused by bacteria or yeast that break down food debris, and leaving a pleasant, refreshing feeling in the mouth. The two functions complement each other, and users often rinse their mouths with mouthwash after rinsing their teeth with a mouthwash. However, both the mouthwash and the mouthwash (usually bottled) take up a lot of space, and portability while traveling could be improved.

[0003] The patent, granted under Chinese Patent Application No. CN213130038U, discloses a dual-tank dental irrigator, in which two water tanks and two water pipes are designed to contain different liquids to meet user needs. However, the structure of the dental irrigator is complicated, the water pipe occupies a large space, and the switching element for controlling the liquid flow is prone to wear on the water pipe of the dental irrigator, so there is still room for improvement in stability and durability. Contents of this utility model

[0004] To solve or mitigate at least one of the problems described in the prior art, the present application provides a pressure valve for a dental irrigator and a dental irrigator with two water tanks.

[0005] The pressure valve for a dental irrigator of the present utility model comprises: a valve body, the valve body comprising a main portion and a first inlet portion, a second inlet portion, and an outlet portion extending from the main portion, the outlet portion being located between the first inlet portion and the second inlet portion in an axial direction of the main portion; a valve core, wherein the valve core is movably provided in the valve body, and wherein a spring is provided between the valve body and the valve core, wherein the valve core can change its position in the valve body by pressing to achieve blocking of the first inlet portion or the second inlet portion, wherein the spring comprises a first spring and a second spring.

[0006] In at least one embodiment, the inner cavity body of the main portion comprises a main cavity and a first cavity and a second cavity, which are respectively provided on the axial sides of the main cavity, wherein the main cavity is connected to the outlet portion, wherein the first cavity is connected to the first inlet portion, wherein the second cavity is connected to the second inlet portion, wherein the diameter of the first cavity and the second cavity is each smaller than the diameter of the main cavity, wherein a first axial end surface is formed between the main cavity and the first cavity, wherein a second axial end surface is formed between the main cavity and the second cavity, wherein the valve core comprises a first sealing portion and a second sealing portion, wherein the first sealing portion can cover the first axial end surface and block the first cavity,while the second sealing portion can cover the second axial end surface and block the second cavity.,

[0007] In at least one embodiment, the valve core comprises: a first push rod, wherein the first sealing portion protrudes radially from the first push rod; a second push rod, the second push rod being connected to the first push rod, and the second sealing portion projecting radially from the second push rod.

[0008] In at least one embodiment, the first push rod is slidably provided in the second push rod, wherein the first spring is provided between the axial direction of the first push rod and the second push rod, wherein an end portion of one end of the second push rod is provided with a second push rod engagement portion, wherein the second push rod engagement portion extends radially inward toward the second push rod, wherein an end portion of one end of the first push rod is provided with a first push rod engagement portion, wherein the first push rod engagement portion extends radially outward toward the first push rod, such that the first spring is compressed when the first push rod and the second push rod are moved in opposite directions, wherein, after the first push rod and the second push rod are moved backward by pressing the first spring,the engaging portion of the first push rod abuts the engaging portion of the second push rod and prevents the first push rod from detaching from the second push rod.

[0009] In at least one embodiment, the second spring is provided between the second push rod and the first axial end surface, wherein the pressure valve further comprises a rail portion, a rotary portion, and a push rod portion, wherein the rotary portion and the push rod portion are inserted into the rail portion, wherein the push rod portion extends from the rail portion, wherein the rotary portion presses against the second push rod, and wherein the pressure valve is switched between a pressure-locked state and a pressure-opened state by pressing the push rod portion, wherein the first sealing portion blocks the first inlet portion in the pressure-locked state, and wherein the outlet portion is in communication with the second inlet portion,while the second sealing portion in the pressure-open state blocks the second inlet portion and wherein the outlet portion is in communication with the first inlet portion.,

[0010] In at least one embodiment, the first inlet portion and the second inlet portion are arranged at the bottom of the valve body.

[0011] The dental irrigator with two water tanks of the present utility model comprises: a pressure valve for a dental irrigator; a first water tank, wherein the first inlet portion is connected to the first water tank; a second water tank, wherein the second inlet portion is connected to the second water tank; a water drainage pipe, one end of the water drainage pipe being connected to the outlet portion; a pump assembly, the pump assembly being connected to the other end of the water discharge pipe and to the spray outlet of the dental irrigator; a nozzle, the nozzle being connected to the spray outlet.

[0012] In at least one embodiment, the pump assembly comprises a pressure chamber, one end of the pressure chamber being connected to the water discharge pipe and introducing liquid from the pressure valve into the pressure chamber, a first shut-off valve being provided between the water discharge pipe and the pressure chamber, the other end of the pressure chamber being connected to the spray outlet and causing the liquid in the pressure chamber to be sprayed from the dental irrigator through the spray outlet, a second shut-off valve being provided between the pressure chamber and the spray outlet.

[0013] A first shut-off valve is provided between the water discharge pipe and the pressure chamber and a second shut-off valve is provided between the pressure chamber and the spray outlet.

[0014] In at least one embodiment, the pump assembly comprises: a gear shaft; an eccentric bushing, the eccentric bushing being firmly connected to the transmission shaft; a transmission rod, one end of the transmission rod being connected to the eccentric bushing, while the other end of the transmission rod being connected to a diaphragm, the diaphragm being formed as one side of the pressure chamber.

[0015] In at least one embodiment, the first water tank and the second water tank are each provided with a refill opening.

[0016] The pressure valve of the embodiment of the present application enables stable selection of the liquid flow in the valve and does not wear the water discharge pipe in the dental irrigator and has a stable and durable structure with a long service life.

[0017] The embodiment of the present application provides a first water tank for storing rinsing water and a second water tank for storing mouthwash. The user can use the pressure valve to select liquids, such as rinsing the mouth with mouthwash after rinsing, which is highly portable. In the present application, only one water drainage pipe is used instead of two pipes (water drainage pipes) as in the prior art, resulting in a relatively simple structure and more reasonable space layout. Description of the drawings Fig. 1 shows a front view of a dental irrigator with two water tanks according to an embodiment of the present application. Fig. 2 shows a cross-sectional view of a dental irrigator with two water tanks according to an embodiment of the present application. Fig. 3 shows a schematic representation of the structure of a pump assembly of a dental irrigator with two water tanks according to an embodiment of the present application. Fig. 4 shows an axonometric representation of a pressure valve for a dental irrigator according to an embodiment of the present application. Fig. 5 shows a cross-sectional view of a first inlet portion and a second inlet portion of a pressure valve for a dental irrigator according to an embodiment of the present application. Fig. 6 shows a cross-sectional view of an outlet portion of a pressure valve for a dental irrigator according to an embodiment of the present application. Fig. 7 is a schematic diagram showing the structure of a rail portion, a rotary portion, and a push rod portion of a pressure valve for a dental irrigator according to an embodiment of the present application. Fig. 8 shows a cross-sectional view of a dental irrigator with two water tanks according to an embodiment of the present application, which is provided with a pressure valve. Reference list:

[0018] 100 pressure valve; 110 outlet section; 120 first inlet section; 130 second inlet section; 140 valve body; 141 main section; 1411 main cavity; 1412 first cavity; 1413 second cavity; 1414 first axial end face; 1415 second axial end face; 150 valve core; 151 first sealing section; 152 second sealing section; 153 first push rod; 1531 engaging section of the first push rod; 154 second push rod; 1541 engaging section of the second push rod; 161 first spring; 162 second spring; 170 rail section; 171 first guide rail; 172 second guide rail; 173 transition ramp of the guide rail; 180 rotating section; 181 insertion section; 182 transition ramp of the insertion section; 190 push rod section; 210 first water tank; 211 first refill opening; 220 second water tank; 221 second refill opening; 300 water drainage pipe; 400 Pump assembly; 410 Pressure chamber; 411 First shut-off valve; 412 Second shut-off valve; 420 Gear shaft; 421 Gear; 430 Eccentric bushing; 440 Transmission rod; 450 Diaphragm; 460 Transmission gear; 500 Spray outlet; 510 Nozzle; 610 Battery; 620 Motor. Detailed embodiment

[0019] Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It is understood that these specific descriptions are intended only to illustrate how a person skilled in the art might practice the present application. They do not claim to be exhaustive of all practical ways in which the application may be practiced, nor are they intended to limit the scope of the present application.

[0020] Embodiments of the present application provide a pressure valve for a dental irrigator (hereinafter sometimes referred to as a "pressure valve") and a dental irrigator having two water tanks that can be used with dental irrigators.

[0021] As in the Fig. 4, Fig. 5 and Fig. 6, the pressure valve 100 may comprise a valve body 140 and a valve core 150. The valve body 140 comprises a main portion 141 and a first inlet portion 120, a second inlet portion 130, and an outlet portion 110 extending from the main portion 141, wherein the outlet portion 110 is located between the first inlet portion 120 and the second inlet portion 130 in an axial direction of the main portion 141. The valve core 150 is movably provided in the valve body 140, and a spring is provided between the valve body 140 and the valve core 150. The valve core 150 can change its position in the valve body 140 by pressing to achieve blocking of the first inlet portion 120 or the second inlet portion 130. The spring comprises a first spring 161 and a second spring 162 includes.

[0022] It is understood that in the present application, the pressure valve 100 is used in a dental irrigator in which the switching of the liquid is easy, the water discharge pipe 300 of the dental irrigator with two water tanks (see Fig. 3, which will be described later) is not worn out and is structurally stable and durable.

[0023] In one embodiment of the present application, as described in the Fig. 5 and Fig. 6, the inner cavity body of the main portion 141 may include a main cavity 1411 and a first cavity 1412 and a second cavity 1413, which are respectively provided on the axial sides of the main cavity 1411. The main cavity 1411 is connected to the outlet section 110, the first cavity 1412 is connected to the first inlet section 120, the second cavity 1413 is connected to the second inlet section 130, wherein the diameter of the first cavity 1412 and the second cavity 1413 is each smaller than the diameter of the main cavity 1411, a first axial end surface 1414 is formed between the main cavity 1411 and the first cavity 1412, a second axial end surface 1415 is formed between the main cavity 1411 and the second cavity 1413.

[0024] The valve core 150 may include a first sealing portion 151 and a second sealing portion 152, wherein the first sealing portion 151 may cover the first axial end surface 1414 and block the first cavity 1412, while the second sealing portion 152 may cover the second axial end surface 1415 and block the second cavity 1413 to enable control of fluid flow in the valve body 140 by moving the valve core 150 to block the corresponding first cavity 1412 or second cavity 1413.

[0025] In one embodiment of the present application, as in Fig. 5, the valve core 150 includes a first push rod 153 and a second push rod 154. The first seal portion 151 protrudes radially from the first push rod 153, and the second push rod 154 is connected to the first push rod 153, and the second seal portion 152 protrudes radially from the second push rod 154. For example, the first seal portion 151 may be a cylindrical structure provided at one end of the first push rod 153, and the second seal portion 152 may be a flange structure provided at one end of the second push rod 154.

[0026] In one embodiment of the present application, as in Fig. 5, the first push rod 153 is slidably arranged in the second push rod 154, e.g., the second push rod 154 is provided with a shaft cavity, and the first push rod 153 is guided from one end (e.g., the right end of Fig. 5) is slidably inserted into the shaft cavity of the second push rod 154.

[0027] A first spring 161 may be provided between the axial direction of the first push rod 153 and the second push rod 154, a locking portion 1541 of the second 1541 is provided at an end portion of one end (e.g., the left end of Fig. 5) of the second push rod 154, the second push rod engaging portion 1541 extends radially inward toward the second push rod 154, and a first push rod engaging portion 1531 is provided at an end portion of the end of the first push rod 153 (e.g., the right end of Fig. 5) is provided; The first push rod locking portion 1531 extends radially outward from the first push rod 153 so that the first spring 161 is compressed when the first push rod 153 and the second push rod 154 move in opposite directions; After the first push rod 153 and the second push rod 154 are pushed by the first spring 161 and move backward, the first push rod locking portion 1531 is pressed against the second push rod locking portion 1541 to prevent the first push rod 153 from disengaging from the second push rod 154.

[0028] In one embodiment of the present application, as in Fig. As shown in Figure 5, a second spring 162 is provided between the second push rod 154 and the first axial end surface 1414. The second spring 162 can, for example, bear against the first axial end surface 1414 and the second sealing portion 152.

[0029] The present application may include a pressure-opened switching mechanism connected to the valve core 150, which enables manual control of the pressure valve. The pressure-opened switching mechanism may, for example, resemble a pressure-opened structure of a pressure-driven ballpoint pen, capable of implementing a pressure-locked and a pressure-opened state, corresponding respectively to the two states of blocking the first inlet portion 120 and blocking the second inlet portion 130 of the pressure valve 100. The present application applies the pressure-opened switching mechanism to the valve structure of the dental irrigator, which facilitates manual switching of the flow state of the liquid in the valve and is easy to operate. As shown in Fig. 7, the pressure-opened switching mechanism may include a rail portion 170, a rotary portion 180, and a push rod portion 190.

[0030] The rail portion 170 is fixedly connected to the valve body 140, and an inner wall surface of the rail portion 170 is provided with a plurality of first guide rails 171 and a plurality of second guide rails 172 arranged alternately around the axis. The first guide rails 171 are longer than the second guide rails 172, and a transition ramp of the guide rail 173 is provided between the first guide rails 171 and the second guide rails 172. The extension directions of both the first guide rails 171 and the second guide rails 172 can be parallel to the axis.

[0031] The rotating portion 180 is located on the inner side of the rail portion 170, and a plurality of insertion portions 181 arranged around the axis are located on the outer wall surface of the rotating portion 180. When the rotating portion 180 rotates, the plurality of insertion portions 181 can switch between inserting a plurality of the first guide rails 171 and inserting a plurality of the second guide rails 172. An end portion of one end of the insertion portions 181 can have a transition ramp of the insertion portion 182, and the other end of the rotating portion 180 can abut the second push rod 154.

[0032] The insertion depth of the insertion portion 181 is changed by the depth of the first guide rail 171 and the second guide rail 172, which in turn affects the axial position of the second push rod 154.

[0033] The push rod portion 190 can be provided in the rail portion 170 in a sliding and rotationally fixed manner. The insertion portion 181 can be pushed away from the first guide rail 171 or the second guide rail 172 by pushing the push rod portion 190. After the insertion portion 181 leaves the guide rail, the rotationally fixed push rod portion 190 abuts the transition slope 182 of the insertion portion, and its transverse force rotates the insertion portion 181 by a certain angle. After the pressure is released, the insertion portion 181 springs back under the action of the first spring and the second spring and is inserted into the first guide rail 171 or the second guide rail 172, thereby realizing a state change.For example, after the insertion portion 181 is rotated and switched from the first guide rail 171 to the second guide rail 172 and stabilized, it is in a pressure-locked state, the first inlet portion 120 is blocked, and the outlet portion 110 is connected to the second inlet portion 130; after the push rod portion 190 is pressed and released again, the insertion portion 181 rotates and switches from the second guide rail 172 to the first guide rail 171, which is in a pressure-opened state at this moment, the second inlet portion 130 is blocked, and the outlet portion 110 is connected to the first inlet portion 120.

[0034] It is understandable that the left rail section 170 in Fig. 7 should be mounted outside the right rotary section 180 and the pusher section 190.

[0035] The operating state of the pressure valve 100 can be adjusted by manually pressing the push rod section 190, or the push rod section 190 can be moved by a drive structure such as a motor to automatically adjust the operating state. The control of the drive structure, such as the motor, can be connected to an application of the mobile terminal to achieve automatic switching of the tooth rinsing and mouth rinsing processes. For example, the outlet section 110 can be set to be connected to the first inlet section 120 for the first two minutes to rinse the teeth with water. After the two-minute tooth rinsing time has elapsed, the motor drives the push rod section 190, and the outlet section 110 is connected to the second inlet section 130 to rinse the mouth with mouthwash.Of course, the automatic switching on or off, the specific switching time can be set according to the user's needs.

[0036] In one embodiment of the present application, as in Fig. 5, the first inlet portion 120 and the second inlet portion 130 are located at the bottom of the valve body 140. The structure that both the first inlet portion 120 and the second inlet portion 130 are located at the bottom facilitates the installation of the pressure valve 100, for example, by vertically inserting it into the corresponding interface of the water tank, which is simple in structure and easy to install.

[0037] As in the Fig. 1 to 3, the dual water tank dental irrigator may include a first water tank 210, a second water tank 220, a water drainage pipe 300, a pump assembly 400, and the above pressure valve 100, wherein the first inlet portion 120 is connected to the first water tank 210, the second inlet portion 130 is connected to the second water tank 220, and the outlet portion 110 is connected to one end of the water drainage pipe 300.

[0038] As in Fig. 3, the pump assembly 400 may include a pressure chamber 410, wherein one end of the pressure chamber 410 (e.g., the upper right end of the pressure chamber 410 in the view of Fig. 3) is connected to the water discharge pipe 300 and introduces liquid from the pressure valve 100 into the pressure chamber 410. The other end of the pressure chamber 410 (e.g., the upper left end of the pressure chamber 410 in the view of Fig. 3) is connected to the spray outlet 500 and causes the liquid in the pressure chamber 410 to be sprayed out of the dental irrigator through the spray outlet 500. A nozzle 510 can also be mounted outside the spray outlet 500 (see Fig. 1, Fig. 2 and Fig. 8). As the dashed arrows in Fig. 3, the liquid from the first water tank 210 or the second water tank 220 can be sprayed out from the spray outlet 500 after passing through the water discharge pipe 300, the pressure chamber 410.

[0039] Optionally, the first water tank 210 can hold the rinsing water, and the second water tank 220 can hold the mouthwash. The volume of the first water tank 210 can be larger than the volume of the second water tank 220. The user can use the mouthwash with the dental irrigator for rinsing after rinsing without having to carry two separate hygiene products, which is more portable. The present application uses only one water discharge pipe 300 instead of two water pipes (water discharge pipe 300) as in the prior art, which is relatively simple in structure and more reasonable in space layout. By switching the pressure valve 100, the water discharge pipe 300 is not worn, making the dental flosser robust and durable.

[0040] In one embodiment of the present application, see Fig. 3, a first shut-off valve 411 is provided between the water discharge pipe 300 and the pressure chamber 410, and a second shut-off valve 412 is provided between the pressure chamber 410 and the sniffer outlet 500. The second shut-off valve 412 may be a duckbill valve.

[0041] In one embodiment of the present application, see Fig. 2, the dual-tank dental irrigator may include a battery 610 and a motor 620. The battery 610 is connected to the motor 620, and the output shaft of the motor 620 is connected to the pump assembly 400 for pumping the liquid.

[0042] In one embodiment of the present application, see Fig. 3, the pump assembly 400 may include a gear shaft 420, an eccentric bushing 430, and a transmission rod 440. The eccentric bushing 430 is fixedly connected to the gear shaft 420, one end of the transmission rod 440 is connected to the eccentric bushing 430, and the other end of the transmission rod 440 is connected to a diaphragm 450 formed as one side of the pressure chamber 410. The operating principle may be as follows: The gear shaft 420 is driven by the motor 620 to rotate the eccentric bushing 430, and the transmission rod 440 forms a cam mechanism with the eccentric bushing 430 to reciprocate the transmission rod 440. When the transmission rod 440 moves upward, the liquid in the pressure chamber 410 is pumped out of the spray outlet 500.When the transmission rod 440 moves downward, the transmission rod 440 pumps the liquid in the first water tank 210 or the second water tank 220 into the pressure chamber 410.

[0043] Furthermore, the pump assembly 400 may include a transmission gear 460 to which an output shaft of the motor 620 is connected. The transmission gear 460 meshes with a gear 421 of the transmission shaft 420 to rotate the transmission shaft 420. The transmission gear 460 and the gear 421 of the transmission shaft 420 may be bevel gears with intersecting axes.

[0044] In one embodiment of the present application, as in Fig. 1, Fig. 2 and Fig. 8, a first refilling port 211 is provided on the side of the first water tank 210 and a second refilling port 221 is provided on the side of the second water tank 220, and the corresponding liquids can be refilled for each water tank through each refilling port, respectively.

[0045] In one embodiment of the present application, as in Fig. 2 and Fig. As shown in Figure 8, the first water tank 210 is disposed at a lower side of the second water tank 220. The first inlet portion 120 and the first water tank 210 may also be connected by a hose, and one end of the hose may extend to the bottom of the first water tank 210 to facilitate the irrigator pumping the liquid into the first water tank 210. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 213130038U

[0003]

Claims

[1] Pressure valve for a dental irrigator, characterized by that it includes: a valve body (140), the valve body (140) comprising a main portion (141) and a first inlet portion (120), a second inlet portion (130) and an outlet portion (110) extending from the main portion (141), the outlet portion (110) being located between the first inlet portion (120) and the second inlet portion (130) in an axial direction of the main portion (141); a valve core (150), wherein the valve core (150) is provided movably in the valve body (140), and wherein a spring is provided between the valve body (140) and the valve core (150), wherein the valve core (150) can change its position in the valve body (140) by pressing in order to achieve a blocking of the first inlet section (120) or the second inlet section (130), wherein the spring comprises a first spring (161) and a second spring (162). [2] Pressure valve for a dental irrigator according to claim 1, characterized bythat the inner cavity body of the main section (141) comprises a main cavity (1411) and a first cavity (1412) and a second cavity (1413), which are respectively provided on the axial sides of the main cavity (1411), wherein the main cavity (1411) is connected to the outlet section (110), wherein the first cavity (1412) is connected to the first inlet section (120), wherein the second cavity (1413) is connected to the second inlet section (130), wherein the diameter of the first cavity (1412) and the second cavity (1413) is each smaller than the diameter of the main cavity (1411), wherein a first axial end surface (1414) is formed between the main cavity (1411) and the first cavity (1412), wherein a second axial end surface (1415) is formed between the main cavity (1411) and the second cavity (1413),wherein the valve core (150) comprises a first sealing portion (151) and a second sealing portion (152), wherein the first sealing portion (151) can cover the first axial end surface (1414) and block the first cavity (1412), while the second sealing portion (152) can cover the second axial end surface (1415) and block the second cavity (1413). [3] Pressure valve for a dental irrigator according to claim 2, characterized by that the valve core (150) comprises: a first push rod (153), wherein the first sealing portion (151) protrudes radially from the first push rod (153); a second push rod (154), wherein the second push rod (154) is connected to the first push rod (153), and wherein the second sealing portion (152) protrudes radially from the second push rod (154). [4] Pressure valve for a dental irrigator according to claim 3, characterized bythat the first push rod (153) is provided slidingly in the second push rod (154), wherein the first spring (161) is provided between the axial direction of the first push rod (153) and the second push rod (154), wherein an end portion of one end of the second push rod (154) is provided with a second push rod engagement portion (1541), wherein the second push rod engagement portion (1541) extends radially inward toward the second push rod (154), wherein an end portion of one end of the first push rod (153) is provided with a first push rod engagement portion (1531), wherein the first push rod engagement portion (1531) extends radially outward toward the first push rod, so that the first spring (161) is compressed when the first push rod (153) and the second push rod (154) are moved in opposite directions, wherein,after the first push rod (153) and the second push rod (154) are moved backward by pressing the first spring (161), the locking portion (1531) of the first push rod (1531) abuts the locking portion (1541) of the second push rod and prevents the first push rod (153) from detaching from the second push rod (154). [5] Pressure valve for a dental irrigator according to claim 4, characterized bythat the second spring (162) is provided between the second push rod (154) and the first axial end surface (1414), wherein the pressure valve (100) further comprises a rail portion (170), a rotary portion (180) and a push rod portion (190), wherein the rotary portion (180) and the push rod portion (190) are inserted into the rail portion (170), wherein the push rod portion (190) extends from the rail portion (170), wherein the rotary portion (180) presses against the second push rod (154), and wherein the pressure valve (100) is switched between a pressure-locked state and a pressure-opened state by pressing the push rod portion (190), wherein the first sealing portion (151) blocks the first inlet portion (120) in the pressure-locked state, and wherein the outlet portion (110) is in communication with the second inlet portion (130) stands,while the second sealing section (152) in the pressure-open state blocks the second inlet section (130) and wherein the outlet section (110) is in communication with the first inlet section (120). [6] Pressure valve for a dental irrigator according to claim 1, characterized by that the first inlet section (120) and the second inlet section (130) are arranged at the bottom of the valve body (140). [7] Dental irrigator with two water tanks, characterized by that it includes: a pressure valve for a dental irrigator according to one of claims 1 to 6; a first water tank (210), wherein the first inlet portion (120) is connected to the first water tank (210); a second water tank (220), wherein the second inlet portion (130) is connected to the second water tank (220); a water drainage pipe (300), wherein one end of the water drainage pipe (300) is connected to the outlet portion (110); a pump assembly (400), the pump assembly (400) being connected to the other end of the water discharge pipe (300) and to the spray outlet (500) of the dental irrigator; a nozzle (510), wherein the nozzle (510) is connected to the spray outlet (500). [8] Dental irrigator with two water tanks according to claim 7, characterized byin that the pump arrangement (400) comprises a pressure chamber (410), one end of the pressure chamber (410) being connected to the water discharge pipe (300) and introducing liquid from the pressure valve (100) into the pressure chamber (410), a first shut-off valve (411) being provided between the water discharge pipe (300) and the pressure chamber (410), the other end of the pressure chamber (410) being connected to the spray outlet (500) and causing the liquid in the pressure chamber (410) to be sprayed from the dental irrigator through the spray outlet (500), a second shut-off valve (412) being provided between the pressure chamber (410) and the spray outlet (500). [9] Dental irrigator with two water tanks according to claim 8, characterized by that the pump arrangement (400) comprises: a transmission shaft (420); an eccentric bushing (430), wherein the eccentric bushing (430) is fixedly connected to the gear shaft (420); a transmission rod (440), one end of the transmission rod (440) being connected to the eccentric bushing (430), while the other end of the transmission rod (440) is connected to a diaphragm (450), the diaphragm (450) being formed as one side of the pressure chamber (410). [10] Dental irrigator with two water tanks according to claim 7, characterized by that the first water tank (210) and the second water tank (220) are each provided with a refill opening.

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