Rice cooking utensil

Abstract

The utility model provides a rice cooking utensil which comprises a shell, a cooking utensil body, a cooking utensil cover, a cooking utensil cover, a cooking utensil cover, a cooking utensil cover and a cooking utensil cover. The inner pot is arranged in the inner space defined by the protection frame, and a ventilation gap is formed between the side face of the inner pot and the protection frame; the heater is located below the inner pot, and the heating surface of the heater is in contact with the bottom surface of the inner pot to heat the inner pot; the fan is used for generating cooling airflow; the air outlet is positioned in the center below the bottom of the inner pot and is opened towards the bottom surface of the inner pot; at least one part of the air guide box cover plate is located in the air outlet, the air guide box cover plate is provided with an opening part facing the bottom face of the inner pot, and at least one of the heating face of the heater and the bottom face of the inner pot is provided with a ventilation groove. According to the utility model, the ventilation channel for the cooling air flow for cooling the inner pot to pass through can be reliably formed, the cooling time is shortened, and consumers can intuitively know the function.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cooking utensils, with inner pot, the inner pot contained by cooking utensils can be efficiently cooled. BACKGROUND

[0002] As a typical cooking utensil, for example, electric rice cooker can be listed.In the market at present, electric rice cooker uses coated inner pot, and the coating has the defect of toxic release in high-temperature dry burning.Consumers pay more and more attention to health, and the electric rice cooker with no coating becomes a trend.In the prior art, there are structures using side air cooling, water channel cooling inside the heater, etc.

[0003] If using no-coated inner pot, the electric rice cooker has the problem of rice sticking to the pot.Therefore, there is the following patent document 1, which blows cooling air flow to the side of the inner pot to cool the inner pot, and sets up a water flow passage in the heater to perform water cooling, so as to avoid sticking to the pot.For IH electric rice cooker (non-contact heating), there is also a cooling structure of blowing air to the bottom of the no-coated inner pot, but for microcomputer electric rice cooker (contact heating), the heater structure is different from that of IH electric rice cooker, and for microcomputer electric rice cooker, how to efficiently cool the no-coated inner pot has not been further studied.

[0004] In addition, for the electric rice cooker capable of blowing cooling air flow to the center of the pot bottom of the inner pot, there is currently no research on how to make consumers more intuitively understand its function.

[0005] Prior art documents

[0006] Patent documents

[0007] Patent document 1: CN114305072A Utility model content

[0008] Problems to be solved by the utility model

[0009] The utility model provides a kind of cooking utensils in view of the above situation, which has contact type heater, can reliably form the ventilation channel through which the cooling air flow for cooling the inner pot passes, shorten the cooling time, and also can make consumers intuitively understand this function.

[0010] Solution for solving the problem

[0011] The utility model discloses a cooking utensil, its characterized in that, including: the casing, the casing has the protection frame in, the protection frame is the open cylinder of upper end, the inner pot, the inner pot sets up in the inside space by the protection frame demarcation, forms the ventilation gap between the side of inner pot and the protection frame, the heater, the heater is located the lower of inner pot, the heating surface of heater is contacted with the bottom surface of inner pot to heat the inner pot, the fan, the fan is used to produce cooling airflow, the air outlet, the air outlet is located the central place below the pot bottom of inner pot, and the opening is towards the bottom surface of inner pot, and the air guide box cover plate, at least one part of air guide box cover plate is located in the air outlet and has the opening portion towards the bottom surface of inner pot, and is provided with ventilation groove in at least one of the heating surface of heater and the bottom surface of inner pot.

[0012] Preferably, the cooking utensil further comprises: an air guide box, the air guide box is located below the air outlet, and the cooling airflow generated by the fan is guided to the air outlet, and the air guide box cover plate is arranged on the air guide box or the protection frame.

[0013] Preferably, the air guide box cover plate is in contact with the heater.

[0014] Preferably, the fan is arranged below or on the side of the inner pot.

[0015] Preferably, the cooking utensil further comprises: a sensor, the sensor is arranged on the air guide box, and a ventilation channel is formed between the sensor and the air guide box cover plate.

[0016] Preferably, the opening portion has a plurality of opening portions, and the plurality of opening portions are uniformly distributed around the sensor.

[0017] Preferably, there is an air outlet gap between the air guide box cover plate and the sensor.

[0018] Preferably, the air guide box has a spiral structure to spiral air supply.

[0019] Preferably, the air guide box is fixed on the protection frame, and the fan is fixed on the protection frame or fixed on the air guide box.

[0020] Preferably, a blocking rib is arranged on the air guide box, and the blocking rib is arranged between the heater and the fan.

[0021] Preferably, the heater is provided with a heater rib protruding downward, and the heater rib is in contact with the air guide box cover plate.

[0022] Preferably, the sensor can move up and down according to whether the inner pot is put in or not, the heater is provided with a heater rib protruding towards the lower side, the air guide box cover plate is provided with a heater rib hole, the heater rib protrudes towards the lower side via the heater rib hole, when the inner pot is put in, the sensor does not contact the heater rib and forms a ventilation passage, when the inner pot is taken out, the sensor contacts the heater rib and does not form a ventilation passage.

[0023] Preferably, the heater rib has a plurality, and the plurality of heater ribs are uniformly distributed around the air outlet, the heater rib hole has a plurality, and the plurality of heater rib holes are uniformly distributed corresponding to the plurality of heater ribs.

[0024] Preferably, the air guide box cover plate is integrally formed with the protection frame, or the air guide box, the air guide box cover plate, the sensor and the fan are assembled into an integral whole, and the integral whole is fixed to the protection frame.

[0025] Preferably, the air outlet is annular.

[0026] Effect of the utility model

[0027] The rice cooking appliance of the utility model can reliably form a ventilation passage for cooling air flow passing through the inner pot, shorten the cooling time, and enable consumers to intuitively understand this function. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of the rice cooking appliance of the present application, and the path of the cooling air flow is shown by an arrow.

[0029] Figure 2 is a bottom view of the air guide box of the rice cooking appliance of the present application.

[0030] Figure 3 is a top view of the heater of the rice cooking appliance of the present application.

[0031] Figure 4 is a sectional view of the ventilation passage of the rice cooking appliance of the present application.

[0032] Figure 5 is a sectional view of one embodiment of the air guide box cover plate of the rice cooking appliance of the present application.

[0033] Figure 6 is a sectional view of another embodiment of the air guide box cover plate of the rice cooking appliance of the present application.

[0034] Figure 7 is a top view of one embodiment of the air guide box cover plate of the rice cooking appliance of the present application.

[0035] Figure 8 is a top view of another embodiment of the air guide box cover plate of the rice cooking appliance of the present application.

[0036] Figure 9 is a schematic view of a heater having a heater rib of the rice cooking appliance of the present application.

[0037] Figure 10 is a perspective view showing the air guide box, the air guide box cover plate, the sensor, and the fan assembled as a whole of the present application.

[0038] Figure 11 is a perspective view showing the air guide box cover plate and the protection frame formed as a whole of the present application.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 1, housing; 2, inner pot; 3, protection frame; 4, heater; 5, fan; 6, air guide box; 7, ventilation gap; 8, spring; 9, sensor; 10, ventilation hole, 61, air inlet flow path; 62, cylindrical portion; 63, buckle; 64, blocking rib; 11, air guide box cover plate; 12, heater rib hole; 13, opening portion; 14, air outlet gap; 41, ventilation groove; 42, heater rib. DETAILED DESCRIPTION

[0041] The structure of the present application will be described in detail below based on the drawings, but the following description is not intended to limit the present application, and each component of the technical solution can be changed, replaced, combined, deleted, etc. without departing from the main idea of the present application.

[0042] <General structure of the rice cooking appliance>

[0043] In Figure 1 , a front cross-sectional view of the rice cooking appliance 100 of the present application is shown, which can be an electric rice cooker as a typical example of the rice cooking appliance 100. As shown in Figure 1 , the rice cooking appliance 100 includes a housing 1 constituting an outer shell of the rice cooking appliance 100, the housing 1 having a protection frame 3 in the form of a cylinder with an open upper end inside, and an inner pot 2 disposed in an internal space defined by the protection frame 3, the protection frame 3 protecting the housing 1 from the inner pot 2, a ventilation gap 7 being formed between the side surface of the inner pot 2 and the protection frame 3.

[0044] As shown in Figure 1As shown, the rice cooker 100 further has a heater 4, for example, a contact type microcomputer heater, which is located inside the protection frame 3 and below the inner pot 2 when the inner pot 2 is placed in the protection frame 3, and the heating surface of the heater 4 is in contact with the bottom surface of the inner pot 2 to heat the inner pot; a fan 5 for generating cooling air flow, which is located inside the housing 1 and below (including directly below and laterally below) the inner pot 2, but is not limited thereto, and can be located laterally to the inner pot 2 (i.e., the fan 5 corresponds to the inner pot 2 in the up-down direction); and a cover which is installed on the housing 1 in an openable manner, and when the cover is installed on the housing 1, the cover closes the upper end of the protection frame 3, i.e., closes the inner space of the inner pot 2, and when the rice cooker 100 is working, the inner pot 2 is in a closed state, and after the work is completed, the cover can be opened, and the inner pot 2 is in an open state.

[0045] <COOLING STRUCTURE OF INNER POT>

[0046] The inner pot 2 is, for example, a non-coated inner pot, and in order to prevent the phenomenon of rice sticking to the inner pot 2 on the inner side during the working process of the rice cooker 100, the rice cooker 100 needs to have a cooling structure for the inner pot 2 in the housing 1. The following describes the cooling structure of the present application based on Figures 1-4 .

[0047] As shown in Figure 1 , the heater 4 has an opening in the central region thereof, which is for the sensor 9 to be described later to enter, and the sensor 9 entering the opening can be in contact with the bottom of the inner pot 2, so as to detect the temperature of the bottom of the inner pot 2. A blowout opening 10 is provided at the center below the bottom of the inner pot 2, and the blowout opening 10 is open toward the bottom surface of the inner pot 2. The blowout opening 10 can be, for example, an opening formed by the gap between the heater 4 and the sensor 9, and the blowout opening 10 is annular. It can also be an opening formed by the gap between the heater 4 and other components. It should be noted that the blowout opening 10 provided at the center below the bottom of the inner pot 2 can be the exact center below the bottom, or can be at the approximate center near the exact center.

[0048] As shown in Figure 2 , the protection frame 3 has a through hole at the center of the lower surface thereof (which can correspond to the center of the bottom of the inner pot 2), and the protection frame 3 is provided with a whole circumference flange 31 (see Figure 4 ) around the through hole. Thus, the central opening of the heater 4 corresponds to the central through hole of the protection frame 3, so that the bottom of the inner pot 2 is in communication with the outside of the protection frame 3. In addition, as shown in Figure 4As shown, by forming the whole circumference flange 31 around the through hole of the protection frame 3, the central through hole of the protection frame 3 can be close to or even continuous with the central opening of the heater 4, that is, the whole circumference flange 31 can abut against the outer circumference portion of the central opening of the heater 4, but it can also not abut (for example Figure 4 The whole circumference flange 31 in the protection frame 3 does not abut against the heater 4, which does not affect the formation of the ventilation passage described later).

[0049] As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5. Figure 1 As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5.

[0050] As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5. Figure 1 Figure 2 As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5. Figure 2 As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5.

[0051] As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5. Figure 2 As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5.

[0052] As shown, the rice cooker 100 has a fan 5 and a protection frame 3, the fan 5 is arranged in the lower portion of the inner pot 2, and the protection frame 3 is arranged around the fan 5. Figure 1 Figure 4 ​​As shown, the sensor 9 is arranged above the air guide box 6, and the sensor 9 is capable of detecting temperature by contacting the bottom of the inner pot 2. The sensor 9 is installed on the air guide box 6 in a manner of being able to move up and down by means of the sensor fixing buckle 63 on the upper portion of the air guide box 6, and the spring 8 is arranged between the sensor 9 and the air guide box 6. After the sensor 9 and the air guide box 6 are combined together, the air guide box 6 is installed on the lower surface of the protection frame 3, the sensor 9 is extended into the protection frame 3 through the central through hole of the protection frame 3 and the central opening of the heater 4, and at least a portion of the air guide box 6 is located in the through hole of the protection frame 3 and is surrounded by the whole circumferential flange 31, so that the ventilation passage is formed between the air guide box 6 and the protection frame 3, the ventilation passage is formed between the sensor 9 and the protection frame 3, and the ventilation passage is formed between the sensor 9 and the heater 4. Alternatively, the cylindrical portion 62 of the air guide box 6 can be formed upwardly to a height corresponding to the heater 4, the ventilation passage is formed between the air guide box 6 and the heater 4, and the ventilation passage is formed between the sensor 9 and the heater 4.

[0053] When the inner pot 2 is not placed in the protection frame 3, the sensor 9 is lifted upwardly by the spring 8, the distance between the sensor 9 and the air guide box 6 is increased, and the sensor 9 is extended upwardly from the central opening of the heater 4 to a position higher than the heater 4. When the inner pot 2 is placed in the protection frame 3, the bottom of the inner pot 2 first contacts the upper shell 91 of the sensor 9, and then presses the sensor 9 downwardly against the force of the spring 8 until the bottom of the inner pot 2 contacts the heater 4. That is, the sensor 9 can move up and down according to whether the inner pot 2 is placed or not.

[0054] In Figure 4 , the state of the sensor 9 when the inner pot 2 is placed in the protection frame 3 is shown, but the illustration of the inner pot 2 is omitted. As Figure 4 shown, when the inner pot 2 is placed in the protection frame 3, air is sucked from the outside with the operation of the fan 5, and the air enters the air guide box 6 as cooling air flow, the cooling air flow passes through the ventilation passages in sequence, i.e. between the air guide box 6 and the protection frame 3, between the sensor 9 and the protection frame 3, and between the sensor 9 and the heater 4, and then is discharged through the air outlet 10, so as to cool the center of the bottom of the inner pot 2.

[0055] As Figure 3 shown, the ventilation groove 41 is arranged on the heating surface of the heater 4, so that the cooling air flow sent to the center of the bottom can flow to the side surface of the inner pot 2 through the space between the inner pot 2 and the heater 4, so as to make the cooling air flow flow from the center of the bottom of the inner pot 2 to the side surface of the inner pot 2. Figure 1As shown by the arrow in the drawing, after the cooling air current passes between the inner pot 2 and the heater 4, it is discharged to the outside of the rice cooker 100 through the ventilation gap 7 between the side surface of the inner pot 2 and the protection frame 3. The ventilation groove can also be formed in the bottom surface of the inner pot 2, i.e., at least one of the heating surface of the heater 4 and the bottom surface of the inner pot 2 is formed with a ventilation groove.

[0056] The ventilation groove 41 formed in the heater 4 does not need to be formed to communicate with the air outlet 10. The heating surface of the heater 4 and the pot bottom of the inner pot 2 are mostly non-horizontal surfaces. When the inner pot 2 is placed on the heater 4, there is a case where a gap can be formed between the heater 4 and the inner pot 2 even if the ventilation groove 41 is not formed. Therefore, as long as the cooling air current can pass between the heater 4 and the inner pot 2, the ventilation groove 41 can not be formed. However, in order to ensure the passage area of the cooling air current passing between the heater 4 and the inner pot 2 and further improve the cooling capacity, it is preferable that at least one of the heating surface of the heater 4 and the bottom surface of the inner pot 2 is formed with a ventilation groove.

[0057] <cover plate of the air guide box>

[0058] The protection frame 3 can also include a cover plate 11 of the air guide box. The cover plate 11 of the air guide box is a cover plate that can be installed on the air guide box 6. In this case, the protection frame 3 does not have the entire circumferential edge 31, and the cover plate 11 of the air guide box is installed on the portion of the air guide box 6 that enters the through hole of the protection frame 3. Alternatively, the cover plate 11 of the air guide box can be provided to the protection frame 3.

[0059] As shown in FIGS. 1 and 2, the cover plate 11 of the air guide box has an upper end cover plate 15 that protrudes upward. The upper end cover plate 15 is formed, for example, in a circular shape as viewed from above, has a through hole in the central portion thereof through which the sensor 9 can protrude, and has a size as viewed from above that is smaller than the central opening of the heater 4. Thus, the upper end cover plate 15 (at least a portion of the cover plate 11 of the air guide box) can be positioned in the air outlet 10 (for example, between the sensor 9 and the heater 4), and the upper surface of the upper end cover plate 15 has an opening portion 13 that opens toward the bottom surface of the inner pot. Figure 5 Figure 7 As shown in FIGS. 1 and 2, the cover plate 11 of the air guide box has an upper end cover plate 15 that protrudes upward. The upper end cover plate 15 is formed, for example, in a circular shape as viewed from above, has a through hole in the central portion thereof through which the sensor 9 can protrude, and has a size as viewed from above that is smaller than the central opening of the heater 4. Thus, the upper end cover plate 15 (at least a portion of the cover plate 11 of the air guide box) can be positioned in the air outlet 10 (for example, between the sensor 9 and the heater 4), and the upper surface of the upper end cover plate 15 has an opening portion 13 that opens toward the bottom surface of the inner pot.

[0060] As shown in FIGS. 1 and 2, the cover plate 11 of the air guide box has an upper end cover plate 15 that protrudes upward. The upper end cover plate 15 is formed, for example, in a circular shape as viewed from above, has a through hole in the central portion thereof through which the sensor 9 can protrude, and has a size as viewed from above that is smaller than the central opening of the heater 4. Thus, the upper end cover plate 15 (at least a portion of the cover plate 11 of the air guide box) can be positioned in the air outlet 10 (for example, between the sensor 9 and the heater 4), and the upper surface of the upper end cover plate 15 has an opening portion 13 that opens toward the bottom surface of the inner pot. Figure 5 Figure 3 As shown in FIGS. 1 and 2, the cover plate 11 of the air guide box has an upper end cover plate 15 that protrudes upward. The upper end cover plate 15 is formed, for example, in a circular shape as viewed from above, has a through hole in the central portion thereof through which the sensor 9 can protrude, and has a size as viewed from above that is smaller than the central opening of the heater 4. Thus, the upper end cover plate 15 (at least a portion of the cover plate 11 of the air guide box) can be positioned in the air outlet 10 (for example, between the sensor 9 and the heater 4), and the upper surface of the upper end cover plate 15 has an opening portion 13 that opens toward the bottom surface of the inner pot. Figure 7 ​​As can be seen, in the case where the air guide box cover plate 11 is not provided, the air outlet 10 serves as a gap between the heater 4 and the sensor 9, and the air outlet 10 cannot be immediately recognized by the customer as having the air cooling function, and can be merely regarded as a gap between components, and it can be difficult to explain the function to the customer by the salesperson of the product, and the customer's purchase enthusiasm can be lost. However, in the case where the air guide box cover plate 11 is provided, the opening portion 13 is formed by opening the upper end plate 15, and the customer can immediately recognize the air outlet having the air cooling function when viewing the opening portion 13, and the salesperson can easily explain the advantages and functions of the product to the customer, and the purchase enthusiasm of the customer can be improved.

[0061] Further, as shown in Figure 5 , the air outlet gap 14 can be provided between the upper end plate 15 and the upper housing 91 of the sensor 9, and the air outlet gap 14 can assist in the discharge of the cooling airflow and ensure the cooling capacity. As shown in Figure 7 , the opening portion 13 is provided in a plurality of numbers, and the plurality of opening portions 13 are uniformly distributed around the sensor 9.

[0062] As shown in Figure 5 , the lower end plate 16 of the air guide box cover plate 11 is also formed in a circular shape in plan view, and the upper portion of the lower end plate 16 is continuously formed with the lower portion of the upper end plate 15, and thus the upper end plate 15 and the lower end plate 16 are integrally formed. The size of the lower end plate 16 in plan view is larger than the size of the upper end plate 15 in plan view, and the upper portion of the lower end plate 16 extends outwardly from the lower portion of the upper end plate 15 and then extends downwardly. The lower portion of the lower end plate 16 is fixed to the air guide box 6, and thus the air guide box cover plate 11 can be fixed to the air guide box 6, and the lower end plate 16 is located between the heater 4 and the air guide box 6. Alternatively, the lower portion of the lower end plate 16 can be fixed to the bottom surface of the protection frame 3, and thus the air guide box cover plate 11 can be fixed to the bottom surface of the protection frame 3, and the lower end plate 16 is located between the heater 4 and the bottom surface of the protection frame 3. As shown in Figure 5 , Figure 6 , a ventilation passage is formed between the sensor 9 and the air guide box cover plate 11, and specifically, the ventilation passage for the cooling airflow is formed between the upper housing 91 of the sensor 9 and the upper end plate 15 and the lower end plate 16 of the air guide box cover plate 11.

[0063] Further, as shown in Figure 5 , a blocking rib 64 is provided on the air guide box 6, and the blocking rib 64 is provided between the heater 4 and the fan 5. Thus, the influence of the heat of the heater 4 on the fan 5 can be prevented.

[0064] In Figure 5 , Figure 7 and Figure 6 , Figure 8Two different forms of the air guide box cover plate 11 are shown in FIGS. 1 and 2. In FIG. 1, the heater 4 is provided with a heater rib 42 that protrudes downward, and in Figure 5 FIG. 3 shows a structure in which the air guide box cover plate 11 is provided with a heater rib hole 12, and the heater rib 42 protrudes downward via the heater rib hole 12. In this case, the heater rib 42 can or can not be in contact with the air guide box cover plate 11. Figure 6 FIG. 4 shows a structure in which the heater rib hole 12 is not formed, and the heater rib 42 is in contact with the air guide box cover plate 11.

[0065] As shown in FIG. 5, the heater rib 42 is exposed via the heater rib hole 12. When the sensor 9 moves downward as the inner pot 2 is placed, the outer periphery of the upper housing 91 of the sensor 9 is separated from the air guide box cover plate 11 (and the heater rib 42 exposed from the heater rib hole 12), and the two are not in contact with each other, thereby forming a ventilation passage. Thus, when the inner pot 2 is placed, the ventilation passage can be ensured to be unobstructed. Figure 5

[0066] When the inner pot 2 is removed from the protective frame 3, the external force that overcomes the spring 8 disappears, and the force of the spring 8 itself causes the sensor 9 to rise. Thus, the outer periphery of the upper housing 91 of the sensor 9 also rises and comes into contact with the air guide box cover plate 11 (and the heater rib 42 exposed from the heater rib hole 12). Thus, the sensor 9 can come into contact with the heater rib 42 of the heater 4 in the no-pot state, and the temperature of the heater 4 can be detected. If an abnormal temperature of the heater 4 is detected, the heater 4 is controlled to stop operating. Thus, heating protection of the heater 4 is achieved. In addition, when the inner pot 2 is removed, the sensor 9 is in contact with the heater rib 42, and thus the ventilation passage is not formed.

[0067] In Figure 6 , Figure 8 FIG. 4 shows a structure in which the heater rib hole 12 is not formed, and the heater rib 42 is in contact with the air guide box cover plate 11. Figure 5 As shown in FIG. 5, the heater rib 42 is exposed via the heater rib hole 12. When the sensor 9 moves downward as the inner pot 2 is placed, the outer periphery of the upper housing 91 of the sensor 9 is separated from the air guide box cover plate 11 (and the heater rib 42 exposed from the heater rib hole 12), and the two are not in contact with each other, thereby forming a ventilation passage. Thus, when the inner pot 2 is placed, the ventilation passage can be ensured to be unobstructed.

[0068] ​When the inner pot 2 is taken out from the protective frame 3, the external force overcoming the spring 8 disappears, and the force of the spring 8 itself makes the sensor 9 rise, thus the outer periphery of the upper shell 91 of the sensor 9 also rises and contacts the air guide box cover plate 11. Thus, the sensor 9 can contact the air guide box cover plate 11 in the no-pot state, and since the heater rib 42 of the heater 4 contacts the air guide box cover plate 11, the sensor 9 can also detect the temperature of the heater 4 via the air guide box cover plate 11, and if an abnormal temperature of the heater 4 is detected, the heater 4 is controlled to stop working. Thus, the heating protection of the heater 4 is realized. In addition, when the inner pot 2 is taken out, since the sensor 9 contacts the air guide box cover plate 11, the ventilation channel is not formed.

[0069] Compared with the structure shown in Figure 6 , the structure shown in Figure 5 , the sensor 9 can directly contact the heater rib 42 exposed via the heater rib hole 12, thus, Figure 5 , the structure shown in Figure 6 is superior to the structure shown in .

[0070] Figure 9 is a perspective view of the heater 4 from the bottom. In Figure 9 , the four heater ribs 42 formed downwardly protruding (upwardly protruding in Figure 9 ) are shown, and the four heater ribs 42 are uniformly distributed around the air outlet 10, and the four heater ribs 42 can be inserted into the four heater rib holes 12 shown in Figure 7 , which are uniformly distributed corresponding to the four heater ribs 42. However, the number of heater ribs 42 and heater rib holes 12 is not limited to this, and other numbers are also possible.

[0071] [Other structures] [Other structures]

[0072] In the present application, as shown in Figure 10 , the air guide box 6, the air guide box cover plate 11, the sensor 9, and the fan 5 can be assembled into one whole, and after the above four are assembled into one whole, the above components can be installed in the protective frame 3 at one time, which can improve the assembly compared with the case of separately installing the above four in the protective frame 3.

[0073] In addition, as shown in Figure 11 , the air guide box cover plate 11 can be integrally formed with the protective frame 3. At this time, as in the case of installing the air guide box 6, the sensor 9, and the fan 5 to the protective frame 3, the assembly will not become complicated due to the addition of the component of the air guide box cover plate 11.

[0074] [Effects]

[0075] By the feature that there is a gap between the inner pot 2 and the heater 4 of the microcomputer electric rice cooker (contact type heater), the temperature of the outer surface of the inner pot 2 is relatively easy to reduce. By setting a fan 5 below, after the rice is cooked, the fan 5 is turned on, and the cooling air flows through the gap between the bottom of the inner pot 2 and the heater 4, spreading from the middle to the four corners of the inner pot 2, blowing the hot air from the bottom to the edge of the pot. The temperature of the outer surface of the inner pot 2 is accelerated to drop, and dew is formed between the rice and the inner pot 2, separating the rice and the inner pot 2 by a layer of water, achieving the effect of not sticking.

[0076] In addition, the present application utilizes the gap between the air guide box 6 and the protective frame 3 to form a ventilation channel. If only the air guide box 6 is used to directly guide the cooling air out to the bottom of the inner pot 2, the air guide box 6 needs to be set larger in the up-down direction at this time, and such a structure does not make full use of other components that the rice cooker already has. In addition, if a sensor 9 is installed in such a structure, the sensor 9 needs to be installed inside the air guide box 6, which makes the installation of the sensor 9 more difficult. In the present application, the air guide box 6 is not used to directly guide the cooling air to the bottom of the inner pot 2, that is, the air guide box 6 is not used alone to guide the cooling air, but based on the structure of the air guide box 6, the protective frame 3 (which can further include components such as the heater 4 and the sensor 9), a ventilation channel is formed, thereby making full use of other components that the rice cooker already needs to set. And when the sensor 9 needs to be installed, the sensor 9 can be installed conveniently.

[0077] In addition, as described above, by having an air guide box cover plate, customers can clearly understand the air outlet function of the product pot bottom, improving the willingness of customers to purchase. And the opening part 13 on the air guide box cover plate 11 can be set in different forms as needed, for example, the opening part 13 is inclined as it extends in the circumferential direction, and / or the opening part 13 is higher inside and lower outside, etc., which can appropriately select the desired air outlet form to seek better cooling effect.

[0078] In the case of a non-coated inner pot 2, the rice can be prevented from sticking to the inner pot while ensuring that customers use a healthier product, and the time needed for cooling can be shortened, improving the working efficiency of the product.

Claims

1. A rice cooking appliance, characterized by comprising: Comprising: a housing having a protection frame inside, the protection frame being a cylinder with an open upper end; an inner pot arranged in an internal space defined by the protection frame, a ventilation gap being formed between the side of the inner pot and the protection frame; a heater located below the inner pot, a heating surface of the heater being in contact with the bottom surface of the inner pot to heat the inner pot; a fan for generating a cooling air flow; an air outlet located at the center below the pot bottom of the inner pot, opening toward the bottom surface of the inner pot; and a guide box cover plate, at least a portion of the guide box cover plate being located in the air outlet and having an opening portion opening toward the bottom surface of the inner pot, a ventilation groove being provided in at least one of the heating surface of the heater and the bottom surface of the inner pot.

2. The rice cooker according to claim 1, further comprising: a guide box located below the air outlet to guide the cooling air flow generated by the fan to the air outlet, the guide box cover plate being provided on the guide box or the protection frame.

3. The rice cooker according to claim 1, wherein: the guide box cover plate is in contact with the heater.

4. The rice cooker according to claim 1, wherein: the fan is arranged below or laterally relative to the inner pot.

5. The rice cooker according to claim 1, further comprising: a sensor provided on the guide box, a ventilation passage being formed between the sensor and the guide box cover plate.

6. The rice cooker according to claim 5, wherein: the opening portion has a plurality of opening portions, the plurality of opening portions being uniformly distributed around the sensor.

7. The rice cooker according to claim 6, wherein: an air outlet gap is provided between the guide box cover plate and the sensor.

8. The rice cooker according to claim 1, wherein: the guide box has a spiral structure to spiral air supply.

9. The rice cooker according to claim 1, wherein: the guide box is fixed to the protection frame, the fan is fixed to the protection frame or the guide box.

10. The rice cooker according to claim 1, wherein: a blocking rib is provided on the guide box, the blocking rib being arranged between the heater and the fan.

11. The rice cooker according to claim 1, wherein: a heater rib protruding downward is provided on the heater, the heater rib is in contact with the guide box cover plate.

12. The rice cooker according to claim 5, wherein: the sensor is movable up and down according to whether the inner pot is placed or not, a heater rib protruding downward is provided on the heater, a heater rib hole is provided on the guide box cover plate, the heater rib protruding downward via the heater rib hole, when the inner pot is placed, the sensor is not in contact with the heater rib and a ventilation passage is formed, ​ ​ ​ When the inner pot is taken out, the sensor is in contact with the heater rib without forming a ventilation passage.

13. The rice cooker according to claim 12, wherein The heater rib has a plurality, and the plurality of heater ribs are uniformly distributed around the air outlet, The heater rib hole has a plurality, and the plurality of heater rib holes are uniformly distributed corresponding to the plurality of heater ribs.

14. The rice cooker according to claim 5, wherein The air guide box cover plate is integrally formed with the protection frame, or The air guide box, the air guide box cover plate, the sensor, and the fan are assembled into an integral whole, and the integral whole is fixed to the protection frame.

15. The rice cooker according to claim 1, wherein The air outlet is annular.

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