Double-evaporator internal circulation system

Abstract

The utility model relates to the technical field of steam cooking equipment, in particular to a double-evaporator internal circulation system. Comprising a box body provided with a cooking chamber, a first evaporator arranged on the outer side of the box body, a second evaporator arranged in the box body, a condensation system, a flow guide system used for guiding condensate water in the condensation system to the inner wall of the cooking chamber and a water tank. The condensing system, the first evaporator and the second evaporator are all communicated with the cooking chamber, the water tank is communicated with the first evaporator, and a first water inlet pump is arranged between the first evaporator and the water tank. According to the utility model, the two groups of evaporators are matched with each other, so that the steam internal circulation in the cooking equipment is realized, and the steam quantity generated in the cooking process is greatly increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of steam cooking equipment, more particularly to a double evaporator internal circulation system. BACKGROUND

[0002] With the continuous improvement of living standards, more and more steam ovens and ovens enter the kitchen of ordinary families, but for some small kitchens, the addition of steam ovens and ovens will occupy a large amount of kitchen space. In order to improve the space utilization, cooking equipment manufacturers have launched steam ovens, which have added steam function on the basis of ordinary ovens, and have the functions of steaming and baking. It can increase the humidity of the baking environment and avoid the food being too dry and hard.

[0003] In the prior art, such as Chinese patent CN110811304A, a steam cooking equipment is disclosed, which includes a box body and a steam condensation reflux assembly. One end of the steam condensation reflux assembly is connected with the cavity of the box body for water vapor separation of steam discharged into the steam condensation reflux assembly. The other end of the steam condensation reflux assembly is connected with the exhaust port of the box body for discharging the gas after water vapor separation out of the box body. The steam condensation reflux assembly guides the water after water vapor separation back into the cavity of the box body. However, the steam cooking equipment only contains a single steam generator, and cannot realize continuous evaporation during steaming and baking, and the amount of steam provided is small. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiency of the prior art that only contains a single steam generator, cannot realize continuous evaporation during steaming and baking, and provides a small amount of steam. A double evaporator internal circulation system is provided, which realizes internal circulation of steam in the cooking equipment through the cooperation between the two groups of evaporators, and greatly improves the amount of steam generated during cooking.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A double evaporator internal circulation system is provided, which includes a box body provided with a cooking chamber, a first evaporator arranged outside the box body, a second evaporator arranged inside the box body, a condensation system, a water diversion system for diverting condensate water in the condensation system to the inner wall of the cooking chamber, and a water tank. The condensation system, the water diversion system and the water tank are connected with the box body. The condensation system, the first evaporator and the second evaporator are in communication with the cooking chamber. The water tank is in communication with the first evaporator. A first water inlet pump is arranged between the first evaporator and the water tank.

[0007] In the operation of this invention's dual-evaporator internal circulation system, water is first drawn from the water tank into the first evaporator via a first inlet pump. The first evaporator then begins operation, and the evaporated steam enters the cooking chamber, where it heats the food. Simultaneously, some steam enters the condensation system, which converts the steam into condensate. A flow guiding system directs the condensate to the inner wall of the cooking chamber, where it flows down the wall and enters the second evaporator located inside the unit. The second evaporator reheats the condensate back into steam, which then participates in the food heating process within the cooking chamber. This dual-evaporator internal circulation system, through the cooperation of the two sets of evaporators, achieves internal steam circulation within the cooking equipment, reducing water tank consumption and ensuring that at least one set of evaporators is operational during operation, significantly increasing the amount of steam generated during cooking.

[0008] Furthermore, the second evaporator has an evaporation chamber at its top and a first heating element at its bottom. The flow guiding system directs the condensate generated in the condensation system to the inner wall of the cooking chamber. The condensate flows along the inner wall of the cooking chamber to the evaporation chamber on the second evaporator. The first heating element continuously heats the water in the evaporation chamber into steam, thus achieving circulation between the condensate and the steam.

[0009] Furthermore, the second evaporator is located at the center of the bottom of the cooking chamber, and the bottom of the cooking chamber slopes towards the second evaporator. This slope ensures that condensate from the side walls of the cooking chamber collects at the second evaporator. This achieves condensate recycling through the second evaporator, increasing the amount of steam in the cooking chamber, and reduces the amount of residual condensate inside the cooking chamber, making it easier for the user to clean.

[0010] Furthermore, the diversion system includes a drip-proof water collection box and a diversion pipe. The drip-proof water collection box is connected to the condensation system, and one end of the diversion pipe is connected to the drip-proof water collection box, while the other end abuts against the side wall of the cooking chamber. The drip-proof water collection box prevents water from the condensation system from dripping directly onto the food in the cooking chamber, thus affecting the cooking effect. It collects the water from the condensation system in the diversion pipe and ultimately diverts it to the inner wall of the cooking chamber, where it flows into the second evaporator, without affecting the cooking effect, while simultaneously increasing the steam output.

[0011] Further, the condensing system comprises a condensing box arranged on the top of the cabinet and an air duct, the top of the condensing box is provided with a cooling plate, the bottom of the condensing box is provided with an air inlet and an air outlet, the air inlet is communicated with the cooking chamber, the air outlet is communicated with the air duct, and the condensed water in the condensing box drips into the flow guide system from the air inlet. The water vapor in the cooking chamber enters the condensing box from the air inlet, forms condensed water at the top cooling plate, and finally the condensed water drips from the cooling plate to the bottom of the condensing box, and finally flows out of the air inlet and drips into the flow guide system. The excess water vapor enters the air duct from the air outlet and is discharged from the cabinet through the air duct.

[0012] Further, the condensing system further comprises a fan, the fan is connected with the cabinet, the fan air inlet is arranged on the outer surface of the cabinet, and the fan air outlet is communicated with the air duct. The fan air inlet is arranged on the outer surface of the cabinet, the fan air outlet is communicated with the air duct, and the fan blows the excess water vapor out of the cabinet along the direction of the air duct during operation, thereby reducing the residual condensed water in the cooking chamber.

[0013] Further, the water tank is communicated with the second evaporator, and a second water inlet pump is arranged between the second evaporator and the water tank. The second evaporator is communicated with the water tank, water is directly supplied to the second evaporator through the second water inlet pump, and water is supplied to the first evaporator through the first water inlet pump. Both groups of evaporators have independent water supply sources, forming an independent double-steam internal circulation system, and improving the steam quantity in the cooking chamber.

[0014] Further, the second evaporator is provided with a water inlet and a lower cavity, the water inlet is communicated with the water tank, and the lower cavity is communicated with the water inlet and the evaporation cavity. The water in the water tank enters the second evaporator through the water inlet, first reaches the lower cavity for buffering to avoid the water flow overflowing from the second evaporator due to too high flow rate, and then the water flow fills the evaporation cavity communicated with the lower cavity, gradually evaporates into steam, and participates in the food steaming and baking heating process.

[0015] Further, a drain pump is arranged between the first evaporator and the water tank. The drain pump is arranged between the first evaporator and the water tank to drain the remaining water in the first evaporator into the water tank after the first evaporator stops working, thereby avoiding the water remaining in the evaporator for a long time and affecting subsequent use.

[0016] Further, the first evaporator is communicated with the second evaporator, the height of the first evaporator is higher than the height of the second evaporator, and an electromagnetic valve is arranged between the first evaporator and the second evaporator. The connection between the first evaporator and the second evaporator is controlled by the electromagnetic valve. When the electromagnetic valve is opened, the remaining water in the first evaporator can be directly discharged into the second evaporator, and the second evaporator heats and evaporates the water into steam, thereby improving the steam quantity and avoiding water accumulation in the evaporator.

[0017] Compared with the prior art, the utility model has the beneficial effects that

[0018] 1, adopt cross double evaporate, independent double evaporate two modes, in the cooking process at least one evaporator is in working condition, greatly improve the steam quantity produced in the cooking process;

[0019] 2, through condensing system recycling steam and using again, reduce evaporator continuous work's water consumption, increase steaming time under the condition of same water tank capacity;

[0020] 3, two groups of evaporators cooperate, realize the steam inner circulation in the cooking equipment, do not remain condensate in the cooking equipment, clean more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is double evaporator inner circulation system principle schematic diagram in example one;

[0022] Figure 2 It is double evaporator inner circulation system principle schematic diagram in example two;

[0023] Figure 3 It is double evaporator inner circulation system structure schematic diagram;

[0024] Figure 4 It is condensing system structure schematic diagram;

[0025] Figure 5 It is another view condensing system structure schematic diagram;

[0026] Figure 6 It is the structure schematic diagram of guide system;

[0027] Figure 7 It is the structure schematic diagram of second evaporator;

[0028] Figure 8 It is another view of second evaporator structure schematic diagram.

[0029] In the drawings: 100, box;110, cooking chamber;200, first evaporator;300, second evaporator;310, evaporating cavity;320, first heating tube;330, water inlet;340, lower concave cavity;400, condensing system;410, condensing box;411, cooling plate;412, air inlet;413, air outlet;420, air duct;430, fan;500, guide system;510, anti-dripping water collecting box;520, guide water pipe;600, water tank;700, second heating tube. DETAILED DESCRIPTION

[0030] The utility model makes further explanation in combination with specific implementation. Among them, the drawing is only for example explanation, shows only the schematic diagram, and is not the real object drawing, and can not be understood as the limitation to this patent; in order to better explain the embodiment of the utility model, some components of the drawing can be omitted, enlarged or reduced, and do not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures and their description in the drawing can be omitted.

[0031] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if there are terms "upper", "lower", "left", "right" and the like indicating the orientation or positional relationship, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the positional relationship of the term in the drawing is only for example explanation, and can not be understood as the limitation to this patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0032] Embodiment one

[0033] The embodiment is the first embodiment of double-evaporator internal circulation system, including the box body 100 being equipped with the cooking chamber 110, the first evaporator 200 being arranged at the outside of the box body 100, the second evaporator 300 being arranged in the inside of the box body 100, the condensing system 400, the water tank 600 and the flow guide system 500 for guiding the condensed water in the condensing system 400 to the inner wall of the cooking chamber 110, the condensing system 400, the flow guide system 500 and the water tank 600 are all connected with the box body 100, the condensing system 400, the first evaporator 200 and the second evaporator 300 are all communicated with the cooking chamber 110, the water tank 600 is communicated with the first evaporator 200, and the first water inlet pump is arranged between the first evaporator 200 and the water tank 600.

[0034] As Figure 1As shown, the double-evaporator internal circulation system in the embodiment adopts a cross double-evaporation internal circulation mode. The first water inlet pump draws water in the water tank 600 into the first evaporator 200, and the water is heated and evaporated into water vapor in the first evaporator 200, which enters the cooking chamber 110. The high-temperature water vapor is used to steam and roast food, and part of it floats into the condensing system 400. The condensing system 400 condenses part of the water vapor into condensed water, and part of the excess water vapor is discharged from the box body 100. The condensed water is guided by the flow guide system 500 to the second evaporator 300 inside the cooking chamber 110, heated and evaporated into water vapor in the second evaporator 300, and participates in the steaming and roasting work in the cooking chamber 110. The double-evaporator internal circulation system in the embodiment realizes steam circulation inside the box body 100, reduces the water consumption of the evaporator during continuous operation, increases the steaming time under the same water tank 600 capacity, and increases the amount of steam generated during cooking.

[0035] The second evaporator 300 is provided with an evaporation cavity 310, and the bottom of the second evaporator 300 is provided with a first heating pipe 320. Figure 7 、 Figure 8 As shown, the second evaporator 300 in the embodiment is in the shape of an evaporation disc, and the top surface is provided with an annular evaporation cavity 310, and the bottom surface is provided with an annular first heating pipe 320. The second evaporator 300 is fixed in the cooking chamber 110 by screws. The flow guide system 500 guides the condensed water generated in the condensing system 400 to the inner wall of the cooking chamber 110. The condensed water flows along the inner wall of the cooking chamber 110 to the evaporation cavity 310 on the second evaporator 300. The first heating pipe 320 continuously works to heat the water in the evaporation cavity 310 into steam, realizing the circulation between the condensed water and the steam.

[0036] The second evaporator 300 is arranged at the bottom center of the cooking chamber 110, and the bottom of the cooking chamber 110 is inclined to the second evaporator 300. Figure 3 As shown, the second evaporator 300 in the embodiment is located at the bottom center of the cooking chamber 110 and is at the lowest point of the bottom. The bottom of the cooking chamber 110 is inclined to the second evaporator 300. A plurality of drainage grooves can be arranged between the side wall of the cooking chamber 110 and the second evaporator 300, so as to facilitate the water droplets in the flow guide assembly to flow from the side wall of the cooking chamber 110 to the bottom of the cooking chamber 110, and finally collect in the second evaporator 300 to be heated and evaporated into water vapor.

[0037] The water diversion system 500 comprises a drip-proof water collecting box 510 and a water diversion pipe 520. The drip-proof water collecting box 510 is in communication with the condensing system 400. One end of the water diversion pipe 520 is in communication with the drip-proof water collecting box 510, and the other end is in abutment with the side wall of the cooking chamber 110. The drip-proof water collecting box 510 prevents the water in the condensing system 400 from directly dripping onto the food in the cooking chamber 110, affecting the cooking effect of the food. The drip-proof water collecting box 510 collects the water in the condensing system 400 into the water diversion pipe 520, and finally drains to the inner wall of the cooking chamber 110, and then flows into the second evaporator 300, thereby increasing the amount of steam in the cooking process of the food, and reducing the residual condensed water in the cooking equipment, thereby facilitating cleaning. As shown in Figure 6 The water diversion pipe 520 and the drip-proof water collecting box 510 in the embodiment are arranged below the second heating pipe 700. The second heating pipe 700 can heat the steam in the cooking chamber 110 to provide an indirect heating effect for the food. The water diversion system 500 in the embodiment can also use a water diversion box in cooperation with the drip-proof water collecting box 510 to drain the condensed water to the side wall of the cooking chamber 110.

[0038] The condensing system 400 comprises a condensing box 410 arranged at the top of the box body 100 and an air duct 420. The condensing box 410 is provided with a cooling plate 411 at the top and an air inlet 412 and an air outlet 413 at the bottom. The air inlet 412 is in communication with the cooking chamber 110, and the air outlet 413 is in communication with the air duct 420. The condensed water in the condensing box 410 drips into the water diversion system 500 from the air inlet 412. As shown in Figure 4 , Figure 5 The water vapor in the cooking chamber 110 enters the condensing box 410 from the air inlet 412, forms condensed water at the top cooling plate 411, and finally drips to the bottom surface of the condensing box 410 and drips into the water diversion system 500 from the air inlet 412. The excess water vapor enters the air duct 420 from the air outlet 413 and is discharged from the box body 100 through the air duct 420. The condensing box 410 in the embodiment can also be provided with a condensed water pipe arranged above the cooling plate 411. The two ends of the condensed water pipe are in communication with the water tank 600. The water flowing in the condensed water pipe provides a water cooling effect for the high-temperature steam in the condensing box 410, so that the cooling plate 411 always maintains a lower temperature, thereby improving the steam condensing efficiency. As shown in Figure 3 , Figure 4 The air inlet of the air duct 420 is in communication with the air outlet 413 of the condensing box 410, and the air outlet of the air duct 420 is arranged on the front surface of the box body 100. The high-temperature steam in the cooking chamber 110 enters the condensing system 400, part of which forms condensed water for recycling, and part of which becomes low-temperature steam and enters the air duct from the air outlet 413 of the condensing box 410, and is finally discharged from the front surface of the box body 100.

[0039] The condensing system 400 further comprises a fan 430 connected with the cabinet 100, an air inlet of the fan 430 is arranged on the outer surface of the cabinet 100, and an air outlet of the fan 430 is communicated with the air duct 420. As shown in Figure 4 、 Figure 5 the air inlet of the fan 430 is arranged on the outer surface of the cabinet 100, and the air outlet of the fan 430 is communicated with the air duct 420, so that the excess water vapor is blown out of the cabinet 100 along the direction of the air duct 420, and the residual condensed water in the cooking chamber 110 is reduced. The fan 430 in the embodiment can be a cross-flow fan, which is driven by a motor to rotate a multi-blade impeller to provide airflow into the air duct 420, and the airflow is stable. The excess steam cooled in the condensing system 400 is discharged out of the cabinet 100, the residual condensed water in the cabinet 100 is reduced, and the user is prevented from being scalded by high-temperature steam.

[0040] The working principle of the double-evaporator internal circulation system in the embodiment is as follows: a cross double-evaporation internal circulation mode is adopted. First, water is added to the first evaporator 200 through the water tank 600, the first evaporator 200 starts to work, the evaporated steam enters the cooking chamber 110, and the steam heats the food in the cooking chamber 110. At the same time, part of the steam enters the condensing system 400, the condensing system 400 changes the steam into condensed water, the flow guide system 500 guides the condensed water to the second evaporator 300, and the second evaporator 300 works to reheat the condensed water into steam to participate in the heating process of the food in the cooking chamber 110.

[0041] Embodiment Two

[0042] The second embodiment of the double-evaporator internal circulation system is similar to the first embodiment, except that the water tank 600 is communicated with the second evaporator 300, and a second water inlet pump is arranged between the second evaporator 300 and the water tank 600. As shown in Figure 2 the double-evaporator internal circulation system in the embodiment adopts an independent double-evaporation internal circulation mode, that is, the first evaporator 200 and the second evaporator 300 each have an independent water supply system. The water tank 600 directly supplies water to the second evaporator 300 through the second water inlet pump, and supplies water to the first evaporator 200 through the first water inlet pump. The two groups of evaporators each have an independent water supply source, forming an independent double-evaporation internal circulation system. During cooking, at least one group of evaporators is in a working state, and the amount of steam in the cooking chamber 110 is increased.

[0043] The second evaporator 300 is provided with a water inlet 330 and a lower recessed cavity 340. The water inlet 330 is communicated with the water tank 600, and the lower recessed cavity 340 is communicated with the water inlet 330 and the evaporation cavity 310. As shown in Figure 7 、 Figure 8As shown, the lower concave cavity 340 is arranged between the water inlet 330 and the evaporation cavity 310, and the water in the water tank 600 enters the second evaporator 300 through the water inlet 330, first reaches the lower concave cavity 340 for buffering, so as to avoid the water flow overflowing from the second evaporator 300 due to too high flow rate, and then the water flow gradually fills the evaporation cavity 310 communicated with the lower concave cavity 340, and is evaporated into steam to participate in the food steaming and baking heating process.

[0044] A drain pump is arranged between the first evaporator 200 and the water tank 600. The drain pump drains the remaining water flow in the first evaporator 200 into the water tank 600, so as to avoid the water flow staying in the first evaporator 200 for a long time to breed bacteria, and improve the hygiene degree in the steam cooking process.

[0045] The working principle of the double-evaporator internal circulation system in the embodiment is as follows: the double-evaporator internal circulation system in the embodiment adopts an independent double-evaporator internal circulation mode, that is, the first evaporator 200 and the second evaporator 300 each have an independent water supply system, the water tank 600 directly supplies water to the second evaporator 300 through the second water pump and supplies water to the first evaporator 200 through the first water pump, and the two groups of evaporators each have an independent water supply source.

[0046] Embodiment three

[0047] The third embodiment of the double-evaporator internal circulation system is similar to the second embodiment, and the difference lies in that the first evaporator 200 and the second evaporator 300 are communicated, the height of the first evaporator 200 is higher than the height of the second evaporator 300, and an electromagnetic valve is arranged between the first evaporator 200 and the second evaporator 300. The height of the first evaporator 200 is set to be higher than the height of the second evaporator 300, the communication between the first evaporator 200 and the second evaporator 300 is controlled through the electromagnetic valve, the remaining water in the first evaporator 200 is drained into the second evaporator 300, and no additional drain pump is needed, which is convenient for cleaning.

[0048] The working principle of the double-evaporator internal circulation system in the embodiment is as follows: the height of the first evaporator 200 is set to be higher than the height of the second evaporator 300, and the remaining water in the first evaporator 200 is drained into the second evaporator 300 through the electromagnetic valve.

[0049] In the specific contents of the above specific embodiments, any non-contradictory combination of technical features can be made, and in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of the technical features does not exist, it should be considered as the scope disclosed in the specification.

[0050] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A dual evaporator internal circulation system, characterized by, The application relates to a cooking device, which comprises a box body (100) provided with a cooking chamber (110), a first evaporator (200) arranged outside the box body (100), a second evaporator (300) arranged inside the box body (100), a condensing system (400), a water guiding system (500) for guiding condensate water in the condensing system (400) to the inner wall of the cooking chamber (110), and a water tank (600), wherein the condensing system (400), the water guiding system (500) and the water tank (600) are connected with the box body (100), the condensing system (400), the first evaporator (200) and the second evaporator (300) are communicated with the cooking chamber (110), the water tank (600) is communicated with the first evaporator (200), and a first water inlet pump is arranged between the first evaporator (200) and the water tank (600).

2. A dual evaporator internal circulation system according to claim 1, wherein, The second evaporator (300) is provided with an evaporation cavity (310) at the top, and a first heating pipe (320) at the bottom.

3. A dual evaporator internal circulation system according to claim 1, wherein, The second evaporator (300) is arranged at the bottom center of the cooking chamber (110), and the bottom of the cooking chamber (110) is inclined to the second evaporator (300).

4. A dual evaporator internal circulation system according to claim 1, wherein, The water guiding system (500) comprises a drip-proof water collecting box (510) and a water guiding pipe (520), the drip-proof water collecting box (510) is communicated with the condensing system (400), one end of the water guiding pipe (520) is communicated with the drip-proof water collecting box (510), and the other end is abutted with the side wall of the cooking chamber (110).

5. A dual evaporator internal circulation system according to claim 1 wherein, The condensing system (400) comprises a condensing box (410) arranged at the top of the box body (100) and an air duct (420), the condensing box (410) is provided with a cooling plate (411) at the top, an air inlet (412) and an air outlet (413) at the bottom, the air inlet (412) is communicated with the cooking chamber (110), the air outlet (413) is communicated with the air duct (420), and the condensate water in the condensing box (410) drops from the air inlet (412) to the water guiding system (500).

6. A dual evaporator internal circulation system according to claim 5, wherein, The condensing system (400) further comprises a fan (430), the fan (430) is connected with the box body (100), the air inlet of the fan (430) is arranged on the outer surface of the box body (100), and the air outlet of the fan (430) is communicated with the air duct (420).

7. A dual evaporator internal circulation system according to any one of claims 1 to 6, wherein The water tank (600) is communicated with the second evaporator (300), and a second water inlet pump is arranged between the second evaporator (300) and the water tank (600).

8. A dual evaporator internal circulation system according to claim 2, wherein, The second evaporator (300) is provided with a water inlet (330) and a lower concave cavity (340), the water inlet (330) is communicated with the water tank (600), and the lower concave cavity (340) is communicated with the water inlet (330) and the evaporation cavity (310).

9. A dual evaporator internal circulation system according to claim 7, wherein, A drainage pump is arranged between the first evaporator (200) and the water tank (600).

10. A dual evaporator internal circulation system according to claim 7, wherein, The first evaporator (200) is communicated with the second evaporator (300), the height of the first evaporator (200) is higher than the height of the second evaporator (300), and a solenoid valve is arranged between the first evaporator (200) and the second evaporator (300).

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