A lid for a rice cooker

Abstract

This utility model relates to the field of household appliance technology, providing a lid for a rice cooker. The rice cooker includes a pot body with an inner pot space. The lid includes a top cover and an inner cover connected to the inside of the top cover. The top cover is hinged to the pot body. The inner cover has a vent that connects the inner pot space to the outside. A temperature detection device is installed inside the vent. Advantages: It reduces the number of openings in the inner cover, minimizing steam and moisture leakage, maintaining a normal pressure and humidity environment inside the pot, ensuring efficient cooking and good food taste. For the inner cover made of fragile materials, it prevents durability issues. For manufacturers, it reduces manufacturing complexity and improves production efficiency. For users, it reduces cleaning difficulty and optimizes the user experience. The temperature detection device, located inside the vent, can accurately detect the internal temperature, improving the accuracy of the detection results.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, and more specifically, to a lid for a rice cooker. Background Technology

[0002] An electric rice cooker is a modern cooking appliance capable of steaming, boiling, stewing, simmering, and braising. It not only cooks food but also keeps it warm. It is clean, hygienic, and pollution-free to use, saving time and effort. It is an indispensable tool for modern household chores. Its core components include an inner pot, a heating plate, and a temperature control system.

[0003] The rice cooker has a lid attached to the pot body. The vent on the lid allows steam to escape from the pot, releasing some pressure and ensuring cooking safety. It also effectively guides rising foam out of the lid, preventing overflow. The lid is usually also equipped with a temperature sensor, which monitors the temperature inside the pot in real time and transmits this information to the control system. This controls the rice cooker's operation, ensuring that food is cooked at the optimal temperature during boiling, simmering, or keep-warm stages. Additionally, it can trigger overheat protection if abnormally high temperatures are detected, preventing fire or damage to the appliance.

[0004] Current rice cooker lids typically have a vent and another opening in a separate location to provide a detection point for the temperature sensor. However, having multiple openings presents several drawbacks: First, it leads to excessive steam leakage, disrupting the micro-pressure environment inside the pot and making it difficult for the rice to gelatinize. Second, multiple openings cause excessive moisture loss, affecting the texture of the rice. Third, for some fragile inner lid materials, multiple openings can easily damage the inner lid. Fourth, the openings allow rice paste and porridge to accumulate, increasing the difficulty of cleaning. Furthermore, since steam flows out through the vent, placing the temperature sensor far from the vent also means the sensor is further from the steam concentration point, affecting the accuracy of temperature detection. Utility Model Content

[0005] The present invention aims to overcome at least one defect (deficiency) of the prior art and provide a lid for a rice cooker that reduces the number of openings in the inner lid to avoid excessive steam and moisture loss.

[0006] The technical solution adopted by this utility model is to provide a lid for an electric rice cooker. The electric rice cooker includes a pot body, and the pot body has an inner pot space. The lid includes a top cover and an inner cover connected to the inside of the top cover. The top cover is hinged to the pot body. The inner cover has a vent, which connects the inner pot space and the outside. The vent has a temperature detection device inside it.

[0007] In this technical solution, the pot body is provided with an inner pot, and the space inside the inner pot is located within the inner pot. During the operation of the rice cooker, the steam generated in the inner pot space is discharged to the outside of the rice cooker through the exhaust port. A temperature detection device is installed inside the exhaust port; this device can be connected to the top cover or inner cover, as long as it passes through the exhaust port. This design reduces the number of openings in the inner cover, minimizing steam and moisture leakage, maintaining a normal pressure and humidity environment inside the pot, ensuring efficient cooking and good food taste. Furthermore, it prevents damage to the durability of the fragile inner cover. For manufacturers, it reduces the difficulty of the manufacturing process and improves production efficiency; for users, it reduces cleaning difficulty and optimizes the user experience.

[0008] Furthermore, since the exhaust port is the inevitable passage for steam discharge, the steam is relatively concentrated. By placing the temperature detection device inside the exhaust port, it can accurately detect the domestic temperature and improve the accuracy of the detection results.

[0009] Furthermore, the top cover is provided with an air outlet that connects to the outside. The exhaust port and the air outlet are staggered and connected by an exhaust channel.

[0010] In this technical solution, the exhaust port is the inlet of the exhaust channel, and the air outlet is the outlet of the exhaust channel. Steam generated in the inner liner enters the exhaust channel through the exhaust port and is discharged to the outside through the air outlet. The staggered arrangement of the exhaust port and air outlet can extend the length of the exhaust channel, allowing sufficient time for bubbles in the steam to dissipate, ensuring that the bubbles are fully impacted before being discharged. This prevents foam from carrying rice water and other liquids out of the pot and causing overflow, making it easier for users to clean.

[0011] Furthermore, the exhaust channel includes a first lateral exhaust channel and a second lateral exhaust channel, the first lateral exhaust channel and the second lateral exhaust channel are connected through a vertical exhaust channel, the first lateral exhaust channel is connected to an exhaust port, and the second lateral exhaust channel is connected to an air outlet.

[0012] In this technical solution, the horizontal exhaust channel, when the lid is closed, is a horizontally extending channel, while the vertical exhaust channel is a vertically extending channel. The exhaust port is the inlet of the first horizontal exhaust channel, and the exhaust outlet is the outlet of the second horizontal channel. Steam enters the first horizontal exhaust channel from the exhaust port, then enters the second horizontal exhaust channel through the vertical exhaust channel, and finally exits to the outside from the exhaust outlet. Preferably, the first and second horizontal exhaust channels overlap at least partially in the vertical direction. The connection of the vertical exhaust channels not only further increases the length of the exhaust channels, but also increases the impact of foam by setting the path for steam to turn within the channels, preventing foam overflow. Furthermore, the partial overlap of the two horizontal exhaust channels in the vertical direction saves space, making the overall structure more compact.

[0013] Furthermore, the volume of the second transverse exhaust channel is 1.5 to 4 times that of the first transverse exhaust channel.

[0014] In this technical solution, the volume of the transverse exhaust channel, i.e., the size of the internal space of the exhaust channel, is set to be smaller than that of the second transverse exhaust channel. This allows steam to first enter the smaller space, which facilitates the mutual compression between foams and accelerates foam bursting. Then, steam enters the larger space for secondary compression. Through this double compression, the foam is eliminated before steam is discharged. Preferably, the volume of the second transverse exhaust channel is 1.8 times, 2.5 times, 3 times, or 3.5 times the volume of the second transverse exhaust channel.

[0015] Furthermore, the exhaust port and the vertical exhaust channel are located on opposite sides of the first horizontal exhaust channel.

[0016] In this technical solution, the exhaust port serves as the inlet of the first horizontal exhaust channel, and the vertical exhaust channel serves as its outlet. The inlet and outlet are located on opposite sides of the first horizontal exhaust channel, which can be understood as being located on the left and right sides, or the top and bottom sides, or respectively in the upper left and lower right corners of the first horizontal exhaust channel. Since the temperature detection device is located inside the exhaust port, if the distance between the temperature detection device and the outlet of the horizontal channel is too close, the steam flow rate will be too fast when the steam volume is large, resulting in a short residence time around the temperature detection device and affecting the detection accuracy. This solution sets a distance between the temperature detection device and the outlet of the horizontal channel, requiring the steam to travel this distance before exiting, thus avoiding the steam from exiting too quickly and affecting the detection accuracy.

[0017] Furthermore, the temperature detection device is connected to the top cover and extends through the first transverse exhaust channel and exhaust port.

[0018] In this technical solution, the temperature detection device is installed through the first transverse exhaust channel, which allows it to fully contact the steam and improve the accuracy of the detection results.

[0019] Furthermore, the side of the first transverse channel facing the top cover is connected to a vertical detection chamber, and the temperature detection device passes through the vertical detection chamber, the first transverse channel, and the exhaust port in sequence.

[0020] In this technical solution, the side of the first transverse channel facing the top cover can be understood as the vertical detection chamber located above the first transverse channel when the lid is closed. The vertical detection chamber corresponds to the exhaust port. After steam enters the transverse exhaust channel from the exhaust port, at least a portion will be guided into the vertical detection chamber, thus providing space for the steam to remain around the temperature detection device. This increases the contact time between the steam and the temperature detection device, improves the accuracy of temperature detection, provides more accurate temperature data to the control system, and ensures precise cooking of the food inside the pot.

[0021] Furthermore, the width of the vertical detection cavity decreases in a stepped manner from one end near the first transverse channel to one end near the top cover.

[0022] In this technical solution, when the lid is closed, the vertical detection cavity is wider at the bottom and narrower at the top, meaning the opening of the cavity is relatively large. This facilitates the steam to turn back and exit after entering the cavity, preventing it from staying inside for too long. This increases the time the steam stays in the temperature detection device without affecting the steam's exit to the outside due to excessive residence time, thus ensuring the normal operation of the rice cooker.

[0023] Furthermore, the material of the inner cover corresponding to the first transverse exhaust channel is transparent.

[0024] In this technical solution, the transparent material makes the first transverse exhaust channel visible, facilitating observation of its cleanliness, especially the temperature detection device. If rice residue is detected, it can be cleaned promptly, ensuring hygienic cooking. Simultaneously, it facilitates maintenance personnel's observation in case of temperature detection device malfunction. The transparent material includes, but is not limited to, glass. Compared to plastic, glass does not release harmful substances under high temperatures, offering higher safety.

[0025] Furthermore, the temperature detection device includes a detection head, and the opening area of ​​the exhaust port is 1.5 to 5 times the cross-sectional area of ​​the detection head.

[0026] In this technical solution, the cross-section of the detection head refers to the cross-section perpendicular to the detection head. Since the detection head of the temperature detection device occupies a certain space within the exhaust port, if the opening area of ​​the exhaust port is too small, it will affect the rate at which steam enters the exhaust channel; if the opening area of ​​the exhaust port is too large, the steam will be discharged too quickly, which is not conducive to temperature detection and will also affect the pressure and humidity environment inside the pot. Therefore, setting an appropriate ratio between the cross-sectional area of ​​the detection head and the opening of the exhaust port can ensure a normal steam discharge rate, maintain the micro-pressure and humidity environment inside the pot, and ensure accurate temperature detection. For example, the opening area of ​​the exhaust port is 2, 3, or 4 times the cross-sectional area of ​​the detection head, etc.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] (1) This utility model reduces the openings in the inner lid, reduces the leakage of steam and moisture, maintains the normal pressure and humidity environment inside the pot, ensures the efficiency of cooking food and the taste of food. At the same time, it can avoid affecting the durability of the inner lid made of fragile materials. For manufacturers, it reduces the difficulty of production and manufacturing process and improves production efficiency. For users, it also reduces the difficulty of cleaning and optimizes the user experience.

[0029] (2) The present invention places the temperature detection device inside the exhaust port, which can accurately detect the temperature in the country and improve the accuracy of the detection results.

[0030] (3) The staggered arrangement of the exhaust port and the outlet port of this utility model can extend the length of the exhaust channel, provide sufficient time for the bubbles in the steam to be eliminated, and allow the bubbles to be discharged after sufficient impact, thus avoiding the overflow of the pot caused by the foam carrying rice soup and other liquids. This makes it convenient for users to clean. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the pot lid of this utility model.

[0032] Figure 2 for Figure 1 A magnified view of point A.

[0033] Figure 3 This is a schematic diagram of the structure of the pot lid of this utility model.

[0034] Figure 4 for Figure 1 Cross-sectional view at point AA.

[0035] Figure 5 This is a schematic diagram of the structure of the first horizontal exhaust channel and the vertical exhaust channel of this utility model.

[0036] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0037] Figure 7 This is a schematic diagram of the second transverse exhaust channel of this utility model.

[0038] Reference numerals: Top cover 100, air outlet 110, inner cover 200, exhaust port 210, temperature detection device 220, first horizontal exhaust channel 300, vertical detection chamber 310, second horizontal exhaust channel 400, vertical exhaust channel 500. Detailed Implementation

[0039] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] Example 1

[0041] refer to Figure 1 and Figure 2 This embodiment provides a lid for a rice cooker. The rice cooker includes a pot body with an inner pot space. The lid includes a top cover 100 and an inner cover 200 connected to the inside of the top cover 100. The top cover 100 is hinged to the pot body. The inner cover 200 has a vent 210 that connects the inner pot space to the outside. A temperature detection device 220 is provided inside the vent 210. Preferably, the vent is located in the middle of the inner cover 200.

[0042] In this embodiment, the pot body is provided with an inner pot, and the space inside the inner pot is located inside the inner pot. During the operation of the rice cooker, the steam generated in the inner pot space is discharged to the outside of the rice cooker through the exhaust port 210. The exhaust port 210 is provided with a temperature detection device 220. It can be understood that the temperature detection device 220 can be connected to the top cover 100 or the inner cover 200, as long as it passes through the exhaust port 210. This design can reduce the openings in the inner cover 200, reduce the leakage of steam and moisture, maintain a normal pressure and humidity environment inside the pot, ensure the efficiency of cooking food and the taste of the food, and at the same time, prevent the durability of the fragile inner cover 200 from being affected; for manufacturers, it reduces the difficulty of the manufacturing process and improves production efficiency; for users, it also reduces the difficulty of cleaning and optimizes the user experience.

[0043] Furthermore, since the exhaust port 210 is the necessary passage for steam discharge and the steam is relatively concentrated, placing the temperature detection device 220 inside the exhaust port 210 can accurately detect the domestic temperature and improve the accuracy of the detection results.

[0044] refer to Figures 1 to 7 The top cover 100 is provided with an air outlet 110 communicating with the outside. The exhaust port 210 and the air outlet 110 are staggered and connected by an exhaust channel. The exhaust channel includes a first horizontal exhaust channel 300 and a second horizontal exhaust channel 400, which are connected by a vertical exhaust channel 500. The first horizontal exhaust channel 300 is connected to the exhaust port 210, and the second horizontal exhaust channel 400 is connected to the air outlet 110. The volume of the second horizontal exhaust channel 400 is 1.5 to 4 times the volume of the first horizontal exhaust channel 300. For example, the volume of the second horizontal exhaust channel 400 is 2 or 3 times the volume of the first horizontal exhaust channel 300, etc.

[0045] refer to Figure 1 , Figure 5 and Figure 6 The exhaust port 210 and the vertical exhaust channel 500 are located on opposite sides of the first horizontal exhaust channel 300. In this embodiment, they are located on the left and right sides of the first horizontal exhaust channel 300. The temperature detection device 220 is connected to the top cover 100 and passes through the first horizontal exhaust channel 300 and the exhaust port 210. Specifically, a vertical detection cavity 310 is connected to the side of the first horizontal channel facing the top cover 100, and the temperature detection device 220 passes through the vertical detection cavity 310, the first horizontal channel, and the exhaust port 210 in sequence. The width of the vertical detection cavity 310 decreases in a stepped manner from one end near the first horizontal channel to one end near the top cover 100.

[0046] The material at the point where the inner cover 200 corresponds to the first transverse exhaust channel 300 is transparent.

[0047] refer to Figure 2 The temperature detection device 220 includes a detection head, and the opening area of ​​the exhaust port 210 is 1.5 to 5 times the cross-sectional area of ​​the detection head.

[0048] In this embodiment, the cross-section of the detection head refers to the cross-section perpendicular to the detection head. Since the detection head of the temperature detection device 220 occupies a certain space within the exhaust port 210, if the opening area of ​​the exhaust port 210 is too small, it will affect the rate at which steam enters the exhaust channel; if the opening area of ​​the exhaust port 210 is too large, the steam will be discharged too quickly, which is not conducive to temperature detection and will also affect the pressure and humidity environment inside the pot. Therefore, setting an appropriate ratio between the cross-sectional area of ​​the detection head and the opening of the exhaust port 210 can ensure a normal steam discharge rate, maintain the micro-pressure and humidity environment inside the pot, and ensure accurate temperature detection. For example, the opening area of ​​the exhaust port 210 is 2, 3, or 4 times the cross-sectional area of ​​the detection head, etc.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lid of an electric rice cooker, the electric rice cooker comprising a cooker body having an inner container space formed therein, the lid comprising a top cover and an inner cover connected to an inner side of the top cover, the top cover being hingedly connected to the cooker body, characterized in that, The inner cover is provided with an exhaust port, which connects the inner liner space and the outside. A temperature detection device is provided inside the exhaust port.

2. The electric rice-cooker cover according to claim 1, wherein The top cover is provided with an air outlet that connects to the outside. The exhaust port and the air outlet are staggered and connected by an exhaust channel.

3. The electric rice-cooker cover according to claim 2, wherein The exhaust channel includes a first horizontal exhaust channel and a second horizontal exhaust channel, which are connected by a vertical exhaust channel. The first horizontal exhaust channel is connected to an exhaust port, and the second horizontal exhaust channel is connected to an air outlet.

4. The electric rice-cooker cover according to claim 3, wherein The volume of the second transverse exhaust channel is 1.5 to 4 times that of the first transverse exhaust channel.

5. The electric rice-cooker cover according to claim 3, wherein The exhaust port and the vertical exhaust channel are located on opposite sides of the first horizontal exhaust channel.

6. The lid of the rice cooker according to claim 3, characterized in that, The temperature detection device is connected to the top cover and extends through the first transverse exhaust channel and exhaust port.

7. The lid of the rice cooker according to claim 6, characterized in that, The side of the first transverse exhaust channel facing the top cover is connected to a vertical detection chamber, and the temperature detection device passes through the vertical detection chamber, the first transverse exhaust channel and the exhaust port in sequence.

8. The lid of the rice cooker according to claim 7, characterized in that, The width of the vertical detection cavity decreases in a stepped manner from one end near the first transverse exhaust channel to one end near the top cover.

9. The lid of the rice cooker according to any one of claims 3 to 8, characterized in that, The material at the point where the inner cover corresponds to the first transverse exhaust channel is transparent.

10. The lid of the rice cooker according to any one of claims 1 to 8, characterized in that, The temperature detection device includes a detection head, and the opening area of ​​the exhaust port is 1.5 to 5 times the cross-sectional area of ​​the detection head.

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