Liquid level detection device for non-transparent inner container

Abstract

The utility model belongs to the technical field of milk brewing devices, and particularly relates to a liquid level detection device of a non-transparent inner container, which comprises an inner container, a water suction pump, a normally closed air valve, a tee joint and a liquid level indicator. A liquid level pipe is arranged on the outer wall of the inner container, and a floater with a magnet is arranged in the liquid level pipe; a Hall recognition plate with recognition points is fixed to the outer wall of the liquid level pipe, and the floater can be detected by the Hall recognition plate. The upper end of the liquid level pipe communicates with the atmospheric environment through a normally-closed air valve. Three connectors of the tee joint are connected with a water outlet in the bottom of the inner container, a water inlet of the water suction pump and the lower end of the liquid level pipe respectively. The liquid level indicator is used for detecting the liquid level condition in the inner container. The liquid level detection device is suitable for liquid level detection of stainless steel and other non-transparent material inner containers, so that the milk brewing device can adopt the stainless steel inner container and has the advantages of being lighter, not prone to breakage, capable of meeting the food grade better, higher in cooling speed after the cooling fan is additionally arranged and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of milk makers, and in particular relates to a liquid level detection device for an opaque inner container. Background Art

[0002] The removable inner tanks of milk makers on the market all use glass inner tanks, and the liquid level inside can be observed directly through the outer wall of the inner tank. However, existing milk makers with stainless steel inner tanks are integrated with the body and cannot be disassembled, which is extremely inconvenient to clean and difficult to observe the liquid level inside.

[0003] Therefore, it is necessary to design a liquid level detection device that can be applied to opaque liner. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the present invention provides a liquid level detection device for an opaque liner.

[0005] The technical solution adopted by the utility model is:

[0006] A liquid level detection device for an opaque inner liner, comprising an inner liner, a water pump, a normally closed air valve, a three-way valve and a liquid level indicator;

[0007] A liquid level tube is arranged on the outer wall of the inner container, a float is arranged in the liquid level tube, and a magnet is arranged in the float; a Hall recognition plate is fixed on the outer wall of the liquid level tube, and recognition points corresponding to the liquid level in the inner container are arranged at different height positions on the Hall recognition plate, and the float can be detected by the Hall recognition plate when it moves along the liquid level tube to different Hall recognition plates; the upper end of the liquid level tube is connected to the atmospheric environment through a normally closed air valve;

[0008] The three interfaces of the tee are respectively connected to the water outlet at the bottom of the inner tank, the water inlet of the water pump and the lower end of the liquid level pipe, and the water outlet of the water pump is connected to the water head;

[0009] The liquid level indicator is used to indicate the liquid level in the inner container.

[0010] As an alternative or supplement to the above-mentioned liquid level detection device: the inner tank is made of stainless steel.

[0011] As an alternative or supplement to the above-mentioned liquid level detection device: an outer cylinder is arranged outside the inner tank, and the inner tank is detachably assembled in the outer cylinder; a lifting joint is fixed at the center of the inner bottom of the outer cylinder, and a one-way valve is arranged at the center of the bottom of the inner tank, and a movable spherical valve core is arranged in the one-way valve; when the inner tank is placed in the outer cylinder, the upper end of the lifting joint pushes open the spherical valve core to open the one-way valve.

[0012] As an alternative or supplement to the above-mentioned liquid level detection device: the one-way valve includes an upper valve seat, a lower valve seat, a sliding seat and the spherical valve core; the upper valve seat is connected to the inner cavity of the inner tank, and the lower valve seat is connected to the lower part of the upper valve seat and has a water outlet channel; the sliding seat is slidably arranged in the upper valve seat and is resisted against the upper valve seat by a spring, and the sliding seat presses the spherical valve core onto the lower valve seat and blocks the upper end of the water outlet channel.

[0013] As an alternative or supplement to the above-mentioned liquid level detection device: the water outlet channel is stepped, and the upper end of the lifting joint can extend from the lower end of the water outlet channel and lift up the spherical valve core.

[0014] As an alternative or supplement to the above-mentioned liquid level detection device: a female coupler is fixed to the outer bottom of the inner tank, and a male coupler is fixed at the bottom center of the outer tube. The female coupler and the male coupler are coupled to each other to provide power for the heating of the inner tank and to output signals for the temperature sensing element of the inner tank.

[0015] As an alternative or supplement to the above-mentioned liquid level detection device: an upper cover is provided at the top opening of the outer cylinder.

[0016] As an alternative or supplement to the above-mentioned liquid level detection device: an outer shell is arranged outside the outer cylinder, and a normally closed air valve is arranged at the inner bottom of the outer shell. The normally closed air valve is connected to the upper end of the liquid level pipe through a hose.

[0017] The beneficial effects of the utility model are:

[0018] 1. The liquid level detection device of this scheme can be applied to the liquid level detection of the inner liner of opaque materials such as stainless steel, so that the milk maker can use the inner liner of the whole stainless steel material, which has the advantages of being lighter, not easy to break, more food grade, and having a faster cooling speed after adding a cooling fan.

[0019] 2. This solution allows you to understand the liquid level in the inner pot without opening the lid, which is more convenient and user-friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0021] Figure 1 This is the coordination structure diagram of the outer cylinder, liquid level pipe, water pump and three-way joint in this scheme;

[0022] Figure 2 is a cross-sectional structural diagram of the liquid level detection device of the opaque liner in this solution;

[0023] Figure 3It is the overall structure diagram of the liquid level detection device of the opaque liner in this scheme;

[0024] Figure 4 yes Figure 2 The structural diagram of the local A in the middle;

[0025] Figure 5 It is a structural diagram of the one-way valve at the bottom of the inner tank.

[0026] In the figure: 1-upper cover; 2-outer cylinder; 3-outer shell; 4-normally closed air valve; 5-Hall identification board; 6-liquid level tube; 7-water pump; 8-female coupler; 9-male coupler; 10-inner tank; 11-water head; 12-upper valve seat; 13-spring; 14-sliding seat; 15-lower valve seat; 16-lifting joint; 17-spherical valve core; 18-three-way joint; 19-main control board; 20-display board. DETAILED DESCRIPTION

[0027] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0028] Example 1

[0029] like Figures 1 to 5 As shown, this embodiment designs a liquid level detection device for an opaque inner liner, including an inner liner 10, a water pump 7, a normally closed air valve 4, a three-way valve, a liquid level indicator and other components.

[0030] The inner tank 10 can be a cylindrical structure made of stainless steel. A liquid level tube 6 is arranged on the outer wall of the inner tank 10, and the liquid level tube 6 is erected on the outer side of the inner tank 10. A float is arranged in the liquid level tube 6, and a magnet is arranged in the float. A Hall recognition plate 5 is fixed on the outer wall of the liquid level tube 6, and recognition points corresponding to the liquid level in the inner tank 10 are respectively arranged at different height positions on the Hall recognition plate 5. When the float moves along the liquid level tube 6 to different Hall recognition plates 5, it can be detected by the Hall recognition plate 5. The Hall recognition plate 5 and the liquid level indicator are associated through the main control board 19 such as EEPROM, so that when the float moves to different heights and is detected by different Hall recognition plates 5, the liquid level indicator displays corresponding to different liquid levels.

[0031] The upper end of the liquid level tube 6 is connected to the atmosphere through the normally closed air valve 4; the normally closed air valve 4 is connected to the upper end of the liquid level tube 6 through a hose, and the normally closed air valve 4 uses a solenoid valve; when the normally closed air valve 4 is powered on, the upper end of the liquid level tube 6 can be connected to the atmosphere; and when the normally closed air valve 4 is powered off and closed, the upper end of the liquid level tube 6 can be isolated from the atmosphere.

[0032] An outer shell 3 is disposed outside the outer cylinder 2 , and a normally closed gas valve 4 is disposed at the inner bottom of the outer shell 3 .

[0033] The three interfaces of the tee are respectively connected to the water outlet at the bottom of the inner tank 10 , the water inlet of the water pump 7 and the lower end of the liquid level pipe 6 , and the water outlet of the water pump 7 is connected to the water receiving head 11 .

[0034] An outer cylinder 2 is arranged outside the inner liner 10, and the inner liner 10 is detachably assembled in the outer cylinder 2; a lifting joint 16 is fixed at the center of the inner bottom of the outer cylinder 2, and a one-way valve is arranged at the center of the bottom of the inner liner, and a movable spherical valve core 17 is arranged in the one-way valve; when the inner liner is placed in the outer cylinder 2, the upper end of the lifting joint 16 pushes the spherical valve core 17 to open the one-way valve. The one-way valve includes an upper valve seat 12, a lower valve seat 15, a sliding seat 14 and the spherical valve core 17 and other components. The upper valve seat 12 is connected to the inner cavity of the inner liner 10, and the lower valve seat 15 is connected to the lower part of the upper valve seat 12 and has a water outlet channel, and the water outlet channel is stepped; the sliding seat 14 is slidably arranged in the upper valve seat 12 and is abutted against the upper valve seat 12 by a spring 13, and the sliding seat 14 presses the spherical valve core 17 onto the lower valve seat 15 and blocks the upper end of the water outlet channel.

[0035] When the inner container 10 is put into the outer tube 2, the upper end of the lifting joint 16 can extend from the lower end of the water outlet channel and lift up the ball valve core 17, so that the one-way valve is in an open state. At this time, the water in the inner container 10 can enter the three-way through the upper valve seat 12 and the lower valve seat 15, and then be pumped out to the water receiving head 11 by the water pump 7, so that the user can receive water at the water receiving head 11. When the inner container 10 is taken out of the outer tube 2, the lifting joint 16 is separated from the lower valve seat 15, and the sliding seat 14 moves downward under the elastic force of the spring 13 and presses the ball valve core 17 onto the lower valve seat 15, and the ball valve core 17 is used to block the upper end of the water outlet channel, thereby preventing the milk in the inner container 10 from leaking.

[0036] A female coupler 8 is fixed to the outer bottom of the inner tank 10, and a male coupler 9 is fixed to the bottom center of the outer tube 2. The female coupler 8 and the male coupler 9 are coupled to each other to provide power for the heating of the inner tank 10 and to output signals for the temperature sensing element of the inner tank 10.

[0037] The top opening of the outer cylinder 2 is covered with an upper cover 1 , so that the inner container 10 is protected from dust by the upper cover 1 .

[0038] After the stainless steel inner tank 10 is filled with water, the inner tank 10 is placed in the outer cylinder 2, and the female coupler 8 at the bottom cooperates with the male coupler 9 at the bottom of the milk maker, so that the heater at the bottom of the inner tank 10 heats the inner tank 10, thereby boiling the water. When the normally closed air valve 4 is opened, the upper end of the liquid level tube 6 is connected to the atmosphere, so that the milk in the inner tank 10 flows from the bottom of the inner tank 10 through the one-way valve to the three-way, and then enters the liquid level tube 6 through the three-way. Since a Hall recognition plate 5 is fixed on the side of the liquid level tube 6, there can be 3 recognition points on the Hall recognition plate 5, which are respectively corresponding to capacities of 0.25L, 0.5L, 1.0L, etc. The float placed inside the liquid level tube 6 can float up and down with the change of the liquid level in the liquid level tube 6. At the same time, since a magnet is installed inside the float, the float can be recognized when it passes through the Hall elements at the three recognition points. The Hall recognition board 5 transmits the recognized signal to the main control board 19 such as the EEPROM, so that the main control board 19 controls the liquid level indicator to display.

[0039] The specific working principle of the liquid level detection device in this embodiment is as follows:

[0040] 1. When the inner tank 10 is taken out and filled with water and then put back into the outer tube 2, the main control board 19 detects that the inner tank 10 has been put in, and supplies power to the normally closed air valve 4 for several seconds and then cuts off the power. During the period when the normally closed air valve 4 is open, the top of the liquid level tube 6 is connected to the atmospheric pressure. At this time, the inner tank 10 and the liquid level tube 6 are synchronized with the liquid level under the action of atmospheric pressure. When the liquid level in the liquid level tube 6 rises, the float floats up with the liquid level. After the identification point detects the float, it transmits a signal to the main control board 19, and the display board 20 displays the water volume;

[0041] 2. When the water pump 7 is used to discharge water to the water inlet, the water pump 7 is started and the normally closed air valve 4 is powered for several seconds and then powered off. During the period when the normally closed air valve 4 is open, the liquid level in the liquid level tube 6 is lowered by the suction force of the water pump 7; after the normally closed air valve 4 is powered off, the top of the liquid level tube 6 is immediately isolated from the atmospheric pressure, and the liquid level and the float in the liquid level tube 6 will remain stable. When the water pump 7 has finished discharging water, the normally closed air valve 4 is powered for several seconds and then powered off, so that the top of the liquid level tube 6 is connected to the atmospheric pressure for a certain period of time. The remaining water in the inner tank 10 will be synchronized with the liquid level tube 6 under the action of atmospheric pressure. If the float passes through different height identification points, the display board 20 will display different water volumes, that is: if the float passes through the highest identification point, the liquid level of the inner tank 10 is greater than 1.0L, and the display board 20 displays 3 grids of water; if the float passes through the next two identification points, the liquid level of the inner tank 10 is greater than 0.5L and less than 1.0L, and the display board 20 displays 2 grids of water; if the float only passes through the lowest identification point, the liquid level of the inner tank 10 is greater than 0.25L and less than 0.5L, and the display board 20 displays 1 grid of water; if the float does not pass through any identification point, the liquid level of the inner tank 10 is less than 0.25L. The display board 20 can flash to indicate that there is an impending lack of water;

[0042] 3. When the water level in the inner tank 10 is low, the upper cover 1 can be opened directly to add water to the inner tank 10 without removing the inner tank 10. At this time, when the main control board 19 detects that the water temperature inside the inner tank 10 changes suddenly, the main control board 19 controls the normally closed air valve 4 to supply power for several seconds and then cuts off the power. During the period when the normally closed air valve 4 is open, the inner tank 10 synchronizes the liquid level with the liquid level tube 6, and the float rises with the liquid level. When the liquid level of the inner tank 10 is greater than 0.25L and less than 0.5L, the float passes the lowest identification point, and the display board 20 displays 1 grid of water; when the liquid level of the inner tank 10 is greater than 0.5L and less than 1L, the float passes the middle identification point, and the display board 20 displays 2 grids of water; when the liquid level of the inner tank 10 is greater than 1L, the float passes the highest identification point, and the display board 20 displays 3 grids of water.

[0043] 4. The chip on the main control board 19 has an EEPROM. The liquid level data of the machine will be stored in the EEPROM of the chip. Even if the machine is unplugged from the power supply, it can still re-read and display the liquid level status before unplugging the power supply after powering on again. It will not be reset due to power failure of the machine.

[0044] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A liquid level detection device for an opaque liner, characterized in that: It includes an inner tank (10), a water pump (7), a normally closed air valve (4), a three-way valve and a liquid level indicator; A liquid level tube (6) is arranged on the outer wall of the inner container (10), a float is arranged in the liquid level tube (6), and a magnet is arranged in the float; a Hall recognition plate (5) is fixed on the outer wall of the liquid level tube (6), and recognition points corresponding to the liquid level in the inner container (10) are respectively arranged at different height positions on the Hall recognition plate (5), and when the float moves along the liquid level tube (6) to different Hall recognition plates (5), it can be detected by the Hall recognition plate (5); the upper end of the liquid level tube (6) is connected to the atmosphere through a normally closed air valve (4); The three interfaces of the tee are respectively connected to the water outlet at the bottom of the inner tank (10), the water inlet of the water pump (7) and the lower end of the liquid level pipe (6), and the water outlet of the water pump (7) is connected to a water receiving head (11); The liquid level indicator is used to indicate the liquid level in the inner container (10).

2. The liquid level detection device for an opaque liner according to claim 1, characterized in that: The inner container (10) is entirely made of stainless steel.

3. The liquid level detection device for an opaque liner according to claim 1, characterized in that: An outer cylinder (2) is arranged outside the inner liner (10), and the inner liner (10) can be detachably assembled in the outer cylinder (2); a lifting joint (16) is fixed at the center of the inner bottom of the outer cylinder (2), and a one-way valve is arranged at the center of the bottom of the inner liner, and a movable spherical valve core (17) is arranged in the one-way valve; when the inner liner is placed in the outer cylinder (2), the upper end of the lifting joint (16) pushes open the spherical valve core (17) to open the one-way valve.

4. The liquid level detection device for an opaque liner according to claim 3, characterized in that: The one-way valve comprises an upper valve seat (12), a lower valve seat (15), a sliding seat (14) and the spherical valve core (17); the upper valve seat (12) is communicated with the inner cavity of the inner tank (10); the lower valve seat (15) is connected to the lower part of the upper valve seat (12) and has a water outlet channel; the sliding seat (14) is slidably arranged in the upper valve seat (12) and is abutted against the upper valve seat (12) by a spring (13); the sliding seat (14) presses the spherical valve core (17) onto the lower valve seat (15) and blocks the upper end of the water outlet channel.

5. The liquid level detection device for an opaque liner according to claim 4, characterized in that: The water outlet channel is in a step shape, and the upper end of the lifting joint (16) can extend into the lower end of the water outlet channel and lift up the spherical valve core (17).

6. The liquid level detection device for an opaque liner according to any one of claims 3 to 5, characterized in that: A female coupler (8) is fixed to the outer bottom of the inner liner (10), and a male coupler (9) is fixed to the bottom center of the outer tube (2). The female coupler (8) and the male coupler (9) are coupled to each other to supply power for the heating of the inner liner (10) and to provide heat for the inner liner (10). The temperature sensing element outputs the signal.

7. The liquid level detection device for an opaque liner according to claim 6, characterized in that: The top opening of the outer cylinder (2) is covered with an upper cover (1).

8. The liquid level detection device for an opaque liner according to claim 6, characterized in that: An outer shell (3) is arranged outside the outer cylinder (2), and a normally closed air valve (4) is arranged at the inner bottom of the outer shell (3). The normally closed air valve (4) is connected to the upper end of the liquid level pipe (6) through a hose.

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