CN211269994U

CN211269994U - High-efficiency energy-saving steaming table

Info

Publication number: CN211269994U
Application number: CN201922353306.6U
Authority: CN
Inventors: 张荣宽
Original assignee: Kuateli Food Machinery Zhangzhou Co ltd
Current assignee: Kuateli Food Machinery Zhangzhou Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-08-18
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to a kitchen utensil field, more specifically say, it relates to a high efficiency energy-saving evaporates platform, and its technical scheme main points are: including evaporating the platform box, being located and evaporating the heating cabinet in the platform box and being located the heating stove of heating cabinet below, the heating cabinet bottom indent that makes progress is provided with the heated groove, the indent is provided with the exhaust gas collecting vat on the heated groove top, is located the heated groove top be provided with at least a set of coil pipe in the heating cabinet, coil pipe and exhaust gas collecting vat intercommunication, the exhaust outlet of coil pipe is connected with the air convection device. The utility model discloses a high-efficient energy-conserving platform that evaporates improves steam volume and steam temperature, has avoided the direct emission of high temperature waste gas, causes the waste of energy.

Description

High-efficiency energy-saving steaming table

Technical Field

The utility model belongs to the technical field of the kitchen utensil and specifically relates to an energy-efficient platform that evaporates is related to.

Background

The steaming platform is modern cooking equipment, and original nutritional ingredients of food can be reserved in the cooking process by using a dynamic steam balance technology. The bottom of the prior steaming platform is provided with a water boiler, a heating stove is arranged below the water boiler, and the bottom of the water boiler upwards forms an inwards concave inner groove, so that the contact area of combustion can be increased, and the heating and heat absorption effects are better; moreover, if the heating area of the boiled water is increased and the heat conduction in the water is accelerated, the ratio of the contact amount of the boiled water and the heating area can be increased, so that the efficiency of the heat conduction cycle can be improved.

In order to solve the above problems, the inventor applies for an improved steam heating structure with the publication number CN204213888U, and the technical scheme thereof mainly includes a heated tank, the heated tank is internally provided with a closed hollow accommodating upper tank, and the bottom of the accommodating upper tank extends downwards to form a hollow accommodating bottom tank, so that a heating space is formed at the outer bottom of the heated tank, the accommodating upper tank is communicated with the accommodating bottom tank, and the accommodating bottom tank extends downwards from two sides of the bottom of the accommodating upper tank respectively, so that the heating space forms an open space in the shape of a "u"; a plurality of heated tubes are arranged in the heating space; the two ends of the heated tube are obliquely arranged with the inner side surface of the containing bottom groove and are respectively communicated with the containing bottom groove.

According to the technical scheme, the heating area of boiling water is increased through the heating pipe, so that the efficiency of heat conduction circulation is improved, but the waste gas generated by combustion in the heating groove is directly discharged to the outside of the steam box, and the discharged waste gas is in a high-temperature state, so that the energy is wasted.

Accordingly, the inventors have further developed the steaming station described above to overcome the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-efficient energy-saving evaporates platform, has make full use of heat energy, reaches the advantage of energy saving to prior art exists not enoughly.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an energy-efficient platform that evaporates, includes to evaporate a box, is located to evaporate the heating cabinet in the box and is located the heating stove of heating cabinet below, the heating cabinet bottom indent that makes progress is provided with the heated groove, the indent is provided with the exhaust gas collecting vat on the heated groove top, is located the heated groove top be provided with at least a set of coil pipe in the heating cabinet, coil pipe and exhaust gas collecting vat intercommunication, the exhaust outlet of coil pipe is connected with the air convection device.

Through adopting above-mentioned technical scheme, the flame of heating stove is arranged in the heated groove, heat the heating cabinet, thereby improve the heating area of heating cabinet, and be arranged in the waste gas collecting vat that produces in the heated groove and get into the top, the coil pipe that communicates with the waste gas collecting vat is under the effect of air convection device, discharge waste gas, and the coil pipe is arranged in the heating cabinet, waste gas is at coil pipe exhaust in-process, water in the heating cabinet carries out abundant absorption utilization to the heat in the coil pipe, thereby further improve the heating area of heating cabinet, thereby improve steam volume and steam temperature, high temperature waste gas direct emission has been avoided, cause the waste of energy.

The utility model discloses further set up to: the air convection device is an exhaust fan, the side wall of the steaming table box body is provided with an air outlet channel communicated with the side wall of the heating box, the waste gas outlet of the coil pipe is communicated with the air outlet channel, and the exhaust fan is installed at one end, far away from the waste gas outlet of the coil pipe, of the air outlet channel.

Through adopting above-mentioned technical scheme, the air exhauster is easy to assemble, can concentrate exhaust gas through the passageway energy of giving vent to anger and air exhauster.

The utility model discloses further set up to: the coil pipe is arranged in a mosquito-repellent incense shape, and one end of the coil pipe located in the middle is communicated with the waste gas collecting tank.

Through adopting above-mentioned technical scheme, the coil pipe that the mosquito-repellent incense shape was arranged and is set up absorbs through the water that makes the heat energy of waste gas abundant in the heating case to reduce the thermal discharge of waste gas, the energy saving.

The utility model discloses further set up to: the coil pipes are arranged in a snake shape.

Through adopting above-mentioned technical scheme, the coil pipe that the snakelike shape was arranged and is set up absorbs through the water that makes the abundant quilt of the heat energy of waste gas in the heating cabinet to reduce the thermal discharge of waste gas, the energy saving.

The utility model discloses further set up to: the middle position of the coil pipe is communicated with two opposite groove walls of the waste gas collecting groove, and waste gas outlets at two ends of the coil pipe are positioned at the same side.

Through adopting above-mentioned technical scheme, the waste gas in the waste gas collecting vat can be even enter into the coil pipe from two cell walls to further improve the utilization ratio of waste gas heat energy in the coil pipe.

The utility model discloses further set up to: the waste gas inlet end of one side of the coil pipe is communicated with the waste gas collecting tank, and the waste gas inlet end of the coil pipe is far away from the waste gas outlet end of the coil pipe.

Through adopting above-mentioned technical scheme, the waste gas collecting vat is connected with the waste gas entrance point of coil pipe to increase the time of waste gas in the coil pipe, thereby improve the thermal utilization ratio of waste gas.

The utility model discloses further set up to: the coil pipe is square pipe or pipe, the department of buckling of square pipe right angle sets up, the department of buckling of pipe is the fillet setting.

By adopting the technical scheme, the square tube or the round tube is selected for the coil pipe, so that materials can be conveniently processed and taken.

The utility model discloses further set up to: the heating cabinet includes first heating cabinet and second heating cabinet, the bottom of second heating cabinet and the top intercommunication of first heating cabinet, the heated bath upwards the indent from first heating cabinet bottom extends to the top, the exhaust gas collecting vat extends to in the second heating cabinet, the coil pipe is located the second heating cabinet, first heating cabinet upside and heated bath upside all are the setting of terrace with edge form, just the osculum in heated bath is located the vertical fixed support board of first heating cabinet both sides lateral wall in the upper end, the fixed lower surface that sets up at the second heating cabinet in backup pad upper end.

Through adopting above-mentioned technical scheme, first heating cabinet all is the terrace with edge form setting with being heated the groove upside, makes things convenient for waste gas leading-in to the exhaust gas collecting vat in, increases the heating area of heating cabinet normal water simultaneously, and makes heat-conduction accelerate in the water, thereby improves the efficiency of heat-conduction circulation, thereby makes the water in the first heating cabinet boil fast, and in entering into the second heating cabinet, then heats through the coil pipe in the second heating cabinet once more, thereby improves steam volume and steam temperature.

The utility model discloses further set up to: and at least one pressure reduction return pipe is communicated between the bottom of the second heating box and the lower side of the first heating box.

Through adopting above-mentioned technical scheme, the boiling is heated to the water in the first heating cabinet to produce pressure, water in the first heating cabinet under the pressure effect, enter into the second heating cabinet easily, thereby lead to first heating cabinet to burn futilely, through the decompression back flow, make the water in the second heating cabinet flow back to and heat in the first heating cabinet, thereby avoid the phenomenon that first heating cabinet burns futilely.

The utility model discloses further set up to: the steam table box comprises a second heating box body, wherein an opening is formed in the upper portion of the second heating box body, a pressurizing plate is fixed at the opening of the second heating box body, a three-way joint communicated with the inside of the second heating box body is connected to the pressurizing plate, two steam holes are formed in the upper surface of the steam table box body, two joints of the three-way joint are respectively connected with the two steam holes, the two steam holes can be connected with an outer connecting pipe, and a ball valve is arranged on the outer connecting pipe.

Through adopting above-mentioned technical scheme, the food steamer can be placed to two steam holes of steam ager box upper surface, perhaps uses on carrying other equipment with steam through the external pipe to improve the usability of steaming the platform.

To sum up, the utility model discloses following beneficial effect has:

firstly, the flame of a heating furnace is positioned in a heated groove to heat a heating box, so that the heated area of the heating box is increased, waste gas generated in the heated groove enters an upper waste gas collecting groove, a coil pipe communicated with the waste gas collecting groove discharges the waste gas under the action of an air convection device, the coil pipe is positioned in the heating box, and in the process of discharging the waste gas from the coil pipe, water in the heating box fully absorbs and utilizes the heat in the coil pipe, so that the heated area of the heating box is further increased, the steam quantity and the steam temperature are increased, and the energy is saved;

its two, first heating cabinet all is the terrace with edge form setting with being heated the groove upside, makes things convenient for waste gas to channel into in the exhaust gas collecting vat, increases the heating area of heating cabinet normal water simultaneously to make heat-conduction accelerate in the water, thereby improve heat-conduction endless efficiency, thereby make the water in the first heating cabinet boil fast, and enter into the second heating cabinet, then heat through the coil pipe in the second heating cabinet once more, thereby further improve steam volume and steam temperature.

Third, the boiling is heated to the water in the first heating cabinet to produce pressure, water in the first heating cabinet is under the pressure effect, enters into the second heating cabinet easily, thereby leads to first heating cabinet to burn futilely, through the decompression back flow, makes the water in the second heating cabinet flow back to and heats in the first heating cabinet, thereby avoids the phenomenon that first heating cabinet burns futilely.

Drawings

FIG. 1 is a schematic view of the steaming table of the present embodiment showing the internal structure thereof vertically cut;

FIG. 2 is an exploded view of the steaming platform, heating box and pressurizing plate in this embodiment;

FIG. 3 is a schematic view of the overall structure of the steaming table in this embodiment;

FIG. 4 is a schematic diagram of the coil and exhaust collection tank configuration in other embodiments;

FIG. 5 is a schematic diagram of the coil and exhaust collection tank configuration in other embodiments;

FIG. 6 is a schematic diagram of the coil and the exhaust collection tank in other embodiments.

In the figure: 1. a steaming platform box body; 11. supporting legs; 12. a convex edge block; 13. heating a furnace; 14. a steam vent; 15. an external connection pipe; 16. a ball valve; 17. an overflow trough; 18. an exhaust fan; 19. an air outlet channel; 2. a heating box; 21. a first heating tank; 22. a second heating chamber; 221. a pressurizing plate; 222. a reinforcing bar; 223. a three-way joint; 224. a safety valve; 23. a heated tank; 24. an exhaust gas collection tank; 25. a heated tube; 26. a support plate; 27. a pressure reducing return pipe; 28. a first drain pipe; 281. a first valve; 29. closing the plate; 3. a coil pipe; 4. a water tank; 41. a water feeding pipe; 42. a pressure reducing tube; 43. a liquid level meter; 44. a water inlet pipe; 45. a pressure reducing valve; 46. a second drain pipe; 461. a second ball valve; 47. a non-water sensor; 48. a buzzer.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

An energy-efficient steaming platform, as shown in fig. 1 and fig. 2, comprises a steaming platform box 1, a heating box 2 located in the steaming platform box 1, a heating stove 13 located below the heating box 2, and a water tank 4 located on the side wall of the steaming platform box 1, wherein supporting legs 11 are mounted at each corner of the bottom of the steaming platform box 1, and the heating stove 13 in this embodiment is a gas stove. The inside circumference of steaming platform box 1 upside is fixed and is provided with annular chimb and takes piece 12, and the outside protruding setting in 2 upside circumference edges of heating cabinet, heating cabinet 2 are installed on the chimb and take piece 12 in steaming platform box 1, and both sides and the equal vertical shrouding 29 that is provided with in 2 bottoms of heating cabinet and the steaming platform box 1 between bottom 1. The heating box 2 bottom indent upwards is provided with heated groove 23, and the indent upwards is provided with exhaust gas collecting groove 24 on the 23 groove tops of heated groove, is provided with at least a set of coil pipe 3 in the heating box 2 that is located heated groove 23 top, and coil pipe 3 and exhaust gas collecting groove 24 intercommunication, the exhaust outlet of coil pipe 3 are connected with air convection device. The flame of heating furnace utensil 13 is arranged in heated groove 23, heat heating cabinet 2, thereby improve the heating area of heating cabinet 2, and be arranged in the waste gas collecting groove 24 of the waste gas entering top that produces in heated groove 23, coil pipe 3 with the effect of waste gas collecting groove 24 intercommunication is under the air convection device, discharge waste gas, and coil pipe 3 is arranged in heating cabinet 2, waste gas is at coil pipe 3 exhaust in-process, water in the heating cabinet 2 carries out the abundant absorption utilization to the heat in coil pipe 3, thereby further improve the heating area of heating cabinet 2, thereby increase steam flow and steam temperature, high temperature waste gas direct emission has been avoided, cause the waste of energy.

Specifically, as shown in fig. 1, the heating box 2 includes a first heating box 21 and a second heating box 22, the first heating box 21 has a smaller volume than the second heating box 22, the bottom of the second heating box 22 is communicated with the top of the first heating box 21, the heated tank 23 extends from the bottom of the first heating box 21 to the top in an upward concave manner, the exhaust gas collecting tank 24 extends into the second heating box 22, and the coil 3 is located in the second heating box 22. Preferably, the coil pipes 3 in the embodiment are arranged in four groups, and the four groups of coil pipes 3 are arranged at intervals up and down. First heating cabinet 21 upside and receive hot groove 23 upside and all be the setting of terrace with edge form, and the osculum that receives hot groove 23 is in the upper end, the groove 23 that is heated through the upside slope makes things convenient for waste gas to leading-in to the exhaust gas collecting vat 24, first heating cabinet 21 upside slope sets up simultaneously, increase the heated area of 2 normal waters in the heating cabinet, and make heat-conduction accelerate in the water, thereby improve heat-conduction endless efficiency, thereby make the water in the first heating cabinet 21 boil fast, and enter into in the second heating cabinet 22, then heat through coil pipe 3 in the second heating cabinet 22 once more, thereby improve steam volume and steam temperature.

As shown in fig. 1 and 2, two groups of heated tubes 25 communicated with the first heating box 21 are vertically arranged on the lower side of the heated tank 23 opposite to the two tank walls, a plurality of the two groups of heated tubes 25 are horizontally arranged at intervals, and the two groups of heated tubes 25 are vertically arranged, so that the heated area of the first heating box 21 is increased. The supporting plates 26 are vertically fixed on the side walls of the two sides of the first heating box 21, and the upper ends of the supporting plates 26 are fixedly arranged on the lower surface of the second heating box 22, so that the second heating box 22 is reinforced. At least one decompression return pipe 27 is communicated between the bottom of the second heating box 22 and the lower side wall of the first heating box 21. In this embodiment, three pressure reducing return pipes 27 are provided on the peripheral side wall of the first heating chamber 21. The water in the first heating box 21 is heated and boiled to generate pressure, the water in the first heating box 21 is easy to enter the second heating box 22 under the action of the pressure, so that the first heating box 21 is burnt without air, and the water in the second heating box 22 is returned to the first heating box 21 for heating through the decompression return pipe 27, so that the phenomenon that the first heating box 21 is burnt without air is avoided. The bottom of the first heating box 21 is communicated with a first drainage pipe 28 extending out of the box body of the steam box, and a first valve 281 is arranged on the first drainage pipe 28.

As shown in fig. 1 and 2, the second heating box 22 is provided with an opening at the upper part, a pressure plate 221 is fixed at the opening of the second heating box 22, and a plurality of reinforcing rods 222 are fixed on the upper surface of the pressure plate 221 at intervals. The pressurizing plate 221 is connected with a three-way joint 223 communicated with the inside of the second heating box 22, the upper surface of the steaming table box body 1 is provided with two steam holes 14, two joints of the three-way joint 223 are respectively connected with the two steam holes 14, the two steam holes 14 can be connected with an external connecting pipe 15, and the external connecting pipe 15 is provided with a ball valve 16. Two steam holes 14 on the upper surface of the steaming table box body 1 can be used for placing a food steamer, an external connecting pipe 15 can also be used for conveying steam to other equipment through the external connecting pipe 15 for use, and overflow grooves 17 are formed in the peripheral edge of the upper surface of the steaming table box body 1.

As shown in fig. 1 and 3, the water tank 4 is lower than the heating tank 2 and higher than the coil 3. A water feeding pipe 41 is communicated between the lower side wall of the water tank 4 and the lower side wall of the heating box 2, and a pressure reducing pipe 42 is communicated between the upper side wall of the water tank 4 and the upper side wall of the heating box 2. A liquid level meter 43 is vertically arranged on the side wall of the water tank 4. The side wall of the upper side of the water tank 4 is provided with a water inlet pipe 44, and the water inlet pipe 44 is provided with a pressure reducing valve 45. The bottom of the water tank 4 is provided with a second water outlet pipe 46, and the second water outlet pipe 46 is provided with a second ball valve 46116. The lateral wall of the water tank 4 is provided with a waterless sensor 47 extending to the inside, the lateral wall of the steaming platform box body 1 is provided with a buzzer 48, and when the waterless sensor 47 detects that the water in the water tank 4 is waterless, the alarm is given out through the buzzer 48. The side wall of the steaming platform box body 1 is provided with a safety valve 224 communicated with the upper side of the heating box 2.

As shown in fig. 2 and fig. 3, specifically, the air convection device in this embodiment is an exhaust fan 18, an air outlet channel 19 communicated with the side wall of the heating box 2 is arranged on the side wall of the steaming table box 1, a waste gas outlet of the coil pipe 3 is communicated with the air outlet channel 19, the exhaust fan 18 is installed at one end of the air outlet channel 19 far away from the waste gas outlet of the coil pipe 3, the exhaust fan 18 is convenient to install, and waste gas in the coil pipe 3 can be intensively exhausted through the air outlet channel 19 and the exhaust fan 18.

As shown in fig. 2, the coil 3 in this embodiment is arranged in a serpentine shape. The coil pipes 3 arranged in the shape of a snake can enable the heat energy of the waste gas to be fully absorbed by the water in the heating box 2, thereby reducing the discharge of the heat energy of the waste gas and saving the energy. The coil pipe 3 in this embodiment adopts square pipe, and the department of buckling right angle setting of square pipe. The middle position of the coil pipe 3 is communicated with two opposite groove walls of the waste gas collecting groove 24, and waste gas outlets at two ends of the coil pipe 3 are positioned at the same side. The waste gas in the waste gas collecting groove 24 can uniformly enter the coil 3 from two groove walls, so that the utilization rate of the heat energy of the waste gas in the coil 3 is further improved.

As shown in fig. 4, in other embodiments, the coils 3 may also be arranged in a mosquito coil shape, one end of the coil 3 located at the middle position is communicated with the exhaust gas collecting tank 24, and the exhaust gas inlet ends of two adjacent coils 3 are connected to two opposite walls of the exhaust gas collecting tank 24. In other embodiments, as shown in fig. 5, the coil 3 may be a round tube, and the bend of the round tube is a round angle.

As shown in fig. 6, in other embodiments, the exhaust gas inlet end of one side of the coil 3 is communicated with the exhaust gas collecting tank 24, the exhaust gas collecting tank 24 is located at one side of the heating box 2, the exhaust gas inlet end of the coil 3 is far away from the exhaust gas outlet end of the coil 3, and the exhaust gas inlet ends of two adjacent upper and lower groups of coils 3 are connected to two opposite groove walls of the exhaust gas collecting tank 24. An exhaust gas collection tank 24 is connected to the exhaust gas inlet end of the coil 3 to increase the time of exhaust gas in the coil 3 and thus improve the heat utilization of the exhaust gas.

The working process and principle are as follows: the flame of heating stove 13 is arranged in heated groove 23, heat heating cabinet 2, heated groove 23 through the upside slope makes things convenient for waste gas to channel into exhaust gas collecting groove 24, first heating cabinet 21 upside slope sets up simultaneously, increase the heated area of 2 normal waters in the heating cabinet, and make heat-conduction accelerate in the water, thereby improve heat-conduction endless efficiency, thereby make the water in the first heating cabinet 21 boil fast, and enter into in the second heating cabinet 22, then heat through coil pipe 3 in the second heating cabinet 22 once more, thereby improve steam volume and steam temperature, high temperature waste gas direct discharge has been avoided, cause the waste of energy.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a high-efficient energy-conserving platform that evaporates which characterized in that: including steaming a platform box (1), be located heating cabinet (2) of steaming a platform box (1) and be located heating furnace (13) of heating cabinet (2) below, the indent upwards is provided with heated groove (23) heating cabinet (2) bottom, the indent upwards is provided with exhaust gas collection groove (24) on heated groove (23) groove top, is located heated groove (23) top be provided with at least a set of coil pipe (3) in heating cabinet (2), coil pipe (3) and exhaust gas collection groove (24) intercommunication, the exhaust outlet of coil pipe (3) is connected with the air convection device.

2. An energy-efficient steaming platform according to claim 1, wherein: the air convection device is air exhauster (18), evaporate a set box body (1) lateral wall and be provided with air outlet channel (19) with heating cabinet (2) lateral wall intercommunication, the exhaust outlet and air outlet channel (19) intercommunication of coil pipe (3), air exhauster (18) are installed and are kept away from the one end of the exhaust outlet of coil pipe (3) in air outlet channel (19).

3. An energy-efficient steaming platform according to claim 1, wherein: the coil pipe (3) is arranged in a mosquito-repellent incense shape, and one end of the coil pipe (3) located in the middle is communicated with the waste gas collecting tank (24).

4. An energy-efficient steaming platform according to claim 1, wherein: the coil pipes (3) are arranged in a snake shape.

5. An energy-efficient steaming platform according to claim 4, wherein: the middle position of the coil pipe (3) is communicated with two opposite groove walls of the waste gas collecting groove (24), and waste gas outlets at two ends of the coil pipe (3) are positioned at the same side.

6. An energy-efficient steaming platform according to claim 4, wherein: the waste gas inlet end of one side of the coil pipe (3) is communicated with the waste gas collecting groove (24), and the waste gas inlet end of the coil pipe (3) is far away from the waste gas outlet end of the coil pipe (3).

7. An energy-efficient steaming platform according to claim 4, wherein: the coil pipe (3) is a square pipe or a round pipe, the bending part of the square pipe is arranged at a right angle, and the bending part of the round pipe is arranged at a round angle.

8. An energy-efficient steaming platform according to any one of claims 1 to 7, wherein: heating cabinet (2) include first heating cabinet (21) and second heating cabinet (22), the bottom of second heating cabinet (22) and the top intercommunication of first heating cabinet (21), it upwards extends to the top to indent from first heating cabinet (21) bottom to receive hot groove (23), waste gas collecting vat (24) extend to in second heating cabinet (22), coil pipe (3) are located second heating cabinet (22), first heating cabinet (21) upside and receive hot groove (23) upside all are the setting of terrace with edge form, just the osculum of receiving hot groove (23) is located the vertical fixed support board (26) of first heating cabinet (21) both sides lateral wall in the upper end, fixed setting is in the lower surface of second heating cabinet (22) in backup pad (26) upper end.

9. An energy-efficient steaming platform according to claim 8, wherein: at least one decompression return pipe (27) is communicated between the bottom of the second heating box (22) and the lower side of the first heating box (21).

10. An energy-efficient steaming platform according to claim 8, wherein: the utility model discloses a steam table, including steam table box (1), second heating case (22) upper portion opening part is fixed with increased pressure board (221), be connected with three way connection (223) with the inside intercommunication of second heating case (22) on increased pressure board (221), two steam holes (14) have been seted up to steam table box (1) upper surface, wherein two of three way connection (223) connect respectively with two steam holes (14) to two steam holes (14) can be connected outer takeover (15), are provided with ball valve (16) on outer takeover (15).