A spring-loaded coffee machine with a dual water channel anti-rebound brewing head

Abstract

This utility model belongs to the technical field of coffee machine accessories. We propose a spring-loaded coffee machine dual-water-channel anti-rebound brewing head, including a brewing head body, a piston chamber, a hinge assembly, a piston assembly, and a dual-way valve assembly. A piston rod is installed in the piston chamber in the middle of the brewing head body. The top of the piston rod is connected to a pressure rod, and a spring is sleeved on the outside of the piston rod. A piston is located at the bottom of the piston rod, and the spring is located above the piston and moves synchronously with it. The bottom of the piston chamber is connected to the dual-way valve assembly, which has dual water channels: one channel is a pump-pressed water channel, and the other is a spring-pressed water channel. A one-way valve is installed at the spring pressure outlet, and a damping valve is installed below the one-way valve. The damping valve allows water to flow slowly out of the piston chamber, preventing the pressure rod from lifting instantly due to the piston's sudden downward movement. By using the principle of water pressure pushing the piston back into the piston chamber, the release speed of the damping spring is limited, preventing the spring from releasing instantly, and the pressure rod is slowly discharged with the water flow and rises smoothly.

Description

Technical Field

[0001] This utility model relates to the technical field of coffee machine accessories, specifically a spring-loaded coffee machine dual-water-channel anti-rebound brewing head. Background Technology

[0002] The core working component of a spring-loaded coffee machine is the brewing head, but existing spring-loaded coffee machine brewing heads have operational safety issues during long-term use;

[0003] Existing spring-loaded coffee machine brewing heads do not have an anti-rebound design. When the spring is released, the piston moves down too quickly. The compressed spring will release its elastic potential energy instantly under high pressure, pushing the piston down rapidly and the pressure rod up abruptly, posing a dual risk of equipment damage and personal injury.

[0004] Based on the aforementioned practical shortcomings, we proposed a spring-loaded coffee machine dual-water-channel anti-rebound brewing head. Utility Model Content

[0005] The purpose of this invention is to provide a spring-loaded coffee machine with a dual-water-channel anti-rebound brewing head to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A spring-loaded coffee machine dual-water-channel anti-rebound brewing head includes a brewing head body; a dual-water-channel is installed on the outside of the brewing head body, the dual-water-channel includes two water inlets, an upper water inlet for spring-pressed water passage and a lower water inlet for pump-pressed water passage, and a one-way valve is installed in each water inlet;

[0008] A piston chamber is provided in the inner cavity of the main body of the brewing head. A two-way valve group is provided at the bottom of the piston chamber. A one-way valve for water outlet is installed in the two-way valve group. A damping valve for water outlet is installed at the bottom of the one-way valve for water outlet. The spring pressure water circuit is connected to the piston chamber. The pump pressure water circuit is symmetrically arranged on both sides of the two-way valve group and is connected to the two-way valve group.

[0009] A piston rod is installed in the middle of the main body of the brewing head. A spring is sleeved on the outside of the piston rod. A piston is set at the bottom end of the piston rod. The spring is located above the piston and moves synchronously with the piston. A sealing ring is set on the side wall of the piston chamber.

[0010] Preferably, a pressure rod is provided on the top of the brewing head body, a hinge assembly is installed between the top of the brewing head body and the pressure rod, and the top of the piston rod is connected to the pressure rod;

[0011] When the pressure rod is pulled down, it drives the hinge assembly to move in tandem. The piston rod and piston move upward synchronously and compress the spring. The outlet check valve at the bottom of the piston chamber closes, and the inlet check valve opens when the piston moves upward. Water flows into the piston chamber through the negative pressure in the piston chamber and the 2 Bar water pressure in the boiler.

[0012] Preferably, an outlet damping valve is installed at the bottom of the outlet check valve, so that the water in the piston chamber cannot be discharged instantly through the outlet damping valve. The water pressure on the piston restricts the release of the piston rod and spring, and limits the speed of the pressure rod's rebound. Only after the water has completely passed through the outlet damping valve will the spring and pressure rod fully return to their initial state.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This solution employs a dual-water-path design, with separate spring-pressure and pump-pressure water paths, enabling dual-use functionality from a single end. Operationally, it caters to different user needs: those with less strength can choose the less strenuous pump-pressure mode for easy operation; while users who prefer a mechanical feel and possess greater strength can enjoy a more suitable user experience through the spring-pressure mode.

[0015] A two-way valve assembly is connected to the bottom of the piston chamber. The valve assembly has two water passages: one for pump pressure and one for spring pressure, which can be selected as needed. A one-way valve is installed at the spring pressure outlet, and below the one-way valve is an outlet damping valve. The outlet damping valve allows water to flow out of the piston chamber slowly, preventing the piston from suddenly dropping and causing the pressure rod to rise instantly. By using the principle of water pressure pushing the piston back into place within the piston chamber, the release speed of the piston rod spring is limited, preventing the piston rod spring from releasing instantly. The pressure rod is then slowly discharged with the water flow and rises smoothly, avoiding the risk of rebound caused by a sudden drop in the piston.

[0016] A saturation chamber is set between the piston chamber and the brew head body. The saturation chamber ensures that the water flow remains in a stable saturated state throughout the brewing process. Steam is introduced into the saturation chamber through the coffee machine's water supply system, maintaining a balance between liquid and steam within the enclosed space. The vaporization rate of liquid molecules is the same as that of steam molecules, resulting in a more stable temperature inside the brew head. Attached Figure Description

[0017] Figure 1 This is the front view of the present utility model;

[0018] Figure 2 This is a front view of the present utility model;

[0019] Figure 3 This is a rear view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of section A.

[0022] In the diagram: 1. Cooking head body, 2. Cooking head bayonet, 3. Pressure rod, 4. Hinge assembly, 5. Dual water passage, 6. Spring, 7. Piston rod, 8. Piston, 9. Inlet, 91. Spring-pressed water passage, 92. Pump-pressed water passage, 10. Dual-way valve assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example:

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A spring-loaded coffee machine dual-water-channel anti-rebound brewing head, the brewing head body 1, as the basic frame of the entire brewing head, has excellent mechanical strength and can withstand the stress caused by the pressure of the spring 6, water pressure and temperature changes during long-term use. It can also ensure the safety of contact with food and meet national food safety standards.

[0028] The dual water channel 5 is the key structure for realizing the dual-use function of this utility model. The dual water channel 5 includes two independent water inlets 9, one above the other, which correspond to different working modes and are the core of realizing water channel switching. The upper water inlet 9 is a spring-pressure water channel 91, which is connected to the water supply system of the coffee machine, and the other end is directly connected to the piston chamber inside the brewing head body 1. When the piston 8 moves upward to form a negative pressure, the pipe diameter of the spring-pressure water channel 91 can quickly and stably supply water to the piston chamber, meeting the brewing requirements of the spring pressure mode.

[0029] The lower water inlet 9 is a pump-pressed water circuit 92, which is also connected to the water supply system. However, unlike the spring-pressed water circuit 91, the pump-pressed water circuit 92 has an external pump-pressed device added to the connection path, and its ends are symmetrically arranged on both sides of the double-way valve group 10 and directly connected to the double-way valve group 10. The design focus of the pump-pressed water circuit 92 is to cooperate with the external pump-pressed system to provide additional power for the water flow and reduce the operating intensity. In pump-pressed mode, the water flow can enter the double-way valve group 10 with a stable pressure, thereby achieving efficient and labor-saving brewing operation.

[0030] The inlet check valve is an important component of the dual water passage 5. It only opens under specific pressure conditions, effectively preventing backflow of water when not in operation and avoiding water contamination and malfunction. In spring pressure mode, when piston 8 moves upward, creating negative pressure in the piston chamber, and the 2 Bar water pressure inside the boiler acts on the inlet check valve, the valve core is opened, and water flows into the piston chamber through the spring pressure water passage 91. Conversely, when piston 8 moves downward, the water pressure in the piston chamber increases, and the inlet check valve core closes under reverse pressure, preventing backflow. The inlet check valve of the pump pressure water passage 92 operates on a similar principle, opening only when the external pump pressure system is started and the water pressure reaches the set value, ensuring that the two water passages operate independently without interference.

[0031] The piston chamber within the main body 1 of the brewing head is a crucial space for water intake, compression, and release. The bottom of the piston chamber is tightly connected to the two-way valve assembly 10, sealed together by a sealing ring to prevent water leakage. The two-way valve assembly 10 is the core component connecting the piston chamber to the outside. It contains an outlet check valve and an outlet damping valve, which work together to control the water output and release speed. Their opening pressure matches the working pressure within the piston chamber. When the piston 8 moves downwards, the water pressure in the piston chamber rises to a set value, opening the outlet check valve core and allowing high-pressure water to enter the subsequent channel of the two-way valve assembly 10. Conversely, when the piston 8 moves upwards, creating negative pressure within the piston chamber, the outlet check valve core closes under its own weight and spring force, preventing external air from entering the piston chamber and ensuring the smooth operation of the negative pressure water intake process.

[0032] The outlet damping valve, installed at the bottom of the outlet check valve, is the core component for achieving the anti-rebound function. This damping valve employs a combination of a throttling orifice and a valve core design. By controlling the orifice diameter and the valve core's stroke, it limits the water flow rate. When high-pressure water enters the outlet damping valve through the outlet check valve, the water must overcome the internal resistance of the damping valve to flow out slowly. This process prevents the water in the piston chamber from being discharged instantly, thus creating a back pressure within the chamber. This back pressure generates an upward counterforce on the downward-moving piston 8, offsetting some of the elastic potential energy of the spring 6, slowing the downward movement of the piston 8, and thus allowing the spring 6 to release slowly, preventing the pressure rod 3 from rebounding instantly. The damping coefficient of the outlet damping valve has undergone extensive experimental adjustments to ensure smooth water discharge and slow spring release under different working pressures, balancing brewing performance and safety.

[0033] In addition, the sealing ring on the side wall of the piston chamber can fit tightly against the inner wall of the piston chamber and the outer wall of the piston 8, maintaining good sealing performance during the up-and-down movement of the piston 8, preventing water from leaking from the gap between the piston and the chamber wall, ensuring that the pressure in the piston chamber can be effectively transmitted, and ensuring the stability of the brewing pressure.

[0034] The outer side of the brewing head body 1 has a special installation interface for fixing the dual water passage 5; the piston chamber provides a stable space for the reciprocating motion of the piston 8; the piston chamber is equipped with a piston rod 7 and a spring 6, and a connection structure matching the pressure rod 3 and hinge assembly 4 is designed on the top of the brewing head body 1; one end of the pressure rod 3 is connected to the top of the brewing head body 1 through the hinge assembly 4, and the other end is a free end for the user to hold and operate;

[0035] The hinge assembly 4, as a rotating component connecting the pressure rod 3 and the brewing head body 1, ensures that the pressure rod 3 rotates flexibly and smoothly without jamming. When the user pulls down the pressure rod 3, the hinge assembly 4 drives the piston rod 7 to move upward synchronously, thereby realizing the upward movement of the piston 8 and the compression of the spring 6; when the user releases the pressure rod 3, under the action of the elastic potential energy of the spring 6, the piston 8 moves downward, and the pressure rod 3 is reset through the piston rod 7 and the hinge assembly 4. The connection strength of the hinge assembly 4 has been rigorously tested and can withstand long-term repeated operating forces, ensuring the safety and reliability of the entire operation process.

[0036] The piston rod 7, installed in the middle of the brewing head body 1, is a key transmission component connecting the pressure rod 3 and the piston 8, capable of withstanding long-term repeated tensile and compressive stresses. The top of the piston rod 7 is connected to the pressure rod 3 via a pin, while the bottom is threaded to the piston 8 and secured with a lock nut to ensure a firm connection and prevent relative displacement during movement. A spring 6, made of high-temperature resistant silicon-manganese spring steel, is sleeved on the outside of the piston rod 7, providing stable and sufficient elastic potential energy for the piston 8 to return to its original position. The spring 6 is located above the piston 8; when the piston 8 moves upward, the spring 6 is compressed, storing elastic potential energy; when the piston 8 moves downward, the spring 6 releases its elastic potential energy, pushing the piston 8 to move.

[0037] The up-and-down movement of piston 8 directly changes the volume of the piston chamber, thereby realizing the intake and release of water: when piston 8 moves upward, the volume of the piston chamber increases, creating negative pressure and drawing in water; when piston 8 moves downward, the volume of the piston chamber decreases, the water pressure increases, and the water is released. Since spring 6 moves synchronously with piston 8, the change in the elastic potential energy of spring 6 directly affects the movement speed and pressure of piston 8. Therefore, the performance parameters of spring 6 are crucial to the stability of the entire brewing process.

[0038] A saturation chamber is located between the piston chamber and the brew head body. This saturation chamber ensures that the water flow remains stable and saturated throughout the brewing process. Steam is introduced into the saturation chamber via the coffee machine's water supply system. Within this enclosed space, the liquid and steam are in equilibrium, with liquid molecules vaporizing at the same rate as steam molecules liquefying, resulting in a more stable temperature within the brew head. Even when the temperature within the piston chamber fluctuates, the saturation chamber maintains a stable saturated water flow throughout the brewing process, reducing the risk of under-extraction due to temperature instability.

[0039] Working principle:

[0040] This solution adopts a dual water channel. The upper water inlet 9 is a spring-pressed water channel 91, and the lower water inlet 9 is a pump-pressed water channel 92. Both water channels are equipped with inlet check valves, which can be switched as needed. People with less strength can use the pump pressure operation, while people who like the mechanical feel and have more strength can use the spring pressure operation, thus solving the problem of dual use at one end.

[0041] It adopts a dual water channel mechanism: the upper water inlet 9 is a spring-pressure water channel, and the lower water inlet 9 is a pump-pressure water channel. The two water channels are independent of each other, and each water inlet 9 is equipped with a one-way valve. It can be flexibly switched according to the user's needs. People with less strength can use the pump pressure to assist operation without having to apply a lot of force manually; people who like the mechanical feel and have more strength can use the spring pressure to operate directly and fully experience the feeling of manual control. It fundamentally solves the problem of traditional brewing heads having only one function and being unable to adapt to the usage habits of different people, truly realizing dual use in one head.

[0042] The operation of the pump-pressure water circuit 92 channel is more convenient. The lower water inlet 9 relies on the external pump pressure to provide power. When the pump pressure system is started, water can enter the double-way valve group 10 through the pump-pressure water circuit 92, and then complete the rinsing through the subsequent channels, which greatly reduces the intensity of operation and is especially suitable for people with less strength or who pursue convenient operation.

[0043] The spring-loaded water circuit 91 works in conjunction with the pressure rod 3 and the hinge assembly 4: When the user pulls down the pressure rod 3, the hinge assembly 4 will drive the piston rod 7 in the middle of the cooking head body 1 to move upward synchronously. The spring 6 sleeved on the outside of the piston rod 7 is compressed as the piston 8 moves upward. At this time, the volume of the piston cavity increases and a negative pressure is formed. Combined with the 2 Bar stable water pressure provided by the boiler, the inlet check valve of the spring-loaded water circuit 91 opens, and water flows smoothly into the piston cavity to complete water storage. After releasing the pressure rod 3, the compressed spring 6 releases its elastic potential energy and pushes the piston 8 to slide downward in the piston cavity. The volume of the piston cavity decreases and the water pressure increases. The upper inlet check valve closes, and the high-pressure water opens the outlet check valve in the double-way valve group 10 at the bottom of the piston cavity, thereby completing the cooking and spraying action.

[0044] To avoid safety hazards during spring pressure operation, this solution features a specially installed outlet damping valve at the bottom of the outlet check valve of the dual-way valve assembly 10. Traditional brewing heads, lacking a slow-release structure, cause the piston 8 to move downwards rapidly and the pressure rod 3 to rebound violently, posing a risk of equipment damage and personal injury. The outlet damping valve, however, limits the discharge speed of water in the piston chamber, allowing the water to flow out slowly. At this time, the water reserved in the piston chamber generates an upward counterforce on the downward-moving piston 8, offsetting part of the thrust of the spring 6, preventing the spring 6 from releasing energy instantly. The pressure rod 3 rises smoothly with the water flow until the water is completely discharged, at which point it returns to its initial state. This retains the mechanical feel of spring pressure operation while also ensuring safety, further enhancing the practical value of the dual water channel.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring-loaded coffee maker with dual water channels and anti-rebound brewing head, comprising a brewing head body (1), characterized in that: The main body (1) of the brewing head is equipped with a double water channel (5) on the outside. The double water channel (5) includes two water inlets (9) at the top and bottom. The upper water inlet (9) is a spring-pressed water channel (91); the lower water inlet (9) is a pump-pressed water channel (92). Each water inlet (9) is equipped with a one-way valve. A piston chamber is provided in the inner cavity of the main body (1) of the brewing head. A double-way valve group (10) is provided at the bottom of the piston chamber. A water outlet check valve is installed in the double-way valve group (10). A water outlet damping valve is installed at the bottom of the water outlet check valve. A spring pressure water circuit (91) is connected to the piston chamber. A pump pressure water circuit (92) is symmetrically arranged on both sides of the double-way valve group (10). The pump pressure water circuit (92) is connected to the double-way valve group (10). A piston rod (7) is installed in the middle of the main body (1) of the brewing head. A spring (6) is sleeved on the outside of the piston rod (7). A piston (8) is provided at the bottom end of the piston rod (7). The spring (6) is located above the piston (8) and moves synchronously with the piston (8). A sealing ring is provided on the side wall of the piston chamber.

2. A spring-powered coffee maker dual water path channel bounce-back prevention brewing head according to claim 1, characterized in that: A pressure rod (3) is provided on the top of the brewing head body (1), and a hinge assembly (4) is installed between the top of the brewing head body (1) and the pressure rod (3). The top of the piston rod (7) is connected to the pressure rod (3). The pressure rod (3) pulls down and drives the hinge assembly (4) to move in tandem. The piston rod (7) and piston (8) move upward synchronously and compress the spring (6). The outlet check valve set at the bottom of the piston chamber closes. When moving upward, the inlet check valve opens. Water flows into the piston chamber through the negative pressure in the piston chamber and the 2 Bar water pressure in the boiler.

3. A spring powered coffee maker dual water path channel bounce back prevention brew head according to claim 1, wherein: A water outlet damping valve is installed at the bottom of the water outlet check valve. The water in the piston chamber cannot be discharged instantly through the water outlet damping valve. The force of water pressure on the piston (8) restricts the release of the piston rod (7) and the spring (6), and limits the rebound speed of the pressure rod (3). Only after the water has completely passed through the water outlet damping valve will the spring (6) and the pressure rod (3) fully return to their initial state.

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