CN113767941A

CN113767941A - Dough mixing machine with refrigeration function

Info

Publication number: CN113767941A
Application number: CN202110749508.1A
Authority: CN
Inventors: 盘红霞; 肖敏; 肖芳芳
Original assignee: Guangzhou Chuangpu Machinery Manufacturing Co ltd
Current assignee: Guangzhou Chuangpu Machinery Manufacturing Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-12-10

Abstract

The invention discloses a dough mixing machine with refrigeration function, comprising: face bucket, heat exchange tube and air conditioner. The flour bucket is used for containing the fabrics and water, and a heat insulation cavity is formed between the inner shell of the flour bucket and the outer shell of the flour bucket. The heat exchange tube is located the thermal-insulated intracavity to encircle the outer wall of inner shell and be connected with the outer wall heat conduction of inner shell. In this way, the heat exchange tube is contacted with the heat insulation cavity as much as possible, and the temperatures of all positions of the flour barrel are similar as much as possible. The refrigeration output end of the air conditioner is communicated with the liquid inlet end of the heat exchange tube, and the refrigeration return end of the air conditioner is communicated with the liquid outlet end of the heat exchange tube. It can prevent impurities from entering the pipeline, thereby preventing the pipeline from being blocked by the impurities; furthermore, the excessive requirement for the material of the dough barrel is reduced, thereby allowing the cost of the dough barrel to be reduced.

Description

Dough mixing machine with refrigeration function

Technical Field

The invention relates to the technical field of dough kneaders, in particular to a dough kneader with a refrigeration function.

Background

A dough mixer belongs to a flour food machine, and has the main function of uniformly mixing flour and water. The dough barrel (or called dough jar and charging basket) is used for containing a large amount of flour and water, so that large-scale dough mixing can be carried out. However, during dough kneading in a dough kneading machine, the high-speed running friction between the hook (i.e. the stirring tool) and the barrel wall can cause the dough temperature to gradually rise, and after the dough temperature is higher than 30 ℃, the dough yeast can react with the dough yeast, even the yeast is burned out, the yeast loses the fermentation effect, and the dough becomes scrapped dead dough.

The dough mixer disclosed in the invention patent application previously filed by the same applicant (patent application number is CN202010668966.8) circularly cools the dough barrel through cooling water, so that the dough barrel can be quickly cooled in the dough mixing process, the use of crushed ice is saved, and the cost for purchasing an ice crusher is saved.

However, this device has the following drawbacks:

1. the cooling water may be mixed with impurities, which accumulate over time and remain in the heat exchange cavity easily, thereby blocking the circulating water channel (pipeline).

2. The cavity wall of the cooling cavity is in contact with the water body for a long time, so that higher requirements are put on the material of the noodle barrel, namely the noodle barrel is not made of carbon steel, otherwise the noodle barrel is easy to rust, and then the noodle barrel is corroded from point to surface until the noodle barrel is damaged.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a dough mixer with a refrigeration function, which can prevent impurities from entering a pipeline, thereby preventing the pipeline from being blocked by the impurities; furthermore, the excessive requirement for the material of the dough barrel is reduced, thereby allowing the cost of the dough barrel to be reduced.

The purpose of the invention is realized by adopting the following technical scheme:

dough mixer with refrigeration function includes:

the flour barrel is used for containing the fabrics and water, and a heat insulation cavity is formed between an inner shell of the flour barrel and an outer shell of the flour barrel;

the heat exchange tube is positioned in the heat insulation cavity, surrounds the outer wall of the inner shell of the dough barrel and is in heat conduction connection with the outer wall of the inner shell of the dough barrel;

the refrigeration output end of the air conditioner is communicated with the liquid inlet end of the heat exchange tube, and the refrigeration return end of the air conditioner is communicated with the liquid outlet end of the heat exchange tube.

Further, the heat insulation cavity is filled with a polyurethane foaming agent.

Furthermore, the dough mixer with the refrigerating function also comprises a tray body, the upper end surface of the tray body is connected with the inner shell of the dough barrel, and the lower end surface of the tray body or the side surface of the tray body is connected with the outer wall of the dough barrel to seal the heat insulation cavity;

the tray body is provided with a liquid inlet through hole and liquid outlet through holes which are parallel to the liquid inlet through hole and are arranged at intervals along the axial direction of the tray body; the upper end surface of the tray body sinks downwards to form a liquid inlet tank and a liquid outlet tank;

one end of the liquid inlet groove is communicated with the liquid inlet through hole, and the other end of the liquid inlet groove penetrates through the side wall of the tray body and is communicated with the heat insulation cavity;

one end of the liquid outlet groove is communicated with the liquid inlet through hole, and the other end of the liquid outlet groove penetrates through the side wall of the tray body and is communicated with the heat insulation cavity;

the heat exchange tube is including the first bottom coil pipe, side pipe and the second bottom coil pipe that communicate in order, the appearance of first bottom coil pipe with the appearance in feed liquor groove is the same in order to inlay to be in the feed liquor inslot, the side pipe encircles the outer wall of inner shell and with the outer wall heat conduction of the inner shell of face bucket is connected, the appearance of second bottom coil pipe with the appearance in play liquid groove is the same in order to inlay to be in go out the liquid inslot.

Further, the liquid inlet groove and the liquid outlet groove are arranged in a central symmetry mode about the axis of the disc body.

Furthermore, the liquid inlet groove comprises a plurality of first arc sections and a plurality of first connecting sections, the end parts of the adjacent first arc sections are communicated through the first connecting sections, and the radiuses of the first arc sections are gradually increased from inside to outside along the radial direction of the disc body;

the drain tank includes a plurality of second circular arc sections and a plurality of second linking section, and is adjacent the tip of second circular arc section passes through the second and links up the section switch-on, and is a plurality of the radius of second circular arc section is followed the radial from inside to outside crescent of disk body.

Furthermore, the first connecting section is a straight line section, the first connecting section extends along the radial direction of the tray body, and the first connecting section at the outermost edge of the tray body penetrates through the side wall of the tray body from inside to outside along the radial direction of the tray body;

the second connecting section is a straight line section and extends along the radial direction of the disc body; the second connection section at the outermost edge of the tray body penetrates through the side wall of the tray body from inside to outside along the radial direction of the tray body.

Furthermore, the dough mixing machine with the refrigerating function also comprises a rotating shaft and a sealing structure;

the rotating shaft is connected to the bottom of the tray body; the rotating shaft is provided with a liquid inlet channel and a liquid outlet channel, and the liquid inlet channel and the liquid outlet channel both extend along the axial direction of the rotating shaft;

the sealing structure comprises a shell, a mechanical seal and a spacer, wherein the shell is provided with a liquid inlet cavity, the mechanical seal is arranged in the liquid inlet cavity, and the mechanical seal comprises two movable rings and two static rings; the rotating shaft is sleeved on the movable ring and the static rings, the two static rings are respectively abutted against the shell, and the two movable rings are respectively positioned between the two static rings; the isolating piece is arranged between the two movable rings; the rotating shaft is radially provided with a liquid through hole, and two ends of the liquid through hole are respectively communicated to the bottom end of the liquid inlet channel and the liquid inlet cavity; the bottom end of the liquid outlet channel penetrates through the side curved wall of the rotating shaft or the bottom of the rotating shaft.

Furthermore, the shell, the bottom end of the rotating shaft and one of the stationary rings form a liquid outlet cavity in an enclosing manner, and the bottom end of the liquid outlet channel penetrates downwards to the liquid outlet cavity; the dough mixing machine with the refrigerating function further comprises a liquid outlet pipe, and the liquid outlet pipe is communicated with the liquid outlet cavity.

Furthermore, the isolating piece is an annular blocking piece which is fixedly sleeved on the rotating shaft, the blocking piece is provided with a liquid passing hole penetrating through the inner wall and the outer wall of the blocking piece, and the liquid passing hole is communicated with the liquid inlet cavity through the liquid passing hole; the liquid inlet cavity is connected with a liquid inlet pipe.

Further, the insulating cavity surrounds the entire circumference of the dough barrel.

Compared with the prior art, the invention has the beneficial effects that:

1. the dough barrel is cooled through the air conditioner, so that the temperature can be controlled more stably in the dough kneading process, low-temperature dough kneading is realized, and the yeast is prevented from being burned. The heat exchange tube is accommodated through the heat insulation cavity formed between the inner wall of the noodle barrel and the outer wall of the noodle barrel, so that the heat exchange tube can be prevented from being exposed in the external environment, energy waste is avoided, and the effective cooling effect of the noodle barrel is guaranteed.

2. Through the outer wall of the inner shell of heat exchange tube ring face bucket and with the outer wall heat conduction of the inner shell of face bucket be connected, so can make the temperature of face bucket each position department close.

3. Because the air-conditioning refrigeration is adopted to replace the water circulation refrigeration, the defect of rustiness cannot be caused, and the noodle barrel is allowed to be supported by the carbon-containing material, namely, the requirement on the material is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a dough mixer with refrigeration function according to the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a cross-sectional view of FIG. 4;

fig. 6 is a structural view of the tray body shown in fig. 1.

In the figure: 1. a dough barrel; 2. a thermally insulating cavity; 3. a heat exchange pipe; 31. a first chassis pipe; 32. a side tube; 33. a second chassis pipe; 4. a tray body; 41. a liquid inlet through hole; 42. a liquid outlet through hole; 43. a liquid inlet tank; 431. a first arc segment; 432. a first engagement section; 44. a liquid outlet groove; 441. a second arc segment; 442. a second engagement section; 5. a rotating shaft; 51. a liquid inlet channel; 52. a liquid outlet channel; 53. a liquid through hole; 6. a sealing structure; 61. a housing; 611. a liquid inlet cavity; 62. mechanical sealing; 621. a moving ring; 622. a stationary ring; 63. a spacer; 631. a liquid passing hole; 7. a liquid outlet cavity; 8. a liquid outlet pipe; 9. a liquid inlet pipe.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used herein, "vertical," "horizontal," "left," "right," and similar expressions are for purposes of illustration only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1-2 show a dough mixer with a refrigerating function according to a preferred embodiment of the present invention, including: the device comprises a flour barrel 1, a heat exchange tube 3 and an air conditioner. The heat exchange tube 3 is preferably a copper tube.

The flour barrel 1 is used for containing the fabrics and water, a heat insulation cavity 2 is formed between an inner shell of the flour barrel 1 and an outer shell of the flour barrel 1, and the heat insulation cavity 2 is used for preventing the heat exchange tube 3 from being in direct contact with the outside, so that condensed water is prevented from being condensed outside the heat exchange tube 3.

The heat exchange tube 3 is positioned in the heat insulation cavity 2, surrounds the outer wall of the inner shell of the noodle barrel 1 and is in heat conduction connection with the outer wall of the inner shell of the noodle barrel 1. In this way, the heat exchange pipe 3 is brought into contact with the heat insulating chamber 2 over as large an area as possible and the temperatures at the respective positions of the dough barrel 1 are made as close as possible.

The refrigeration output end of the air conditioner is communicated with the liquid inlet end of the heat exchange tube 3, and the refrigeration return end of the air conditioner is communicated with the liquid outlet end of the heat exchange tube 3. That is, the tub 1 is cooled by an air conditioner. It should be noted that the air conditioner is a mature product, and it is only necessary to convey the low-temperature liquid refrigerant flowing out of the throttle valve of the air conditioner to the liquid inlet end of the heat exchange tube 3 along the refrigeration output end of the air conditioner, and then convey the refrigerant along the extending direction of the heat exchange tube 3 until the refrigerant reaches the liquid outlet end of the heat exchange tube 3 and the refrigeration return end of the air conditioner in sequence.

Obviously, give face bucket 1 cooling through the air conditioner to can control the temperature more surely at the in-process of kneading dough, thereby realize low temperature and knead dough, avoid the yeast by the burn-out. The heat exchange tube 3 is accommodated by the heat insulation cavity 2 formed between the inner wall of the dough barrel 1 and the outer wall of the dough barrel 1, so that the heat exchange tube 3 can be prevented from being exposed in the external environment, energy waste is avoided, and the effective cooling effect of the dough barrel 1 is guaranteed. Through the heat exchange tube 3 encircle the outer wall of the inner shell of face bucket 1 and with the outer wall heat conduction connection of the inner shell of face bucket 1, so can make the temperature of face bucket 1 each position department close.

As a further preferred embodiment:

the insulating cavity 2 is filled with a polyurethane foaming agent. The polyurethane foaming agent can effectively prevent heat transfer, so that the heat transfer efficiency between the inner shell of the dough barrel 1 and the outer shell of the dough barrel 1 is greatly reduced, the heat exchange tube 3 mainly exchanges heat with the inner shell of the dough barrel 1, and the loss of cold energy is reduced.

As a further preferred embodiment:

referring to fig. 3 and 6, the dough mixer with refrigeration function further comprises a tray body 4, the upper end surface of the tray body 4 is connected with the inner shell of the dough barrel 1, and the lower end surface of the tray body 4 or the side surface of the tray body 4 is connected with the outer wall of the dough barrel 1 to cover the heat insulation cavity 2. In this manner, the tub 1 is supported by the tray body 4.

The tray body 4 is provided with a liquid inlet through hole 41 and liquid outlet through holes 42 which are parallel to the liquid inlet through hole 41 and are arranged at intervals along the self axial direction. The liquid inlet through holes 41 and the liquid outlet through holes 42 are distributed in a central symmetry manner with respect to the axis of the tray body 4.

The upper end surface of the tray body 4 is recessed downward to form an inlet tank 43 and an outlet tank 44.

One end of the liquid inlet groove 43 is communicated with the liquid inlet through hole 41, and the other end of the liquid inlet groove 43 penetrates through the side wall of the plate body 4 and is communicated with the heat insulation cavity 2, so that the heat exchange tube 3 is embedded.

One end of the liquid outlet groove 44 is communicated with the liquid inlet through hole 41, and the other end of the liquid outlet groove 44 penetrates through the side wall of the disc body 4 and is communicated with the heat insulation cavity 2, so that the heat exchange tube 3 is embedded.

Referring to fig. 4 and 5, the heat exchange tube 3 includes a first bottom coil 31, a side tube 32, and a second bottom coil 33, which are sequentially communicated. The first bottom coil pipe 31 has the same shape as the liquid inlet tank 43 and is embedded in the liquid inlet tank 43, the side pipe 32 surrounds the outer wall of the inner shell of the dough barrel 1 and is connected with the outer wall of the inner shell of the dough barrel 1 in a heat conduction manner, and the second bottom coil pipe 33 has the same shape as the liquid outlet tank 44 and is embedded in the liquid outlet tank 44.

Set up like this, not only realize all carrying out heat conduction with first chassis pipe 31, second chassis pipe 33 and face bucket 1 and be connected to make the temperature of face bucket 1 each position department more similar. Moreover, the first chassis pipe 31 and the second chassis pipe 33 are protected by the tray body 4, and the first chassis pipe 31 and the second chassis pipe 33 are prevented from being deformed by pressure.

As a further preferred embodiment:

referring to fig. 6, the liquid inlet tank 43 and the liquid outlet tank 44 are arranged centrally symmetrically with respect to the axis of the tray body 4. By the arrangement, the liquid inlet groove 43 and the liquid outlet groove 44 are fully distributed on the tray body 4 as much as possible, and the liquid inlet through hole 41 and the liquid outlet through hole 42 are allowed to be arranged near the axis of the tray body 4, so that the arrangement of a refrigerant channel on the whole machine is facilitated.

As a further preferred embodiment:

referring to fig. 6, the liquid inlet tank 43 includes a plurality of first circular arc sections 431 and a plurality of first connecting sections 432, ends of adjacent first circular arc sections 431 are connected through the first connecting sections 432, and radii of the plurality of first circular arc sections 431 gradually increase from inside to outside along a radial direction of the disc body 4. Obviously, the extension direction of the first chassis pipe 31 is the same as the extension direction of the liquid inlet tank 43.

The liquid outlet groove 44 includes a plurality of second circular arc sections 441 and a plurality of second joining sections 442, the end portions of the adjacent second circular arc sections 441 are connected through the second joining sections 442, and the radii of the plurality of second circular arc sections 441 gradually increase from inside to outside along the radial direction of the disc body 4. Similarly, the extension direction of the second chassis pipe 33 is the same as the extension direction of the effluent tank 44.

As a further preferred embodiment:

referring to fig. 6, the first engagement section 432 is a straight section (of course, an arc section is also possible), the first engagement section 432 extends along the radial direction of the disc body 4, and the outermost first engagement section 432 of the disc body 4 penetrates through the side wall of the disc body 4 from inside to outside along the radial direction of the disc body 4.

The second engaging section 442 is a straight section (of course, an arc section is also possible), and the second engaging section 442 extends in the radial direction of the disk 4; the outermost second engaging section 442 of the disk 4 penetrates the sidewall of the disk 4 from the inside to the outside in the radial direction of the disk 4.

In this way, the layout of the first chassis pipe 31 and the second chassis pipe 33 can be made more regular and dense.

As a further preferred embodiment:

it can be understood that the dough kneading machine can rotate by driving the dough barrel 1 outside the stirring rod driven by the motor, thereby improving the dough kneading efficiency.

Referring to fig. 3, the dough mixer with a refrigerating function further includes a rotation shaft 5 and a sealing structure 6.

The rotating shaft 5 is connected to the bottom of the disc body 4; the rotating shaft 5 is provided with a liquid inlet channel 51 and a liquid outlet channel 52, and the liquid inlet channel 51 and the liquid outlet channel 52 both extend along the axial direction of the rotating shaft 5.

The sealing structure 6 comprises a housing 61, a mechanical seal 62 and a spacer 63, wherein the housing 61 is provided with a liquid inlet cavity 611, the mechanical seal 62 is arranged in the liquid inlet cavity 611, and the mechanical seal 62 comprises two movable rings 621 and two fixed rings 622. The rotating shaft 5 is sleeved with the moving ring 621 and the stationary ring 622, the two stationary rings 622 are respectively abutted against the housing 61, and the two moving rings 621 are respectively located between the two stationary rings 622. The spacer 63 is disposed between the two movable rings 621. The rotating shaft 5 is radially provided with a liquid through hole 53 along the self direction, and two ends of the liquid through hole 53 are respectively communicated with the bottom end of the liquid inlet channel 51 and the liquid inlet cavity 611; the bottom end of the liquid outlet channel 52 penetrates through the side curved wall of the rotating shaft 5 or the bottom of the rotating shaft 5 (obviously, in the embodiment, the structure shown in fig. 3 is that the bottom end of the liquid outlet channel 52 penetrates through the bottom of the rotating shaft 5 downwards, and when the bottom end of the liquid outlet channel 52 penetrates through the side curved wall of the rotating shaft 5, the bottom end can be communicated to the refrigeration return end of the air conditioner through a conduit which follows the rotating shaft 5 to synchronously move).

Obviously, the circulation refrigeration of the dough mixing machine by the air conditioner can be realized under the condition of driving the dough barrel 1 to rotate.

As a further preferred embodiment:

referring to fig. 3, the housing 61 and the bottom end of the rotating shaft 5, one of the stationary rings 622 enclose to form a liquid outlet cavity 7, and the bottom end of the liquid outlet channel 52 penetrates downward to the liquid outlet cavity 7; the dough mixer with the refrigerating function further comprises a liquid outlet pipe 8, and the liquid outlet pipe 8 is communicated with the liquid outlet cavity 7.

As a further preferred embodiment:

referring to fig. 3, the spacer 63 is an annular barrier, the barrier is fixedly sleeved on the rotating shaft 5, the barrier is provided with a liquid passing hole 631 penetrating through the inner wall and the outer wall of the barrier, and the liquid passing hole 53 is communicated with the liquid inlet cavity 611 through the liquid passing hole 631; the liquid inlet cavity 611 is connected with a liquid inlet pipe 9.

As a further preferred embodiment: the heat insulation cavity 2 surrounds the whole circumference of the flour bucket 1, so that the heat exchange tubes 3 can also surround the whole circumference of the flour bucket 1, and the heat exchange tubes 3 can be replaced more uniformly.

The flow direction of the refrigerant of the dough mixer is as follows: the liquid inlet pipe 9 → the liquid inlet cavity 611 → the liquid passing hole 631 → the liquid passing hole 53 → the liquid inlet channel 51 → the liquid passing hole 41 → the first bottom coil pipe 31 → the side pipe 32 → the second bottom coil pipe 33 → the liquid outlet hole 42 → the liquid outlet channel 52 → the liquid outlet cavity 7 → the liquid outlet pipe 8.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. Flour-mixing machine with refrigeration function, its characterized in that includes:

the flour barrel (1) is used for containing fabric and water, and a heat insulation cavity (2) is formed between an inner shell of the flour barrel (1) and an outer shell of the flour barrel (1);

the heat exchange tube (3) is positioned in the heat insulation cavity (2), is wound around the outer wall of the inner shell of the dough barrel (1), and is in heat conduction connection with the outer wall of the inner shell of the dough barrel (1);

the refrigeration output end of the air conditioner is communicated with the liquid inlet end of the heat exchange tube (3), and the refrigeration return end of the air conditioner is communicated with the liquid outlet end of the heat exchange tube (3).

2. A dough mixer with refrigeration function as claimed in claim 1, wherein: the heat insulation cavity (2) is filled with a polyurethane foaming agent.

3. A dough mixer with refrigeration function as claimed in claim 1, wherein: the dough mixer with the refrigerating function further comprises a disc body (4), the upper end face of the disc body (4) is connected with the inner shell of the dough barrel (1), and the lower end face of the disc body (4) or the side face of the disc body (4) is connected with the outer wall of the dough barrel (1) to cover the heat insulation cavity (2);

the disc body (4) is provided with liquid inlet through holes (41) and liquid outlet through holes (42) which are parallel to the liquid inlet through holes (41) and are arranged at intervals along the axial direction of the disc body; the upper end surface of the tray body (4) sinks downwards to form a liquid inlet groove (43) and a liquid outlet groove (44);

one end of the liquid inlet groove (43) is communicated with the liquid inlet through hole (41), and the other end of the liquid inlet groove (43) penetrates through the side wall of the tray body (4) and is communicated with the heat insulation cavity (2);

one end of the liquid outlet groove (44) is communicated with the liquid inlet through hole (41), and the other end of the liquid outlet groove (44) penetrates through the side wall of the tray body (4) and is communicated with the heat insulation cavity (2);

the heat exchange tube (3) is including first bottom coil pipe (31), side pipe (32) and second bottom coil pipe (33) that communicate in order, the appearance of first bottom coil pipe (31) with the appearance of feed liquor groove (43) is the same in order to inlay to be in feed liquor groove (43), side pipe (32) encircle the outer wall of the inner shell of face bucket (1) is convoluteed, and with the outer wall heat conduction of the inner shell of face bucket (1) is connected, the appearance of second bottom coil pipe (33) with the appearance of drain tank (44) is the same in order to inlay to be in drain tank (44).

4. A dough mixer with a refrigerating function as claimed in claim 3, wherein: the liquid inlet groove (43) and the liquid outlet groove (44) are arranged in a central symmetry mode relative to the axis of the disc body (4).

5. A dough mixer with a refrigerating function as claimed in claim 3, wherein:

the liquid inlet groove (43) comprises a plurality of first circular arc sections (431) and a plurality of first connecting sections (432), the end parts of the adjacent first circular arc sections (431) are communicated through the first connecting sections (432), and the radiuses of the first circular arc sections (431) are gradually increased from inside to outside along the radial direction of the disc body (4);

the drain tank (44) comprises a plurality of second circular arc sections (441) and a plurality of second linking sections (442), the end portion of each second circular arc section (441) is connected through the corresponding second linking section (442), and the radius of each second circular arc section (441) is gradually increased from inside to outside along the radial direction of the disc body (4).

6. A dough mixer with refrigeration function as claimed in claim 5, wherein:

the first connecting section (432) is a straight line section, the first connecting section (432) extends along the radial direction of the disc body (4), and the first connecting section (432) at the outermost edge of the disc body (4) penetrates through the side wall of the disc body (4) from inside to outside along the radial direction of the disc body (4);

the second connecting section (442) is a straight line section, and the second connecting section (442) extends along the radial direction of the disc body (4); the second connecting section (442) at the outermost edge of the tray body (4) penetrates through the side wall of the tray body (4) from inside to outside along the radial direction of the tray body (4).

7. A dough mixer with a refrigerating function as claimed in claim 3, wherein: the dough mixing machine with the refrigerating function further comprises a rotating shaft (5) and a sealing structure (6);

the rotating shaft (5) is connected to the bottom of the disc body (4); the rotating shaft (5) is provided with a liquid inlet channel (51) and a liquid outlet channel (52), and the liquid inlet channel (51) and the liquid outlet channel (52) both extend along the axial direction of the rotating shaft (5);

the sealing structure (6) comprises a shell (61), a mechanical seal (62) and a partition (63), wherein the shell (61) is provided with a liquid inlet cavity (611), the mechanical seal (62) is arranged in the liquid inlet cavity (611), and the mechanical seal (62) comprises two movable rings (621) and two static rings (622); the rotating shaft (5) is sleeved with the movable ring (621) and the fixed rings (622), the two fixed rings (622) are respectively abutted against the shell (61), and the two movable rings (621) are respectively positioned between the two fixed rings (622); the spacer (63) is arranged between the two movable rings (621); the rotating shaft (5) is radially provided with a liquid through hole (53) along the self direction, and two ends of the liquid through hole (53) are respectively communicated with the bottom end of the liquid inlet channel (51) and the liquid inlet cavity (611); the bottom end of the liquid outlet channel (52) penetrates through the side curved surface wall of the rotating shaft (5) or the bottom of the rotating shaft (5).

8. A dough mixer with refrigeration function as claimed in claim 7, wherein: the shell (61) and the bottom end of the rotating shaft (5) and one of the static rings (622) enclose to form a liquid outlet cavity (7), and the bottom end of the liquid outlet channel (52) downwards penetrates through the liquid outlet cavity (7); the dough mixing machine with the refrigerating function further comprises a liquid outlet pipe (8), and the liquid outlet pipe (8) is communicated with the liquid outlet cavity (7).

9. A dough mixer with refrigeration function as claimed in claim 7, wherein: the isolating piece (63) is an annular baffle, the baffle is fixedly sleeved with the rotating shaft (5), the baffle is provided with a liquid passing hole (631) penetrating through the inner wall and the outer wall of the baffle, and the liquid passing hole (53) is communicated with the liquid inlet cavity (611) through the liquid passing hole (631); the liquid inlet cavity (611) is connected with a liquid inlet pipe (9).

10. A dough mixer with refrigeration function as claimed in claim 1, wherein: the heat insulation cavity (2) surrounds the whole circumference of the dough barrel (1).