JP4795833B2 - Flyer - Google Patents

Description

  The present invention relates to a fryer that performs automatic recovery of frying waste and the like and automatic cleaning of cooking oil, maintains the transparency of cooking oil, prevents deterioration, and makes cooking oil last longer.

In a conventional fryer, water, a low temperature oil part, and a high temperature oil part are stored in the storage tank in order from the bottom, and the stored water and cooking oil are in contact with each other in the same storage tank. Some oil reservoirs are provided with heaters so that cooking oil can be heated to a predetermined temperature (Patent Documents 1 to 3).
In such a fryer, fine fried residue or colloidal fried product that is released from the food and diffused into the oil when fried is cooked, or water that has flowed out of the food (hereinafter referred to as foreign matter). The oil is allowed to fall freely to the bottom of the storage tank, so that the deterioration of cooking oil due to the turbidity of these foreign matters is reduced.

Also, the cooking oil containing foreign matter in the oil layer is sucked with a pump and discharged to the bottom of the water layer by the oil feed pipe, so that the foreign matter such as fried residue is separated and subsided while the cooking oil rises in the water layer In the same manner, there is also one that extends the life of cooking oil (Patent Document 4).
In addition to this, a frying removal device that removes foreign matter in a storage tank that is formed separately from the fryer and separates cooking oil containing foreign matter such as fried residue into an oil layer and an aqueous layer is provided, and the cooking oil is provided by a pump. In some cases, the foreign material is removed by circulating between the flyer and the lifting device (Patent Document 5).

Japanese Utility Model Publication No. 05-68440 Japanese Patent Publication No.55-40249 Japanese Utility Model Publication No. 60-09426 Japanese Patent Publication No.58-22207 Japanese Utility Model Publication No. 56-11860

〔problem〕
In such a conventional fryer, the cooking oil is heated by a heater disposed in the oil layer, the temperature drop is prevented during cooking, and the temperature is returned to the set temperature in a short time, so that the temperature is higher than the cooking temperature of the oil. In particular, the oil that is in contact with the heater surface is exposed to a temperature much higher than the cooking set temperature.
Moreover, since the temperature range of cooking oil in which fried cooking is performed coincides with the temperature range that promotes deterioration and oxidation of cooking oil, the deterioration and oxidation of cooking oil are promoted during cooking and cooking, and smoke and Vaporization is active and pollutes the environment, and the cooking oil composition is rapidly changed.

  For this reason, the temperature of the cooking oil is kept at a slightly lower temperature than during cooking when waiting for cooking (hereinafter referred to as standby), and can be rapidly raised to the cooking temperature during cooking. There has been a demand for an apparatus that can be easily cooked and that can suppress a reduction in the quality of cooking oil.

  The present invention has been made in view of the above problems in the prior art, and the technical problem specifically set in order to solve this problem is that the temperature of the cooking oil is higher than that during cooking when waiting for cooking. It is kept at a slightly lower temperature and can be quickly raised to cooking temperature during cooking, heat exchange of cooking oil is easy, deterioration of cooking oil can be prevented, a good cooking environment is ensured, and working together It is an object of the present invention to provide a flyer that can increase efficiency and reduce economic burden, prevent environmental pollution, and improve work efficiency.

In order to identify a flyer that can effectively solve the above-mentioned problems in the present invention, all the matters recognized as necessary are covered and specifically configured as the problem solving means.
The first problem-solving means relating to the fryer includes a storage tank that stores cooking oil and water for purifying the oil in two upper and lower layers, an aqueous layer that is stored below in the storage tank, and this An oil layer stored above the boundary of the oil and water that directly contacts the lower surface of the water layer with the upper surface of the water layer, and a heater disposed in the oil layer, and the water layer in the storage tank or the lower part of the heater The oil layer is rotated horizontally in a spiral shape.

  The second problem-solving means according to the above flyer is that the water in the water layer is sucked from the water inlet provided in the central portion of the bottom of the storage tank, and is substantially horizontal and eccentric from the water supply port provided in the side wall of the storage tank. It is characterized by rotating the water in the storage tank in a vortex shape.

  The third problem-solving means according to the above flyer is that the water in the water layer is sucked by a submersible pump provided in the vicinity of the side wall in the water layer of the storage tank, and the water in the storage tank is swirled in a substantially horizontal direction. It is made to rotate.

  The fourth problem-solving means relating to the above flyer is that the oil in the oil layer is sucked out of the storage tank by an oil pump provided outside the storage tank, and is substantially horizontal and eccentric from the oil supply port provided on the side wall of the storage tank. It discharge | releases toward the direction and rotates the oil layer of the said heater lower part in a storage tank in the shape of a vortex.

  The fifth problem-solving means relating to the above flyer is that the oil in the oil layer is sucked by an oil pump provided near the side wall in the lower part of the heater of the storage tank, and the oil in the storage tank rotates in a spiral manner by releasing it in a substantially horizontal direction. It is characterized by making it.

  The sixth problem-solving means according to the above flyer is characterized in that the storage tank is formed in a conical shape or a pyramid shape having a bottom protruding downward.

  The seventh problem-solving means according to the flyer is characterized in that the oil in the oil layer is rotated around the heater by the spiral rotation of the water in the water layer.

  The eighth problem-solving means according to the flyer is the same as that described above, wherein a filtration water tank having a filter is installed in the vicinity of the storage tank, and a water layer is formed together with foreign matters such as frying residue from a water inlet provided at the bottom center of the storage tank. The suctioned water was sucked in, the sucked water was put into the filtration water tank, foreign matters such as fried residue were filtered through the filter and precipitated at the bottom of the filtration water tank, and the filtered water was provided on the side wall of the storage tank. It returns to the said water layer so that it may flow from the said water supply port along the said storage tank side wall in a substantially horizontal direction.

  In the first problem-solving means relating to the fryer, the water or oil layer lower part in the water layer is rotated in a spiral shape horizontally below the heater of the water layer or oil layer in the storage tank, and the rotational force and viscosity are rotated. This causes a horizontal rotation of the entire oil layer, enhances heat exchange between the heater and oil disposed in the oil layer, keeps the temperature of the cooking oil at a temperature that does not easily degrade during standby, It is possible to quickly raise the oil above the heater installation position to the cooking temperature, shorten the time it takes for the oil temperature to rise and return to the cooking temperature, and temperature followability at the time of temperature rise By improving, it is possible to eliminate the necessity of setting the heater temperature higher than the cooking temperature of the oil, minimize the influence of heating, and suppress the deterioration of the oil quality.

  In the second problem-solving means relating to the fryer, the water in the water layer is sucked from the water inlet provided at the bottom of the storage tank, and discharged from the water supply port of the water layer in a substantially horizontal direction and in an eccentric direction. Rotating the water in the layer into a large vortex, rotating the oil layer in contact with the water layer by the rotational force and viscosity of the water, increasing the heat exchange between the heater and oil arranged in the oil layer, waiting Keeps the temperature of the cooking oil at a temperature where the quality is unlikely to deteriorate, and during cooking, the oil above the heater location in the oil layer can be rapidly raised to the cooking temperature, raising the oil temperature and cooking temperature By reducing the time it takes to recover until the temperature rises and improving the temperature followability at the time of temperature rise, it eliminates the need to set the heater temperature higher than the cooking temperature of the oil, minimizing the effects of heating, Oil quality deterioration can be suppressed.

  In the third problem-solving means according to the flyer, by providing a submersible pump in the water layer of the storage tank, the water in the water layer is rotated in a large vortex, and the boundary is in contact with the water layer by the rotating water. The oil layer can be rotated to enhance the heat exchange between the heater disposed in the oil layer and the oil.

  Further, in the fourth problem-solving means relating to the fryer, the oil in the oil layer is rotated in a large swirl shape to increase the heat exchange between the heater and the oil disposed in the oil layer, and the temperature of the cooking oil is the quality during standby. Keeping the temperature at a low temperature, during cooking, the oil above the heater location in the oil layer can be rapidly raised to the cooking temperature, and the time required for the oil temperature to rise and return to the cooking temperature can be reduced. By shortening and improving the temperature followability at the time of temperature rise, it eliminates the need to set the heater temperature higher than the cooking temperature of oil, minimizes the effects of heating, and suppresses oil quality deterioration be able to.

  Further, in the fifth problem-solving means relating to the fryer, by providing a submerged pump in the oil reservoir of the storage tank, the water in the oil reservoir is rotated in a large vortex, and the heater and oil disposed in the oil reservoir Heat exchange can be enhanced.

  Further, in the sixth problem solving means relating to the fryer, the bottom of the storage tank is formed in a convex conical shape or a pyramid shape, so that foreign matter such as frying waste can be easily dropped to the lowest part, and water is discharged from the water inlet. When sucking, foreign matter such as fried residue can be sucked without leakage to purify the water in the water layer.

Further, in the seventh problem-solving means relating to the fryer, the oil layer is rotated through the oil-water boundary due to the swirl rotation generated in the water layer, and the rotational movement of the oil around the heater increases the contact with the heater. By changing from natural convection heat transfer to forced convection heat transfer, the amount of heat exchange can be increased, the oil temperature can be increased, the heat exchange efficiency can be improved, and the heater temperature is not raised too high. The oil temperature can reach the set temperature, and the deterioration of the oil can be effectively prevented.
In addition, since the oil temperature can be quickly raised to the set temperature, it is possible to wait at an oil temperature lower than the cooking temperature during standby, which can more effectively prevent the deterioration of the oil and cost associated with the heat source. Can be saved.
In addition, at the boundary between oil and water, the oil is swollen by water and the foreign matter such as fine fried debris mixed in the oil is dropped into the water to purify the oil and clean the oil It is possible to remove liquid effluents and odorous components from foods contained in oil.

  In the eighth problem-solving means related to the fryer, the water in the water layer is sucked from the water inlet of the storage tank together with foreign matter such as fried residue and transferred to the filtered water tank, and the foreign matter such as fried residue is filtered and filtered. The water is allowed to settle at the bottom of the water tank, and the filtered water is returned to the water layer from the water supply port provided near the side wall at the bottom of the tank so that it flows in the horizontal direction along the side wall of the tank. In addition to collecting foreign matter such as frying debris at the center of the vortex of the water layer so that it can be efficiently sucked from the water intake port, foreign matter such as frying debris contained in the sucked water is surely secured by the filter of the filtration water tank. The water can be effectively purified by returning the filtered water to the water layer. And oil can also be purified with purification of water.

Hereinafter, the best embodiment according to the present invention will be described in detail.
However, this embodiment is specifically described for better understanding of the gist of the invention, and does not limit the content of the invention unless otherwise specified.

〔Constitution〕
As shown in FIGS. 1 to 5, the embodiment of the fryer 1 includes cooking oil and water for purifying the oil by collecting foreign matter such as fried residue in the oil, A water circulation path 2 comprising a storage tank 1a for storing the upper and lower two layers (oil layer 11 and water layer 12), and a filtered water tank 2a formed of a transparent material detachably installed at a position close to the storage tank 1a, It is attached to the outer wall of the storage tank 1a, sucks oil from the oil high temperature portion 11b through the oil suction port 3f at the upper end, and drops foreign matters such as fried residue from the lower end opening (fried residue discharge port) 3g to the water layer 12 side. The oil sucked by the oil pump 3b at a height corresponding to the vicinity of the boundary between the oil low temperature part 11a and the oil high temperature part 11b in the middle of the flow path is branched to the outside of the storage tank via the oil circulation system pipe 3c, and the outer surface The cooling fan 3d is overhanged and the wind from the cooling fan 4 is A box-type flow path 3a that can be more forcibly cooled, and an oil circulation path 3 that sucks oil from the box-type flow path 3a and flows out to the water layer 12 in the storage tank via an oil circulation system pipe 3c outside the storage tank; Are housed in a box-like housing 1b to be compact, and a part of the housing 1b is cut away so that the inside of the filtered water tank 2a can be visually observed.

As shown in FIGS. 2, 4, and 5, the oil layer 11 (11 a, 11 b) of the storage tank 1 a is provided with a heater 5 for heating oil, and the heater 5 is positioned slightly above the center of the oil layer 11. After the heater 5 is heated, it is divided into two layers of a high-temperature part and a low-temperature part slightly below the position where the heater 5 is arranged (hereinafter, the high-temperature part of this oil is changed to the high-temperature part of the oil). 11b, and the low temperature part of the oil is referred to as the oil low temperature part 11a).
As a result, in the storage tank 1a, three layers of water, the oil low temperature part 11a, and the oil high temperature part 11b are formed in order from the bottom.

Among these, the oil high-temperature part 11b is an oil frying part that sinks food with frying clothes and the like placed on a fried food basket formed of a thin metal rod or a wire mesh or the like and fries it at an appropriate temperature.
The low-temperature oil part 11a forms a temperature buffer part between the high-temperature oil part 11b and water, and also serves as a supply source of new oil that has not been adjusted or deteriorated.
The water layer 12 plays a role of a sediment layer for precipitating foreign matters such as frying residue generated during the frying operation of the food, and takes charge of foreign matter accumulation, and also performs functions such as washing of oil and temperature adjustment by moving water.
A water level sensor 1c is provided at the boundary position between the water layer 12 of the storage tank 1a and the low temperature oil part 11a, and the boundary between the oil and water is constantly grasped. If the water level is too high or too low, an alarm lamp and buzzer are used. To be informed.

  As shown in FIG. 4, the water circulation path 2 is sucked from a suction port (water suction port) 2b provided at the center of the bottom formed in a downwardly convex cone or pyramid, and is connected to the pipe 2c and the shutoff valve 2d. The water purified into the filtered water tank 2a is sucked from the suction port 2f of the filtered water tank 2a by the water pump 2e and flows into the defoaming water tank 2g, and the bubbles are raised upward in the defoamed water tank 2g. Water that has been floated and from which bubbles have been removed flows out from the outlet 2h of the defoaming water tank 2g, and is returned to the water layer 12 from the water supply port 2i provided at the top of the water layer 12 that accumulates in the bottom layer of the storage tank 1a. Form a circulation path.

  The filtered water tank 2a is a non-purified water storage part of the filtered water tank 2a in which a filter 2j having a 0.7 mm mesh made of stainless steel that divides the inside into two is vertically installed, and water is sucked from the storage tank 1a by a water pump 2e. When flowing into 2k, water passes through the filter 2j and exits to the purified water reservoir 2l side, and the non-purified water reservoir 2k of the filter 2j filters out foreign matters such as frying debris and sinks to the bottom. In addition, the purified water storage part 2l downstream of the filter 2j is provided with a suction port 2f for supplying water to the water layer 12 in the storage tank 1a, and the storage tank 1a and the filtered water tank 2a are connected to each other by piping of the water circulation path 2. It connects so that water can circulate between 2g of bubble water tanks.

  As shown in FIG. 5, the oil circulation path 3 includes a sheet metal box-shaped flow path 3a attached to the outer wall of the storage tank 1a, a pipe 3c made of a circular pipe, an oil discharge nozzle 3e, and an oil pump 3b. The mold channel 3a is attached to the storage tank 1a and sucks oil from the vicinity of the upper surface of the high temperature oil portion 11b through the oil suction port 3f drilled in the upper end portion, and removes foreign matter such as frying residue from the lowermost opening 3g. The pipe 3c is connected to the lower side of the height position corresponding to the boundary between the oil high temperature part 11b and the oil low temperature part 11a in the middle position of the box-type flow path 3a. The oil sucked by the pump 3b is discharged to the outside through the pipe 3c and is formed so as to be sent to the water layer 12 through the oil discharge nozzle 3e. Then, a large number of fins 3d are provided on the outer surface side of the box-type flow path 3a so as to be forcedly cooled by the wind from the cooling fan 4, so that the oil passing through the inside of the box-type flow path 3a rapidly Allow to cool.

  As shown in FIG. 6, the oil discharge nozzle 3e protruding into the water layer 12 is the terminal end of the oil circulation path 3, and is arranged with the longitudinal direction of the pipe horizontally at the lower end of the water layer 12, and the oil discharge nozzle 3e An oil discharge member 3i having a small number of small holes 3h,..., 3h drilled in the upper surface at the distal end, a semicircular cross section and an open lower surface, and a closed end. The oil that is fixed and passes through is divided into small holes (small oil passage holes) 3h,..., 3h, floats to the upper oil low temperature portion 11a in a small ball or continuous form, and is included in the oil It is formed so that foreign matter such as fine fried residue can be dropped into water.

  Also, as shown in FIG. 4, an air vent pipe 7a is connected to the upper end of the defoaming water tank 2g via a water side exhaust pipe joint 7f, and the upper end of a gas reservoir 3j formed above the oil pump 3b. A pipe 7b is connected to the pipe 7b through an internal pressure adjusting joint 7g as a pressure regulating exhaust means for venting air, and the pipes 7a and 7b are joined by the joint joint 7c at a position close to the oil pump 3b, and downstream of the joint joint 7c. An internal pressure adjusting joint 7e, which is a pressure adjusting exhaust means, is provided at the tip of the merging side pipe 7d connected to the pipe, connected to the upper end of the box-type flow path 3a, and the air accumulated in the upper part of the defoaming water tank 2g, the oil pump 3b, An air vent path 7 is formed for exhausting both the water vapor accumulated in the upper portion of the gas tank and adjusting the pressure so that the pressure in the air reservoir in the defoaming water tank 2g and the gas reservoir 3j provided on the oil pump 3b side is substantially constant.

In the air vent path 7 formed in this way, when oil and water are circulated, the air stored in the water circulation path 2 when not circulating is accumulated at the upper end of the defoaming water tank 2g, and the water in the oil What has evaporated and accumulated at the upper end of the oil pump 3b is joined by the air vent pipe 7a and the air vent pipe 7b connected via the internal pressure adjusting joint 7g at the joint joint 7c, and then the joint side pipe 7d. When the internal pressure of the tank rises above the specified pressure, the air is exhausted from the internal pressure adjusting joint 7e to above the high temperature oil portion 11b of the storage tank 1a.
Since the exhaust is always performed when the pressure exceeds the specified pressure, the amount of air stored in the upper end of the defoaming water tank 2g and the amount of water vapor stored in the upper end of the oil pump 3b are both reduced to a small amount. It is possible to prevent air and water vapor from being mixed into the high temperature oil portion 11b during the circulation of the oil, and to avoid a sudden boiling accident due to sudden expansion of air or water vapor.

The water in the water layer 12 provided at the lower end of the storage tank 1a is absorbed by the storage tank 1a and the filtered water tank 2a by the water circulation path 2 including the filtered water tank 2a in response to the suction force / power output by the water pump 2e of the water circulation path 2. It circulates between 2g of bubble water tanks, purifies water itself, and purifies oil.
As shown in FIGS. 4 and 7, the water is circulated by sucking together water in the water layer 12 and foreign matter such as fried debris from a water inlet 2 b provided at the bottom of the storage tank 1 a, and piping 2 c of the water circulation path 2. Then, it flows into the filtered water tank 2a through the shutoff valve 2d, filters foreign matter such as fried residue by a filter 2j provided in the filtered water tank 2a, and purifies the purified water in the filtered water tank 2a by filtering the foreign material. Suction is performed from the storage side and returned to the storage tank 1a by the water pump 2e. When returned to the storage tank 1a, it is directed substantially horizontally along the side wall 1e on the side that is adjacent to the suction port 2f that is perpendicular to the side wall 1d on the back side of the storage tank 1a and the side surface is oriented in the horizontal direction. By discharging the purified water, the water in the storage tank 1a is rotated in a spiral. With the rotation of water, the oil low temperature part 11a located immediately above in contact with water starts to turn around with a time delay, and the oil high temperature part 11b above the oil low temperature part 11a also turns around with a further delay.

  At this time, when the momentum of the water is increased, the oil low temperature part 11a is vigorously stirred, and the oil is washed by shaking it into the water to fine foreign matters such as fried residue contained in the oil. Even in this case, the upper part of the oil low temperature part 11a rotates in a relatively quiet state without the lower stirring state, and the oil high temperature part 11b rotates relatively gently according to the rotational force in the upper part of the oil low temperature part 11a. Heat is received from the heater 5.

  As shown in FIGS. 5 and 6, the oil is circulated from the cooling fan 4 by sucking the oil from the upper part of the oil high-temperature part 11 b at the upper end of the box-shaped flow path 3 a for the purpose of adjusting the temperature of the oil and cleaning. The air is forcedly cooled by the wind of the air to lower the temperature from 170 ° C. to 70-80 ° C., discharged from the height position corresponding to the upper end of the low temperature oil portion 11a of the box-type flow path 3a to the outside through the pipe 3c, The oil is sent to the water layer 12 by the pump 3b, and the oil sent to the water layer 12 is divided into small portions from the oil discharge member 3i fixed to the oil discharge nozzle 3e and discharged into the water, thereby making the oil small spherical or continuous. This makes it easy to separate the foreign matter such as fine fried debris contained in the oil into the water, cools it, and floats in the water while dropping the foreign matter into the oil low temperature part 11a. After reaching, they are combined as a constituent of the oil layer 11.

[Function and effect]
In the embodiment of the flyer configured as described above, the heating state is maintained at a slightly low temperature (standby temperature) during standby when the fly is not fried. For example, as shown in FIG. In the case of frying, the temperature is controlled so that the standby temperature is lowered to about 150 ° C. and the standby is performed.
Immediately before frying, when the frying operation is performed by pressing the switch 1g provided on the front panel 1f of the apparatus to raise the fly, the temperature of the heater 5 rises and the oil temperature for the frying (the oil temperature is set from the standby temperature ( For example, the temperature is raised to 170 ° C. Since the heater 5 is arranged in the oil high temperature part 11b, only the oil high temperature part 11b rises to the set temperature, but in the oil low temperature part 11a, the high temperature oil rises and coalesces with the oil in the oil high temperature part 11b. When the oil is relatively low, it goes down to the oil low temperature part 11a and coalesces with the oil in the oil low temperature part 11a. Therefore, there are always two layers of the oil high temperature part 11b and the oil low temperature part 11a. The water layer 12 in contact with the part 11a is not overheated, and the oil high temperature part 11b can maintain the set temperature for frying.

Also at this time, by rotating the water of the water layer 12, the heating mode can be changed from natural convection heat transfer to forced convection heat transfer, and the heat exchange performance by the heater 5 can be enhanced. The temperature rises well following the rise of the temperature, and can quickly return from the standby state to the state of the frying operation.
For this reason, the time required for starting up and returning the oil temperature is shortened, and the temperature followability of the oil heated by the heater 5 is improved. Therefore, the rising temperature of the heater can be suppressed, and the oil temperature can be reduced even when used repeatedly. Deterioration can be prevented.

  When the material to be fried is put into the high temperature oil portion 11b, a normal frying operation is performed, and a large amount of fried residue is generated when fried. When the large amount of the generated fried residue is generated, it quickly falls downward, descends to the water layer 12 through the low temperature oil part 11a, and the filtered water tank according to the water circulation path 2 by the action of the operating water pump 2e. It is sent to 2a, the fried residue is filtered, and the filtered water is returned to the water layer 12 again. On the other hand, the small fried residue is sucked together with the oil in the oil high temperature portion 11b together with the oil in the upper portion of the oil high temperature portion 11b at the upper end of the box flow passage 3a, and is forcibly cooled in the box flow passage 3a. The oil that has been reduced in temperature is lowered from the opening 3g provided at the lower end of the box-shaped flow path 3a to the water layer 12, and the temperature of the oil is lowered from a height corresponding to the oil low temperature portion 11a. It is discharged to the outside through the pipe 3c, sent to the water layer 12 by the operating oil pump 3b, and is divided into small portions from the oil discharge member 3i of the oil discharge nozzle 3e disposed in the water layer 12. The oil is released into the water 12 and comes into contact with the water in a small spherical or continuous form, allowing it to cool and easily separate foreign matter such as fine frying debris contained in the oil into the water. The oil low temperature part 1 Coalescing the oil in the oil temperature portion 11a as a constituent of the oil low temperature section 11a after reaching to a.

  In this way, the frying residue is effectively filtered by the water circulation and the oil circulation, and the oil in contact with the water is rotated by generating a large vortex in the water layer 12, so that the water contacts with the water. The oil is washed out by increasing the amount of oil and prevents deterioration of the oil. Furthermore, when the water layer 12 rotates in a spiral shape, the oil in the upper layer of the water slowly rotates, so that the oil whose temperature has risen at the heater surface portion efficiently transfers heat to the oil in the entire oil layer 11, The time required for the oil temperature to rise and to return from the standby state is shortened.

  In addition, the oil cleaning effect can be improved without emulsifying the oil by circulating the oil, the frying residue can be prevented from being accumulated, and the cooled oil can be introduced into the water by effectively lowering the temperature of the oil. The oil circulation can be functioned while improving the safety, and the oil can be divided and released as small spheres or continuous in the water, so that the oil washing effect can be enhanced. .

  Thereby, the oil in the vicinity of the wall surface of the storage tank 1a whose temperature is lower than that of the central portion of the oil high temperature portion 11b is sucked, the box-type channel 3a is sucked, and the cooling fan is passed through the box-type channel 3a. When the cooling air is received by the cooling fins 3d and returned to the water layer 12 which is the lowermost layer of the storage tank 1a, for example, the oil at 170 ° C. is lowered to 70 to 80 ° C. to the water layer 12 It can be drawn in safely, and by separating foreign matter such as fried residue from the two locations of the lower end of the box-type flow path 3a and the oil discharge member 3i fixed to the oil discharge nozzle 3e, more foreign matter can be removed. It can be removed and the cleaning effect of oil can be enhanced.

  When the water is circulated, the water in the water layer 12 rotates in a spiral shape, and the oil is rotated by the rotational force. As a result, the amount of heat transfer from the heater 5 increases and the temperature of the heater 5 is increased effectively. The difference from the oil temperature is reduced, the temperature followability during heating is improved, and the heating temperature of the heater can be reduced to a temperature at which the oil is difficult to deteriorate. It is possible to effectively prevent the deterioration of the oil by the synergistic effect that the mixing is reduced.

For this reason, until now, when the oil temperature is set to 170 ° C. in the case of the single-phase 200V heater power 3 kW shown in FIG. 8 for example, the temperature of the heater 5 needs to be increased to about 215 ° C. However, by turning the water, the oil also turns, the heat exchange efficiency is increased, the temperature difference is reduced, and the oil temperature is 170 ° C. Even when the temperature becomes, the heater temperature does not exceed 185 ° C. and can be used while suppressing oil deterioration as much as possible.
Specifically, even if the fries and tempura are fried about a total of 40 times and a month has passed, there is no deterioration or discoloration of the oil, and there is no greasy smell even during temperature rise. The effect of good cutting was obtained.

[Another aspect]
Such an embodiment is specifically described in order to facilitate understanding of the gist of the invention, but does not limit the content of the invention, and is not particularly described (including design content). The embodiment is not limited, and may be changed as appropriate. In this sense, some other embodiments that meet the spirit of the invention are shown below.

For example, the shape of the storage tank 1a is not particularly limited to a bottomed rectangular tube, and can be applied to a bottomed cylinder or another rotating body as long as there is no problem in manufacturing or use.
Further, the fin 3d of the box-type flow path 3a may be provided with a fin that protrudes inside the flow path and also serves as a current plate.
Moreover, the box-shaped flow path 3a does not need to be limited to a rectangular cross section, and may have any shape that can easily separate foreign matter after suction, and can be changed to an appropriate shape if the cross-sectional area is larger than that of general piping. Can do.
As the heating source, the case of heating by electric power is exemplified, but gas heating may be used.

The rotation of the oil layer 11 is dependent on the method of rotating the oil layer 11 indirectly by rotating the water sent out by the water pump 2e in the water layer 12 of the storage tank 1a. The water layer 12 may be directly rotated by providing the submersible pump 2m, and the oil layer 11 may be rotated by the rotational force of the water.
In addition, the oil layer 11 may be rotated by directly providing an oil pump (not shown) in the oil layer 11 of the storage tank 1a. In order to directly rotate the oil layer 11, in addition to this, part of the oil sent from the oil pump 3b is branched and sent to the lower part of the oil layer 11, and the lower part of the oil layer 11 is directly rotated as in the case of water. Also good. Further, a path provided with a new dedicated pump (not shown) for rotating the oil layer may be added to the oil circulation path 3 to directly rotate the lower part of the oil layer 11.

It is a front view which shows the fryer which concerns on embodiment of this invention. It is a top view which shows a flyer same as the above. It is a right view which shows a fryer same as the above. It is 3 surface explanatory drawing which shows the water circulation path of a flyer same as the above in the state which removed the housing | casing, (A) is a right view, (B) is a top view, (C) is a rear view. It is a three-plane explanatory view showing the oil circulation path of the fryer with the housing removed, (A) is a front view, (B) is a plan view, and (C) is a right side view. It is attachment explanatory drawing which expands and shows the oil discharge member 3i fixed to the oil discharge nozzle 3e arrange | positioned at the storage tank of a fryer same as the above, (A) is a front view, (B) is a top view. It is plane explanatory drawing which shows the eddy generation | occurrence | production state of the water layer in the storage tank of a fryer same as the above. It is a graph which shows the actual temperature when it heats up, setting the temperature of oil for frying using a fryer same as the above. It is plane explanatory drawing which shows the vortex generating condition produced with the pump provided in the storage tank of a fryer same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flyer 1a Storage tank 1b Case 1d (Back side) Side wall 1e (Side side) Side wall 1f Front panel 1g Switch 2 Water circulation path 2a Filtration water tank 2b (Storage tank) Suction port [Water absorption port]
2c Piping 2d Shut-off valve 2e Water pump 2f Suction port 2g (for filtered water tank) 2g Defoamed water tank 2h Outlet 2i (for defoamed water tank) 2i Water supply port 2j Filter 2k Non-purified water reservoir 2l Purified water reservoir 2m Submersible pump 3 Oil circulation path 3a Box-type flow path 3b Oil pump 3c Oil circulation system piping 3d Cooling fin 3e Oil discharge nozzle 3f Oil suction port 3g Opening [Drying waste discharge port]
3h Small hole 3i Oil discharge member 3j Gas storage 4 Cooling fan 5 Heater 7 Air venting path 7a, 7b Piping 7c Junction joint 7d Junction side pipe 7e (Water side) internal pressure adjustment joint [pressure adjusting exhaust means]
7f Pipe joint for water side exhaust 7g (Oil side) Internal pressure adjustment joint [Pressure regulating exhaust means]
11 Oil layer 11a Oil low temperature part 11b Oil high temperature part 12 Water layer

Claims (8)

A storage tank for storing cooking oil and water for purifying the oil in two upper and lower layers;
A water layer stored below in this storage tank,
An oil layer stored above the boundary of the oily water that directly contacts the lower surface of the oil with the upper surface of the water layer;
A heater disposed in the oil layer,
A fryer characterized by rotating the water layer in the storage tank or the oil layer below the heater horizontally in a spiral.   The water in the water layer is sucked from the water inlet provided at the bottom center of the storage tank, and discharged from the water supply port provided in the side wall of the storage tank in a substantially horizontal direction and in an eccentric direction, so that the water in the storage tank is swirled. The fryer according to claim 1, wherein the fryer is rotated in a rotating manner.   2. The water in the water layer is sucked by a submersible pump provided in the vicinity of the side wall in the water layer of the storage tank, and the water in the storage tank is rotated in a spiral shape by discharging the water in a substantially horizontal direction. Flyer.   The heater in the storage tank is sucked out of the storage tank by an oil pump provided outside the storage tank, and discharged from the oil supply port provided on the side wall of the storage tank in a substantially horizontal direction and in an eccentric direction. The fryer according to claim 1, wherein the lower oil layer is rotated in a spiral shape.   The oil in the oil layer is sucked by a pump in oil provided in the vicinity of the side wall in the lower part of the heater of the storage tank, and discharged in a substantially horizontal direction to rotate the oil in the storage tank in a spiral shape. Flyer.   The fryer according to claim 1, wherein the storage tank is formed in a conical shape or a pyramid shape with a bottom projecting downward.   The fryer according to claim 2 or 6, wherein oil in the oil layer is rotated around the heater by a spiral rotation of water in the water layer.   A filtration water tank having a filter is installed in the vicinity of the storage tank, the water in the water layer is sucked together with foreign matters such as fried debris from a water suction port provided at the center of the bottom of the storage tank, and the suctioned water is sucked into the filtration water tank. In addition, the foreign matter such as fried residue is filtered through the filter and settled on the bottom of the filtered water tank, and the filtered water is substantially horizontal along the side wall of the tank from the water supply port provided on the side wall of the tank. The flyer according to any one of claims 1 to 3, wherein the flyer is returned to the water layer so as to flow into the water layer.

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