Cooling device for preparing zanthoxylum oil with spiral cooling tube

Abstract

This application discloses a cooling device for preparing Sichuan pepper oil with spiral cooling pipes, comprising a first cooling box and a second cooling box arranged vertically. The first cooling box controls the entry of Sichuan pepper oil through a Sichuan pepper oil inlet on the rear side of its top surface and a first valve. Its inner bottom surface has a transition channel and a first cooling assembly, which includes multiple spiral cooling pipes arranged in a "⌒" shape. Coolant circulation cooling is achieved through a distribution box, a collection box, and corresponding coolant inlet / outlet pipes and valves. The second cooling box is supported by a support base and has an arched groove at its bottom. A Sichuan pepper oil outlet and a fourth valve are located at its rear end. An internal cooling cylinder constitutes the second cooling assembly. The outer periphery of the cooling cylinder has heat exchange fins, and the interior contains a third cooling assembly, including second spiral cooling pipes, corresponding coolant inlet / outlet pipes and valves. A breather valve is also located at the rear end of the cooling cylinder. This device can effectively perform staged cooling of Sichuan pepper oil, improving cooling efficiency and effectiveness.

Description

Technical Field

[0001] This utility model relates to the field of pepper oil preparation technology, specifically to a pepper oil preparation cooling device with a spiral cooling pipe. Background Technology

[0002] Sichuan pepper oil is a seasoning oil extracted from Sichuan pepper as the main raw material. It has a rich numbing and fragrant flavor and is an indispensable seasoning in local specialties such as Sichuan, Yunnan and Shaanxi cuisines. It is widely used in cooking scenarios such as cold dishes, hot pot, and stir-fries, and can significantly enhance the flavor of dishes.

[0003] Existing pepper oil cooling devices have low cooling efficiency, typically relying on simple cooling structures that cannot quickly cool freshly prepared high-temperature pepper oil to a suitable temperature, thus affecting production efficiency. For example, some traditional cooling devices are slow to cool pepper oil with an initial temperature of approximately 120-180℃, which cannot meet the needs of large-scale production. Utility Model Content

[0004] To address the aforementioned technical problems, this application solves the problem that existing pepper oil cooling devices have low cooling efficiency, typically relying on simple cooling structures, which cannot quickly cool freshly prepared high-temperature pepper oil to a suitable temperature, thus affecting production efficiency.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a cooling device for preparing Sichuan pepper oil with a spiral cooling pipe, including a first cooling box, a second cooling box arranged below the first cooling box, a Sichuan pepper oil inlet arranged on the rear side of the top surface of the first cooling box, a first valve arranged on the top of the Sichuan pepper oil inlet, a transition channel arranged on the inner bottom surface of the first cooling box, and a first cooling component arranged inside the first cooling box.

[0006] The transition channel extends vertically downward to the inner peripheral wall of the second cooling box and is connected thereto. A support base is provided on the lower outer peripheral wall of the second cooling box. An arched groove is provided on the bottom surface of the support base. A pepper oil outlet extending vertically downward into the arched groove is provided on the inner peripheral wall of the rear end of the second cooling box. A fourth valve is provided at the end of the pepper oil outlet. A second cooling component is provided inside the second cooling box.

[0007] To better realize this utility model, the first cooling assembly further includes a plurality of first spiral cooling pipes disposed inside the first cooling box. One end of all the first spiral cooling pipes extends out of the front end face of the first cooling box and is connected to the distribution box. A first coolant inlet pipe is disposed at the middle position of the front end face of the distribution box. A second valve is disposed at the outer end of the first coolant inlet pipe. The other end of all the first spiral cooling pipes extends out of the rear end face of the first cooling box and is connected to the collection box. A first coolant outlet pipe is disposed at the middle position of the rear end face of the collection box. A third valve is disposed at the outer end of the first coolant outlet pipe.

[0008] To better realize this utility model, the first spiral cooling pipe is further configured as three, arranged in a "⌒" shape along the front and rear sides.

[0009] To better realize this utility model, the inner bottom surface of the first cooling box is further shaped as a semi-circular arc.

[0010] To better realize this utility model, the transition channels are further provided in multiple forms, evenly distributed on the inner bottom surface of the first cooling box.

[0011] To better realize this utility model, the second cooling component further includes a cooling cylinder disposed inside the second cooling box, with its two ends extending out of the front and rear end faces of the second cooling box respectively. A plurality of heat exchange fins are disposed on the outer peripheral wall of the cooling cylinder inside the second cooling box. A third cooling component is disposed inside the cooling cylinder. A third coolant output pipe is disposed on the upper outer peripheral wall of the front end of the cooling cylinder. A seventh valve is disposed at the top of the third coolant output pipe. A third coolant input pipe is disposed on the lower outer peripheral wall of the rear end of the cooling cylinder. An eighth valve is disposed at the bottom of the third coolant input pipe.

[0012] To better realize this utility model, the third cooling component further includes a second spiral cooling pipe, which is disposed inside the cooling cylinder. The second coolant inlet pipe at the front end of the second spiral cooling pipe extends out of the front end face of the cooling cylinder and is provided with a fifth valve. The second coolant outlet pipe at the rear end of the second spiral cooling pipe extends out of the rear end face of the cooling cylinder and is provided with a second coolant outlet pipe.

[0013] To better realize this utility model, a breather valve is further provided on the upper outer peripheral wall of the rear end of the cooling cylinder.

[0014] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0015] 1. This utility model features a staged cooling design that significantly improves cooling efficiency. Through the cooperation of a first cooling tank and a second cooling tank, the high-temperature pepper oil is initially cooled by the first cooling component, and then further cooled by the second cooling component. Taking pepper oil with an initial temperature of 150℃ as an example, traditional single cooling devices may take a long time to cool it to 30-50℃, while this device can significantly shorten the cooling time, meeting the cooling efficiency requirements of large-scale production.

[0016] 2. This utility model achieves uniform cooling through the arrangement of spiral cooling pipes and the coordinated operation of multiple components. The first spiral cooling pipe is arranged in a "⌒" shape along the front and rear sides, increasing the contact area with the pepper oil and allowing the coolant to more fully absorb the heat from the pepper oil, ensuring uniform cooling within the first cooling tank. In the second cooling assembly, the heat exchange fins on the outer periphery of the cooling cylinder and the second spiral cooling pipe inside simultaneously cool the pepper oil from both the inside and outside, further ensuring the uniformity of cooling and effectively improving the stability of the pepper oil's quality.

[0017] 3. This utility model and its device possess excellent adaptability and safety. The breather valve automatically regulates the pressure inside the cooling cylinder, preventing abnormal pressure due to temperature changes and ensuring safe operation. Furthermore, the parameter design and material selection of each component fully consider the high temperature and large temperature difference characteristics of Sichuan pepper oil. For example, the housing is made of 316 stainless steel, and the cooling cylinder is made of 304 stainless steel seamless tubing, enabling it to withstand long-term high-temperature cyclic conditions, reducing malfunctions caused by thermal expansion and contraction, and extending the device's service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a partial cross-sectional view of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the first cooling component in this utility model;

[0023] Figure 5 for Figure 4 Top view;

[0024] Figure 6 This is a schematic diagram of the structure of the second and third cooling components in this utility model;

[0025] Figure 7 for Figure 6 A partial sectional view.

[0026] Explanation of reference numerals in the attached diagram: 100-First cooling tank; 200-Second cooling tank; 300-Cooling cylinder; 101-Sichuan pepper oil inlet; 102-First valve; 103-Transition channel; 104-First spiral cooling pipe; 105-Diverter box; 106-First coolant inlet pipe; 107-Second valve; 108-Gathering box; 109-First coolant outlet pipe; 110-Third valve; 201-Support base; 202-Sichuan pepper oil outlet; 203-Fourth valve; 301-Heat exchange fin; 302-Second spiral cooling pipe; 303-Second coolant inlet pipe; 304-Fifth valve; 305-Second coolant outlet pipe; 306-Sixth valve; 307-Breath valve; 308-Third coolant outlet pipe; 309-Seventh valve; 310-Third coolant inlet pipe; 311-Eighth valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1 to 7 As shown, a cooling device for preparing Sichuan pepper oil with a spiral cooling pipe includes a first cooling box 100, a second cooling box 200 below the first cooling box 100, a Sichuan pepper oil inlet 101 on the rear side of the top surface of the first cooling box 100, a first valve 102 on the top of the Sichuan pepper oil inlet 101, a transition channel 103 on the inner bottom surface of the first cooling box 100, and a first cooling component inside the first cooling box 100.

[0035] The transition channel 103 extends vertically downward to and connects with the inner peripheral wall of the second cooling box 200. A support base 201 is provided on the lower outer peripheral wall of the second cooling box 200. An arched groove is provided on the bottom surface of the support base 201. A pepper oil outlet 202 extending vertically downward into the arched groove is provided on the inner peripheral wall of the rear end of the second cooling box 200. A fourth valve 203 is provided at the end of the pepper oil outlet 202. A second cooling component is provided inside the second cooling box 200.

[0036] like Figures 1 to 7 As shown, in this embodiment, the first cooling assembly includes a plurality of first spiral cooling pipes 104 disposed inside the first cooling box 100. One end of all the first spiral cooling pipes 104 extends out of the front end face of the first cooling box 100 and is connected to the distribution box 105. A first coolant inlet pipe 106 is disposed at the middle position of the front end face of the distribution box 105. A second valve 107 is disposed at the outer end of the first coolant inlet pipe 106. The other end of all the first spiral cooling pipes 104 extends out of the rear end face of the first cooling box 100 and is connected to the converging box 108. A first coolant outlet pipe 109 is disposed at the middle position of the rear end face of the converging box 108. A third valve 110 is disposed at the outer end of the first coolant outlet pipe 109.

[0037] like Figures 1 to 7 As shown, in this embodiment, there are three first spiral cooling pipes 104, arranged in a “⌒” shape along the front and rear sides.

[0038] like Figures 1 to 7 As shown, in this embodiment, the inner bottom surface of the first cooling box 100 is semi-circular.

[0039] like Figures 1 to 7 As shown, in this embodiment, there are multiple transition channels 103, which are evenly distributed on the inner bottom surface of the first cooling box 100.

[0040] like Figures 1 to 7 As shown, in this embodiment, the second cooling component includes a cooling cylinder 300, which is disposed inside the second cooling tank 200. Its two ends extend from the front and rear end faces of the second cooling tank 200, respectively. A plurality of heat exchange fins 301 are disposed on the outer peripheral wall of the cooling cylinder 300 inside the second cooling tank 200. A third cooling component is disposed inside the cooling cylinder 300. A third coolant output pipe 308 is disposed on the upper outer peripheral wall of the front end of the cooling cylinder 300. A seventh valve 309 is disposed at the top of the third coolant output pipe 308. A third coolant input pipe 310 is disposed on the lower outer peripheral wall of the rear end of the cooling cylinder 300. An eighth valve 311 is disposed at the bottom of the third coolant input pipe 310.

[0041] like Figures 1 to 7As shown, in this embodiment, the third cooling component includes a second spiral cooling pipe 302, which is disposed inside the cooling cylinder 300. A second coolant inlet pipe 303 at the front end of the second spiral cooling pipe 302 extends out of the front end face of the cooling cylinder 300 and is provided with a fifth valve 304. A second coolant outlet pipe 305 at the rear end of the second spiral cooling pipe 302 extends out of the rear end face of the cooling cylinder 300 and is provided with a second coolant outlet pipe 305.

[0042] like Figures 1 to 7 As shown, in this embodiment, a breather valve 307 is provided on the upper outer peripheral wall of the rear end of the cooling cylinder 300.

[0043] Working principle:

[0044] I. Working principle of the first cooling component

[0045] Component Composition and Connection: The first cooling component mainly consists of multiple first spiral cooling pipes 104 disposed inside the first cooling tank 100. One end of each of the first spiral cooling pipes 104 extends out of the front end face of the first cooling tank 100 and connects to the distribution box 105. A first coolant inlet pipe 106 is located at the middle of the front end face of the distribution box 105, and a second valve 107 is located at the outer end of the first coolant inlet pipe 106. The other end of each of the first spiral cooling pipes 104 extends out of the rear end face of the first cooling tank 100 and connects to the collecting box 108. A first coolant outlet pipe 109 is located at the middle of the rear end face of the collecting box 108, and a third valve 110 is located at the outer end of the first coolant outlet pipe 109. Furthermore, there are three first spiral cooling pipes 104 arranged in a "⌒" shape along the front-to-back direction, which increases the contact area with the pepper oil inside the tank.

[0046] Cooling Process: When cooling of the Sichuan pepper oil in the first cooling tank 100 is required, the second valve 107 is opened, and the coolant (usually low-temperature water or other cooling liquid) flows from the first coolant inlet pipe 106 into the distribution box 105. The distribution box 105 evenly distributes the coolant into each of the first spiral cooling pipes 104. Because the first spiral cooling pipes 104 are spiral-shaped and distributed along the front and back sides within the first cooling tank 100, the coolant can fully exchange heat with the surrounding Sichuan pepper oil during its flow within the pipes. The heat from the Sichuan pepper oil is transferred to the coolant, causing the temperature of the Sichuan pepper oil to gradually decrease. The coolant that has absorbed heat eventually converges into the collection box 108 and flows out through the first coolant outlet pipe 109, completing one cooling cycle. The bottom surface of the first cooling tank 100 is semi-circular, which helps the Sichuan pepper oil to better converge at the bottom under gravity and allows for more thorough contact between the first spiral cooling pipes 104 and the Sichuan pepper oil, further enhancing the cooling effect. Multiple transition channels 103 evenly distributed on the bottom surface of the first cooling box 100 allow the pepper oil, which has been initially cooled by the first cooling component, to flow more smoothly into the second cooling box 200 for further cooling.

[0047] II. Working principle of the second cooling component

[0048] Component Composition and Connection Relationship: The second cooling component includes a cooling cylinder 300 disposed within the second cooling tank 200, with its two ends extending from the front and rear end faces of the second cooling tank 200, respectively. Several heat exchange fins 301 are disposed on the outer peripheral wall of the cooling cylinder 300 inside the second cooling tank 200 to increase the heat dissipation area. A third cooling component is disposed inside the cooling cylinder 300, including a second spiral cooling pipe 302 disposed inside the cooling cylinder 300. A second coolant inlet pipe 303 at the front end of the second spiral cooling pipe 302 extends from the front end face of the cooling cylinder 300 and is equipped with a fifth valve 304; a second coolant outlet pipe 305 at the rear end extends from the rear end face of the cooling cylinder 300 and is equipped with a sixth valve 306. A third coolant outlet pipe 308 is provided on the upper outer peripheral wall of the front end of the cooling cylinder 300, and a seventh valve 309 is provided at the top of the third coolant outlet pipe 308; a third coolant inlet pipe 310 is provided on the lower outer peripheral wall of the rear end, and an eighth valve 311 is provided at the bottom of the third coolant inlet pipe 310. A breather valve 307 is also provided on the upper outer peripheral wall of the rear end of the cooling cylinder 300 to balance the pressure inside the cooling cylinder.

[0049] Cooling Process: The Sichuan pepper oil flowing from the first cooling tank 100 into the second cooling tank 200 via the transition channel 103 surrounds the outer periphery of the cooling cylinder 300. First, observe the cooling process inside the cooling cylinder 300: The fifth valve 304 is opened, allowing coolant to flow from the second coolant inlet pipe 303 into the second spiral cooling pipe 302. During its flow within the pipe, it absorbs heat from inside the cooling cylinder 300, providing initial cooling. The coolant then flows out from the second coolant outlet pipe 305. Simultaneously, the cooling medium (such as low-temperature water or air, depending on the actual design) within the second cooling tank 200 flows around the cooling cylinder 300, exchanging heat with the heat exchange fins 301 on the outer wall of the cooling cylinder 300. Heat from inside the cooling cylinder 300 is transferred to the cooling medium within the second cooling tank 200 through the heat exchange fins 301, further reducing the temperature of the cooling cylinder 300 and the internal Sichuan pepper oil. Additionally, when further accelerated cooling of the cooling cylinder 300 is required, the eighth valve 311 can be opened to allow coolant to flow from the third coolant inlet pipe 310 into the space between the cooling cylinder 300 and the second spiral cooling pipe 302. After absorbing heat, the coolant flows out from the third coolant outlet pipe 308. The breather valve 307 automatically opens or closes during the cooling process when the pressure inside the cooling cylinder 300 becomes abnormal due to temperature changes or other reasons, regulating the pressure to ensure a safe and stable cooling process. Finally, the pepper oil cooled by the second cooling component flows out through the pepper oil outlet 202, which extends vertically downwards into the arched groove on the inner circumferential wall at the rear end of the second cooling tank 200, and exits the device after the fourth valve 203 is opened, completing the entire cooling process.

[0050] Working principle of the third cooling component

[0051] The third cooling component is the core heat dissipation unit within the second cooling box 200, nested inside the cooling cylinder 300:

[0052] I. Core Components and Connection Logic

[0053] The third cooling component, with the second spiral cooling pipe 302 as its core, forms an independent coolant circulation system with supporting pipes and valves:

[0054] Input end: The front end of the second spiral cooling pipe 302 is connected to the second coolant input pipe 303, and the injection of coolant (such as low temperature water or special refrigerant) is controlled by the fifth valve 304.

[0055] Output end: The rear end of the second spiral cooling pipe 302 is connected to the second coolant output pipe 305, and the coolant after heat absorption is discharged through the sixth valve 306.

[0056] Auxiliary circulation interface: The annular space between the cooling cylinder 300 and the second spiral cooling pipe 302 forms an auxiliary coolant channel through the third coolant inlet pipe (310, equipped with the eighth valve 311) and the third coolant outlet pipe (308, equipped with the seventh valve 309).

[0057] Safety device: Breathing valve 307 at the top rear end of cooling cylinder 300 is used to balance pressure fluctuations (such as negative pressure or slight overpressure) caused by temperature changes during the cooling process.

[0058] II. Basic Cooling Cycle: Direct Heat Exchange within the Spiral Tube

[0059] Coolant injection: Open the fifth valve 304 and close the sixth valve 306. The coolant enters the second spiral cooling pipe 302 from the second coolant inlet pipe 303. The spiral structure prolongs the residence time of the coolant in the cooling cylinder 300 and increases the contact area with the surrounding Sichuan pepper oil (the outer wall of the spiral pipe is in direct contact with the Sichuan pepper oil).

[0060] Heat exchange process: The high-temperature pepper oil (after being initially cooled in the first cooling box, flows into the cooling cylinder) undergoes heat transfer with the wall of the second spiral cooling pipe 302. The heat is absorbed by the coolant flowing inside the pipe through the pipe wall, and the temperature of the pepper oil is further reduced.

[0061] Coolant discharge: After absorbing heat, the coolant flows backward along the spiral tube. Open the sixth valve 306 and discharge it to the external cooling system (such as a cooling tower) through the second coolant output pipe 305. After cooling, it can be recycled.

[0062] III. Auxiliary Cooling Cycle: Enhanced Heat Dissipation in the Circular Space

[0063] When the initial temperature of the Sichuan pepper oil is too high (e.g., exceeding the cooling capacity of the primary cooling tank) or requires rapid cooling, the auxiliary circulation enhances heat dissipation:

[0064] Auxiliary coolant injection: Open the eighth valve 311 and close the seventh valve 309. The auxiliary coolant enters from the third coolant inlet pipe 310 into the annular space between the cooling cylinder 300 and the second spiral cooling pipe 302, and wraps around the outer wall of the second spiral cooling pipe.

[0065] Dual heat exchange mechanism:

[0066] The auxiliary coolant in the annular space directly absorbs the heat from the pepper oil inside the cooling cylinder 300 (heat transfer through the inner wall of the cooling cylinder);

[0067] At the same time, it exchanges heat with the outer wall of the second spiral cooling pipe 302, further absorbing the residual heat that the coolant inside the pipe has not completely carried away.

[0068] Auxiliary coolant discharge: The auxiliary coolant, after absorbing heat, is discharged from the third coolant output pipe 308 (the seventh valve 309 needs to be opened), and is then combined with the main circulating coolant for unified treatment.

[0069] IV. Pressure Balance: The Synergistic Effect of the Breathing Valve

[0070] During the cooling process, temperature changes in the pepper oil and coolant may cause pressure fluctuations within the cooling cylinder 300.

[0071] Negative pressure scenario: When the pepper oil cools down and shrinks rapidly or the coolant flow is too large, causing a sudden drop in local temperature, the pressure inside the cooling cylinder is lower than atmospheric pressure. The breather valve 307 will automatically open to draw in external air (or inert gas) to balance the pressure and prevent the cooling cylinder from being sucked flat.

[0072] Slight overpressure scenario: If the auxiliary coolant circulation flow rate is too large, or the pepper oil is not sufficiently cooled in some areas, causing volume expansion, the breather valve 307 reduces the pressure by venting, preventing the cooling cylinder seals from failing or the pipeline from bursting.

[0073] V. Collaboration with other components

[0074] The third cooling component does not operate independently, but forms a three-stage cooling chain with the first cooling tank 100 and the second cooling tank 200 (the overall cooling flow direction of the second and third cooling components is opposite, determined by the input and output directions).

[0075] The Sichuan pepper oil is first cooled by the first spiral cooling pipe 104 of the first cooling box;

[0076] The cooling cylinder 300 then flows into the second cooling box and is deeply cooled through the dual circulation (inside the spiral tube + in the annular space) of the third cooling component;

[0077] The cooled pepper oil is discharged through the pepper oil outlet (202, equipped with the fourth valve 203), completing the entire cooling process.

[0078] Through this "progressive cooling + dual circulation enhancement" design, the third cooling component can stably control the temperature of the pepper oil within the process requirements range (such as room temperature or a specific low temperature range), while ensuring the safe operation of the system through the breather valve.

[0079] The temperature of Sichuan pepper oil is typically high before entering the cooling device after preparation, with an initial temperature of approximately 120-180℃ (depending on the pressing or extraction process). After passing through the first and second cooling components, it needs to be reduced to 30-50℃ (room temperature or the low temperature range required by the process), resulting in a temperature difference of 90-150℃. This drastic temperature change causes thermal expansion and contraction of parts, necessitating targeted design of part parameters, selection of suitable materials, and optimization of the sealing structure, as detailed below:

[0080] 1. First cooling tank 100 and second cooling tank 200

[0081] Working environment: Directly in contact with high-temperature pepper oil at 120-180℃, and at the same time, there is a temperature difference with coolant (such as cold water) at 5-25℃. It needs to withstand high temperature, oil corrosion and temperature fluctuation.

[0082] Material selection: 316 stainless steel (06Cr17Ni 12Mo2) is preferred due to its performance advantages as follows:

[0083] High temperature resistance: Long-term operating temperature can reach 200℃, short-term temperature can withstand 250℃, completely covering the initial temperature of Sichuan pepper oil;

[0084] Corrosion resistance: Contains 2%-3% molybdenum, which can resist corrosion from oils, volatile components (such as peppermint) in pepper oil, and trace impurities in coolant;

[0085] The coefficient of linear expansion is moderate (16.0 × 10⁻⁶). -6 / ℃), the expansion and contraction is controllable under a temperature difference of 150℃ (the expansion and contraction of 1 meter length is about 2.4mm), making it suitable as a rigid structure for box-type enclosures.

[0086] Alternative: If cost is a constraint, 304 stainless steel (18Cr-8Ni) can be used, but the operating temperature must be controlled to ≤150℃ (long-term), and the inner wall should be checked regularly for localized corrosion caused by grease adhesion.

[0087] 2. Cooling cylinder 300

[0088] Working environment: The internal circulation is of pepper oil that has been preliminarily cooled (temperature approximately 80-120℃), while the external contact is with the coolant in the second cooling tank (5-25℃). It needs to balance thermal conductivity and resistance to temperature stress.

[0089] Material selection: 304 stainless steel seamless pipe (wall thickness 3-5mm) is used. Its advantages are:

[0090] It has a high thermal conductivity (16.2 W / (m·K)), which is better than 316 stainless steel, and can quickly transfer the heat of the pepper oil to the external coolant.

[0091] It has stable mechanical properties, and its yield strength remains above 200MPa in the 80-120℃ range, which can resist the internal stress generated by thermal expansion and contraction.

[0092] The inner wall is smooth (Ra≤1.6μm), which reduces local overheating caused by pepper oil residue and reduces the temperature fluctuation range.

[0093] II. Parameter design of key components (adapting to temperature differences of 120-180℃)

[0094] 1. Spiral cooling pipe (104 / 302)

[0095] Pipe diameter and wall thickness:

[0096] First spiral cooling pipe (104, in contact with 120-180℃ pepper oil): 316 stainless steel pipe with φ16×2.5mm (outer diameter 16mm, wall thickness 2.5mm) is selected. The wall thickness is increased by 0.5mm compared with the normal temperature design to offset the strength loss at high temperature (the strength of 316 stainless steel decreases by about 15% at 180℃).

[0097] The second spiral cooling pipe (302, in contact with 80-120℃ pepper oil): φ12×2mm 304 stainless steel pipe is selected. The pipe diameter is reduced to increase the contact density with the cooling cylinder, and the wall thickness meets the strength requirements in the medium temperature range.

[0098] Helical parameters:

[0099] The pitch is designed to be 3-4 times the pipe diameter (e.g., 50mm pitch for φ16mm pipe) to allow for thermal expansion: a 1-meter long spiral pipe will elongate by about 1.8mm at a temperature difference of 150℃. The pitch gap can accommodate this expansion and contraction, preventing the spiral pipes from being squeezed and deformed.

[0100] The radius of curvature of the spiral should be ≥ 8 times the pipe diameter (e.g., the radius of curvature of a φ16mm pipe should be ≥ 128mm) to reduce stress concentration at the bending point and prevent fatigue fracture at high temperatures.

[0101] 2. Transition channel 103 and pepper oil outlet 202

[0102] Cross-sectional dimensions: The inner diameter of the channel is designed to be 20-30mm, and a tapered structure is adopted (the diameter at the inlet end is 5% larger than that at the outlet end). For example, the inner diameter of 103 gradually decreases from 30mm to 28.5mm from the first cooling box 100 to the second cooling box 200, to compensate for the radial expansion of the channel under high temperature (the radial expansion rate of 316 stainless steel is about 0.24% under a temperature difference of 150℃), and to avoid obstruction of the flow of pepper oil.

[0103] Wall thickness: The wall thickness of the transition channel is ≥5mm (2mm more than the wall thickness of the box body). Since the channel is the part with the most drastic temperature changes (one end is connected to 120-180℃ oil, and the other end is connected to 80-120℃ oil), it is necessary to reduce thermal stress by increasing the wall thickness.

[0104] 3. Valves and interface components (such as 102 / 203 / 304 stainless steel, etc.)

[0105] Valve core and seat: The sealing surface is made of Stellite alloy weld overlay. This material still has a hardness of HRC40-45 at 180℃ and its wear resistance is more than 3 times that of stainless steel. It can resist the erosion and wear of high-temperature pepper oil.

[0106] Valve stem diameter: 10% thicker than the normal temperature design (e.g., the conventional φ10mm valve stem is increased to φ11mm) to offset elastic deformation at high temperatures (the valve stem deflection is reduced by about 15% at 180℃), ensuring reliable valve opening and closing sealing.

[0107] III. Sealing Design at Connections (Leak Prevention Measures for Temperature Differences of 120-180℃)

[0108] 1. Connection between the first cooling box 100 and the pepper oil inlet 101

[0109] Sealing structure: It adopts a combination of "flange + metal-clad gasket". The flange is designed with raised face (raised face height 3mm, concave face depth 3.2mm) and a 0.2mm gap is reserved to accommodate the thermal expansion of the gasket.

[0110] Sealing material: The gasket is made of stainless steel coated expanded graphite (1.5mm thick). The graphite layer expands by 30% at 180℃, which can fill the micro gaps caused by temperature changes on the flange surface. The stainless steel coating prevents the graphite from being washed away by the high temperature pepper oil.

[0111] 2. Connection between cooling cylinder 300 and second cooling box 200

[0112] Flexible sealing: A metal bellows compensator (50mm long, ±8mm compensation) is used, with flanges at both ends connecting to 300 and 200. The bellows is made of 316 stainless steel, which can absorb the axial expansion and contraction of the cooling cylinder under a temperature difference of 150℃ (a 1-meter-long cooling cylinder expands and contracts by about 1.8mm), avoiding misalignment of the sealing surface caused by rigid connection;

[0113] Auxiliary sealing: A perfluoroether rubber (FFKM) O-ring (5mm cross-section diameter) is installed inside the bellows. It has a temperature resistance of up to 300℃ and retains more than 80% of its elasticity at 180℃, which can compensate for the small gaps in the bellows seal.

[0114] 3. Connection between the spiral cooling pipe and the distribution box 105 / converging box 108

[0115] Welding + sealant reinforcement: The end of the spiral tube and the interface of the distributor box are argon arc welded (weld height ≥ 3mm), and then annealed after welding (temperature 800℃, heat preservation for 1 hour) to eliminate welding stress;

[0116] Apply high-temperature sealant (such as Dow Corning 737, temperature resistance -65-315℃) to the outside of the weld to form an elastic sealing layer, covering any micro-cracks that may exist in the weld and preventing the penetration of high-temperature grease.

[0117] 4. Connection between breather valve 307 and cooling cylinder 300

[0118] Sealing surface design: The valve seat adopts a conical structure (taper 1:10) and is matched with a silicone rubber sealing gasket (hardness Shore A 60±5). The conical surface can automatically center when the pressure fluctuates, ensuring that the sealing gasket is evenly stressed.

[0119] Preload control: The connecting bolts are selected as grade 8.8 high-strength bolts, and the preload torque is increased by 20% compared with the normal temperature design (e.g., the preload torque of M10 bolts is increased from 30 N·m to 36 N·m) to prevent the seal failure caused by bolt loosening at high temperature.

[0120] The core design logic for Sichuan pepper oil, considering its initial high temperature of 120-180℃ and temperature difference range of 90-150℃, is as follows:

[0121] Material priority: 316 stainless steel is used for the 100 and 200 series enclosures to resist high temperature corrosion, 304 stainless steel is used for the 300 series cooling cylinder to balance thermal conductivity and strength, and the spiral tube is selected according to the temperature range: 316 (high temperature range) or 304 (medium temperature range).

[0122] Parameter adaptation: By increasing the wall thickness, enlarging the pitch clearance, and designing a tapered channel, the thermal expansion and contraction of the parts can be accommodated;

[0123] Enhanced sealing: Metal compensators are used to absorb expansion and contraction, and high-temperature sealing materials (perfluoroether rubber, expanded graphite) are used to resist temperature fluctuations, ensuring no leakage at any connection.

[0124] Through the above design, the leakage of the device can be controlled below 0.01 mL / h under long-term high-temperature cyclic conditions (such as continuous operation for 8 hours a day), meeting the safety requirements of food-grade equipment.

[0125] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cooling device for preparing Sichuan pepper oil with a spiral cooling pipe, characterized in that: The system includes a first cooling box (100), a second cooling box (200) is provided below the first cooling box (100), a pepper oil inlet (101) is provided on the rear side of the top surface of the first cooling box (100), a first valve (102) is provided on the top of the pepper oil inlet (101), a transition channel (103) is provided on the inner bottom surface of the first cooling box (100), and a first cooling component is provided inside the first cooling box (100). The transition channel (103) extends vertically downward to the inner peripheral wall of the second cooling box (200) and is connected thereto. A support base (201) is provided on the lower outer peripheral wall of the second cooling box (200). An arched groove is provided on the bottom surface of the support base (201). A pepper oil outlet (202) extending vertically downward into the arched groove is provided on the inner peripheral wall of the rear end of the second cooling box (200). A fourth valve (203) is provided at the end of the pepper oil outlet (202). A second cooling component is provided inside the second cooling box (200).

2. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 1, characterized in that: The first cooling assembly includes a plurality of first spiral cooling pipes (104) disposed inside the first cooling box (100). One end of each of the first spiral cooling pipes (104) extends out of the front end face of the first cooling box (100) and is connected to the distribution box (105). A first coolant inlet pipe (106) is disposed at the middle position of the front end face of the distribution box (105). A second valve (107) is disposed at the outer end of the first coolant inlet pipe (106). The other end of each of the first spiral cooling pipes (104) extends out of the rear end face of the first cooling box (100) and is connected to the converging box (108). A first coolant outlet pipe (109) is disposed at the middle position of the rear end face of the converging box (108). A third valve (110) is disposed at the outer end of the first coolant outlet pipe (109).

3. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 2, characterized in that: There are three first spiral cooling pipes (104), which are arranged in a "⌒" shape along the front and rear sides.

4. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 1 or 2, characterized in that: The inner bottom surface of the first cooling box (100) is semi-circular.

5. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 1 or 2, characterized in that: The transition channels (103) are multiple and are evenly distributed on the inner bottom surface of the first cooling box (100).

6. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 1 or 2, characterized in that: The second cooling assembly includes a cooling cylinder (300), which is disposed inside the second cooling tank (200). Its two ends extend from the front and rear end faces of the second cooling tank (200), respectively. A plurality of heat exchange fins (301) are disposed on the outer peripheral wall of the cooling cylinder (300) inside the second cooling tank (200). A third cooling assembly is disposed inside the cooling cylinder (300). A third coolant output pipe (308) is disposed on the upper outer peripheral wall of the front end of the cooling cylinder (300). A seventh valve (309) is disposed at the top of the third coolant output pipe (308). A third coolant input pipe (310) is disposed on the lower outer peripheral wall of the rear end of the cooling cylinder (300). An eighth valve (311) is disposed at the bottom of the third coolant input pipe (310).

7. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 6, characterized in that: The third cooling component includes a second spiral cooling pipe (302), which is disposed inside the cooling cylinder (300). A second coolant inlet pipe (303) at the front end of the second spiral cooling pipe (302) extends out of the front end face of the cooling cylinder (300) and is provided with a fifth valve (304). A second coolant outlet pipe (305) at the rear end of the second spiral cooling pipe (302) extends out of the rear end face of the cooling cylinder (300) and is provided with a second coolant outlet pipe (305).

8. The cooling device for preparing Sichuan pepper oil with a spiral cooling pipe according to claim 6, characterized in that: A breather valve (307) is provided on the upper outer peripheral wall of the rear end of the cooling cylinder (300).

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