JPH0634755Y2 - Frying oil heating system - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a frying oil heating system for heating oil in a fryer used in the production of deep-fried food, tempura and the like.

(Prior Art) Conventionally, various types of this type of system have been proposed, and generally, there are a direct heating type and an indirect heating type in which heating is indirectly performed via a heat exchanger. Broadly divided.

For example, as the former system, there are a direct fire system in which an oil pan is directly heated by a heater such as a burner, and a system in which frying oil is introduced into a boiler to directly heat the oil. As a system,
In addition to introducing the fly oil to the heat exchanger, the high temperature steam or heat medium oil from the steam boiler or heat medium boiler is introduced to this heat exchanger, and heat is exchanged between the two in the heat exchanger, so that the fly oil is indirectly Some have been designed to be heated.

(Problems to be solved by the invention) However, in the case of the direct heating type, since the oil heating temperature is high, the oil is easily oxidized and deteriorated at a high temperature, and the oil life is shortened. Moreover, it is difficult to adjust the frying oil temperature. Particularly, in the case of the direct fire type, there is a possibility that a fire may occur and the working environment may be deteriorated.

In addition, the indirect heating type requires piping between the boiler and the heat exchanger, so that the entire system becomes large in size, a large installation space is required, and the heating efficiency of the frying oil is low. is there. Particularly, in the case of using a steam boiler, the boiler water treatment is required, and it is necessary to provide a drain recovery device or the like, which complicates the system structure. Further, in the case of using the heat medium boiler, there is a possibility that toxic heat medium oil may be mixed in the fly oil. Generally, in order to prevent such mixing, it seems that a heating plate coil through which a heat medium oil is passed is attached under the oil pan, but this arrangement causes a significant decrease in heat transfer efficiency.

An object of the present invention is to solve all the problems in the conventional system and to provide a frying oil heating system capable of heating the frying oil satisfactorily.

(Means for Solving Problems) In order to achieve the above-mentioned object, the frying oil heating system of the present invention has a heat exchange chamber in which a heat transfer tube is installed and a steam generation chamber in which heat transfer water is stored. A frying oil heating device comprising a series of airtight chambers and a heating medium water heater for heating the heating medium water in the steam generation chamber to generate steam, a fryer, a strainer, and a circulation pump. A heated oil introduction pipe line leading to the inlet end of the heat transfer pipe,
A heating oil supply pipeline extending from the other end outlet of the heat transfer tube to a fryer, a fly oil heating temperature control device for controlling the heat transfer water heater based on the oil temperature at the outlet side of the heat transfer tube, and the both And a pumping oil temperature control device for controlling the amount of bypass oil to the bypass pipeline based on the oil temperature of the fryer.

(Function) When steam is generated in the steam generation chamber by the heat transfer water heater, the steam exchanges heat with the fly oil in the heat transfer tube in the heat exchange chamber to heat it. Heated frying oil
It is supplied from the heat transfer tube to the fryer via the heating oil supply pipeline, and is circulated from the fryer to the heat transfer tube via the heated oil introducing pipeline. This raises the oil temperature in the fryer. At this time, the oil heating temperature in the heat exchange chamber is suppressed below the critical temperature at which the oil deteriorates by controlling the heat transfer water heater, for example, by ON-OFF control, and deterioration of the fryer oil is prevented.

On the other hand, the steam condensed and liquefied by the heat exchange with the frying oil is returned as heat transfer water from the heat exchange chamber to the steam generation chamber communicating with the heat exchange chamber. In this way, since the gas-liquid change of the heat transfer water is repeated in the airtight chamber, it is not necessary to provide a drain recovery device or the like, and no water supply treatment is required. Moreover, since the heat exchange chamber and the steam generation chamber are configured as a series of airtight chambers, scale adhesion and oxidative corrosion do not occur in the fly oil heating device, the device life is improved, and maintenance is easy. Become. Further, since the steam generating section and the heat exchanging section are integrated, the thermal efficiency is good and it is easy to follow the load fluctuation.

Then, when the oil temperature of the fryer, that is, the frying oil temperature approaches or reaches the preset temperature, the frying oil temperature control device causes a part or all of the frying oil heated in the heat exchange chamber to flow from the heating oil supply pipeline. Bypassed to the bypass line to prevent the oil temperature from rising too high. The amount of bypass oil to the bypass line is controlled based on the oil temperature of the fryer, and the oil temperature of the fryer is adjusted and maintained at a predetermined frying oil temperature. Further, when the frying oil temperature becomes lower than the set value due to the addition of the processed food or the like, the bypass to the bypass pipe line is stopped and the frying oil temperature is raised. At this time, since the oil bypassed to the bypass pipe is circulated from the heated oil introduction pipe to the heat transfer pipe and is not cooled,
The oil temperature in the fryer can be raised immediately by stopping the bypass of the oil. In this way, the responsiveness to the load is extremely good, and the oil temperature of the fryer can be controlled satisfactorily and accurately.

(Embodiment) The configuration of the present invention will be specifically described below based on each embodiment shown in FIGS. 1 and 2.

FIG. 1 is a system diagram showing a first embodiment. In FIG. 1, 1 is a fryer, 2 is a frying oil heating device, 3 is a heated oil introduction pipe line from the fryer 1 to the frying oil heating device 2, Reference numeral 4 is a heating oil supply pipe line from the frying oil heating device 2 to the fryer 1, 5 is a frying oil heating temperature control device, and 6 is a frying oil temperature control device.

Fryer 1 is an appropriate frying oil 1a that can be stored in it.
The conveyor 7 for transferring the processed food passing through the inside is attached.

The frying oil heating device 2 has a main body 2a having a structure similar to that of a known fire tube smoke tube type boiler, and includes a burner 9 as a heating medium water heater in a steam generating chamber 8 for storing the heating medium water 8a. And a main body 2a in which a smoke tube (not shown) connected to the furnace tube 10 and the furnace tube 10 are arranged, and a communication tube in the upper part of the steam generation chamber 8
The heat exchange chamber 12 and the heat transfer tubes 13 arranged in the heat exchange chamber 12 are connected in series. Both rooms 8 and 12 are connected
It is composed of a series of airtight chambers that are communicated via 11 ... Therefore, according to the fly oil heating device 2, the oil in the heat transfer tube 13 is heated by the steam generated in the steam generating chamber 8. The frying oil heating device 2
In that case, the both chambers 8 and 12 may be integrated into a decompression chamber.

The heated oil introduction pipe line 3 has one end connected to the processed food feeding side portion of the fryer 1 and the other end which is the heat transfer pipe 13.
Is connected to the inlet 13a at one end thereof, and a strainer 14 for removing sludge and a circulation pump 15 are interposed.
In addition, a strainer type is used as the strainer 14,
Air contact with the flash is minimized to prevent oxidative deterioration of the oil.

The heating oil supply pipe line 4 has one end connected to the other end outlet portion 13b of the heat transfer pipe 13 and the other end connected to the processed food takeout side portion of the fryer 1.

The frying oil heating temperature control device 6 includes an outlet 13 of the heat transfer tube 13.
Heating temperature detector 16 that detects the oil temperature on the b side
And the burner 9 based on the temperature detected by the detector 16.
It is composed of a controller 17 for ON / OFF control, and is devised to heat the fly oil in the heat exchange chamber 12 within a temperature range where it does not deteriorate. The burner 9 may be proportionally controlled if necessary.

The frying oil temperature control device 6 connects the both pipe lines 3 and 4 to the fryer 1
A bypass pipe line 18 that is in communication with each other, a pumping oil temperature detector 19 that detects the oil temperature in the fryer 1, and a three-way control valve 20 that is arranged at the connection point between the heating oil supply pipe line 4 and the bypass pipe line 18. And a controller 21 for controlling the three-way control valve 20 based on the temperature detected by the pumping oil temperature detector 19. According to the oil frying temperature control device 6, the three-way control valve
20 to control the heating oil supply line 4 to the bypass line
By adjusting the amount of bypass oil to 18 the oil temperature in the fryer 1 can be maintained within a predetermined temperature range.

In the system configured as described above, the frying oil 1a is heated by heat exchange with the steam in the heat exchanger chamber 12, and is supplied from the heat transfer tube 13 to the fryer 1 via the heating oil supply conduit 4. Then, it is circulated from the fryer 1 to the heat transfer pipe 13 through the heated oil introducing pipe line 3. At this time, the oil heating temperature is suppressed below the critical temperature at which the oil deteriorates by the combustion control of the burner 9, and the deterioration of the fly oil is prevented.

On the other hand, the steam condensed and liquefied by the heat exchange with the frying oil is returned from the heat exchange chamber 12 to the steam generation chamber 8 via the communication tubes 11. Therefore, it is not necessary to provide a drain recovery device or the like, and no water supply treatment is required. Moreover, since both chambers 8 and 12 are airtight chambers, scale adhesion and oxidative corrosion do not occur, and it is easy to follow load fluctuations.

When the oil temperature of the fryer 1 approaches or reaches the preset temperature, the frying oil temperature detector 19 detects this and the three-way control valve 20 is controlled to heat part or all of the frying oil. Oil supply line 4
Is bypassed to the bypass line 18. This allows the oil temperature of the fryer to be adjusted within the specified frying temperature range.
Maintained. The oil bypassed to the bypass pipe 18 is circulated from the heated oil introduction pipe 3 to the heat transfer pipe 13 and is provided as a supply heat source when the oil pumping temperature is lowered without being lowered in temperature. Therefore, when the oil frying temperature is lowered, the bypass to the bypass line 18 is stopped and the heating oil from the heat transfer tube 13 is supplied to the fryer 1, whereby the oil temperature of the fryer can be immediately raised, and the load can be increased. Respond quickly to.

By the way, when the food to be processed contains a large amount of water, for example, when manufacturing tempura, there is a risk that water and oil will be violently scattered and the clothes may burst. In such a case, if the food to be processed is preheated to some extent and then is subjected to the frying treatment, good frying processing can be performed without causing the inconvenience.

Therefore, in the second embodiment shown in FIG. 2, the temperature zone of the oil in the fryer 1 can be divided into the low temperature pumping zone 22a and the high temperature pumping zone 22b to preheat the processed food to some extent in the low temperature pumping zone 22a. After that, it is devised so that the final pumping process can be performed in the high temperature pumping zone 22b.

That is, the fryer 1 side portion of the heated oil introducing pipe line 3 is connected to the low temperature pumping zone 22a of the fryer 1 and the high temperature pumping zone 22b of the fryer 1 is connected.
And a high temperature pumping oil which is connected to the second introduction pipeline part 3b and is connected to the low temperature pumping zone 22a at the fryer 1 side part of the heating oil supply pipeline 4. Second supply line section 4 connected to zone 22b
It is branched into b and. Also, the first introduction conduit portion 3
a and the first supply pipeline portion 4a and the second introduction pipeline portion 3b and the second supply pipeline portion 4b are connected by first and second bypass pipeline portions 18a and 18b, respectively. There is. Further, a first portion is provided on the side of the fryer 1 with respect to the connection portion of the bypass pipeline portions 18a, 18b in the supply pipeline portions 4a, 4b.
And the second zone pumps 23a, 23b are interposed, and between the first introduction pipeline portion 3a and the first supply pipeline portion 4a and the second introduction pipeline on the suction port side of each zone pump 23a, 23b. The portion 3b and the second supply pipeline portion 4b are communicated with each other by the first and second zone forming pipelines 24a and 24b, respectively. Also, the first and second three-way control valves 20a, 20b are respectively installed at the connection points between the supply pipe line portions 4a, 4b and the bypass portions 18a, 18b, and the temperatures of the zones 22a, 21b are detected. The first and second pumping oil temperature detectors 19a and 19b are provided, and the first and second controllers 21 are provided.
With a and 21b, the amount of bypass oil to the control valves 20a and 20b, and thus to the bypass pipe line portions 18a and 18b, is adjusted to the zones 22a and 22b.
It is controlled separately based on the temperature. In this embodiment, a pair of strainers 14, 14 are arranged in parallel so that sludge can be easily removed during operation.

Therefore, in such a system, oil heating and temperature adjustment similar to those in the first embodiment are performed,
Further, an oil circulation path is formed from the introduction pipe line portions 4a, 4b to the zone pumps 23a, 23b through the fryer 1 and the zone forming pipe lines 24a, 24b, and the respective oil pumping zones 22a, 22b are respectively partitioned and maintained at predetermined temperatures. . It goes without saying that the two oil pumping zones 22a and 22b may be physically partitioned by partition walls.

(Effect of the Invention) As can be easily understood from the above description, according to the frying oil heating system of the present invention, safety and working environment can be improved, and oil deterioration can be prevented as much as possible. As a result, the oil life can be significantly improved. Moreover, the drain recovery device is not required and the piping can be simplified,
The entire system can be made compact and simple, and installation and maintenance are easy. Furthermore, it is possible to quickly respond to load changes, efficiently and accurately adjust / maintain the frying oil temperature, and obtain a processed food of high quality.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a frying oil heating system according to the present invention, and FIG. 2 is a schematic sectional view showing another embodiment. 1 ... Fryer, 1a ... Fly oil, 2 ... Fly oil heating device, 3 ... Heating oil introduction pipe line, 3a, 3b
…… Introduction line part, 4 …… Heating oil supply line, 4a, 4b
...... Supply pipeline part, 5 ...... Fry oil heating temperature control device, 6 …… Frying oil temperature control device, 8 …… Steam generation chamber, 8a…
Heat transfer water, 9 Burner (heat transfer water heater), 11 Communication tube, 12 Heat exchange chamber, 13 Heat transfer tube, 13a Heat transfer tube inlet, 13b Heat transfer tube outlet Department, 14 ... Strainer, 15 ...
… Circulation pump, 16,19,19a, 19b …… Temperature detector, 17,21,2
1a, 21b …… Controller, 18 …… Bypass line, 18a, 18b ……
Bypass pipe section, 20,20a, 20b …… Three-way control valve, 22a, 22
b …… pumping zone, 23a, 23b …… zone pump, 24a, 24b
...... Zone forming pipeline.

Claims (3)

[Scope of utility model registration request] 1. A heat exchange chamber containing a heat transfer tube and a steam generation chamber for storing heat transfer water are provided in a series of upper and lower airtight chambers, and the heat transfer water in the steam generation chamber is heated to generate steam. A frying oil heating device provided with a heat transfer water heater to be generated, a heated oil introduction pipe line extending from a fryer through a strainer and a circulation pump to one inlet port of the heat transfer pipe, and another outlet port of the heat transfer pipe. To a fryer, a heating oil supply pipe line, a fly oil heating temperature control device for controlling the heat transfer water heater based on the oil temperature at the outlet side of the heat transfer pipe, and a bypass connecting the two pipe lines for communication. A frying oil heating system comprising: a frying oil temperature control device that has a pipe line and controls the amount of bypass oil to the bypass pipe line based on the oil temperature of the fryer. 2. The heated oil introduction pipe line has a fryer side portion connected to a low temperature oil frying zone of the fryer and a second introduction pipe line portion connected to a high temperature oil frying zone of the fryer. It is a branch configuration of and
The heating oil supply pipe line has a fryer side portion branched into a first supply pipe line portion connected to the low temperature oil pumping zone and a second supply pipe line portion connected to the high temperature oil pumping zone. A first and a second pipe connecting the first introduction pipe line portion and the first supply pipe line portion and the second introduction pipe line portion and the second supply pipe line portion, respectively; The frying oil heating system according to claim 1, characterized in that it comprises a second bypass line portion. 3. The first and second zone pumps, wherein the pumping oil temperature control device is provided on a fryer side portion from a connection portion of each bypass pipeline portion in each of the supply pipeline portions, and each of the zone pumps. First and second zone forming pipelines that communicate between the first introduction pipeline section and the first supply pipeline section and between the second introduction pipeline section and the second supply pipeline section on the suction port side, respectively. 3. The utility model registration claim 2 further comprising: controlling the amount of bypass oil to each of the bypass pipe line portions on the basis of the oil temperature in each pumping zone. The frying oil heating system described in.