Coffee machine

Abstract

The coffee machine comprises a water tank, a change-over valve, a heating device and an extraction assembly, the change-over valve comprises a first water inlet channel, a second water inlet channel and a first water outlet channel, the first water inlet channel communicates with the water tank, a first one-way valve assembly is arranged in the first water inlet channel, and liquid in the water tank can flow into the change-over valve through the first one-way valve assembly; the heating device communicates with the water tank and the second water inlet channel, and liquid in the water tank can flow into the change-over valve through the second water inlet channel after being heated by the heating device; the extraction assembly is communicated with the first water outlet channel, and liquid in the change-over valve can flow into the extraction assembly through the first water outlet channel. The first one-way valve assembly is arranged in the first water inlet channel, so that the first water inlet channel achieves the one-way sealing effect that water only enters but does not flow out, high-temperature liquid in the second water inlet channel can be prevented from flowing to the cold water pipeline along the first water inlet channel, and the situation that cold water and hot water are mixed is avoided.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and in particular to a coffee machine. Background Art

[0002] A coffee machine usually includes a water tank, a heating device, a conversion valve and an extraction component. When the coffee machine is in a cold extraction state, the room temperature liquid in the water tank flows to the extraction component through the conversion valve. When the coffee machine is in a hot extraction state, the water in the water tank will first be heated by the heating device, and then flow to the extraction component through the conversion valve. Since the water inlet and outlet channels of the conversion valve are interconnected, it is easy for hot water to flow back into the cold water channel, causing a mixture of cold and hot water, resulting in inaccurate temperature control of the coffee machine. Utility Model Content

[0003] The present application provides a coffee machine, which can solve the problem of easy mixing of cold and hot water in the prior art.

[0004] The present application provides a coffee machine, comprising

[0005] Water tank;

[0006] The conversion valve comprises a first water inlet channel, a second water inlet channel and a first water outlet channel, wherein the first water inlet channel is connected to the water tank, a first one-way valve assembly is arranged in the first water inlet channel, and liquid in the water tank can flow into the conversion valve through the first one-way valve assembly;

[0007] a heating device, connected to the water tank and the second water inlet channel respectively, so that the liquid in the water tank can flow into the conversion valve through the second water inlet channel after being heated by the heating device;

[0008] The extraction component is communicated with the first water outlet channel, and the liquid in the conversion valve can flow into the extraction component through the first water outlet channel.

[0009] In the above scheme, the conversion valve is connected to the water tank, the heating device and the extraction component respectively, and the room temperature liquid in the water tank can flow to the conversion valve, and flow to the first water outlet channel through the first water inlet channel, and then flow to the extraction component, thereby realizing the cold extraction function of the coffee machine. Alternatively, the room temperature liquid in the water tank can flow to the heating device for heating, and the heated high temperature liquid or high temperature steam can flow to the first water outlet channel through the second water inlet channel, and then flow to the extraction component, thereby realizing the hot extraction function of the coffee machine. Usually, in order to use the extraction function normally, the pipeline pressure on the side of the heating device is usually slightly greater than the pipeline pressure on the side of the extraction component to ensure that the liquid in the first water inlet channel or the second water inlet channel can flow smoothly to the second water inlet channel. Therefore, when water flows through the first water inlet channel, the liquid in the first water inlet channel will flow to the extraction component first, thus avoiding the mixing of cold and hot water caused by the room temperature liquid in the first water inlet channel flowing along the second water inlet channel to the hot water pipeline. On this basis, the conversion valve provided in the present application is provided with a first one-way valve assembly in the first water inlet channel, so that the first water inlet channel can achieve a one-way sealing effect of only taking in water but not out of water, and can prevent the high-temperature liquid in the second water inlet channel from flowing along the first water inlet channel to the cold water pipeline, thereby avoiding the mixing of cold and hot water.

[0010] The coffee machine provided by the present application prevents the high-temperature liquid in the second water inlet channel from flowing to the cold water pipeline along the first water inlet channel by setting the first one-way valve assembly in the first water inlet channel of the conversion valve, realizes the separation of the cold and hot water inlet pipelines, and avoids the mixing of cold and hot water, thereby improving the temperature control accuracy of the coffee machine. In particular, when the water pressure of the high-temperature liquid is too large, the first one-way valve assembly can prevent the high-temperature liquid from entering the cold water pipeline and affecting the normal operation of other front-end equipment, reduce the possibility of equipment failure, and improve the working stability of the coffee machine.

[0011] In a possible design, a first water opening is provided in the first water inlet channel; the first one-way valve assembly includes a first valve plug, and the first valve plug is movably installed in the conversion valve for blocking or opening the first water opening.

[0012] In the above scheme, when water flows through the first water inlet channel, the first valve plug can be moved away from the first water opening, so that the first water opening is in an open state, and the water in the first water inlet channel can enter the conversion valve through the first water opening; when water does not flow through the first water inlet channel, the first valve plug can be moved to block the first water opening, so that the first water opening is in a closed state, and the water in the conversion valve cannot flow into the first water inlet channel through the first water opening, thereby achieving a one-way sealing effect of the first water inlet channel.

[0013] In a possible design, the first valve plug includes a sealing portion, and the sealing portion is provided with a sealing surface for sealing the first water opening, and the sealing surface is a curved surface.

[0014] In the above scheme, when water flows through the first water inlet channel, the water flow impacts the sealing surface, and the curved surface has a better diversion effect. The water flow can flow rapidly along the curved surface, avoiding excessive pressure on the middle part of the sealing surface, which is beneficial to improving the service life of the first valve plug.

[0015] In a possible design, the first valve plug also includes a mounting portion fixedly connected to the sealing portion, and the first one-way valve assembly also includes a first return spring, which is sleeved on the mounting portion; an abutment portion is provided in the conversion valve, and two ends of the first return spring are respectively abutted against the abutment portion and the sealing portion.

[0016] In the above scheme, when water flows through the first water inlet channel, the first valve plug can move toward the abutment portion under the pressure of the water flow impact, so that the blocking portion moves away from the first water opening, thereby opening the first water opening, and at this time, the first return spring is in a compressed state; when water does not flow through the first water inlet channel, the first return spring can drive the first valve plug to reset under the action of its own restoring force, so that the blocking portion blocks the first water opening. When water does not flow through the first water inlet channel, the first return spring can provide certain support for the blocking portion, ensuring that the first valve plug will only move downward to open the first water opening under a certain pressure, thereby improving the sealing effect of the first valve plug on the first water opening.

[0017] In a possible design, the conversion valve includes a first valve body and a second valve body connected to each other, the first water inlet channel is located in the first valve body, and the second water inlet channel and the first water outlet channel are located in the second valve body; an accommodating cavity is formed between the first valve body and the second valve body, and the first one-way valve assembly is installed in the accommodating cavity.

[0018] In the above solution, when the first valve body and the second valve body are fixedly connected, a receiving cavity is formed between the two to accommodate the first one-way valve assembly. The split structure of the conversion valve makes it easier to install and disassemble the first one-way valve assembly.

[0019] In a possible design, the second valve body also includes a second water outlet channel, the coffee machine also includes a steam component, the steam component includes a steam valve and a steam handle, the steam valve is connected to the second water outlet channel and the steam handle respectively; the steam valve is used to connect the second water outlet channel with the steam handle in an open state so that the liquid in the conversion valve can flow into the steam handle; the steam valve is used to cut off the connection between the second water outlet channel and the steam handle in a closed state.

[0020] In the above scheme, the steam valve is used to control the connection between the second water outlet channel and the steam handle. When the steam valve is opened, the high-temperature liquid or high-temperature steam heated by the heating device can flow to the second water outlet channel through the second water inlet channel and then flow to the steam handle to realize the hot water or steam outlet function of the coffee machine; when the steam valve is closed, the connection between the second water outlet channel and the steam handle is cut off, and the high-temperature liquid or high-temperature steam heated by the heating device can flow to the first water outlet channel through the second water inlet channel and then flow to the extraction component.

[0021] In a possible design, the first water inlet channel extends in the axial direction of the conversion valve, and the second water inlet channel, the first water outlet channel, and the second water outlet channel all extend in the radial direction of the conversion valve.

[0022] In the above scheme, the second water inlet channel, the first water outlet channel and the second water outlet channel are in the same plane, and the first water inlet channel is arranged perpendicular to the plane, so that the conversion valve has a three-dimensional structure, which saves axial space and can improve the space utilization inside the coffee machine.

[0023] In a possible design, the coffee machine also includes a solenoid valve, which is respectively connected to the water tank, the first water inlet channel and the second water inlet channel; the solenoid valve is used to connect the water tank with the first water inlet channel, or the solenoid valve is used to connect the water tank with the heating device.

[0024] In the above scheme, by setting a solenoid valve, the water circuit can be switched, and two valves are not needed to control the water inlet of the conversion valve and the heating device respectively, which saves the number of equipment, simplifies the internal structure of the coffee machine, and thus reduces the cost of the coffee machine.

[0025] In a possible design, the extraction component includes a second one-way valve component, and the liquid in the first water outlet channel can flow into the extraction component through the second one-way valve component.

[0026] In the above scheme, the second one-way valve assembly can prevent the liquid in the extraction assembly from flowing back into the conversion, thus avoiding the mixing of hot and cold water. On the other hand, because the second one-way valve assembly requires a certain pressure to open, when the steam valve is opened, the water will flow to the steam assembly first. At this time, the pressure of the remaining water is not enough to open the second one-way valve assembly, thus achieving the control of the flow direction of high-temperature liquid or high-temperature steam.

[0027] In a possible design, the coffee machine also includes a water pump and a safety valve, and the water tank, the water pump, the safety valve and the solenoid valve are connected in sequence; the safety valve is also connected to the water tank, and when the safety valve is open, it is used to allow part of the liquid in the water pump to flow back to the water tank.

[0028] In the above scheme, the water pump is connected between the water tank and the solenoid valve to pump the water in the water tank into the solenoid valve to ensure that the water pressure reaches the standard. When the water pressure of the water pump transporting liquid to the solenoid valve is too high, the return water end will automatically open to allow part of the liquid to flow back into the water tank to achieve the purpose of pressure relief.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the coffee machine provided in this application;

[0031] Figure 2 for Figure 1 A partial structural diagram of a coffee machine;

[0032] Figure 3 for Figure 2 A schematic diagram of the structure of the conversion valve;

[0033] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the conversion valve when the first water outlet is closed;

[0034] Figure 5 for Figure 3 Exploded view of the conversion valve in;

[0035] Figure 6 for Figure 3 A schematic diagram of the cross-sectional structure of the conversion valve when the first water outlet is opened;

[0036] Figure 7 for Figure 2 A schematic cross-sectional structure diagram of an extraction component in FIG.

[0037] Figure 8 for Figure 2 Exploded view of the extraction component in ;

[0038] Fig. 9 for Figure 4 Schematic diagram of the cross-sectional structure of the conversion valve in another perspective.

[0039] Reference numerals:

[0040] 100-housing;

[0041] 1- Water tank;

[0042] 2-conversion valve;

[0043] 201-first valve body;

[0044] 202- second valve body;

[0045] 202A-abutment portion;

[0046] 202B-Mounting seat;

[0047] 202C- the second water outlet;

[0048] 203-accommodating chamber;

[0049] 204- Fasteners;

[0050] 205-first sealing ring;

[0051] 21- first water inlet channel;

[0052] 211-first water outlet;

[0053] 211A- inclined guide surface;

[0054] 22- second water inlet channel;

[0055] 23- first water outlet channel;

[0056] 24- second water outlet channel;

[0057] 25-a first one-way valve assembly;

[0058] 251-first valve plug;

[0059] 251A- blocking part;

[0060] 251Aa-sealing surface;

[0061] 251B-installation department;

[0062] 252-first return spring;

[0063] 26- water channel;

[0064] 3- Heating device;

[0065] 4- Extraction component;

[0066] 41 - second one-way valve assembly;

[0067] 411 - second valve plug;

[0068] 412-second return spring;

[0069] 42- extraction head;

[0070] 43- Extraction handle;

[0071] 44-water pipe joint;

[0072] 45- second sealing ring;

[0073] 5-Steam component;

[0074] 51-steam valve;

[0075] 52-Steam handle;

[0076] 53-knob;

[0077] 6- Solenoid valve;

[0078] 7- Water pump;

[0079] 8-Safety valve;

[0080] 9- Flow meter.

[0081] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0082] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0083] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0084] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0085] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0086] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0087] The present application embodiment provides a coffee machine, such as Figure 1 and Figure 2 As shown, the coffee machine includes a water tank 1, a conversion valve 2, a heating device 3 and an extraction component 4. The conversion valve 2 includes a first water inlet channel 21, a second water inlet channel 22 and a first water outlet channel 23. The first water inlet channel 21 is connected to the water tank 1. A first one-way valve component 25 is arranged in the first water inlet channel 21. The liquid in the water tank 1 can flow into the conversion valve 2 through the first one-way valve component 25; the heating device 3 is connected to the water tank 1 and the second water inlet channel 22 respectively. The liquid in the water tank 1 can flow into the conversion valve 2 through the second water inlet channel 22 after being heated by the heating device 3; the extraction component 4 is connected to the first water outlet channel 23. The liquid in the conversion valve 2 can flow into the extraction component 4 through the first water outlet channel 23.

[0088] In this embodiment, Figure 1 As shown, the coffee machine includes a housing 100, a water tank 1, a conversion valve 2 and a heating device 3 are all installed inside the housing 100, the water tank 1 is used to store room temperature liquid (such as water), and the extraction component 4 is installed outside the housing 100 for containing food powder (such as coffee powder). Figure 2 and Figure 3 As shown, the conversion valve 2 is connected to the water tank 1, the heating device 3 and the extraction component 4 respectively, and the room temperature liquid in the water tank 1 can flow to the conversion valve 2, and then flow to the first water outlet channel 23 through the first water inlet channel 21, and then flow to the extraction component 4, thereby realizing the cold extraction function of the coffee machine. Alternatively, the room temperature liquid in the water tank 1 can flow to the heating device 3 for heating, and the heated high temperature liquid or high temperature steam can flow to the first water outlet channel 23 through the second water inlet channel 22, and then flow to the extraction component 4, thereby realizing the hot extraction function of the coffee machine.

[0089] Normally, in order to ensure the normal use of the extraction function, the pipeline pressure on the side of the heating device 3 is usually slightly greater than the pipeline pressure on the side of the extraction component 4, so as to ensure that the liquid in the first water inlet channel 21 or the second water inlet channel 22 can flow smoothly to the second water inlet channel 22. Therefore, when water flows through the first water inlet channel 21, the liquid in the first water inlet channel 21 will flow to the extraction component 4 first, thus avoiding the mixing of cold and hot water caused by the room temperature liquid in the first water inlet channel 21 flowing along the second water inlet channel 22 to the hot water pipeline. On this basis, Figure 4 As shown, the conversion valve 2 provided in the present application is provided with a first one-way valve assembly 25 in the first water inlet channel 21, so that the first water inlet channel 21 can achieve a one-way sealing effect of only taking in water but not out water, and can prevent the high-temperature liquid in the second water inlet channel 22 from flowing along the first water inlet channel 21 to the cold water pipeline, thereby avoiding the mixing of cold and hot water.

[0090] Therefore, the coffee machine provided by the present application prevents the high-temperature liquid in the second water inlet channel 22 from flowing to the cold water pipeline along the first water inlet channel 21 by setting the first one-way valve assembly 25 in the first water inlet channel 21 of the conversion valve 2, realizes the separation of the cold and hot water inlet pipelines, and avoids the mixing of cold and hot water, thereby improving the temperature control accuracy of the coffee machine. In particular, when the water pressure of the high-temperature liquid is too large, the first one-way valve assembly 25 can prevent the high-temperature liquid from entering the cold water pipeline and affecting the normal operation of other front-end equipment, reduce the possibility of equipment failure, and improve the working stability of the coffee machine.

[0091] In a specific embodiment, Figure 4 and Figure 5 As shown, a first water opening 211 is provided in the first water inlet channel 21 , and the first one-way valve assembly 25 includes a first valve plug 251 , which is movably installed in the conversion valve 2 for blocking or opening the first water opening 211 .

[0092] In this embodiment, Figure 6 As shown, when water flows through the first water inlet channel 21, the first valve plug 251 can move away from the first water opening 211, so that the first water opening 211 is in an open state, and the water in the first water inlet channel 21 can enter the conversion valve 2 through the first water opening 211; Figure 4 As shown, when water does not flow through the first water inlet channel 21, the first valve plug 251 can move to block the first water opening 211, so that the first water opening 211 is in a closed state. Water in the conversion valve 2 cannot flow into the first water inlet channel 21 through the first water opening 211, thereby achieving a one-way sealing effect of the first water inlet channel 21.

[0093] In a specific embodiment, Figure 4 As shown, the first valve plug 251 includes a blocking portion 251A and a mounting portion 251B that are fixedly connected, and the blocking portion 251A is used to block the first water passage 211. The first one-way valve assembly 25 also includes a first return spring 252, which is sleeved on the mounting portion 251B. The conversion valve 2 is provided with an abutment portion 202A, and the two ends of the first return spring 252 are respectively abutted against the abutment portion 202A and the blocking portion 251A.

[0094] In this embodiment, Figure 4 As shown, when water flows through the first water inlet channel 21, the first valve plug 251 can move toward the abutment portion 202A under the pressure of the water flow impact, so that the blocking portion 251A is away from the first water opening 211, thereby opening the first water opening 211. At this time, the first return spring 252 is in a compressed state; Figure 6As shown, when water does not flow through the first water inlet channel 21, the first return spring 252 can drive the first valve plug 251 to return to its original position under the action of its own restoring force, so that the blocking portion 251A blocks the first water opening 211. When water does not flow through the first water inlet channel 21, the first return spring 252 can provide certain support for the blocking portion 251A, ensuring that the first valve plug 251 will move downward to open the first water opening 211 only under a certain pressure, thereby improving the sealing effect of the first valve plug 251 on the first water opening 211.

[0095] Specifically, Figure 4 As shown, a mounting seat 202B is also provided in the conversion valve 2, and the abutting portion 202A is provided around the mounting seat 202B. The two ends of the first return spring 252 are respectively sleeved on the mounting portion 251B and the mounting seat 202B, which can prevent the first return spring 252 from shaking, and can also ensure that the first return spring 252 directly and stably drives the first valve plug 251, thereby improving the movement stability of the first valve plug 251. In addition, in this embodiment, the abutting portion 202A and the mounting seat 202B are both internal structures of the conversion valve 2, and no additional parts are required, which can simplify the structure of the conversion valve 2 and improve assembly efficiency.

[0096] In a specific embodiment, Figure 4 As shown, the blocking portion 251A is provided with a blocking surface 251Aa for blocking the first water passage 211, and the blocking surface 251Aa is a curved surface.

[0097] In this embodiment, when water flows through the first water inlet channel 21, the water flows against the sealing surface 251Aa. The curved surface has a better guiding effect and the water can flow rapidly along the curved surface, thereby preventing the middle part of the sealing surface 251Aa from being subjected to excessive pressure, which is beneficial to improving the service life of the first valve plug 251.

[0098] And, if Figure 6 As shown, the first water outlet 211 has an inclined guide portion 211A, which cooperates with the arc-shaped sealing surface 251Aa to increase the contact area between the first valve plug 251 and the first water outlet 211. When the liquid in the second water inlet channel 22 flows to the first water outlet 211, the first valve plug 251 can be tightly attached to the inclined guide portion 211A to achieve a better sealing effect.

[0099] In a specific embodiment, Figure 4 and Figure 5 As shown, the conversion valve 2 includes a first valve body 201 and a second valve body 202 that are fixedly connected, the first water inlet channel 21 is located in the first valve body 201, the second water inlet channel 22 and the first water outlet channel 23 are located in the second valve body 202, and an accommodating cavity 203 is formed between the first valve body 201 and the second valve body 202, and the first one-way valve assembly 25 is installed in the accommodating cavity 203.

[0100] In this embodiment, a groove body is respectively provided on the first valve body 201 and the second valve body 202. When the first valve body 201 and the second valve body 202 are fixedly connected, a receiving cavity 203 is formed between the groove bodies to accommodate the first one-way valve assembly 25. The split structure of the conversion valve 2 makes it easier to install and disassemble the first one-way valve assembly 25.

[0101] like Figure 4 As shown, the conversion valve 2 also includes a fastener 204 and a first sealing ring 205. The first valve body 201 and the second valve body 202 are fixedly connected by the fastener 204. The first sealing ring 205 is clamped between the first valve body 201 and the second valve body 202 to achieve a sealing effect between the first valve body 201 and the second valve body 202 to prevent the liquid in the conversion valve 2 from leaking.

[0102] like Figure 4 and Figure 6 As shown, the mounting seat 202B is located on the second valve body 202, and the mounting seat 202B is provided with a second water port 202C. The second water port 202C is in a normally open state. When the first water port 211 is opened, the water in the first water inlet channel 21 can flow along the first water port 211 and the second water port 202C to the first water outlet channel 23, so as to realize the cold brew function of the coffee machine.

[0103] In a specific embodiment, Figure 2 As shown, the second valve body 202 also includes a second water outlet channel 24, and the coffee machine also includes a steam component 5, the steam component 5 includes a steam valve 51 and a steam handle 52, the steam valve 51 is connected to the second water outlet channel 24 and the steam handle 52 respectively; the steam valve 51 is used to connect the second water outlet channel 24 and the steam handle 52 in the open state, so that the liquid in the conversion valve 2 can flow into the steam handle 52; the steam valve 51 is used to cut off the connection between the second water outlet channel 24 and the steam handle 52 in the closed state.

[0104] In this embodiment, the steam valve 51 is used to control the connection between the second water outlet channel 24 and the steam handle 52. When the steam valve 51 is opened, the high-temperature liquid or high-temperature steam heated by the heating device 3 can flow to the second water outlet channel 24 through the second water inlet channel 22 and then flow to the steam handle 52 to realize the hot water or steam output function of the coffee machine; when the steam valve 51 is closed, the connection between the second water outlet channel 24 and the steam handle 52 is cut off, and the high-temperature liquid or high-temperature steam heated by the heating device 3 can flow to the first water outlet channel 23 through the second water inlet channel 22 and then flow to the extraction component 4.

[0105] Specifically, the steam assembly 5 further includes a control switch electrically or mechanically connected to the steam valve 51. The control switch may be a knob 53. The opening or closing of the steam valve 51 is controlled by rotating the knob 53. Figure 1 As shown, the knob 53 can be installed on the outer wall of the housing 100 to facilitate user operation.

[0106] In addition, if Figure 7 As shown, the extraction component 4 includes a second one-way valve component 41 , and the liquid in the first water outlet channel 23 can flow into the extraction component 4 through the second one-way valve component 41 .

[0107] By setting the second one-way valve assembly 41, this embodiment can prevent the liquid in the extraction assembly 4 from flowing back into the conversion valve 2, thereby avoiding the mixing of hot and cold water; on the other hand, because the second one-way valve assembly 41 requires a certain pressure to open, when the steam valve 51 is opened, the water will flow to the steam assembly 5 first. At this time, the remaining water pressure is not enough to open the second one-way valve assembly 41, thus realizing the control of the flow direction of high-temperature liquid or high-temperature steam. Therefore, it is only necessary to rotate the knob 53 to control the liquid in the conversion valve 2 to flow along the first water outlet channel 23 to the extraction assembly 4 or to control the liquid in the conversion valve 2 to flow along the second water outlet channel 24 to the steam assembly 5, thereby improving the convenience of operation of the coffee machine.

[0108] like Figure 7 and Figure 8 As shown, the extraction component 4 includes an extraction head 42, an extraction handle 43 and a water pipe connector 44. The extraction head 42 is fixedly connected to the housing 100. The water pipe connector 44 is used to realize the water connection between the extraction component 4 and the conversion valve 2. The extraction handle 43 is detachably connected to the extraction head 42. A filter for holding food powder is arranged in the extraction handle 43. High-temperature liquid enters the filter to extract the food, and the obtained extract can flow to the outside through the liquid outlet of the extraction handle 43.

[0109] The second one-way valve assembly 41 is installed in the cavity formed between the water pipe joint 44 and the extraction head 42. The second one-way valve assembly 41 includes a second valve plug 411 and a second return spring 412. The working principles of the second valve plug 411 and the second return spring 412 are the same as those of the first valve plug 251 and the first return spring 252, which will not be described in detail here. In addition, a second sealing ring 45 is provided at the connection between the water pipe joint 44 and the extraction head 42 to improve the sealing effect between the water pipe joint 44 and the extraction head 42 to prevent liquid leakage.

[0110] In a specific embodiment, Figure 6 and Fig. 9 As shown, the first water inlet channel 21 extends along the axial direction Z of the conversion valve 2 , and the second water inlet channel 22 , the first water outlet channel 23 and the second water outlet channel 24 all extend along the radial direction X of the conversion valve 2 .

[0111] In this embodiment, the second water inlet channel 22, the first water outlet channel 23 and the second water outlet channel 24 are in the same plane, and the first water inlet channel 21 is arranged perpendicular to the plane, so that the conversion valve 2 has a three-dimensional structure, saving space on the axial direction X and improving the space utilization inside the coffee machine.

[0112] In addition, if Figure 4 and Fig. 9 As shown, the second valve body 202 is further provided with a water passage 26 , which is communicated with the second water port 202C, and the second water inlet channel 22 , the first water outlet channel 23 and the second water outlet channel 24 are communicated with each other through the water passage 26 .

[0113] In a specific embodiment, Figure 2 As shown, the coffee machine also includes a solenoid valve 6, which is respectively connected to the water tank 1, the first water inlet channel 21 and the second water inlet channel 22. The solenoid valve 6 is used to connect the water tank 1 with the first water inlet channel 21, or the solenoid valve 6 is used to connect the water tank 1 with the heating device 3.

[0114] In this embodiment, the solenoid valve 6 is a three-way valve having a water inlet and two water outlets, wherein the water inlet is used to communicate with the water tank 1, and the two water outlets are used to communicate with the conversion valve 2 and the heating device 3 respectively. The solenoid valve 6 has a shunt structure inside. The shunt structure can open the water outlet connected to the conversion valve 2 and close the water outlet connected to the heating device 3 under program control, thereby realizing the water path connection between the water tank 1 and the conversion valve 2. The shunt structure can also close the water outlet connected to the conversion valve 2 and open the water outlet connected to the heating device 3 under program control, thereby realizing the water path connection between the water tank 1 and the heating device. That is, by setting the solenoid valve 6, the water path switching can be realized, and there is no need for two valves to control the water inlet of the conversion valve 2 and the heating device 3 respectively, which saves the number of equipment, simplifies the internal structure of the coffee machine, and thus reduces the cost of the coffee machine.

[0115] Specifically, Figure 2 As shown, the coffee machine also includes a water pump 7 and a safety valve 8. The water tank 1, the water pump 7, the safety valve 8 and the solenoid valve 6 are connected in sequence. The safety valve 8 is also connected to the water tank 1. When the safety valve 8 is in the open state, it is used to allow part of the liquid in the water pump 7 to flow back to the water tank 1.

[0116] like Figure 2As shown, the water pump 7 is connected between the water tank 1 and the solenoid valve 6, and is used to pump the water in the water tank 1 into the solenoid valve 6 to ensure that the water pressure reaches the standard. The safety valve 8 is a three-way valve structure, which has a water inlet end, a water outlet end and a water return end. The water inlet end is used to communicate with the water pump 7, and the water outlet end is used to communicate with the solenoid valve 6. The water tank 1 includes a water outlet and a water return port. The water outlet is connected to the water pump 7, and the water return port is connected to the water return end of the safety valve 8. When the water return end of the safety valve 8 is in a normally closed state, when the water pressure of the water pump to the solenoid valve 6 is too high (for example, greater than 15Bar), the water return end will automatically open to allow part of the liquid to flow back into the water tank 1 to achieve the purpose of pressure relief. In addition, a flow meter 9 can be set between the water outlet of the water tank 1 and the water pump 7 to detect the water flow rate of the water tank 1, so that the user can adjust it conveniently. A thermostat can also be set between the heating device 3 and the second water inlet channel 22 to control the heating temperature of the heating device 3.

[0117] In summary, when the coffee machine is in the cold extraction state, the water outlet connected to the solenoid valve 6 and the conversion valve 2 is in the open state, the water outlet connected to the solenoid valve 6 and the heating device 3 is in the closed state, the steam valve 51 is also in the closed state, and the room temperature liquid in the water tank 1 flows into the extraction component 4 through the water pump 7, the solenoid valve 6, the first water inlet channel 21, and the first water outlet channel 23; when the coffee machine is in the hot extraction state, the water outlet connected to the solenoid valve 6 and the conversion valve 2 is in the closed state, the water outlet connected to the solenoid valve 6 and the heating device 3 is in the open state, the steam valve 51 is in the closed state, and the room temperature liquid in the water tank 1 flows into the extraction component 4 through the water pump 7, the solenoid valve 6, the first water inlet channel 21, and the first water outlet channel 23. The water pump 7 and the solenoid valve 6 flow into the heating device 3 for heating, and the heated high-temperature liquid or high-temperature steam flows into the extraction component 4 through the second water inlet channel 22 and the first water outlet channel 23; when the coffee machine is in the steam or hot water state, the water outlet connected to the solenoid valve 6 and the conversion valve 2 is in a closed state, the water outlet connected to the solenoid valve 6 and the heating device 3 is in an open state, and the steam valve 51 is in an open state, and the normal temperature liquid in the water tank 1 flows into the heating device 3 through the water pump 7 and the solenoid valve 6 for heating, and the heated high-temperature liquid or high-temperature steam flows into the steam component 5 through the second water inlet channel 22 and the second water outlet channel 24.

[0118] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coffee machine, characterized in that: include: Water tank (1); The conversion valve (2) comprises a first water inlet channel (21), a second water inlet channel (22) and a first water outlet channel (23), wherein the first water inlet channel (21) is in communication with the water tank (1), a first one-way valve assembly (25) is arranged in the first water inlet channel (21), and liquid in the water tank (1) can flow into the conversion valve (2) through the first one-way valve assembly (25); a heating device (3) which is in communication with the water tank (1) and the second water inlet channel (22) respectively, so that the liquid in the water tank (1) can flow into the conversion valve (2) through the second water inlet channel (22) after being heated by the heating device (3); The extraction component (4) is in communication with the first water outlet channel (23), and the liquid in the conversion valve (2) can flow into the extraction component (4) through the first water outlet channel (23).

2. The coffee machine according to claim 1, characterized in that A first water opening (211) is provided in the first water inlet channel (21); The first one-way valve assembly (25) comprises a first valve plug (251), which is movably installed in the conversion valve (2) and is used to block or open the first water opening (211).

3. The coffee machine according to claim 2, characterized in that The first valve plug (251) comprises a blocking portion (251A), the blocking portion (251A) being provided with a blocking surface (251Aa) for blocking the first water passage (211), and the blocking surface (251Aa) being an arc surface.

4. The coffee machine according to claim 3, characterized in that The first valve plug (251) further comprises a mounting portion (251B) fixedly connected to the blocking portion (251A); the first one-way valve assembly (25) further comprises a first return spring (252), and the first return spring (252) is sleeved on the mounting portion (251B); An abutment portion (202A) is provided in the conversion valve (2), and two ends of the first return spring (252) are respectively in abutment with the abutment portion (202A) and the blocking portion (251A).

5. The coffee machine according to claim 2, characterized in that: The conversion valve (2) comprises a first valve body (201) and a second valve body (202) connected to each other, the first water inlet channel (21) being located in the first valve body (201), and the second water inlet channel (22) and the first water outlet channel (23) being located in the second valve body (202); An accommodating cavity (203) is formed between the first valve body (201) and the second valve body (202), and the first one-way valve assembly (25) is installed in the accommodating cavity (203).

6. The coffee machine according to claim 5, characterized in that The second valve body (202) further comprises a second water outlet channel (24); the coffee machine further comprises a steam component (5); the steam component (5) comprises a steam valve (51) and a steam handle (52); the steam valve (51) is connected to the second water outlet channel (24) and the steam handle (52) respectively; The steam valve (51) is used to connect the second water outlet channel (24) and the steam handle (52) when in an open state, so that the liquid in the conversion valve (2) can flow into the steam handle (52); The steam valve (51) is used to cut off the communication between the second water outlet channel (24) and the steam handle (52) when in a closed state.

7. The coffee machine according to claim 6, characterized in that The first water inlet channel (21) extends along the axial direction of the conversion valve (2), and the second water inlet channel (22), the first water outlet channel (23) and the second water outlet channel (24) all extend along the radial direction of the conversion valve (2).

8. The coffee machine according to any one of claims 1 to 7, characterized in that The coffee machine further comprises a solenoid valve (6), wherein the solenoid valve (6) is respectively connected to the water tank (1), the first water inlet channel (21) and the second water inlet channel (22); The solenoid valve (6) is used to connect the water tank (1) with the first water inlet channel (21), or the solenoid valve (6) is used to connect the water tank (1) with the heating device (3).

9. The coffee machine according to any one of claims 1 to 7, characterized in that: The extraction component (4) comprises a second one-way valve component (41), and the liquid in the first water outlet channel (23) can flow into the extraction component (4) through the second one-way valve component (41).

10. The coffee machine according to claim 8, characterized in that The coffee machine further comprises a water pump (7) and a safety valve (8), wherein the water tank (1), the water pump (7), the safety valve (8) and the solenoid valve (6) are sequentially connected; The safety valve (8) is also connected to the water tank (1); when the safety valve (8) is in an open state, it is used to allow part of the liquid in the water pump (7) to flow back to the water tank (1).

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