Tesla valve type temperature control dripping pipe and instant heating type dripping coffee machine

Abstract

The invention relates to the technical field of coffee machines, in particular to a Tesla valve type temperature control dripping pipe and an instant heating type dripping coffee machine. The Tesla valve type temperature control weep pipe comprises a pipe body, the front end of the pipe body is provided with a water inlet hole, and the rear end of the pipe body is provided with at least one exhaust hole column and at least one water outlet hole; the middle end of the pipe body is sequentially provided with a side V-shaped flow dividing blocking piece and a blocking piece assembly used for forming a Tesla valve channel in the water flow direction. By means of the collaborative design of the V-shaped flow dividing blocking piece on the front section side, the blocking piece assembly used for forming a Tesla valve channel on the middle section, the exhaust hole column on the rear section and the water outlet hole, on the premise of not depending on a water pump and a flow control technology, multiple times of speed reduction, pressure reduction and heat release of water flow are achieved, the water temperature of the instant heating type coffee machine is increased to 92 DEG C within one minute, and the water temperature of the instant heating type coffee machine is increased to 92 DEG C within one minute. And the temperature is stabilized in the range of 92-96 DEG C in the subsequent brewing process, so that the strict requirement of ECBC certification on the water temperature is met.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machines, and more specifically, it relates to a Tesla valve type temperature-controlled drip water pipe and an instant drip coffee machine. Background Art

[0002] The instant drip coffee machine quickly heats water to 96°C - 100°C through an instant heating element, and the heated hot water evenly drips onto coffee powder through a drip water pipe for extraction. 1 - 1.25 liters of coffee can be extracted within 4 - 6 minutes, which has the characteristic of simple operation.

[0003] In order to ensure the taste of coffee, the control of water temperature is particularly important. Therefore, the European Coffee Machine Center (ECBC) has formulated coffee machine certification standards, requiring that when the coffee machine is operating normally, the temperature in the brewing basket should reach 92°C within the first minute of brewing and remain between 92°C - 96°C during the subsequent entire brewing cycle, and the temperature shall not exceed 96°C. Only coffee machines that meet these standards can obtain the ECBC certification mark.

[0004] However, most existing instant drip coffee machines mostly adopt an internal structure such as Figure 1 the drip water pipe shown. This type of drip water pipe has been verified to cause the water temperature to exceed 96°C during subsequent brewing processes, and the temperature fluctuates greatly, which does not meet the ECBC certification requirements. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a Tesla valve type temperature-controlled drip water pipe to solve the technical problem that the existing drip water pipe cannot keep the water temperature between 92°C - 96°C during the subsequent brewing cycle.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions:

[0007] A Tesla valve type temperature-controlled drip water pipe includes a pipe body; a water inlet hole is opened at the front end of the pipe body, and at least one exhaust hole column and at least one water outlet hole are opened at the rear end thereof; a side V-shaped flow splitting baffle and a baffle assembly for forming a Tesla valve channel are sequentially arranged in the middle of the pipe body along the water flow direction.

[0008] Preferably, the baffle assembly includes a left front converging baffle and several J-shaped left decelerating baffles that are sequentially connected end to end on the left side of the pipe body, a right front converging baffle and several J-shaped right decelerating baffles that are sequentially connected end to end on the right side of the pipe body, and several inclined baffles located between the J-shaped left decelerating baffles and the J-shaped right decelerating baffles; the left front converging baffle, the J-shaped left decelerating baffles, the right front converging baffle, the J-shaped right decelerating baffles and the inclined baffles are all fixedly connected to the pipe body.

[0009] Preferably, the baffle assembly further includes a left rear confluence baffle located on the left side of the pipe body and connected to the J-shaped left deceleration baffle at the end, and a right rear confluence baffle located on the right side of the pipe body and connected to the J-shaped right deceleration baffle at the end.

[0010] Preferably, adjacent inclined baffles are arranged in a staggered manner along the water flow direction.

[0011] Preferably, two exhaust hole columns and seven water outlet holes are provided at the rear end of the pipe body.

[0012] Preferably, the two exhaust hole columns are respectively located at the front end and the rear end of the seven water outlet holes, and the exhaust hole column located at the front end of the seven water outlet holes is used to divide the water flow flowing through the rear end of the baffle assembly.

[0013] The present invention also provides an instant drip coffee maker, which includes the aforementioned Tesla valve type temperature control drip water pipe.

[0014] Preferably, it further includes a frame, a heater arranged inside the frame, a water storage tank arranged on the top of the frame, a connecting pipe arranged on the water outlet of the heater and used to deliver hot water to the pipe body, and a brewing basket arranged on the frame and used to receive the water droplets flowing out from the water outlet holes; the top end of the connecting pipe is communicated with the water inlet of the pipe body, and its bottom end is communicated with the water outlet of the heater; the water storage tank is communicated with the heater through a one-way valve conduit.

[0015] In summary, the present invention has the following beneficial effects: Through the collaborative design of the front-section side V-shaped diversion baffle, the baffle assembly for forming the Tesla valve channel in the middle section, and the rear-section exhaust hole column and water outlet hole, without relying on pumps and flow control technologies, multiple speed reductions, pressure reductions, and heat releases of the water flow are achieved, enabling the water temperature of the instant coffee maker to rise to 92 °C within 1 minute and remain stable within the range of 92 °C - 96 °C during subsequent brewing processes, meeting the strict requirements of the ECBC certification for water temperature; at the same time, the structure of the water circuit system is simplified, the production cost is significantly reduced, the market competitiveness of the product is enhanced, and the consumer trust can be improved through the ECBC logo. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a partial top view of the drip water pipe in Comparative Example 1 of the present invention;

[0017] Figure 2 is an exploded view of the Tesla valve type temperature control drip water pipe in the present invention;

[0018] Figure 3 is a front view of the Tesla valve type temperature control drip water pipe in the present invention;

[0019] Figure 4 is a partial top view of the Tesla valve type temperature control drip water pipe in the present invention;

[0020] Figure 5It is the water circuit diagram of the Tesla valve type temperature control drip water pipe in the present invention;

[0021] Figure 6 It is the structural schematic diagram of the instant - heating drip coffee maker in the present invention;

[0022] Figure 7 It is the sectional view of the instant - heating drip coffee maker in the present invention;

[0023] Figure 8 It is the partial top view of the drip water pipe of Comparative Example 2 in the present invention;

[0024] Figure 9 It is the partial top view of the drip water pipe of Comparative Example 3 in the present invention;

[0025] Figure 10 It is the temperature control curve graph of the Tesla valve type temperature control drip water pipe in the present invention. Detailed implementation manners

[0026] To make the objectives, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0027] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific circumstances. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] The present invention provides a Tesla valve type temperature-controlled drip water pipe, as Figure 2-5 shown, which includes a pipe body 1; a water inlet hole 11 is provided at the front end of the pipe body 1, and at least one exhaust hole column 12 and at least one water outlet hole 13 are provided at the rear end thereof; a side V-shaped flow dividing baffle 14 and a baffle assembly 15 for forming a Tesla valve channel are sequentially arranged in the middle of the pipe body 1 along the water flow direction.

[0031] Specifically, the pipe body 1 is composed of a bottom shell, an upper cover and a sealing ring for sealing the bottom shell and the upper cover in a conventional connection manner, wherein the bottom shell is made by an integral molding process, and its material can be plastic or alloys such as stainless steel, copper and aluminum. In this embodiment, the bottom shell and the upper cover are injection molded and bonded by an ultrasonic process to form a water channel pipeline. The front end of the pipe body 1 is the water inlet hole 11, which is used to introduce the true spray water generated by the heater 3 into the pipe body 1. The side V-shaped flow dividing baffle 14 located at the front end is in a "<" shape, and its function is to block and divide the direct spray water flow entering this channel area, so that the flow velocities converge after the division, achieving the first deceleration and pressure reduction effects. The baffle assembly 15 located in the middle forms a Tesla valve channel through special layout, and its function is to reduce the water flow velocity by 20%-30% by using the asymmetric bends on both sides and its internal flow blocking structure, achieving secondary deceleration and pressure reduction, and allowing the water flow to contact a larger area to reduce its temperature. The two exhaust hole columns 12 located at the rear end have the functions of releasing air pressure and flow division, and the seven water outlet holes 13 disperse the water flow, and are required to achieve the reduction of water temperature and gas pressure.

[0032] The Tesla valve channel in this embodiment refers to a channel formed according to the Tesla valve principle, and the Tesla valve refers to a non-source flow channel structure that realizes unidirectional fluid guidance and enhanced resistance through its structure. Reference can be made to the Tesla valve channel principle disclosed by Nikola Tesla in 1920.

[0033] The working principle of the present invention is as follows: Cold water is heated to 100°C by the heater 3, and the water is discharged from the top hole of the heater 3 using thermal pressure and enters the drip pipe composed of the Tesla valve structure and flows out (see Figure 7 ). The water flow enters from the water inlet hole 11 at the front end of the side V-shaped shunt baffle 14. When it passes through the side V-shaped shunt baffle 14, it will be shunted, blocking and shunting the direct injection water flow entering this channel area, reducing its flow rate and pressure. Then, the inclined baffle 155 at the entrance of the Tesla valve channel converges the water flow and it flows through the channel, realizing secondary reduction of the water flow rate and pressure, and using the effect of reducing the water flow rate to effectively release its temperature, causing the temperature to drop. When the water flow reaches the end of the channel, the first exhaust hole column 12 shunts the water flow for the second time and the second exhaust hole column 12 releases the pressure, allowing the water flow to contact a larger area and slowly converge to flow out from the 7 water outlet holes 13, realizing the reduction of the water temperature to within the range of 95°C. When the water flow reaches the designated position, it meets the ECBC requirement that the water temperature reaches 92°C within 1 minute, and keeps the water temperature above 92°C and below 96°C during the subsequent 5-minute operation.

[0034] Further, the baffle assembly 15 includes a left front converging baffle 151 and several J-shaped left decelerating baffles 152 that are sequentially connected end to end on the left side of the pipe body 1, a right front converging baffle 153 and several J-shaped right decelerating baffles 154 that are sequentially connected end to end on the right side of the pipe body 1, and several inclined baffles 155 located between the J-shaped left decelerating baffle 152 and the J-shaped right decelerating baffle 154; the left front converging baffle 151, the J-shaped left decelerating baffle 152, the right front converging baffle 153, the J-shaped right decelerating baffle 154, and the inclined baffle 155 are all fixedly connected to the pipe body 1.

[0035] As Figure 4 shown, the left front converging baffle 151 and the right front converging baffle 153 form a first-stage cooling and pressure-reducing channel in the shape of a flared mouth, reducing the speed and converging the water flow dispersed by the side V-shaped shunt baffle 14. One J-shaped left decelerating baffle 152, one J-shaped right decelerating baffle 154, and two inclined baffles 155 form an asymmetric heart-shaped second-stage cooling and pressure-reducing channel, reducing the speed and converging the water flow converged by the first-stage cooling and pressure-reducing channel again; among them, the second-stage cooling and pressure-reducing channel is the smallest repeating unit, and its quantity is set according to actual needs.

[0036] Furthermore, the baffle assembly 15 further includes a left rear confluence baffle 156 located on the left side of the pipe body 1 and connected to the J-shaped left deceleration baffle 152 at the end, and a right rear confluence baffle 157 located on the right side of the pipe body 1 and connected to the J-shaped right deceleration baffle 154 at the end.

[0037] As Figure 4 shown, the left rear confluence baffle 156 and the right rear confluence baffle 157 form a drainage channel arranged in parallel, converging the water flow converged by the secondary cooling and pressure reduction channels at the end and guiding it to the exhaust hole column 12. In practical applications, the left rear confluence baffle 156 can be omitted, and correspondingly, a J-shaped left deceleration baffle 152 is added, and a drainage channel arranged relatively in parallel is formed by using this J-shaped left deceleration baffle 152 and the right rear confluence baffle 157.

[0038] Furthermore, adjacent inclined baffles 155 are arranged in a staggered manner along the water flow direction.

[0039] As Figure 4 shown, the J-shaped left deceleration baffle 152 and the J-shaped right deceleration baffle 154 in the same repeating unit are mutually staggered and arranged asymmetrically, so that the adjacent inclined baffles 155 are also arranged in a staggered manner. The inclined baffle 155 is arranged in parallel with the long side of the corresponding J-shaped left deceleration baffle 152 or J-shaped right deceleration baffle 154 and is close to its bottom (the hooked part).

[0040] Furthermore, the number of exhaust hole columns 12 and water outlet holes 13 can be set according to actual needs. In this embodiment, the number of exhaust hole columns 12 is two, and the number of water outlet holes 13 is seven. The seven water outlet holes 13 are arranged in a ring shape. One exhaust hole column 12 is located at the front end of the seven water outlet holes 13, and the other exhaust hole column 12 is located at the rear end of the seven water outlet holes 13.

[0041] The present invention also provides an instant drip coffee maker, which includes the aforementioned Tesla valve type temperature control drip water pipe, and specifically further includes a frame 2, a heater 4 arranged inside the frame 2, a water storage tank 3 arranged on the top of the frame 2, a connecting pipe 5 arranged on the water outlet of the heater 4 and used for delivering hot water to the pipe body 1, and a brewing basket 6 arranged on the frame 2 and used for receiving the water droplets flowing out from the water outlet hole 13; the top end of the connecting pipe 5 is communicated with the water inlet of the pipe body 1, and its bottom end is communicated with the water outlet of the heater 4; the water storage tank 3 is communicated with the heater 4 through a one-way valve conduit.

[0042] Specifically, the frame 2 is a hollow cylindrical shell, inside which a heater 4 is installed, and on top of which a water storage tank 3 is installed. The heater 4 is an instant heater that can quickly heat normal temperature water to 100 °C. The bottom end of the connecting pipe 5 is communicated with the heater 4, and its upper end passes through the water storage tank 3 and is communicated with the water inlet hole 11 of the pipe body 1. The normal temperature water in the water storage tank 3 enters the inside of the heater 4 through a one-way valve conduit (not shown in the attached drawings), and the one-way valve conduit is a conduit with a one-way valve installed on a conventional connecting pipe, which is used to prevent the boiling water in the heater 4 from flowing back due to pressure problems, ensuring that hot water continuously discharges from the water outlet hole 13. Therefore, the drip coffee maker does not require a water pump to transport hot water.

[0043] Next, the Tesla valve type temperature control drip pipe provided by the present invention (the internal structure is as Figure 4 shown), the drip pipe of Comparative Example 1 (the internal structure is as Figure 1 shown), the drip pipe of Comparative Example 2 (the internal structure is as Figure 8 shown), and the drip pipe of Comparative Example 3 (the internal structure is as Figure 9 shown) will be subjected to temperature control verification. The verification method is as follows: Place the temperature probe in the brewing basket 6, start the heater 4, record the temperature rise data and draw a temperature curve, and each scheme is tested three times. The results are shown in Table 1 and Figure 10 shown.

[0044] Table 1 Temperature control data

[0045]

[0046]

[0047] Combined with Table 1 and Figure 10 it can be seen that the temperature rise process provided by the present invention meets the certification requirements of ECBC, and the temperature fluctuation is small; in Comparative Example 1, the temperature is higher than 96 °C between 4 minutes and 42 seconds and 5 minutes and 05 seconds; in Comparative Example 2, the temperature is higher than 96 °C between 1 minute and 53 seconds and 5 minutes and 05 seconds; in Comparative Example 3, the temperature is higher than 96 °C between 2 minutes and 24 seconds and 5 minutes and 05 seconds.

[0048] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A Tesla valve type temperature-controlled drip water pipe, characterized in that, It includes a pipe body; a water inlet hole is provided at the front end of the pipe body, and at least one exhaust hole column and at least one water outlet hole are provided at the rear end thereof; a side V-shaped flow dividing baffle and a baffle assembly for forming a Tesla valve channel are sequentially arranged along the water flow direction in the middle of the pipe body.

2. The Tesla valve type temperature-controlled drip water pipe according to claim 1, wherein The baffle assembly includes a left front converging baffle and a plurality of J-shaped left decelerating baffles that are sequentially connected end to end on the left side of the pipe body, a right front converging baffle and a plurality of J-shaped right decelerating baffles that are sequentially connected end to end on the right side of the pipe body, and a plurality of inclined baffles located between the J-shaped left decelerating baffles and the J-shaped right decelerating baffles; the left front converging baffle, the J-shaped left decelerating baffles, the right front converging baffle, the J-shaped right decelerating baffles and the inclined baffles are all fixedly connected to the pipe body.

3. The Tesla valve type temperature-controlled drip water pipe according to claim 2, characterized in that, The baffle assembly further includes a left rear converging baffle located on the left side of the pipe body and connected to the J-shaped left decelerating baffle at the end, and a right rear converging baffle located on the right side of the pipe body and connected to the J-shaped right decelerating baffle at the end.

4. The Tesla valve type temperature-controlled drip water pipe according to claim 2, characterized in that, Adjacent inclined baffles are arranged in a staggered manner along the water flow direction.

5. The Tesla valve type temperature-controlled drip water pipe according to claim 1, characterized in that, Two exhaust hole columns and seven water outlet holes are provided at the rear end of the pipe body.

6. The Tesla valve type temperature-controlled drip water pipe according to claim 5, characterized in that, The two exhaust hole columns are respectively located at the front end and the rear end of the seven water outlet holes, and the exhaust hole column located at the front end of the seven water outlet holes is used to divide the water flow flowing through the rear end of the baffle assembly.

7. An instant drip coffee maker, characterized in that, It includes the Tesla valve type temperature control drip water pipe according to any one of claims 1-6.

8. The instant drip coffee maker according to claim 7, wherein, It further includes a frame, a heater arranged inside the frame, a water storage tank arranged on the top of the frame, a connecting pipe arranged on the water outlet of the heater and used to convey hot water to the pipe body, and a brewing basket arranged on the frame and used to receive the water droplets flowing out from the water outlet holes; the top end of the connecting pipe is communicated with the water inlet of the pipe body, and its bottom end is communicated with the water outlet of the heater; the water storage tank is communicated with the heater through a one-way valve conduit.

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