A coffee machine heat cycle device

Abstract

The utility model relates to a coffee machine heat cycle device, including boiler, brewing head, the boiler inner chamber is equipped with heating assembly, and the brewing head includes brewing head body, water storage chamber, control chamber, extraction assembly, control valve assembly, discharge valve assembly, water storage chamber upper portion is connected with the boiler inner chamber through the water diversion copper pipe, its characterized by: the lower part of boiler is connected with the lower part of water storage chamber through the backwater copper pipe, and the water diversion copper pipe, water storage chamber, backwater copper pipe, boiler inner chamber constitute the circulating heating device. Make the boiler inner chamber up and down water temperature consistent, realize to the brewing head sufficient heating, guarantee coffee machine when output coffee liquid temperature persistent stable, satisfy coffee machine short time multiple extraction requirement, avoided prior art need to set up electric heating module in brewing head and carry out secondary heating, reduce the whole machine power and product cost.

Description

Technical Field

[0001] This utility model relates to a coffee machine heating device, and more particularly to a coffee machine heat circulation device. Background Technology

[0002] Coffee machine heating devices typically use electric boilers. The upper part of the boiler is connected to the brew head cavity via copper pipes. When the water inside the boiler is heated, thermal stratification occurs. The hot water expands in volume, decreases in density, and moves towards the top of the boiler, creating a thermosiphon effect. The hot water then flows through the copper pipes into the brew head, providing heat for coffee extraction. However, this thermal stratification causes uneven water temperatures at the top and bottom of the boiler, resulting in excessively low temperatures at the bottom, which cannot meet the requirements of multiple extractions in a short period. Therefore, existing coffee machines use an electric heating module in the brew head for secondary heating to meet the requirements of multiple extractions in a short time. The main disadvantage of this method is increased overall machine power and product cost. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a heat circulation device for coffee machines that utilizes a thermal circulation system to ensure a consistent water temperature within the boiler cavity, thereby meeting the requirements for multiple extractions in a short period of time and reducing overall machine power and product costs.

[0004] The technical solution for realizing this utility model is as follows: A coffee machine heat circulation device includes a boiler and a brewing head. The boiler has a heating element inside and a water outlet at the top that communicates with the inner cavity. The brewing head includes a brewing head body, a water storage chamber, a control chamber, an extraction element, a control valve assembly, and a discharge valve assembly. The water outlet and the upper part of the water storage chamber are connected by a water inlet copper pipe. A water inlet channel connecting the control chamber and the extraction element is provided inside the brewing head body. The device is characterized by having a water return port at the bottom of the boiler, which is connected to the lower part of the water storage chamber by a water return copper pipe. The water outlet, water inlet copper pipe, water storage chamber, water return copper pipe, water return port, and boiler inner cavity constitute a circulating heating device.

[0005] In a preferred embodiment, the control valve assembly consists of a valve cap, a valve core, a spring, and a valve seat. The valve cap is fixedly installed on the inner wall of the water storage chamber and has a spring cavity inside. The valve seat is located at the bottom of the water storage chamber, with its upper end of the central hole communicating with the water storage chamber and its lower end communicating with the control chamber. The outer circumference of the valve core is movably fitted with the inner wall of the spring cavity, and a top rod extending into the control chamber is provided at the center of the lower end face. The spring is installed in the spring cavity between the upper end face of the valve core and the valve cap.

[0006] A preferred embodiment is that the discharge valve assembly includes a discharge valve cover, a discharge valve core, a discharge valve seat, and a discharge spring. The discharge valve seat is located at the lower part of the brewing head body, and its central hole communicates with the control chamber. The discharge valve cover has a discharge channel at its center, and its upper end is threadedly installed at the lower part of the brewing head body. The upper end face of the discharge valve core has a sealing surface that cooperates with the discharge valve seat. The upper end of the discharge push rod at the center of the upper end face extends into the inner cavity of the control chamber. The discharge spring is installed between the lower end face of the discharge valve core and the discharge valve cover.

[0007] A preferred embodiment is to install a control valve and discharge valve switching device in the control room. The switching device includes a lever and a control cam. The lever extends into the cavity of the control room, and its centerline is perpendicular to the centerlines of the valve core and the discharge valve core. It is located at the midpoint between the lower end face of the push rod and the upper end face of the discharge push rod. The control cam is located on one side of the lever and cooperates with the lower end face of the push rod and the upper end face of the discharge push rod to form the control valve switch and the discharge valve switch, respectively.

[0008] The advantages of this utility model compared with the prior art are as follows: The boiler cavity is composed of a circulating heating device consisting of a water outlet, a copper water inlet pipe, a water storage chamber, a copper water return pipe, and a water return outlet, which makes the water temperature in the upper and lower parts of the boiler cavity consistent, so as to fully heat the brewing head and ensure that the coffee machine outputs coffee liquid at a stable temperature for a long time, which meets the requirements of the coffee machine to extract coffee multiple times in a short period of time. This avoids the need for the existing technology to set up an electric heating module in the brewing head for secondary heating, thus reducing the overall power and product cost. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram: 1 Boiler, 2 Inlet copper pipe, 3 Cooking head body, 4 Return copper pipe, 5 Heating component, 6 Outlet, 7 Water storage chamber, 8 Valve cap, 9 Spring, 10 Valve core, 11 Control chamber, 12 Inlet water channel, 13 Extraction component, 14 Control cam, 15 Operating lever, 16 Discharge valve core, 17 Discharge spring, 18 Discharge valve cover, 19 Return water port, 20 Limit block. Detailed Implementation

[0011] like Figure 1The coffee machine heat circulation device shown includes a boiler 1 and a brewing head. The boiler 1 has a heating element 5 inside its cavity, which uses a coiled copper heating wire. The upper end of the boiler 1 has a water outlet 6 connecting to the inner cavity. The brewing head includes a brewing head body 3, a water storage chamber 7, a control chamber 11, an extraction component 13, a control valve assembly, and a drain valve assembly. The water outlet 6 and the upper part of the water storage chamber 7 are connected by a copper water pipe 2, introducing hot water from the boiler 1 into the water storage chamber 7. The brewing head body 3 has a connection between the control chamber 11 and the extraction component. The water inlet channel 12 of component 13 presses water into the extraction component 13 to extract coffee powder. Its characteristic is that a return water inlet 19 is provided at the lower part of the boiler 1. The return water inlet 19 is interconnected with the lower part of the water storage chamber 7 via a return water copper pipe 4. The water outlet 6, the water inlet copper pipe 2, the water storage chamber 7, the return water copper pipe 4, the return water inlet 19, and the inner cavity of the boiler 1 form a circulating heating device, ensuring uniform heating of the water temperature within the boiler 1. This meets the requirements of multiple extractions in a short time for the coffee machine, reducing the power consumption and product cost. The brewing head body 3 is made of copper material with high thermal conductivity, improving the overall heating performance of the brewing head by water temperature.

[0012] The control valve assembly consists of a valve cap 8, a valve core 10, a spring 9, and a valve seat. The valve cap 8 is fixedly installed on the inner wall of the water storage chamber 7 by radial connecting ribs and has a spring cavity inside. The valve seat is located at the bottom of the water storage chamber 7, with its upper end of the central hole communicating with the water storage chamber 7 and its lower end communicating with the control chamber 11. The outer circumference of the valve core 10 is movably engaged with the inner wall of the spring cavity, allowing the valve core 10 to move axially within the inner wall of the spring cavity. A push rod is provided at the center of the lower end face, extending into the control chamber 11. The spring 9 is installed in the spring cavity between the upper end face of the valve core 10 and the valve cap 8. Its elastic force presses the valve core 10 downward to seal it with the valve seat. When the valve core 10 moves upward, the control valve opens, and the hot water in the water storage chamber 7 enters the control chamber 11 through the central hole of the valve seat, and then is pressed into the extraction assembly 13 through the water inlet channel 12 to extract coffee. The valve cap 8 and the valve core 10 are made of copper material with high transmission performance.

[0013] The discharge valve assembly includes a discharge valve cover 18, a discharge valve core 16, a discharge valve seat, and a discharge spring 17. The discharge valve seat is located at the lower part of the brewing head body 3, and its central hole communicates with the control chamber 11. The discharge valve cover has a discharge channel at its center, and its upper end is threadedly installed at the lower part of the brewing head body 3. The upper end face of the discharge valve core 16 has a sealing surface that cooperates with the discharge valve seat. The upper end of the discharge push rod at the center of the upper end face extends into the inner cavity of the control chamber 11. The discharge spring 17 is installed between the lower end face of the discharge valve core 16 and the discharge valve cover 18. The elastic force of the discharge spring 17 pushes the discharge valve core 16 to seal with the discharge valve seat. After each coffee extraction, the discharge valve core 16 is pushed to open the discharge valve to release the low-temperature water accumulated in the control chamber 11, preventing low-temperature water from flowing into the extraction assembly 13 and affecting the quality of the extracted coffee.

[0014] An interlocking switch device for the control valve and the discharge valve is installed in the control chamber 11. The interlocking switch device includes a lever 15 and a control cam 14. The lever 15 extends into the inner cavity of the control chamber 11, and its center line is perpendicular to the center lines of the valve core 10 and the discharge valve core 16. It is located at the midpoint between the lower end face of the push rod and the upper end face of the discharge push rod. The control cam 14 is located on one side of the lever 15 and cooperates with the lower end face of the push rod and the upper end face of the discharge push rod to form the control valve switch and the discharge valve switch, respectively. A limit block 20 is provided on the other side of the lever 15. When the lever 15 rotates counterclockwise, it drives the control cam 14 to push up the valve core 10, opening the control valve and closing the discharge valve. Hot water in the water storage chamber 7 enters the extraction component 13 through the control chamber 11 and the water inlet channel 12 to extract coffee. When the lever 15 rotates clockwise, it drives the control cam 14 to press down the discharge valve core 16, opening the discharge valve and closing the control valve, thus draining the water accumulated in the control chamber 11.

Claims

1. A coffee machine heat circulation device, comprising a boiler (1) and a brewing head, wherein the boiler (1) has a heating component (5) in its inner cavity, and the brewing head includes a brewing head body (3), a water storage chamber (7), a control chamber (11), an extraction component (13), a control valve assembly, and a discharge valve assembly, wherein the upper part of the water storage chamber (7) is connected to the inner cavity of the boiler (1) through a copper water pipe (2), and a water channel (12) connecting the control chamber (11) and the extraction component (13) is provided in the brewing head body (3); characterized in that: The lower part of the boiler (1) is connected to the lower part of the water storage chamber (7) through the return water copper pipe (4). The water inlet copper pipe (2), the water storage chamber (7), the return water copper pipe (4) and the inner cavity of the boiler (1) form a circulating heating device.

2. The coffee machine heat circulation device according to claim 1, characterized in that: The control valve assembly consists of a valve cap (8), a valve core (10), a spring (9), and a valve seat. The valve cap (8) is fixedly installed on the inner wall of the water storage chamber (7) and has a spring cavity inside. The valve seat is located at the bottom of the water storage chamber (7), with its upper end connected to the water storage chamber (7) and its lower end connected to the control chamber (11). The outer circumference of the valve core (10) is movably fitted with the inner wall of the spring cavity. A top rod extending into the control chamber (11) is provided at the center of the lower end face. The spring (9) is installed in the spring cavity between the upper end face of the valve core (10) and the valve cap (8).

3. The coffee machine heat circulation device according to claim 1 or 2, characterized in that: The discharge valve assembly includes a discharge valve cover (18), a discharge valve core (16), a discharge valve seat, and a discharge spring (17). The discharge valve seat is located at the lower part of the brewing head body (3), and its central hole is connected to the control chamber (11). The discharge valve cover (18) has a discharge channel at its center, and its upper end is threadedly installed at the lower part of the brewing head body (3). The upper end face of the discharge valve core (16) has a sealing surface that cooperates with the discharge valve seat. The upper end of the discharge top rod at the center of the upper end face extends into the inner cavity of the control chamber (11). The discharge spring (17) is installed between the lower end face of the discharge valve core (16) and the discharge valve cover (18).

4. The coffee machine heat circulation device according to claim 3, characterized in that: An interlocking switch device for the control valve and the discharge valve is installed in the control room (11). The interlocking switch device includes a control lever (15) and a control cam (14). The control lever (15) extends into the inner cavity of the control room (11). Its center line is perpendicular to the center line of the valve core (10) and the discharge valve core (16). It is located at the middle position between the lower end face of the push rod and the upper end face of the discharge push rod. The control cam (14) is set on one side of the control lever (15) and cooperates with the lower end face of the push rod and the upper end face of the discharge push rod to form the control valve switch and the discharge valve switch, respectively.

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