Steam generator and cooking utensil
By using a combination of heating elements with different heating powers and temperature sensors in the steam generator, the problem of water level detection elements being susceptible to water quality and scale is solved, achieving stable and reliable water level detection and structural simplification.
Patent Information
- Application Number
- CN202422714885.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The water level detection elements of existing steam generators are easily affected by water quality and scale impurities, leading to failure, and their complex structure makes them difficult to integrate.
The design incorporates two heating elements with different heating powers and a temperature sensor, which detects water level by temperature changes, eliminating the need for a water level detection sensor and simplifying the structure.
It achieves stable and reliable water level detection, simplifies the structure, avoids sensor failure, and improves the reliability and service life of the steam generator.
Smart Images
Figure CN223512076U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to a steam generator and cooking appliance. Background Technology
[0002] Currently, most steam generators in steam ovens and steam-roasting ovens on the market use float-type reed switches, probes, or capacitors to detect the water level in the water tank. However, these detection components are easily affected by water quality or scale impurities in different regions, which can lead to failure. In addition, most of these components cannot be integrated into the structure of the steam generator.
[0003] Therefore, there is an urgent need for a steam generator and cooking appliance to solve the above problems. Utility Model Content
[0004] One objective of this invention is to provide a steam generator that not only enables stable and reliable water level detection, but also eliminates the need for a water level detection sensor, thus simplifying the overall structure.
[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:
[0006] A steam generator is provided for inputting steam into the cooking chamber of a cooking appliance, comprising:
[0007] A water box has a receiving cavity, the receiving cavity including a first receiving cavity and a second receiving cavity that are connected, the first receiving cavity being located above a portion of the second receiving cavity in the vertical direction, and a steam outlet being provided on the cavity wall of the receiving cavity;
[0008] A heating assembly is disposed on the water box. The heating assembly includes a first heating element and a second heating element. The first heating element is disposed corresponding to the first accommodating cavity and is at least partially located below the steam outlet. The second heating element is disposed corresponding to a portion of the second accommodating cavity and is located below the first heating element. The heating power of the first heating element is less than the heating power of the second heating element.
[0009] A temperature sensor is disposed on the water box, and the temperature sensor is disposed corresponding to the first accommodating cavity and located below the steam outlet.
[0010] Optionally, the second accommodating cavity includes a steam generating cavity and a steam discharging cavity, both of which are located above the steam generating cavity, and the steam outlet is disposed on the cavity wall of the steam discharging cavity.
[0011] Optionally, the steam generator further includes a first baffle, which is disposed inside the water box and surrounds the inner wall of the water box to form the first receiving cavity. A first notch is provided on the side wall of the first receiving cavity, which is used to connect the first receiving cavity and the steam generating cavity.
[0012] Optionally, a second notch is provided on the side wall of the first accommodating cavity, the second notch being used to connect the first accommodating cavity and the steam exhaust cavity.
[0013] Optionally, the steam generator further includes a first baffle, the first baffle including a first part and a second part arranged at an angle, the first part being used to separate the first receiving cavity and the steam discharge cavity, the second part being used to separate the first receiving cavity and the steam generating cavity, and the end of the second part not connected to the first part being inclined toward the steam generating cavity.
[0014] Optionally, the steam generator further includes a second baffle, which is disposed in the steam discharge chamber, and the steam outlet is located on the side of the second baffle away from the steam generation chamber.
[0015] Optionally, the first heating element includes a first heating element and a first heat-conducting plate, the first heat-conducting plate being disposed on the water tank, and the first heating element being disposed on the side of the first heat-conducting plate opposite to the water tank; and / or,
[0016] The second heating element includes a second heating element and a second heat-conducting plate. The second heat-conducting plate is disposed on the water box, and the second heating element is disposed on the side of the second heat-conducting plate away from the water box. The first heat-conducting plate and the second heat-conducting plate are spaced apart.
[0017] Optionally, the second heating element includes a second heating element and a thermostat, wherein the second heating element is electrically connected to the electrical control assembly of the cooking appliance via the thermostat.
[0018] Optionally, the water box includes a first box body and a second box body, wherein the first box body covers the opening of the second box body to form the receiving cavity;
[0019] The bottom of the second box has a first bottom wall and a second bottom wall. The first bottom wall protrudes towards the side opposite to the first box. The steam exhaust chamber is located on the first bottom wall. The heating component is located outside the water box and is correspondingly disposed on the second bottom wall.
[0020] Another objective of this invention is to provide a cooking appliance that not only enables stable and reliable water level detection, but also eliminates the need for a water level detection sensor, thus simplifying the overall structure.
[0021] Based on the above concept, the technical solution adopted by this utility model is as follows:
[0022] A cooking appliance is provided, comprising a cooking body, a water tank, and the aforementioned steam generator. The cooking body has a cooking cavity, and the water tank and the steam generator are both disposed on the cooking body and located outside the cooking cavity. The water tank has a water inlet and a steam outlet, the water inlet being connected to the water tank and the steam outlet being connected to the cooking cavity.
[0023] The beneficial effects of this utility model are as follows:
[0024] The steam generator proposed in this utility model includes a water tank, a heating assembly, and a temperature sensor. The water tank has a receiving cavity, which includes a first receiving cavity and a second receiving cavity that communicate with each other. The first receiving cavity is located vertically above a portion of the second receiving cavity, and a steam outlet is provided on the cavity wall of the receiving cavity. The heating assembly is disposed on the water tank and includes a first heating element and a second heating element. The first heating element is disposed corresponding to the first receiving cavity and is at least partially located below the steam outlet, allowing the fluid in the first receiving cavity to be heated by the first heating element. The second heating element is disposed corresponding to a portion of the second receiving cavity and is located below the first heating element, allowing the fluid in the second receiving cavity to be heated by the second heating element. The temperature sensor is disposed on the water tank, corresponding to the first receiving cavity and located below the steam outlet. The steam generator starts working. After the first heating element heats up for a period of time, its temperature stabilizes at T1. When the water in the water tank reaches the high water level and the first heating element is below the water level, its temperature will drop to T2. T1 - T2 = ΔT > 0. Therefore, if the temperature sensor detects a temperature difference of ΔT, it determines that the water in the water tank has reached the high water level. As the water in the water tank is consumed, when the water in the water tank reaches the low water level, i.e., when the first heating element is above the water level, its temperature will rise again to T1. If the temperature sensor detects a temperature difference of ΔT again, it can determine that the water in the water tank has reached the low water level. This steam generator does not require a water level detection sensor; instead, it uses two heating elements at different heights and a temperature sensor at a predetermined position to detect the water level in the water tank. It is stable, reliable, and has a simple structure. In addition, since the heating power of the first heating element is less than that of the second heating element, the second heating element has a larger power to boil water and generate steam to ensure the amount of steam generated, while the first heating element has a smaller power to ensure that dry burning will not affect the normal use of the steam generator.
[0025] The cooking appliance proposed in this utility model includes a cooking body, a water tank, and the aforementioned steam generator. The cooking body has a cooking cavity, and both the water tank and the steam generator are mounted on the cooking body and located outside the cooking cavity. The water tank has a water inlet and a steam outlet; the water inlet communicates with the water tank, and the steam outlet communicates with the cooking cavity. The steam generator of this cooking appliance does not require a water level detection sensor. Instead, it utilizes two heating elements at different heights and a temperature sensor at a predetermined position to detect the water level in the water tank, resulting in a stable, reliable, and simple structure. Attached Figure Description
[0026] Figure 1 This is an exploded view of the structure of the steam generator provided in this embodiment of the utility model. Figure 1 ;
[0027] Figure 2 This is an exploded view of the structure of the steam generator provided in this embodiment of the utility model. Figure 2 ;
[0028] Figure 3 This is a schematic diagram showing the positions of the water box, the first heating element, the second heating element, and the temperature sensor provided in this embodiment of the utility model.
[0029] Figure 4 This is a partial structural schematic diagram of the cooking utensil provided in an embodiment of the present utility model;
[0030] Figure 5 This is a partial structural exploded view of the cooking utensil provided in this embodiment of the utility model.
[0031] In the picture:
[0032] 1. Water box; 11. First box body; 12. Second box body; 121. Steam outlet; 122. Water inlet;
[0033] 101. First receiving cavity; 102. Steam discharge cavity; 103. Steam generation cavity; 104. First notch; 105. Second notch;
[0034] 2. First heating element; 21. First heating element; 22. First heat-conducting plate;
[0035] 3. Second heating element; 31. Second heating element; 32. Second heat-conducting plate; 33. Temperature controller;
[0036] 4. Temperature sensor; 5. First baffle; 51. First part; 52. Second part; 6. Second baffle;
[0037] 100. Steam generator; 200. Water tank; 300. Water circuit components; 3001. Water pump; 3002. Drain pump; 3003. Pumping pipe; 3004. Drain pipe; 400. Steam inlet pipe; 500. Electrical control components. Detailed Implementation
[0038] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0042] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0043] like Figures 1 to 3As shown, this embodiment provides a steam generator 100, including a water tank 1, a heating assembly, and a temperature sensor 4. The water tank 1 has a receiving cavity, which includes a first receiving cavity 101 and a second receiving cavity that are connected. The first receiving cavity 101 is located vertically above a portion of the second receiving cavity, and a steam outlet 121 is provided on the cavity wall of the receiving cavity. The heating assembly is disposed on the water tank 1 and includes a first heating element 2 and a second heating element 3. The first heating element 2 is disposed corresponding to the first receiving cavity 101 and is at least partially located below the steam outlet 121. The fluid in the first receiving cavity 101 can be heated by the first heating element 2. The second heating element 3 is disposed corresponding to a portion of the second receiving cavity and is located below the first heating element 2. The fluid in the second receiving cavity can be heated by the second heating element 3. The temperature sensor 4 is disposed on the water tank 1, and is disposed corresponding to the first receiving cavity 101 and located below the steam outlet 121. The temperature detected by the temperature sensor 4 is greatly affected by the temperature of the fluid in the first receiving cavity 101 and the temperature of the first heating element 2. In practice, the steam generator 100 starts working, and the first heating element 2 heats up. After the first heating element 2 heats up for a period of time, its temperature stabilizes at T1. When the water in the water tank 1 reaches the high water level and the first heating element 2 is below the water level, its temperature will decrease to T2, where T1-T2 = ΔT > 0. Therefore, if the temperature sensor 4 senses a temperature change difference ΔT, it can be determined that the water in the water tank 1 has reached the high water level. As the water in the water tank 1 is consumed, when the water in the water tank 1 reaches the low water level and the first heating element 2 is above the water level, its temperature will rise again to T1. If the temperature sensor 4 senses a temperature change difference ΔT again, it can be determined that the water in the water tank 1 has reached the low water level. The steam generator 100 provided in this embodiment does not require a water level detection sensor. Instead, it uses two heating elements at different heights and a temperature sensor 4 at a predetermined position to detect the water level in the water tank 1, which is stable, reliable, and has a simple structure.
[0044] The steam generator 100 provided in this embodiment also has a scale detection function. When there is no scale on the heating element and the cavity wall of the receiving chamber, the first heating element 2 heats up stably and the water in the water box 1 is at a high water level, and the temperature detected by the temperature sensor 4 is T2. After the steam generator 100 has been used for a period of time, if scale is attached to the heating element and the cavity wall of the receiving chamber, and the scale has a certain heat-insulating effect, when the first heating element 2 heats up stably and the water in the water box 1 is at a high water level, the temperature detected by the temperature sensor 4 is T21, T21≠T2. At this time, it is necessary to descale the water box 1. After descaling, the temperature detected by the temperature sensor 4 becomes T2 again, and it can be determined that the descaling is completed.
[0045] Furthermore, since the heating power of the first heating element 2 is less than that of the second heating element 3, in specific implementation, the temperature sensor 4 is electrically connected to the electronic control component 500 of the cooking appliance. When the temperature of the first heating element 2 drops to T2 and the temperature sensor 4 senses a temperature change difference ΔT, it sends a first preset signal to the electronic control component 500 to control the water in the water tank 200 of the cooking appliance to enter the water box 1. Therefore, the first heating element 2 may experience dry burning. The power of the first heating element 2 is relatively small, so that even if the first heating element 2 is dry burning for a long time without water, it will not affect the normal use of the steam generator 100. However, the second heating element 3 will not experience dry burning when there is water in the water tank 200. Therefore, the power of the second heating element 3 can be set to be larger so that the second heating element 3 is used to boil water and generate steam, ensuring the amount of steam generated.
[0046] Optionally, such as Figure 3 As shown, the second accommodating cavity includes a steam generating cavity 103 and a steam discharging cavity 102. Both the steam discharging cavity 102 and the first accommodating cavity 101 are located above the steam generating cavity 103. A steam outlet 121 is located on the wall of the steam discharging cavity 102, meaning that water in the water box 1 is heated in the steam generating cavity 103 to generate steam, and then discharged through the steam outlet 121. The first heating element 2 and the temperature sensor 4 are positioned corresponding to the first accommodating cavity 101. Since the steam discharging cavity 102 is also located above the steam generating cavity 103, if the water level in the water box 1 drops to a low level, the water in the steam generating cavity 103 is heated to generate steam. When the steam is discharged through the steam outlet 121, it does not need to pass entirely through the first accommodating cavity 101. This reduces the amount of steam flowing through the temperature sensor 4, thereby reducing the impact of steam on the accuracy of the temperature detected by the temperature sensor 4 when the first heating element 2 is dry-burning.
[0047] Optionally, the steam generator 100 further includes a first baffle 5, which is disposed inside the water box 1. The first baffle 5 and the inner wall of the water box 1 enclose a first receiving cavity 101. The first baffle 5 substantially isolates the first receiving cavity 101 from the steam discharge cavity 102 and the steam generating cavity 103. The purpose of this isolation is to further reduce the amount of steam flowing into the first receiving cavity 101 when the water in the steam generating cavity 103 is heated to generate steam, thereby reducing the impact on the accuracy of the temperature detected by the temperature sensor 4 when the first heating element 2 is dry-burning. A first notch 104 is also provided on the side wall of the first receiving cavity 101. The first notch 104 is used to connect the first receiving cavity 101 and the steam generating cavity 103, that is, when the water level rises, water can overflow into the first receiving cavity 101 through the first notch 104.
[0048] Optionally, a second notch 105 is also provided on the side wall of the first accommodating cavity 101. The second notch 105 is used to connect the first accommodating cavity 101 and the steam discharge cavity 102. That is, when the water in the first accommodating cavity 101 is heated to generate steam, the steam can flow through the second notch 105 to the steam discharge cavity 102 and then be discharged.
[0049] In specific implementation, the first notch 104 and the second notch 105 can be provided on the first baffle 5, or the first baffle 5 can be spaced apart from the side wall of the water box 1 to form the first notch 104 and the second notch 105. Alternatively, one of the first notch 104 and the second notch 105 can be provided on the first baffle 5, and the other can be formed through the gap between the first baffle 5 and the side wall of the water box 1.
[0050] In this embodiment, the first baffle 5 includes a first part 51 and a second part 52 arranged at an angle. The first part 51 is used to separate the first receiving cavity 101 and the steam discharge cavity 102, and the second part 52 is used to separate the first receiving cavity 101 and the steam generating cavity 103. The end of the second part 52 facing away from the first part 51 is inclined towards the steam generating cavity 103. When the water level in the receiving cavity drops, the inclined second part 52 can prevent water in the first receiving cavity 101 from accumulating at the connection between the first part 51 and the second part 52.
[0051] Optionally, the steam generator 100 further includes a second baffle 6, which is disposed within the steam discharge chamber 102, with the steam outlet 121 located on the side of the second baffle 6 facing away from the steam generation chamber 103. By using the second baffle 6 to separate the steam outlet 121 from the steam generation chamber 103, water in the steam generation chamber 103 can be prevented from splashing to the steam outlet 121 during the boiling process, while steam can flow to the steam outlet 121 through the gap between the second baffle 6 and the side wall of the water box 1, thereby enhancing the water-steam separation effect of the steam generator 100.
[0052] In this embodiment, the second baffle 6 is inclined, and the steam separation space formed between the second baffle 6 and the side wall of the water box 1 with the steam outlet 121 gradually increases along the steam flow direction. By setting a smaller steam inlet and a larger separation space at the steam outlet 121, the water-steam separation effect can be improved. In this embodiment, the steam outlet 121 is located at the top of the water box 1, which requires the steam to turn upwards after entering the steam separation space and exit through the steam outlet 121, further reducing the speed at which the steam leaves the steam outlet 121 and preventing water from being carried away by the steam. In addition, both ends of the second baffle 6 in the extension direction are spaced apart from the side wall of the water box 1. The first end of the second baffle 6 located upstream in the steam flow direction forms the entrance to the steam separation space with the first side wall of the water box 1, and the gap between the second end of the second baffle 6 located downstream in the steam flow direction and the second side wall of the water box 1 is used to allow the water carried by the steam to be separated and discharged from there.
[0053] Optionally, the first heating element 2 includes a first heating element 21 and a first heat-conducting plate 22. The first heat-conducting plate 22 is disposed on the water tank 1, and the first heating element 21 is disposed on the side of the first heat-conducting plate 22 away from the water tank 1. The first heat-conducting plate 22 may be an aluminum plate. The first heat-conducting plate 22 is used to transfer the temperature of the first heating element 21 so that the heat is more evenly directed to the water in the water tank 1.
[0054] Optionally, the second heating element 3 includes a second heating element 31 and a second heat-conducting plate 32. The second heat-conducting plate 32 is disposed on the water tank 1, and the second heating element 31 is disposed on the side of the second heat-conducting plate 32 away from the water tank 1. The second heat-conducting plate 32 may be an aluminum plate. The second heat-conducting plate 32 is used to transfer the temperature of the first heating element 21 so that the heat is directed more evenly to the water in the water tank 1.
[0055] Optionally, the second heating element 3 further includes a thermostat 33. The second heating element 31 is electrically connected to the electrical control component 500 of the cooking appliance via the thermostat 33. The thermostat 33 is used to disconnect the circuit between the second heating element 31 and the electrical control component 500 when the temperature of the second heating element 31 rises to a warning temperature. The second heating element 31 is an electric heating element. When it is necessary to heat the water in the water tank 1, the electrical control component 500 controls the second heating element 31 to be energized for heating. When the second heating element 31 is dry-burning and its own temperature rises to the warning temperature, the thermostat 33 will disconnect the circuit between the second heating element 31 and the electrical control component 500 to ensure the safety of the steam generator 100.
[0056] Optionally, the heating element can be installed inside or outside the water tank 1, both of which can heat the water inside the water tank 1. The temperature sensor 4 can be installed inside or outside the water tank 1; if the temperature sensor 4 is installed outside the water tank 1, it can detect the temperature of the water tank 1.
[0057] In practice, the heating component heats the water in water tank 1 through heat conduction. If temperature sensor 4 is located inside water tank 1, the water level rises above temperature sensor 4. Because the inlet water temperature is much lower than the heated water temperature, the overall temperature of the water in water tank 1 decreases, causing the temperature detected by temperature sensor 4 to drop. If temperature sensor 4 is located outside water tank 1, the water level rises above temperature sensor 4. Because the inlet water temperature is much lower than the heated water temperature, the overall temperature of the water in water tank 1 decreases, causing the temperature of the tank to drop, and thus the temperature detected by temperature sensor 4 to drop.
[0058] In practical implementation, if the heating component is located inside the water tank 1, scale may adhere to both the heating component and the cavity wall. If the temperature sensor 4 is located inside the water tank 1, the heating effect of the first heating element 2 will decrease, and the temperature detected by the temperature sensor 4 will also decrease. If the temperature sensor 4 is located outside the water tank 1, the temperature detected by the temperature sensor 4 will also decrease due to the reduced heating effect of the first heating element 2 and the heat-insulating effect of the scale on the water tank 1, i.e., T21 < T2 detected by the temperature sensor 4. If the heating component is located outside the water tank 1, scale may only adhere to the cavity wall. If the temperature sensor 4 is located inside the water tank 1, the temperature detected by the temperature sensor 4 will decrease due to the heat-insulating effect of the scale on the water tank 1, i.e., T21 < T2 detected by the temperature sensor 4. If the temperature sensor 4 is located outside the water tank 1, the temperature of the tank detected by the first heating element 2 will increase due to the heat-insulating effect of the scale on the water tank 1, i.e., T21 > T2 detected by the temperature sensor 4. That is, the heating element and the temperature sensor 4 are in different positions. When there is scale, the temperature detected by the temperature sensor 4 will change. This change can be identified as a signal that the steam generator 100 needs to be descaled.
[0059] Optionally, the water box 1 includes a first box body 11 and a second box body 12. The first box body 11 covers the opening of the second box body 12 to form a receiving cavity. The receiving cavity includes an upper receiving cavity and a lower receiving cavity, with the upper receiving cavity located above the lower receiving cavity. The first part 51 of the first baffle 5 is disposed within the upper receiving cavity and is angled to the horizontal direction, dividing the upper receiving cavity into a first receiving cavity 101 and a steam discharge cavity 102. The steam discharge cavity 102 and the steam generating cavity 103 are not substantially separated, but are distinguished only by their spatial position. The portion of the second receiving cavity that is horizontally adjacent to the first receiving cavity 101 is the steam discharge cavity 102, and the portion of the second receiving cavity that is vertically below the first receiving cavity 101 is the steam generating cavity 103.
[0060] Optionally, the bottom of the second housing 12 has a first bottom wall and a second bottom wall. The first bottom wall is the portion of the bottom that protrudes towards the side opposite to the first housing 11, and the steam exhaust chamber 102 is located at the first bottom wall. The second bottom wall is the portion of the bottom that does not protrude towards the side opposite to the first housing 11, meaning the first and second bottom walls are not on the same plane. In this embodiment, the heating component is located outside the water tank 1 and is correspondingly disposed at the second bottom wall. This both increases the volume of the steam exhaust chamber 102 and ensures sufficient installation space for the heating component.
[0061] like Figure 4 and Figure 5 As shown, this embodiment also provides a cooking appliance, including a cooking body, a water tank 200, and the aforementioned steam generator 100. The cooking body has a cooking cavity. The water tank 200 and the steam generator 100 are both disposed on the cooking body and located outside the cooking cavity. The water tank 1 has a water inlet 122 and a steam outlet 121. The water inlet 122 communicates with the water tank 200, and the steam outlet 121 communicates with the cooking cavity. The steam generator 100 of this cooking appliance does not require a water level detection sensor. Instead, it utilizes two heating elements at different heights and a temperature sensor 4 at a predetermined position to detect the water level in the water tank 1, which is stable, reliable, and has a simple structure.
[0062] Optionally, the steam outlet 121 is located on the first side wall of the water box 1 and at the top of the water box 1, while the water inlet 122 is provided at the bottom of the water box 1, and the water tank 200 of the cooking appliance can supply water to the water box 1 through the water inlet 122.
[0063] Optionally, the cooking appliance also includes an electronic control component 500, a water circuit component 300, and a steam inlet pipe 400. The electronic control component 500 is electrically connected to the heating component and the temperature sensor 4. The water inlet 122 is connected to the water tank 200 through the water circuit component 300, and the steam outlet 121 is connected to the steam inlet of the cooking cavity through the steam inlet pipe 400. The water circuit component 300 includes a water suction pipe 3003 and a water pump 3001 installed on the water suction pipe 3003, a drain pipe 3004 and a drain pump 3002 installed on the drain pipe 3004. Both the water suction pipe 3003 and the drain pipe 3004 are connected to the water tank 200 at one end and to the water inlet 122 at the other end. After the user starts the program, the electronic control component 500 controls the first heating element 2 to start heating. At the same time, the water pump 3001 draws water from the water tank 200 and enters the water box 1 of the steam generator 100 through the water pipe 3003. When the temperature sensor 4 senses a temperature change difference ΔT, it determines that the water level in the water box 1 has reached the high level. The temperature sensor 4 sends a second preset signal to the electronic control component 500. At this time, the electronic control component 500 stops adding water to the water box 1 and the second heating element 3 starts heating. The steam generated by the water heating can be input into the cooking cavity through the steam inlet pipe 400 connected to the steam outlet 121. As the water in the water box 1 is continuously consumed, the first heating element 2 begins to dry-burn, and the temperature rises. When the temperature sensor 4 senses a temperature change difference ΔT again, the temperature sensor 4 sends a first preset signal to the electronic control component 500. The electronic control component 500 once again controls the water pump 3001 to draw water from the water tank 200 into the water box 1, completing the next cycle of water addition. After the program ends, the drain pump 3002 starts to extract the remaining water in the water box 1 and return it to the water tank 200 through the drain pipe 3004.
[0064] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A steam generator for inputting steam into the cooking chamber of a cooking appliance, characterized in that, include: Water box (1) has a receiving cavity, the receiving cavity including a first receiving cavity (101) and a second receiving cavity that are connected, the first receiving cavity being located above a portion of the second receiving cavity in the vertical direction, and a steam outlet (121) is provided on the cavity wall of the receiving cavity; A heating assembly is disposed on the water box (1). The heating assembly includes a first heating element (2) and a second heating element (3). The first heating element (2) is disposed corresponding to the first accommodating cavity (101) and is at least partially located below the steam outlet (121). The second heating element (3) is disposed corresponding to a portion of the second accommodating cavity and is located below the first heating element (2). The heating power of the first heating element (2) is less than the heating power of the second heating element (3). A temperature sensor (4) is disposed on the water box (1). The temperature sensor (4) is disposed corresponding to the first accommodating cavity (101) and located below the steam outlet (121).
2. The steam generator according to claim 1, characterized in that, The second accommodating cavity includes a steam generating cavity (103) and a steam discharging cavity (102). The steam discharging cavity (102) and the first accommodating cavity (101) are both located above the steam generating cavity (103), and the steam outlet (121) is disposed on the cavity wall of the steam discharging cavity (102).
3. The steam generator according to claim 2, characterized in that, The steam generator (100) further includes a first baffle (5), which is disposed inside the water box (1) and surrounds the inner wall of the water box (1) to form a first accommodating cavity (101). A first notch (104) is provided on the side wall of the first accommodating cavity (101), and the first notch (104) is used to connect the first accommodating cavity (101) and the steam generating cavity (103).
4. The steam generator according to claim 2, characterized in that, A second notch (105) is provided on the side wall of the first accommodating cavity (101), and the second notch (105) is used to connect the first accommodating cavity (101) and the steam discharge cavity (102).
5. The steam generator according to claim 2, characterized in that, The steam generator (100) further includes a first baffle (5), which includes a first part (51) and a second part (52) arranged at an angle. The first part (51) is used to separate the first accommodating cavity (101) and the steam discharge cavity (102), and the second part (52) is used to separate the first accommodating cavity (101) and the steam generating cavity (103). The end of the second part (52) that is not connected to the first part (51) is inclined toward the side of the steam generating cavity (103).
6. The steam generator according to claim 2, characterized in that, The steam generator (100) further includes a second baffle (6), which is disposed in the steam discharge chamber (102), and the steam outlet (121) is located on the side of the second baffle (6) away from the steam generation chamber (103).
7. The steam generator according to claim 1, characterized in that, The first heating element (2) includes a first heating element (21) and a first heat-conducting plate (22), the first heat-conducting plate (22) being disposed on the water tank (1), and the first heating element (21) being disposed on the side of the first heat-conducting plate (22) facing away from the water tank (1); and / or, The second heating element (3) includes a second heating element (31) and a second heat-conducting plate (32). The second heat-conducting plate (32) is disposed on the water box (1). The second heating element (31) is disposed on the side of the second heat-conducting plate (32) away from the water box (1). The first heat-conducting plate (22) and the second heat-conducting plate (32) are spaced apart.
8. The steam generator according to claim 1, characterized in that, The second heating element (3) includes a second heating element (31) and a thermostat (33), wherein the second heating element (31) is electrically connected to the electrical control assembly (500) of the cooking appliance via the thermostat (33).
9. The steam generator according to claim 2, characterized in that, The water box (1) includes a first box body (11) and a second box body (12), wherein the first box body (11) covers the opening of the second box body (12) to form the accommodating cavity; The bottom of the second box (12) has a first bottom wall and a second bottom wall. The first bottom wall protrudes toward the side away from the first box (11). The steam exhaust chamber (102) is located at the first bottom wall. The heating component is located outside the water box (1) and is located at the second bottom wall.
10. A cooking utensil, characterized in that, The device includes a cooking body, a water tank (200), and a steam generator (100) as described in any one of claims 1 to 9. The cooking body has a cooking cavity, and the water tank (200) and the steam generator (100) are both disposed on the cooking body and located outside the cooking cavity. The water tank (1) has a water inlet (122) and a steam outlet (121). The water inlet (122) is connected to the water tank (200), and the steam outlet (121) is connected to the cooking cavity.