Three-way valve and coffee machine

Abstract

The three-way valve comprises a valve body and a movable mechanism, the valve body is provided with a first inner cavity, the side wall of the valve body is connected with a water inlet pipe and a first water outlet pipe, the water inlet pipe and the first water outlet pipe are arranged in the axial direction of the valve body, and the water inlet pipe and the first water outlet pipe are both communicated with the first inner cavity; the movable mechanism comprises a valve element, a piston rod and a first spring, the valve element is slidably connected to the valve body and provided with a second inner cavity and a second water outlet pipe, the second water outlet pipe communicates with the second inner cavity, the piston rod penetrates through the valve element, the piston rod is fixedly connected to the bottom wall of the first inner cavity, and a sealing block is arranged on the piston rod in a protruding mode in the radial direction. The sealing block can be in sealing connection with the valve element so that the first inner cavity and the second inner cavity can be separated or communicate, and the two ends of the first spring abut against the valve body and the valve element correspondingly so as to drive the valve element to move in the direction away from the valve body. The water flow can be conveniently controlled, the structure is simple and compact, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a three-way valve and a coffee machine. Background Art

[0002] When brewing coffee, the coffee machine needs to heat and boil water, and then transport the hot water to different water-using mechanisms. Existing coffee machines usually control the flow direction of water through solenoid valves, but the solenoid valves are expensive to use and are prone to malfunction, affecting the reliability of the coffee machine. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model provides a three-way valve with a simple structure, which can conveniently control the flow of water and improve reliability.

[0004] The utility model also provides a coffee machine with the three-way valve.

[0005] According to an embodiment of the first aspect of the utility model, a three-way valve is provided, including a valve body and a movable mechanism, the valve body is provided with a first inner cavity, the side wall of the valve body is connected to a water inlet pipe and a first water outlet pipe, the water inlet pipe and the first water outlet pipe are arranged along the axial direction of the valve body, and the water inlet pipe and the first water outlet pipe are both communicated with the first inner cavity; the movable mechanism includes a valve core, a piston rod and a first spring, the valve core is slidably connected to the valve body so that the valve core can block the first water outlet pipe, the valve core is provided with a second inner cavity, the valve core is provided with a second water outlet pipe, the second water outlet pipe is communicated with the second inner cavity, the piston rod is penetrated by the valve core, and the piston rod is fixedly connected to the bottom wall of the first inner cavity, the piston rod is provided with a sealing block protruding in the radial direction, the sealing block can be sealed and connected to the valve core so that the first inner cavity and the second inner cavity are separated or communicated, and the two ends of the first spring respectively abut the valve body and the valve core to drive the valve core to move in a direction away from the valve body.

[0006] The three-way valve of the embodiment of the utility model has at least the following beneficial effects: the valve core is slidably connected to the valve body, the water inlet pipe and the first water outlet pipe are connected to the side wall of the valve body, and the water inlet pipe and the first water outlet pipe are arranged along the axial direction of the valve body, the piston rod is inserted into the valve core, and the piston rod abuts against the bottom wall of the first inner cavity, and the sealing block is arranged on the side wall of the piston rod, driving the valve core to slide in the valve body so that the sealing block can separate or connect the first inner cavity and the second inner cavity. When the first spring is in an extended state, the valve core moves in a direction away from the valve body, and the sealing block is sealed and connected to the valve core so that the first inner cavity and the second inner cavity are separated, so that the water flow can enter the first inner cavity from the water inlet pipe and then be discharged from the first water outlet pipe; when the first spring is in a compressed state, the valve core moves in a direction close to the valve body so that the valve core blocks the first water outlet pipe, and the sealing block is separated from the valve core so that the first inner cavity is connected with the second inner cavity, so that the water flow can flow from the water inlet pipe into the second inner cavity and be discharged from the second water outlet pipe. By adjusting the position of the valve core in the valve body, the flow of water can be conveniently controlled, and the action of the electromagnetic valve can be replaced. The structure is simple and compact, and the reliability is improved.

[0007] According to some embodiments of the present utility model, the movable mechanism further includes a second spring, and two ends of the second spring respectively abut against the valve core and the piston rod to drive the piston rod to abut against the bottom wall of the first inner cavity.

[0008] According to some embodiments of the present utility model, the piston rod is provided with a plurality of guide grooves, the guide grooves are arranged along the axial direction of the piston rod, and the plurality of guide grooves are arranged at intervals along the circumferential direction of the piston rod.

[0009] According to some embodiments of the utility model, the sealing block is provided with a first installation groove along the circumferential direction, the first installation groove is connected to a first sealing ring, and the first sealing ring can abut against the valve core.

[0010] According to some embodiments of the utility model, the valve core is provided with a second installation groove along the circumferential direction, the second installation groove is connected to a second sealing ring, and the second sealing ring can abut against the valve body.

[0011] According to some embodiments of the utility model, a retaining ring is provided at the end of the valve core close to the valve body, the valve body is provided with a limiting cylinder, the retaining ring is slidably connected to the limiting cylinder, and the retaining ring can abut against the bottom wall of the limiting cylinder.

[0012] According to some embodiments of the utility model, a guide groove is provided on the side wall of the limiting cylinder, and the guide groove is arranged along the axial direction of the limiting cylinder. A guide block is protruding from the side wall of the valve core, and the guide block is slidably connected to the guide groove.

[0013] According to some embodiments of the present invention, along the axial direction of the limiting cylinder, the thickness of the guide block gradually decreases toward the valve body.

[0014] According to some embodiments of the utility model, the guide grooves and the guide blocks are both provided in plural numbers, the guide grooves are arranged at intervals along the circumference of the limiting cylinder, and the guide grooves and the guide blocks are in one-to-one correspondence.

[0015] According to an embodiment of the second aspect of the utility model, a coffee machine is provided, comprising the three-way valve of the embodiment of the first aspect of the utility model.

[0016] The coffee machine of the embodiment of the utility model has at least the following beneficial effects: by setting the three-way valve of the embodiment of the first aspect of the utility model, the flow of water can be conveniently controlled, and the structural size of the coffee machine can be reduced, the possibility of failure of the coffee machine is reduced, and the reliability of the coffee machine is improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 Schematic diagram of a three-way valve according to the first embodiment of the utility model;

[0020] Figure 2 It is an exploded schematic diagram of a three-way valve according to an embodiment of the first aspect of the utility model;

[0021] Figure 3 is a cross-sectional view of a three-way valve according to an embodiment of the first aspect of the utility model;

[0022] Figure 4 yes Figure 3 A local enlarged view of point A;

[0023] Figure 5 yes Figure 3 A partial enlarged view of point B.

[0024] Description of reference numerals:

[0025] The valve body 100, the first inner cavity 110, the water inlet pipe 120, the first water outlet pipe 130, the limiting cylinder 140, and the guide groove 141;

[0026] Movable mechanism 200, valve core 210, second inner cavity 211, second water outlet pipe 212, second mounting groove 213, second sealing ring 214, retaining ring 215, guide block 216, first connecting tube 217, second connecting tube 218, third sealing ring 219, piston rod 220, sealing block 221, guide groove 222, first mounting groove 223, first sealing ring 224, first spring 230, second spring 240. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, 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, and 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, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] It is understandable that, referring to Figures 1 to 3The three-way valve of the first embodiment of the utility model comprises a valve body 100 and a movable mechanism 200. The valve body 100 is provided with a first inner cavity 110. The side wall of the valve body 100 is connected with a water inlet pipe 120 and a first water outlet pipe 130. The water inlet pipe 120 and the first water outlet pipe 130 are arranged along the axial direction of the valve body 100. The water inlet pipe 120 and the first water outlet pipe 130 are both connected to the first inner cavity 110. The movable mechanism 200 comprises a valve core 210, a piston rod 220 and a first spring 230. The valve core 210 is slidably connected to the valve body 100 so that the valve core 210 can block the first water outlet pipe 130. The valve core 210 is connected to the first inner cavity 110. 210 is provided with a second inner cavity 211, and the valve core 210 is provided with a second water outlet pipe 212, the second water outlet pipe 212 is connected with the second inner cavity 211, the piston rod 220 is penetrated by the valve core 210, and the piston rod 220 is fixedly connected to the bottom wall of the first inner cavity 110, and the piston rod 220 is provided with a sealing block 221 protruding radially, and the sealing block 221 can be sealed and connected with the valve core 210 to separate or connect the first inner cavity 110 and the second inner cavity 211, and the two ends of the first spring 230 respectively abut the valve body 100 and the valve core 210 to drive the valve core 210 to move in a direction away from the valve body 100.

[0032] The valve core 210 is slidably connected to the valve body 100, the water inlet pipe 120 and the first water outlet pipe 130 are connected to the side wall of the valve body 100, and the water inlet pipe 120 and the first water outlet pipe 130 are arranged along the axial direction of the valve body 100, the first spring 230 is arranged between the valve body 100 and the valve core 210, the piston rod 220 is passed through the valve core 210, and the piston rod 220 abuts against the bottom wall of the first inner cavity 110, and the sealing block 221 protrudes radially along the piston rod 220 so that the sealing block 221 can be sealed and connected to the valve core 210, thereby separating or connecting the first inner cavity 110 and the second inner cavity 211.

[0033] The valve core 210 is driven to slide in the valve body 100 to compress or release the first spring 230. When the first spring 230 is in an extended state, the first spring 230 drives the valve core 210 to move in a direction away from the valve body 100, and the sealing block 221 is sealed and connected to the valve core 210 to separate the first inner cavity 110 and the second inner cavity 211, so that the water flow can enter the first inner cavity 110 from the water inlet pipe 120, and then be discharged from the first water outlet pipe 130; when the first spring 230 is in a compressed state, the valve core 210 moves in a direction close to the valve body 100, so that the valve core 210 blocks the first water outlet pipe 130, and the sealing block 221 is separated from the valve core 210 to connect the first inner cavity 110 and the second inner cavity 211, so that the water flow can enter the first inner cavity 110 from the water inlet pipe 120, and then flow from the first inner cavity 110 into the second inner cavity 211, and finally be discharged from the second water outlet pipe 212.

[0034] By adjusting the position of the valve core 210 in the valve body 100, the flow of water can be conveniently controlled, and the action of the solenoid valve can be replaced, so that the three-way valve structure is simple and compact, the cost is reduced, and the reliability is improved.

[0035] It should be noted that the two ends of the first spring 230 respectively abut the valve body 100 and the valve core 210, so that the first spring 230 can drive the valve core 210 to move in a direction away from the valve body 100, and by pressing the valve core 210, the valve core 210 can move axially along the valve body 100, so that the valve core 210 can block the water inlet end of the first water outlet pipe 130, and the sealing block 221 is separated from the valve core 210, so that the first inner cavity 110 and the second inner cavity 211 are connected, thereby avoiding the first water outlet pipe 130 and the second water outlet pipe 212 from discharging water at the same time, thereby improving the reliability of the three-way valve.

[0036] It is understandable that, referring to Figure 2 and Figure 3 The movable mechanism 200 further includes a second spring 240, the two ends of which respectively abut against the valve core 210 and the piston rod 220 to drive the piston rod 220 to abut against the bottom wall of the first inner cavity 110. One end of the second spring 240 abuts against the valve core 210, and the other end abuts against the piston rod 220 to drive the piston rod 220 to move away from the valve core 210, so that the piston rod 220 can abut against the bottom wall of the first inner cavity 110, thereby stabilizing the piston rod 220 on the bottom wall of the first inner cavity 110, facilitating the fixing of the position of the piston rod 220, reducing the position shaking of the piston rod 220, and eliminating the need for the piston rod 220 to be integrally formed on the valve body 100, thereby reducing the manufacturing cost of the three-way valve.

[0037] In addition, by providing the second spring 240, the valve core 210 can be driven to move in a direction away from the valve body 100, so that the first spring 230 and the second spring 240 can cooperate to drive the valve core 210 to move, thereby reducing the force on the first spring 230 and the second spring 240, thereby reducing the possibility of fatigue failure of the first spring 230 and the second spring 240, extending the service life of the first spring 230 and the second spring 240, and improving the reliability of the three-way valve.

[0038] It is understandable that, referring to Figure 3 and Figure 4 The piston rod 220 is provided with a plurality of guide grooves 222, which are arranged along the axial direction of the piston rod 220, and the plurality of guide grooves 222 are arranged at intervals along the circumference of the piston rod 220. The guide grooves 222 are arranged along the axial direction of the piston rod 220, and the flow area of ​​the water flow can be increased by providing the guide grooves 222, so that the water flow can flow smoothly from the first inner cavity 110 into the second inner cavity 211, and the water flow can be prevented from accumulating at the sealing block 221, thereby improving the smoothness of the water flow.

[0039] The number of the guide grooves 222 is set to be multiple, and by arranging multiple guide grooves 222 at intervals along the circumference of the piston rod 220, the flow area of ​​the water flow can be increased and the flow efficiency of the water flow can be improved.

[0040] It should be noted that the distances between two adjacent guide grooves 222 are equal so that the force exerted by the water flow on the piston rod 220 is equal, thereby balancing the force on the piston rod 220, reducing the position shaking of the piston rod, and improving the flow stability of the water flow.

[0041] It is understandable that, referring to 3 and Figure 4 The sealing block 221 is provided with a first mounting groove 223 along the circumferential direction, and the first mounting groove 223 is connected with a first sealing ring 224, and the first sealing ring 224 can abut against the valve core 210. The first mounting groove 223 is provided on the sealing block 221, and the first sealing ring 224 is installed in the first mounting groove 223, and the first sealing ring 224 can abut against the valve core 210. By providing the first sealing ring 224, the sealing block 221 and the valve core 210 can be tightly connected, thereby reducing the gap between the sealing block 221 and the valve core 210, preventing water from seeping out of the gap between the sealing block 221 and the valve core 210, improving the sealing performance of the three-way valve, preventing the second water outlet pipe 212 from dripping, and improving the user experience.

[0042] In addition, the valve core 210 can move axially along the piston rod 220 so that the first sealing ring 224 frequently abuts against the valve core 210. By arranging the first sealing ring 224 to be installed in the first installation groove 223, the position of the first sealing ring 224 can be stabilized, reducing the possibility of the first sealing ring 224 loosening and improving the reliability of the three-way valve.

[0043] Specifically, refer to Figure 2 and Figure 3 The valve core 210 is provided with a second mounting groove 213 along the circumference, and the second mounting groove 213 is connected with a second sealing ring 214, and the second sealing ring 214 can abut against the valve body 100. The second mounting groove 213 is arranged on the valve core 210, and the second sealing ring 214 is arranged in the second mounting groove 213, so that the second sealing ring 214 can be stabilized in the second mounting groove 213, and the possibility of the second sealing ring 214 being loosened is reduced. The second sealing ring 214 can abut against the valve body 100, and the valve core 210 and the valve body 100 can be tightly connected by setting the second sealing ring 214, so that the gap between the valve core 210 and the valve body 100 can be reduced, so that the valve core 210 can block the first water outlet pipe 130, and prevent the first water outlet pipe 130 from dripping, thereby improving the reliability of the three-way valve and enhancing the user experience.

[0044] It is understandable that, referring to Figure 2 and Figure 3The end of the valve core 210 close to the valve body 100 is provided with a retaining ring 215, and the valve body 100 is provided with a limiting cylinder 140, and the retaining ring 215 is slidably connected to the limiting cylinder 140, and the retaining ring 215 can abut the bottom wall of the limiting cylinder 140. The retaining ring 215 is slidably connected to the limiting cylinder 140, so that the retaining ring 215 can slide along the axial direction of the limiting cylinder 140, so that the valve core 210 can move smoothly in the valve body 100, and by setting the retaining ring 215 to abut the bottom wall of the limiting cylinder 140, the position of the retaining ring 215 can be limited, and the valve core 210 is prevented from being overly pressed down, and the valve core 210 is prevented from blocking the water inlet pipe 120, so that the three-way valve can operate stably, and the reliability of the three-way valve is improved.

[0045] Specifically, refer to Figure 3 and Figure 5 The side wall of the limiting cylinder 140 is provided with a guide groove 141, which is arranged along the axial direction of the limiting cylinder 140. A guide block 216 is protruding from the side wall of the valve core 210, and the guide block 216 is slidably connected to the guide groove 141. The guide groove 141 is provided on the side wall of the limiting cylinder 140, and the guide groove 141 is arranged along the axial direction of the limiting cylinder 140. The guide block 216 is provided on the side wall of the valve core 210. By providing the guide block 216 to slide in the guide groove 141, the movement direction of the valve core 210 in the valve body 100 is guided, so that the valve core 210 can slide smoothly in the valve body 100, and the valve core 210 can be prevented from rotating in the limiting cylinder 140, thereby improving the movement stability of the valve core 210.

[0046] It should be noted that by setting the guide block 216 to be slidably connected to the guide groove 141, the guide block 216 can move along the length direction of the guide groove 141, and the guide block 216 can abut the two ends of the guide groove 141, thereby limiting the movement stroke of the guide block 216, and further limiting the position of the valve core 210, so that the three-way valve can operate stably and the reliability of the three-way valve is improved.

[0047] Specifically, refer to Figure 3 and Figure 5 Along the axial direction of the limiting cylinder 140, the thickness of the guide block 216 gradually decreases toward the valve body 100. By setting the thickness of the guide block 216 to gradually decrease toward the valve body 100, the valve core 210 can be smoothly installed in the valve body 100, thereby improving the assembly convenience of the three-way valve.

[0048] It should be noted that the driving valve core 210 is pressed in along the axial direction of the valve body 100 so that the guide block 216 can abut against the inner wall of the limiting cylinder 140, and the guide block 216 can open the limiting cylinder 140 so that the limiting cylinder 140 is deformed in the direction away from the guide block 216, and then the guide block 216 slides into the guide groove 141, and then the limiting cylinder 140 is reset, so that the guide block 216 can be stably in the guide groove 141, and there is no need to install it through fasteners, thereby improving the assembly convenience of the three-way valve.

[0049] Specifically, refer to Figure 3 and Figure 5 , there are multiple guide grooves 141 and guide blocks 216, and multiple guide grooves 141 are arranged at intervals along the circumference of the limiting cylinder 140, and the guide grooves 141 and the guide blocks 216 are in one-to-one correspondence. By arranging multiple guide grooves 141 at intervals along the circumference of the limiting cylinder 140, the force on a single guide block 216 can be reduced, thereby reducing the possibility of the guide block 216 breaking and failing, extending the service life, and improving the reliability of the three-way valve. In addition, by providing multiple guide grooves 141 and multiple guide blocks 216, the valve core 210 can be balanced in force in the valve body 100, reducing the position shaking of the valve core 210, and improving the movement stability of the valve core 210.

[0050] It is understandable that, referring to Figure 2 and Figure 3 The valve core 210 includes a first connection tube 217 and a second connection tube 218, a third sealing ring 219 is arranged between the first connection tube 217 and the second connection tube 218, the second water outlet pipe 212 is arranged in the first connection tube 217, and the sealing block 221 can be sealed and connected with the second connection tube 218. By arranging the first connection tube 217 and the second connection tube 218 to be connected together, the processing difficulty of the valve core 210 can be reduced, the valve core 210 does not need to be integrally formed, the manufacturing cost of the valve core 210 is reduced, the position of the second water outlet pipe 212 is arranged conveniently, and the connection with the sealing block 221 is convenient.

[0051] In addition, the third sealing ring 219 is arranged between the first connecting tube 217 and the second connecting tube 218 to tightly connect the first connecting tube 217 and the second connecting tube 218 to prevent water from seeping into the gap between the first connecting tube 217 and the second connecting tube 218, thereby improving the sealing performance of the valve core 210, avoiding water leakage of the three-way valve, and improving the reliability of the three-way valve.

[0052] It can be understood that the coffee machine of the second embodiment of the utility model includes the three-way valve of the first embodiment of the utility model. Since it has all the technical features of the three-way valve of the embodiment of the utility model, it also has the beneficial effects of all the above embodiments, which will not be repeated here.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Three-way valve, characterized in that, include: A valve body is provided with a first inner cavity, a side wall of the valve body is connected with a water inlet pipe and a first water outlet pipe, the water inlet pipe and the first water outlet pipe are arranged along the axial direction of the valve body, and the water inlet pipe and the first water outlet pipe are both connected with the first inner cavity; The movable mechanism includes a valve core, a piston rod and a first spring. The valve core is slidably connected to the valve body so that the valve core can block the first water outlet pipe. The valve core is provided with a second inner cavity. The valve core is provided with a second water outlet pipe, and the second water outlet pipe is communicated with the second inner cavity. The piston rod is penetrated by the valve core and fixedly connected to the bottom wall of the first inner cavity. The piston rod is provided with a sealing block protruding radially, and the sealing block can be sealed and connected to the valve core to separate or communicate the first inner cavity and the second inner cavity. The two ends of the first spring respectively abut the valve body and the valve core to drive the valve core to move in a direction away from the valve body.

2. The three-way valve according to claim 1, characterized in that: The movable mechanism further includes a second spring, two ends of which respectively abut against the valve core and the piston rod to drive the piston rod to abut against the bottom wall of the first inner cavity.

3. The three-way valve according to claim 1, characterized in that: The piston rod is provided with a plurality of guide grooves, the guide grooves are arranged along the axial direction of the piston rod, and the plurality of guide grooves are arranged at intervals along the circumferential direction of the piston rod.

4. The three-way valve according to claim 1, characterized in that: The sealing block is provided with a first installation groove along the circumferential direction, the first installation groove is connected with a first sealing ring, and the first sealing ring can abut against the valve core.

5. The three-way valve according to claim 4, characterized in that: The valve core is provided with a second installation groove along the circumferential direction, the second installation groove is connected with a second sealing ring, and the second sealing ring can abut against the valve body.

6. The three-way valve according to claim 1, characterized in that: The end of the valve core close to the valve body is provided with a retaining ring, the valve body is provided with a limiting cylinder, the retaining ring is slidably connected to the limiting cylinder, and the retaining ring can abut against the bottom wall of the limiting cylinder.

7. The three-way valve according to claim 6, characterized in that: A guide groove is formed on the side wall of the limiting cylinder, and the guide groove is arranged along the axial direction of the limiting cylinder. A guide block is protruding from the side wall of the valve core, and the guide block is slidably connected to the guide groove.

8. The three-way valve according to claim 7, characterized in that: Along the axial direction of the limiting cylinder, the thickness of the guide block gradually decreases toward the direction approaching the valve body.

9. The three-way valve according to claim 7, characterized in that: There are a plurality of guide grooves and a plurality of guide blocks, and the plurality of guide grooves are arranged at intervals along the circumference of the limiting cylinder, and the guide grooves and the guide blocks are in one-to-one correspondence.

10. A coffee machine, characterized in that The invention comprises a three-way valve as claimed in any one of claims 1 to 9.

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