CN206390810U - Western-style province's deep fryer with automatic detection liquid level and prompting oiling function - Google Patents

Abstract

The utility model discloses a kind of Western-style province's deep fryer with automatic detection liquid level and prompting oiling function, it is related to a kind of electric power and complained and quarrel loudly.Multiple fryer oil grooves are installed in outer case, band rotating shaft is mounted in each fryer oil groove can go up rotation immersion heater component, the surface of outer case is provided with the micro computer control panel for controlling respective specific pot cooking status, the low oil level indicator lamp for indicating filling oil mass demand is provided with micro computer control panel, door is hinged with outer case, door is opened to provide the path of built-in shortening filter cart, and for periodicmaintenance necessary to this fryer cooking system；High level temperature sensor and low liquid level temperature sensor are installed, high level temperature sensor and low liquid level temperature sensor are electrically connected with micro computer control panel in the fryer oil groove.The utility model has automatic detection liquid level and reminds the ability of filling oil mass, and can extend culinary art life of oil, saves oil mass, fried culinary art effect is good, convenient for cleaning.

Description

Western-style province's deep fryer with automatic detection liquid level and prompting oiling function

Technical field

The present invention relates to a kind of electric power fryer, and in particular to a kind of fuel economy configuration, with automatic detection liquid level and It is automatically reminded to fill oily ability the electric power to extend culinary art life of oil to complain and quarrel loudly.

Background technology

Electric power deep fryer used in business culinary art industry allows for quick heating cooking oil and cooks a large amount of food To meet the demand of customer, the oil groove of deep fryer must maintain the oil mass of enough depth and sufficient amount to cook expected food Amount, in addition, cooking oil must be reduced as far as residue to extend its service life in cooking process.In addition, businessman is necessary Expect to be balanced between the high cost and fryer maintenance problem of cooking oil in the demand of customer.

During processing is fried, because substantial amounts of cooking oil is absorbed by food, the reduction of oil mass is caused to make to fry Oily depth reduction in pot oil groove, oil mass not enough causes the food after frying to reach the demand of customer when causing to fry food Expect.If fryer can not maintain cooking oil most suitable liquid level and most suitable temperature, operator may when frying food Can not know oil mass if appropriate for and produce quality dissatisfaction and potentially unsafe food.

Except keeping fryer to be filled into most suitable liquid level, cooking oil must also be produced best food by appropriate filtering Product, due to continuously using, have many residues, it is therefore desirable to extend not after repeatedly frying circulation in remaining cooking oil The cooking oil that the life-span that can be used by the cooking oil that food absorbs and making during processing is fried is not absorbed by food Keep cleaning.

Most suitable fryer oil groove size must guarantee to be used to preserve oil, and integral device integrality can be kept again, though Right existing exploitation has the electric power fryer oil groove of a variety of designs to improve integrated cooking efficiency and service life, but still has Defect is present.If some pots are it is necessary to have larger cold oil volume, many such fryer oil grooves because its is such and Size reason and need substantial amounts of cooking oil.

It is fried culinary art that general frying device, which includes being provided with opposite on fixed electric heater, electric heater in oil groove, oil groove, Region, electric heater heats the cooking oil in oil groove, and food is fried for processing.Using after a period of time, it is necessary to fryer Oil groove carries out cleaning, but because the installation of electric heater is fixed, the cleaning of fryer oil groove is got up very inconvenient, Electric heater in oil groove blocks the cleaning of some spaces of oil groove.

In order to solve the above problems, it is necessary to which designing a kind of provide automatic detection liquid level and can remind and be filled into most suitable liquid Position is complained and quarrel loudly come the electric power for keeping the fuel economy for expecting culinary art oil level to complain and quarrel loudly, and is provided a kind of heater and can be screwed out fryer oil groove Space is convenient for cleaning and does not influence heater to return in oil groove the fryer equipment for continuing to heat.

The content of the invention

In view of the shortcomings of the prior art, the present invention seeks to be that providing one kind has automatic detection liquid level and carry The Western-style province's deep fryer for oiling function of waking up, reasonable in design, the ability with automatic detection liquid level and prompting filling oil mass, and Culinary art life of oil can be extended, oil mass is saved, fried culinary art effect is good, convenient for cleaning, practical, it is easy to promote the use of.

To achieve these goals, the present invention is to realize by the following technical solutions：With automatic detection liquid level and Remind Western-style province's deep fryer of oiling function, including outer case, fryer oil groove, heater assembly, micro computer control panel and filter 1-8 fryer oil groove is installed, each fryer oil groove contains cooks commonly using in industry for fried business in oily car, outer case It is mounted on that the heater assembly of rotation immersion can be gone up with rotating shaft in the oil of food, each fryer oil groove, is cooked for heating oil tank The cooking oil prepared food in region, the surface of outer case be provided with each fryer oil groove it is special, for controlling respective specific pot culinary art It is provided with the micro computer control panel of state, micro computer control panel for indicating that the low oil level of filling oil mass demand is indicated Door is hinged with lamp, outer case, door is opened to provide the path of built-in shortening filter cart, and for necessary to this fryer cooking system Periodicmaintenance；High level temperature sensor and low liquid level temperature sensor, high level temperature are installed in the fryer oil groove Sensor and low liquid level temperature sensor are electrically connected with micro computer control panel.

Preferably, described each fryer oil groove is respectively provided with identical element and function, fryer oil groove inwall is provided with Oil-in is filled, fryer oil groove bottom is provided with scrap collecting area, and fryer oil groove bottom is also equipped with a pair of fuel outlet valves, oil returns Valve, fuel outlet valve is 32mm in the internal diameter of its fully open position, with prevent it is cooked during the residue that is formed block；Fuel outlet valve is put Hydraulic fluid port is connected with the house steward that drains the oil；Oil return valve is connected by oil return house steward and the oil pump inside outer case, motor and shortening filter cart Connect.

Preferably, described heater assembly is made up of heating plate, support frame, rotary shaft, support frame and fryer oil groove Front side surface be in contact, heating plate be placed on is soaked with oil fryer oil groove bottom, rotary shaft be arranged on fryer oil groove it is rear on Side, rotary shaft is connected by pull bar with the draw ring installed in spring one end, and the draw ring of the spring other end is fixed on installed in fryer In mounting seat on rear side of oil groove.

Preferably, support frame as described above is configured to contact with it with only rear surface in the inner surface of fryer oil groove, institute To have reached the contact minimized, so that crumb collection is minimized, the effect of the heating plate of heater assembly in support frame It is lower that larger gap is provided between fryer oil groove bottom interior surface, so that food crumbs and residue and chip are easy to along fryer Edge inside oil groove, which slides, is moved to scrap collecting area, so drain the oil and filter process in can easily be eliminated, separately Crumb collection is set to minimize the effect in bubbling/disturbance stage when also enhancing filter process removal food crumbs and residue.

Preferably, described shortening filter cart includes lautertuns, return line, oil strain fence, filter paper for oil fixed frame, mistake Filter paper, bits basket and oil strain groove lid is connect, oil strain groove lid lid is connected on lautertuns, is from top to bottom disposed with inside lautertuns and connects bits Basket, filter paper, oil strain fence, filter paper are arranged on filter paper for oil fixed frame, and return line is further fixed in lautertuns.

Preferably, the fuel outlet of the fuel outlet valve is connected by the house steward that drains the oil with T-shaped drain line, T-shaped drain line goes out Mouth is located at the filtering mouthful top of oil strain groove lid in shortening filter cart, connects bits basket below filtering mouth, the cooking oil in fryer oil groove T-shaped drain line is discharged to by the house steward that drains the oil and enters shortening filter cart, then to connecing bits basket.

Preferably, described fryer oil groove includes left arm, right arm, antetheca vertical component effect, rear upper wall vertical component effect, posterior inferior wall Vertical component effect and multiple inside bending parts, left arm are connected with the first left inside bending part, the second left inside bending part transition successively, right Arm is connected with the first right interior bending part, the second right interior bending part transition successively, the interior bending before passing sequentially through first of antetheca vertical component effect Interior bending part transition connection, rear upper wall vertical component effect and posterior inferior wall before interior bending part, the 4th before bending part, the 3rd in before portion, second Bending part in after being connected with first between vertical component effect, posterior inferior wall vertical component effect is connected with interior bending part transition after second, and antetheca is vertical In before portion, rear upper wall vertical component effect, first before bending part-the four in after bending part, first in interior bending part after bending part and second Reduce interior bending after bending part, second in before the total length of fryer, the second left inside bending part, the second right interior bending part, the 4th Portion constitutes the much smaller cold oil area of depth of the relatively conventional deep fryer oil groove of volume.

Beneficial effects of the present invention：(1) there is automatic detection liquid level and reminds the ability of filling oil mass, it is simple to operate, save The heart is laborsaving.

(2) there is the side wall and front and back walls of skew so as to reduce fryer volume, its bottom cold oil area side wall and front and back walls Angle reaches fuel-efficient effect close to right angle to reduce cold oil area volume, and fryer bottom can be saved than general without deeper cold oil area The oil mass of logical about 4 one-tenth of deep fryer, and same fried culinary art effect can be reached.

(3) used cooking oil is filtered to extend culinary art life of oil, it is further fuel-efficient.

(4) heater in oil groove can screw out fryer, convenient for cleaning, and not influence heater to return to continuation in oil groove again Heating.

Brief description of the drawings

Describe the present invention in detail with reference to the accompanying drawings and detailed description；

Fig. 1 is structural representation of the invention；

Fig. 2 is Fig. 1 side view；

Fig. 3 is Fig. 1 rearview；

Fig. 4 is the dimensional structure diagram of fryer oil groove of the present invention；

Fig. 5 is A-A faces sectional view in Fig. 4；

Fig. 6 is the scheme of installation of heater assembly of the present invention and fryer oil groove；

Fig. 7 is the polycrystalline substance schematic diagram of fryer oil groove of the present invention；

Fig. 8 is the structural representation of heater assembly of the present invention；

Fig. 9 is the view that heater assembly of the present invention screws out fryer oil groove；

Figure 10 is the front view of fryer oil groove of the present invention；

Figure 11 is Figure 11 left view；

Figure 12 is overall side view of the invention；

Figure 13 is the decomposition texture schematic diagram of shortening filter cart of the present invention.

Embodiment

To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, with reference to Embodiment, is expanded on further the present invention.

Reference picture 1-13, present embodiment uses following technical scheme：Refueled with automatic detection liquid level and prompting Western-style province's deep fryer of function, including outer case 1, fryer oil groove 2, heater assembly 3, micro computer control panel 4 and shortening filter cart 5, multiple fryer oil grooves 2 are installed in outer case 1, each fryer oil groove 2 contain be used for fried business cook it is conventional in industry It is mounted on that the heater assembly 3 of rotation immersion can be gone up with rotating shaft in the oil of food, each fryer oil groove 2, for heating oil tank Cooking oil in cooking zone, the surface of outer case 1 be provided with each fryer oil groove 2 it is special, for controlling respective specific pot The low oil level for indicating filling oil mass demand is provided with the micro computer control panel 4 of cooking status, micro computer control panel 4 Door 7 is hinged with indicator lamp 6, outer case 1, door 7 is opened to provide the path of built-in shortening filter cart 5, and cooks system for this fryer Periodicmaintenance necessary to system；High level temperature sensor 201 and low liquid level TEMP are installed in the fryer oil groove 2 Device 202, high level temperature sensor 201 and low liquid level temperature sensor 202 are electrically connected with micro computer control panel 4, when high liquid Position temperature sensor 201 is when sensing predetermined oil temperature, deep fryer can operate at automatic detection liquid level pattern and remind filling with Keep oil level.

It is worth noting that, described each fryer oil groove 2 is respectively provided with identical element and function, the inwall of fryer oil groove 2 Filling oil-in 203 is provided with, the bottom of fryer oil groove 2 is provided with scrap collecting area 204, and the bottom of fryer oil groove 2 is also equipped with one To fuel outlet valve 205, oil return valve 206, fuel outlet valve 205 is 32mm in the internal diameter of its fully open position, with prevent it is cooked during shape Into residue block；The fuel outlet of fuel outlet valve 205 is connected with the house steward 8 that drains the oil；Oil return valve 206 is by oil return house steward 9 and is arranged on Oil pump 10, motor 11 inside outer case 1 are connected with shortening filter cart 5.

Described fryer oil groove 2 is that low oil mass is complained and quarrel loudly, further reduction oil mass ability, by being cooked with low oil mass, Fryer oil groove 2, can cook the food of equivalent with few about 40% oil of the deep fryer than conventional size；Fryer oil groove 2 includes There are left arm 2SA, right arm 2SD, antetheca vertical component effect 2FA, rear upper wall vertical component effect 2RA, posterior inferior wall vertical component effect 2RC and multiple to infolding Turn of bilge position, left arm 2SA is connected with the first left inside bending part 2SB, the second left inside bending part 2SC transition successively, right arm 2SD successively with Bending part 2SE, the second right interior bending part 2SF transition connection, antetheca vertical component effect 2FA interior bendings before passing sequentially through first in first right side Interior bending part 2FE transition connection before interior bending part 2FD, the 4th before bending part 2FC, the 3rd in before portion 2FB, second, rear upper wall hangs down It is interior after bending part 2RB, posterior inferior wall vertical component effect 2RC and second in after being directly connected with first between portion 2RA and posterior inferior wall vertical component effect 2RC Bending part 2RD transition is connected, infolding before interior bending part 2FB- the 4th before antetheca vertical component effect 2FA, rear upper wall vertical component effect 2RA, first Interior bending part 2RD reduces the total length of fryer, the second left inside bending part after bending part 2RB and second in after turn of bilge 2FE, first Interior bending part 2RD constitutes the relatively conventional oil of volume after bending part 2FE, second in before 2SC, the second right interior bending part 2SF, the 4th The much smaller cold oil area of the depth of fryer oil groove；Based on the reason for the bending part of above-mentioned oil groove wall, the fryer oil groove 2 of the present apparatus The oil mass contained is fewer than conventional fryer pot, but remains same cooking zone again.

It is worth noting that, described heater assembly 3 is made up of heating plate 301, support frame 302, rotary shaft 303, branch Support 302 is in contact with the front side surface of fryer oil groove 2, and heating plate 301 is placed on the bottom of fryer oil groove 2 for being soaked with oil, rotation Axle 303 is arranged on the back upper place of fryer oil groove 2, and rotary shaft 303 passes through pull bar 307 and the draw ring 305 installed in the one end of spring 304 Connection, the draw ring 305 of the other end of spring 304 is fixed in the mounting seat 306 of the rear side of fryer oil groove 2；In filter Afterwards, only when clearly detect complain and quarrel loudly in there is cooking oil and just start heater after reach predetermined liquid level, to prevent not Carry out dry combustion method；When fryer oil groove 2 needs cleaning, the heater assembly 3 being fixed on pivot axis plane can be lifted up, by Heater assembly 3 is rotated up certain angle in the pulling force of spring 304, (its angular dimension can be by adjusting draw ring about 305 Position is carried out), it is outer and no longer fall to be moved out to fryer oil groove 2, now conveniently and efficiently oil groove can be cleaned, clearly Heater assembly 3 is pressed downward after the completion of clean, so that it may rotated and be put back into fryer oil groove 2.

In addition, support frame as described above 302 is configured to contact with it with only rear surface in the inner surface of fryer oil groove 2, institute To have reached the contact minimized, so that crumb collection is minimized, the heating plate 301 of heater assembly 3 is in support frame 302 In the presence of with the bottom interior surface of fryer oil groove 2 can assemble between chip and the region of residue be provided with larger gap, gap can To support heater and bottom of fryer pot to be spaced apart so that chip away from heater, so as not to burn chip influence cooking oil quality and Service life, makes food crumbs and residue and chip be easy to be moved to scrap collecting area along the edge landing inside fryer oil groove 204, so drain the oil and filter process in can easily be eliminated, separately make crumb collection 204 minimize also enhanced The effect in bubbling/disturbance stage when filtration journey removal food crumbs and residue.

It is solid that present embodiment shortening filter cart 5 includes lautertuns 501, return line 502, oil strain fence 503, filter paper for oil Determine framework 504, filter paper 505, connect bits basket 506 and oil strain groove lid 507, the lid of oil strain groove lid 507 is connected on lautertuns 501, oil strain Groove lid 507 can block oil when foreign matter falls into and prevents from draining the oil and spill, and be from top to bottom disposed with inside lautertuns 501 and connect bits basket 506th, filter paper 505, oil strain fence 503, filter paper 505 are fixed and compressed by filter paper for oil fixed frame 504, it is not moved Position and influence oil filter effect, return line 502 is further fixed in lautertuns 501；The fuel outlet of the fuel outlet valve 205 is by draining the oil House steward 8 is connected with T-shaped drain line 12, and the outlet of T-shaped drain line 12 is located in the filtering mouthful 508 of oil strain groove lid 507 in shortening filter cart 5 Side, connects bits basket 506 and is arranged on below filtering mouth 508, the cooking oil in fryer oil groove 2 is discharged to T-shaped drain the oil by the house steward 8 that drains the oil Pipe 12 enters shortening filter cart 5, then to bits basket 506 is connect, it is the preliminary filtering for removing bulk residues food debris from oil to connect bits basket 506 Net, when oil is after connecing bits basket 506, it is deposited in lautertuns 501, and oil is located at lautertuns 501 by connecing bits basket 506 and passing through The filter paper 505 and oil strain fence 503 of bottom, the gap between oil strain fence 503 and lautertuns 501 can be such that oil swimmingly flows to Return line 502.

Outer case 1 in present embodiment diagram has four fryers, and outer case 1 can also be according to food service people The demand of member and increase, reduce the quantity complained and quarrel loudly, can at most increase to 8 fryers, the quantity of fryer is between 1-8 is individual.

Each fryer oil groove 2 during present embodiment is complained and quarrel loudly includes high level temperature sensor 201, low liquid level Temperature sensor 202, when high level temperature sensor 201 senses high level predetermined oil temperature, deep fryer energy normal work mould Formula, to keep oil level, after low liquid level temperature sensor 202 senses predetermined oil temperature, the fluid level controller of deep fryer is opened automatically Dynamic corresponding low oil level indicator lamp reminds staff to be that corresponding fryer oil groove increase cooking oil (reaches high to normal oil level The position of liquid level and temperature sensor 201), at this moment high level temperature sensor 201 will sense high level predetermined oil temperature, fried Pot returns to normal mode of operation, and high level predetermined oil temperature is from about 300 °F to 350 °F.Concrete operations are：

(1), can be in normal culinary art pattern when high level temperature sensor 201, which senses oil temperature, is at least about 300 °F Under；

(2) when the temperature difference of high level temperature sensor 201 and low liquid level temperature sensor 202 is to 40 °F, it is shown No longer it is immersed in oil, it will start low oil level indicator lamp 6 and reminds filling oil；

(3) it is 10 °F when high level temperature sensor 201 senses temperature and the temperature difference of low liquid level temperature sensor 202 Afterwards, show that it has been again dipped into oil, and show to complain and quarrel loudly there is desired oil mass, low oil level indicator lamp 6 extinguishes, into standby State continues to monitor oil temperature.

Micro computer control panel 4 can receive a variety of settings, such as temperature and timing setting, such as micro computer control panel 4 The number of times of the cooking cycle carried out in fryer oil groove 2 can be counted, after the cooking cycle of pre-determined number, micro computer chain of command Plate 4 points out user with such as lamp or audible indicator, and user can press the button on control panel to start Filter circulation.

When being cooked in fryer, fuel outlet valve 205 is opened, and used cooking oil in fryer oil groove 2 is discharged into through the house steward 8 that drains the oil To shortening filter cart 5, after shortening filter cart 5 is filtered, oil return valve 206 drives oil pump 10 that used oil is injected back into fryer through valve body by motor 11 In oil groove 2, it is continuing with；It should be noted that when before filter starting, air is sent through oil return valve 206 by oil pump 10 Into fryer oil groove 2 to produce bubble, bubble will disturb cooking oil and remove residue from sidepiece and the gap complained and quarrel loudly, can It is enough to be removed in discharge process.

Present embodiment is simple to operate, the ability with automatic detection liquid level and prompting filling oil mass, same reaching Oil mass can be greatlyd save on the premise of the fried culinary art effect of sample, it is convenient for cleaning, with wide market application foreground.

The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (7)

1. with automatic detection liquid level and remind oiling function Western-style province's deep fryer, it is characterised in that including outer case (1), 1-8 are provided with fryer oil groove (2), heater assembly (3), micro computer control panel (4) and shortening filter cart (5), outer case (1) Fryer oil groove (2), is each mounted on that the heater assembly (3) of rotation immersion, outer case can be gone up with rotating shaft in fryer oil groove (2) (1) surface, which is provided with micro computer control panel (4), micro computer control panel (4), to be provided with for indicating that filling oil mass is needed Door (7) is hinged with the low oil level indicator lamp (6) asked, outer case (1), outer case (1) is built-in with shortening filter cart (5), described to complain and quarrel loudly High level temperature sensor (201) and low liquid level temperature sensor (202), high level temperature sensor are installed in oil groove (2) (201) electrically connected with low liquid level temperature sensor (202) with micro computer control panel (4).

2. Western-style province's deep fryer according to claim 1 with automatic detection liquid level and prompting oiling function, its feature It is, described fryer oil groove (2) inwall is provided with filling oil-in (203), and fryer oil groove (2) bottom is provided with scrap collecting Area (204), fryer oil groove (2) bottom is also equipped with a pair of fuel outlet valves (205), oil return valves (206), the internal diameter of fuel outlet valve (205) For 32mm, the fuel outlet of fuel outlet valve (205) is connected with the house steward that drains the oil (8), and oil return valve (206) is by oil return house steward (9) and installs It is connected in the internal oil pump (10) of outer case (1), motor (11) with shortening filter cart (5).

3. Western-style province's deep fryer according to claim 1 with automatic detection liquid level and prompting oiling function, its feature It is, described heater assembly (3) is made up of heating plate (301), support frame (302), rotary shaft (303), support frame (302) It is in contact with the front side surface of fryer oil groove (2), heating plate (301) is placed on fryer oil groove (2) bottom for being soaked with oil, rotary shaft (303) back upper place of fryer oil groove (2) is arranged on, rotary shaft (303) is connected by pull bar (307) with draw ring (305), spring (304) draw ring (305) of the other end is fixed in the mounting seat (306) on rear side of fryer oil groove (2).

4. Western-style province's deep fryer with automatic detection liquid level and prompting oiling function according to Claims 2 or 3, it is special Levy and be, the heating plate (301) of the heater assembly (3) in the presence of the support frame (302) with fryer oil groove (2) bottom Gap is provided between surface and scrap collecting area (204).

5. Western-style province's deep fryer according to claim 1 with automatic detection liquid level and prompting oiling function, its feature It is, described shortening filter cart (5), which includes lautertuns (501), return line (502), oil strain fence (503), filter paper for oil, to be fixed Framework (504), filter paper (505), bits basket (506) and oil strain groove lid (507) is connect, oil strain groove lid (507) is covered and is connected on lautertuns (501) on, from top to bottom it is disposed with inside lautertuns (501) and connects bits basket (506), filter paper (505), oil strain fence (503), filter paper (505) is arranged on filter paper for oil fixed frame (504), and lautertuns is further fixed on return line in (501) (502)。

6. Western-style province's deep fryer according to claim 2 with automatic detection liquid level and prompting oiling function, its feature It is, the fuel outlet of the fuel outlet valve (205) is connected by the house steward that drains the oil (8) with T-shaped drain line (12), T-shaped drain line (12) Outlet be located above the filtering mouthful (508) of oil strain groove lid (507) in shortening filter cart (5), connect bits basket (506) and be arranged on filtering mouth (508) lower section.

7. Western-style province's deep fryer according to claim 1 with automatic detection liquid level and prompting oiling function, its feature It is, described fryer oil groove (2) includes left arm (2SA), right arm (2SD), antetheca vertical component effect (2FA), rear upper wall vertical component effect (2RA), posterior inferior wall vertical component effect (2RC) and multiple inside bending parts, left arm (2SA) successively with the first left inside bending part (2SB), the second left inside bending part (2SC) transition connection, right arm (2SD) is interior with the first right interior bending part (2SE), second right side successively Bending part (2SF) transition is connected, and antetheca vertical component effect (2FA) passes through bending part in before bending part (2FB), second in before first In before (2FC), the 3rd before bending part (2FD), the 4th in bending part (2FE) transition connection, rear upper wall vertical component effect (2RA) with it is rear under Bending part in after bending part (2RB) in after being connected with first between wall vertical component effect (2RC), posterior inferior wall vertical component effect (2RC) and second (2RD) transition is connected, the second left inside bending part (2SC), second it is right in before bending part (2SF), the 4th in bending part (2FE), the Bending part (2RD) is formed with the less cold oil area of volume in after two.