A water boiler and coffee maker

Abstract

The utility model discloses a hot water boiler and coffee machine, the hot water boiler includes boiler body and heating device, and boiler body is set up in the tubular shape, and has the accommodation cavity in boiler body, heating device is located in the accommodation cavity, and heating device to the bottom of the accommodation cavity extends to the first height of the accommodation cavity to the top, and the first height place will the accommodation cavity divide into upper chamber and lower chamber, and the volume ratio of upper chamber with lower chamber is A, 0.4<=A<=0.6, and heating device does not contact with the bottom of the accommodation cavity.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a hot water boiler and a coffee machine. Background Technology

[0002] In coffee-making devices, internal or external water sources can be used to provide the water needed to produce coffee. The coffee machine has an internal brewing unit where hot water is supplied. In this unit, the hot water passes through the coffee grounds to brew the coffee. The hot water boiler is one of the core components of the coffee machine, its main function being to provide a stable supply of steam and hot water, which directly affects the quality and efficiency of coffee production.

[0003] Currently available hot water boilers have heating elements positioned too low, resulting in uneven heating inside the boiler, with lower temperatures in the center and higher temperatures at the bottom and ends. This leads to temperature discontinuities when water is continuously flowing out.

[0004] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main purpose of this utility model is to provide a hot water boiler and a coffee machine, which aims to solve the above-mentioned technical problems in the prior art.

[0006] To achieve the above objectives, this utility model provides a hot water boiler, the hot water boiler comprising:

[0007] The boiler body is cylindrical in shape and has a receiving cavity inside.

[0008] A heating device is disposed within the receiving cavity, and the heating device extends from the bottom of the receiving cavity toward the top to a first height of the receiving cavity. At the first height, the receiving cavity is divided into an upper cavity and a lower cavity. The volume ratio of the upper cavity to the lower cavity is A, where 0.4 ≤ A ≤ 0.6, and the heating device does not contact the bottom of the receiving cavity.

[0009] Preferably, in the hot water boiler, A is 0.5.

[0010] Preferably, in the hot water boiler, the heating device is a heating wire.

[0011] Preferably, in the hot water boiler, the heating wire is coiled along the height direction of the receiving cavity, and the heating wires coiled along the height direction of the receiving cavity are arranged at intervals.

[0012] Preferably, in the hot water boiler, a first liquid outlet structure is installed on the top of the boiler body. The first liquid outlet structure includes a first liquid outlet pipe, which extends from the outside of the receiving cavity to the inside of the receiving cavity and is positioned below the liquid level inside the receiving cavity.

[0013] Preferably, in the hot water boiler, the bottom of the boiler body is provided with a water inlet structure, the water inlet structure includes a water inlet pipe and a stop structure, one end of the water inlet pipe is located outside the receiving cavity, and the other end extends into the receiving cavity; the stop structure is located at the other end of the water inlet pipe and at the lower end of the heating device.

[0014] Preferably, in the hot water boiler, the stop structure is an umbrella-shaped structure, the umbrella-shaped structure having an inner conical surface facing the water inlet pipe, the surface of the inner conical surface being gradually tapered from the water inlet pipe toward the direction near the heating device.

[0015] Preferably, in the hot water boiler, the outer edge of the inner conical surface near the inlet pipe is larger than the inner diameter of the inlet pipe.

[0016] Preferably, in the hot water boiler, a second liquid outlet structure is installed on the top of the boiler body. The second liquid outlet structure includes a second liquid outlet pipe, one end of which is exposed outside the mounting cavity, and the other end is installed on the top of the boiler body and does not extend into the mounting cavity.

[0017] To achieve the above objectives, this utility model provides a coffee machine, which includes the aforementioned hot water boiler.

[0018] This utility model has at least the following beneficial effects:

[0019] The hot water boiler provided by this utility model extends the heating device from the bottom to the top of the receiving cavity to a first height of the receiving cavity. At the first height, the receiving cavity is divided into an upper cavity and a lower cavity. The volume ratio of the upper cavity to the lower cavity is A, where 0.4 ≤ A ≤ 0.6. This allows the heating device to heat more evenly, with more uniform heat distribution and better stability. Attached Figure Description

[0020] Figure 1 A schematic diagram of the hot water boiler provided by this utility model;

[0021] Figure 2 for Figure 1 Exploded view of a medium-temperature hot water boiler;

[0022] Figure 3 for Figure 1 A sectional view.

[0023] 100-Hot water boiler, 1-Boiler body, 11-Containing cavity, 2-Heating device, 3-First liquid outlet structure, 4-Water inlet structure, 41-Water inlet pipe, 42-Stop structure, 5-Second liquid outlet structure.

[0024] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] In this embodiment of the invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with and referenced by each other without contradiction.

[0031] Currently available hot water boilers have heating elements positioned too low, resulting in uneven heating inside the boiler. The temperature is low in the center and high at the bottom and ends. This leads to temperature discontinuities when water is continuously flowing out. When heating and water flow are continuous, the top temperature is very high, while the middle area remains very cold, with a temperature difference of 20-30℃ between the top and middle areas. This makes control difficult, as it's impossible to determine the optimal starting point for heating.

[0032] Furthermore, since heat rises, the top and bottom temperatures become very high, while the middle area remains cool. During water dispensing, after the hot water from the top has dispensed, the cooler water from the middle rises, while the water from the bottom moves to the middle area. Because heating is slower at this point, the temperature in the middle area also decreases.

[0033] Therefore, this utility model provides a hot water boiler, please refer to [link / reference]. Figures 1 to 3 The hot water boiler 100 includes a boiler body 1 and a heating device 2. The boiler body 1 is cylindrical and has a receiving cavity 11 inside. The heating device 2 is disposed in the receiving cavity 11 and extends from the bottom to the top of the receiving cavity 11 to a first height of the receiving cavity 11. At the first height, the receiving cavity 11 is divided into an upper cavity and a lower cavity. The volume ratio of the upper cavity to the lower cavity is A, where 0.4 ≤ A ≤ 0.6, and the heating device 2 does not contact the bottom of the receiving cavity 11.

[0034] This invention extends the heating device 2 from the bottom to the top of the receiving cavity 11 to a first height, dividing the receiving cavity 11 into an upper cavity and a lower cavity at the first height. The volume ratio of the upper cavity to the lower cavity is A, where 0.4 ≤ A ≤ 0.6. This allows the heating device 2 to heat more evenly, resulting in more uniform heat distribution and better stability. In some other embodiments, A is 0.5, meaning the ratio of the volume above the heating device 2 to the volume below it is 1:2.

[0035] It should be noted that since heat rises, the top temperature will be higher. If the heating device 2 extends too high, the temperature near the top will become even higher; conversely, if the heating device 2 extends too low, the internal heating will be uneven, with a low temperature in the middle and high temperatures at the bottom and ends. This can lead to temperature discontinuities when water is continuously flowing out. Therefore, in this embodiment, 0.4 ≤ A ≤ 0.6, ensuring sufficient space above the heating device 2 while achieving more uniform heating. Ensuring sufficient space above the heating device 2 provides a buffer space at the top of the receiving cavity 11, preventing the top of the receiving cavity 11 from becoming too hot.

[0036] In some embodiments, the heating device 2 is a heating wire. The heating wire is coiled along the height direction of the receiving cavity 11, and the coiled heating wires along the height direction of the receiving cavity 11 are spaced apart. While ensuring heating effect, the larger the gap between the heating wires as they extend along the height direction of the receiving cavity 11, the better, as this can further make the heating more uniform. Furthermore, compared to the uneven heat distribution caused by the heating wires being arranged laterally, which can lead to excessively high temperatures at the top and bottom of the heating wires, this invention coils the heating wires along the height direction of the receiving cavity 11 (i.e., vertically), resulting in more uniform heating.

[0037] In some embodiments, a first liquid outlet structure 3 is installed on the top of the boiler body 1. The first liquid outlet structure 3 includes a first liquid outlet pipe, which extends from the outside of the receiving cavity 11 to the inside of the receiving cavity 11 and is positioned below the liquid surface inside the receiving cavity 11. During normal coffee making, the hot water in the hot water boiler 100 should pass through the coffee grounds under a stable pressure (typically 9-10 bar for espresso machines) to achieve uniform extraction. If gas (such as steam or air) is mixed in, the water flow will be disturbed by the gas, creating "air resistance" or "bubble impact," resulting in uneven water distribution. Furthermore, after gas mixes with the liquid, it will form tiny bubbles in the coffee liquid, causing the final coffee texture to become "loose" and lacking in body. Therefore, the first liquid outlet pipe needs to be located below the liquid surface inside the receiving cavity 11.

[0038] Of course, the hot water boiler 100 can also be used for other purposes, that is, in addition to discharging water used for making coffee, it can also be used to discharge water for other purposes. Specifically, a second liquid outlet structure 5 is installed on the top of the boiler body 1. The second liquid outlet structure 5 includes a second liquid outlet pipe. One end of the second liquid outlet pipe is exposed outside the mounting cavity, and the other end is installed on the top of the boiler body 1 and does not extend into the mounting cavity, thus facilitating the discharge of water other than that used for coffee.

[0039] The boiler body 1 has a water inlet structure 4 at its bottom. Liquid (e.g., water) enters the receiving cavity 11 through the water inlet structure 4. Because the liquid enters directly through the water inlet structure 4, it will rush onto the heating device 2, causing the heating device 2 to become extremely cold or hot, resulting in bubbles or even cracking, affecting its service life. In some embodiments, the water inlet structure 4 also includes a stop structure 42. One end of the water inlet pipe 41 is located outside the receiving cavity 11, and the other end extends into the receiving cavity 11; the stop structure 42 is located at the other end of the water inlet pipe 41 and at the lower end of the heating device 2.

[0040] The stop structure 42 can be a plate-like structure or other shapes, as long as it can prevent liquid entering from the water inlet pipe 41 from directly impacting the heating structure. In some embodiments, the stop structure 42 is an umbrella-shaped structure with an inner conical surface facing the water inlet pipe 41. The surface of the inner conical surface gradually tapers from the water inlet pipe 41 towards the heating device 2. Specifically, the outer edge of the inner conical surface near the water inlet pipe 41 is larger than the inner diameter of the water inlet pipe 41. After the liquid enters the receiving cavity 11 from the water inlet pipe 41, it rushes onto the inner conical surface of the umbrella-shaped structure and flows down along it. The umbrella structure provides a slow flow of water, preventing localized accumulation of hot and cold water, which could lead to uneven heating.

[0041] This utility model also provides a coffee machine that includes the aforementioned hot water boiler 100. The coffee machine includes an embodiment of the aforementioned hot water boiler 100, and the beneficial effects of the aforementioned hot water boiler 100 can be applied to the coffee machine.

[0042] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A hot water boiler, characterized in that, include: The boiler body is cylindrical in shape and has a receiving cavity inside. A heating device is disposed within the receiving cavity, and the heating device extends from the bottom of the receiving cavity toward the top to a first height of the receiving cavity. At the first height, the receiving cavity is divided into an upper cavity and a lower cavity. The volume ratio of the upper cavity to the lower cavity is A, where 0.4 ≤ A ≤ 0.6, and the heating device does not contact the bottom of the receiving cavity.

2. The hot water boiler as described in claim 1, characterized in that, The value of A is 0.

5.

3. The hot water boiler as described in claim 1, characterized in that, The heating device is a heating wire.

4. The hot water boiler as described in claim 3, characterized in that, The heating wire is coiled along the height direction of the receiving cavity, and the heating wires coiled along the height direction of the receiving cavity are arranged at intervals.

5. The hot water boiler as described in claim 1, characterized in that, The top of the boiler body is equipped with a first liquid outlet structure, which includes a first liquid outlet pipe. The first liquid outlet pipe extends from the outside of the receiving cavity to the inside of the receiving cavity and is positioned below the liquid level inside the receiving cavity.

6. The hot water boiler as described in claim 1, characterized in that, The bottom of the boiler body is provided with a water inlet structure, which includes a water inlet pipe and a stop structure. One end of the water inlet pipe is located outside the receiving cavity, and the other end extends into the receiving cavity. The stop structure is located at the other end of the water inlet pipe and at the lower end of the heating device.

7. The hot water boiler as described in claim 6, characterized in that, The stop structure is an umbrella-shaped structure with an inner conical surface facing the water inlet pipe. The surface of the inner conical surface gradually tapers from the water inlet pipe toward the heating device.

8. The hot water boiler as described in claim 7, characterized in that, The inner conical surface near the outer edge of the water inlet pipe is larger than the inner diameter of the water inlet pipe.

9. The hot water boiler as described in claim 1, characterized in that, A second liquid outlet structure is installed on the top of the boiler body. The second liquid outlet structure includes a second liquid outlet pipe. One end of the second liquid outlet pipe is exposed outside the mounting cavity, and the other end is installed on the top of the boiler body and does not extend into the mounting cavity.

10. A coffee machine, characterized in that, Including the hot water boiler as described in any one of claims 1 to 9.

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