Steaming and baking equipment and control method thereof

Abstract

The present invention discloses a steaming and baking device and a control method thereof, wherein the steaming and baking device comprises an inner pot, an exhaust hood and a fan, wherein the exhaust hood and the fan are arranged on the inner pot, an exhaust channel is formed in the exhaust hood, an air outlet of the fan is connected with an air inlet of the exhaust channel, a first air outlet and a second air outlet are arranged on the inner pot, a partition is arranged in the exhaust hood to separate the exhaust channel into a first channel and a second channel, the first air outlet is connected to the first channel, the second air outlet is connected to the second channel, a first temperature and humidity sensor is arranged in the second channel, the structure is simple and the cost is low, and the service life of the temperature and humidity sensor can be extended to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking kitchen appliances, and in particular to a steaming and baking device and a control method thereof. Background Art

[0002] At present, the humidity detection function is rarely used in household steaming and baking appliances. This is mainly because the temperature and humidity sensors exposed to the inner tank of the steaming and baking equipment are in a high temperature and high humidity environment for a long time, resulting in a short service life. Multiple temperature and humidity sensors need to be replaced within a year, thereby increasing the use cost of the steaming and baking equipment.

[0003] In addition, since condensed water often condenses on the surface of the temperature and humidity sensor, the humidity measured by the temperature and humidity sensor is inaccurate, which will affect the normal operation of the steaming and baking equipment, and then affect the taste of the cooking and reduce the user experience.

[0004] To solve the above problems, some household steaming and baking equipment use more advanced temperature and humidity sensors, which are resistant to high temperature and high humidity environments, but are expensive and difficult to popularize. Summary of the invention

[0005] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention aims to provide a steaming and baking device with a simple structure and low cost, which can extend the service life of the temperature and humidity sensor to a certain extent.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A steaming and baking device comprises an inner pot, an exhaust hood and a fan, wherein the exhaust hood and the fan are arranged on the inner pot, an exhaust channel is formed in the exhaust hood, the air outlet of the fan is connected to the air inlet of the exhaust channel, a first air outlet and a second air outlet are arranged on the inner pot, a partition is arranged in the exhaust hood to separate the exhaust channel into a first channel and a second channel, the first air outlet is connected to the first channel, the second air outlet is connected to the second channel, and a first temperature and humidity sensor is arranged in the second channel.

[0008] In some embodiments, an area of ​​the first air outlet is greater than an area of ​​the second air outlet.

[0009] In some embodiments, the exhaust area of ​​the first channel is greater than the exhaust area of ​​the second channel.

[0010] In some embodiments, a cross section of the second channel is trumpet-shaped.

[0011] In some embodiments, the lower end of the first temperature and humidity sensor is a pointed end.

[0012] In some embodiments, the second air outlet is disposed close to the partition, and the first temperature and humidity sensor is disposed on a side of the partition and close to the second air outlet.

[0013] In some embodiments, a first flow sensor is provided in the second air outlet for measuring the steam flow Q1 at the second air outlet, a second temperature and humidity sensor is provided near the fan for measuring the ambient temperature and humidity and obtaining the ambient absolute humidity P2, and a second flow sensor is provided at a position close to the first temperature and humidity sensor in the second channel for measuring the exhaust port steam flow Q3 of the exhaust hood, and the first temperature and humidity sensor is used to measure the temperature and humidity of the second air outlet and obtain the second air outlet absolute humidity P3.

[0014] In some embodiments, the absolute humidity p1 of the inner tank is obtained by the following formula:

[0015]

[0016] Another object of the present invention is to provide a control method for steaming and baking equipment, which is simple, low-cost, and can extend the service life of the temperature and humidity sensor to a certain extent.

[0017] The above purpose is achieved through the following technical solutions:

[0018] A control method for a steaming and baking device is applied to the steaming and baking device as described above, and the control method comprises the following steps:

[0019] Start the steaming and baking equipment;

[0020] Determine whether the steaming and baking equipment is in the preheating stage;

[0021] If the steaming and baking device is in the preheating stage, the first temperature and humidity sensor is controlled to stop working; if the steaming and baking device is not in the preheating stage, it is determined whether the evaporator and / or the electric heating tube are working;

[0022] Whether to start the first temperature and humidity sensor is determined according to the judgment result.

[0023] In some implementations, the step of determining whether to start the first temperature and humidity sensor according to the judgment result is specifically:

[0024] If at least one of the evaporator and the electric heating tube is in working state, controlling the first temperature and humidity sensor to measure the temperature and humidity of the second air outlet;

[0025] If the evaporator and the electric heating tube are not in working state, the first temperature and humidity sensor stops working.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] 1. The steaming and baking device of the present invention measures the cooking humidity of the steaming and baking device by cooling and diluting the high-temperature and high-humidity steam, and reduces the condensed water on the surface of the temperature and humidity sensor to improve the detection accuracy of the temperature and humidity sensor. In addition, the structure is simple, stable and reliable, and the service life of the temperature and humidity sensor can be extended to a certain extent.

[0028] 2. The control method of the steaming and baking equipment of the present invention is simple, low-cost, and can extend the service life of the temperature and humidity sensor to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of a steaming and baking device in an embodiment of the present invention;

[0030] Figure 2 is an exploded schematic diagram of a steaming and baking device according to an embodiment of the present invention;

[0031] Figure 3 It is a flow chart of the control method in the embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0033] Embodiment 1: Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a steaming and baking device, including an inner pot 1, an exhaust hood 2 and a fan 3, wherein the exhaust hood 2 and the fan 3 are arranged on the inner pot 1, an exhaust channel is formed in the exhaust hood 2, the air outlet of the fan 3 is connected to the air inlet of the exhaust channel, a first air outlet 101 and a second air outlet 102 are arranged on the inner pot 1, a partition 4 is arranged in the exhaust hood 2 to separate the exhaust channel into a first channel 201 and a second channel 202, the first air outlet 101 is connected to the first channel 201, the second air outlet 102 is connected to the second channel 202, and a first temperature and humidity sensor 5 is arranged in the second channel 202.

[0034] The steaming and baking device of this embodiment measures the cooking humidity of the steaming and baking device by cooling and diluting the high-temperature and high-humidity steam, and reduces the condensation water on the surface of the temperature and humidity sensor to improve the detection accuracy of the temperature and humidity sensor. The structure is simple, stable and reliable, and the service life of the temperature and humidity sensor can be extended to a certain extent.

[0035] Specifically, the exhaust hood 2 is fan-shaped and flat, and the first air outlet 101 and the second air outlet 102 provided on the inner tank 1 are respectively connected to the first channel 201 and the second channel 202 formed in the exhaust hood 2. Since the first channel 201 and the second channel 202 are separated and independent of each other by the partition 4, the steam discharged from the first air outlet 101 and the second air outlet 102 will not interfere with each other. Among them, the steam discharged from the second air outlet 102 to the second channel 202 is greatly cooled and diluted due to the large gradient of the exhaust hood 2, and the steam flow rate is reduced. The fan 3 blows in the relatively cold air from the environment and mixes with the steam, which is blown out of the exhaust port of the exhaust hood 2, and the temperature will be greatly reduced, thereby improving the detection accuracy of the first temperature and humidity sensor 5.

[0036] In this embodiment, the area of ​​the first air outlet 101 is greater than the area of ​​the second air outlet 102. Specifically, the first air outlet 101 is formed directly above the inner pot 1 and is in a long strip shape, and its area is relatively large, and more steam is discharged, which belongs to a normal cooling steam outlet. The second air outlet 102 is also formed directly above the inner pot 1 and is circular, and its area is relatively small, and the steam discharged is small, which is used to cool and dilute the discharged steam to improve the detection accuracy of the first temperature and humidity sensor 5, and at the same time, it can avoid the first temperature and humidity sensor 5 from working under high temperature and high pressure, thereby helping to extend the service life of the first temperature and humidity sensor 5.

[0037] Preferably, the exhaust area of ​​the first channel 201 is larger than the exhaust area of ​​the second channel 202 , thereby facilitating the discharge of most of the steam through the first channel 201 to normally cool the inner tank 1 .

[0038] In this embodiment, the cross section of the second channel 202 is trumpet-shaped. The steam discharged from the second air outlet 102 into the second channel 202 is greatly cooled and diluted due to the large gradient of the second channel 202, and the steam flow rate is reduced. The fan 3 blows in the relatively cold ambient air and mixes with the steam, which is then blown out of the exhaust port of the exhaust hood 2. The temperature will be greatly reduced, thereby improving the detection accuracy of the first temperature and humidity sensor 5, and at the same time, avoiding the first temperature and humidity sensor 5 from working under high temperature and high pressure, thereby helping to extend the service life of the first temperature and humidity sensor 5.

[0039] Furthermore, the lower end of the first temperature and humidity sensor 5 is pointed. The steaming and baking device of this embodiment places the first temperature and humidity sensor 5 on its side, and the lower end of the first temperature and humidity sensor 5 is pointed, so that the condensed water condensed on the surface of the first temperature and humidity sensor 5 can flow down smoothly, reducing the condensed water on the surface of the first temperature and humidity sensor 5, thereby achieving the purpose of improving the measurement accuracy.

[0040] Furthermore, the second air outlet 102 is arranged close to the partition 4, and the first temperature and humidity sensor 5 is arranged on the side of the partition 4 and close to the second air outlet 102. In the steaming and baking device of this embodiment, the first temperature and humidity sensor 5 is arranged in the second channel 202 and is placed laterally and close to the second air outlet 102. Since the steam is greatly cooled and decelerated, the harshness of the working environment of the first temperature and humidity sensor 5 is reduced, and the amount of condensed water on the surface of the first temperature and humidity sensor 5 is greatly reduced; and the lower end of the first temperature and humidity sensor 5 is relatively pointed, so that the condensed water condensed on the surface of the first temperature and humidity sensor 5 can flow down smoothly, reducing the condensed water on the surface of the first temperature and humidity sensor 5, and the two together improve the life and measurement accuracy of the first temperature and humidity sensor 5.

[0041] Preferably, a first flow sensor 6 is provided in the second air outlet 102 for measuring the steam flow Q1 of the second air outlet 102, a second temperature and humidity sensor 7 is provided near the fan 3 for measuring the ambient temperature and humidity and obtaining the ambient absolute humidity P2, and a second flow sensor 8 is provided at a position close to the first temperature and humidity sensor 5 in the second channel 202 for measuring the exhaust port steam flow Q3 of the exhaust hood 2, and the first temperature and humidity sensor 5 is used to measure the temperature and humidity of the second air outlet 102 and obtain the second air outlet absolute humidity P3.

[0042] Furthermore, the absolute humidity P1 of the inner tank is obtained by the following formula:

[0043] By the formula: It is deduced that:

[0044] After obtaining the absolute humidity P1 of the inner tank, according to the relationship between the inner tank temperature, absolute humidity and relative humidity, and on the premise that the inner tank temperature and the absolute humidity P1 of the inner tank are known, the relative humidity ψ of the inner tank can be obtained by looking up the table.

[0045] In summary, the steaming and baking device of this embodiment can calculate the absolute humidity P1 of the inner pot by obtaining the absolute humidity P2 of the environment, the absolute humidity P3 of the second air outlet, the steam flow rate Q1 of the second air outlet 102, and the steam flow rate Q3 of the exhaust port, thereby indirectly detecting the cooking humidity of the inner pot. This can avoid the temperature and humidity sensor being exposed to the inner pot of the steaming and baking device in a high temperature and high humidity environment for a long time, resulting in a shorter service life.

[0046] Embodiment 2: Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a control method for a steaming and baking device, which is applied to the steaming and baking device as described in the first embodiment. The control method includes the following steps:

[0047] S101, start the steaming and baking equipment;

[0048] S102, determining whether the steaming and baking device is in the preheating stage, if the steaming and baking device is in the preheating stage, proceeding to step S103, if the steaming and baking device is not in the preheating stage, proceeding to step S104;

[0049] S103, controlling the first temperature and humidity sensor 5 to stop working;

[0050] S104, judging whether the evaporator and / or the electric heating tube are working, that is, judging whether one or more of them are working. If at least one of the evaporator and the electric heating tube is in working state, the process proceeds to step S105. If neither the evaporator nor the electric heating tube is in working state, the process proceeds to step S103.

[0051] S105, controlling the first temperature and humidity sensor 5 to measure the temperature and humidity of the second air outlet 102;

[0052] S106, transmitting the measured absolute humidity P3 of the second air outlet to the control system, and proceeding to step S102.

[0053] The control method of the steaming and baking device of this embodiment is simple and low in cost, and can extend the service life of the temperature and humidity sensor to a certain extent.

[0054] Specifically, when the inner tank 1 is in the preheating stage, the first temperature and humidity sensor 5 does not work; when the temperature of the inner tank reaches the set temperature, since the evaporator in the steaming mode and the electric heating tube in the leaning mode work intermittently, when the evaporator and the electric heating tube are not working, the discharged steam is less, and the measurement at this time will reduce the measurement accuracy. Therefore, the first temperature and humidity sensor 5 performs temperature and humidity measurement when one or more of the evaporator and the electric heating tube are working, so as to improve the measurement accuracy and increase the life of the temperature and humidity sensor.

[0055] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A steaming and baking device, comprising an inner pot (1), an exhaust hood (2) and a fan (3), wherein the exhaust hood (2) and the fan (3) are arranged on the inner pot (1), an exhaust passage is formed in the exhaust hood (2), an air outlet of the fan (3) is connected to an air inlet of the exhaust passage, and the device is characterized in that: The inner container (1) is provided with a first air outlet (101) in the form of an elongated strip and a second air outlet (102) in the form of a circular strip, wherein the area of ​​the first air outlet (101) is larger than the area of ​​the second air outlet (102); A partition (4) is provided in the exhaust hood (2) to separate the exhaust channel into a first channel (201) and a second channel (202); the first air outlet (101) is connected to the first channel (201); the second air outlet (102) is connected to the second channel (202); and a first temperature and humidity sensor (5) is provided in the second channel (202).

2. The steaming and baking device according to claim 1, characterized in that: An exhaust area of ​​the first channel (201) is greater than an exhaust area of ​​the second channel (202).

3. The steaming and baking device according to claim 2, characterized in that: The cross section of the second channel (202) is trumpet-shaped.

4. A steaming and baking device according to any one of claims 1 to 3, characterized in that: The lower end of the first temperature and humidity sensor (5) is a pointed end.

5. The steaming and baking device according to any one of claims 1 to 3, characterized in that: The second air outlet (102) is arranged close to the partition (4), and the first temperature and humidity sensor (5) is arranged on a side surface of the partition (4) and close to the second air outlet (102).

6. The steaming and baking device according to any one of claims 1 to 3, characterized in that: A first flow sensor (6) is arranged in the second air outlet (102) for measuring the steam flow Q1 of the second air outlet (102); a second temperature and humidity sensor (7) is arranged near the fan (3) for measuring the ambient temperature and humidity and obtaining the ambient absolute humidity P2; a second flow sensor (8) is arranged in the second channel (202) at a position close to the first temperature and humidity sensor (5) for measuring the steam flow Q3 of the exhaust port of the exhaust hood (2); and the first temperature and humidity sensor (5) is used to measure the temperature and humidity of the second air outlet (102) and obtain the second air outlet absolute humidity P3.

7. The steaming and baking device according to claim 6, characterized in that: The absolute humidity p1 of the inner tank is obtained by the following formula:

8. A control method for steaming and baking equipment, characterized in that: Applied to the steaming and baking device according to any one of claims 1 to 7, the control method comprises the following steps: Start the steaming and baking equipment; Determine whether the steaming and baking equipment is in the preheating stage; If the steaming and baking device is in the preheating stage, the first temperature and humidity sensor (5) is controlled to stop working; if the steaming and baking device is not in the preheating stage, it is determined whether the evaporator and / or the electric heating tube are working; If at least one of the evaporator and the electric heating tube is in a working state, controlling the first temperature and humidity sensor (5) to measure the temperature and humidity of the second air outlet (102); If the evaporator and the electric heating tube are not in working state, the first temperature and humidity sensor (5) stops working.

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