Pressure relief assembly for adjusting water path pressure of water heating device and coffee machine with same

Abstract

The utility model relates to a pressure relief assembly for adjusting the water path pressure of a water heating device and a coffee machine with the pressure relief assembly, the pressure relief assembly for adjusting the water path pressure of the water heating device comprises a pressure relief assembly connected with a water conveying water path of the water heating device, and the pressure relief assembly comprises a switch valve and a pressure relief valve connected with the switch valve. The input end of the switch valve is connected with the water conveying waterway, the output end of the pressure release valve is connected with the water conveying waterway, when the water conveying waterway operates and the switch valve is in an open state, part of liquid in the water conveying waterway flows to the pressure release valve through the switch valve, and the liquid flows into the water conveying waterway again after being subjected to pressure reduction treatment through the pressure release valve, so that the pressure of the water conveying waterway is reduced; the utility model further discloses a coffee machine using the pressure relief assembly for adjusting the water path pressure of the water heating device. When the switch valve of the pressure relief assembly is in the open state, part of liquid in the water delivery waterway flows to the pressure relief valve through the switch valve to achieve pressure reduction treatment, so that the pressure of the water delivery waterway is reduced, and pressure adjustment of the water delivery waterway is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water heating devices, and particularly relates to a pressure relief assembly for regulating the water channel pressure of the water heating device and a coffee machine with the assembly. Background Art

[0002] In the prior art, there are two common pressure regulating structures for coffee machines. The first pressure regulating structure uses a one-way valve at the water outlet to control the water pressure when brewing coffee. Water is pressurized and pumped to the one-way valve by a water pump. After the water is decompressed by the one-way valve, it is transported to the coffee brewing structure for coffee making. The structure and function of the traditional one-way valve are simple, and the spring force in the one-way valve is fixed and cannot be adjusted. In addition, as the coffee machine is used for a longer time, the force of the spring will decline, affecting the normal operation of the water circuit of the coffee machine. If the pressure needs to be adjusted, the consumer or manufacturer's personnel need to manually replace the one-way valve parts, which poses a risk of damaging the coffee machine.

[0003] The second pressure regulation structure adds an adjustment screw to the structure of the traditional one-way valve. By tightening or loosening the screw, the spring force is adjusted to adjust the water pressure inside the coffee machine. This structure requires consumers to be familiar with the use of the coffee machine to adjust the pressure. It is not easy to operate and has certain limitations.

[0004] Therefore, further improvement is needed. Utility Model Content

[0005] The purpose of the present utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a pressure relief assembly for regulating the water pressure of a water heating device and a coffee machine having the same. When the switch valve is in the open state, part of the liquid in the water supply waterway flows through the switch valve to the pressure relief valve to achieve pressure reduction, thereby reducing the pressure of the water supply waterway and achieving pressure regulation of the water supply waterway.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0007] A pressure relief assembly for regulating the water line pressure of the water heating device, the pressure relief assembly comprising a pressure relief component connected to the water supply line of the water heating device, the pressure relief component comprising a switch valve and a pressure relief valve connected to the switch valve, the input end of the switch valve being connected to the water supply line, and the output end of the pressure relief valve being connected to the water supply line;

[0008] When the water supply waterway is in operation and the switch valve is in the open state, part of the liquid in the water supply waterway flows to the pressure relief valve through the switch valve. After the pressure reduction treatment of the pressure relief valve, the liquid flows back into the water supply waterway to reduce the pressure of the water supply waterway. When the switch valve is in the closed state, the liquid in the water supply waterway does not enter the pressure relief assembly.

[0009] In a further embodiment of the present invention, the pressure relief assembly is connected in parallel to the water supply channel, and the switch valve is a solenoid valve.

[0010] In a further solution of the present invention, the number of the pressure relief components is more than two, and the pressure relief values ​​of different pressure relief components on the water supply waterway are different or the same, or the number of the pressure relief component is one.

[0011] In a further embodiment of the present invention, the water supply circuit includes a water tank, a water pump assembly and a water heating mechanism connected in sequence;

[0012] The input end of the pressure relief component is connected between the water pump component and the water heating mechanism, and the output end of the pressure relief component is connected to the water tank.

[0013] In a further embodiment of the present invention, the pressure relief valve includes a valve body and a valve core arranged on the valve body. The valve body is provided with an input port and an output port. The valve core is provided with a pressure relief hole connecting the input port and the output port. The output end of the switch valve is connected to the input port of the pressure relief valve, and the output port of the pressure relief valve is connected to the water supply waterway. The liquid enters the input port of the pressure relief valve, and is discharged from the output port after the pressure is reduced through the pressure relief hole.

[0014] In a further embodiment of the present invention, the valve body is provided with a water transport cavity connecting the input port and the output port, the pressure relief hole is located in the water transport cavity, and the liquid enters the pressure relief valve from the input port, is depressurized through the pressure relief hole in the water transport cavity, and is discharged from the output port.

[0015] The valve core is provided with a first water groove connected to the valve body input port, the pressure relief hole connects the first water groove and the valve body output port, the valve core at least partially extends into the water transport cavity, and the first water groove and the pressure relief hole are located on the portion of the valve core extending into the water transport cavity;

[0016] The water transport cavity passes through both ends of the valve body, one end of the water transport cavity passing through the valve body is the input port of the valve body, and the other end of the water transport cavity passing through the valve body is used to install the valve core, and the output port of the valve body is located on one side of the water transport cavity, and the valve core is installed on the valve body through a threaded structure.

[0017] In a further embodiment of the present invention, the pressure relief valve includes a filter element provided corresponding to the input port and a first sealing element provided between the valve body and the valve core;

[0018] The valve core and the valve body are respectively provided with limiting steps for positioning both ends of the filter element. The limiting steps of the valve core are located on the outer side of the valve core, and the limiting steps of the valve body are located on the inner side of the valve body. The filter element is a filter screen and is barrel-shaped.

[0019] The first sealing member is located between the inner wall of the valve body and the side of the valve core. The first sealing member is sleeved on the valve core. The number of the first sealing members is two or more and they are arranged along the axial direction of the valve core. The two or more first sealing members are respectively located on both sides of the pressure relief hole along the axial direction of the valve core.

[0020] The valve core is provided with a first mounting groove for arranging a first sealing member, the first sealing member is a sealing ring, and the first mounting groove is located on the side of the valve body;

[0021] The valve core is provided with a second water groove for connecting the pressure relief hole and the output port of the valve body. A water passage area connected to the output port of the valve body is formed between the second water groove and the inner wall of the valve body. The second water groove is located on the side of the valve body.

[0022] In a further embodiment of the present invention, the pressure relief assembly includes a pressure relief valve connector, the output end of the pressure relief valve connector is connected to the water supply channel, and the input end of the pressure relief valve connector is connected to the output port of the pressure relief valve;

[0023] When there are two or more pressure relief assemblies, the different pressure relief assemblies are connected in parallel to the water supply channel, and the pressure relief valve output ports of the different pressure relief assemblies are respectively connected to the input ends of the pressure relief valve connectors so that the different pressure relief assemblies are arranged in parallel, and the pressure relief holes of the valve cores of the different pressure relief valves have different or the same diameters;

[0024] The pressure relief valve connector is provided with interfaces corresponding to different pressure relief valve output ports, and a second sealing member is provided between the pressure relief valve output port and the interface of the pressure relief valve connector;

[0025] The pressure relief valve output port is provided with a second mounting groove for arranging a second sealing member, the second mounting groove is located on the side of the pressure relief valve output port, and the second sealing member is a sealing ring;

[0026] The switch valve is connected to the pressure relief valve through a pipeline, and the pipeline is a pressure-resistant pipe.

[0027] A coffee machine comprises a pressure relief assembly for regulating the water circuit pressure of a water heating device.

[0028] In a further embodiment of the present invention, a control device is included, the control device being electrically connected to the on-off valve of the pressure relief assembly;

[0029] The water supply circuit includes a water tank, a water pump assembly and a water heating mechanism connected in sequence, the input end of the pressure relief assembly is connected between the water pump assembly and the water heating mechanism, the output end of the pressure relief assembly is connected to the water tank, and the control device is electrically connected to the water pump assembly and the water heating mechanism;

[0030] The water heating mechanism includes a hot water assembly, which includes a first heating pot, hot water pipes respectively connected to the first heating pot, a funnel assembly, and a pressure relief tank. Solenoid valves are respectively provided between the first heating pot and the hot water pipes, between the first heating pot and the funnel assembly, and between the first heating pot and the pressure relief tank. The solenoid valve between the first heating pot and the funnel assembly is connected to the pressure relief tank. Pressure sensors are respectively provided on the first heating pot and at the input end of the funnel assembly.

[0031] The water heating mechanism further includes a steam assembly, which includes a second heating pot and a steam pipe connected to the second heating pot, the second heating pot is connected to the first heating pot, and solenoid valves are respectively provided between the second heating pot and the steam pipe and between the first heating pot and the second heating pot, and the solenoid valve between the second heating pot and the steam pipe is connected to the pressure relief box;

[0032] Flow meters are respectively provided between the water tank and the water pump assembly, and between the output end of the pressure relief assembly and the water tank;

[0033] The water pump assembly includes a first water pump and a second water pump. The first water pump is connected between the water tank and the hot water assembly. A multi-way valve and a one-way valve connected in sequence are provided between the first water pump and the hot water assembly. A reflux valve connected to the water tank is provided between the first water pump and the multi-way valve. The second water pump is connected between the water tank and the steam assembly.

[0034] The beneficial effects of the utility model are as follows:

[0035] The pressure relief assembly of the utility model is connected to the water supply waterway of the water heating device (the water heating device can be a coffee machine). The pressure relief component is arranged in parallel with the water supply waterway. By opening the switch valve of the pressure relief component, the liquid in the water supply waterway passes through the switch valve and flows to the pressure relief valve through the switch valve to achieve pressure reduction processing, thereby reducing the pressure of the water supply waterway and realizing pressure regulation of the water supply waterway.

[0036] The utility model limits the aperture of the pressure relief hole of the valve core. After the liquid passes through the valve core, the water pressure is fixedly reduced, so that the pressure of the water supply water channel is fixedly reduced, thereby achieving pressure regulation of the water channel inside the water heating device (the water heating device can be a coffee machine). In addition, the pressure regulation effect of the pressure relief hole is more stable, and there is no attenuation of the spring force of the traditional one-way valve.

[0037] The present invention can also realize more than three pressure regulation modes by connecting two or more pressure relief components in parallel. When different pressure relief components have different pressure relief values ​​for the water supply waterway, the application of the water heating device (the water heating device can be a coffee machine) can be more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of a pressure relief assembly for regulating the water circuit pressure of a water heating device in some embodiments of the present invention.

[0039] Figure 2 for Figure 1 Enlarged view of part A.

[0040] Figure 3 This is an exploded view of a pressure relief assembly for regulating the water line pressure of a water heating device in some embodiments of the present invention.

[0041] Figure 4 This is a schematic diagram of the water circuit of the coffee machine of the utility model when it is in standby mode.

[0042] Figure 5 This is a schematic diagram of the water circuit when the coffee machine of the utility model is in the coffee state and the pressure relief assembly is not adjusted.

[0043] Figure 6 This is a schematic diagram of the water circuit when the coffee machine of the utility model is in the coffee state and one of the pressure relief components is adjusted.

[0044] Figure 7 This is a schematic diagram of the water circuit when the coffee machine of the utility model is in the coffee state and the two pressure relief components are adjusted.

[0045] Figure 8 This is a schematic diagram of the water circuit of the coffee machine of the utility model when it is in hot water state.

[0046] Figure 9 This is a schematic diagram of the water circuit of the coffee machine of the utility model when it is in a normal steam state.

[0047] Figure 10 This is a schematic diagram of the water circuit of the coffee machine of the utility model when it is in the enhanced steam state. DETAILED DESCRIPTION

[0048] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] like Figure 1-10 As shown, the pressure relief assembly for regulating the water line pressure of a water heating device can be applied to a coffee machine. The pressure relief assembly includes a pressure relief component 2 connected to a water supply line 1 of the water heating device. The pressure relief component 2 includes an on-off valve 3 and a pressure relief valve 4 connected to the on-off valve 3. The input end of the on-off valve 3 is connected to the water supply line 1, and the output end of the pressure relief valve 4 is connected to the water supply line 1.

[0050] When the water supply channel 1 is running and the switch valve 3 is in the open state, part of the liquid in the water supply channel 1 flows to the pressure relief valve 4 through the switch valve 3. After the pressure reduction treatment of the pressure relief valve 4, the liquid flows back into the water supply channel 1 to reduce the pressure of the water supply channel 1, thereby realizing the pressure regulation of the water supply channel 1. When the switch valve 3 is in the closed state, the liquid in the water supply channel 1 does not enter the pressure relief component 2 and does not affect the pressure of the water supply channel 1.

[0051] The pressure relief assembly of the utility model has a simple structure and low cost. By adding the pressure relief assembly to the water heating device, the pressure regulating function of the water channel of the water heating device is increased, making the application of the water heating device more flexible.

[0052] In some embodiments of the present invention, the pressure relief assembly 2 is connected in parallel to the water supply channel 1, which facilitates the configuration of more than two pressure relief assemblies 2 and helps avoid excessive adjustments to the structure of the water supply channel 1. The switch valve 3 is a solenoid valve.

[0053] In a further solution of the present invention, the number of pressure relief components 2 is more than two. In this embodiment, the number of pressure relief components 2 is two. Different pressure relief components 2 have different or the same pressure relief values ​​for the water supply channel 1. Pressure relief components 2 with different pressure relief values ​​can achieve a variety of different pressure regulation effects, making the application of the water heating device more flexible. When more than two pressure relief components 2 are opened at the same time, the pressure drop of the water supply channel 1 is the sum of the pressure relief values ​​of the opened pressure relief components 2. When only one pressure relief component 2 is opened, the pressure drop of the water supply channel 1 is the pressure relief value of the corresponding opened pressure relief component 2.

[0054] Alternatively, in another embodiment of the present invention, the number of the pressure relief component 2 is one.

[0055] In some embodiments of the present invention, the water supply circuit 1 includes a water tank, a water pump assembly, and a water heating mechanism connected in sequence;

[0056] The input end of the pressure relief component 2 is connected between the water pump component and the water heating mechanism, the output end of the pressure relief component 2 is connected to the water tank, the water supply channel 1 is running, the switch valve 3 is in the open state, and the liquid pressurized by the water pump component passes through the switch valve 3. The liquid flows to the pressure relief valve 4 through the switch valve 3 to achieve pressure reduction processing, thereby reducing the pressure of the water supply channel 1 and realizing pressure regulation of the water supply channel 1.

[0057] In some embodiments of the present invention, Figure 1-3As shown, the pressure relief valve 4 includes a valve body 41 and a valve core 42 arranged on the valve body 41. The valve body 41 is provided with an input port 411 and an output port 412. The valve core 42 is provided with a pressure relief hole 421 connecting the input port 411 and the output port 412. The output end of the switch valve 3 is connected to the input port 411 of the pressure relief valve 4, and the output port 412 of the pressure relief valve 4 is connected to the water supply channel 1. The liquid enters from the input port 411 of the pressure relief valve 4, and is discharged from the output port 412 after the pressure is reduced through the pressure relief hole 421. Due to the aperture restriction of the pressure relief hole 421 of the valve core 42, the water pressure is fixedly reduced after the liquid passes through the valve core 42, so that the pressure of the water supply channel 1 is fixedly reduced. The pressure regulation effect of the pressure relief hole 421 is more stable, and there is no attenuation of the spring force of the traditional one-way valve.

[0058] In some embodiments of the present invention, a water transport chamber 413 is provided on the valve body 41, connecting the input port 411 and the output port 412. A pressure relief hole 421 is located in the water transport chamber 413. Liquid enters the pressure relief valve 4 through the input port 411, is depressurized through the pressure relief hole 421 in the water transport chamber 413, and is discharged from the output port 412.

[0059] The valve core 42 is provided with a first water channel 422 that communicates with the inlet 411 of the valve body 41. A pressure relief hole 421 connects the first water channel 422 and the outlet 412 of the valve body 41. The valve core 42 at least partially extends into the water transport chamber 413. The first water channel 422 and the pressure relief hole 421 are located on the portion of the valve core 42 that extends into the water transport chamber 413. The water transport chamber 413 is used for the circulation of water within the valve body 41 and for the installation of the valve core 42.

[0060] The water transport chamber 413 passes through both ends of the valve body 41. One end of the water transport chamber 413 passing through the valve body 41 is the input port 411 of the valve body 41. The other end of the water transport chamber 413 passing through the valve body 41 is used to install the valve core 42. The output port 412 of the valve body 41 is located on one side of the water transport chamber 413. The valve body 41 has a simple structure and is easy to process, which is convenient for assembly with other components. The valve core 42 is installed on the valve body 41 through a threaded structure. The valve body 41 and the valve core 42 are simple to install, the valve core 42 is easy to replace, and the production and maintenance costs are low.

[0061] In some embodiments of the present invention, the pressure relief valve 4 includes a filter element 5 arranged corresponding to the input port 411 and a first sealing element 6 arranged between the valve body 41 and the valve core 42. The filter element 5 is used to filter impurities to prevent the pressure relief hole 421 of the valve core 42 from being blocked and causing the pressure relief component to fail. The setting of the first sealing element 6 prevents leakage of the pressure relief valve 4.

[0062] The valve core 42 and the valve body 41 are respectively provided with limiting steps 11 for positioning the two ends of the filter element 5, so as to realize the positioning and installation of the filter element 5 inside the valve body 41. The limiting step 11 of the valve core 42 is located on the outer side of the valve core 42, and the limiting step 11 of the valve body 41 is located on the inner side of the valve body 41. The filter element 5 is a filter screen and is barrel-shaped.

[0063] The first seal 6 is located between the inner wall of the valve body 41 and the side of the valve core 42. The first seal 6 is mounted on the valve core 42. There are more than two groups of first seals 6 and they are arranged along the axial direction of the valve core 42. More than two groups of first seals 6 are conducive to ensuring the sealing effect. The more than two groups of first seals 6 are located on both sides of the pressure relief hole 421 along the axial direction of the valve core 42, ensuring that the liquid only reaches the output port 412 of the valve body 41 from the pressure relief hole 421.

[0064] A first mounting groove 424 for setting a first seal 6 is provided on the valve core 42. The first seal 6 is a sealing ring. The first mounting groove 424 is located on the side of the valve body 41. The cooperation between the first seal 6 and the first mounting groove 424 realizes the installation of the first seal 6 on the valve core 42.

[0065] The valve core 42 is provided with a second water groove 425 for connecting the pressure relief hole 421 and the output port 412 of the valve body 41. A water passage area connected to the output port 412 of the valve body 41 is formed between the second water groove 425 and the inner wall of the valve body 41. The second water groove 425 is located on the side of the valve body 41.

[0066] In a further embodiment of the present invention, the pressure relief assembly includes a pressure relief valve connector 7, the output end of the pressure relief valve connector 7 is connected to the water supply line 1, and the input end of the pressure relief valve connector 7 is connected to the output port 412 of the pressure relief valve 4. The pressure relief valve connector 7 is used to connect the pressure relief valve 4 and the water supply line 1.

[0067] When the number of pressure relief components 2 is more than two, different pressure relief components 2 are connected in parallel to the water supply channel 1. By connecting more than two pressure relief components in parallel, when the pressure relief values ​​of different pressure relief components 2 to the water supply channel 1 are different, more than three pressure regulation modes can be realized, making the application of the water heating device more flexible. The output ports 412 of the pressure relief valves 4 of different pressure relief components 2 are respectively connected to the input ends of the pressure relief valve connector 7 so that different pressure relief components 2 are arranged in parallel. The pressure relief valve connector 7 can meet the connection requirements of more than two pressure relief components, which is beneficial to reducing the number of components of the pressure relief assembly. The apertures of the pressure relief holes 421 of the valve cores 42 of different pressure relief valves 4 are different or the same. When the apertures of the pressure relief holes 421 of the valve cores 42 of different pressure relief valves 4 are different, the pressure relief values ​​of different pressure relief components 2 to the water supply channel 1 are different.

[0068] The pressure relief valve connector 7 is respectively provided with an interface 71 corresponding to different pressure relief valve 4 output ports 412, and the interface 71 is used for docking and installation with the pressure relief valve 4 output port 412. A second sealing member 8 is provided between the pressure relief valve 4 output port 412 and the interface 71 of the pressure relief valve connector 7. The setting of the second sealing member 8 prevents leakage between the pressure relief valve connector 7 and the pressure relief valve 4.

[0069] A second mounting groove 4121 for arranging a second sealing member 8 is provided on the output port 412 of the pressure relief valve 4. The second mounting groove 4121 is located on the side of the output port 412 of the pressure relief valve 4. The second sealing member 8 is a sealing ring. The cooperation between the second mounting groove 4121 and the second sealing member 8 realizes the installation of the second sealing member 8 on the pressure relief valve 4.

[0070] The switch valve 3 is connected to the pressure relief valve 4 through a pipe 9. The pipe is a pressure-resistant pipe. The setting of the pressure-resistant pipe can withstand the water pressure when the water pump is running, ensuring the stable operation of the pressure relief assembly.

[0071] like Figure 4-10 As shown, the coffee machine includes a pressure relief assembly for regulating the water pressure of the water heating device.

[0072] The pressure relief assembly of the utility model is connected to the water supply line of the coffee machine. By opening the switch valve of the pressure relief assembly, the liquid in the water supply line passes through the switch valve and flows to the pressure relief valve through the switch valve to achieve pressure reduction processing, thereby reducing the pressure of the water supply line and realizing pressure regulation of the water supply line.

[0073] In some embodiments of the present invention, a control device is included. The control device is electrically connected to the switch valve 3 of the pressure relief assembly. The control device is used to control the opening and closing of the switch valve 3. The control device may include a display operation screen. Consumers can adjust the water supply pressure of the coffee machine by controlling the operation of the pressure relief assembly switch valve 3 through the display operation screen. Consumers do not need to have a good foundation in coffee making to easily adjust the water supply pressure of the coffee machine.

[0074] In addition, by customizing the valve core 42 with different pressure relief holes 421 diameters, various pressure adjustment and coordination applications can be achieved. The pressure relief assembly can also be used in mechanical coffee machines. By replacing the valve core 42 with different pressure relief holes 421 diameters, different pressure adjustment effects of the mechanical coffee machine can be achieved, thereby improving the playability of the mechanical coffee machine.

[0075] The water supply circuit 1 includes a water tank, a water pump assembly and a water heating mechanism connected in sequence. The input end of the pressure relief assembly 2 is connected between the water pump assembly and the water heating mechanism, and the output end of the pressure relief assembly 2 is connected to the water tank. The control device is electrically connected to the water pump assembly and the water heating mechanism. The control device is used to control the operation of the water pump assembly and the water heating mechanism.

[0076] The water heating mechanism includes a hot water assembly, which includes a first heating pot, hot water pipes respectively connected to the first heating pot, a funnel assembly, and a pressure relief tank. Solenoid valves are respectively provided between the first heating pot and the hot water pipes, between the first heating pot and the funnel assembly, and between the first heating pot and the pressure relief tank. The solenoid valve between the first heating pot and the funnel assembly is connected to the pressure relief tank. Pressure sensors are respectively provided on the first heating pot and at the input end of the funnel assembly.

[0077] The funnel assembly includes a funnel frame and a high-pressure funnel arranged on the funnel frame. The funnel assembly is used to output coffee, the hot water pipe is used to output hot water, and the pressure relief box is used to release pressure.

[0078] The water heating mechanism also includes a steam component, which includes a second heating pot and a steam pipe connected to the second heating pot. The second heating pot is connected to the first heating pot. Solenoid valves are respectively provided between the second heating pot and the steam pipe and between the first heating pot and the second heating pot. The solenoid valve between the second heating pot and the steam pipe is connected to the pressure relief box.

[0079] Flow meters are respectively provided between the water tank and the water pump assembly, and between the output end of the pressure relief assembly 2 and the water tank;

[0080] The water pump assembly includes a first water pump and a second water pump. The first water pump is connected between the water tank and the hot water assembly. A multi-way valve and a one-way valve connected in sequence are provided between the first water pump and the hot water assembly. In this embodiment, the multi-way valve is a four-way valve, which is respectively connected to two pressure relief assemblies. A reflux valve connected to the water tank is provided between the first water pump and the multi-way valve. The second water pump is connected between the water tank and the steam assembly.

[0081] The first water pump, the second water pump, the pressure sensor, the solenoid valve, and the flow meter are all electrically connected to the control device, which can be understood by those skilled in the art.

[0082] When the coffee machine is in coffee mode and the pressure relief assembly is not adjusted, Figure 5 As shown, water passes through the water tank, the first water pump, the multi-way valve, the one-way valve, the first heating pot in sequence, and is finally output from the funnel assembly;

[0083] When the coffee machine is in the coffee mode and one of the pressure relief components is adjusted, such as Figure 6 As shown, water passes through the water tank, the first water pump, the multi-way valve, the one-way valve, the first heating pot in sequence, and is finally output from the funnel assembly. The solenoid valve of one of the pressure relief assemblies is opened and connected to the multi-way valve. The water flows from the multi-way valve to the solenoid valve and pressure relief valve of the corresponding pressure relief assembly to reduce the pressure, and finally flows into the water tank;

[0084] When the coffee machine is in coffee mode and the two pressure relief components are adjusted, Figure 7As shown, water passes through the water tank, the first water pump, the multi-way valve, the one-way valve, the first heating pot in sequence, and is finally output from the funnel assembly. The solenoid valves of the two pressure relief assemblies are opened and connected to the multi-way valve. The water flows from the multi-way valve to the solenoid valve and pressure relief valve of the corresponding pressure relief assembly to reduce the pressure, and finally flows into the water tank;

[0085] When the coffee machine is in hot water, Figure 8 As shown, water passes through the water tank, the first water pump, the multi-way valve, the one-way valve, the first heating pot in sequence, and is finally output from the hot water pipe.

[0086] When the coffee machine is in normal steam mode, Figure 9 As shown, water passes through the water tank, the second water pump, and the second heating pot in sequence. The water is heated by a heating pot and is finally output from the steam pipe.

[0087] When the coffee machine is in the enhanced steam mode, Figure 10 As shown, water passes through the water tank, the first water pump, the multi-way valve, the one-way valve, the first heating pot, and the second heating pot in sequence. The water is heated by the two heating pots and is finally output from the steam pipe.

[0088] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. A pressure relief assembly for regulating the water line pressure of a water heating device, characterized in that: The pressure relief assembly comprises a pressure relief component (2) connected to a water supply channel (1) of a water heating device, the pressure relief component (2) comprising a switch valve (3) and a pressure relief valve (4) connected to the switch valve (3), the input end of the switch valve (3) being connected to the water supply channel (1), and the output end of the pressure relief valve (4) being connected to the water supply channel (1); When the water supply waterway (1) is in operation and the switch valve (3) is in an open state, part of the liquid in the water supply waterway (1) flows to the pressure relief valve (4) through the switch valve (3). After the pressure is reduced by the pressure relief valve (4), the liquid flows back into the water supply waterway (1) to reduce the pressure of the water supply waterway (1). When the switch valve (3) is in a closed state, the liquid in the water supply waterway (1) does not enter the pressure relief assembly (2).

2. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 1, characterized in that: The pressure relief assembly (2) is connected in parallel to the water supply channel (1), and the switch valve (3) is a solenoid valve.

3. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 1, characterized in that: The number of the pressure relief components (2) is more than two, and the pressure relief values ​​of different pressure relief components (2) on the water conveyance waterway (1) are different or the same, or the number of the pressure relief component (2) is one.

4. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 1, characterized in that: The water supply circuit (1) comprises a water tank, a water pump assembly and a water heating mechanism connected in sequence; The input end of the pressure relief component (2) is connected between the water pump component and the water heating mechanism, and the output end of the pressure relief component (2) is connected to the water tank.

5. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 1, characterized in that: The pressure relief valve (4) comprises a valve body (41) and a valve core (42) arranged on the valve body (41); the valve body (41) is provided with an input port (411) and an output port (412); the valve core (42) is provided with a pressure relief hole (421) communicating with the input port (411) and the output port (412); the output end of the switch valve (3) is connected to the input port (411) of the pressure relief valve (4); the output port (412) of the pressure relief valve (4) is connected to the water supply channel (1); liquid enters the input port (411) of the pressure relief valve (4), is discharged from the output port (412) after the pressure is reduced through the pressure relief hole (421), and is discharged from the output port (412).

6. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 5, characterized in that: The valve body (41) is provided with a water transport chamber (413) connected to the input port (411) and the output port (412). The pressure relief hole (421) is located in the water transport chamber (413). Liquid enters the pressure relief valve (4) from the input port (411), is depressurized through the pressure relief hole (421) in the water transport chamber (413), and is discharged from the output port (412). The valve core (42) is provided with a first water channel (422) communicating with the input port (411) of the valve body (41); the pressure relief hole (421) connects the first water channel (422) and the output port (412) of the valve body (41); the valve core (42) at least partially extends into the water transport cavity (413); the first water channel (422) and the pressure relief hole (421) are located on the portion of the valve core (42) extending into the water transport cavity (413); The water transport cavity (413) passes through both ends of the valve body (41), one end of the water transport cavity (413) passing through the valve body (41) serves as the input port (411) of the valve body (41), and the other end of the water transport cavity (413) passing through the valve body (41) is used for mounting the valve core (42), the output port (412) of the valve body (41) is located on one side of the water transport cavity (413), and the valve core (42) is mounted on the valve body (41) via a threaded structure.

7. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 6, characterized in that: The pressure relief valve (4) comprises a filter element (5) arranged corresponding to the input port (411) and a first sealing element (6) arranged between the valve body (41) and the valve core (42); The valve core (42) and the valve body (41) are respectively provided with limiting steps (11) for positioning both ends of the filter element (5); the limiting step (11) of the valve core (42) is located on the outer side of the valve core (42), and the limiting step (11) of the valve body (41) is located on the inner side of the valve body (41); the filter element (5) is a filter screen, and the filter element (5) is barrel-shaped; The first sealing member (6) is located between the inner wall of the valve body (41) and the side of the valve core (42), and the first sealing member (6) is sleeved on the valve core (42). The number of the first sealing members (6) is two or more groups and they are arranged along the axial direction of the valve core (42). The two or more groups of the first sealing members (6) are respectively located on both sides of the pressure relief hole (421) along the axial direction of the valve core (42); The valve core (42) is provided with a first mounting groove (424) for arranging a first sealing member (6), the first sealing member (6) being a sealing ring, and the first mounting groove (424) being located on a side of the valve body (41); The valve core (42) is provided with a second water passage groove (425) for connecting the pressure relief hole (421) and the output port (412) of the valve body (41). A water passage area connected to the output port (412) of the valve body (41) is formed between the second water passage groove (425) and the inner wall of the valve body (41). The second water passage groove (425) is located on the side of the valve body (41).

8. The pressure relief assembly for regulating the water line pressure of a water heating device according to claim 5, characterized in that: The pressure relief assembly includes a pressure relief valve connector (7), the output end of the pressure relief valve connector (7) is connected to the water supply channel (1), and the input end of the pressure relief valve connector (7) is connected to the output port (412) of the pressure relief valve (4); When the number of the pressure relief components (2) is more than two, different pressure relief components (2) are connected in parallel to the water supply channel (1), and the output ports (412) of the pressure relief valves (4) of the different pressure relief components (2) are respectively connected to the input ends of the pressure relief valve connectors (7) so that the different pressure relief components (2) are arranged in parallel, and the pressure relief holes (421) of the valve cores (42) of the different pressure relief valves (4) have different or the same apertures; The pressure relief valve connector (7) is provided with interfaces (71) corresponding to different pressure relief valve (4) output ports (412), and a second sealing member (8) is provided between the pressure relief valve (4) output port (412) and the interface (71) of the pressure relief valve connector (7); A second mounting groove (4121) for arranging a second sealing member (8) is provided on the output port (412) of the pressure relief valve (4), the second mounting groove (4121) being located on the side of the output port (412) of the pressure relief valve (4), and the second sealing member (8) being a sealing ring; The switch valve (3) is connected to the pressure relief valve (4) via a pipeline (9), and the pipeline is a pressure-resistant pipe.

9. A coffee machine, characterized in that: The invention comprises a pressure relief assembly for regulating the water circuit pressure of a water heating device as described in any one of claims 1 to 8.

10. The coffee machine according to claim 9, characterized in that It includes a control device electrically connected to the switch valve (3) of the pressure relief assembly; The water supply circuit (1) comprises a water tank, a water pump assembly and a water heating mechanism connected in sequence, the input end of the pressure relief assembly (2) is connected between the water pump assembly and the water heating mechanism, the output end of the pressure relief assembly (2) is connected to the water tank, and the control device is electrically connected to the water pump assembly and the water heating mechanism; The water heating mechanism includes a hot water assembly, which includes a first heating pot, hot water pipes respectively connected to the first heating pot, a funnel assembly, and a pressure relief tank. Solenoid valves are respectively provided between the first heating pot and the hot water pipes, between the first heating pot and the funnel assembly, and between the first heating pot and the pressure relief tank. The solenoid valve between the first heating pot and the funnel assembly is connected to the pressure relief tank. Pressure sensors are respectively provided on the first heating pot and at the input end of the funnel assembly. The water heating mechanism further includes a steam assembly, which includes a second heating pot and a steam pipe connected to the second heating pot, the second heating pot is connected to the first heating pot, and solenoid valves are respectively provided between the second heating pot and the steam pipe and between the first heating pot and the second heating pot, and the solenoid valve between the second heating pot and the steam pipe is connected to the pressure relief box; Flow meters are respectively provided between the water tank and the water pump assembly, and between the output end of the pressure relief assembly (2) and the water tank; The water pump assembly includes a first water pump and a second water pump. The first water pump is connected between the water tank and the hot water assembly. A multi-way valve and a one-way valve connected in sequence are provided between the first water pump and the hot water assembly. A reflux valve connected to the water tank is provided between the first water pump and the multi-way valve. The second water pump is connected between the water tank and the steam assembly.

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