Water supply device and coffee machine

Abstract

The present invention discloses a water supply device and a coffee machine with a water supply device, wherein the water supply device includes a water tank, a one-way valve and an exhaust rod, the water tank is used to store water, the top wall of the water tank is provided with a water inlet and an exhaust hole, the water inlet is provided with a water inlet hole, and the bottom of the water tank is provided with a water outlet; the one-way valve is installed in the water inlet, and includes a limiting part, a sliding rod part and a closing part connected in sequence, the limiting part is used to abut against the outer wall of the water tank for limiting position, and the closing part is used to abut against the inner wall of the water tank for closing the water inlet hole; the exhaust rod is installed in the exhaust hole, and includes a rod cap, a guide part and a sealing part connected in sequence along the axial direction of the exhaust rod, the rod cap is used to abut against the outer wall of the water tank for limiting position, the guide part slides in cooperation with the exhaust hole, the exhaust rod also has an exhaust groove connected to the outside of the water tank, the rod cap and the guide part, the exhaust groove is used for exhausting, and the sealing part is used to seal the exhaust hole. A water supply device of the present invention can conveniently and quickly add water to the water tank.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machine structures, and in particular to a water supply device and a coffee machine. Background Art

[0002] A coffee machine is a coffee brewing machine, and a capsule coffee machine is a type of coffee machine. Its main function is to extract capsule coffee.

[0003] Among them, the water supply device is the structure in the coffee machine that injects water into the coffee capsule.

[0004] However, the existing water supply device requires opening the tank cover to add water to the water tank, which is troublesome to operate. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a water supply device that can quickly and easily add water to a water tank.

[0006] The present invention also provides a coffee machine having the above-mentioned water supply device.

[0007] According to a first aspect of the present invention, a water supply device comprises: a water tank for storing water, the top wall of the water tank having a water inlet and an exhaust hole, the water inlet having a water inlet hole, and the bottom of the water tank having a water outlet; a one-way valve installed in the water inlet, comprising a limiting part, a sliding rod part and a closing part connected in sequence, the limiting part being used to abut and limit with the outer wall of the water tank, the sliding rod part being slidably connected to the water inlet part, and the closing part being used to abut and close the water inlet hole with the inner wall of the water tank; an exhaust rod being installed on the exhaust hole, comprising a rod cap, a guide part and a sealing part being connected in sequence along the axial direction of the exhaust rod, the rod cap being used to abut and limit with the outer wall of the water tank, the guide part slidingly cooperating with the exhaust hole, the exhaust rod also having an exhaust groove communicating with the outside of the water tank, the rod cap and the guide part, the exhaust groove being used for exhausting, and the sealing part being used to seal the exhaust hole.

[0008] A water supply device according to an embodiment of the present invention has at least the following beneficial effects:

[0009] 1. By arranging a water inlet on the top wall of the water tank and a water inlet hole on the water inlet, it is convenient to add water to the water tank from the water inlet. In addition, by arranging an exhaust hole on the top wall of the water tank, it is convenient to discharge the air in the water tank from the exhaust hole, balance the pressure inside and outside the water tank, and avoid the air in the water tank from not being able to be discharged and affecting the addition of water to the water tank.

[0010] It can be understood that when water or water vapor in the water tank lifts the one-way valve, the closing part can abut against the inner wall of the water tank, thereby, the closing part closes the water inlet, thereby preventing water or water vapor in the water tank from overflowing out of the water tank from the exhaust hole.

[0011] When the water tank is heated, the water vapor generated by the evaporation of water in the water tank will lift the exhaust rod, so that the sealing part seals the exhaust hole, thereby facilitating the pressurization of the water tank and increasing the water pressure of the water supply device.

[0012] According to some embodiments of the present invention, a rubber ring is further provided in the water tank, and the rubber ring is mounted on the exhaust rod. The outer surface of the rubber ring is used to abut and seal with the inner wall of the water tank, and the inner surface of the rubber ring is used to seal tightly with the sealing part. The rubber ring and the sealing part cooperate to seal the exhaust hole.

[0013] The benefit is that: by arranging a rubber ring in the water tank, the rubber ring is sleeved on the exhaust rod, the outer surface of the rubber ring is used to abut and seal with the inner wall of the water tank, and the inner surface of the rubber ring is used to tightly seal with the sealing part. It can be understood that when the water tank is filling with water, the guide part cooperates with the exhaust hole to make the inside and outside of the water tank connected, thereby facilitating the discharge of air in the water tank. When the water tank needs to be heated and pressurized after the water tank is filled, the water vapor generated by the heated water in the water tank can push the exhaust rod out of the water tank, thereby making the outer surface of the rubber ring abut and seal with the inner wall of the water tank, and the inner surface of the rubber ring tightly seals with the sealing part, thereby facilitating the increase of the air pressure in the water tank.

[0014] According to some embodiments of the present invention, the rubber ring is slidingly connected to the exhaust rod, and a spring and a support member are further provided in the water tank. The support member is provided at one end of the exhaust rod away from the rod cap, and the two ends of the spring are respectively in contact with the rubber ring and the support member. The spring is used to drive the exhaust rod to move toward the inside of the water tank.

[0015] What is beneficial is that: by slidingly connecting the rubber ring and the exhaust rod, a spring and a support member are arranged in the water tank, and the support member is arranged at the end of the exhaust rod away from the rod cap, the two ends of the spring are respectively in contact with the rubber ring and the support member, and the spring is used to drive the exhaust rod to move toward the inside of the water tank. Therefore, when the water vapor in the water tank pushes the exhaust rod to move outside the water tank to release pressure, the spring can drive the exhaust rod to move toward the inside of the water tank to reset, and then restore the pressure maintaining state of the exhaust rod, so that the water tank can supply water normally.

[0016] According to some embodiments of the present invention, there is a step between the guide portion and the sealing portion, and a sink for accommodating the step is provided at one end of the rubber ring close to the guide portion, and the sink cooperates with the step to limit position.

[0017] The benefit is that: by setting a step between the guide part and the sealing part, a sink for accommodating the step is set at one end of the rubber ring close to the guide part, and the sink and the step cooperate to limit the position, so that the rubber ring and the exhaust rod are more closely matched, and the sealing effect between the rubber ring and the sealing part is better.

[0018] According to some embodiments of the present invention, the exhaust rod further includes a pressure relief portion, which is located at an end of the sealing portion away from the guide portion. The outer surface of the pressure relief portion has an air relief groove, and the air relief groove cooperates with the inner surface of the rubber ring to connect the inside and outside of the water tank.

[0019] What is beneficial is that: by arranging a pressure relief part on the exhaust rod, the pressure relief part is located at the end of the sealing part away from the guide part, and an air relief groove is arranged on the outer surface of the pressure relief part, and the air relief groove cooperates with the inner surface of the rubber ring to connect the inside and outside of the water tank. Therefore, when the water in the water tank is heated too quickly and the pressure in the water tank is too high, the water vapor in the water tank will push the exhaust rod out of the water tank, so that the rubber ring cooperates with the pressure relief part, and then connects the inside and outside of the water tank, facilitates the pressure relief of the water tank, and improves safety.

[0020] According to some embodiments of the present invention, two side-by-side spring buckles are provided at one end of the exhaust rod away from the rod cap, the support member has a first through hole for accommodating the exhaust rod, and the two spring buckles are used to support the support member.

[0021] What is beneficial is that: two side-by-side spring clips are provided at one end of the exhaust rod away from the rod cap, the support member has a first through hole for accommodating the exhaust rod, and the two spring clips are used to support the support member. It can be understood that the two spring clips can be close to each other, thereby facilitating the support member to pass through the two spring clips and be mounted on the exhaust rod.

[0022] According to some embodiments of the present invention, a screw portion and a threaded portion accommodating the screw portion are provided between an end of the exhaust rod away from the rod cap and the support member, and the screw portion and the threaded portion are cooperatively connected.

[0023] Advantageously, a screw portion and a threaded portion accommodating the screw portion are provided between the end of the exhaust rod away from the rod cap and the support member, and the screw portion and the threaded portion are cooperatively connected, thereby facilitating the connection between the exhaust rod and the support member.

[0024] According to some embodiments of the present invention, a plurality of water inlet holes are provided, and the plurality of water inlet holes are arranged along the circumference of the sliding rod portion.

[0025] Advantageously, by providing a plurality of water inlet holes, the plurality of water inlet holes are arranged along the circumference of the slide rod portion, so that when water is added to the water tank, the pressure of the water on the one-way valve is more balanced.

[0026] According to some embodiments of the present invention, the closing portion is a bowl-shaped structure with an opening facing upward.

[0027] The benefit is that: by making the closing part into a bowl-shaped structure with the opening facing upward, the water vapor in the water tank forms an inward-wrapped support for the bottom of the closing part, thereby making the support of the water vapor for the closing part more stable, and further, enabling the closing part to better seal the water inlet.

[0028] A coffee machine according to an embodiment of a second aspect of the present invention includes a water supply device as described in the first aspect of the present invention.

[0029] A coffee machine according to an embodiment of the present invention has at least the following beneficial effects:

[0030] 1. By arranging a water inlet on the top wall of the water tank and a water inlet hole on the water inlet, it is convenient to add water to the water tank from the water inlet. In addition, by arranging an exhaust hole on the top wall of the water tank, it is convenient to discharge the air in the water tank from the exhaust hole, balance the pressure inside and outside the water tank, and avoid the air in the water tank from not being able to be discharged and affecting the addition of water to the water tank.

[0031] It can be understood that when water or water vapor in the water tank lifts the one-way valve, the closing part can abut against the inner wall of the water tank, thereby, the closing part closes the water inlet, thereby preventing water or water vapor in the water tank from overflowing out of the water tank from the exhaust hole.

[0032] When the water tank is heated, the water vapor generated by the evaporation of water in the water tank will lift the exhaust rod, so that the sealing part seals the exhaust hole, thereby facilitating the pressurization of the water tank and increasing the water pressure of the water supply device.

[0033] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0035] Figure 1 This is a schematic structural diagram of a water supply device according to an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A top view of a water supply device is shown;

[0037] Figure 3 for Figure 2 AA cross-sectional view shown;

[0038] Figure 4 for Figure 3 An enlarged view of the natural exhaust state at A is shown;

[0039] Figure 5 for Figure 3 An enlarged view of the sealing state at A is shown;

[0040] Figure 6 for Figure 3 An enlarged view of the pressure relief state at point A is shown;

[0041] Figure 7 for Figure 3 A schematic diagram of another connection method between the exhaust rod and the support member at A is shown.

[0042] Figure markings: 100-water tank, 110-water inlet, 120-water inlet hole, 130-exhaust hole, 140-water outlet, 150-one-way valve, 160-limiting part, 170-sliding rod part, 180-closing part, 190-exhaust rod, 200-rubber ring, 210-guide part, 220-sealing part, 230-exhaust groove, 240-rod cap, 250-spring, 260-support part, 270-sinking platform, 280-pressure relief part, 290-air relief groove, 300-first through hole, 310-spring buckle, 320-screw part, 330-threaded part. DETAILED DESCRIPTION

[0043] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0045] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] A water supply device and a coffee machine according to embodiments of the present invention are described below with reference to the accompanying drawings.

[0048] Reference Figure 1 、 Figure 2 and Figure 3 A water supply device according to an embodiment of the present invention includes a water tank 100, a one-way valve 150 and an exhaust rod 190.

[0049] The water tank 100 is used to store water. The top wall of the water tank 100 has a water inlet 110 and an exhaust hole 130 . The water inlet 110 has a water inlet hole 120 . The bottom of the water tank 100 has a water outlet 140 .

[0050] In this embodiment, a water inlet 110 is provided on the top wall of the water tank 100, and a water inlet hole 120 is provided on the water inlet 110, so as to facilitate the addition of water to the water tank 100 from the water inlet 110. In addition, an exhaust hole 130 is provided on the top wall of the water tank 100, so as to facilitate the discharge of air inside the water tank 100 from the exhaust hole 130, thereby balancing the pressure inside and outside the water tank 100 and preventing the air inside the water tank 100 from being unable to be discharged and affecting the addition of water to the water tank 100.

[0051] As for the one-way valve 150, the one-way valve 150 is installed in the water inlet part 110. The one-way valve 150 includes a limiting part 160, a sliding rod part 170 and a closing part 180 connected in sequence. The limiting part 160 is used to abut against the outer wall of the water tank 100 for limiting, the sliding rod part 170 is slidably connected to the water inlet part 110, and the closing part 180 is used to abut against the inner wall of the water tank 100 to close the water inlet hole 120.

[0052] In this embodiment, a one-way valve 150 is installed in the water inlet portion 110. It can be understood that the one-way valve 150 can allow water to enter the water tank 100 from outside the water tank 100, and at the same time, prevent water or water vapor from overflowing from the water inlet hole 120 outside the water tank 100. As a result, the water tank 100 does not need to be provided with a box cover, thereby reducing the operation of opening the box cover when adding water to the water tank 100, and facilitating the rapid addition of water to the water tank 100. In addition, the one-way valve 150 includes a limiting portion 160, a sliding rod portion 170 and a closing portion 180 connected in sequence. The limiting portion 160 is used to contact the water tank 100. The outer wall of the water tank 100 abuts against the limit, thereby preventing the one-way valve 150 from falling into the water tank 100 due to its own gravity. At the same time, the sliding rod portion 170 is slidably connected to the water inlet portion 110, and the closing portion 180 is used to abut against the inner wall of the water tank 100 to close the water inlet hole 120. It can be understood that when the water or water vapor in the water tank 100 lifts the one-way valve 150, the closing portion 180 can abut against the inner wall of the water tank 100, thereby, the closing portion 180 closes the water inlet, thereby preventing the water or water vapor in the water tank 100 from overflowing from the water tank 100 through the exhaust hole 130.

[0053] In some specific embodiments, a plurality of water inlet holes 120 may be provided, and the plurality of water inlet holes 120 are arranged along the circumference of the sliding rod portion 170 .

[0054] In this embodiment, a plurality of water inlet holes 120 are provided, and the plurality of water inlet holes 120 are arranged along the circumference of the slide rod portion 170 , so that when water is added to the water tank 100 , the pressure of water on the one-way valve 150 is more balanced.

[0055] In some specific embodiments, the closing portion 180 may be in a bowl-shaped structure with an opening facing upward.

[0056] In this embodiment, the closing portion 180 is formed into a bowl-shaped structure with the opening facing upward, so that the water vapor in the water tank 100 forms an inward-wrapped support for the bottom of the closing portion 180, thereby making the support of the water vapor on the closing portion 180 more stable, and further, enabling the closing portion 180 to better seal the water inlet 120.

[0057] Reference Figure 4 and Figure 5 As for the exhaust rod 190, the exhaust rod 190 is installed on the exhaust hole 130. The exhaust rod 190 includes a rod cap 240, a guide part 210 and a sealing part 220 connected in sequence along the axial direction of the exhaust rod 190. The rod cap 240 is used to abut and limit the outer wall of the water tank 100. The guide part 210 slides in cooperation with the exhaust hole 130. The exhaust rod 190 also has an exhaust groove 230 connecting the outside of the water tank 100, the rod cap 240 and the guide part 210. The exhaust groove 230 is used for exhaust, and the sealing part 220 is used to seal the exhaust hole 130.

[0058] In this embodiment, an exhaust rod 190 is installed on the exhaust hole 130. The exhaust rod 190 includes a rod cap 240, a guide portion 210 and a sealing portion 220 connected in sequence along the axial direction of the exhaust rod 190. The rod cap 240 is used to abut against the outer wall of the water tank 100 to limit the position, thereby preventing the exhaust rod 190 from falling into the water tank 100 due to its own gravity when there is no water vapor support. At the same time, the guide portion 210 slides in cooperation with the exhaust hole 130. The exhaust rod 190 also has an exhaust groove 230 that connects the outside of the water tank 100, the rod cap 240 and the guide portion 210. The exhaust groove 230 is used for exhausting gas, and the sealing portion 220 is used to seal the exhaust hole 130. It can be understood that when water is added to the water tank 100, the exhaust rod 190 moves closer to the water tank 100 due to its own gravity, so that the exhaust groove 230 connects the inside and outside of the water tank 100, thereby facilitating the water tank 100 to discharge the air in the water tank 100 from the exhaust hole 130, balancing the pressure inside and outside the water tank 100, and avoiding the air in the water tank 100 from not being able to be discharged and affecting the addition of water to the water tank 100. When the water tank 100 is heated, the water in the water tank 100 evaporates due to heat and generates water vapor which lifts the exhaust rod 190, so that the sealing part 220 seals the exhaust hole 130, thereby facilitating the pressurization of the inside of the water tank 100 and increasing the water pressure of the water supply device.

[0059] In some specific embodiments, a rubber ring 200 may be further provided in the water tank 100. The rubber ring 200 is mounted on the exhaust rod 190. The outer surface of the rubber ring 200 is used to abut and seal against the inner wall of the water tank 100. The inner surface of the rubber ring 200 is used to seal tightly with the sealing part 220. The rubber ring 200 and the sealing part 220 cooperate to seal the exhaust hole 130.

[0060] In this embodiment, a rubber ring 200 is provided in the water tank 100, and the rubber ring 200 is mounted on the exhaust rod 190. The outer surface of the rubber ring 200 is used to abut and seal with the inner wall of the water tank 100, and the inner surface of the rubber ring 200 is used to tightly seal with the sealing part 220. It can be understood that when the water tank 100 is filling with water, the guide part 210 cooperates with the exhaust hole 130 to make the inside and outside of the water tank 100 connected, thereby facilitating the discharge of air in the water tank 100. When the water tank 100 needs to be heated and pressurized after the water tank 100 is filled, the water vapor generated by the heated water in the water tank 100 can push the exhaust rod 190 out of the water tank 100, thereby making the outer surface of the rubber ring 200 abut and seal with the inner wall of the water tank 100, and the inner surface of the rubber ring 200 tightly seals with the sealing part 220, thereby facilitating the increase of the air pressure in the water tank 100.

[0061] In some specific embodiments, the rubber ring 200 can be slidably connected to the exhaust rod 190. A spring 250 and a support member 260 are also provided in the water tank 100. The support member 260 is provided at the end of the exhaust rod 190 away from the rod cap 240. The two ends of the spring 250 are respectively in contact with the rubber ring 200 and the support member 260. The spring 250 is used to drive the exhaust rod 190 to move toward the inside of the water tank 100.

[0062] In this embodiment, the rubber ring 200 is slidably connected to the exhaust rod 190, and a spring 250 and a support member 260 are arranged in the water tank 100. The support member 260 is arranged at the end of the exhaust rod 190 away from the rod cap 240. The two ends of the spring 250 are respectively in contact with the rubber ring 200 and the support member 260. The spring 250 is used to drive the exhaust rod 190 to move toward the inside of the water tank 100. Therefore, when the water vapor in the water tank 100 pushes the exhaust rod 190 to move outside the water tank 100 to release pressure, the spring 250 can drive the exhaust rod 190 to move back to the inside of the water tank 100, thereby restoring the pressure maintaining state of the exhaust rod 190, so that the water tank 100 can supply water normally.

[0063] In some specific embodiments, a step may be provided between the guide portion 210 and the sealing portion 220 , and a sink 270 for accommodating the step is provided at one end of the rubber ring 200 close to the guide portion 210 , and the sink 270 cooperates with the step to limit the position.

[0064] In this embodiment, a step is provided between the guide portion 210 and the sealing portion 220, and a sink 270 for accommodating the step is provided at one end of the rubber ring 200 close to the guide portion 210. The sink 270 cooperates with the step to limit the position, thereby making the rubber ring 200 and the exhaust rod 190 fit more closely, and the sealing effect between the rubber ring 200 and the sealing portion 220 is better.

[0065] Reference Figure 6 In some specific embodiments, the exhaust rod 190 may further include a pressure relief portion 280, which is located at one end of the sealing portion 220 away from the guide portion 210. The outer surface of the pressure relief portion 280 has an air relief groove 290, which cooperates with the inner surface of the rubber ring 200 to connect the inside and outside of the water tank 100.

[0066] In this embodiment, a pressure relief portion 280 is provided on the exhaust rod 190. The pressure relief portion 280 is located at the end of the sealing portion 220 away from the guide portion 210. An air relief groove 290 is provided on the outer surface of the pressure relief portion 280. The air relief groove 290 cooperates with the inner surface of the rubber ring 200 to connect the inside and outside of the water tank 100. Therefore, when the water in the water tank 100 is heated too quickly and the pressure in the water tank 100 is too high, the water vapor in the water tank 100 will push the exhaust rod 190 to the outside of the water tank 100, so that the rubber ring 200 cooperates with the pressure relief portion 280, and then connects the inside and outside of the water tank 100, facilitates the pressure relief of the water tank 100, and improves safety.

[0067] In some specific embodiments, two side-by-side spring buckles 310 may be provided at one end of the exhaust rod 190 away from the rod cap 240 , and the support member 260 has a first through hole 300 for accommodating the exhaust rod 190 , and the two spring buckles 310 are used to support the support member 260 .

[0068] In this embodiment, two side-by-side spring clips 310 are provided at one end of the exhaust rod 190 away from the rod cap 240. The support member 260 has a first through hole 300 for accommodating the exhaust rod 190. The two spring clips 310 are used to support the support member 260. It can be understood that the two spring clips 310 can be close to each other, thereby facilitating the support member 260 to pass through the two spring clips 310 and be mounted on the exhaust rod 190.

[0069] Reference Figure 7 In other embodiments, a screw portion 320 and a threaded portion 330 for accommodating the screw portion 320 may be provided between the end of the exhaust rod 190 away from the rod cap 240 and the support member 260, and the screw portion 320 and the threaded portion 330 are cooperatively connected.

[0070] In this embodiment, a screw portion 320 and a threaded portion 330 for accommodating the screw portion 320 are provided between the end of the exhaust rod 190 away from the rod cap 240 and the support member 260. The screw portion 320 and the threaded portion 330 are cooperatively connected, thereby facilitating the connection between the exhaust rod 190 and the support member 260.

[0071] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A water supply device, characterized in that: include: A water tank for storing water, wherein the top wall of the water tank has a water inlet and an exhaust hole, the water inlet has a water inlet hole, and the bottom of the water tank has a water outlet; a one-way valve, mounted on the water inlet, comprising a limiting portion, a sliding rod portion, and a closing portion connected in sequence, wherein the limiting portion is used to abut against the outer wall of the water tank for limiting position, the sliding rod portion is slidably connected to the water inlet, and the closing portion is used to abut against the inner wall of the water tank to close the water inlet hole; an exhaust rod, mounted on the exhaust hole, comprising a rod cap, a guide portion, and a sealing portion sequentially connected along the axial direction of the exhaust rod, wherein the rod cap is used to abut against the outer wall of the water tank for limiting position, and the guide portion slides in cooperation with the exhaust hole. The exhaust rod further comprises an exhaust groove communicating with the outside of the water tank, the rod cap, and the guide portion, the exhaust groove being used for exhausting gas, and the sealing portion being used to seal the exhaust hole; A rubber ring is further provided in the water tank, and is sleeved on the exhaust rod. The outer surface of the rubber ring is used to abut and seal against the inner wall of the water tank, and the inner surface of the rubber ring is used to seal tightly against the sealing portion. The rubber ring and the sealing portion cooperate to seal the exhaust hole. The rubber ring is slidably connected to the exhaust rod, and a spring and a support member are further provided in the water tank. The support member is provided at one end of the exhaust rod away from the rod cap, and the two ends of the spring are respectively in contact with the rubber ring and the support member, and the spring is used to drive the exhaust rod to move toward the inside of the water tank; The exhaust rod further includes a pressure relief portion, the pressure relief portion being located at an end of the sealing portion away from the guide portion, the outer surface of the pressure relief portion having a gas relief groove, the gas relief groove cooperating with the inner surface of the rubber ring to connect the inside and outside of the water tank; There is a step between the guide portion and the sealing portion, and a sink for accommodating the step is provided at one end of the rubber ring close to the guide portion, and the sink cooperates with the step to limit position.

2. A water supply device according to claim 1, characterized in that: One end of the exhaust rod away from the rod cap is provided with two side-by-side spring buckles, the support member has a first through hole for accommodating the exhaust rod, and the two spring buckles are used to support the support member.

3. A water supply device according to claim 1, characterized in that: A screw portion and a threaded portion accommodating the screw portion are provided between one end of the exhaust rod away from the rod cap and the support member, and the screw portion and the threaded portion are cooperatively connected.

4. A water supply device according to claim 1, characterized in that: There are a plurality of water inlet holes, which are arranged along the circumference of the sliding rod.

5. A water supply device according to claim 1, characterized in that: The closing portion is in a bowl-shaped structure with its opening facing upward.

6. A coffee machine, characterized in that: A water supply device comprising any one of claims 1 to 5.

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