Coffee brewing head structure

Abstract

The utility model relates to a coffee brewing head structure, including brewing device and brewing seat, the brewing device includes seat body, brewing head, water distribution piece, shower piece, first sealing washer and second sealing washer, the seat body is aluminium alloy seat body, the seat body is provided with installation cavity and card and is placed cavity, the installation cavity and card and are placed cavity intercommunication, the brewing head is PPS brewing head, the brewing head has opened hot water passage, the second sealing washer is covered in brewing head, the first sealing washer sets up in the installation cavity, the brewing head sets up in the installation cavity, and brewing head and seat body clamp the first sealing washer, avoid the defect that the plastic brewing head leads to the sealing of heat aging and the fracture, also avoided the problem that the aluminium alloy brewing head surface generates aluminium hydroxide deposit.

Description

Technical Field

[0001] This utility model relates to the structure of a coffee brewing head. Background Technology

[0002] A coffee machine is a device that extracts coffee by pressurizing hot water or steam to bring it into contact with coffee grounds. As one of the core components of a coffee machine, the brewing head directly affects the machine's lifespan, food safety, and the quality of the coffee. Currently, common materials for brewing heads include plastic, aluminum alloy, stainless steel, and brass, each reflecting different performance characteristics and market positioning.

[0003] Plastic brewing heads are typically injection molded from reinforced materials such as PA66+GF, and are widely used in home coffee machines due to their low processing cost and light weight. However, under long-term high-temperature and high-pressure working environments, plastic materials are prone to thermal aging and deformation, leading to a decrease in thread engagement force and consequently a weakening of high-pressure sealing performance. After a period of use, problems such as water leakage, poor sealing, and even funnel ear breakage often occur, affecting the stability and service life of the equipment.

[0004] To address strength concerns, some coffee machines use brewing heads made of die-cast aluminum alloy. Aluminum alloy offers superior mechanical strength and durability compared to plastic, and its cost is moderate, making it a popular choice for many home coffee machine manufacturers. However, during prolonged contact with high-temperature liquids and steam, a white, flocculent aluminum hydroxide deposit easily forms on the surface of aluminum alloy. This deposit not only affects the user's appearance but also raises concerns about food safety, resulting in numerous complaints and questions in the market.

[0005] On the other hand, stainless steel and brass brewing heads offer superior strength and corrosion resistance, making them particularly suitable for commercial coffee machines. However, due to their higher material and processing costs, they are less likely to gain widespread adoption in the price-sensitive home and light commercial coffee machine markets. Utility Model Content

[0006] The purpose of this invention is to provide a coffee brewing head structure that achieves a balance between cost, strength, and food safety.

[0007] The purpose of this utility model is achieved as follows: A coffee brewing head structure includes a brewing device and a brewing base. The brewing device includes a base body, a brewing head, a water distributor, a shower head, a first sealing ring, and a second sealing ring. The base body is an aluminum alloy base body and is provided with an installation cavity and a locking cavity, which are connected to each other. The brewing head is a PPS brewing head with a hot water channel. The second sealing ring is placed on the brewing head, and the first sealing ring is set in the mounting cavity. The brewing head is set in the mounting cavity, and the brewing head and the base clamp the first sealing ring. The water divider is installed on the brewing head and located below the hot water channel. The hot water discharged from the hot water channel is dispersed by the water divider. The shower head has drainage holes spaced apart, and the shower head is set on the rinsing head and located below the water distribution plate; The brewing base has a coffee powder receiving cavity, and a coffee outlet is located at the bottom of the coffee powder receiving cavity. The brewing base extends into the locking cavity and is locked in place so that the top of the brewing base abuts against the second sealing ring, while the water distributor and the shower head enter the coffee powder receiving cavity.

[0008] By incorporating a PPS brewing head into an aluminum alloy base, the components in direct contact with hot water are made of a high-temperature resistant, corrosion-resistant material that meets food safety requirements. PPS (polyphenylene sulfide) possesses excellent thermal stability, dimensional stability, and hydrolysis resistance, maintaining structural strength and sealing performance under long-term high-temperature and high-pressure conditions without significant deformation or aging. This avoids the defects of plastic brewing heads, such as poor sealing and breakage due to heat aging, and also prevents the formation of aluminum hydroxide deposits on the surface of aluminum alloy brewing heads. Simultaneously, it maintains the strength and cost advantages of the aluminum alloy base. The cooperation of the first and second sealing rings improves the sealing reliability during brewing, preventing water and air leakage. The water distributor and shower head evenly distribute hot water, ensuring uniform water distribution to the coffee grounds, thereby improving coffee extraction and taste. Therefore, this structure balances cost, strength, food safety, and extraction quality, making it suitable for ordinary home coffee machines and light commercial coffee machines.

[0009] The objective of this utility model can also be achieved by the following technical measures: Furthermore, a first opening is provided at the inlet of the hot water channel corresponding to the seat. By providing a first opening at the inlet of the hot water channel corresponding to the seat, hot water can enter the brewing head more smoothly, facilitating the connection and guidance of the internal and external water channels of the structure, and improving the assembly convenience of the brewing head and the overall fluid flow.

[0010] Furthermore, the brewing head has an interface for connecting a pressure gauge, and the first opening is connected to the interface. By providing an interface for connecting a pressure gauge on the brewing head and connecting the first opening to this interface, water pressure changes during the brewing process can be detected and monitored in real time, facilitating operators to judge the extraction status and improving the reliability of the coffee machine in terms of extraction stability and quality control.

[0011] Furthermore, the water distribution plate is a stainless steel water distribution plate. By using stainless steel (such as SUS304) for the water distribution plate, its excellent strength and corrosion resistance not only ensure the stability and uniformity of hot water dispersion, but also prevent the corrosion of components or the precipitation of harmful substances caused by long-term high temperature and high humidity environments, thereby improving service life and food safety.

[0012] Furthermore, the shower head is made of stainless steel. By using stainless steel (such as SUS304) for the shower head and creating multiple dense drainage holes on it, hot water can evenly penetrate the coffee grounds layer, thereby improving water flow distribution, ensuring consistent water distribution to the coffee grounds, enhancing extraction efficiency and coffee taste, and also increasing the durability and ease of cleaning of the parts.

[0013] Furthermore, the first sealing ring is a silicone sealing ring. By using silicone material to make the first sealing ring, its good elasticity and softness can ensure sealing performance under high temperature environments, provide a more comfortable feel during operation, optimize the locking and releasing experience of the funnel, and improve user convenience.

[0014] Furthermore, the second sealing ring is a fluororubber sealing ring. By using fluororubber to make the second sealing ring, it has excellent heat resistance and corrosion resistance under high temperature and high pressure environments, and can reliably seal the edge of the brewing seat to prevent water or air leakage during brewing, thereby improving the stability and safety of brewing.

[0015] Furthermore, it also includes stainless steel bolts that pass through the water divider and lock the shower head, respectively. By using stainless steel bolts (such as SUS304) in the structure and locking the shower head through the water divider and shower head, it is ensured that the components remain firmly connected under long-term high temperature and high pressure environments, without loosening or corrosion, thereby improving assembly reliability and overall durability.

[0016] Furthermore, the water distribution plate has a water inlet, a first water outlet, and a second water outlet, which are respectively connected to the water inlet. By setting a water inlet and multiple water outlets on the water distribution plate and connecting the water outlets to the water inlet, secondary dispersion and uniform distribution of hot water can be achieved, further improving the uniformity of water flow during brewing, avoiding localized impact on coffee grounds, and ensuring the stability and consistency of extraction flavor.

[0017] Furthermore, it also includes a coffee powder screen, which is disposed in the coffee powder receiving cavity, and the brewing base is provided with a handle. By placing the coffee powder screen in the coffee powder receiving cavity, the coffee powder can be concentrated and subjected to force, preventing powder from directly entering the water channel or causing blockage; at the same time, the handle on the brewing base improves ease of use.

[0018] The beneficial effects of this utility model are as follows: This invention achieves an optimized configuration of structure and materials by combining a PPS rinsing head, stainless steel water divider and shower head, as well as sealing rings and fasteners of different materials on an aluminum alloy base. This solution utilizes the strength and cost advantages of aluminum alloy and the high temperature resistance, corrosion resistance and food safety characteristics of PPS material to solve the problems of easy aging and deformation of traditional plastic rinsing heads and easy formation of deposits in aluminum alloy rinsing heads.

[0019] In this invention, the water distribution plate and the shower head are made of stainless steel, which ensures the uniformity and stability of hot water dispersion, avoids local impact on coffee powder, and improves the uniformity of extraction and coffee flavor. This invention improves the handling during assembly by selecting appropriate sealing rings, enhances sealing reliability during brewing, and effectively prevents water and air leakage. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the coffee brewing head structure.

[0021] Figure 2 An exploded view of the coffee brewing head structure. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 2 As shown, a coffee brewing head structure includes a brewing device and a brewing base 5. The brewing device includes a base 1, a brewing head 2, a water distributor 3, a shower head 4, a first sealing ring 9, and a second sealing ring 6. The base 1 is an aluminum alloy base and is provided with an installation cavity 11 and a locking cavity 12, which are connected. The brewing head 2 is a PPS brewing head, which has a hot water channel 21. The second sealing ring 6 is fitted on the brewing head 2, and the first sealing ring 9 is set in the mounting cavity 11. The brewing head 2 is set in the mounting cavity 11, and the brewing head 2 and the base 1 clamp the first sealing ring 9. The water divider 3 is installed on the brewing head 2 and located below the hot water channel 21. The hot water discharged from the hot water channel 21 is dispersed by the water divider 3. The shower head 4 is spaced apart with drain holes 41, and the shower head 4 is disposed on the rinsing head 2 and located below the water distribution plate 3; The brewing base 5 has a coffee powder receiving cavity 51, and a coffee outlet 52 is opened at the bottom of the coffee powder receiving cavity 51. The brewing base 5 extends into the locking cavity 12 and is locked in place, so that the top of the brewing base 5 abuts against the second sealing ring 6, while the water distributor 3 and the shower head 4 enter the coffee powder receiving cavity 51.

[0023] Furthermore, the seat 1 is provided with a first opening 13 at the entrance of the hot water channel 21.

[0024] Furthermore, the brewing head 2 has an interface 22 for connecting a pressure gauge, and the first opening 13 is connected to the interface 22.

[0025] Furthermore, the water separator 3 is a stainless steel water separator.

[0026] Furthermore, the shower head 4 is a stainless steel shower head.

[0027] Furthermore, the first sealing ring 9 is a silicone sealing ring.

[0028] Furthermore, the second sealing ring 6 is a gas rubber sealing ring.

[0029] Furthermore, it also includes a stainless steel bolt 7, which passes through the water divider 3 to lock the brewing head 2, and the stainless steel bolt 7 passes through the shower head 4 to lock the brewing head 2.

[0030] Furthermore, the water divider 3 has a water inlet, a first water divider, and a second water divider, which are respectively connected to the water inlet.

[0031] Furthermore, it also includes a coffee powder mesh 8, which is disposed in the coffee powder receiving cavity 51, and the brewing base 5 is provided with a handle 10.

[0032] Methods to achieve a balance between cost, intensity, and food safety: By using aluminum alloy for the base 1, the design balances the mechanical strength of the overall structure with manufacturing cost advantages. Meanwhile, the brewing head 2, which comes into direct contact with hot water, is optimized to be made of PPS material, supplemented by stainless steel water distributor 3, shower head 4, and seals made of silicone and fluororubber. This not only ensures the stability and durability of the components under high temperature and pressure environments but also avoids the food safety hazards associated with deposits forming on the aluminum alloy surface. This combined structure achieves a reasonable balance between cost, strength, and food safety, making it suitable for widespread application in home and light commercial coffee machines.

[0033] Coffee brewing method In use, the coffee powder net 8 containing coffee powder is placed into the coffee powder receiving cavity 51 of the brewing base 5, and the brewing base 5 is secured in the retaining cavity 12 by the handle 10, so that its top abuts against the second sealing ring 6 to form a seal; the hot water passage is activated, and hot water enters the hot water channel 21 of the brewing head 2 through the first opening 13 of the base body 1, and is then evenly dispersed by the water distributor 3, and evenly sprinkled on the coffee powder layer through the dense drainage holes 41 of the shower head 4, so as to achieve full immersion and extraction of coffee powder. Finally, the coffee liquid flows out from the liquid outlet at the bottom of the coffee powder receiving cavity 51, thus completing the coffee brewing process.

Claims

1. A coffee brewing head structure, comprising a brewing device and a brewing base, characterized in that: The brewing device includes a base, a brewing head, a water divider, a shower head, a first sealing ring, and a second sealing ring. The base is an aluminum alloy base and has an installation cavity and a locking cavity, which are connected to each other. The brewing head is a PPS brewing head with a hot water channel. The second sealing ring is placed on the brewing head, and the first sealing ring is set in the mounting cavity. The brewing head is set in the mounting cavity, and the brewing head and the base clamp the first sealing ring. The water divider is installed on the brewing head and located below the hot water channel. The hot water discharged from the hot water channel is dispersed by the water divider. The shower head has drainage holes spaced apart, and the shower head is set on the rinsing head and located below the water distribution plate; The brewing base has a coffee powder receiving cavity, and a coffee outlet is located at the bottom of the coffee powder receiving cavity. The brewing base extends into the locking cavity and is locked in place so that the top of the brewing base abuts against the second sealing ring, while the water distributor and the shower head enter the coffee powder receiving cavity.

2. The coffee brewing head structure according to claim 1, characterized in that: The seat body has a first opening at the entrance of the hot water channel.

3. The coffee brewing head structure according to claim 2, characterized in that: The brewing head has an interface for connecting a pressure gauge, and the first opening is connected to the interface.

4. The coffee brewing head structure according to claim 1, characterized in that: The water separator is a stainless steel water separator.

5. The coffee brewing head structure according to claim 1, characterized in that: The shower head blades are made of stainless steel.

6. The coffee brewing head structure according to claim 1, characterized in that: The first sealing ring is a silicone sealing ring.

7. The coffee brewing head structure according to claim 1, characterized in that: The second sealing ring is a gas rubber sealing ring.

8. The coffee brewing head structure according to claim 1, characterized in that: It also includes stainless steel bolts that pass through the water divider to lock the brewing head, and stainless steel bolts that pass through the shower head to lock the brewing head.

9. The coffee brewing head structure according to claim 4, characterized in that: The water divider has an inlet, a first water divider, and a second water divider, which are respectively connected to the inlet.

10. The coffee brewing head structure according to claim 1, characterized in that: It also includes a coffee powder mesh, which is disposed in the coffee powder receiving cavity, and the brewing base is provided with a handle.

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