Oil vapor recovery device during pressure relief of pressure fryer

Abstract

The invention discloses an oil vapor recovery device during pressure relief of a pressure fryer, which comprises an oil vapor pressure relief valve mounted on a pot body of the pressure fryer and an oil vapor collection box for collecting oil vapor discharged by the oil vapor pressure relief valve, a cooling pipe used for reducing the oil-steam temperature and separating oil-water mixture is further arranged between the oil-steam pressure relief valve and the oil-steam collecting box, the steam inlet end of the cooling pipe is connected with a steam outlet of the oil-steam pressure relief valve, and the steam outlet end of the cooling pipe is connected with a steam inlet of the oil-steam collecting box. The oil-water mixture is stored in the oil-gas collecting box, the pressure frying machine can pressurize the pot body of the frying machine through the booster pump according to a set pressure value, after a cooking and frying task is completed, the pressure of the pot body needs to be relieved through the pressure relief device in order to ensure safety, during pressure relief, high-temperature oil gas contains more oil molecules, and in order to avoid waste and protect the environment, the oil-water mixture is stored in the oil-gas collecting box. The oil gas recovery device capable of collecting the oil gas is adopted, and the recovered oil gas is converted into a liquid state to be recycled.

Description

Technical Field

[0001] The invention relates to a pressure frying device, in particular to an oil vapor recovery device generated during a pressure relief operation after completing a frying task. Background Art

[0002] As a highly efficient food frying device, a deep fryer creates a high-temperature environment to fry ingredients, thereby improving the frying efficiency and the taste of fried food. Currently, there is a type of deep fryer on the market that fries ingredients in a closed cavity. As the temperature rises, the pressure in the cavity will increase (slightly greater than the standard atmospheric pressure), but it is also very important to ensure that the air pressure in the cavity is within a safe range and how to deal with the oil vapor discharged when the pressure is released after cooking is completed.

[0003] The deep fryer of the prior art usually achieves the purpose of pressure relief on the pot body by installing an electromagnetic pressure relief valve or a manual pressure relief valve, and the oil vapor discharged from the pot body during pressure relief is directly discharged to the outside for treatment. Since a large amount of cooking oil is required for frying food in a high temperature environment, the gas discharged after pressure relief contains a large amount of recyclable oil molecules. If it is directly discharged to the outside, it will not only waste but also pollute the environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an oil vapor recovery device for a pressure fryer during pressure relief, which can effectively recover high-pressure oil vapor in a fryer pot after the pressure fryer completes the frying task.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] Provided is an oil vapor recovery device for pressure relief of a pressure fryer, comprising an oil vapor pressure relief valve mounted on a pot body of the pressure fryer and an oil vapor collection box for collecting oil vapor discharged by the oil vapor pressure relief valve. A cooling pipe for reducing the temperature of the oil vapor and separating an oil-water mixture is further provided between the oil vapor pressure relief valve and the oil vapor collection box. The steam inlet end of the cooling pipe is connected to the steam outlet of the oil vapor pressure relief valve, and the steam outlet end of the cooling pipe is connected to the steam inlet of the oil vapor collection box. The oil-water mixture is stored in the oil vapor collection box.

[0007] Furthermore, an exhaust pipe is provided on the top cover of the oil vapor collection box, which extends upward and is used to discharge a small amount of oil smoke gas in the oil vapor collection box that has not condensed into an oil-water mixture into the atmosphere. The inlet of the exhaust pipe is connected to the oil vapor collection box, and the outlet thereof is located outside the fryer.

[0008] Furthermore, the cooling pipe is a cooling coil.

[0009] Furthermore, the oil and gas pressure relief valve is an electric ball valve controlled by the main control circuit of the fryer.

[0010] Furthermore, the oil vapor collection box discharges the oil-water mixture therein into the frying oil reserve tank through a drain pipe.

[0011] The present invention discloses a pressure fryer, which can increase the pressure in the fryer pot through a booster pump according to a set pressure value. The pressure in the pot is relatively high during frying. After the frying task is completed, the pot body needs to be depressurized through a pressure relief device to ensure safety. During the pressure relief, the high-temperature oil vapor contains a large amount of oil molecules. In order to avoid waste and protect the environment, the present invention adopts an oil vapor recovery device that can collect the oil vapor and convert the recovered oil vapor into liquid for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional view of the pressure fryer provided by the present invention;

[0013] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 The diagram is a schematic diagram of an oil vapor recovery device in a pressure fryer provided by the present invention.

[0015] Reference numerals: pot body 1, pot cover 2, frying basket 3, steam outlet pipe 41, steam inlet 411, three-way joint 412, pressure sensor 413, steam pipe 414, oil and steam pressure relief valve 415, cooling pipe 416, oil and steam collection box 417, exhaust pipe 418, drain pipe 419, cooking oil reserve box 5, oil pipeline 6, heavy hammer pressure relief valve 7, pressure relief pipe 8 DETAILED DESCRIPTION

[0016] The oil vapor recovery device of the present invention is a device for recovering high-pressure oil vapor (oil vapor: a mixture of oil fume, water vapor and air) discharged from a pot body 1 of a pressure fryer (hereinafter referred to as a fryer) when the fryer completes frying and releases pressure. After being processed by the oil vapor recovery device, most of the oil vapor becomes a mixture of oil droplets and water droplets (hereinafter referred to as an oil-water mixture), which can be recycled and reused, while the only small amount of unliquefied oil fume gas is discharged outside the pressure fryer, thereby effectively reducing the waste of frying oil, saving costs, and at the same time reducing the emission of oil fume gas, reducing pollution, and being more environmentally friendly.

[0017] The fryer is a device for frying food by generating a high-temperature and high-pressure environment, and comprises a frame, the pot body 1 mounted on the frame, a pot cover 2, a frying basket 3 and the oil vapor recovery device.

[0018] 1. Pot body 1

[0019] The pot body 1 is arranged in the rear area of the frame, and is used to hold cooking oil for frying food (the present invention defines the names of oils used in different operation processes as follows: the oil first added to the pot body 1 for frying food is called cooking oil, and the oil that has entered the frying stage is called cooking oil).

[0020] The pot body 1 is a rectangular structure with an open top. The preferred method for heating the pot body 1 is magnetic heating (a magnetic heating coil is wrapped around the outer wall of the pot body 1) or electric heating (a heating tube is arranged around the outer wall of the pot body 1 or an electric heating plate is arranged at the bottom of the pot body 1).

[0021] 2. Pot cover 2 and frying basket 3

[0022] The pot cover 2 is arranged just above the pot body 1 by a lifting mechanism. Driven by the lifting mechanism, the pot cover 2 can move straight upward to the pot mouth away from the pot body 1, or move downward to cover the pot mouth. A sealing ring is provided between the pot cover 2 and the pot body 1 to form a closed cooking space in the pot body 1.

[0023] The frying basket 3 is detachably mounted below the pot cover 2. The frying basket 3 is used to hold food to be fried and is moved downward synchronously with the pot cover 2, so that the food in the frying basket 3 is completely immersed in the cooking oil in the pot body 1. When the food in the pot body 1 is fried and the pot body 1 is depressurized by the oil vapor recovery device, the lifting mechanism can drive the pot cover 2 to move up with the frying basket 3 to open the pot mouth, so that the operator can take out the fried food in the frying basket 3, which is safe and very convenient.

[0024] 3. Oil vapor recovery device

[0025] The oil vapor recovery device includes an oil vapor pressure relief valve 415 , a cooling pipe 416 and an oil vapor collection box 417 .

[0026] 1) Oil and gas pressure relief valve 415

[0027] The oil and gas pressure relief valve 415 is electrically connected to the main control circuit of the fryer, and is preferably an electric ball valve.

[0028] The oil and gas pressure relief valve 415 is arranged at the rear of the pot body 1, and a steam outlet pipe 4 is connected to the upper part of the rear side wall of the pot body 1. The steam inlet 411 of the steam outlet pipe 4 is communicated with the pot body 1, and the steam outlet of the steam outlet pipe 4 is connected to the inlet end of the three-way joint 412. The two outlet ends of the three-way joint 412 are respectively distributed on the left and right sides of the inlet end. A pressure sensor 413 is installed on the left outlet end, and the right outlet end is connected to the steam inlet of the oil and gas pressure relief valve 415 arranged below it through the steam pipe 414. The steam outlet of the oil and gas pressure relief valve 415 is connected to the steam inlet end of the cooling pipe 416.

[0029] When the pot body 1 completes frying the food in the pot, the oil vapor pressure relief valve 415 opens, and the oil vapor in the pot body 1 is discharged from the steam outlet pipe 4 and discharged into the steam pipe 414 and the cooling pipe 416 from top to bottom. After the pressure relief is completed, the pot cover 2 can be raised.

[0030] Preferably, a weight pressure relief valve 7 is connected between the steam outlet pipe 4 and the steam passage pipe 414, and located above the top shell of the fryer. The pressure relief outlet of the weight pressure relief valve 7 is connected to the oil and vapor collection tank 417 via a pressure relief pipe 8. The steam inlet of the pressure relief pipe 8 is connected to the pressure relief outlet. The lower end of the pressure relief pipe 8 extends downward, and the steam outlet is connected to the top cover of the oil and vapor collection tank 417. During the frying process, if the air pressure in the pot body 1 exceeds the set pressure of the weight pressure relief valve 7, the weight pressure relief valve 7 automatically opens.

[0031] 2) Cooling pipe 416

[0032] The cooling pipe 416 is located between the oil vapor pressure relief valve 415 and the oil vapor collecting box 417. The steam inlet end arranged at the upper end of the cooling pipe 416 is connected to the steam outlet of the oil vapor pressure relief valve 415, and the steam outlet end arranged at the lower end of the cooling pipe 416 is connected to the steam inlet arranged on the top cover of the oil vapor collecting box 417.

[0033] The cooling pipe 416 is used to cool the oil vapor discharged therein so that the oil vapor is condensed and liquefied into an oil-water mixture, and then flows into the oil vapor collecting box 417 through the vapor inlet.

[0034] The cooling tube 416 preferably has a cylindrical and spiral cooling coil. This setting can effectively increase the flow path of the oil vapor, thereby increasing the cooling time of the oil vapor in the disc cooling tube 416, so that the oil vapor has sufficient time to be converted into the oil-water mixture.

[0035] 3) Oil vapor collection box 417

[0036] The oil vapor collection box 417 is a hollow rectangular body, which is used to store and collect the oil-water mixture for recycling and reuse.

[0037] Preferably, in order to discharge a small amount of oil smoke gas that has not formed oil droplets after being cooled by the cooling pipe 416, an exhaust pipe 418 is further provided on the oil vapor collection box 417, the lower end of the exhaust pipe 418 is connected to the top cover of the oil vapor collection box 417, and the inlet of the exhaust pipe 418 is connected to the oil vapor collection box 417; the upper end of the exhaust pipe 418 extends upward and passes through the top shell of the fryer, that is, its outlet is located outside the fryer, and the oil smoke gas entering the oil vapor collection box 417 is discharged to the outside of the fryer through the inlet.

[0038] Preferably, a drain pipe 419 is provided on the bottom plate of the oil vapor collecting box 417 , and the oil-water mixture can flow into the frying oil reserve tank 5 through the drain pipe 419 .

[0039] An oil delivery pipe 6 for pumping the reserve oil in the frying oil standby tank 5 back into the pot body 1 is provided on the side wall of the frying oil standby tank 5 at a position slightly higher than the tank bottom.

Claims

1. An oil vapor recovery device for a pressure fryer during pressure relief, comprising an oil vapor pressure relief valve mounted on a pressure fryer pot and an oil vapor collection box for collecting the oil vapor discharged by the oil vapor pressure relief valve, characterized in that: A cooling pipe for reducing the oil vapor temperature and separating the oil-water mixture is also provided between the oil vapor pressure relief valve and the oil vapor collection tank. The steam inlet end of the cooling pipe is connected to the steam outlet of the oil vapor pressure relief valve, and the steam outlet end of the cooling pipe is connected to the steam inlet of the oil vapor collection tank. The oil-water mixture is stored in the oil vapor collection tank.

2. The oil vapor recovery device for a pressure fryer during pressure relief according to claim 1, characterized in that: An exhaust pipe is provided on the top cover of the oil vapor collection box, which extends upward and is used to discharge a small amount of oil smoke gas in the oil vapor collection box that has not condensed into an oil-water mixture into the atmosphere. The inlet of the exhaust pipe is connected to the oil vapor collection box, and the outlet is located outside the fryer.

3. The oil vapor recovery device for a pressure fryer during pressure relief according to claim 2, characterized in that: The cooling pipe is a cooling coil.

4. The oil vapor recovery device for a pressure fryer during pressure relief according to claim 3, characterized in that: The oil and gas pressure relief valve is an electric ball valve controlled by the main control circuit of the fryer.

5. The oil vapor recovery device for a pressure fryer during pressure relief according to claim 4, characterized in that: The oil-water mixture in the oil vapor collecting box is discharged into the frying oil standby tank through a drain pipe.

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