Steam generator with multi-stage water-steam separation

Abstract

The present invention provides a steam generator with multi-stage water vapor separation, belonging to the technical field of steam ovens. The steam generator includes a steam generator body, a water vapor separation structure, and a heating device. The steam generator body includes a housing and a cover plate disposed on the top of the housing. The housing includes a bottom wall, a first side wall, a second side wall, a third side wall, and a fourth side wall. The first side wall is provided with a water inlet and an air outlet. The water inlet is connected to tap water, and the air outlet is connected to the water inlet. The water vapor separation structure divides the interior of the steam generator body into a first heating cold zone, a first heating hot zone, a second heating hot zone, and a condensing zone, which are connected in sequence. The water inlet is connected to the first heating cold zone, and the air outlet is connected to the condensing zone. The heating device is disposed in the first heating cold zone, the first heating hot zone, and the second heating hot zone. The present invention can perform multiple water vapor separations, prevent the simultaneous ejection of water and steam, and improve the quality of steam output by the evaporator.

Description

Technical Field

[0001] The present invention relates to the technical field of steam ovens, and in particular to a steam generator with multi-stage water vapor separation. Background Art

[0002] In the existing technology, many evaporators have unreasonable water vapor separation structures, which makes water vapor separation more difficult and makes the evaporator prone to water spraying, which in turn reduces the steam quality, increases the water consumption of the evaporator, prolongs the cooking time, increases the nutritional loss of ingredients, and worsens the taste and color of the ingredients. Summary of the Invention

[0003] The object of the present invention is to provide a steam generator with multi-stage water vapor separation, which can perform multiple water vapor separations through the water vapor separation structure and the heating device, thereby avoiding the simultaneous ejection of water and steam, reducing the water consumption of the evaporator, improving the quality of the steam output by the evaporator, and shortening the cooking time.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] According to one aspect of the present invention, a steam generator with multi-stage water vapor separation is provided. The steam generator with multi-stage water vapor separation comprises:

[0006] The steam generator body comprises a shell and a cover plate disposed on the top of the shell, wherein the shell comprises a bottom wall and a first side wall, a second side wall, a third side wall, and a fourth side wall sequentially connected to the bottom wall, wherein the first side wall is provided with a water inlet and an air outlet, wherein the water inlet is connected to tap water, and the air outlet is connected to the water inlet;

[0007] a water vapor separation structure, wherein the water vapor separation structure divides the interior of the steam generator body into a primary heating cold zone, a primary heating hot zone, a secondary heating hot zone, and a condensation zone, which are sequentially connected, the water inlet being connected to the primary heating cold zone, and the air outlet being connected to the condensation zone;

[0008] Heating devices are provided in the first-level heating cold zone, the first-level heating hot zone and the second-level heating hot zone;

[0009] The tap water flows into the first-level heating cold zone through the water inlet hole and is heated by the heating device to form warm water. The warm water enters the first-level heating hot zone and is heated again to form wet saturated steam. The wet saturated steam enters the second-level heating hot zone and is heated again to evaporate the water to form dry saturated steam. The dry saturated steam flows through the condensation zone and is ejected from the shell.

[0010] According to one embodiment of the present invention, the water vapor separation structure includes:

[0011] a first separation plate, the bottom of which is fixed to the bottom wall, and the two ends of which are respectively fixed to the first side wall and the third side wall of the shell;

[0012] a second separation plate, the bottom of which is fixed to the bottom wall, the top of which is fixed to the cover plate, and the ends of which are respectively fixed to the second side wall and the first separation plate;

[0013] a third separation plate, the bottom of which is fixed to the bottom wall, the top of which is fixed to the cover plate, and the ends of which are respectively connected to the first separation plate and the fourth side wall;

[0014] The first separation plate, the second separation plate and the third separation plate divide the interior of the shell into the primary heating cold zone, the primary heating hot zone, the secondary heating hot zone and the condensation zone;

[0015] The second separation plate is provided with a liquid passage hole and a second separation plate vent hole, wherein the liquid passage hole is close to the second side wall so that the warm water in the primary heating cold zone flows into the primary heating hot zone, and the second separation plate vent hole is close to the side of the first separation plate so that the unsaturated water vapor generated during the heating process of the primary heating cold zone flows into the primary heating hot zone;

[0016] A first separation plate vent is provided on the top of the first separation plate between the primary heating zone and the secondary heating zone, so that the wet saturated steam in the primary heating zone flows into the secondary heating zone through the first separation plate vent;

[0017] The third separation plate is provided with third separation plate through holes so that the dry saturated steam flows into the condensation zone.

[0018] According to one embodiment of the present invention, the housing is further provided with a water level probe, one end of which is fixedly connected to the end of the fourth side wall close to the first side wall, and the other end of which passes through the first separation plate and extends to the primary heating and cooling zone, for measuring the liquid level in the primary heating and cooling zone;

[0019] The liquid level of the primary heating cold zone is located below the first separation plate vent hole and the second separation plate vent hole.

[0020] According to one embodiment of the present invention, the ratio of the area of the ventilation holes of the first separation plate to the area of the air outlet holes is b, wherein 1 <b≤2;

[0021] The area ratio of the liquid passage hole to the water inlet hole is greater than 5;

[0022] The area ratio of the ventilation holes of the second separation plate to the air outlet holes is greater than 1 / 3;

[0023] The area ratio of the through - hole of the third separation plate to the area of the air outlet is c, where 1 < c ≤ 2, so that the dry saturated steam can quickly fill the condensation area and be ejected from the air outlet.

[0024] According to an embodiment of the present invention, the water - vapor separation structure further includes a water - blocking strip corresponding to the ventilation hole of the first separation plate. The top surface of the water - blocking strip is fixedly connected to the bottom surface of the cover plate. Some molecules in the wet saturated steam condense to form saturated liquid, and the water - blocking strip is used to prevent the saturated liquid from flowing into the secondary heating hot zone;

[0025] A condensate water partition plate corresponding to the air outlet is arranged in the condensation area to prevent the condensate water from being ejected from the air outlet.

[0026] According to an embodiment of the present invention, the heating device includes:

[0027] A primary heating component, arranged in the primary heating cold zone and the primary heating hot zone, includes a first heating tube cover and a primary heating tube. The first heating tube cover is fixedly connected to the bottom wall, and the primary heating tube is arranged inside the first heating tube cover;

[0028] A secondary heating component, arranged in the secondary heating hot zone, includes a second heating tube cover and a secondary heating tube. The secondary heating tube is arranged inside the second heating tube cover.

[0029] According to an embodiment of the present invention, the heating device further includes:

[0030] A first heating plate group, located in the primary heating cold zone and fixedly connected to the first heating tube cover, is used to heat the tap water and form the warm water;

[0031] A second heating plate group, located in the primary heating hot zone and fixedly connected to the first heating tube cover, is used to continue heating the warm water to form the wet saturated steam;

[0032] A third heating plate group, located in the secondary heating hot zone and fixedly connected to the second heating tube cover, is used to heat again to evaporate the water to form the dry saturated steam.

[0033] According to an embodiment of the present invention, the first heating plate group includes a first horizontal plate, a first vertical plate perpendicular to the first horizontal plate, and a vertical plate. The vertical plate is fixedly connected to the first vertical plate far from the water level probe. Part of the warm water can boil at the vertical plate to generate unsaturated water vapor, and the unsaturated water vapor enters the primary heating hot zone through the vertical plate and the ventilation hole of the second separation plate, preventing misjudgment of the water level probe;

[0034] The second heating plate group includes a second horizontal plate, a second vertical plate and a third vertical plate, wherein the second vertical plate and the third vertical plate have different heights and are respectively perpendicular to the second horizontal plate, so as to increase the heat exchange area between the primary heating tube and the warm water;

[0035] The third heating plate group includes a plurality of heating plates, wherein the plurality of heating plates are distributed in a grid shape, and are used to increase the heat exchange area between the water vapor and the secondary heating tube, so as to improve the dryness and temperature of the dry saturated steam.

[0036] According to one embodiment of the present invention, the second vertical plate and the third vertical plate are both plural, and the plural second vertical plates and the plural third vertical plates are distributed at intervals;

[0037] The ratio of the height of the second vertical plate to the height of the third vertical plate is 0.3-0.8, so that the warm water boils between the two third vertical plates and the wet saturated steam rises along the third vertical plates. The second vertical plate is used to control the water temperature height after the warm water boils.

[0038] According to one embodiment of the present invention, the ends of the second vertical plate and the third vertical plate close to the first separation plate are both provided with arc-shaped portions, and the arc-shaped portions are used to guide the wet saturated steam to the first heating pipe cover to achieve water vapor separation;

[0039] The ratio of the power of the first-level heating tube to the power of the second-level heating tube is 1-3.

[0040] An embodiment of the present invention has the following advantages or beneficial effects:

[0041] The steam generator with multi-stage water vapor separation of the present invention divides the interior of the evaporator body into a primary heating cold zone, a primary heating hot zone, a secondary heating hot zone and a condensation zone through the water vapor separation structure and the heating device. It can perform multiple water vapor separations to avoid the simultaneous ejection of water and steam, reduce the water consumption of the evaporator, improve the quality of the steam output by the evaporator, and shorten the cooking time.

[0042] By adjusting the height difference and spacing distribution of the second vertical plate and the third vertical plate in the secondary heating hot zone, the water level during boiling can be controlled, and at the same time, the wet saturated steam rises along the third vertical plate, thereby achieving effective water vapor separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0044] Figure 1FIG. 1 is a schematic diagram of a steam generator with multi-stage water vapor separation according to an exemplary embodiment.

[0045] Figure 2 is a cross-sectional view showing a steam generating device with multi-stage water vapor separation according to an exemplary embodiment.

[0046] Figure 3 FIG1 is a schematic diagram showing the connection between a housing, a water vapor separation structure, a heating assembly, and a water level probe according to an exemplary embodiment.

[0047] Figure 4 It is a schematic diagram showing the connection between the shell, the water vapor separation structure, and the heating component according to an exemplary embodiment.

[0048] The description of the accompanying drawings is as follows:

[0049] 1. Shell; 11. Primary heating cold zone; 12. Primary heating hot zone; 13. Secondary heating hot zone; 14. Condensation zone; 141. Condensate baffle; 100. Water inlet; 101. Air outlet;

[0050] 2. Cover plate;

[0051] 3. Water vapor separation structure; 31. First separation plate; 311. First separation plate vent; 32. Second separation plate; 321. Liquid passage hole; 33. Third separation plate; 34. Water retaining strip;

[0052] 4. Heating device; 41. Primary heating assembly; 411. First heating tube cover; 412. Primary heating tube; 42. Secondary heating assembly; 421. Second heating tube cover; 422. Secondary heating tube; 43. First heating plate group; 431. First horizontal plate; 432. First vertical plate; 433. Vertical plate; 44. Second heating plate group; 441. Second horizontal plate; 442. Second vertical plate; 443. Third vertical plate; 45. Third heating plate group; 451. Heating plate;

[0053] 5. Water level probe; 6. Temperature controller. DETAILED DESCRIPTION

[0054] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0055] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0056] like Figures 1 to 4 As shown, Figure 1 A schematic diagram of a steam generator with multi-stage water vapor separation provided by the present invention is shown. Figure 2 A cross-sectional view of a steam generator with multi-stage water vapor separation provided by the present invention is shown. Figure 3 A schematic diagram of the housing 1 , the water vapor separation structure 3 , the heating assembly 4 and the water level probe 5 provided by the present invention is shown. Figure 4 It shows a connection diagram of the housing 1, the water vapor separation structure 3 and the heating component 4 provided by the present invention.

[0057] A steam generator with multi-stage water vapor separation for supplying and exhausting flue gas to a wall-mounted gas boiler according to an embodiment of the present invention comprises: a steam generator body, comprising a shell 1 and a cover plate 2 disposed on the top of the shell 1, wherein the shell 1 comprises a bottom wall and a first side wall, a second side wall, a third side wall, and a fourth side wall sequentially connected to the bottom wall, the first side wall being provided with a water inlet 100 and an air outlet 101, wherein the water inlet 100 is connected to tap water, and the air outlet 101 is connected to the water inlet 100;

[0058] The water vapor separation structure 3 divides the interior of the steam generator body into a primary heating cold zone 11, a primary heating hot zone 12, a secondary heating hot zone 13, and a condensation zone 14, which are connected in sequence. The water inlet 100 is connected to the primary heating cold zone 11, and the air outlet 101 is connected to the condensation zone 14.

[0059] The heating device 4 is provided in the first-level heating cold zone 11, the first-level heating hot zone 12 and the second-level heating hot zone 13;

[0060] Among them, tap water flows into the first-level heating cold zone 11 through the water inlet 100 and is heated by the heating device 4 to form warm water. The warm water enters the first-level heating hot zone 12 and is heated again to form wet saturated steam. The wet saturated steam enters the second-level heating hot zone 13 and is heated again to evaporate the water to form dry saturated steam. The dry saturated steam flows through the condensation zone 14 and is ejected from the shell 1.

[0061] Among them, the cover plate 2 is arranged on the top of the shell 1, and the shell 1 and the cover plate 2 are fixed by bolts, which is convenient for installing, inspecting and maintaining the components in the shell 1. The interior of the steam generator body is divided into four zones by the water vapor separation structure 3, namely the first-level heating cold zone 11, the first-level heating hot zone 12, the second-level heating hot zone 13 and the condensation zone 14, so that the tap water flows into the first-level heating cold zone 11 through the water inlet 100 and is heated by the heating device 4 to form warm water. In this embodiment, warm water refers to water with a temperature greater than room temperature and less than boiling point. In the process of tap water becoming warm water, unsaturated water vapor will be generated at the same time. In addition, warm water and unsaturated water vapor enter the first-level heating hot zone 12, and the warm water and unsaturated steam are heated again in the first-level heating hot zone 12 to form wet saturated steam. At this time The wet saturated steam enters the secondary heating hot zone 13 and is heated again to evaporate the water to form dry saturated steam. The dry saturated steam enters the condensation zone 14 and is ejected from the shell 1. The evaporator body is divided into a primary heating cold zone 11, a primary heating hot zone 12, a secondary heating hot zone 13 and a condensation zone 14 through the water vapor separation structure 3 and the heating device 4. The evaporator can perform multiple water vapor separations to avoid the simultaneous ejection of water and steam. Since the water ejected from the evaporator will affect the taste or quality of the food, it will also condense and form accumulated water in the cavity of the steam oven. The present invention can reduce the water consumption of the evaporator and improve the quality of the steam output by the evaporator through multi-stage separation of water vapor, shorten the cooking time, increase the moisture content of the food, reduce the hardness of the food, improve the chewiness, and retain more nutrients.

[0062] In addition, the steam generator body is also equipped with a temperature controller 6. In this embodiment, there are no fewer than three temperature controllers 6, each used to measure the temperature of the primary heating cold zone 11, the primary heating hot zone 12, and the secondary heating hot zone 13. The temperature can provide feedback on the status of the primary heating cold zone 11, the primary heating hot zone 12, and the secondary heating hot zone 13. For example, if the temperature of the primary heating cold zone 11 is too high, it indicates insufficient water replenishment. The amount of water replenishment should be increased or the container should be checked for other faults. In addition, the appropriate temperature can maximize the efficiency of steam generation. The temperature controller 6 can timely adjust the output power of the heating device 4, thereby reducing cooking time.

[0063] In a preferred embodiment of the present invention, the water vapor separation structure 3 comprises:

[0064] The first separation plate 31 has a bottom fixed to the bottom wall, and two ends fixed to the first side wall and the third side wall of the housing 1 respectively;

[0065] The second separation plate 32 is fixed to the bottom wall at the bottom, fixed to the cover plate 2 at the top, and fixed to the second side wall and the first separation plate 31 at both ends;

[0066] The third separation plate 33 is fixed to the bottom wall at the bottom, fixed to the cover plate 2 at the top, and connected to the first separation plate 31 and the fourth side wall at both ends;

[0067] The first separation plate 31 is located between the primary heating cold zone 11, the primary heating hot zone 12, the secondary heating hot zone 13, and the condensing zone 14; the second separation plate 32 is located between the primary heating cold zone 11 and the primary heating hot zone 12; and the third separation plate 33 is located between the secondary heating hot zone 13 and the condensing zone 14. The first separation plate 31, the second separation plate 32, and the third separation plate 33 divide the interior of the shell 1 into the primary heating cold zone 11, the primary heating hot zone 12, the secondary heating hot zone 13, and the condensing zone 14.

[0068] The second separation plate 32 is provided with a liquid passage hole 321 and a second separation plate vent hole. The liquid passage hole 321 is close to the second side wall to allow warm water in the primary heating cold zone 11 to flow into the primary heating hot zone 12. The second separation plate vent hole is close to the side of the first separation plate 31 to allow unsaturated water vapor generated during the heating process of the primary heating cold zone 11 to flow into the primary heating hot zone 12.

[0069] A first separation plate vent 311 is provided on the top of the first separation plate 31 between the primary heating zone 12 and the secondary heating zone 13, so that water vapor with moisture in the primary heating zone 12 flows into the secondary heating zone 13 through the first separation plate vent 311;

[0070] The third separation plate 33 is provided with third separation plate through-holes to allow the dry saturated steam to flow into the condensation zone 14 .

[0071] The shell 1 is also provided with a water level probe 5, one end of the water level probe 5 is fixedly connected to the end of the fourth side wall close to the first side wall, and the other end extends through the first separation plate 31 to the primary heating and cold zone 11, for measuring the liquid level of the primary heating and cold zone 11, and the water level of the primary heating and cold zone 11 is located below the vent hole 311 of the first separation plate.

[0072] like Figure 3-4As shown, the water vapor separation structure 3 realizes the partitioning of the evaporator body by the first separation plate 31, the second separation plate 32 and the third separation plate 33; since warm water and non-humid saturated steam are simultaneously generated in the heating process of the primary heating cold zone 11, the second separation plate 32 is provided with a liquid hole 321 and a second separation plate vent hole, the liquid hole 321 is close to the second side wall, that is, above the heating device 4, and the second separation plate vent hole is located on the second separation plate 32 on the side close to the first separation plate 31, and the liquid hole 321 is located obliquely below the second separation plate vent hole, that is, the height of the liquid hole 321 from the bottom of the shell 1 is less than the height of the second separation plate vent hole from the bottom of the shell 1. In addition, the warm water in the primary heating cold zone 11 flows into the primary heating hot zone 12 through the liquid hole 321. At the same time, the non-saturated water vapor generated in the heating process of the primary heating cold zone 11 flows into the primary heating hot zone 12 through the second separation plate vent hole and the first separation plate 31, thereby realizing the preliminary separation of water vapor;

[0073] The primary heating zone 12 continues to heat the warm water and boil it. As the warm water gradually boils, water molecules move upward, some of which condense, and some pass through the first separation plate vents 311 in gaseous form. After boiling, the vaporization and condensation of water are basically balanced, forming wet saturated steam. The wet saturated steam enters the secondary heating zone 13 through the first separation plate vents 311.

[0074] The secondary heating hot zone 13 continues to heat the wet saturated steam, which can cause the water in the wet saturated steam to continue to evaporate and form dry saturated steam. The dry saturated steam flows into the condensation zone 14 through the third separation plate 33, condenses and sprays out of the shell 1 into the cavity of the steam oven to heat and dry the food.

[0075] In this embodiment, a water level probe 5 is provided to measure the liquid level of the first-stage heating and cooling zone 11. In this embodiment, the water level probe 5 can simultaneously measure the lowest liquid level and the highest liquid level of the first-stage heating and cooling zone 11. The controller on the evaporator or steam oven can control the water inlet speed and the water inlet amount of the water inlet hole 100 at the lowest liquid level and the highest liquid level, so that the liquid level in the evaporator body is always between the lowest liquid level and the highest liquid level, avoiding too little water affecting the product performance, and also avoiding too much water, resulting in excessive water spraying out of the evaporator and affecting the steam quality of the evaporator.

[0076] Among them, the minimum liquid level and the maximum liquid level are the set values of the evaporator. In addition, the lowest point of the liquid hole 321 is located below the minimum liquid level, and the lowest point of the second separation plate vent is located above the maximum liquid level, so that the warm water generated in the first-level heating cold zone 11 can only enter the first-level heating hot zone 12 through the overnight hole 321. At the same time, the maximum liquid level must also be located below the first separation plate vent 311 to prevent water from entering the secondary heating hot zone 13.

[0077] In a preferred embodiment of the present invention, the area ratio of the first separation plate ventilation hole 311 to the air outlet hole 101 is b, where 1 < b ≤ 2;

[0078] The area ratio of the liquid passing hole 321 to the water inlet hole 100 is greater than 5;

[0079] The area ratio of the second separation plate ventilation hole to the air outlet hole 101 is greater than 1 / 3;

[0080] The area ratio of the through hole of the third separation plate to the air outlet hole 101 is c, where 1 < c ≤ 2, so that dry saturated steam can quickly fill the condensation area 14 and spray out from the air outlet hole 101.

[0081] As Figure 3-4 shown, tap water enters the first-stage heating cold area 11 through the water inlet hole 100. The area ratio of the liquid passing hole 321 to the water inlet hole 100 is greater than 5, which can make the warm water in the first-stage heating cold area 11 flow smoothly into the first-stage heating hot area 12; the area ratio of the second separation plate ventilation hole to the air outlet hole 101 is greater than 1 / 3, which can make the unsaturated air in the first-stage heating cold area 11 quickly enter the first-stage heating hot area 12 and avoid affecting the water level probe 5.

[0082] As the temperature in the first-stage heating hot area 12 continuously rises, the pressure in the first-stage heating hot area 12 continuously increases. The first separation plate ventilation hole 311 is arranged near the third side wall. The first separation plate ventilation hole 311 can be multiple. The area ratio of the multiple first separation plate ventilation holes 311 to the air outlet hole 101 is b, where 1 < b ≤ 2, preferably 1.1 - 1.2. The first separation plate ventilation hole 311 enables the gas in the first-stage heating hot area 12 to flow smoothly into the second-stage heating hot area 13 and can be fully heated in the second-stage heating hot area 13 at the same time.

[0083] The area ratio of the through hole of the third separation plate to the air outlet hole 101 is c, where 1 < b ≤ 2, so that dry saturated steam can quickly fill the condensation area 14 and spray out from the air outlet hole 101.

[0084] In a preferred embodiment of the present invention, the water-vapor separation structure 3 further includes a water-blocking strip 34 corresponding to the first separation plate ventilation hole 311. The top surface of the water-blocking strip 34 is fixedly connected to the bottom surface of the cover plate 2. Some molecules in the wet saturated steam condense to form saturated liquid. The water-blocking strip 34 is used to prevent the saturated liquid from flowing into the second-stage heating hot area 13;

[0085] The condensation area 14 is provided with a condensate water partition plate 141 corresponding to the air outlet hole 101, which is used to prevent the condensate water from spraying out from the air outlet hole 101.

[0086] As Figure 1-4As shown, during the heating process of the primary heating zone 12, steam molecules contact the liquid surface, the bottom surface of the shell 1 or the cover plate 2 and condense to form a saturated liquid. The water retaining bar 34 can prevent the saturated liquid from entering the secondary heating zone 13. In this embodiment, the water retaining bar 34 must maintain a certain distance from the first separation plate 31. At the same time, the projection of the water retaining bar 34 on the first separation plate 31 can partially or completely block the air vents 311 of the first separation plate to prevent steam molecules with water from directly entering the secondary heating zone 13.

[0087] In addition, the dry saturated steam can form condensed water with the container wall at the condensation area 14, and the condensed water partition 141 can prevent the condensed water from spraying out of the air outlet 101, which can improve the steam quality.

[0088] In a preferred embodiment of the present invention, the heating device 4 comprises:

[0089] The primary heating assembly 41 is disposed in the primary heating cold zone 11 and the primary heating hot zone 12, and includes a first heating pipe cover 411 and a primary heating pipe 412, wherein the first heating pipe cover 411 is fixed to the bottom wall, and the primary heating pipe 412 is disposed in the first heating pipe cover 411;

[0090] The secondary heating assembly 42 is disposed in the secondary heating hot zone 13 , and includes a second heating tube cover 421 and a secondary heating tube 422 , wherein the secondary heating tube 422 is disposed in the second heating tube cover 421 .

[0091] The heating device 4 also includes:

[0092] The first heating plate group 43 is located in the primary heating cold zone 11 and is fixed to the first heating pipe cover 411 for heating tap water and forming warm water;

[0093] The second heating plate group 44 is located in the primary heating zone 12 and is fixed to the first heating pipe cover 411 for continuing to heat the warm water to form wet saturated water vapor;

[0094] The third heating plate group 45 is located in the secondary heating zone 13 and is fixed to the second heating pipe cover 421 for heating again to evaporate the water to form dry saturated steam.

[0095] like Figure 3-4 As shown, the first heating pipe cover 411 passes through the first side wall and the third side wall, and the first-level heating pipe 412 is inserted into the first heating pipe cover 411. The first-level heating pipe 412 heats the tap water in the first-level heating cold zone 11 through the first heating plate group 43 to form warm water. The warm water enters the first-level heating hot zone 12 through the liquid hole 321 and passes through the second heating plate group 44 to boil the water in the first-level heating hot zone 12 to form wet saturated steam.

[0096] Second heating pipe housing 421 passes through the third and fourth side walls of secondary heating zone 13. Secondary heating pipe 422 is inserted into second heating pipe housing 421. The third heating plate assembly 45 further increases the dryness and temperature of the wet saturated steam to form dry saturated steam. By cooperating with the water vapor separation structure 3, water vapor separation occurs in primary heating cold zone 11, primary heating hot zone 12, secondary heating hot zone 13, and condensation zone 14. This rational structure ensures high-quality steam output.

[0097] In a preferred embodiment of the present invention, the first heating plate group 43 includes a first horizontal plate 431, a first vertical plate 432 perpendicular to the first horizontal plate 431, and a vertical plate 433, wherein the vertical plate 433 is fixed to the first vertical plate 432 away from the water level probe 5, and part of the warm water can boil at the vertical plate 433 to generate unsaturated water vapor. The unsaturated water vapor enters the primary heating hot zone 12 through the vertical plate 433 and the vent hole to prevent the water level probe 5 from misjudging.

[0098] The second heating plate group 44 includes a second horizontal plate 441, a second vertical plate 442, and a third vertical plate 443. The second vertical plate 442 and the third vertical plate 443 have different heights and are perpendicular to the second horizontal plate 441 to increase the heat exchange area.

[0099] The third heating plate group 45 includes a plurality of heating plates 451 , wherein the plurality of heating plates 451 are distributed in a grid pattern, and are used to increase the heat exchange area between the water vapor and the secondary heating tube 422 , so as to improve the dryness and temperature of the water vapor.

[0100] like Figure 3-4 As shown, the first-level heating cold zone 11 is composed of multiple first horizontal plates 431 and a first vertical plate 432, which form a grid structure and can increase the heat exchange in the area. Since the water level probe 5 is located in the first-level heating cold zone 11 near the first side wall, in order to avoid the unsaturated water vapor affecting the judgment of the water level probe 5 during the heating process, this embodiment sets a vertical plate 433 on the first vertical plate 432 away from the first side wall. The vertical plate 433 can not only increase the heat exchange area, but also divert the unsaturated steam to avoid misjudgment of the water level probe 5. In order to make the tap water heat up or boil in advance near the second separation plate 32, the surface of the second vertical plate 432 near the second separation plate 32 can also be increased to increase the heat exchange area.

[0101] There are multiple second vertical plates 442 and third vertical plates 443, and the multiple second vertical plates 442 and third vertical plates 443 are all perpendicular to the second horizontal plate 441, so that the second horizontal plate 441, the second vertical plate 442 and the third vertical plate 443 are projected in a grid shape on the top surface of the first heating tube cover 411. In addition, since the heights of the second vertical plates 442 and the third vertical plates 443 are different, not only can the heat exchange area be increased and the water can boil along the grid, but the boiling height can also be controlled, and the boiling height can be limited between the two third vertical plates 443. At the same time, the steam can rise along the third vertical plates 443, thereby improving the water vapor separation effect.

[0102] The multiple heating plates 451 are distributed in a grid pattern, which can increase the heat exchange area, slow down the air flow speed to fully heat the wet saturated steam, and increase the steam dryness and temperature before it flows out of the evaporator.

[0103] In a preferred embodiment of the present invention, the second vertical plate 442 and the third vertical plate 443 are both plural, and the plural second vertical plates 442 and the third vertical plates 443 are distributed at intervals;

[0104] Among them, the height ratio of the second vertical plate 442 to the third vertical plate 443 is 0.3-0.8, so that the warm water boils between the two third vertical plates 443, and the wet saturated steam rises along the third vertical plate 443. The second vertical plate 442 is used to control the water temperature height after the warm water boils.

[0105] like Figure 3-4 As shown, the second vertical plate 442 and the third vertical plate 443 in the primary heating hot zone 12 are spaced apart, and the second horizontal plate 441 and the second vertical plate 442 between adjacent third vertical plates 443 form a grid portion. The temperature of this grid portion is relatively high and can boil. Since the height ratio of the second vertical plate 442 to the third vertical plate 443 is 0.3-0.8, this design can wrap the boiling water with the adjacent third vertical plate 443, control the water level during boiling, and make the wet saturated steam rise along the third vertical plate 443. Through the above structure, effective water vapor separation can be achieved to prevent excessive moisture from entering the secondary heating hot zone 13.

[0106] In a preferred embodiment of the present invention, the second vertical plate 442 and the third vertical plate 443 are both provided with arc portions at their ends close to the first separation plate 31 , and the arc portions are used to guide the wet saturated steam to the first heating pipe cover 411 to achieve water vapor separation.

[0107] The ratio of the power of the first-stage heating tube 412 to the power of the second-stage heating tube 422 is 1-3.

[0108] like Figure 2-4As shown, the second vertical plate 442 and the third vertical plate 443 in the primary heating hot zone 12 are both provided with arc-shaped portions, which can increase the heat exchange area on the one hand, and on the other hand can guide the boiling water to the second heating tube cover 421 and the space above the second heating tube cover 421, thereby preventing the steam molecules to be hydrated generated after boiling from directly entering the secondary heating hot zone 13, thereby achieving the purpose of water vapor separation.

[0109] The first-level heating tube 412 and the second-level heating tube 422 correspond to different areas respectively. The power of the first-level heating tube 412 and the power of the second-level heating tube 422 can convert tap water into steam. In this embodiment, when the power of the first-level heating tube 412 and the power of the second-level heating tube 422 are 1~3, the tap water can be converted into wet saturated steam, and the wet saturated steam can be further heated and the dryness of the wet saturated steam can be increased to form dry saturated steam. The food in the steam oven is processed by outputting the dry saturated steam.

[0110] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on specific circumstances.

[0111] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0112] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0113] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible in the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A steam generator with multi-stage water vapor separation, characterized in that: include: A steam generator body comprises a shell (1) and a cover plate (2) arranged on the top of the shell (1), wherein the shell (1) comprises a bottom wall and a first side wall, a second side wall, a third side wall and a fourth side wall connected to the bottom wall in sequence, the first side wall is provided with a water inlet (100) and an air outlet (101), wherein the water inlet (100) is connected to tap water, and the air outlet (101) is connected to the water inlet (100); A water vapor separation structure (3), wherein the water vapor separation structure divides the interior of the steam generator body into a primary heating cold zone (11), a primary heating hot zone (12), a secondary heating hot zone (13), and a condensation zone (14) that are connected in sequence, the water inlet (100) is connected to the primary heating cold zone (11), and the air outlet (101) is connected to the condensation zone (14); A heating device (4) is provided in the first-stage heating cold zone (11), the first-stage heating hot zone (12), and the second-stage heating hot zone (13); The tap water flows into the primary heating cold zone (11) through the water inlet (100) and is heated by the heating device (4) to form warm water. The warm water enters the primary heating hot zone (12) and is heated again to form wet saturated steam. The wet saturated steam enters the secondary heating hot zone (13) and is heated again to evaporate the water to form dry saturated steam. The dry saturated steam flows through the condensation zone (14) and is ejected from the shell (1).

2. The steam generator with multi-stage water vapor separation according to claim 1, characterized in that: The water vapor separation structure (3) comprises: A first separation plate (31), the bottom of which is fixed to the bottom wall, and the two ends of which are respectively fixed to the first side wall and the third side wall of the shell (1); A second separation plate (32), the bottom of which is fixed to the bottom wall, the top of which is fixed to the cover plate (2), and the two ends of which are respectively fixed to the second side wall and the first separation plate (31); A third separation plate (33), the bottom of which is fixed to the bottom wall, the top of which is fixed to the cover plate (2), and the two ends of which are respectively connected to the first separation plate (31) and the fourth side wall; The first separation plate (31), the second separation plate (32) and the third separation plate (33) divide the interior of the shell (1) into the primary heating cold zone (11), the primary heating hot zone (12), the secondary heating hot zone (13) and the condensation zone (14); The second separation plate (32) is provided with a liquid hole (321) and a second separation plate vent hole, wherein the liquid hole (321) is close to the second side wall so that the warm water in the first-stage heating cold zone (11) flows into the first-stage heating hot zone (12), and the second separation plate vent hole is close to the side of the first separation plate (31) so that the unsaturated water vapor generated during the heating process of the first-stage heating cold zone (11) flows into the first-stage heating hot zone (12); A first separation plate ventilation hole (311) is provided at the top of the first separation plate (31) between the first-stage heating hot zone (12) and the second-stage heating hot zone (13), so that the wet saturated steam in the first-stage heating hot zone (12) flows into the second-stage heating hot zone (13) through the first separation plate ventilation hole (311); The third separation plate (33) is provided with a third separation plate through hole, so that the dry saturated steam flows into the condensation zone (14).

3. The steam generator with multi-stage water vapor separation according to claim 2, characterized in that: The housing (1) is further provided with a water level probe (5). One end of the water level probe (5) is fixedly connected to the end of the fourth side wall close to the first side wall, and the other end passes through the first separation plate (31) and extends to the first-stage heating cold zone (11) for measuring the liquid level of the first-stage heating cold zone (11); The liquid level of the first-stage heating cold zone (11) is located below the first separation plate ventilation hole (311) and the second separation plate ventilation hole.

4. The steam generator with multi-stage water-vapor separation according to claim 3, wherein The area ratio of the first separation plate ventilation hole (311) to the air outlet hole (101) is b, where 1 < b ≤ 2; The area ratio of the liquid passing hole (321) to the water inlet hole (100) is greater than 5; The area ratio of the second separation plate ventilation hole to the air outlet hole (101) is greater than 1 / 3; The area ratio of the third separation plate through hole to the air outlet hole (101) is c, where 1 < c ≤ 2, so that the dry saturated steam quickly fills the condensation zone (14) and is ejected from the air outlet hole (101).

5. The steam generator with multi-stage water-vapor separation according to claim 2, wherein The water-vapor separation structure (3) further includes a water retaining strip (34) corresponding to the first separation plate ventilation hole (311). The top surface of the water retaining strip (34) is fixedly connected to the bottom surface of the cover plate (2). Some molecules in the wet saturated steam condense to form saturated liquid, and the water retaining strip (34) is used to prevent the saturated liquid from flowing into the second-stage heating hot zone (13); The condensation zone (14) is provided with a condensate water partition plate (141) corresponding to the air outlet hole (101) for preventing condensate water from being ejected from the air outlet hole (101).

6. The steam generator with multi-stage water vapor separation according to claim 4, characterized in that: The heating device (4) includes: A first-stage heating component (41) is arranged in the first-stage heating cold zone (11) and the first-stage heating hot zone (12), and includes a first heating tube cover (411) and a first-stage heating tube (412). Among them, the first heating tube cover (411) is fixedly connected to the bottom wall, and the first-stage heating tube (412) is arranged in the first heating tube cover (411); A second-stage heating component (42) is arranged in the second-stage heating hot zone (13), and includes a second heating tube cover (421) and a second-stage heating tube (422). Among them, the second-stage heating tube (422) is arranged in the second heating tube cover (421).

7. The steam generator with multi-stage water vapor separation according to claim 6, characterized in that: The heating device (4) further includes: A first heating plate group (43) is located in the primary heating cold zone (11) and is fixedly connected to the first heating pipe cover (411), and is used to heat the tap water and form the warm water; a second heating plate group (44), located in the primary heating hot zone (12) and fixedly connected to the first heating pipe cover (411), for continuing to heat the warm water to form the wet saturated steam; The third heating plate group (45) is located in the secondary heating hot zone (13) and is fixed to the second heating pipe cover (421) for heating again to evaporate the water to form the dry saturated steam.

8. The steam generator with multi-stage water vapor separation according to claim 7, characterized in that: in, The first heating plate group (43) includes a first horizontal plate (431), a first vertical plate (432) perpendicular to the first horizontal plate (431), and a vertical plate (433), wherein the vertical plate (433) is fixed to the first vertical plate (432) away from the water level probe (5), and part of the warm water can boil at the vertical plate (433) to generate unsaturated water vapor, and the unsaturated water vapor enters the primary heating hot zone (12) through the vertical plate (433) and the second separation plate vent, thereby preventing the water level probe (5) from misjudging; The second heating plate group (44) includes a second horizontal plate (441), a second vertical plate (442) and a third vertical plate (443), wherein the second vertical plate (442) and the third vertical plate (443) have different heights and are respectively perpendicular to the second horizontal plate (441), so as to increase the heat exchange area between the first-level heating tube (412) and the warm water; The third heating plate group (45) includes a plurality of heating plates (451), wherein the plurality of heating plates (451) are distributed in a grid pattern, and are used to increase the heat exchange area between the water vapor and the secondary heating tube (422), so as to improve the dryness and temperature of the dry saturated steam.

9. The steam generator with multi-stage water vapor separation according to claim 8, characterized in that: There are multiple second vertical plates (442) and multiple third vertical plates (443), and the multiple second vertical plates (442) and the multiple third vertical plates (443) are distributed at intervals; The ratio of the height of the second vertical plate (442) to the height of the third vertical plate (443) is 0.3-0.8, so that the warm water boils between the two third vertical plates (443) and the wet saturated steam rises along the third vertical plates (443). The second vertical plate (442) is used to control the water temperature height after the warm water boils.

10. The steam generator with multi-stage water vapor separation according to claim 8, characterized in that: The second vertical plate (442) and the third vertical plate (443) are both provided with arc-shaped portions at their ends close to the first separation plate (31), and the arc-shaped portions are used to guide the wet saturated steam to the first heating pipe cover (411) to achieve water vapor separation; The ratio of the power of the first-level heating tube (412) to the power of the second-level heating tube (422) is 1-3.

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