Water level detection device and coffee machine

Abstract

The utility model relates to the technical field of coffee machines, and discloses a water level detection device and a coffee machine, the water level detection device comprises a shell, the shell is installed at the bottom of an inner cavity of a container, an installation cavity is arranged in the shell, and the installation cavity is communicated with the inner cavity so that water in the inner cavity can flow into the installation cavity; a floating assembly which floats up and down depending on the water level is arranged in the mounting cavity, a magnetic part is arranged on the floating assembly, and a magnetic sensing element for sensing the magnetic part is arranged at the outer bottom of the container; when the floating assembly drives the magnetic part to descend to be lower than the preset position, the magnetic induction element and the magnetic part conduct induction. The water level detection device and the coffee machine are simple in structure and low in production cost; when the detection device is used, impurities are not easily generated when the floating assembly floats, the water quality is not easily influenced, the detection device is safe and reliable to use, the floating assembly floats smoothly and is not easily stuck, and the detection device is mounted at the inner bottom of the water tank, does not occupy the external space of the water tank and is good in use experience.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, and in particular to a water level detection device and a coffee machine. Background Art

[0002] With the improvement of living standards, the use of coffee machines is becoming more and more common and intelligent. They can not only realize the basic function of brewing coffee, but also have more humanized functions such as automatic temperature setting and usage setting. Existing coffee machines use a (two-in-one) water pump to achieve accurate brewed coffee volume. During the entire process of brewing coffee, the actual temperature of the heating element and the NTC (temperature sensor) in the water circuit will be combined to shut down the coffee machine through the program. Due to the sensitivity retention of the NTC on the heating tube and the inaccurate temperature measurement caused by the different sizes of the water flow through the NTC of the water pipe, it is easy to make a misjudgment at this time, resulting in failure to brew coffee normally. Especially when the water tank is empty, there will be a lot of steam and it will last for a long time, and consumers cannot refill their cups: they often have to refill the water and reprogram the coffee, which is too cumbersome and causes inaccurate coffee flow.

[0003] Some existing coffee machines are equipped with water level detection devices to remind users to add water in time when the water level of the coffee machine is low, so as to avoid the above-mentioned problems such as large steam and the need for reprogramming caused by untimely water addition. Some existing coffee machine water level detection devices include a float and a guide rail. The float slides on the guide rail in the vertical direction, and the float is driven to slide up and down by the water level. This structure requires matching guide rails and other parts, which is complex and has high production costs. In addition, when used, the float and the guide rail slide and wear, which is easy to produce impurities, which can easily affect the water quality and easily produce scale, causing the float to slide and get stuck, affecting the normal service life of the float. In addition, such detection devices are usually installed above the water tank, occupying a large space. Utility Model Content

[0004] In order to solve at least one aspect of the above problems, the utility model provides a water level detection device for detecting the water level in a container, comprising: a shell, the shell is installed at the bottom of the inner cavity of the container, an installation cavity is arranged in the shell, the installation cavity is communicated with the inner cavity, so that the water in the inner cavity flows into the installation cavity, a floating component that floats up and down depending on the water level is arranged in the installation cavity, a magnetic component is arranged on the floating component, and a magnetic sensing element for sensing the magnetic component is arranged at the outer bottom of the container; when the floating component drives the magnetic component to drop below a preset position, the magnetic sensing element senses the magnetic component; when the floating component drives the magnetic component to float above the preset position, the magnetic sensing element disconnects the sensing from the magnetic component; the water level detection device of the utility model has a simple structure and low production cost; and when the floating component floats in use, it is not easy to generate impurities, it is not easy to affect the water quality, it is safe and reliable to use, the floating component floats smoothly and is not easy to stick, and the detection device is installed at the inner bottom of the water tank, does not occupy the external space of the water tank, and has a good use experience.

[0005] Optionally, a cavity is provided in the floating assembly.

[0006] Optionally, the floating assembly includes a first floating member and a second floating member spliced ​​together, and the cavity is formed between the first floating member and the second floating member.

[0007] Optionally, the first floating member is installed on the upper part of the second floating member, the second floating member is provided with a mounting groove for mounting the magnetic member, and the first floating member is provided with a positioning column for positioning the magnetic member.

[0008] Optionally, an upper plane is provided on the upper side of the floating component, and an arc-shaped convex surface is provided on the lower side of the floating component.

[0009] Optionally, a positioning plane is provided at the bottom of the arc-shaped convex surface.

[0010] Optionally, an upper cavity wall of the installation cavity is provided with a concave arc surface.

[0011] Optionally, a plurality of communication holes are provided on the shell, and the installation cavity is connected with the inner cavity through the communication holes.

[0012] Optionally, the magnetic member is a magnet, and the magnetic sensing element is a reed switch or a Hall element.

[0013] Compared with the prior art, the water level detection device of the utility model has a simple structure and low production cost. When the floating component is in use, it is not easy to generate impurities and affect the water quality. It is safe and reliable to use. The floating component floats smoothly and is not easy to stick. In addition, the detection device is installed at the inner bottom of the water tank, does not occupy the external space of the water tank, and has a good user experience. The bottom of the arc-shaped convex surface is provided with a positioning plane, so that the floating component can be positioned in a horizontal upright state when there is no water in the inner cavity or when it is about to be filled with water, so as to avoid tipping over when there is no water or when it is about to be filled with water, which affects the sensing accuracy. The lower side of the floating component is provided with an arc-shaped convex surface. The convex surface is hemispherical or quasi-hemispherical. Under the same space or conditions, the hemispherical form has a larger surface area in contact with the water, and the upward buoyancy generated is greater, so that the floating component floats sensitively and the sensing is reliable; the arc surface is provided to reduce the contact area between the upper plane and the upper cavity wall, thereby reducing the viscosity of the water, avoiding the floating component from sticking to the upper cavity wall and being unable to fall for sensing, thereby improving the reliability of use; the magnetic sensing element is a reed switch or a Hall element. In this embodiment, the magnetic sensing element is a reed switch. The reed switch has the advantages of small size, long life, fast sensing speed, and low cost.

[0014] In addition, the utility model also provides a coffee machine, including the above-mentioned water level detection device, and also including a machine body, the container is a coffee machine water tank, the container is arranged on the machine body, a control board is arranged on the machine body, and the magnetic sensing element is electrically connected to the control board; this coffee machine also has the beneficial effects of the water level detection device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the coffee machine of the utility model;

[0016] Figure 2 It is a cross-sectional view of the coffee machine of the utility model;

[0017] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0018] Figure 4 It is a structural schematic diagram of the housing of the utility model;

[0019] Figure 5 It is an exploded view of the floating component part of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the arc-shaped convex surface of the utility model;

[0021] The corresponding component names of the various figure marks in the figure are: 1 is a container, 101 is an inner cavity, 2 is a shell, 21 is a mounting cavity, 211 is an arc surface, 22 is a connecting hole, 3 is a floating component, 301 is a cavity, 302 is an upper plane, 303 is an arc convex surface, 3031 is a positioning plane, 31 is a first floating part, 311 is a positioning column, 32 is a second floating part, 321 is a mounting groove, 4 is a magnetic part, 5 is a sensing element, and 10 is a body. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0025] See also Figure 1-Figure 6 The utility model provides a water level detection device for detecting the water level in a container 1, comprising: a shell 2, an opening is arranged at the lower end of the shell 2, the shell 2 is installed at the bottom of an inner cavity 101 of the container 1, the inner cavity 101 is used to store water, the water level detection device is used to detect the water level in the inner cavity 101, an installation cavity 21 is arranged in the shell 2, the installation cavity 21 is communicated with the inner cavity 101, so that the water in the inner cavity 101 can flow into the installation cavity 21, a floating component 3 is arranged in the installation cavity 21 for floating up and down by the buoyancy of the water level, a magnetic component 4 is arranged on the floating component 3, and a magnetic sensing element 5 for sensing the magnetic component 4 is arranged at the outer bottom of the container 1; when the floating component 3 drives the magnetic component 4 to drop below a preset position, the preset position may be When the water level in the inner cavity 101 is insufficient, the distance between the magnetic sensing element 5 and the magnetic part 4 is relatively close, thereby sensing. At this time, the magnetic sensing element 5 generates an electrical signal of a low water level; when the floating component 3 drives the magnetic part 4 to float to a position higher than the preset position, the magnetic sensing element 5 is disconnected from the magnetic part 4, and the electrical signal of the low water level of the magnetic sensing element 5 disappears, thereby judging a signal of a high water level or a normal water level; the water level detection device of the utility model has a simple structure and a low production cost; and when the floating component floats during use, it is not easy to generate impurities, and it is not easy to affect the water quality. It is safe and reliable to use, the floating component floats smoothly and is not easy to stick, and the detection device is installed at the inner bottom of the water tank, does not occupy the external space of the water tank, saves space, and has a good user experience.

[0026] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 , a cavity 301 is provided in the floating component 3 to increase the buoyancy and float sensitively; the floating component 3 includes a first floating member 31 and a second floating member 32 spliced ​​together, and the cavity 301 is formed between the first floating member 31 and the second floating member 32. In this embodiment, the first floating member 31 and the second floating member 32 are both made of PP plastic, and the two are fixed by ultrasonic welding, or by adhesive sealant and the like; the first floating member 31 is installed on the upper part of the second floating member 32, and the second floating member 32 is provided with an installation groove 321 for installing the magnetic member 4, and the first floating member 31 is provided with a mounting groove 321 for installing the magnetic member 4. A positioning column 311 is provided for positioning the magnetic component 4, and the lower end of the positioning column 311 is against the upper end of the magnetic component 4 for limiting. The magnetic component 4 is firmly installed and not easily displaced, thereby improving the reliability and stability of the sensing. An upper plane 302 is provided on the upper side of the floating component 3, and the upper plane 302 is parallel to the horizontal plane. An arc-shaped convex surface 303 is provided on the lower side of the floating component 3, and the arc-shaped convex surface 303 is hemispherical or quasi-hemispherical. Under the same space or conditions, the surface area of ​​the hemispherical form in contact with the water is larger, and the upward buoyancy generated is greater, so that the floating component 3 floats sensitively and the sensing is reliable.

[0027] See also Figure 2 , Figure 3 and Figure 6 A positioning plane 3031 is provided at the bottom of the arc-shaped convex surface 303, so that the floating component 3 can be positioned in a horizontal upright state (that is, the upper plane 302 is parallel to the horizontal plane) when there is no water or is about to be submerged in the inner cavity 101, to avoid tipping over when there is no water or is about to be submerged in water, thereby affecting the sensing accuracy; a concave arc-shaped surface 211 is provided on the upper cavity wall of the installation cavity 21. When there is little water and the water level is lower than the upper cavity wall, the water has a certain viscosity, causing the floating component to stick to the upper cavity wall and unable to fall for sensing; the purpose of setting the arc-shaped surface 211 is to reduce the contact area between the upper plane 302 and the upper cavity wall, thereby reducing the viscosity of water, avoiding the floating component from sticking to the upper cavity wall and unable to fall for sensing, and improving the reliability of use.

[0028] See also Figure 2-Figure 4 A plurality of connecting holes 22 are provided on the upper wall and the side wall of the shell 2. The installation cavity 21 is connected with the inner cavity 101 through the connecting holes 22, so that the water in the inner cavity 101 can enter the installation cavity 21, so that the floating assembly can float according to the water level in the inner cavity 101, thereby realizing the function of water level detection, and the structural design is reasonable.

[0029] See also Figure 2 and Figure 3The magnetic member 4 is a magnet or other material that can be sensed by the magnetic sensing element 5. The magnetic sensing element 5 is a reed switch or a Hall element. In this embodiment, the magnetic sensing element 5 is a reed switch. The reed switch has the advantages of small size, long life, fast sensing speed, and low cost.

[0030] The utility model has a simple structure and low production cost. When the floating component floats during use, it is not easy to generate impurities and affect the water quality. It is safe and reliable to use. The floating component floats smoothly and is not easy to stick. The detection device is installed at the inner bottom of the water tank, does not occupy the external space of the water tank, and has a good user experience. The bottom of the arc-shaped convex surface is provided with a positioning plane, so that the floating component can be positioned in a horizontal upright state when there is no water in the inner cavity or when it is about to be full of water, so as to avoid tipping over when there is no water or when it is about to be full of water, which affects the sensing accuracy. The lower side of the floating component is provided with an arc-shaped convex surface, and the arc-shaped convex surface is Hemispherical or quasi-hemispherical shape, in the same space or conditions, the hemispherical form has a larger surface area in contact with the water, and the upward buoyancy generated is greater, so that the floating component floats sensitively and the sensing is reliable; the provision of an arc surface can reduce the contact area between the upper plane and the upper cavity wall, thereby reducing the viscosity of the water, preventing the floating component from sticking to the upper cavity wall and being unable to fall for sensing, thereby improving reliability in use; the magnetic sensing element is a reed switch or a Hall element. In this embodiment, the magnetic sensing element is a reed switch, which has the advantages of small size, long life, fast sensing speed, and low cost.

[0031] In addition, see Figure 1-Figure 3 The utility model also provides a coffee machine, including the above-mentioned water level detection device, and also includes a machine body 10, a magnetic sensing element 5 is arranged on the machine body 10, a container 1 is a water tank of the coffee machine, the container 1 is arranged on the machine body 10, a control board is arranged on the machine body 10, the magnetic sensing element 5 is electrically connected to the control board (not shown), and a low water level alarm message is transmitted to the user through the indicator light, screen, prompt sound and other means on the machine body to prompt the user to add water in time. After adding water, the coffee machine works normally; this coffee machine also has the beneficial effects of the water level detection device, which will not be repeated here.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A water level detection device for detecting the water level in a container (1), characterized in that: include: A shell (2), the shell (2) being mounted on the bottom of the inner cavity (101) of the container (1), the shell (2) being provided with an installation cavity (21), the installation cavity (21) being communicated with the inner cavity (101) so that water in the inner cavity (101) flows into the installation cavity (21), the installation cavity (21) being provided with a floating component (3) floating up and down depending on the water level, the floating component (3) being provided with a magnetic component (4), and the outer bottom of the container (1) being provided with a magnetic sensing element (5) for sensing the magnetic component (4); when the floating component (3) drives the magnetic component (4) to descend to below a preset position, the magnetic sensing element (5) senses the magnetic component (4); when the floating component (3) drives the magnetic component (4) to float to above the preset position, the magnetic sensing element (5) disconnects the sensing from the magnetic component (4).

2. The water level detection device according to claim 1, characterized in that: A cavity (301) is provided in the floating assembly (3).

3. The water level detection device according to claim 2, characterized in that: The floating assembly (3) comprises a first floating member (31) and a second floating member (32) which are spliced ​​together, and the cavity (301) is formed between the first floating member (31) and the second floating member (32).

4. The water level detection device according to claim 3, characterized in that: The first floating member (31) is installed on the upper part of the second floating member (32), the second floating member (32) is provided with a mounting groove (321) for mounting the magnetic member (4), and the first floating member (31) is provided with a positioning column (311) for positioning the magnetic member (4).

5. The water level detection device according to claim 1, characterized in that: An upper plane (302) is provided on the upper side of the floating component (3), and an arc-shaped convex surface (303) is provided on the lower side of the floating component (3).

6. The water level detection device according to claim 5, characterized in that: A positioning plane (3031) is provided at the bottom of the arc-shaped convex surface (303).

7. The water level detection device according to claim 1, characterized in that: The upper cavity wall of the installation cavity (21) is provided with a concave arc surface (211).

8. The water level detection device according to claim 1, characterized in that: The shell (2) is provided with a plurality of communication holes (22), and the installation cavity (21) is connected to the inner cavity (101) through the communication holes (22).

9. The water level detection device according to claim 1, characterized in that: The magnetic member (4) is a magnet, and the magnetic sensing element (5) is a reed switch or a Hall element.

10. A coffee machine, characterized in that: It comprises a water level detection device as described in any one of claims 1 to 9, and also comprises a body (10), the container (1) is a water tank of a coffee machine, the container (1) is arranged on the body (10), a control board is arranged on the body (10), and the magnetic sensing element (5) is electrically connected to the control board.

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