JP7357339B2 - Waste oil collection container and waste oil collection method - Google Patents

Description

The present invention relates to a waste oil recovery container and a waste oil recovery method for recovering used cooking oil, that is, waste oil.

Most of the waste oil discharged from the kitchens of restaurants, eateries, schools, hospitals, etc., and stores such as delicatessen stores and convenience stores is used in deep-frying machines called fryers. The waste oil is contained in the oil tank of the fryer and is drained out through the oil drain valve at the bottom of the tank. Specifically, by opening the oil drain valve, waste oil falls under its own weight and is received in a handle-equipped waste oil container below the fryer. Employees at restaurants, etc., lift the handle of the waste oil container with one hand, push up the bottom with the other hand, tilt the container, and pour the waste oil into a pail or synthetic resin carrying bag.

At this time, it is sufficient to use sufficiently cooled waste oil, but in order to do this, for example, if the fryer has been used during the day, the heating must be stopped and the oil must be left overnight. The cooking oil in use (which later becomes waste oil) is at a high temperature of around 170°C to 200°C, so some businesses cannot wait overnight for it to cool down, and others have to operate it at night, such as in convenience stores. Currently, the waste oil that is extracted remains at a high temperature.

Under these circumstances, work manuals and other documents stipulate how to handle high-temperature waste oil, but accidents still occur in which workers suffer burns due to carelessness. If you wait until it cools down, you can prevent burns, but as mentioned above, it is difficult to take the time to cool down the waste oil.

The following techniques are available for cooling edible oil in containers. What Patent Document 1 shows is a cooling device for preventing overheating of a deep fryer. This device is equipped with a water tank that comes into thermal contact with the cooking oil inside or outside the cooking oil contained in the deep fryer. The heated water is configured to circulate within the aquarium. Water is placed in the tank, and the water comes into contact with the cooking oil in the deep fryer, which continues to heat up, to prevent overheating and maintain an appropriate temperature.

The next technology is to partially cool the high-temperature cooking oil in the oil tank (container) of a fryer. The purpose of this is to create a temperature difference in the cooking oil to cause convection within the oil tank and to prevent frying residue from settling on the bottom of the oil tank. The technique described in Patent Document 2 uses air cooling, and the techniques described in Patent Documents 3 and 4 use a water cooling jacket and a water tank to cool the edible oil in the oil tank.

Patent Document 5 discloses a technique that uses the stored thermal energy of high-temperature waste oil received by a waste oil recovery container from an oil tank of a fryer to heat newly used cooking oil. The waste oil recovery container containing the hot waste oil is arranged in thermal contact with the fresh oil storage tank containing the new cooking oil, and the thermal contact is configured to transfer thermal energy stored in the waste oil to the new cooking oil. . If we look at this technology with a focus on waste oil, it can be seen as a technology that cools the high-temperature waste oil in the waste oil collection container with new edible oil.

Patent Document 6 discloses a waste oil collection container that is placed under an oil tank of a fryer and receives waste oil discharged from the oil tank. This waste oil recovery container is provided with a valve for pouring out the waste oil stored therein to the outside of the container.

Utility Model Publication No. 2-18347 Utility Model Publication No. 58-154736 Patent No. 5901624 Patent No. 6252810 Patent No. 3923381 Utility model registration No. 3220359

However, none of Patent Documents 1 to 6 includes the technical idea of cooling the received waste oil by pouring cooling fluid over it. As will be described later, continuous cooling is a highly effective cooling method despite its simple structure. It does not include disclosure or suggestion of its technical ideas. Therefore, with the techniques described in Patent Documents 1 to 6, it is not possible to effectively cool the high-temperature waste oil received from the oil tank of a fryer, thereby ensuring the safety of waste oil workers who handle the waste oil.

In other words, the prior art described in Patent Document 1 is related to a deep fryer in the first place and has nothing to do with a container for handling waste oil, and as mentioned in the Background Art section, the prior art described in Patent Document 1 is related to a deep fryer and is not related to a container for handling waste oil. The purpose is to prevent this and maintain an appropriate temperature, and it is not intended to cool the waste oil in the waste oil collection container. That is why it is sufficient to use water stored in a water tank that can be placed on top of a deep fryer, and does not use the cooling liquid method described later.

As mentioned in the Background Art section, the prior art described in Patent Documents 2 to 4 partially cools the cooking oil in the oil tank of a fryer, and is a technology that can be used to cool waste oil in a waste oil collection container. isn't it. Patent Document 5 shows a technical idea for cooling high-temperature waste oil, but new edible oil is used for cooling, and since this edible oil will be used later, the idea was to use a cooling liquid that will be described later. There is no motivation to do so. Although Patent Document 6 relates to a waste oil recovery container, it does not indicate the technical idea of waste oil cooling.

Therefore, the problem to be solved by the present invention is to effectively cool high-temperature waste oil received from the oil tank of a fryer, thereby ensuring the safety of workers who handle the waste oil. The means to solve this problem will be explained in the next section. Note that the definitions of terms used in explaining any claimed invention shall be applied to other claimed inventions to the extent possible due to their nature, regardless of the order of description or the category of the invention. shall be

(Features of the invention claimed in claim 1)
The waste oil recovery container according to the invention as claimed in claim 1 (hereinafter referred to as "container of claim 1" as appropriate) is a waste oil collection container installed under a fryer having an oil tank for storing edible oil. Here, the waste oil recovery container includes a container body that receives cooking oil discharged as high-temperature waste oil from the oil tank, and a cooling liquid tank that stores a cooling liquid, and the container body has a bottom and a periphery of the bottom. The cooling liquid tank has an outer wall and is arranged inside or outside of the side wall to bring the high temperature waste oil and the cooling liquid into thermal contact through at least a portion of the outer wall. It is characterized by being configured so that it is possible to do so. The temperature of waste oil rises to about 200 degrees Celsius, so any type of coolant can be used as long as it can withstand this temperature. A heat exchange structure for cooling the coolant may be separately provided as necessary.

According to the container of the first aspect, the waste oil collection container receives high-temperature waste oil from the oil tank of the fryer and stores it in the space formed by the bottom and the side wall. The thermal energy of the stored high-temperature waste oil is transferred to the cooling liquid that comes into thermal contact with the cooling liquid tank through at least a portion of the outer wall of the cooling liquid tank due to the temperature gradient. That is, the high temperature waste oil is cooled by the cooling fluid. Cooling lowers the temperature of the waste oil, which reduces the risk of burns for workers working with the waste oil, and improves work efficiency, reducing work time.

(Features of the invention claimed in claim 2)
The waste oil recovery container according to the invention according to claim 2 (hereinafter referred to as "container according to claim 2" as appropriate) is the container according to claim 1, wherein the cooling liquid tank is a cooling liquid supplied from a cooling liquid supply source. It is provided with an injection structure (coolant inlet) for injecting liquid, and a discharge structure (coolant outlet) for discharging the coolant injected by the injection structure in a flowing manner. Features. Full-flow means that new coolant is injected into the coolant tank from the injection structure, and the injected amount of coolant overflows from the discharge structure to the outside of the coolant tank. In other words, the amount of coolant in the coolant tank is It means that the amount does not change.

According to the container of the second aspect, by pouring the coolant supplied from the coolant supply source, the coolant that is in thermal contact with the waste oil is continuously replaced, so that the temperature of the coolant is difficult to rise. In other words, at one moment, the coolant whose temperature has increased due to heat absorption moves, and at the next moment, new coolant comes and absorbs heat, so a large temperature gradient is always maintained between the high temperature waste oil and the coolant. . Therefore, heat transfer is likely to occur, and therefore efficient waste oil cooling becomes possible.

(Features of the invention claimed in claim 3)
The waste oil recovery container according to the invention according to claim 3 (hereinafter referred to as "container according to claim 3") is the container according to claim 2, in which the cooling liquid tank is arranged inside the side wall part (i.e., , at least a portion of the cooling liquid tank is immersed in high-temperature waste oil), an input/output structure is formed in which the injection structure and the discharge structure are integrated, and the input/output structure is connected to a through hole provided in the side wall. It is characterized by being watertightly connected. An input/output structure in which an injection structure and a discharge structure are integrated refers to a structure similar to, for example, the opening of a cup when water is poured into the cup and overflows.

According to claim 3, by disposing the cooling liquid tank inside the side wall portion, preferably most or all of the cooling liquid tank can be fully immersed in the high-temperature waste oil. This means that even if the cooling liquid tank is the same, the contact area between the high-temperature waste oil and the outer wall becomes larger than when the cooling liquid tank is placed outside the side wall. The larger the size, the higher the cooling efficiency.

(Features of the invention claimed in claim 4)
The waste oil recovery container according to the invention set forth in claim 4 (hereinafter referred to as "container according to claim 4") is the container according to claim 3, wherein the cooling liquid tank has a bottom at one end and an open end at the other end. It has a substantially inverted L-shape including a cylindrical body and an inner elbow having one end watertightly connected to the opening of the cylindrical body and the other end watertightly connected to the through hole, and the input/output structure is connected to the through hole. It is characterized in that it is constituted by an opening of the inner elbow that faces the elbow. In this case, it is preferable that the bottom of the cylinder be as close as possible to the bottom of the container body. This is to increase the cooling efficiency of the entire waste oil by cooling the high temperature waste oil near the bottom and causing convection.

According to claim 4, by connecting the connecting structure to the through hole, at least a part or all of the cylindrical body is immersed in the inner elbow high temperature waste oil as the case may be, and the inner side facing the through hole is immersed in the inner elbow high temperature waste oil. Cooling water enters and exits through the elbow opening (inlet/outlet structure). This structure maximizes the contact area between the entire cooling liquid tank and the high-temperature waste liquid.

(Features of the invention claimed in claim 5)
The waste oil recovery container according to the invention claimed in claim 5 (hereinafter referred to as "the container according to claim 5") is the container according to claim 4, which has a substantially L-shaped outer elbow having a connecting end and an inlet/outlet end. The connecting end of the outer elbow is watertightly connected to the through hole from the outside of the side wall portion with the inlet and outlet ends facing upward, and the inlet and outlet ends of the outer elbow face upward to allow cooling fluid to enter and exit. It is characterized by being open.

According to the container according to the fifth aspect, one end of the L-shaped outer elbow projects laterally from the side wall portion, and is then bent upward so that the entrance and exit ends open upward. Therefore, it is easy for the operator to inject the coolant because it is only necessary to drop the coolant at the input and output ends. If the coolant can be injected, it can also be discharged.

(Features of the invention claimed in claim 6)
The waste oil recovery container according to the invention set forth in claim 6 (hereinafter referred to as "container according to claim 6" as appropriate) is the container according to any one of claims 1 to 5, wherein the cooling liquid is tap water. shall be.

According to the container of claim 6, since tap water is used as the cooling water, it is very easy to obtain and dispose of.

According to the present invention, the high-temperature waste oil can be collected after being cooled, which reduces the possibility of burns to workers, and the lower temperature makes it easier to handle, so the waste oil collection time can be shortened.

FIG. 2 is a front view of a fryer with a waste oil collection container installed below. 2 is a partial cross-sectional view of the fryer shown in FIG. 1. FIG. FIG. 2 is a plan view of the waste oil recovery device according to the present embodiment. 4 is a sectional view taken along line AA of the waste oil recovery container shown in FIG. 3. FIG. 4 is a rear view of the waste oil recovery container shown in FIG. 3. FIG. It is a top view of the waste oil collection container based on the 1st modification of this embodiment. 7 is a BB sectional view of the waste oil recovery container shown in FIG. 6. 7 is a sectional view taken along the line CC of the waste oil recovery container shown in FIG. 6. FIG. It is a longitudinal cross-sectional view concerning the 2nd modification of this embodiment. FIG. 2 is a side view of a waste oil recovery container including a long cooling liquid tank. It is a side view of the cooling liquid tank concerning a 3rd modification.

(Schematic configuration of flyer)
The fryer 1 shown in FIGS. 1 and 2 includes a fryer main body 3, legs 5, a control panel 7, and a waste oil recovery container 31. The fryer main body 3 has an oil tank 11 with an upper opening for storing oil Oi therein. An oil drain passage 13 is provided at the bottom of the oil tank 11 for draining waste oil by its own weight. The bottom portion 11b of the oil tank 11 is formed to be gently inclined toward the oil drain path 13 in order to reduce residual waste oil. The waste oil passage 13 is provided with an oil drain valve 15 for controlling flowing waste oil. is provided. A heater 17 is installed in the oil tank 11, and the heater 17 is controlled by the control panel 7. The legs 5 are four elongated rods with an L-shaped cross section provided at each of the four corners of the rectangular fryer main body 3 when viewed from above, and allow the fryer main body 3 to stand up on the floor F. As a result, a space is formed directly below the waste oil path 3 in which the waste oil recovery container 31 is disposed.

(Configuration of waste oil collection container and container body)
The waste oil recovery container 30 shown in FIGS. 1 to 5 is generally composed of a container body 31 made of metal such as steel, and a cooling liquid tank 40 also made of metal such as steel. The container main body 30 is a rectangular parallelepiped-shaped container with an open top and a bottom portion 31a and a side wall portion rising from the periphery of the bottom portion 31a. The side wall portion includes a front portion 31b, a rear portion 31c facing the front portion 31b, and both side portions 31d, 31d connecting the front portion 31b and the rear portion 31c. The container body 30 is made of metal so that it can withstand a waste oil temperature of around 200° C. and a weight of 30 kilograms. The inner and outer surfaces of the container body 30 are coated with anti-rust, heat-resistant paint. A handle 33 that swings like a bucket handle is swingably provided astride both side surfaces 31d, 31d of the container body 30. The handle 33 is used by an operator to lift the entire waste oil container 31.

(Configuration of cooling water tank)
Cooling liquid tank 40 is a container for storing cooling liquid. The cooling water tank 40 shown in FIG. 3 is a bottomed, upper-opening container surrounded on all sides by an outer wall 41. Although the height of the outer wall 41 is formed to be the same as that of the container body 31, it is possible to make the height different. The rear surface portion 31d of the container body 31 constitutes a part of the outer wall 41 as a common member. There are at least three methods for manufacturing the cooling water tank 40. One method is to manufacture the structure shown in FIG. 3 from scratch. The second method is to insert a partition plate into the existing waste oil recovery container 30 to separate it into the container body 31 and the cooling water tank 40. The third method is to retrofit the cooling water layer 40 on the outside of the existing waste oil recovery container 30. Although the cooling liquid tank 40 of this embodiment is installed on one side of the container body 30, it is not limited thereto. For example, there is also a type of cooling liquid tank (not shown) that surrounds the container body 31, like a moat that surrounds a castle.

As mentioned above, since the cooling liquid tank 40 (outer wall 41) is made of metal, it has high thermal conductivity. As a result, the high-temperature waste oil in the container body 31 and the cooling water in the coolant tank 40 come into thermal contact, and the thermal energy of the high-temperature waste oil can be efficiently transferred to the coolant due to the temperature gradient between the two. There is. In other words, the configuration is such that high-temperature waste oil can be efficiently cooled. This cooling lowers the temperature of the high-temperature waste oil, which reduces the possibility of burns for workers working with the waste oil.

The waste oil Oi extracted from the oil tank 11 of the fryer 1 is usually oil immediately after frying, and the temperature of the waste oil at that time is 160°C to 200°C. Therefore, the waste oil Oi inside the container body 31 is so hot that it cannot be touched. Therefore, waste oil workers must handle waste oil with extreme caution and trepidation. For this reason, the work efficiency inevitably becomes extremely low, but conversely, the lower the waste oil temperature is, the faster the work can be done, so the work time can be shortened. The waste oil temperature preferred for operation is at least 80°C or lower, more preferably 60°C or lower. This is because the temperature can be said to be manageable if it is lowered to this level.

(Flow cooling structure)
The preferred form of cooling is continuous flow cooling. In other words, the cooking oil discharged as high-temperature waste oil from the oil tank of the fryer is brought into thermal contact with the cooling liquid, cooled, and then recovered. Kakenagashi is similar to the idea that hot spring water is always poured into the bathtub, but only the amount that is poured out of the bathtub flows out. That is, new coolant is injected into the coolant tank from the injection structure, and the injected coolant overflows out of the coolant tank 40 from the discharge structure. In other words, the amount of coolant in the coolant tank 40 does not change. A preferred coolant is tap water. It does not have to be drinking water, and may be industrial water. Water other than tap water, such as well water, can also be used. These tap waters were chosen because they are very easy to obtain and dispose of, and are relatively inexpensive. The following explanation assumes tap water.

The high-temperature waste oil received in the waste oil collection container is cooled by continuous cooling before being collected, which reduces the risk of burns for workers, improves work efficiency, and shortens collection time. By pouring coolant, the coolant that comes into thermal contact with the waste oil is replaced continuously, making it difficult for the temperature of the coolant to rise. In other words, at one moment, the coolant whose temperature has increased due to heat absorption moves, and at the next moment, new coolant comes and absorbs heat, so a large temperature gradient is always maintained between the high temperature waste oil and the coolant. . Therefore, heat transfer is likely to occur, and therefore efficient waste oil cooling becomes possible.

In order to perform continuous cooling, this embodiment includes a cooling liquid supply source 43 that supplies a cooling liquid, an injection structure 45 that injects the cooling liquid supplied from the cooling liquid supply source 43 into the cooling liquid tank 40, and a cooling liquid tank. A discharge structure 47 for discharging cooling water overflowing from 40 is adopted. The coolant supply source 43 in this embodiment is water supply. The coolant supply source 43 may be a container (for example, a bucket or a kettle) in which tap water obtained from a tap is stored.

The injection structure 43 is composed of an injection pipe 43a that discharges the coolant from the injection end, and a fixing ring 43b that removably fixes the injection pipe 43a onto the coolant tank 40. The fixing ring 43b is a member that temporarily fixes the injection pipe 43a so that it does not move loosely during injection, so it may be omitted if unnecessary. The injection pipe 43a may be constituted by a water hose, and one end of the water hose may be directly connected to a water faucet (coolant supply source). In this case, if the worker supports the water hose by hand, the fixing ring 43b may not be necessary.

The discharge structure 47 is composed of a plurality of (two in this embodiment) discharge holes formed in a portion of the outer wall 41 of the cooling liquid tank 40 that does not face the container body 31, specifically, in a portion facing the container body 31. . The shape of each discharge hole can be arbitrary, and the number can be increased or decreased, but it is preferable to form them at a position and size (total area of the holes) sufficiently lower than the maximum height of the outer wall 41. This is because, although this is related to the amount of cooling water supplied, there is a danger that if the cooling water is not fully discharged from the discharge hole and overflows into the cooling liquid tank 40, the cooling water that has come into contact with the high-temperature waste oil may splash out, so this is to be avoided.

By pouring coolant, the coolant that comes into thermal contact with the waste oil is replaced continuously, making it difficult for the temperature of the coolant to rise. In other words, the coolant whose temperature has increased due to heat absorption at a certain moment moves due to thermal convection and the injection pressure of cooling water that is subsequently injected, and at the next moment, new coolant comes and absorbs heat, so the high temperature increases. A large temperature gradient is always maintained between the waste oil and the coolant. Therefore, heat transfer is likely to occur, and as a result, efficient waste oil cooling becomes possible.

An L-shaped handle 35 is attached to a portion of the outer wall 41 near the discharge hole, on which the operator hooks his/her hand from below. The handle 35 is for lifting the rear side of the container body 31 and leaning forward to pour out the waste oil. Moreover, as a preferable embodiment, a temperature seal 37 is attached to the lower part of the front part 31a. This is to enable confirmation of the temperature of the waste oil Oi stored in the waste oil container 31. Reference numeral 51 indicates a recovery valve attached to the lower left of the front part 31b in FIG. 1 when viewed from the front. The recovery valve 51 is a valve that opens when the waste oil in the container body 31 is poured out to the outside and closes when the waste oil is stored.

(First modification of this embodiment)
Modifications of this embodiment will be described with reference to FIGS. 6 to 8. The difference between this embodiment and its modification is mainly in the shape of the cooling liquid tank. Therefore, in the following sections, this difference will be mainly explained, and the same reference numerals used in FIGS. The description of the above will be omitted (the same applies to the second modified example described below).

The waste oil recovery device 50 shown in FIGS. 6 to 8 is generally composed of a container body 51 that receives waste oil, and a cooling liquid tank 60 that stores a cooling liquid that comes into thermal contact with the waste oil. A through hole (hidden in the figure by an inner elbow 62 to be described later) is formed in the side wall of the container body 51. The function of the through hole will be described later. The cooling liquid tank 60 is arranged in the container body 50, and is arranged so that if the amount of high-temperature waste oil is large, the entire tank is immersed in the high-temperature waste oil, and if there is a small amount, a part of the tank is immersed in the high-temperature waste oil.

Coolant tank 60 is made of metal. This is because high thermal conductivity is required so that the cooling water stored in the cooling liquid tank 60 can efficiently come into thermal contact with the high-temperature waste oil. The cooling liquid tank 60 generally includes a cylindrical body 61 having a bottom at one end and an opening at the other end, and an inner elbow 62 having one end watertightly screwed into the opening of the cylindrical body 61 and the other end inserted into a through hole for connection. It is configured in an inverted L shape. At the other end of the inner elbow, a flange portion 63 is formed at a position slightly inside the opening end, and on the outer periphery from the flange portion 63 to the opening end, there is a threaded portion that screws into the nut 64 (in the figure, the nut 64 is threaded). (hidden and invisible) are cut. The diameter and length of the cooling liquid tank 60 may be set as appropriate depending on the amount of high-temperature waste oil (that is, the amount of thermal energy) that the container body 51 receives and the shape of the container body 51. Here, the length is set to reach the bottom of the container body 51 so that as much cooling water as possible can be stored. If a cooling liquid tank with a larger capacity is required, the cylindrical body 61 may be installed diagonally to the bottom as shown in FIG.

A packing (not shown) is sandwiched between the inside of the container body 51 and the flange part 63, and then the threaded part is inserted into the through hole, and the packing (not shown) is fitted into the threaded part protruding from the outside of the container main body 51. and tighten with nut 64. At this time, the space between the flange portion 63 and the inside of the container body 51 is made watertight by a packing, and the space between the outside of the container body 51 and the nut is made watertight by another packing. By tightening the nut 64 in this manner, the cooling liquid tank 60 is watertightly connected to the container body 51 so that it can be held in a cantilever manner. At this time, the opening of the inner elbow 62 faces the through hole and is exposed to the outside, so cooling water is injected from there using an injection pipe (not shown), and overflowing cooling water is drained by pouring it out. I can do that. That is, the opening of the inner elbow 62 facing the through hole has an inlet/outlet structure that controls the inlet/outlet of cooling water.

(Second modification of this embodiment)
The feature of the second modification with respect to the first modification is only the outer elbow 68 shown in FIG. 9 in addition to the basic structure shown in FIG. In FIG. 9, the same members as those shown in FIG. 7 are simply given the reference numerals shown in FIG. 7, and explanations of those members are omitted. The outer elbow 68 has a substantially L-shape having a connecting end 68a and an inlet/outlet end 68b. The connecting end a of the outer elbow 68 is watertightly connected to the opening of the inner elbow 62 with the input/output end 68b facing upward. In other words, the outer elbow 68 is watertightly connected to the through hole. In this way, the inlet/output end 68b opens upward, so it can be directly injected from the coolant supply source 71 (for example, a kettle, a water faucet), and the overflowing coolant can be drained by pouring, which is convenient. be.

(Third modification of this embodiment)
A third modification of this embodiment will be described based on FIG. 11. The third modification is a modification of the cooling water tank 60. Its feature is that a plurality of heat sinks are provided on the outside of the cylindrical body 61. This increases the thermal contact area between the high-temperature waste liquid and the cooling water, so efficient cooling can be expected.

1 Fryer 3 Fryer body 5 Legs
7 Control panel 11 Oil tank 11b Bottom 13 Oil drain path 15 Oil drain valve 17 Heater 30 Waste oil collection container
31 Container body 31a Bottom part 31b Front part 31c Rear part 31d Side part 33 Handle 35 Pull 37 Seal thermometer 40 Cooling liquid tank 41 Outer wall 43 Cooling liquid supply source 45 Injection structure 47 Discharge structure 50 Waste oil collection container 51 Container body 60 Cooling liquid tank 61 Cylindrical body 62 Inner elbow 63 Flange part 64 Nut 67 Input/output structure 68 Outer elbow 71 Cooling water supply source 73 Heat sink

Claims (6)

A waste oil collection container installed under a fryer having an oil tank for storing edible oil,
The waste oil recovery container includes a container body that receives the cooking oil discharged as high-temperature waste oil from the oil tank, and a cooling liquid tank that stores the cooling liquid,
The container body includes a bottom portion and a side wall portion rising from the periphery of the bottom portion,
The cooling liquid tank includes an outer wall, and is arranged inside or outside of the side wall, and is configured to be able to bring the high temperature waste oil into thermal contact with the cooling liquid through at least a portion of the outer wall.
A waste oil collection container characterized by: The coolant tank includes an injection structure for injecting the coolant supplied from the coolant supply source, and a discharge structure for discharging the coolant injected by the injection structure in a flow-through manner. The waste oil recovery container according to claim 1, characterized in that: The cooling liquid tank is arranged inside the side wall part,
An input/output structure is formed in which the injection structure and the discharge structure are integrated,
The entry/exit structure is watertightly connected to a through hole provided in the side wall portion.
The waste oil recovery container according to claim 2, characterized in that: The cooling liquid tank has a substantially inverted L shape that includes a cylindrical body having a bottom at one end and an opening at the other end, and an inner elbow having one end watertightly connected to the opening of the cylindrical body and the other end watertightly connected to the through hole. It is composed of
The entrance/exit structure is constituted by an opening of the inner elbow facing the through hole.
The waste oil recovery container according to claim 3, characterized in that: A substantially L-shaped outer elbow having a connecting end and an inlet/outlet end is provided,
The connecting end of the outer elbow is watertightly connected to the through hole from the outside of the side wall portion with the input/output end facing upward;
The inlet/outlet end of the outer elbow opens upward to allow cooling fluid to enter and exit.
The waste oil recovery container according to claim 4, characterized in that: The cooling liquid is tap water,
The waste oil recovery container according to any one of claims 1 to 5.

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