Clean meat stock refrigerator

Abstract

The present invention allows for easy cleaning of the stirring blades of the stirring body, which is positioned inside a storage tank where broth is stored and stirs the broth, by lifting the top cover covering the outer casing to completely expose the stirring body from the storage tank. This enables the stirring body to be kept clean at all times. Furthermore, by minimizing contact with the bottom surface of the storage tank through the contact protrusions and arc-shaped spaces of the stirring blades, the generation of impurities caused by scraping the bottom surface of the tank can be prevented in advance. Additionally, it prevents residue from the stirred broth from getting stuck in the stirring blades. Since the temperature of the broth contained in the storage tank can be directly detected by the broth temperature sensor, the user can always obtain the desired broth slush. Moreover, it can firmly support the load when the stirring body is lifted by hinge rotation, thereby preventing safety accidents caused by the raised stirring body tipping over during cleaning of the stirring body and stirring blades. Furthermore, by being equipped with stainless steel, it prevents rust and ensures clean and hygienic use at all times. The stirring shaft and A clean broth cooler is disclosed in which the stirring blade is positioned on one side rather than in the center of the storage tank, thereby preventing interference between the broth ladle scooping the broth, the stirring shaft, and the stirring blade by causing them to collide with each other.

Description

Technology Field

[0001] The present invention relates to a clean broth cooler, and more specifically, to a clean broth cooler that minimizes scratching of the inner bottom surface of a storage tank by means of a stirring blade that stirs the broth, thereby preventing the generation of impurities, and double-checks the temperature of the broth to maintain an appropriate slush state, as well as ensuring that the ladle is not interfered with when scooping out the broth. Background Technology

[0002] Generally, cold noodles or buckwheat noodles are sold as delicacies during the hot summer season; their flavor is determined by the broth added to them, and this broth has typically been stored in refrigerated broth storage units to maintain its cold temperature.

[0003] In particular, to make cold noodles or buckwheat noodles even more refreshing, ice pieces frozen separately in a freezer or slush made by crushing whole ice is placed in the broth storage tank to keep the broth cold.

[0004] However, it was very inefficient to prepare slush made from crushed ice or whole ice for the broth every time, and since cold noodles or buckwheat noodles could not be made quickly, most of the slush was put in advance into the broth storage tank where the broth was stored. However, the problem of the slush clumping together and refreezing after being stored for a long time occurred, causing the inconvenience of restaurant staff having to stir frequently to prevent freezing.

[0005] Accordingly, recently, broth coolers that store broth and simultaneously produce slush are being provided.

[0006] This broth cooler is equipped with a cooling line on the outer surface of a storage tank where broth is stored, and the cooling is sequentially repeated at set times to automatically generate broth slush.

[0007] In addition, the interior of the storage tank is equipped with a stirring blade that agitates the broth slush to prevent it from freezing, and a separate drive motor is provided to rotate the stirring blade. The stirring blade, receiving power from the drive motor, rotates to agitate the broth slush contained inside the storage tank.

[0008] However, in conventional broth slush makers, the drive shaft connecting the drive motor installed to rotate the stirring blade inside the storage tank and the stirring blade penetrates the bottom surface of the storage tank, so a gap is created in the bottom surface of the storage tank through which the drive shaft penetrates, and as broth leaks out through the created gap, it causes the drive motor driving the stirring blade to malfunction and become a cause of breakdown.

[0009] Furthermore, as the lower part of the stirring blade rotates while in full contact with the inner bottom surface of the storage tank, it scrapes the inner bottom surface of the tank. Consequently, impurities are generated from the scraped bottom surface of the tank, and there is a problem in that these generated impurities mix directly into the broth.

[0010] In addition, since the connection between the stirring blade and the motor drive shaft of the broth cooler is made inside the storage tank, broth residue gets stuck in the connection between the stirring blade and the drive shaft, making it difficult to maintain the cleanliness of the broth. Furthermore, there is a problem in that cleaning is not performed properly because the connection between the stirring blade and the drive shaft is difficult.

[0011] Furthermore, since the drive shaft that drives the stirring blade in conventional broth coolers is positioned vertically in the center of the storage tank, there is a problem in that the drive shaft and the broth ladle come into contact and interfere when the broth ladle is immersed inside the storage tank to scoop out the broth.

[0012] Looking at the prior art, a stirring device for a broth slush refrigerator, registered patent No. 10-1303618, has been devised. This stirring device for a broth slush refrigerator includes a storage tank for storing broth installed inside an outer housing and a refrigerant pipe installed on the outer surface of the storage tank. In this device, a shaft housing with a through hole formed at its upper end is integrally formed to protrude upward from the center of the bottom surface of the storage tank to the upper opening of the storage tank. A shaft formed long so that the shaft end of a motor installed on the bottom of the outer housing is exposed through the through hole of the shaft housing is inserted and installed from the lower side of the shaft housing. A stirring shaft with a screw groove formed at the upper end of the shaft and a stirring blade formed at the lower end is inserted and coupled from the upper side of the shaft housing. A screw hole corresponding to the through hole is formed on the upper side of the stirring shaft, and a nut is welded to the upper side of the stirring shaft so as to be positioned above the screw hole. A bolt is then coupled to the screw groove of the shaft through the nut and the screw hole to connect the stirring shaft and the shaft.

[0013] In this conventional technology, the connection between the motor shaft and the stirring shaft is formed at the upper end of a shaft housing that protrudes a predetermined height from the center of the bottom surface of the storage tank, so the connection is not submerged in the broth, thereby preventing food from getting stuck in the connection and maintaining the cleanliness of the broth.

[0014] However, since the stirring blade is installed in the center of the storage tank and rotated by a bottom motor, the entire inner bottom surface of the storage tank is scraped by the stirring blade, causing impurities in the storage tank to mix with the broth. Additionally, because the stirring blade shaft is installed in the center, it interferes with scooping out the broth inside the storage tank, and the problem of difficulty in cleaning the stirring blade has not yet been resolved. Prior art literature

[0015] Patent Document 1: Korean Registered Patent No. 10-1303618 (Registered Aug. 29, 2013) Patent Document 2: Korean Registered Utility Model No. 20-0389923 (Registered July 6, 2005) The problem to be solved

[0016] The purpose of the present invention is to provide a clean broth cooler that prevents interference with a broth ladle by positioning a stirring element for stirring the broth contained inside a storage tank on one side rather than in the center of the storage tank, prevents the generation of impurities by minimizing contact between the stirring blade and the bottom surface of the storage tank, facilitates the rotational movement of the stirring blade inside the storage tank, and facilitates the cleaning of the stirring blade to maintain a clean state at all times, and detects the temperature of the broth by a broth temperature sensing unit that detects the temperature of the broth contained inside the storage tank so that the slush state of the broth is always evenly maintained, and prevents the generation of broth residue in advance. means of solving the problem

[0017] As a means to achieve the above objective, the clean broth cooler of the present invention comprises: a storage tank for containing broth; an outer casing that surrounds and protects the outer surface of the storage tank; a cooling drive unit having a cooling line that surrounds the outer surface of the storage tank to generate slush from the broth stored in the storage tank; a control unit electrically connected to the cooling drive unit and controlling the cooling drive unit; an upper cover comprising a first cover portion that covers the top of the storage tank and is fixed to the outer casing, and a second cover portion that covers the top of the first cover portion and is lifted from the first cover portion; a hinge portion provided on the upper outer surface of the outer casing to stir the broth contained in the storage tank; a stirring bracket connected to the hinge portion and bolted to the upper part of the second cover portion of the upper cover; a driving motor having a driving shaft provided on the upper part of the stirring bracket and exposed to the outside of the second cover portion; a stirring shaft with its upper end connected to the driving shaft and located on one side inside the storage tank; and the A broth cooler comprising a stirring body having a stirring blade formed in the shape of a plate, which is provided at the lower end of a stirring shaft and is rotated by the rotational movement of the stirring shaft and is in close contact with the inner bottom surface of the storage tank, and an opening cover provided on the second cover portion that opens the second cover portion when scooping out broth contained in the storage tank, wherein the stirring body is hinge-rotated toward the upper side of the outer casing by a hinge member so that the second cover portion is lifted from the first cover portion and the stirring body is completely lifted from the inside of the storage tank toward the upper side of the storage tank and exposed by the operation of hinge-rotating the stirring body toward the upper side of the outer casing, wherein at the lower end of the stirring blade formed in the shape of a plate, a plurality of linear contact protrusions that are in close contact with the inner bottom surface of the storage tank;A curved space is provided that is extended between each of the plurality of contact protrusions and is formed so as to be recessed upward relative to each of the plurality of contact protrusions, thereby being spaced apart from the inner bottom surface of the storage tank so that broth residue does not accumulate as the broth in the storage tank drains out during the rotational stirring operation of the stirring blade; a broth temperature sensing sensor is provided that is electrically connected to the control unit; the upper end of the broth temperature sensing sensor is connected to a second cover part that covers the upper end of the first cover part, so that when the second cover part covers the first cover part, it is positioned inside the storage tank to detect the temperature of the broth contained in the storage tank and electrically transmit it to the control unit, and is configured to be lifted toward the upper side of the storage tank along the second cover part when the second cover part is hinge-opened from the first cover part.

[0018] Furthermore, the above hinge body comprises: a hinge bracket whose lower end is connected to the outer body and whose upper end is hinge-connected to the stirring bracket; a hinge shaft that hinge-connects the stirring bracket and the hinge bracket; and an elastic load-supporting part that supports the load of the stirring body, wherein the upper end is connected to the hinge shaft and the lower end is connected to the hinge bracket, and the stirring body is hinge-rotated toward the upper side of the outer body so that the second cover part is hinge-opened and is pressed, and then released when the stirring body and the second cover part are completely folded toward the upper side of the outer body.

[0019] delete

[0020] delete Effects of the invention

[0021] The present invention allows for easy cleaning of the stirring blades of the stirring body, which is positioned inside a storage tank where broth is stored and stirs the broth, by lifting the top cover covering the outer casing to completely expose the stirring body from the storage tank. This enables the stirring body to be kept clean at all times. Furthermore, by minimizing contact with the bottom surface of the storage tank through the contact protrusions and arc-shaped spaces of the stirring blades, the generation of impurities caused by scraping the bottom surface of the tank can be prevented in advance. Additionally, it prevents residue from the stirred broth from getting stuck in the stirring blades. Since the temperature of the broth contained in the storage tank can be directly detected by the broth temperature sensor, the user can always obtain the desired broth slush. Moreover, it can firmly support the load when the stirring body is lifted by hinge rotation, thereby preventing safety accidents caused by the raised stirring body tipping over during cleaning of the stirring body and stirring blades. Furthermore, by being equipped with stainless steel, it prevents rust and ensures clean and hygienic use at all times. The stirring shaft and Since the stirring blade is positioned on one side rather than in the center of the storage tank, interference between the broth ladle, the stirring shaft, and the stirring blade can be prevented. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view showing a clean broth cooler according to the present invention. FIG. 2 is a second perspective view showing the clean broth cooler of the present invention. FIG. 3 is a partially omitted perspective view showing the hinge body of the clean broth cooler of the present invention. Figure 4 is a schematic diagram showing the configuration of the clean broth cooler of the present invention. FIG. 5 is a partially omitted perspective view showing a stirring element, which is a component of the clean broth cooler of the present invention. FIG. 6 is an exploded view of the open cover of the clean broth cooler of the present invention in an open state. FIG. 7 is a diagram showing the configuration of the stirring body and the first cover part of the clean broth cooler of the present invention in an open state. FIG. 8 is a conceptual diagram showing another embodiment of the clean broth cooler of the present invention. Specific details for implementing the invention

[0023] In addition to the above objectives, other objectives and features of the present invention will become apparent through the description of embodiments with reference to the accompanying drawings.

[0024] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0025] Hereinafter, a clean broth cooler according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

[0026] As described above, the present invention relates to a broth cooler comprising a storage tank (1) in which broth is contained, an outer body (2) that surrounds and protects the outer surface of the storage tank (1), a cooling drive unit (4) having a cooling line (3) that surrounds the outer surface of the storage tank (1) to produce a slush from the broth stored in the storage tank (1), a control unit (5) that is electrically connected to the cooling drive unit (4) and controls the cooling drive unit (4), an upper cover (10) that covers the top of the storage tank (1), and a stirring body (20) that stirs the broth contained in the storage tank (1).

[0027] As illustrated, the storage tank (1) and outer body (2) of the present invention are depicted as cylindrical, but are not limited thereto, and the storage tank (1) and outer body (2) can be modified in various ways, such as square or octagonal.

[0028] The upper cover (10) of the present invention is provided with a first cover part (11) fixed to the outer body (2) and a second cover part (12) that covers the upper part of the first cover part (11) and is lifted from the first cover part (11).

[0029] Accordingly, as the second cover part (12) is lifted with respect to the first cover part (11), the top of the storage tank (1), which is covered by the first cover part (11), is opened, and the stirring body (20) is lifted from the inside of the storage tank (1).

[0030] In addition, the stirring body (20) of the present invention is configured such that, by means of a lifting operation, the second cover part (12) is lifted from the first cover part (11), and the stirring body (20) is completely removed from inside the storage tank (1) to the upper side of the storage tank (1).

[0031] That is, the above stirring body (20) comprises a hinge body (30) provided on the upper outer surface of the outer body (2), a stirring bracket (21) connected to the hinge body (30) and bolted to the upper end of the second cover part (12) of the upper cover (10), a driving motor (23) having a driving shaft (22) provided on the upper end of the stirring bracket (21) and exposed to the outside of the second cover part (12), a stirring shaft (24) with its upper end connected to the driving shaft (22) and located on one side inside the storage tank (1), and a stirring blade (25) provided on the lower end of the stirring shaft (24) and in close contact with the inner bottom surface (1a) of the storage tank (1).

[0032] Additionally, the second cover portion (12) is provided with an opening cover (26) that opens the second cover portion (12) when scooping out the broth contained in the storage tank (1).

[0033] The above-mentioned opening cover (26) is configured to open or block the top of the second cover portion (12) as illustrated, and may be configured to be covered by the second cover portion (12) or to be opened by hinge rotation with the second cover portion (12) through a hinge.

[0034] As shown in FIG. 5, the stirring shaft (24) is formed in a rod shape and the stirring blade (25) is formed in a plate shape, and is provided on one side of the storage tank (1) rather than being located in the center of the interior of the storage tank (1). Accordingly, when the opening cover (26) is separated from the second cover part (12) and a ladle for scooping out broth is placed inside the storage tank (1) toward the open second cover part (12), the broth ladle (not shown) does not come into contact with the stirring shaft (24) and stirring blade (25) located on one side of the interior of the storage tank (1), making it easy to scoop out broth using the broth ladle and preventing the broth from overflowing as the broth ladle hits the stirring shaft (24) and stirring blade (25).

[0035] In addition, in the present invention, the driving motor (23) and the driving shaft (22), which are driving means for rotating the stirring shaft (24) and the stirring blade (25), are exposed to the outside of the second cover part (12) forming the upper cover (10) as shown in the illustration, so that repair and maintenance work on the driving motor (23) can be easily performed.

[0036] The stirring body (20) of the present invention is lifted by hinge rotation from the first cover part (11) of the top cover (10) covering the top of the outer body (2). At this time, as the second cover part (12) is lifted from the first cover part (11), the stirring shaft (24) and stirring blade (25) located inside the storage tank (1) are lifted and exposed to the upper side of the outer body (2).

[0037] That is, as shown in FIG. 7, the stirring body (20) is hinge-connected to the hinge body (30). Accordingly, when the stirring body (20) is tilted to one side and hinge-rotated, the stirring body (20) is also hinge-rotated and lifted. Consequently, the stirring shaft (24) and stirring blade (25) of the stirring body (20) are lifted and exposed to the upper side of the outer body (2) as shown in FIG. 7.

[0038] After cleaning the stirring shaft (24) and stirring blade (25) of the exposed stirring body (20) in this manner, the stirring body (20) and the second cover part (12), which were lifted by hinge rotation, are lowered by hinge downward toward the first cover part (11) provided at the top of the outer body (2), and the stirring shaft (24) and stirring blade (25) of the stirring body (20) are positioned inside the storage tank (2).

[0039] Accordingly, since the stirring shaft (24) and stirring blade (25) of the stirring body (20) can be exposed, cleaning work on the stirring shaft (24) and stirring blade (25) can be easily performed, so the stirring shaft (24) and stirring blade (25) can always be maintained in a clean state.

[0040] The stirring blade (25) of the present invention is formed such that the lower end of the stirring shaft (24) is welded and fixed, and rotates by the rotational movement of the stirring shaft (24). At the lower end of the stirring blade (25), a plurality of linear contact protrusions (27) are provided that are in close contact with the inner bottom surface (1a) of the storage tank (1), and an arc-shaped space (28) is provided that is extended between the plurality of contact protrusions (27) and is formed so as to be recessed upward relative to the plurality of contact protrusions (27), thereby being spaced apart from the inner bottom surface (1a) of the storage tank (1) so that the broth in the storage tank (1) does not get stuck while the broth drains out during the rotational stirring movement of the stirring blade (25).

[0041] At this time, the plurality of contact protrusions (27) and arc-shaped spaces (28) may be formed in a sawtooth shape as illustrated, and may also be formed in various other shapes.

[0042] The present invention, as described above, is such that when the stirring blade (25) is rotated by the rotational movement of the stirring shaft (24), the contact protrusions (27) provided at the bottom of the stirring blade (25) are rotated in a state of contact with the inner bottom surface (1a) of the storage tank (1), thereby stirring the broth contained in the storage tank (1). At this time, since the contact protrusions (27) are spaced apart from each other at equal intervals by the arc-shaped space (28) and are formed in a linear manner, the contact range with the inner bottom surface (1a) of the storage tank (1) can be minimized, so the entire inner bottom surface (1a) of the storage tank (1) is not scraped, thereby preventing the generation of impurities.

[0043] In addition, since the stirring of the broth is carried out as it passes through the above-mentioned arc-shaped space (28), the stirring operation of the broth in the form of a slush can be carried out more smoothly and easily.

[0044] The hinge body (30) of the present invention comprises a hinge bracket (31) whose lower end is connected to the outer body (2) and whose upper end is hinge-connected to the stirring bracket (21), a hinge shaft (32) that hinge-connects the stirring bracket (21) and the hinge bracket (31), and an elastic load support member (33) whose upper end is connected to the hinge shaft (32) and whose lower end is connected to the hinge bracket (31).

[0045] As shown in the illustration, the above elastic load support member (33) can be formed in the shape of a coil spring capable of contracting and expanding, and in addition, any shape having elasticity, such as a leaf spring or a torsion spring, is also possible.

[0046] The present invention, thus constructed, can prevent safety accidents caused by the raised stirring body (20) and the second cover part (12) falling toward the first cover part (11) when the stirring body (20) is hinge-rotated toward the upper side of the outer body (1) and the second cover part (12) is hinge-opened. When the stirring body (20) and the second cover part (12) are completely folded toward the upper side of the outer body (2), the compression is released and the stirring body (20) supports the load of the stirring body (20).

[0047] The present invention is not limited to, of course, and the materials of the outer body (2), storage tank (2), stirring shaft (24), and stirring blade (25) are made of stainless steel to prevent rust and to maintain a clean and hygienic state at all times.

[0048] The present invention is provided with a broth temperature sensing unit (50) that is electrically connected to each of the control units (5).

[0049] The above broth temperature sensing sensor unit (50) has its upper end connected to a second cover unit (12) that covers the upper end of the first cover unit (11), and when the second cover unit (12) covers the first cover unit (11), it is located inside the storage tank (1) to detect the temperature of the broth contained in the storage tank (1) and electrically transmit it to the control unit (5).

[0050] The present invention, as described above, detects the temperature of the broth contained in the storage tank (1) by the broth temperature sensing unit (50) and electrically transmits it to the control unit (5), thereby allowing the control unit (5) to adjust the driving time of the cooling drive unit (4) to an appropriate time, so that the slush state of the broth contained in the storage tank (1) can always be maintained evenly.

[0051] As shown in the illustration, the above-mentioned broth temperature sensor part (50) is formed in a rod shape, and accordingly, when the second cover part (12) is hinge-opened from the first cover part (11), it can be lifted up along the second cover part (12) toward the upper side of the storage tank (1), so that the broth temperature sensor part (50) can also be cleaned.

[0052] As described above, the present invention has been explained by specific details such as specific components, limited embodiments, and drawings; however, this is provided merely to aid in a more comprehensive understanding of the invention, and the invention is not limited to the above embodiments. Those skilled in the art can make various modifications and variations from this description.

[0053] Accordingly, the scope of the present invention should not be limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept of the present invention. Explanation of the symbols

[0054] 1 : Storage tank 1a : Inner bottom surface of the storage tank 2 : Outer shell 3 : Cooling line 4 : Cooling drive unit 5 : Control unit 10: Top cover 11: First cover part 12: Second cover part 20: Stirring body 21: Stirring bracket 22: Drive shaft 23 : Drive motor 24 : Stirring shaft 25: Stirring blade 26: Open cover 27 : Close-fitting protrusion 28 : Arc-shaped space 30 : Hinge body 31 : Hinge bracket 32 : Hinge axis 33 : Elastic load support 50 : Broth temperature sensing unit

Claims

Claim 1 A storage tank (1) for holding broth, an outer body (2) that surrounds and protects the outer surface of the storage tank (1), a cooling drive unit (4) having a cooling line (3) that surrounds the outer surface of the storage tank (1) to create a slush from the broth stored in the storage tank (1), a control unit (5) that is electrically connected to the cooling drive unit (4) and controls the cooling drive unit (4), an upper cover (10) comprising a first cover part (11) that covers the top of the storage tank (1) and is fixed to the outer body (2), and a second cover part (12) that covers the top of the first cover part (11) and is lifted from the first cover part (11), a hinge part (30) provided on the upper outer surface of the outer body (2) to stir the broth contained in the storage tank (1), and a top cover (10) connected to the hinge part (30). A stirring body (20) comprising a stirring bracket (21) bolted to the upper end of the second cover part (12), a driving motor (23) having a driving shaft (22) provided on the upper end of the stirring bracket (21) and exposed to the outside of the second cover part (12), a stirring shaft (24) having its upper end connected to the driving shaft (22) and located on one side inside the storage tank (1), a stirring blade (25) provided on the lower end of the stirring shaft (24) with the lower end of the stirring shaft (24) welded and fixed so as to rotate by the rotational movement of the stirring shaft (24) and to be in close contact with the inner bottom surface (1a) of the storage tank (1) and formed in a plate shape, and an opening cover (26) provided on the second cover part (12) to open the second cover part (12) when scooping out the broth contained in the storage tank (1), and the stirring body (20) In a broth cooler comprising a broth temperature sensing sensor unit (50) electrically connected to the control unit (5), wherein the second cover unit (12) is lifted from the first cover unit (11) and the stirring unit (20) is completely lifted and exposed from inside the storage tank (1) to the upper side of the storage tank (1) by a hinge rotation operation of the outer body (2) by means of the hinge body (30), the lower end of the plate-shaped stirring blade (25) is,A plurality of linear contact protrusions (27) that are in close contact with the inner bottom surface (1a) of the storage tank (1); A curved space (28) is provided that is extended between each of the plurality of contact protrusions (27) and is formed so as to be recessed upward relative to each of the plurality of contact protrusions (27), so that during the rotational stirring operation of the stirring blade (25), the broth in the storage tank (1) drains out and broth residue does not get stuck, and is spaced apart from the inner bottom surface (1a) of the storage tank (1). The upper end of the broth temperature sensing sensor (50) is connected to the second cover part (12) that covers the upper end of the first cover part (11), and when the second cover part (12) covers the first cover part (11), it is positioned inside the storage tank (1) to detect the temperature of the broth contained in the storage tank (1) and electrically transmit it to the control unit (5). When the second cover part (12) is hinge-opened from the first cover part (11), it follows the second cover part (12). A clean broth cooler characterized by being formed to be lifted upwards toward the upper side of the storage tank (1). Claim 2 A clean broth cooler according to claim 1, wherein the hinge body (30) comprises: a hinge bracket (31) whose lower end is connected to the outer body (2) and whose upper end is hinge-connected to the stirring bracket (21); a hinge shaft (32) that hinge-connects the stirring bracket (21) and the hinge bracket (31); and an elastic load-supporting part (33) whose upper end is connected to the hinge shaft (32) and whose lower end is connected to the hinge bracket (31), and which supports the load of the stirring body (20) by hinge-rotating the stirring body (20) toward the upper side of the outer body (1) so that the second cover part (12) is hinge-opened and then released when the stirring body (20) and the second cover part (12) are completely folded toward the upper side of the outer body (2). Claim 3 delete

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