Steam generator and cooking equipment

Abstract

The utility model discloses a steam generator and cooking equipment. The steam generator comprises a first-stage heating structure, a first box body and a first heating piece connected with the first box body, the first box body is provided with a water inlet part and a first steam outlet hole, a first heating cavity is formed in the first box body, and water outside the steam generator flows into the first heating cavity through the water inlet part; the first heating piece is used for heating water in the first heating cavity to form water vapor; the second-stage heating structure comprises a second box body and a second heating piece, a second steam outlet hole and a steam inlet hole connected with the first steam outlet hole are formed in the second box body, a second heating cavity is formed in the second box body, the second heating piece is installed on the second box body, and a heating part of the second heating piece is located in the second heating cavity; the second heating piece is used for heating water vapor in the second heating cavity. The steam generator provided by the utility model can provide high-temperature steam, so that the cooking efficiency and the cooking effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, and in particular to a steam generator and cooking equipment. Background Art

[0002] Steaming, a traditional Chinese cooking method, has long been highly regarded. With the widespread adoption of smart home appliances, steaming appliances like steamers and oven-steamers are rapidly becoming commonplace. While steaming is widely accepted as a healthy cooking method, consumers are increasingly demanding higher performance from their appliances and are increasingly interested in healthy eating. Traditional steamers no longer meet these demands, leading to a surge in demand for appliances with faster heating times, shorter preheating times, and higher cooking temperatures.

[0003] Therefore, there is an urgent need for a steam generator and a cooking device to solve the above technical problems. Utility Model Content

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a steam generator, which provides a primary heating structure and a secondary heating structure that are interconnected, and performs secondary heating on the water vapor in the second heating chamber through a second heating element, so that the water vapor in the second heating chamber forms high-temperature saturated water vapor. The temperature of the high-temperature saturated water vapor after secondary heating is much higher than that of ordinary water vapor. The high-temperature saturated water vapor in the second heating chamber flows into the working chamber of the appliance through the second steam outlet, which can effectively shorten the working time of the appliance and meet the user's demand for higher temperature cooking.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A steam generator comprising:

[0007] The primary heating structure includes a first housing and a first heating element connected to the first housing, wherein the first housing is provided with a water inlet and a first steam outlet, forming a first heating chamber within the first housing, and water outside the steam generator flows into the first heating chamber through the water inlet. The first heating element is used to heat the water in the first heating chamber to form steam;

[0008] The secondary heating structure includes a second box body and a second heating element. The second box body is provided with a second steam outlet and a steam inlet connected to the first steam outlet. A second heating chamber is formed in the second box body. The second heating element is installed on the second box body, and the heating part of the second heating element is located in the second heating chamber. The second heating element is used to heat the water vapor in the second heating chamber.

[0009] Optionally, the heating portion of the second heating element is a heating coil, a plurality of spaced partitions are provided in the second box body, a steam passage is formed between the plurality of partitions and the second box body, and the heating coil is extended along the steam passage.

[0010] Optionally, among the two adjacent partitions, the first end of one of the partitions is connected to the first inner wall of the second box body, and the second end is spaced apart from the second inner wall of the second box body; the first end of the other partition is connected to the second inner wall of the second box body, and the second end is spaced apart from the first inner wall of the second box body, and the first inner wall of the second box body is arranged opposite to the second inner wall of the second box body.

[0011] Optionally, the second box body is located on the upper side of the first box body, the steam inlet is arranged on the lower side of the second box body and located at the first end of the second box body, the second steam outlet is arranged on the upper side of the second box body and located at the second end of the second box body, and the first end of the second box body and the second end of the second box body are the two ends of the heating coil that are the longest apart.

[0012] Optionally, the steam generator is mounted on the electrical appliance, and the steam generator further comprises a first temperature detector provided on the first box body, the first temperature detector being used to detect the temperature T1 in the first heating chamber; and / or

[0013] It also includes a first snap-action thermostat arranged on the first box body, which is used to detect the temperature T1 in the first heating chamber and control the on and off of the circuit of the electrical appliance according to T1.

[0014] Optionally, the steam generator is mounted on the electrical appliance, and the steam generator further comprises a second temperature detector provided on the second box body, the second temperature detector being used to detect the temperature T2 in the second heating chamber; and / or

[0015] It also includes a second sudden jump thermostat arranged on the second box body, and the second sudden jump thermostat is used to detect the temperature T2 in the second heating chamber and control the on and off of the circuit of the electrical appliance according to T2.

[0016] Optionally, high-temperature thermal grease is provided between the first temperature detector and the first box body, between the first snap-action thermostat and the first box body, between the second temperature detector and the second box body, and between the second snap-action thermostat and the second box body.

[0017] Another aspect of the present invention provides a cooking device, comprising a cooking cavity and the above-mentioned steam generator, wherein the steam generator is arranged outside the cooking cavity, and the second steam outlet is connected to the cooking cavity.

[0018] Optionally, it also includes a water tank, a water pump, a flow meter and a water pipe arranged outside the cooking cavity, one end of the water pipe is connected to the water outlet end of the water tank or the water supply pipe outside the cooking equipment, and the other end of the water pipe is connected to the water inlet, and the water pump and the flow meter are both installed on the water pipe.

[0019] Optionally, a third temperature detector is further provided on the cooking cavity, wherein the third temperature detector is used to detect the temperature T3 in the cooking cavity; and / or

[0020] The cooking device further comprises a third kick-type thermostat arranged on the cooking cavity, wherein the third kick-type thermostat is used to detect the temperature T3 in the cooking cavity and control the on-off of the circuit of the cooking device according to T3.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The steam generator provided by the utility model is provided with a primary heating structure and a secondary heating structure which are interconnected. The water vapor in the second heating chamber is secondary heated by the second heating element so that the water vapor in the second heating chamber forms high-temperature saturated water vapor. The temperature of the high-temperature saturated water vapor after secondary heating is much higher than that of ordinary water vapor. The high-temperature saturated water vapor in the second heating chamber flows into the working chamber of the appliance through the second steam outlet, which can effectively shorten the working time of the appliance and meet the user's demand for higher temperature cooking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a cooking device provided by a specific embodiment of the utility model;

[0024] Figure 2 This is an exploded view of a steam generator provided by a specific embodiment of the present utility model;

[0025] Figure 3 This is a top view of a steam generator provided by a specific embodiment of the present utility model;

[0026] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0027] Figure 5 This is a schematic diagram of the assembly of the partition and the second heating element of the steam generator provided by a specific embodiment of the present invention within the second box body;

[0028] Figure 6It is a schematic diagram of the operating steps of the cooking device provided by a specific embodiment of the present utility model.

[0029] In the picture:

[0030] 1. Cooking chamber; 11. Third temperature detector; 12. Third snap-action thermostat;

[0031] 2. Steam generator; 21. Primary heating structure; 210. First box body; 2111. First box body; 2112. First cover; 2113. First steam outlet; 2114. Water inlet; 212. First heating element; 213. First temperature detector; 214. First snap-action thermostat; 215. Connecting pipe; 22. Secondary heating structure; 220. Second box body; 2210. Steam passage; 2211. Second box body; 2212. Second cover; 2213. Second steam outlet; 2214. Steam inlet; 2215. Partition; 222. Second heating element; 223. Second temperature detector; 224. Second snap-action thermostat; 225. Steam connector; 100. First heating chamber; 200. Second heating chamber;

[0032] 3. Water tank;

[0033] 4. Water pump;

[0034] 5. Flow meter;

[0035] 6. Water pipes;

[0036] 7. Steam delivery pipe. DETAILED DESCRIPTION

[0037] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0038] Please refer to Figure 1-Figure 5The present invention provides a steam generator including a primary heating structure 21 and a secondary heating structure 22. The primary heating structure 21 includes a first housing 210 and a first heating element 212 connected to the first housing 210. The first housing 210 is provided with a water inlet 2114 and a first steam outlet 2113. A first heating chamber 100 is formed within the first housing 210. Water outside the steam generator 2 flows into the first heating chamber 100 through the water inlet 2114. The first heating element 212 is used to heat the water in the first heating chamber 100 to form steam. The secondary heating structure 22 includes a second box body 220 and a second heating element 222. The second box body 220 is provided with a second steam outlet 2213 and a steam inlet 2214 connected to the first steam outlet 2113. A second heating chamber 200 is formed in the second box body 220. The second heating element 222 is installed on the second box body 220, and the heating part of the second heating element 222 is located in the second heating chamber 200. The second heating element 222 is used to heat the water vapor in the second heating chamber 200. The water vapor in the second heating chamber 200 is secondary heated by the second heating element 222 so that the water vapor in the second heating chamber 200 forms high-temperature saturated water vapor. The temperature of the high-temperature saturated water vapor after secondary heating is much higher than that of ordinary water vapor. The high-temperature saturated water vapor in the second heating chamber 200 flows into the working chamber of the appliance through the second steam outlet 2213, which can effectively shorten the working time of the appliance and meet the user's demand for higher temperature cooking.

[0039] Optionally, the heating part of the second heating element 222 is a heating coil, and a plurality of spaced partitions 2215 are provided in the second box body 220, and a steam passage 2210 is formed between the plurality of partitions 2215 and the second box body 220. The heating coil extends along the steam passage 2210, and the water vapor flowing from the first heating chamber 100 into the second heating chamber 200 flows along the steam passage 2210 and is gradually heated by the heating coil provided in the steam passage 2210, thereby forming high-temperature saturated water vapor.

[0040] Optionally, of two adjacent partitions 2215, the first end of one partition 2215 is connected to the first inner wall of the second box body 220, and the second end is spaced apart from the second inner wall of the second box body 220. The first end of the other partition 2215 is connected to the second inner wall of the second box body 220, and the second end is spaced apart from the first inner wall of the second box body 220. The first inner wall of the second box body 220 is arranged opposite to the second inner wall of the second box body 220, thereby forming a steam passage 2210.

[0041] Optionally, the second box body 220 is located on the upper side of the first box body 210, the steam inlet 2214 is arranged on the lower side of the second box body 220 and located at the first end of the second box body, and the second steam outlet 2213 is arranged on the upper side of the second box body 220 and located at the second end of the second box body. The first end of the second box body and the second end of the second box body are the two ends of the heating coil with the longest distance between them, so that the water vapor can flow a longer distance in the second heating chamber 200, thereby heating the temperature of the water vapor to a preset temperature.

[0042] Optionally, the steam generator 2 is mounted on the appliance and further includes a first temperature detector 213 disposed on the first housing 210. The first temperature detector 213 is configured to detect the temperature T1 within the first heating chamber 100. When T1 ≥ T11, the first heating element 212 stops heating to prevent dry cooking within the first heating chamber 100. T11 is a first preset temperature. The steam generator 2 also includes a first snap-action thermostat 214 disposed on the first housing 210. The first snap-action thermostat 214 is configured to detect the temperature T1 within the first heating chamber 100 and control the on / off of the appliance circuit based on T1. Specifically, when T1 ≥ T12, indicating that the first temperature detector 213 has failed and dry cooking has occurred within the first heating chamber 100, the first snap-action thermostat 214 disconnects the cooking device circuit to prevent danger to the appliance. T12 is a sixth preset temperature, and T11 < T12.

[0043] Optionally, the steam generator 2 is installed on the electrical appliance, and the steam generator 2 also includes a second temperature detector 223 arranged on the second box body 220. The second temperature detector 223 is used to detect the temperature T2 in the second heating chamber 200. When T2≥T21, the second heating element 222 stops heating to avoid dry burning in the second heating chamber 200. When T2≤T22, the second heating element 222 restarts heating, wherein T21 is the second preset temperature and T22 is the third preset temperature. And / or also includes a second sudden jump thermostat 224 arranged on the second box body 220, the second sudden jump thermostat 224 is used to detect the temperature T2 in the second heating chamber 200, and control the circuit of the electrical appliance according to T2. Specifically, when T2≥T23, it means that the second temperature detector 223 fails and dry burning occurs in the second heating chamber 200. At this time, the second sudden jump thermostat 224 cuts off the circuit of the cooking device to avoid danger to the electrical appliance, wherein T23 is the seventh preset temperature and T21<T23.

[0044] Optionally, high-temperature thermal grease is provided between the first temperature detector 213 and the first box body 210, between the first jump type thermostat 214 and the first box body 210, between the second temperature detector 223 and the second box body 220, and between the second jump type thermostat 224 and the second box body 220, so that the temperature of the first box body 210 is conducted to the first temperature detector 213 and the first jump type thermostat 214, and the temperature of the second box body 220 is conducted to the second temperature detector 223 and the second jump type thermostat 224, thereby improving the detection accuracy of the first temperature detector 213, the first jump type thermostat 214, the second temperature detector 223 and the second jump type thermostat 224.

[0045] Optionally, the first box body 210 includes a first box body 2111 and a first cover 2112 , and the first box body 2111 and the first cover 2112 are covered to form the first heating chamber 100 .

[0046] Optionally, the second box body 220 includes a second box body 2211 and a second cover 2212 , and the second box body 2211 and the second cover 2212 are covered to form the second heating chamber 200 .

[0047] Furthermore, a first sealing ring is provided between the first box body 2111 and the first cover body 2112, and between the second box body 2211 and the second cover body 2212 to seal the gap between the first box body 2111 and the first cover body 2112, and between the second box body 2211 and the second cover body 2212 to prevent water vapor leakage.

[0048] Optionally, a connecting pipe 215 is further included, and the first steam outlet 2113 is connected to the steam inlet 2214 through the connecting pipe 215 .

[0049] Furthermore, a second sealing ring is provided between the connecting pipe 215 and the first steam outlet 2113 and between the connecting pipe 215 and the steam inlet 2214 to seal the gap between the connecting pipe 215 and the first steam outlet 2113 and between the connecting pipe 215 and the steam inlet 2214 to prevent water vapor leakage.

[0050] Optionally, a steam connector 225 is further included, and the steam connector 225 is arranged at the second steam outlet 2213 to facilitate the delivery of high-temperature saturated steam to the cooking cavity 1.

[0051] Optionally, a third sealing ring is provided at the portion of the second heating element 222 that passes through the second box body 220 to seal the gap at the connection between the second heating element 222 and the second box body 220 to prevent water vapor leakage.

[0052] Please refer to Figure 1On the other hand, the present invention provides a cooking device, including a cooking cavity 1 and the above-mentioned steam generator 2. The steam generator 2 is arranged on the outside of the cooking cavity 1, and the second steam outlet 2213 is connected to the cooking cavity 1 to provide high-temperature saturated steam to the cooking cavity 1 to accelerate the cooking efficiency of the cooking cavity 1.

[0053] Optionally, the cooking chamber 1 further includes a water tank 3, a water pump 4, a flow meter 5, and a water pipe 6. One end of the water pipe 6 is connected to the water outlet of the water tank 3 or a water supply pipe 6 outside the cooking apparatus, and the other end of the water pipe 6 is connected to the water inlet 2114. The water pump 4 and the flow meter 5 are both mounted on the water pipe 6. The water pump 4 is provided to deliver water to the first heating chamber 100, and the flow meter 5 is provided to control the flow of water into the first heating chamber 100 to prevent excessive water flow from overflowing from the steam generator 2 into the cooking chamber 1.

[0054] Optionally, the cooking chamber 1 further includes a third temperature detector 11, which is configured to detect the temperature T3 within the cooking chamber 1. When T3 ≥ T0, the water pump 4 and steam generator 2 both cease operation to prevent the temperature within the cooking chamber 1 from exceeding the user-preset cooking temperature T0. The cooking chamber 1 further includes a third snap-action thermostat 12, which is configured to detect the temperature T3 within the cooking chamber 1 and control the cooking device's circuitry based on T3. Specifically, when T3 ≥ T32, indicating that the third temperature detector 11 has failed and the temperature within the cooking chamber 1 is significantly higher than the preset cooking temperature T0, the third snap-action thermostat 12 disconnects the cooking device's circuitry to prevent any danger to the cooking device. T32 is a fifth preset temperature, and T0 < T32.

[0055] Optionally, a steam delivery pipe 7 is further included, one end of the steam delivery pipe 7 is connected to the steam joint 225 , and the other end is connected to the cooking cavity 1 .

[0056] Please refer to Figure 6 On the other hand, the present invention provides a method for operating the cooking device as described above, comprising the following steps:

[0057] S1: Start the cooking device, the user sets the preset heating time t0 of the cooking device and the cooking temperature T0 in the cooking cavity 1, and enters S2 and S6 at the same time;

[0058] S2: Start the water pump 4 to supply water into the first heating chamber 100;

[0059] S3: Determine whether the water supply M1 into the first heating chamber 100 reaches the maximum preset flow rate M1. If so, the water pump 4 stops running and enters S4. If not, repeat S3.

[0060] S4: Start the first heating element 212;

[0061] S5: Determine whether T1 ≥ T11. If so, return to S2. If not, repeat S5.

[0062] S6: Start the second heating element 222;

[0063] S7: Determine whether T2 ≥ T21. If so, the second heating element 222 stops heating and proceeds to S8. If not, repeat S7.

[0064] S8: Determine whether T2≤T22. If so, return to S6. If not, repeat S8.

[0065] During the operation of the steam generator 2, it is determined whether t1 ≥ t0. If so, the steam generator 2 and the water pump 4 stop running and the program ends. t1 is the operating time of the cooking device.

[0066] In this way, the water vapor can be further heated so that the temperature of the high-temperature saturated water vapor in the second heating chamber 200 can reach 130°C to accelerate the cooking efficiency. At the same time, the first heating element 212 and the second heating element 222 will not operate synchronously, which can avoid the problem of excessive power caused by the first heating element and the second heating element working at the same time.

[0067] Specifically, during the operation of the steam generator 2, it is determined whether t1 ≥ t0. If so, the steam generator 2 and the water pump 4 are stopped, and the program ends in steps S3, S5, S7, and S8.

[0068] Optionally, S1 further includes the following steps:

[0069] S11: Start the first heating element 212;

[0070] S12: Determine whether T1 ≥ T11. If so, the first heating element 212 stops heating and enters S2. If not, repeat S12.

[0071] Optionally, during the operation of the steam generator 2, the following steps are further included:

[0072] S100: Determine whether T3 ≥ T0. If so, both the water pump 4 and the steam generator 2 stop running. If not, proceed to S200.

[0073] S200: Determine whether T3≤T31. If so, return to S11. If not, repeat S200.

[0074] Wherein, T31 is a fourth preset temperature, T31<T0.

[0075] Through this step, the temperature range in the cooking cavity 1 is made to be close to the set cooking temperature T0.

[0076] Optionally, in S100 , if T3 ≥ T0 , it is further determined whether T3 ≥ T32 . If so , the third snap-action thermostat 12 cuts off the circuit of the cooking device . If not , this step is repeated .

[0077] Optionally, in S5, if T1≥T11, it is further determined whether T1≥T12. If so, the first snap-action thermostat 214 cuts off the circuit of the cooking device. If not, this step is repeated.

[0078] Optionally, in S7, if T2≥T21, it is further determined whether T2≥T23. If so, the second kick-type thermostat 224 cuts off the circuit of the cooking device.

[0079] Furthermore, in this embodiment, S0 is 60 min, T0 is 120°C, T11 is 105°C, T12 is 110°C, T21 is 110°C, T22 is 90°C, T23 is 125°C, T31 is 110°C, and T32 is 135°C.

[0080] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A steam generator, characterized in that: include: A primary heating structure (21), comprising a first box body (210) and a first heating element (212) connected to the first box body (210), the first box body (210) being provided with a water inlet (2114) and a first steam outlet (2113), a first heating chamber (100) being formed in the first box body (210), water outside the steam generator flowing into the first heating chamber (100) through the water inlet (2114), and the first heating element (212) being used for heating the water in the first heating chamber (100) to form water vapor; A secondary heating structure (22) comprises a second box body (220) and a second heating element (222); the second box body (220) is provided with a second steam outlet (2213) and a steam inlet (2214) connected to the first steam outlet (2113); a second heating chamber (200) is formed in the second box body (220); the second heating element (222) is installed on the second box body (220); and the heating part of the second heating element (222) is located in the second heating chamber (200); the second heating element (222) is used to heat the water vapor in the second heating chamber (200).

2. The steam generator according to claim 1, characterized in that: The heating part of the second heating element (222) is a heating coil, and a plurality of spaced partitions (2215) are arranged in the second box body (220), a steam passage (2210) is formed between the plurality of partitions (2215) and the second box body (220), and the heating coil is extended along the steam passage (2210).

3. The steam generator according to claim 2, characterized in that: Among the two adjacent partitions (2215), the first end of one of the partitions (2215) is connected to the first inner wall of the second box body (220), and the second end is spaced apart from the second inner wall of the second box body (220); the first end of the other partition (2215) is connected to the second inner wall of the second box body (220), and the second end is spaced apart from the first inner wall of the second box body (220); the first inner wall of the second box body (220) and the second inner wall of the second box body (220) are arranged opposite to each other.

4. The steam generator according to claim 2, characterized in that: The second box body (220) is located on the upper side of the first box body (210), the steam inlet hole (2214) is arranged on the lower side of the second box body (220) and located at the first end of the second box body (220), the second steam outlet hole (2213) is arranged on the upper side of the second box body (220) and located at the second end of the second box body (220), and the first end of the second box body (220) is arranged opposite to the second end of the second box body (220).

5. The steam generator according to any one of claims 1 to 4, characterized in that: The steam generator is mounted on the electrical appliance, the steam generator further comprising a first temperature detector (213) arranged on the first box body (210), the first temperature detector (213) being used to detect a temperature T1 in the first heating chamber (100); and / or It also includes a first sudden jump type thermostat (214) arranged on the first box body (210), and the first sudden jump type thermostat (214) is used to detect the temperature T1 in the first heating chamber (100) and control the circuit of the electrical appliance to be on and off according to T1.

6. The steam generator according to claim 5, characterized in that: The steam generator is installed on the electrical appliance, and the steam generator further comprises a second temperature detector (223) arranged on the second box body (220), and the second temperature detector (223) is used to detect the temperature T2 in the second heating chamber (200); and / or It also includes a second sudden-action thermostat (224) arranged on the second box body (220), wherein the second sudden-action thermostat (224) is used to detect the temperature T2 in the second heating chamber (200) and control the on-off of the circuit of the electrical appliance according to T2.

7. The steam generator according to claim 6, characterized in that: High-temperature thermal conductive silicone grease is provided between the first temperature detector (213) and the first box body (210), between the first sudden-action thermostat (214) and the first box body (210), between the second temperature detector (223) and the second box body (220), and between the second sudden-action thermostat (224) and the second box body (220).

8. A cooking device, characterized in that: It comprises a cooking cavity (1) and a steam generator (2) according to any one of claims 1 to 7, wherein the steam generator (2) is arranged on the outside of the cooking cavity (1), and the second steam outlet (2213) is connected to the cooking cavity (1).

9. The cooking device according to claim 8, characterized in that It also includes a water tank (3), a water pump (4), a flow meter (5) and a water pipe (6) arranged outside the cooking chamber (1); one end of the water pipe (6) is connected to the water outlet of the water tank (3) or the water supply pipe outside the cooking device; the other end of the water pipe (6) is connected to the water inlet (2114); the water pump (4) and the flow meter (5) are both installed on the water pipe (6).

10. The cooking device according to claim 8 or 9, characterized in that: It also comprises a third temperature detector (11) arranged on the cooking cavity (1), the third temperature detector (11) being used to detect the temperature T3 in the cooking cavity (1); and / or It also comprises a third sudden jump type temperature controller (12) arranged on the cooking cavity (1), and the third sudden jump type temperature controller (12) is used to detect the temperature T3 in the cooking cavity (1) and control the on and off of the circuit of the cooking device according to T3.

Images