JPH0123128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cooking device for producing fried food using a hot liquid such as heated oil.

(Prior Art) Conventionally, in the production of fried foods, fryers have been proposed that use a pot or the like and heat only the bottom of the pot, and fryers that have heat transfer tubes installed horizontally in a hot liquid tank.

(Problems to be Solved by the Invention) When using the above conventional pot, etc., only the bottom of the pot is heated and not all of the combustion gas is involved in heating the cooking liquid in the pot, so the thermal efficiency is extremely low. bad. In addition, it is said that in the above-mentioned fryer, the thermal efficiency cannot be increased that much because the firebox is located outside the hot liquid tank and the combustion gas passing through the heat transfer tube is subjected to fluid frictional resistance. There was a problem.

In view of the above-mentioned conventional drawbacks, the present invention aims to provide a cooking device with high thermal efficiency.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a hot liquid tank that stores a hot liquid for cooking and has an open upper part, and both ends thereof communicate with the lower and upper parts of the hot liquid tank, respectively. a circulation pipe for circulating the hot liquid, a circulation pump interposed in the circulation path of the hot liquid by the circulation pipe, a firebox disposed at a lower part of the circulation pipe, and combustion gas generated in the firebox. a heat exchange part through which the combustion gas passes through and gives the heat of the combustion gas to the hot liquid in the circulation pipe; The cooking appliance is characterized in that it is equipped with a gas conduit that leads to the circulation pipe on the side that communicates with the gas circulation pipe.

(Function) According to the cooking device of the present invention, when the food to be cooked is thrown into the hot liquid tank containing the hot liquid for cooking from the open upper side, the hot liquid absorbs heat by the food to be cooked. As the temperature decreases and the specific gravity increases, the combustion gas flows out into the circulation pipe connected to the bottom of the hot liquid tank, and the combustion gas generated in the firebox located at the bottom of the circulation pipe whose one end is connected to the top of the hot liquid tank. The heat is received in the heat exchanger, the temperature rises, the specific gravity becomes small, the liquid rises in the circulation pipe, flows into the hot liquid tank from the upper part of the hot liquid tank, and is circulated.

On the other hand, the combustion gas generated in the firebox passes through the heat exchange section and is then guided through the gas conduit to the circulation pipe connected to the upper part of the hot liquid tank, where it imparts heat to the hot liquid in the circulation pipe. At the same time, the heat is introduced to the outer periphery of the hot liquid tank to keep the hot liquid tank warm, and the heat is effectively utilized.

(Example) Examples of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a cooking appliance according to the present invention.

In the cooking device, a hot liquid 2 such as heated oil for cooking is stored in a hot liquid tank 1 which is open at the top. Liquid 2 is circulating. In addition, the cooking device generates combustion gas in a firebox 5 disposed at the lower part of the circulation pipe 3, and when the combustion gas passes through the heat exchange section 6, it gives heat to the hot liquid, and further supplies it to the circulation pump 7. Therefore, the circulating speed of the hot liquid is increased, impurities in the hot liquid are separated and removed in the impurity separation section 8, and suspended impurities such as fried slag on the surface of the hot liquid are removed in the impurity receiver 9, thereby maintaining the quality of the hot liquid. As a result, the exhausted hot liquid is replenished from the replenishment liquid tank 10. Then, the cooking device guides the combustion gas after passing through the heat exchange section 6 to the outer periphery of the riser pipe 3b through the gas conduit 11, and further blows it out to the upper surface of the hot liquid, and the hot liquid tank 1.
The hot liquid 2 is kept warm by being guided to the outer periphery of the hot liquid 2. The components other than the replenishment liquid tank 10 are housed in a common casing 12, and the whole can be easily moved together with the replenishment liquid tank 10 attached to the side of the casing 12 using casters 13 provided at the lower end of the casing 12. ing.

The hot liquid tank 1 has a funnel-shaped cross section and consists of a bottom plate 1a and a side plate 1b.
Both ends of the circulation pipe 3 are connected to the upper part of the
A cooker receiving screen 14 is provided inside the connection between the bottom plate 1a and the downcomer pipe 3a.

The circulation pipe 3 is a descending pipe 3a that guides the hot liquid 2 downward.
, an ascending pipe 3b that guides the hot liquid upward, and a descending pipe 3a.
and a communication pipe 3c whose both ends are respectively connected to the lower part of the riser pipe 3b.

The riser pipe 3a has an impurity separation section 8 at its lower part for separating slag-like impurities mixed in the hot liquid. This impurity separation section 8 includes a downcomer pipe 3a.
The filter cylinder 8a is bulged at the lower end of the filter cylinder 8a.
It has a filter 8b arranged inside the filter cylinder 8.
A continuous drain tank 15 is connected to the lower end of a. Then, the impurities separated from the hot liquid by the filter 8b are separated into solids and liquids in the drain tank 15 using gravity, and only the solids are mainly discharged from the drain tank 15 to the outside, and the liquid is recovered. It's summery.

The rising pipe 3b has an upper end bent sideways,
It is connected to the upper part of the side plate 1b of the hot liquid tank 1.

The communication pipe 3c has one end connected to the filter cylinder 8a and the other end connected to the lower end of the rising pipe 3b, and the circulation pump 7
and a heat exchange section 6 are interposed, and this heat exchange section 6
In this case, the firebox 5 is expanded to surround the firebox 5.

The firebox 5 is sealed from the outside, the upper part is housed in the communication pipe 3c, the forced draft burner 16 is attached to the lower end facing upward, and a plurality of hot liquid pipes 6a are connected to the upper part of the combustion gas. Heat exchange portions 6 are formed to extend through and in parallel along the direction perpendicular to the flow.
The gas conduit 11 connected to the upper end of the heat exchange section 6 includes a bent conduit 11a extending below the riser pipe 3b, a vertical conduit 11b containing the riser pipe 3b, and a horizontal conduit 11c branched from the vertical conduit 11b. ing. The vertical conduit 11b has a lower end connected to the bent conduit 11a, and an upper end bent sideways to form an outlet 11 that is directed along the upper surface of the hot liquid 2 in the hot liquid tank 1 toward the impurity receiver 9.
d, and is equipped with a damper 17 that can be opened and closed inside. The horizontal conduit 11c branches from the vertical conduit 11b below the damper 17, passes below the bottom plate 1a of the hot liquid tank 1, and connects to the insulating chamber 18 near the downcomer pipe 3a.

The blower ports 11d are arranged at a plurality of locations around the hot liquid tank 1 at predetermined intervals.

The greenhouse 18 has a partition plate 18a that connects the casing 12.
The interior is partitioned below the bottom plate 1a, and the bottom plate 1 of the hot liquid tank 1 is
It is formed on the upper side including the side plate 1a and the side plate 1b, and the combustion gas is transferred to the hot liquid tank 1 through the horizontal conduit 11c.
The hot liquid 2 in the hot liquid tank 1 is kept warm.

The impurity receiver 9 is a divided basket or a plurality of baskets arranged along the inner surface of the side plate 1b of the hot liquid tank 1 corresponding to the upper surface of the hot fluid 2, and the impurity receiver 9a is located at the upper end of the vertical conduit 11b. It is directed toward the air outlet 11d.

The replenishment liquid tank 10 has a float 10a inside, and a liquid supply pipe 19 is connected to the lower part via a needle valve 10b, and the tip of this liquid supply pipe 19 penetrates the side of the descending pipe 3a. There is.

Then, the hot liquid adheres to food etc. and is carried away, or is carried away together with impurities discharged from the drain tank 15, and the hot liquid 2 in the hot liquid tank 1 decreases, and the pressure acting on the lower surface of the needle valve 10b decreases. When the force that pulls the needle valve 10b downward becomes greater than the buoyant force of the float 10a, the replenishment liquid flows from the hole formed in the lower end surface of the replenishment liquid tank 10 through the liquid supply pipe 19 to the descending pipe 3.
The replenishing liquid flows downward into the hot liquid tank 1 and is replenished until the hot liquid level in the hot liquid tank 1 reaches a predetermined height.

Next, the operation and usage method of the cooking device according to the above configuration of the present invention will be explained.

When the burner 16 is ignited, the combustion gas generated in the firebox 5 consists of nitrogen, nitrogen dioxide, and some air, and due to its buoyancy, it heats the hot liquid while passing through the heat exchanger 6 and folds it. It reaches the lower end of the vertical conduit 11b through the curved conduit 11a, and after giving heat to the hot liquid in the rising pipe 3b while rising in the vertical conduit 11b, it flows from the outlet 11d along the upper surface of the hot liquid to the impurity receiver 9. It blows impurities such as fried slag floating on the liquid surface into the impurity receiver 9, and also covers the top surface of the hot liquid to prevent heat radiation from the surface of the hot liquid and deterioration due to oxidation of the hot liquid.

A part of the combustion gas enters into the insulating chamber 18 through the horizontal conduit 11c, is guided to the entire outer circumference of the hot liquid tank 1, and keeps the hot liquid 2 warm.

When the food to be cooked is added from above, the hot liquid 2 in the hot liquid tank 1 decreases in temperature and increases in specific gravity, descends in the downcomer pipe 3a, and passes through the filter 8b in the impurity separation section 8. Impurities are separated and removed, and the connecting pipe 3c
In the heat exchange section 6 through the circulation pump 7, the temperature increases by receiving heat from the combustion gas, and the specific gravity becomes small.
It further rises in the riser pipe 3b while receiving heat from the combustion gas, and flows into the hot liquid tank 1 from the upper end of the riser pipe 3b. That is, the hot liquid 2 is circulated at high speed through the circulation pipe 3 by forced circulation by the pump 7 in addition to convection due to the temperature rise in the heat exchange section 6 and riser pipe 3, and is maintained at a predetermined temperature or higher.

The impurity receiver 9 consisting of a split basket or a plurality of baskets is
Floating impurities such as dregs blown in by the combustion gas blown out from the blow-off port 11d are sequentially taken out manually or by a take-out device (not shown).

When hot liquid 2 is consumed and reduced, replenishment liquid tank 1
Replenishment liquid is automatically supplied downward into the downcomer pipe 3a from 0 through the needle valve 10b and the liquid supply pipe 19, and the amount of hot liquid in the hot liquid tank 1 is always maintained at an optimum level.

According to the above embodiment of the present invention, the hot liquid 2 is forcibly circulated at high speed using the pump 7 in addition to convection, so there is an advantage that impurities can be sufficiently separated and removed by the filter 8b. The heat exchange section 6 has good heat exchange performance because the plurality of hot liquid pipes 6a are arranged in parallel along the direction perpendicular to the flow of combustion gas. Note that the mounting position of the heat exchanger 6 can be changed appropriately.

(Effects of the Invention) The present invention is configured as described above, and includes a hot liquid tank containing a hot liquid, a circulation pipe whose both ends communicate with the lower and upper parts of the hot liquid tank and which circulate the hot liquid, and a circulation pipe that circulates the hot liquid. Combustion gas generated in the firebox located at the bottom of the circulation pipe passes through a circulation pump interposed in the circulation path of the hot liquid through the pipe, and the heat of the combustion gas is transferred to the hot liquid in the circulation pipe. By providing a heat exchange section that provides heat exchange, the hot liquid in the hot liquid tank is always stably and smoothly circulated and maintained at a predetermined temperature or higher, and the combustion gas that has passed through the heat exchange section is transferred to the hot liquid tank. By guiding the hot liquid into the circulation pipe on the side that communicates with the outer periphery and the upper part of the hot liquid tank, the hot liquid in the hot liquid tank is reliably kept warm, the heat of the combustion gas is used effectively, and the overall thermal efficiency is improved. It has effects such as being able to provide a high quality cooking device.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a cooking appliance according to an embodiment of the present invention. 1... Hot liquid tank, 1a... Bottom plate, 1b... Side plate,
2... Hot liquid, 3... Circulation pipe, 3a... Descending pipe, 3
b...Rising pipe, 3c...Connecting pipe, 5...Firebox, 6
... Heat exchange section, 6a ... Hot liquid pipe, 7 ... Pump,
8... Impurity separation section, 8a... Filter cylinder, 8b...
Filter, 9... Impurity receiver, 9a... Socket, 10... Replenishment tank, 10a... Float, 10b... Needle valve, 11... Gas conduit, 11a... Bent conduit, 11b... Vertical conduit, 1
1c... Horizontal conduit, 11d... Outlet, 12... Casing, 13... Caster, 14... Cooked product receiving screen, 15... Drain pot, 16...
Burner, 17... Damper, 18... Warming room, 1
8a... Partition plate, 19... Liquid supply pipe.

Claims (1)

[Claims] 1. A hot liquid tank that accommodates a hot liquid for cooking and is open at the top, a circulation pipe whose both ends communicate with the lower and upper parts of the hot liquid tank and circulates the hot liquid, and a circulation path for the hot liquid through the circulation pipe. a circulation pump interposed therein, a firebox disposed at the lower part of the circulation pipe, and a combustion gas generated in the firebox passing through the inside, giving heat of the combustion gas to the hot liquid in the circulation pipe. It is characterized by comprising an exchange part and a gas conduit that guides the combustion gas after passing through the heat exchange part to the circulation pipe on the side communicating with the outer periphery of the hot liquid tank and the upper part of the hot liquid tank. Cooking device.