A multi-functional steam cooker without water level sensor

Abstract

The utility model relates to air fryer technical field, especially point to a kind of multifunctional steam fryer of no water level sensor;Including host computer, the water tank, water pump and heating pot connected by pipeline in proper order are equipped on the host computer, the host computer has cooking cavity and control circuit board, and heating pot is communicated cooking cavity by switching pipeline;The heating pot is equipped with temperature control element, and heating pot, water pump and temperature control element are connected control circuit board by line respectively;A kind of multifunctional steam fryer of no water level sensor of the utility model, temperature control element real-time monitoring the working temperature of heating pot, control circuit board starts water pump and pumps water to heating pot cooling, whether there is water in water tank by the parameter logic of temperature control element, save a water level sensor, avoid the failure risk caused by water level sensor failure or misjudgment.

Description

Technical Field

[0001] This utility model relates to the field of air fryer technology, and in particular to a multifunctional steam fryer without a water level sensor. Background Technology

[0002] Currently, some air fryers on the market have steaming and cooking functions, which can achieve air baking and steam cooking. To prevent malfunctions caused by prolonged dry burning of the heating element, a sensor is usually installed in the water tank to monitor the water level.

[0003] For example, Chinese patent CN202010219205 discloses a control method for an air fryer with steaming and cooking functions. The air fryer includes a cooking chamber set inside the shell, a control unit set inside the air fryer, and a water tank set inside the air fryer. The water tank is connected to a steam generator through a water pump. The steam generator generates steam and introduces it into the cooking chamber. A liquid level sensor is installed at the bottom of the water tank to send a signal that the water has been pumped out.

[0004] Current technologies typically use reed switches and other components as liquid level sensors, which are prone to malfunction due to abnormal temperatures. Furthermore, various sensors require wiring to connect to a controller, resulting in a relatively complex overall structure. Therefore, existing technologies require further improvement and development. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a multi-functional steam fryer with a reasonable structure, which eliminates the need for an electronic component and avoids misjudgment of water level.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The present invention discloses a multi-functional steam fryer without a water level sensor, comprising a main unit, wherein a water tank, a water pump and a heating element are connected in sequence by pipes on the main unit, the main unit has a cooking cavity and a control circuit board, and the heating element is connected to the cooking cavity by switching pipes; the heating element is provided with a temperature control element, and the heating element, the water pump and the temperature control element are respectively connected to the control circuit board by circuits.

[0007] The multi-functional steam fryer's water tank, water pump, and heating element are connected sequentially via pipes. The water pump draws water from the tank to generate high-temperature steam in the heating element, which is then supplied to the cooking cavity via a switching pipe to heat the food. Preferably, this invention eliminates the need for a water level sensor in the water tank, saving an electronic component and avoiding safety risks caused by misjudgments of the water level.

[0008] The heating element is equipped with a temperature control component, and the control circuit board can execute corresponding operations based on the information from the temperature control component and a preset program. Specifically, when the multi-functional steam fryer starts working, the heating element starts first. When the temperature control component detects that the heating element has reached the set temperature, the water pump starts to deliver water from the water tank to the heating element. The water vaporizes inside the heating element to generate high-temperature steam, and the temperature of the heating element drops rapidly. The high-temperature steam then enters the cooking cavity through a switching pipe to heat the food. Of course, the heating element continues to work, and the control circuit board, based on the information from the temperature control component, controls the water pump to intermittently pump water to continuously generate high-temperature steam until the preset program ends.

[0009] It is understood that the temperature control element has a critical temperature setting. When the temperature of the heating pot reaches the highest set value, the control circuit board turns off the heating pot, but the temperature of the heating pot is still maintained at the highest set value. At the same time, the water pump is in the start state. If there is no water in the water tank, the temperature of the heating pot cannot drop in a short time. Then the control circuit board displays that there is no water and stops the heating pot, water pump and main unit from working, and prompts the user to add water.

[0010] This invention is based on the logic judgment of the control circuit board, eliminating the need to install a water level sensor in the water tank, reducing the number of electronic components, avoiding safety risks caused by water level sensor failure or misjudgment, simplifying the layout of the whole machine, and reducing manufacturing costs.

[0011] According to the above scheme, the temperature control element includes a temperature sensor and a jump sensor, which are respectively encapsulated on the heating pot and connected to the control circuit board. It is understood that the temperature sensor, directly encapsulated on the heating pot, can detect the temperature status of the heating pot in real time and send the data to the control circuit board. Of course, the temperature sensor can be any existing type of sensor; preferably, an NTC temperature controller is used.

[0012] Furthermore, to avoid the risk of circuit failure caused by dry burning, the heating pot is also equipped with a snap-start sensor. As a secondary safety protection mechanism, the snap-start sensor avoids the safety risks caused by overheating of the heating pot in the event of a fault. The snap-start sensor is encapsulated on the heating pot and connected to the main circuit of the heating pot and the control circuit board. When the heating pot exceeds the critical temperature for dry burning, it can cut off the working circuit of the whole machine.

[0013] According to the above scheme, the preset lower limit of the temperature sensor is 120℃, and the preset upper limit of the temperature sensor is 180℃. Specifically, when the multi-functional steam fryer starts running, the heating pot first heats up to 120℃, and then the water pump intermittently pumps water from the water tank to the heating pot to generate high-temperature steam. When the temperature of the heating pot exceeds 180℃, heating stops, but the continuous water supply from the water pump will cause the temperature of the heating pot to gradually decrease until the temperature of the heating pot drops below 180℃, at which point the heating pot will restart. The control circuit board can control the heating pot and water pump to perform the above process based on the information provided by the temperature sensor until the set cooking time is over.

[0014] Furthermore, when the water tank is low on water, the temperature of the heating pot will exceed 180°C. At this time, the temperature of the heating pot will rise slightly and remain above the preset upper limit of temperature within a unit of time. At this time, the control circuit board will obtain the logical judgment result according to the program settings, shut down the whole machine and send a prompt signal to the user.

[0015] According to the above scheme, the control circuit board is equipped with a delay circuit, and the delay circuit is set to 30 seconds. When the water tank is short of water, the temperature of the heating pot will exceed 180°C. If the temperature of the heating pot does not drop below the preset upper temperature limit within 30 seconds, it indicates that the water pump cannot draw water from the water tank, and the water tank will be short of water according to the logic.

[0016] According to the above solution, the control circuit board is equipped with an alarm module and a reset module. When the water tank is low on water, the control circuit board sends an audible and visual alert through the alarm module to remind the user that the water tank is low. After the user adds water to the tank, the reset module allows the steam fryer to continue its cooking program.

[0017] According to the above scheme, the main unit also includes a partition that can be inserted into the cooking cavity to divide it into a first zone and a second zone. The heating pot is connected to the first zone and the second zone respectively through switching pipes. Preferably, the partition is a detachable design that can be inserted into the cooking cavity to divide it into a first zone and a second zone, so as to independently perform steaming, baking and air frying cooking. Correspondingly, the heating pot can provide high-temperature steam to the first zone and the second zone respectively, or output high-temperature steam to the first zone and the second zone simultaneously, by switching pipes.

[0018] Furthermore, after the partition is removed, the cooking cavity can be used as an independent space.

[0019] Furthermore, the first and second zones are each equipped with a circulating air duct, and a heating element is installed inside the circulating air duct to achieve air frying cooking.

[0020] According to the above scheme, the switching pipeline includes a steam outlet pipe, a three-way adapter, a first exhaust pipe, and a second exhaust pipe. The steam outlet pipe is connected to the heating pot and the first port of the three-way adapter, respectively. The first exhaust pipe is connected to the second port of the three-way adapter and the first zone of the cooking cavity, respectively. The second exhaust pipe is connected to the third port of the three-way adapter and the second zone of the cooking cavity, respectively. The high-temperature steam generated by the heating pot is input into the first and / or second zones of the cooking cavity through the steam outlet pipe, the three-way adapter, and the first and / or second exhaust pipes.

[0021] According to the above scheme, the switching pipeline further includes a first solenoid valve and a second solenoid valve. The first solenoid valve is connected to the second port of a three-way adapter via a connecting pipe, and the first exhaust pipe is connected to the first solenoid valve. The second solenoid valve is connected to the third port of a three-way adapter via a connecting pipe, and the second exhaust pipe is connected to the second solenoid valve. The first and second solenoid valves are respectively connected to a control circuit board via wiring. The first and second solenoid valves are normally closed. When the first and / or second zones of the cooking cavity are executing a cooking program, the corresponding first and second solenoid valves can be activated, allowing the high-temperature steam generated by the heating pot to enter the cooking cavity.

[0022] This invention relates to a multi-functional steam fryer without a water level sensor. The temperature control element monitors the working temperature of the heating pot in real time, and the control circuit board starts the water pump to draw water to cool the heating pot. The parameter logic of the temperature control element determines whether there is water in the water tank, eliminating the need for a water level sensor and avoiding the risk of failure caused by the malfunction or misjudgment of the water level sensor. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of the main unit of this utility model; Figure 3 This is a schematic diagram of the pipeline connection between the water tank and the cooking cavity of this utility model; Figure 4 This is a schematic diagram of the dual-cavity cooking chamber of this utility model; Figure 5 This is a schematic diagram of the single-cavity cooking chamber structure of this utility model; In the picture: 1. Main unit; 2. Heating pot; 3. Steam outlet pipe; 11. Water tank; 12. Water pump; 13. Cooking cavity; 14. Partition; 131. First zone; 132. Second zone; 21. Temperature sensor; 22. Sudden release sensor; 31. T-connector; 32. First exhaust pipe; 33. Second exhaust pipe; 34. First solenoid valve; 35. Second solenoid valve; 36. Adapter pipe. Detailed Implementation

[0024] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1-5 As shown, the present invention discloses a multi-functional steam fryer without a water level sensor, comprising a main unit 1. The main unit 1 is provided with a water tank 11, a water pump 12 and a heating pot 2 connected in sequence by pipes. The main unit 1 has a cooking cavity 13 and a control circuit board. The heating pot 2 is connected to the cooking cavity 13 by switching pipes. The heating pot 2 is provided with a temperature control element. The heating pot 2, the water pump 12 and the temperature control element are respectively connected to the control circuit board by circuits.

[0026] The water tank 11, water pump 12, and heating element 2 of the multi-functional steam fryer are connected sequentially via pipelines. The water pump 12 draws water from the water tank 11 to generate high-temperature steam in the heating element 2, which is then fed into the cooking cavity 13 through a switching pipeline to heat the food. Preferably, this invention eliminates the need for a water level sensor in the water tank 11, thus saving an electronic component and avoiding safety risks caused by misjudgments of the water level in the tank 11.

[0027] The heating pot 2 is equipped with a temperature control element. The control circuit board can execute corresponding operations based on the information from the temperature control element and a preset program. Specifically, when the multi-functional steam fryer starts working, the heating pot 2 starts first. When the temperature control element detects that the heating pot 2 has reached the set temperature, the water pump 12 starts to deliver water from the water tank 11 to the heating pot 2. The water vaporizes in the heating pot 2 to generate high-temperature steam, and the temperature of the heating pot 2 drops rapidly. The high-temperature steam then enters the cooking chamber 13 through a switching pipe to heat the food. Of course, the heating pot 2 continues to work, and the control circuit board, based on the information from the temperature control element, controls the water pump 12 to intermittently pump water to continuously generate high-temperature steam until the preset program ends.

[0028] It is understood that the temperature control element has a critical temperature setting. When the temperature of the heating pot 2 reaches the highest set value, the control circuit board turns off the heating pot 2, but the temperature of the heating pot 2 is still maintained at the highest set value. At the same time, the water pump 12 is in the start state. If there is no water in the water tank 11, the temperature of the heating pot 2 cannot drop in a short time. Then the control circuit board displays that there is no water and stops the operation of the heating pot 2, the water pump 12 and the main unit 1, and prompts the user to add water.

[0029] This invention is based on the logic judgment of the control circuit board, eliminating the need to install a water level sensor in the water tank 11. This reduces the number of electronic components, avoids safety risks caused by water level sensor failure or misjudgment, simplifies the overall layout of the machine, and reduces manufacturing costs.

[0030] The temperature control element includes a temperature sensor 21 and a jump sensor 22, which are respectively encapsulated on the heating pot 2 and connected to the control circuit board. It is understood that the temperature sensor 21, directly encapsulated on the heating pot 2, can detect the temperature status of the heating pot 2 in real time and send the data to the control circuit board. Of course, the temperature sensor 21 can be any existing type of sensor; preferably, an NTC temperature controller is used.

[0031] Furthermore, to avoid the risk of circuit failure caused by dry burning, the heating pot 2 is also equipped with a jump sensor 22. The jump sensor 22 serves as a secondary safety protection mechanism to prevent the safety risks caused by overheating of the heating pot 2 in the event of a fault. The jump sensor 22 is encapsulated on the heating pot 2 and connected to the main circuit of the heating pot 2 and the control circuit board. When the heating pot 2 exceeds the critical temperature for dry burning, it can cut off the working circuit of the whole machine.

[0032] The preset lower limit of the temperature sensor 21 is 120°C, and the preset upper limit of the temperature sensor 21 is 180°C. Specifically, when the multi-functional steam fryer starts running, the heating pot 2 first heats up to 120°C, and then the water pump 12 intermittently pumps water to deliver water from the water tank 11 to the heating pot 2 to generate high-temperature steam. When the temperature of the heating pot 2 exceeds 180°C, heating stops, but the continuous water supply from the water pump 12 will cause the temperature of the heating pot 2 to gradually decrease until the temperature of the heating pot 2 drops below 180°C, at which point the heating pot 2 will continue to start. The control circuit board can control the heating pot 2 and the water pump 12 to perform the above process based on the information provided by the temperature sensor 21 until the set cooking time ends.

[0033] Furthermore, when the water tank 11 is in a water shortage state, the temperature of the heating pot 2 will exceed 180°C. At this time, the temperature of the heating pot 2 will rise slightly and remain above the preset upper temperature limit within a unit of time. At this time, the control circuit board obtains the logical judgment result according to the program settings, shuts down the whole machine and sends a prompt signal to the user.

[0034] The control circuit board is equipped with a delay circuit, and the delay circuit is set to 30 seconds. When the water tank 11 is in a water shortage state, the temperature of the heating pot 2 will exceed 180°C. If the temperature of the heating pot 2 does not drop below the preset upper temperature limit within 30 seconds, it means that the water pump 12 cannot draw water from the water tank 11, and the water tank 11 is in a water shortage state according to the logic.

[0035] The control circuit board is equipped with an alarm module and a reset module. When the water tank 11 is low on water, the control circuit board sends an audible and visual alert through the alarm module to remind the user that the water tank 11 is low on water. After the user adds water to the water tank 11, the reset module can be used to allow the steam fryer to continue its cooking program.

[0036] like Figure 4-5 As shown, the main unit 1 also includes a partition 14, which can be inserted into the cooking cavity 13 to divide it into a first zone 131 and a second zone 132. The heating pot 2 is connected to the first zone 131 and the second zone 132 respectively through switching pipes. Preferably, the partition 14 is a detachable design, which can be inserted into the cooking cavity 13 to divide it into the first zone 131 and the second zone 132, so as to independently perform steaming and baking and air frying cooking. Correspondingly, the heating pot 2 can provide high-temperature steam to the first zone 131 and the second zone 132 respectively, or output high-temperature steam to the first zone 131 and the second zone 132 simultaneously, through switching pipes.

[0037] Furthermore, after removing the partition 14, the cooking cavity 13 can be used as an independent space.

[0038] Furthermore, the first zone 131 and the second zone 132 are respectively provided with circulating air channels, and heating elements are installed in the circulating air channels to achieve air frying cooking.

[0039] like Figure 3 As shown, the switching pipeline includes a steam outlet pipe 3, a three-way adapter 31, a first exhaust pipe 32, and a second exhaust pipe 33. The steam outlet pipe 3 is connected to the heating pot 2 and the first port of the three-way adapter 31, respectively. The first exhaust pipe 32 is connected to the second port of the three-way adapter 31 and the first zone 131 of the cooking cavity 13, respectively. The second exhaust pipe 33 is connected to the third port of the three-way adapter 31 and the second zone 132 of the cooking cavity 13, respectively. The high-temperature steam generated by the heating pot 2 is input into the first zone 131 and / or the second zone 132 of the cooking cavity 13 through the steam outlet pipe 3, the three-way adapter 31, and the first exhaust pipe 32 and / or the second exhaust pipe 33.

[0040] The switching pipeline also includes a first solenoid valve 34 and a second solenoid valve 35. The first solenoid valve 34 is connected to the second port of the three-way adapter 31 via an adapter pipe 36, and the first exhaust pipe 32 is connected to the first solenoid valve 34. The second solenoid valve 35 is connected to the third port of the three-way adapter 31 via an adapter pipe 36, and the second exhaust pipe 33 is connected to the second solenoid valve 35. The first solenoid valve 34 and the second solenoid valve 35 are respectively connected to the control circuit board via wiring. The first solenoid valve 34 and the second solenoid valve 35 are normally closed. When the first zone 131 and / or the second zone 132 of the cooking cavity 13 executes the cooking program, the corresponding first solenoid valve 34 and the second solenoid valve 35 can be activated, allowing the high-temperature steam generated by the heating pot 2 to enter the cooking cavity 13.

[0041] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A multi-functional steam fryer without a water level sensor, comprising a main unit (1), wherein the main unit (1) is provided with a water tank (11), a water pump (12), and a heating element (2) connected in sequence by pipelines, characterized in that, The main unit (1) has a cooking cavity (13) and a control circuit board, and the heating pot (2) is connected to the cooking cavity (13) through a switching pipe. The heating pot (2) is equipped with a temperature control element. The heating pot (2), water pump (12) and temperature control element are respectively connected to the control circuit board through circuits.

2. The multi-functional steam fryer without a water level sensor according to claim 1, characterized in that, The temperature control element includes a temperature sensor (21) and a jump sensor (22), which are respectively encapsulated on the heating pot (2) and connected to the control circuit board.

3. The multifunctional steam fryer without a water level sensor according to claim 2, characterized in that, The preset lower limit of the temperature sensor (21) is 120°C, and the preset upper limit of the temperature sensor (21) is 180°C.

4. The multi-functional steam fryer without a water level sensor according to claim 2, characterized in that, The control circuit board is equipped with a delay circuit, and the delay time is set to 30 seconds.

5. The multifunctional steam fryer without a water level sensor according to claim 2, characterized in that, The control circuit board is equipped with an alarm module and a reset module.

6. The multifunctional steam fryer without a water level sensor according to claim 1, characterized in that, The main unit (1) also includes a partition (14), which can be inserted into the cooking cavity (13) to divide it into a first zone (131) and a second zone (132). The heating pot (2) is connected to the first zone (131) and the second zone (132) respectively through a switching pipeline.

7. The multi-functional steam fryer without a water level sensor according to claim 6, characterized in that, The switching pipeline includes an exhaust pipe (3), a three-way adapter (31), a first exhaust pipe (32), and a second exhaust pipe (33). The exhaust pipe (3) is connected to the heating pot (2) and the first port of the three-way adapter (31), respectively. The first exhaust pipe (32) is connected to the second port of the three-way adapter (31) and the first zone (131) of the cooking cavity (13), respectively. The second exhaust pipe (33) is connected to the third port of the three-way adapter (31) and the second zone (132) of the cooking cavity (13), respectively.

8. The multi-functional steam fryer without a water level sensor according to claim 7, characterized in that, The switching pipeline also includes a first solenoid valve (34) and a second solenoid valve (35). The first solenoid valve (34) is connected to the second port of the three-way adapter (31) via a connector (36), and the first exhaust pipe (32) is connected to the first solenoid valve (34). The second solenoid valve (35) is connected to the third port of the three-way adapter (31) via a connector (36), and the second exhaust pipe (33) is connected to the second solenoid valve (35). The first solenoid valve (34) and the second solenoid valve (35) are respectively connected to the control circuit board via wiring.

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