Double-waterway-channel springback-preventing brewing and boiling head of spring coffee machine

Abstract

The invention belongs to the technical field of coffee machine accessories, and particularly relates to a spring coffee machine double-waterway-channel anti-springback brewing head which comprises a brewing head body, a piston cavity, a hinge assembly, a piston assembly and a two-way valve set. A piston rod is installed in a piston cavity in the middle of the brewing head body, the top of the piston rod is connected with the pressing rod, the piston rod is sleeved with a spring, and a piston is arranged at the bottom end of the piston rod. The bottom of the piston cavity is connected with a two-way valve set, double water way channels are arranged in the valve set, one channel is a pump pressure water way channel, and the other channel is a spring pressure water way channel. A spring pressure water outlet is provided with a water outlet one-way valve, a water outlet damping valve is arranged below the one-way valve and enables water in a piston cavity to flow out slowly, and the situation that a piston moves downwards instantly and consequently a pressing rod is lifted instantly is avoided. The releasing speed of the damping spring is limited through the principle that water pressure in the piston cavity reversely pushes the piston, the spring cannot be released instantly, and the pressing rod is slowly discharged along with water flow and stably lifted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee machine accessories, in particular to a spring coffee machine double water path channel anti-rebound brewing head. BACKGROUND

[0002] The core working part of the spring coffee machine is the brewing head, but the existing spring coffee machine brewing head has the problem of operation safety in long-term use.

[0003] The existing spring coffee machine brewing head is not designed to prevent rebound, and when the spring is released, the piston moves downward too fast, the compressed spring will release the elastic potential energy instantaneously under high pressure, pushing the piston to move downward quickly and the pressure rod to lift up suddenly, which has the double risks of equipment damage and personal injury.

[0004] Based on the above practical defects, the present application provides a spring coffee machine double water path channel anti-rebound brewing head. SUMMARY

[0005] The present application aims to provide a spring coffee machine double water path channel anti-rebound brewing head to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A spring coffee machine double water path channel anti-rebound brewing head, comprising a brewing head main body, a double water path channel is installed on the outside of the brewing head main body, the double water path channel comprises two upper and lower water inlets, the upper water inlet is a spring water path, and the lower water inlet is a pump water path, and a water inlet check valve is installed in each water inlet.

[0008] A piston cavity is formed in the inner cavity of the brewing head main body, a double check valve group is arranged at the bottom of the piston cavity, a water outlet check valve is installed in the double check valve group, and a water outlet damping valve is installed at the bottom of the water outlet check valve; the spring water path is connected to the piston cavity, the pump water path is symmetrically arranged on both sides of the double check valve group, and the pump water path is connected to the double check valve group.

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

[0010] Preferably, a pressure rod is arranged at the top of the brewing head main body, a hinge assembly is installed between the top of the brewing head main body and the pressure rod, and the top of the piston rod is connected to the pressure rod.

[0011] The pressure rod pulls down to drive the linkage of the hinge assembly, the piston rod and the piston move upward synchronously and compress the spring, the water outlet one-way valve arranged at the bottom of the piston cavity is closed, the water inlet one-way valve is opened when moving upward, and the water flows into the piston cavity through the negative pressure in the piston cavity and the water pressure of 2 Bar in the boiler.

[0012] Preferably, the water outlet one-way valve is arranged at the bottom of the water outlet damping valve, the water in the piston cavity cannot be discharged instantaneously through the water outlet damping valve, the acting force of the water pressure on the piston limits the release of the piston rod and the spring, and limits the rebound speed of the pressure rod; when the water completely passes through the water outlet damping valve, the spring and the pressure rod will be completely restored to the initial state.

[0013] Preferably, the piston cavity and the brewing head main body are arranged with a saturation cavity, and the closed space of the saturation cavity is used to realize the saturation balance of liquid and steam, which is beneficial to maintaining the stability of the internal temperature.

[0014] Preferably, the sealing ring arranged on the side wall of the piston cavity can tightly fit the inner wall of the piston cavity and the outer wall of the piston, and always maintains good sealing performance during the upward and downward movement of the piston, prevents water flow from leaking between the piston and the cavity wall, ensures that the pressure in the piston cavity can be effectively transmitted, and guarantees the stability of the brewing pressure.

[0015] Preferably, the upward and downward movement of the piston directly changes the volume of the piston cavity, so as to realize the suction and release of water flow: when the piston moves upward, the volume of the piston cavity increases, negative pressure is formed, and water flow is sucked; when the piston moves downward, the volume of the piston cavity decreases, and the water pressure rises, and water flow is released.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] The present scheme adopts a double water path design, and respectively configures spring water pressure path and pump water pressure path channels to realize one-head dual-use function. On the operation, the needs of different groups of people are considered: those with less strength can choose the pump pressure mode to easily complete the operation; those who prefer mechanical texture and have more strength can obtain more suitable use experience through the spring pressure mode.

[0018] A double-way valve group is connected at the bottom of the piston cavity, a double water path channel is arranged in the valve group, one channel is a pump pressure channel, and the other channel is a spring pressure channel, and the channels can be selected as required. A water outlet one-way valve is arranged at the spring pressure water outlet, a water outlet damping valve is arranged below the one-way valve, the water outlet damping valve makes the water in the piston cavity flow out slowly, avoids the risk of rebound caused by the instantaneous downward movement of the piston, limits the release speed of the piston rod spring through the water pressure counter-acting principle of the piston cavity, so that the piston rod spring cannot be released instantaneously, the pressure rod slowly discharges and smoothly lifts up, and the risk of rebound caused by the instantaneous downward movement of the piston is avoided.

[0019] The saturation cavity is arranged between the piston cavity and the brewing head body, and can keep water flow in a stable saturated state during the brewing process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view of the present application;

[0021] Figure 2 is a front view of the present application;

[0022] Figure 3 is a rear view of the present application;

[0023] Figure 4 is a sectional view of the present application;

[0024] Figure 5 is Figure 4 is an enlarged view of the middle A part.

[0025] In the figure: 1 brewing head body, 2 brewing head bayonet, 3 pressure rod, 4 hinge assembly, 5 double waterway channel, 6 spring, 7 piston rod, 8 piston, 9 water inlet, 91 spring waterway, 92 pump waterway, 10 double-way valve group. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, 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 those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] Embodiment:

[0029] Please refer to Figures 1-5 The present application provides the following technical solutions:

[0030] A spring coffee machine double water channel anti-rebound brewing head, the brewing head main body 1 is the basic framework of the whole brewing head, has excellent mechanical strength, can withstand the stress caused by the pressure of the spring 6, water pressure and temperature change in the long-term use process, and can also ensure the safety of contact with food, in line with the national food safety standards.

[0031] The double water channel 5 is the key structure for realizing the dual-purpose function of the head, and the double water channel 5 includes two independent water inlets 9, which correspond to different working modes and are the core of water path switching; the upper water inlet 9 is a spring water path 91, which is connected to the water supply system of the coffee machine, and the other end is directly connected to the piston cavity in the inner cavity of the brewing head main body 1; when the pipe diameter of the spring water path 91 moves on the piston 8 to form negative pressure, water can be quickly and stably supplied to the piston cavity, meeting the brewing requirements under the spring pressure mode;

[0032] The lower water inlet 9 is a pump water path 92, which is also connected to the water supply system, but differs from the spring water path 91 in that the pump water path 92 is additionally provided with an external pump device on the connection path, and the end thereof is 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 water path 92 is to cooperate with the external pump system to provide additional power for the water flow, reduce the operation strength, and under the pump pressure mode, the water flow can enter the double-way valve group 10 with stable pressure, thereby realizing efficient and labor-saving brewing operation;

[0033] The water inlet one-way valve is an important part of the double water channel 5, which will only open under certain pressure conditions, effectively preventing water flow from flowing back in the non-working state, avoiding waterway pollution and functional failure. In the spring pressure mode, when the piston cavity forms negative pressure by moving the piston 8 upward, and the water pressure of 2Bar in the boiler acts on the water inlet one-way valve, the one-way valve core is opened, and the water flow enters the piston cavity through the spring water path 91; when the piston 8 moves downward, the water pressure in the piston cavity rises, and the water inlet one-way valve core is closed under the action of the reverse pressure, preventing water flow from flowing back. The working principle of the water inlet one-way valve of the pump water path 92 is similar, which will only open when the external pump system is started and the water pressure reaches the set value, ensuring that the two water paths work independently and do not interfere with each other.

[0034] The piston cavity formed in the inner cavity of the brewing head body 1 is a key space for realizing water suction, compression and release. The bottom of the piston cavity is tightly connected with the double-way valve group 10, and the two are sealed by a sealing ring to prevent water leakage. The double-way valve group 10 is a core component for connecting the piston cavity and the outside. The double-way valve group 10 is internally provided with a water outlet check valve and a water outlet damping valve. The two valves work cooperatively to control the water output and release speed, and the opening pressure thereof matches the working pressure in the piston cavity. When the piston 8 moves downward and the water pressure in the piston cavity rises to a set value, the valve core of the water outlet check valve is opened, and the high-pressure water flow enters the subsequent passage of the double-way valve group 10. When the piston 8 moves upward and a negative pressure is formed in the piston cavity, the valve core of the water outlet check valve is closed under the action of its own gravity and spring force, preventing external air from entering the piston cavity and ensuring the smooth water suction process.

[0035] The water outlet damping valve is installed at the bottom of the water outlet check valve and is a core component for realizing the anti-rebound function. The damping valve adopts a structure design combining a throttle hole and a valve core. By controlling the aperture of the throttle hole and the movement stroke of the valve core, the water discharge speed is limited. When the high-pressure water flow enters the water outlet damping valve through the water outlet check valve, the water flow needs to overcome the resistance in the damping valve to flow out slowly. This process makes the water flow in the piston cavity unable to be discharged instantaneously, thereby forming a certain back pressure in the cavity. The back pressure generates an upward counter thrust on the downward-moving piston 8, offsets part of the elastic potential energy of the spring 6, slows down the downward movement speed of the piston 8, and then realizes the slow release of the spring 6, avoiding the instantaneous rebound of the pressure rod 3. The damping coefficient of the water outlet damping valve is adjusted through a large number of experiments to ensure that the water flow can be smoothly discharged and the spring can be slowly released under different working pressures, and the brewing effect and safety are considered.

[0036] In addition, the sealing ring arranged on the side wall of the piston cavity can tightly fit the inner wall of the piston cavity and the outer wall of the piston 8, and always maintain good sealing performance during the upward and downward movement of the piston 8, preventing water leakage from the gap between the piston and the cavity wall, ensuring that the pressure in the piston cavity can be effectively transmitted, and ensuring the stability of the brewing pressure.

[0037] A special mounting interface is reserved on the outside of the brewing head body 1 for fixing the double-water-way channel 5. The piston cavity provides a stable space for the upward and downward reciprocating movement of the piston 8. The piston rod 7 and the spring 6 are arranged in the piston cavity. A connecting structure matched with the pressure rod 3 and the hinge assembly 4 is designed on the top of the brewing head body 1. One end of the pressure rod 3 is connected with the top of the brewing head body 1 through the hinge assembly 4, and the other end is a free end for user holding and operation.

[0038] The hinge assembly 4 is a rotating part connecting the pressing rod 3 and the brewing head body 1, which ensures that the pressing rod 3 moves flexibly and smoothly without jamming during rotation. When the user pulls down the pressing 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 pressing rod 3, the piston 8 moves downward under the elastic potential energy of the spring 6, and the pressing rod 3 is reset through the piston rod 7 and the hinge assembly 4. The connection strength of the hinge assembly 4 has been strictly tested and can withstand long-term repeated operating force, ensuring the safety and reliability of the entire operation process.

[0039] The piston rod 7 installed in the middle of the brewing head body 1 is a key transmission part connecting the pressing rod 3 and the piston 8, which can withstand long-term repeated tensile and compressive stress. The top of the piston rod 7 is connected with the pressing rod 3 through a pin shaft, and the bottom is connected with the piston 8 through threads and fixed by a lock nut, ensuring that the two are firmly connected and will not relatively displace during movement. The piston rod 7 is sleeved with a spring 6 on the outside, which is made of high-temperature-resistant silicon manganese spring steel and can provide stable and sufficient elastic potential energy for the reset of the piston 8. The spring 6 is located above the piston 8, and when the piston 8 moves upward, the spring 6 is compressed to store elastic potential energy; when the piston 8 moves downward, the spring 6 releases the elastic potential energy to drive the piston 8 to move;

[0040] The upward and downward movement of the piston 8 directly changes the volume of the piston chamber, thereby realizing the suction and release of water flow: when the piston 8 moves upward, the volume of the piston chamber increases, forming a negative pressure to suck in water flow; when the piston 8 moves downward, the volume of the piston chamber decreases, the water pressure rises, and the water flow is released. Since the spring 6 moves synchronously with the piston 8, the change of the elastic potential energy of the spring 6 directly affects the movement speed and pressure of the piston 8, so the performance parameters of the spring 6 are crucial to the stability of the entire brewing process.

[0041] A saturation chamber is arranged between the piston chamber and the brewing head body, which can keep the water flow in a stable saturated state during the brewing process. The saturation chamber introduces steam through the coffee machine water supply system, and in the closed space, the liquid and steam are in a balanced state, the vaporization rate of liquid molecules is the same as the liquefaction rate of steam molecules, which can make the temperature in the brewing head more stable. When the temperature in the piston chamber changes, the saturation chamber can keep the water flow in a stable saturated state during the brewing process, reducing the problem of insufficient extraction caused by unstable temperature.

[0042] Working principle:

[0043] The present scheme adopts double water path channels, the upper water inlet 9 is a spring water path 91, and the lower water inlet 9 is a pump water path 92. Both sides of the water path are equipped with water inlet check valves, which can be switched as needed. People with less strength can use pump pressure operation, and people who like mechanical feeling and have more strength can use spring pressure operation, solving the problem of one head for two uses.

[0044] Adopt the mechanism of double water channel: the upper water inlet 9 is a spring water channel, the lower water inlet 9 is a pump water channel, the two water channels are independent and the water inlets 9 are equipped with water inlet check valves, which can be flexibly switched according to the needs of users, and people with small strength can use pump pressure to assist operation without manually applying large force; people who like mechanical feeling and have large strength can directly operate with spring pressure to fully experience the operation feeling of manual control, which fundamentally solves the problem of single function of traditional brewing head and cannot adapt to different user habits, and truly realizes one head with double functions.

[0045] The pump water channel 92 is more convenient to operate, the lower water inlet 9 relies on external pump pressure to provide power, starts the pump pressure system, and water can enter the double-way valve group 10 through the pump water channel 92, and then complete brewing through the subsequent channel, which greatly reduces the operation strength, and is especially suitable for people with small strength or pursuing convenient operation;

[0046] The spring pressure water channel 91 cooperates with the pressure rod 3 and the hinge assembly 4 to operate: when the user pulls down the pressure rod 3, the hinge assembly 4 drives the piston rod 7 in the middle of the brewing head body 1 to move upward synchronously, the spring 6 outside the piston rod 7 is compressed with the piston 8 moving upward, at this time, the volume of the piston cavity increases to form negative pressure, and the spring pressure water channel 91 opens the water inlet check valve, and water flows into the piston cavity to complete water storage; after the pressure rod 3 is released, the compressed spring 6 releases elastic potential energy, pushes the piston 8 to slide downward in the piston cavity, the volume of the piston cavity decreases, the water pressure rises, the upper water inlet check valve closes, the high-pressure water opens the water outlet check valve in the double-way valve group 10 at the bottom of the piston cavity, and then completes the brewing and water spraying action.

[0047] To avoid the safety hazard of spring pressure operation, the water outlet damping valve is specially installed at the bottom of the water outlet check valve of the double-way valve group 10; the traditional brewing head has no slow-release structure, which can cause the piston 8 to move downward quickly and the pressure rod 3 to rebound sharply, which has the risk of equipment damage and personal injury; the water outlet damping valve can limit the discharge speed of water in the piston cavity, so that the water flows slowly, at this time, the reserved water in the piston cavity can generate upward thrust to the piston 8 moving downward, which can offset part of the thrust of the spring 6, so that the spring 6 cannot release energy instantly, the pressure rod 3 is lifted stably with the water flow, and returns to the initial state after the water is completely discharged, which not only retains the mechanical feeling of spring pressure operation, but also considers the safety of use, and further improves the practical value of the double water channel.

[0048] The foregoing illustrates and describes embodiments of the present application. However, it is to be understood that the application is not limited to the above-described embodiments, and that various changes and modifications can be suggested to one skilled in the art. It is intended that the present application encompass any and all such changes and modifications without departing from the spirit or scope of the underlying principles of the application. In addition, it should be understood that the figures are not necessarily drawn to scale and that, where appropriate, reference numerals have been maintained from one figure to another and from one embodiment to another in order to illustrate similar constructions.

[0049] While the application has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, since the scope of the application is indicated by the appended claims rather than by the foregoing description, and all changes and modifications that come within the meaning of the claims are desired to be embraced therein.

Claims

1. A spring coffee machine double waterway channel anti-rebound brewing head, comprising a brewing head body (1), characterized in that: The brewing head body (1) is externally provided with a double waterway channel (5), the double waterway channel (5) comprises two water inlets (9) arranged in an upper and lower manner, the upper water inlet (9) is a spring waterway (91), and the lower water inlet (9) is a pump waterway (92), and a water inlet check valve is arranged in each water inlet (9); A piston cavity is arranged in the inner cavity of the brewing head body (1), a double-way valve group (10) is arranged at the bottom of the piston cavity, a water outlet check valve is arranged in the double-way valve group (10), and a water outlet damping valve is arranged at the bottom of the water outlet check valve; the spring waterway (91) is communicated to the piston cavity, the pump waterway (92) is symmetrically arranged at two sides of the double-way valve group (10), and the pump waterway (92) is communicated to the double-way valve group (10); A piston rod (7) is arranged in the middle of the brewing head body (1), a spring (6) is sleeved outside the piston rod (7), a piston (8) is arranged 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), and a sealing ring is arranged on the side wall of the piston cavity.

2. A spring-powered coffee maker dual water path channel bounce-back prevention brewing head according to claim 1, characterized in that: A pressing rod (3) is arranged at the top of the brewing head body (1), a hinge assembly (4) is arranged between the top of the brewing head body (1) and the pressing rod (3), and the top of the piston rod (7) is connected with the pressing rod (3); The pressing rod (3) is pulled downward to drive the hinge assembly (4) to move, the piston rod (7) and the piston (8) move upward synchronously and compress the spring (6), the water outlet check valve arranged at the bottom of the inner cavity of the piston cavity is closed, the water inlet check valve is opened when moving upward, and the water flows into the piston cavity through the negative pressure in the piston cavity and the water pressure of 2 Bar in the boiler.

3. A spring powered coffee maker dual water path channel bounce back prevention brew head according to claim 1, wherein: The water outlet damping valve is arranged at the bottom of the water outlet check valve, the water in the piston cavity cannot be discharged instantaneously through the water outlet damping valve, the force of the water pressure on the piston (8) limits the release of the piston rod (7) and the spring (6), and limits the rebound speed of the pressing rod (3); after the water completely passes through the water outlet damping valve, the spring (6) and the pressing rod (3) can only be completely restored to the initial state.

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