A tea and coffee machine with a mechanical safety interlock device

Abstract

This utility model discloses a tea and coffee machine with a mechanical safety interlock device, relating to the field of tea and coffee machine technology. The machine includes a water tank at the rear, a pressing unit at the upper front of the machine's interior, a placement platform inserted at the front, and a base connected to the lower end. A water inlet pipe and a weight control unit are located above the rear end of the base, with the water inlet pipe connected to a water pump. The pressing unit has a liquid outlet pipe, and a pressing unit is installed on the outlet pipe. The weight control unit and the pressing unit are connected in series in a control circuit. This utility model uses a mechanical linkage structure between the weight control unit and the pressing unit to ensure that the power source is automatically cut off after the placement platform and water tank are installed, thus disabling the water pump. Both the weight control unit and the pressing unit are connected in series in the control circuit; when either the control circuit in the weight control unit or the control circuit in the pressing unit is disconnected, the water pump is stopped.

Description

Technical Field

[0001] This utility model relates to the field of tea and coffee machine technology, and in particular to a tea and coffee machine with a mechanical safety interlock device. Background Technology

[0002] As people's living standards improve, their demand for various beverages is becoming increasingly diversified, with tea, coffee, and other drinks becoming important parts of daily consumption. While current beverage preparation equipment, such as tea and coffee machines, can meet basic beverage preparation needs, there are still shortcomings in structural design and functional implementation. On the one hand, existing equipment has poor positioning and sealing of tea capsules, easily leading to liquid leakage during the tea extraction process. This not only wastes raw materials but also contaminates the internal structure of the equipment, increasing cleaning difficulty. On the other hand, most equipment can only provide water at a single temperature, unable to adjust the water temperature according to the preparation needs of different beverages (such as hot tea, iced coffee, and room-temperature herbal tea), resulting in significant functional limitations and failing to meet the diverse drinking needs of users.

[0003] Currently, during the use of existing tea and coffee machines, if the placement platform is not installed properly, the seal between the placement platform and the pressing unit is poor, which can easily cause the liquid extracted by the tea and coffee machine to leak into the machine and damage the internal parts. In addition, when the water tank of the tea and coffee machine is low on liquid, the water pump will continue to pump, causing direct friction damage to the internal metal parts of the pump. Utility Model Content

[0004] The purpose of this utility model is to provide a tea and coffee machine with a mechanical safety interlock device. The weight control unit and the top pressure unit can ensure that the control circuit is connected after the placement platform and water tank are installed in place, so that the water pump can work normally.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tea and coffee machine with a mechanical safety interlock device, comprising a tea and coffee machine, a water tank provided at the rear of the tea and coffee machine, a pressing unit provided at the upper front of the interior of the tea and coffee machine, a placement platform corresponding to the pressing unit inserted at the front of the tea and coffee machine, a base connected to the lower end of the tea and coffee machine, a water inlet pipe and a weight control unit provided above the rear end of the base, the water inlet pipe being connected to a water pump, and a water outlet pipe corresponding to the water inlet pipe being provided at the lower end of the water tank, wherein the water tank, after installation, contacts the weight control unit, so that the control circuit is in a connected state through the weight control unit; The pressing unit is equipped with a liquid outlet pipe, and a top pressing unit for controlling the on / off state of the control circuit is installed on the liquid outlet pipe. The weight control unit and the top pressing unit are connected in series on the control circuit.

[0006] Optionally, the weight control unit includes a positioning frame fixed on the base, a pressure member slidably installed inside the positioning frame, a first elastic member provided between the pressure member and the positioning frame, the control circuit being electrically connected to the water pump, a first control switch for controlling the on / off state of the control circuit being provided on the base, and a one-way open cavity below the pressure member, with a pressure block corresponding to the first control switch provided inside the cavity.

[0007] Optionally, the pressure member has grooves on both sides, and the inner wall of the positioning frame has first top blocks corresponding to the grooves on both sides, with the first top blocks sliding elastically on the positioning frame.

[0008] Optionally, mounting holes are provided on both sides of the inner wall of the positioning frame, and a positioning block is installed at the outer end of the mounting hole. A second elastic element is provided between the positioning block and the first top block, and the circumferential direction of the positioning block is threadedly connected to the mounting hole.

[0009] Optionally, the first top block is spherical, and the inner diameter of the mounting hole is smaller than the diameter of the first top block.

[0010] Optionally, the upper end of the liquid outlet tube is sealed, and a circular groove is formed between the upper end of the liquid outlet tube and the top spike, the diameter of the circular groove being equal to the diameter of the top cover.

[0011] Optionally, the top-pressing unit includes a control housing, a first top rod connected to one end of the control housing facing the placement platform, a slider slidably connected inside the control housing, a through hole in the vertical direction at one end of the slider, the rear end of the first top rod penetrating the control housing and fixedly connected to the slider, and a third elastic element connected between the slider and the inner wall of the control housing.

[0012] Optionally, a second push switch for controlling the on / off state of the control circuit is fixedly connected to the inner wall of the rear end of the control housing, and a second top block corresponding to the second push switch is fixedly connected to the rear end of the slider.

[0013] Optionally, the tea and coffee machine is equipped with a water pump, an instant heating element, an instant cooling element, and a room temperature heating element. The water inlet of the water pump is connected to the water tank through a pipe, and the water outlet of the water pump is connected to the instant heating element, the instant cooling element, and the room temperature heating element respectively. The outlets of the instant heating element, the instant cooling element, and the room temperature heating element are connected to the liquid outlet pipe of the tea and coffee machine respectively through pipes.

[0014] The technical effects and advantages of this utility model are as follows: 1. By using a mechanical linkage structure between the weight control unit and the top pressure unit, the power source is automatically cut off after the placement platform and water tank are installed in place, so that the water pump is in a non-working state. The weight control unit and the top pressure unit are connected in series on the control circuit. When either the control circuit in the weight control unit or the control circuit in the top pressure unit is not connected, the water pump is in a stopped state, achieving a double interlocking effect.

[0015] 2. The fit between the first top block and the groove can limit the position of the pressure piece, preventing the pressure piece from slowly rising when the overall weight of the water tank decreases; when the liquid in the water tank is insufficient, the pressure piece is reset by the first elastic element and prepared to move upward. After the pressure of the first top block is broken, the pressure piece moves upward quickly, causing the pressure block to separate from the first control switch, thus disconnecting the control circuit and preventing the pressure block and the first control switch from separating prematurely when there is a certain amount of liquid in the water tank. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the tea and coffee machine of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tea and coffee machine of this utility model; Figure 3 This is a schematic diagram of the structure of the water inlet pipe of this utility model; Figure 4 This is a schematic diagram of the liquid outlet pipe of this utility model; Figure 5 This is a cross-sectional structural diagram of the control housing of this utility model; Figure 6 This is a schematic diagram of the structure of the pressing component of this utility model; Figure 7 This is a cross-sectional structural diagram of the pressing component of this utility model; Figure 8 This is a schematic diagram of the structure of the positioning frame and the pressure member of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Tea and coffee machine; 2. Water tank; 3. Pressing unit; 4. Placement platform; 5. Base; 6. Liquid outlet pipe; 7. Control housing; 8. Control circuit; 11. Water pump; 12. Instant heating element; 13. Instant cooling element; 14. Room temperature heating element; 51. Positioning frame; 52. Pressing element; 53. Water inlet pipe; 54. First control switch; 55. First elastic element; 511. Mounting hole; 512. First top block; 513. Second elastic element; 514. Positioning block; 521. Pressing block; 522. Groove; 71. First top rod; 72. First top plate; 73. Slider; 74. Second push switch; 75. Third elastic element; 731. Through hole; 732. Second top block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-8 As shown, this utility model is a tea and coffee machine with a mechanical safety interlock device, including a tea and coffee machine 1, a water tank 2 is provided on the rear side of the tea and coffee machine 1, a pressing unit 3 is provided on the upper front side of the interior of the tea and coffee machine 1, a placement platform 4 corresponding to the pressing unit 3 is inserted into the front of the tea and coffee machine 1, a base 5 is connected to the lower end of the tea and coffee machine 1, and a water dispensing area is provided between the front end of the base 5 and the tea and coffee machine 1. The height of the water dispensing area is adapted to the height of a regular water cup, making it convenient to dispense beverages. The tea and coffee machine 1 is equipped with a water pump 11, an instant heating element 12, an instant cooling element 13, and a room temperature heating element 14. The water inlet of the water pump 11 is connected to the water tank 2 via a pipe, and the water outlet of the water pump 11 is connected to the instant heating element 12, the instant cooling element 13, and the room temperature heating element 14 respectively. The outlets of the instant heating element 12, the instant cooling element 13, and the room temperature heating element 14 are connected to the liquid outlet pipe 6 of the tea and coffee machine 1 via pipes respectively. The liquid outlet pipe 6 is connected to the pressing unit 3. The working process of the pressing unit 3 is to press down the pressing handle. The pressing handle, through a connecting rod, causes the pressing plate to limit the position of the tea capsule in the placement table 4, while ensuring the sealing between the pressing plate and the upper end of the tea capsule. The specific structure of the pressing unit 3 is a common linkage transmission, which is a known and common knowledge technology, and will not be described in detail again.

[0020] In the above scheme, water tank 2 is supplied with water to the water pipe by water pump 11. The water is pressurized and delivered to the multi-path segmented outflow by relying on the instant heating element 12 (instant heating), the instant cooling element 13 (heat dissipation / cooling) and the normal temperature heating element 14 to control the temperature. The flow rate can be independently adjusted to achieve a uniform immersion dynamic water flow mode.

[0021] A water inlet pipe 53 and a weight control unit are provided at the upper rear end of the base 5. The water inlet pipe 53 and the weight control unit are arranged front and rear. The water inlet pipe 53 is connected to the water pump 11. A water outlet pipe corresponding to the water inlet pipe 53 is provided at the lower end of the water tank 2. A one-way valve is provided in the water outlet pipe to prevent the liquid in the water tank 2 from flowing out. When the water pump 11 starts working, the suction force generated on the one-way valve on the water outlet pipe will open. A sealing ring is provided between the water inlet pipe 53 and the water outlet pipe to prevent liquid from leaking during the process of liquid passing between the water outlet pipe and the water inlet pipe 53. After installation, the water tank 2 is in contact with the weight control unit, so that the control circuit 8 is connected through the weight control unit.

[0022] In this embodiment, there are two water inlet pipes 53, and the weight control unit is located between the two water inlet pipes 53.

[0023] The weight control unit includes a positioning frame 51 fixed on the base 5. A pressure member 52 is slidably installed inside the positioning frame 51. A first elastic member 55 is provided between the pressure member 52 and the positioning frame 51. The first elastic member 55 is a spring. The control line 8 is electrically connected to the water pump 11. The control line 8 is used to control the operation or stop of the water pump 11. A first control switch 54 is provided on the base 5 for controlling the on and off of the control line 8. The pressure member 52 has a one-way open cavity below it. A pressure block 521 corresponding to the first control switch 54 is provided in the cavity.

[0024] In the above scheme, the water tank 2 is inserted into the installation area of ​​the tea and coffee machine 1 from top to bottom. After the water tank 2 is installed on the tea and coffee machine 1, the water outlet pipe at the bottom of the water tank 2 is connected to the water inlet pipe 53. At the same time, the bottom of the water tank 2 contacts the pressure member 52. The weight of the water tank 2 and the liquid inside the water tank 2 causes the pressure member 52 to move downward. As the pressure member 52 descends, the first elastic member 55 is compressed. The pressure block 521 on the pressure member 52 moves down and contacts the first control switch 54, thus connecting the control circuit 8 on the base 5. Before the liquid in the water tank 2 is used up, the weight of the water tank 2 gradually decreases. The first elastic member 55 resets and causes the pressure member 52 to move upward, thereby separating the pressure block 521 from the first control switch 54. This disconnects the control circuit 8, causing the water pump 11 to stop working and reducing the direct friction of the internal metal parts of the water pump 11.

[0025] During normal pumping, the liquid forms a "liquid film" between the impeller and the pump casing, reducing direct friction between metal parts. When pumping dry, the liquid film disappears, and the impeller (high-speed rotating part) will experience hard friction with the inner wall of the pump casing and the mechanical seal, resulting in scratches and deformation on the impeller surface, and even metal fragments. In severe cases, the impeller will break directly.

[0026] The pressure member 52 has grooves 522 on both sides, and the inner wall of the positioning frame 51 has a first top block 512 corresponding to the groove 522 on both sides. The first top block 512 slides elastically on the positioning frame 51. The inner wall of the positioning frame 51 has mounting holes 511 on both sides. The first top block 512 is spherical. The inner diameter of the mounting hole 511 is smaller than the diameter of the first top block 512, which limits the position of the first top block 512. A positioning block 514 is installed at the outer end of the mounting hole 511. A second elastic element 513 is provided between the positioning block 514 and the first top block 512. The second elastic element 513 is a spring. The circumferential of the positioning block 514 is threaded to the mounting hole 511 to facilitate the installation of the first top block 512.

[0027] In the above scheme, after the water tank 2 is installed, the pressure member 52 descends into the positioning frame 51 under the weight of the water tank 2. The first top block 512 is squeezed and contracted into the mounting hole 511 by the pressure member 52. At the same time, the first elastic member 55 is compressed. When the first top block 512 corresponds to the groove 522, the first top block 512 enters into the groove 522 through the second elastic member 513, thus completing the constraint of the pressure member 52. When the liquid in the water tank 2 is gradually reduced, the overall weight of the water tank 2 is insufficient to suppress the first elastic member 55. The first elastic member 55 slowly resets and drives the water tank 2 to move upward through the pressure member 52. At the same time, the pressure member 52 overcomes the pressure of the second elastic member 513 on the first top block 512, causing the pressure block 521 on the pressure member 52 to move upward quickly and separate from the first control switch 54, thereby disconnecting the control circuit 8 and stopping the water pump 11. This prevents the pressure block 521 and the first control switch 54 from separating prematurely when there is a certain amount of liquid in the water tank 2.

[0028] A pressure unit is installed on the liquid outlet pipe 6. The weight control unit and the pressure unit are connected in series on the control circuit 8. The pressure unit includes a control housing 7. A first push rod 71 is connected to the end of the control housing 7 facing the placement platform 4. A first top plate 72 corresponding to the placement platform 4 is fixedly connected to the front end of the first push rod 71. The first top plate 72 can increase the contact area between the first push rod 71 and the placement platform 4. A through hole 731 is opened at one end of the slider 73 in the vertical direction. The through hole 731 corresponds to the inner diameter of the liquid outlet pipe 6. The inside of the control housing 7 is slidably connected. There is a slider 73, and sealing rings are provided between the upper and lower ends of the slider 73 and the control housing 7. The sealing rings are located at the through hole 731 to prevent liquid leakage between the slider 73 and the control housing 7. The rear end of the first push rod 71 passes through the control housing 7 and is fixedly connected to the slider 73. A third elastic element 75 is connected between the slider 73 and the inner wall of the control housing 7. A second push switch 74 for controlling the on and off of the control circuit 8 is fixedly connected to the inner wall of the rear end of the control housing 7. A second push block 732 corresponding to the second push switch 74 is fixedly connected to the rear end of the slider 73.

[0029] In the above scheme, during the process of inserting the placement platform 4 into the tea and coffee machine 1, the rear side of the placement platform 4 contacts the first top plate 72. The placement platform 4 drives the slider 73 to slide within the control housing 7 through the first top plate 72 and the first top rod 71. When the placement platform 4 is inserted into place, the tea and coffee machine 1 restricts the placement platform 4. At this time, the through hole 731 corresponds to the liquid outlet pipe 6, and the second top block 732 on the slider 73 contacts the second press switch 74, so that the control circuit 8 on the control housing 7 is in a connected state, preventing the liquid outlet pipe 6 from draining into the tea and coffee machine 1 due to the placement platform 4 not being installed in place.

[0030] The working principle of the control switch described above is as follows: when not pressed, there is a gap between the moving contact and the normally open terminal (such as NO), and the circuit is in an open state. When pressure is applied to the button cap, the moving contact contacts the normally open terminal, and the circuit is connected. The control switch is a common and mature existing technology, and will not be described in detail here.

[0031] Working principle: Before using the tea and coffee machine 1, first install the water tank 2 and the placement platform 4 on the tea and coffee machine 1, so that the water tank 2 and the placement platform 4 are installed in place; After the water tank 2 is installed in place, the weight of the water tank 2 causes the pressure component 52 to drop, thereby causing the pressure block 521 on the pressure component 52 to contact the first control switch 54 on the base 5, so that the control line 8 on the base 5 is in a connected state. After the placement platform 4 is installed in place, the placement platform 4 pushes the slider 73 to move through the first top rod 71 and the first top plate 72, so that the through hole 731 on the slider 73 is connected to the liquid outlet pipe 6. At this time, the second top block 732 on the slider 73 contacts the second push switch 74, so that the control circuit 8 on the control housing 7 is in a connected state, thereby enabling the tea and coffee machine 1 to operate normally. As the liquid in the water tank 2 gradually decreases, the overall weight of the water tank 2 becomes insufficient to suppress the first elastic element 55. The first elastic element 55 resets and drives the water tank 2 to move upward through the pressure element 52. At the same time, the pressure element 52 overcomes the pressure of the second elastic element 513 on the first top block 512, causing the pressure block 521 on the pressure element 52 to move upward quickly and separate from the first control switch 54, thereby disconnecting the control circuit 8 and stopping the water pump 11 from working, reducing the direct friction of the internal metal parts of the water pump 11.

[0032] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tea and coffee machine with a mechanical safety interlock device, comprising a tea and coffee machine (1), wherein a water tank (2) is provided on the rear side of the tea and coffee machine (1), a pressing unit (3) is provided on the upper front side of the interior of the tea and coffee machine (1), a placement platform (4) corresponding to the pressing unit (3) is inserted into the front end of the tea and coffee machine (1), and a base (5) is connected to the lower end of the tea and coffee machine (1), characterized in that, The base (5) is provided with an inlet pipe (53) and a weight control unit at the rear end. The inlet pipe (53) is connected to the water pump (11). The water tank (2) is provided with an outlet pipe corresponding to the inlet pipe (53) at the lower end. After installation, the water tank (2) is in contact with the weight control unit, so that the control line (8) is connected through the weight control unit. The pressure unit (3) is provided with a liquid outlet pipe (6), and a pressure unit for controlling the on / off state of the control circuit (8) is installed on the liquid outlet pipe (6). The weight control unit and the pressure unit are connected in series on the control circuit (8).

2. A tea and coffee machine with a mechanical safety interlock device according to claim 1, characterized in that: The weight control unit includes a positioning frame (51) fixed on the base (5). A pressure member (52) is slidably installed inside the positioning frame (51). A first elastic member (55) is provided between the pressure member (52) and the positioning frame (51). The control line (8) is electrically connected to the water pump (11). A first control switch (54) for controlling the on and off of the control line (8) is provided on the base (5). The pressure member (52) has a one-way open cavity below it. A pressure block (521) corresponding to the first control switch (54) is provided in the cavity.

3. A tea and coffee machine with a mechanical safety interlock device according to claim 2, characterized in that: The pressure member (52) has grooves (522) on both sides, and the inner wall of the positioning frame (51) has a first top block (512) corresponding to the groove (522) on both sides. The first top block (512) slides elastically on the positioning frame (51).

4. A tea and coffee machine with a mechanical safety interlock device according to claim 3, characterized in that: The positioning frame (51) has mounting holes (511) on both sides of its inner wall. A positioning block (514) is installed at the outer end of the mounting hole (511). A second elastic element (513) is provided between the positioning block (514) and the first top block (512). The positioning block (514) is threadedly connected to the mounting hole (511) in the circumferential direction.

5. A tea and coffee machine with a mechanical safety interlock device according to claim 4, characterized in that: The first top block (512) is spherical, and the inner diameter of the mounting hole (511) is smaller than the diameter of the first top block (512).

6. A tea and coffee machine with a mechanical safety interlock device according to claim 3, characterized in that: The upper end of the liquid outlet pipe (6) is sealed, and a circular groove (631) is formed between the upper end of the liquid outlet pipe (6) and the spike (63). The diameter of the circular groove (631) is equal to the diameter of the top cover (72).

7. A tea and coffee machine with a mechanical safety interlock device according to claim 1, characterized in that: The top-pressing unit includes a control housing (7), one end of which facing the placement platform (4) is connected to a first top rod (71). A slider (73) is slidably connected inside the control housing (7). One end of the slider (73) has a through hole (731) arranged in the vertical direction. The rear end of the first top rod (71) passes through the control housing (7) and is fixedly connected to the slider (73). A third elastic element (75) is connected between the slider (73) and the inner wall of the control housing (7).

8. A tea and coffee machine with a mechanical safety interlock device according to claim 7, characterized in that: The control housing (7) has a second push switch (74) fixedly connected to the inner wall of the rear end to control the on / off state of the control circuit (8), and the slider (73) has a second top block (732) fixedly connected to the rear end of the slider (73) corresponding to the second push switch (74).

9. A tea and coffee machine with a mechanical safety interlock device according to claim 1, characterized in that: The tea and coffee machine (1) is equipped with a water pump (11), an instant heating element (12), an instant cooling element (13), and a room temperature heating element (14). The water inlet of the water pump (11) is connected to the water tank (2) through a pipe. The water outlet of the water pump (11) is connected to the instant heating element (12), the instant cooling element (13), and the room temperature heating element (14) respectively. The outlets of the instant heating element (12), the instant cooling element (13), and the room temperature heating element (14) are connected to the liquid outlet pipe (6) of the tea and coffee machine (1) through pipes respectively.

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