Food thawing system special for vacuum sublimation rehydration thawing

Abstract

The invention relates to the field of thawing, in particular to a food thawing system special for vacuum sublimation rehydration thawing. Comprising a vacuum unfreezing box shell, a vacuum unfreezing box door, a rotating shaft, a sealing strip, a drying filter, a roots pump, a rotary vane pump, a vacuum exhaust pipe section, a liquid viewing mirror, an oil filling position, an oil discharging position, a heating plate, a heat insulation plate, a storage net, a supporting stand column, a supporting buckle, a four-claw hanging bracket and the like. According to the system, the vacuum thawing box is connected with the vacuum system, the heating plate system and the rehydration system, so that a vacuum sublimation stage and a rehydration heating stage in vacuum sublimation rehydration thawing can be realized, and frozen products can be efficiently thawed; and the system is provided with a part for adjusting the position of the heating plate, so that the system is suitable for a plurality of rehydration ports and the like in different unfreezing scenes, working condition parameters can be conveniently adjusted, and the vacuum sublimation rehydration unfreezing effect is further improved. Through the design of the invention, a new thought is provided for optimization of a food thawing process.

Description

Technical Field

[0001] This invention relates to the field of thawing, and more specifically to a food thawing system specifically designed for vacuum sublimation rehydration thawing. Background Technology

[0002] Meat, seafood, and vegetables are staple foods in people's daily lives. With societal development, people's dietary needs have shifted from simply satisfying basic hunger to pursuing higher-quality food. However, these foods generally have limited shelf life, especially meat and seafood; without effective preservation methods, it's difficult to maintain their superior quality during long-term storage. Currently, freezing technology is widely used for thawing food before further processing. Different thawing methods, due to their different principles, have varying impacts on the quality of thawed food. Vacuum sublimation rehydration thawing, as a novel and efficient thawing technology, utilizes the synergistic effect of a vacuum environment and heating plate to directly sublimate the ice crystals inside the frozen product, forming a large number of uniformly distributed microporous structures. These micropores increase the heat exchange area between water vapor and the frozen product, thereby enhancing the condensation heat exchange process and achieving faster and more uniform thawing, better maintaining the high quality of the thawed food. Simultaneously, the vacuum environment effectively inhibits the growth of aerobic microorganisms, further improving the hygiene and quality of the thawed food. This thawing method has the potential for highly efficient thawing. If a food thawing system specifically designed for this technology can be made more convenient to adjust the operating parameters, it will play a positive role in optimizing the food thawing process. Summary of the Invention

[0003] The purpose of this invention is to provide a food thawing system specifically designed for vacuum sublimation rehydration thawing. This system connects a vacuum thawing chamber with a vacuum system, a heating plate system, and a rehydration system. It enables the vacuum sublimation stage and the rehydration heating stage in vacuum sublimation rehydration thawing. Furthermore, it is equipped with components for adjusting the position of the heating plate and multiple rehydration ports suitable for different thawing scenarios, allowing for convenient adjustment of operating parameters and further improving the effect of vacuum sublimation rehydration thawing.

[0004] To achieve the above objectives, one embodiment of the present invention provides a food thawing system specifically designed for vacuum sublimation rehydration thawing, comprising a vacuum thawing chamber shell, a vacuum thawing chamber door, a rotating shaft, a sealing strip, a drying filter, a Roots pump, a rotary vane pump, a vacuum extraction pipe section, a sight glass, an oil filling port, an oil drain port, a heating plate, a heat insulation plate, a storage net, a support column, a support buckle, a four-claw hanger, a water temperature insulator, a water container, a water temperature controller, a knob, a heat-insulating rehydration pipe section, a rehydration valve section, a pressure regulating valve section, a vacuum valve, a heating plate temperature controller, a data display, a lifting box, and a temperature control data cable; The sealing strip includes a first sealing strip and a second sealing strip; The vacuum extraction pipe section includes a first vacuum extraction pipe section, a second vacuum extraction pipe section and a third vacuum extraction pipe section. The sight glass includes a first sight glass and a second sight glass; The refueling points include a first refueling point and a second refueling point; The oil drain includes a first oil drain and a second oil drain; The heating plate includes a first heating plate and a second heating plate; The supporting columns include a first supporting column, a second supporting column, a third supporting column, and a fourth supporting column; The support buckle includes a first support buckle, a second support buckle, a third support buckle, and a fourth support buckle; The knob includes a first knob, a second knob, and a third knob; The refill valve section includes a first refill valve section, a second refill valve section, a third refill valve section, a fourth refill valve section, a fifth refill valve section, a sixth refill valve section, a seventh refill valve section, an eighth refill valve section, a ninth refill valve section, a tenth refill valve section, an eleventh refill valve section, and a twelfth refill valve section. The data display includes a first data display, a second data display, a third data display, and a fourth data display; The temperature control data line includes a first temperature control data line and a second temperature control data line; The vacuum system includes a dryer filter, a Roots pump, a rotary vane pump, a first vacuum pumping section, a second vacuum pumping section, a third vacuum pumping section, a first sight glass, a second sight glass, a first oil filling port, a second oil filling port, a first oil drain port, a second oil drain port, and a vacuum valve. The heating plate system includes a first heating plate, a second heating plate, a heat insulation plate, a storage net, a first support column, a second support column, a third support column, a fourth support column, a first support buckle, a second support buckle, a third support buckle, a fourth support buckle, a four-claw hanger, a second knob, a third knob, a heating plate thermostat, a lifting box, a first temperature control data cable, and a second temperature control data cable; The refill system includes a water temperature insulator, a water container, a water temperature controller, a first knob, an insulated refill pipe section, a first refill valve section, a second refill valve section, a third refill valve section, a fourth refill valve section, a fifth refill valve section, a sixth refill valve section, a seventh refill valve section, an eighth refill valve section, a ninth refill valve section, a tenth refill valve section, an eleventh refill valve section, and a twelfth refill valve section; The outer shell and the door of the vacuum defrosting chamber are connected by a rotating shaft; The first sealing strip is attached to the front side of the vacuum defrosting chamber's outer shell; The second sealing strip is affixed to the back side of the vacuum defrosting chamber door; The drying filter is connected to the rear side of the vacuum defrosting chamber shell through the first vacuum extraction pipe section; The Roots pump is connected to the dryer filter via the second vacuum pumping section; The rotary vane pump is connected to the Roots pump via a third vacuum pumping pipe section; The first sight glass, the first filling port, and the first drain port are located on the Roots pump; The second sight glass, the second filling port, and the second drain port are located on the rotary vane pump; The vacuum valve is installed on the first vacuum pumping pipe section; The heating plate system consists of, from top to bottom, a lifting box, a four-claw hanger, a first heating plate, a storage net, a heat insulation plate, and a second heating plate. The first heating plate, the storage net, the heat insulation plate, and the second heating plate are connected by the first support column, the second support column, the third support column, and the fourth support column. A first support buckle, a second support buckle, a third support buckle, and a fourth support buckle are provided below the first heating plate; The lower four claws of the four-claw hanger are connected to the storage net, and the upper end of the four-claw hanger is connected to the lifting box. A third knob is installed on the lifting box; The first heating plate and the second heating plate are respectively connected to the heating plate thermostat via the first temperature control data line and the second temperature control data line. A second knob is provided on the heating plate thermostat; Except for the heating plate temperature controller, all other components belonging to the heating plate system are placed inside the vacuum defrosting box shell; The water container is placed inside the water temperature insulator; The water temperature controller is located in front of the water temperature insulator; The first knob is on the water temperature controller; The water container is connected to the insulated refill pipe section; The right channel of the insulated refill pipe section can be connected to the first refill valve section, the second refill valve section, the third refill valve section, the fourth refill valve section, the fifth refill valve section and the sixth refill valve section; The right channel of the insulated refill pipe section can be connected to the seventh, eighth, ninth, tenth, eleventh and twelfth refill valve sections. The first, second, third, fourth, fifth, and sixth refill valve sections are installed on the right side of the vacuum defrosting chamber shell and are evenly distributed. The seventh, eighth, ninth, tenth, eleventh, and twelfth refill valve sections are installed on the left side of the vacuum thawing chamber shell and are evenly distributed. The pressure regulating valve section is installed on the right side of the vacuum defrosting chamber casing; The first, second, third, and fourth data displays are installed below the heating plate thermostat.

[0005] Preferably, the outer shell, door, rotating shaft, storage net, support column, support buckle, and lifting box of the vacuum defrosting box are all made of stainless steel.

[0006] Preferably, polyurethane is selected as the material for the insulation board.

[0007] Preferably, the water container is made of glass.

[0008] Preferably, the distances from the first heating plate and the second heating plate to the surface of the frozen product must be adjusted to be consistent before the frozen product can be thawed.

[0009] Preferably, the first heating plate and the second heating plate should maintain the same temperature.

[0010] Preferably, the first support buckle, the second support buckle, the third support buckle, and the fourth support buckle should be kept at the same height when thawing the frozen product.

[0011] Preferably, the upper stretching area of ​​the four-claw hanger is made of bendable plastic, and the lower four-claw area of ​​the four-claw hanger is made of stainless steel.

[0012] Preferably, the insulated water refill pipe section consists of a rigid plastic pipe with an outer layer of insulation cotton.

[0013] Preferably, the operation of the present invention must be strictly carried out in accordance with the vacuum sublimation rehydration thawing operation procedure.

[0014] This invention designs a food thawing system specifically for vacuum sublimation rehydration thawing. This system integrates a vacuum thawing chamber with a vacuum system, a heating plate system, and a rehydration system, enabling efficient thawing of frozen products by combining the vacuum sublimation and rehydration heating stages. Furthermore, the system is equipped with components for adjusting the heating plate position and multiple rehydration ports suitable for different thawing scenarios, allowing for convenient adjustment of operating parameters and further enhancing the effectiveness of vacuum sublimation rehydration thawing. This invention provides a new approach to optimizing food thawing processes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the food thawing system of the present invention, which is specifically used for vacuum sublimation rehydration thawing (viewed from the front upper side to the back).

[0016] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the food thawing system of the present invention, which is specifically used for vacuum sublimation rehydration thawing (viewed from the rear upper side forward).

[0017] Figure 3 This is a three-dimensional structural diagram of the vacuum system of the food thawing system specifically designed for vacuum sublimation rehydration thawing according to the present invention.

[0018] Figure 4 This is a schematic diagram of the connection of the heating plate system of the food thawing system for vacuum sublimation rehydration thawing of the present invention (view 1: except for 21.2-first knob, 26-heating plate thermostat, 29.1-first temperature control data line and 29.2-second temperature control data line, all are viewed from the front and slightly above).

[0019] Figure 5 This is a schematic diagram of the connection of the heating plate system of the food thawing system of the present invention, which is specifically used for vacuum sublimation rehydration thawing (view 2: except for 21.2-first knob, 26-heating plate temperature controller, 29.1-first temperature control data line and 29.2-second temperature control data line, all are viewed from the rear from the front and slightly below).

[0020] Figure 6 This is a three-dimensional structural diagram of the rehydration system of the food thawing system specifically designed for vacuum sublimation rehydration thawing according to the present invention.

[0021] Component labels in the diagram: 1-Vacuum defrosting chamber outer shell, 2-Vacuum defrosting chamber door, 3-Rotating shaft, 4.1-First sealing strip, 4.2-Second sealing strip, 5-Drier filter, 6-Roots pump, 7-Rotary vane pump, 8.1-First vacuum extraction pipe section, 8.2-Second vacuum extraction pipe section, 8.3-Third vacuum extraction pipe section, 9.1-First sight glass, 9.2-Second sight glass, 10.1-First oil filling port, 10.2-Second oil filling port, 11.1- 11.2-Second oil drain, 12.1-First heating plate, 12.2-Second heating plate, 13-Heat insulation plate, 14-Storage net, 15.1-First support column, 15.2-Second support column, 15.3-Third support column, 15.4-Fourth support column, 16.1-First support buckle, 16.2-Second support buckle, 16.3-Third support buckle, 16.4-Fourth support buckle, 17-Four-claw hanger, 18-Water 19-Water container, 20-Water temperature controller, 21.1-First knob, 21.2-Second knob, 21.3-Third knob, 22-Insulated refill pipe section, 23.1-First refill valve section, 23.2-Second refill valve section, 23.3-Third refill valve section, 23.4-Fourth refill valve section, 23.5-Fifth refill valve section, 23.6-Sixth refill valve section, 23.7-Seventh refill valve section, 23.8-Eighth refill valve section, 23. 9-Ninth refill valve section, 23.10-Tenth refill valve section, 23.11-Eleventh refill valve section, 23.12-Twelfth refill valve section, 24-Pressure stabilizing valve section, 25-Vacuum valve, 26-Heating plate thermostat, 27.1-First data display, 27.2-Second data display, 27.3-Third data display, 27.4-Fourth data display, 28-Lifting box, 29.1-First temperature control data line and 29.2-Second temperature control data line. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings and specific examples.

[0023] like Figure 1 As shown, this is a three-dimensional structural diagram (viewed from the upper front to the rear) of a food thawing system specifically designed for vacuum sublimation rehydration thawing according to an embodiment of the present invention; Figure 2 As shown, this is a three-dimensional structural diagram (viewed from the upper rear) of a food thawing system specifically designed for vacuum sublimation rehydration thawing according to an embodiment of the present invention; Figure 3 As shown, this is a three-dimensional structural diagram of a vacuum system for a food thawing system specifically designed for vacuum sublimation rehydration thawing according to an embodiment of the present invention; as shown... Figure 4As shown, a connection diagram of the heating plate system of a food thawing system specifically designed for vacuum sublimation rehydration thawing according to an embodiment of the present invention is provided (view 1: except for 21.2 - first knob, 26 - heating plate thermostat, 29.1 - first temperature control data line and 29.2 - second temperature control data line, all views are from the front-upward direction). Figure 5 As shown, a connection diagram of the heating plate system of a food thawing system specifically designed for vacuum sublimation rehydration thawing according to an embodiment of the present invention is provided (view 2: except for 21.2 - first knob, 26 - heating plate thermostat, 29.1 - first temperature control data line and 29.2 - second temperature control data line, all views are from the lower front direction). Figure 6 The figure shows a three-dimensional structural diagram of a rehydration system for a food thawing system specifically designed for vacuum sublimation rehydration thawing, according to an embodiment of the present invention. The diagram includes the following components: a vacuum thawing chamber shell 1, a vacuum thawing chamber door 2, a rotating shaft 3, a first sealing strip 4.1, a second sealing strip 4.2, a drying filter 5, a Roots pump 6, a rotary vane pump 7, a first vacuum extraction pipe section 8.1, a second vacuum extraction pipe section 8.2, a third vacuum extraction pipe section 8.3, a first sight glass 9.1, and a second... 9.2 Sight glass, 10.1 First filling port, 10.2 Second filling port, 11.1 First drain port, 11.2 Second drain port, 12.1 First heating plate, 12.2 Second heating plate, 13 Heat insulation plate, 14 Storage net, 15.1 First support column, 15.2 Second support column, 15.3 Third support column, 15.4 Fourth support column, 16.1 First support clip, 16.2 Second support clip, 16.3 Third support clip. 16.4 Four-support buckle, 17 Four-claw hanger, 18 Water temperature insulator, 19 Water container, 20 Water temperature controller, 21.1 First knob, 21.2 Second knob, 21.3 Third knob, 22 Insulated refill pipe section, 23.1 First refill valve section, 23.2 Second refill valve section, 23.3 Third refill valve section, 23.4 Fourth refill valve section, 23.5 Fifth refill valve section, 23.6 Sixth refill valve section, 23.7 Seventh refill valve section, 23.8 Eighth refill valve section. Valve section 23.8, Ninth refill valve section 23.9, Tenth refill valve section 23.10, Eleventh refill valve section 23.11, Twelfth refill valve section 23.12, Pressure stabilizing valve section 24, Vacuum valve 25, Heating plate thermostat 26, First data display 27.1, Second data display 27.2, Third data display 27.3, Fourth data display 27.4, Lifting box 28, First temperature control data line 29.1 and Second temperature control data line 29.2.

[0024] In the discussion of this embodiment, unless otherwise specified, the main viewing angle is the view from behind the vacuum defrost chamber door 2 and looking directly at the vacuum defrost chamber door 2; unless otherwise specified, the wall surface of the vacuum defrost chamber outer shell 1 refers to the outer wall surface; the left and right sides of the components are determined according to the main viewing angle and the names do not change due to the change of view.

[0025] The vacuum system includes a dryer filter 5, a Roots pump 6, a rotary vane pump 7, a first vacuum pumping section 8.1, a second vacuum pumping section 8.2, a third vacuum pumping section 8.3, a first sight glass 9.1, a second sight glass 9.2, a first oil filling port 10.1, a second oil filling port 10.2, a first oil drain port 11.1, a second oil drain port 11.2, and a vacuum valve 25.

[0026] The heating plate system includes a first heating plate 12.1, a second heating plate 12.2, a heat insulation plate 13, a storage net 14, a first support column 15.1, a second support column 15.2, a third support column 15.3, a fourth support column 15.4, a first support buckle 16.1, a second support buckle 16.2, a third support buckle 16.3, a fourth support buckle 16.4, a four-claw hanger 17, a second knob 21.2, a third knob 21.3, a heating plate thermostat 26, a lifting box 28, a first temperature control data cable 29.1, and a second temperature control data cable 29.2.

[0027] The refill system includes a water temperature insulator 18, a water container 19, a water temperature controller 20, a first knob 21.1, an insulated refill pipe section 22, a first refill valve section 23.1, a second refill valve section 23.2, a third refill valve section 23.3, a fourth refill valve section 23.4, a fifth refill valve section 23.5, a sixth refill valve section 23.6, a seventh refill valve section 23.7, an eighth refill valve section 23.8, a ninth refill valve section 23.9, a tenth refill valve section 23.10, an eleventh refill valve section 23.11, and a twelfth refill valve section 23.12.

[0028] The vacuum defrosting chamber outer shell 1 and the vacuum defrosting chamber door 2 are connected by a rotating shaft 3. The vacuum defrosting chamber door 2 can rotate about the vacuum defrosting chamber outer shell 1 to open and close by rotating the shaft 3. The first sealing strip 4.1 is affixed to the front side of the vacuum defrosting chamber outer shell 1; With the vacuum defrosting chamber door 2 closed, the second sealing strip 4.2 is attached to the rear side of the vacuum defrosting chamber door 2; After rotating the vacuum defrost box door 2 to be parallel to the vacuum defrost box outer shell 1, the first sealing strip 4.1 and the second sealing strip 4.2 are tightly attached, thus closing the vacuum defrost box door 2; The drying filter 5 is connected to the rear side of the vacuum defrosting chamber shell 1 via the first vacuum extraction pipe section 8.1; The Roots pump 6 is connected to the dryer filter 5 via the second vacuum pumping pipe section 8.2; The rotary vane pump 7 is connected to the Roots pump 6 via the third vacuum pumping pipe section 8.3; The first sight glass 9.1, the first filling port 10.1, and the first drain port 11.1 are on the Roots pump 6, with the first filling port 10.1 located above the first drain port 11.1; The second sight glass 9.2, the second filling port 10.2 and the second drain port 11.2 are on the rotary vane pump 7, with the second filling port 10.2 located above the second drain port 11.2; Vacuum valve 25 is installed on the first vacuum pumping pipe section 8.1; The heating plate system consists of, from top to bottom, a lifting box 28, a four-claw hanger 17, a first heating plate 12.1, a storage net 14, a heat insulation plate 13, and a second heating plate 12.2; The first heating plate 12.1, the storage net 14, the heat insulation plate 13, and the second heating plate 12.2 are connected by the first support column 15.1, the second support column 15.2, the third support column 15.3, and the fourth support column 15.4. The first support column 15.1, the second support column 15.2, the third support column 15.3, and the fourth support column 15.4 pass through the four corners of each component of the first heating plate 12.1, the storage net 14, the heat insulation plate 13, and the second heating plate 12.2, respectively. A first support buckle 16.1, a second support buckle 16.2, a third support buckle 16.3 and a fourth support buckle 16.4 are provided below the first heating plate 12.1; The lower four claws of the four-claw hanger 17 are connected to the storage net 14, and the upper end of the four-claw hanger 17 is connected to the lifting box 28. A third knob 21.3 is provided on the lifting box 28; The first heating plate 12.1 and the second heating plate 12.2 are respectively connected to the heating plate thermostat 26 via the first temperature control data line 29.1 and the second temperature control data line 29.2; A second knob 21.2 is provided on the heating plate temperature controller 26; Except for the heating plate temperature controller 26, all other components belonging to the heating plate system are placed inside the vacuum defrosting box shell 1, and are positioned in the center. The lower two-thirds of the water container 19 is inside the water temperature insulator 18, and the upper one-third of the water container 19 is outside the water temperature insulator 18. The water temperature controller 20 is located before the water temperature insulator 18; The first knob 21.1 is on the water temperature controller 20; The water container 19 is connected to the insulated water refill pipe section 22, which is a "one inlet and two outlet" pipe section; The right channel of the insulated water-refilling pipe section 22 can be connected to the first water-refilling valve section 23.1, the second water-refilling valve section 23.2, the third water-refilling valve section 23.3, the fourth water-refilling valve section 23.4, the fifth water-refilling valve section 23.5 and the sixth water-refilling valve section 23.6; The right channel of the insulated water-refilling pipe section 22 can be connected to the seventh water-refilling valve section 23.7, the eighth water-refilling valve section 23.8, the ninth water-refilling valve section 23.9, the tenth water-refilling valve section 23.10, the eleventh water-refilling valve section 23.11 and the twelfth water-refilling valve section 23.12; The first refill valve section 23.1, the second refill valve section 23.2, the third refill valve section 23.3, the fourth refill valve section 23.4, the fifth refill valve section 23.5, and the sixth refill valve section 23.6 are installed on the right side of the vacuum defrosting chamber shell 1, and are evenly distributed (two rows and three columns). The seventh refill valve section 23.7, the eighth refill valve section 23.8, the ninth refill valve section 23.9, the tenth refill valve section 23.10, the eleventh refill valve section 23.11 and the twelfth refill valve section 23.12 are installed on the left side of the vacuum defrosting chamber shell 1, and are evenly distributed (two rows and three columns). The pressure regulating valve section 24 is installed on the lower right side of the vacuum defrosting chamber casing; The first data display 27.1, the second data display 27.2, the third data display 27.3 and the fourth data display 27.4 are installed below the heating plate thermostat 26.

[0029] The first sealing strip 4.1 and the second sealing strip 4.2 are used to seal the outer shell 1 and the door 2 of the vacuum defrosting chamber, and to enhance the fit between the outer shell 1 and the door 2 during system operation.

[0030] The dryer filter 5 is used to absorb water vapor to prevent excess water vapor from being drawn into the Roots pump 6 and the rotary vane pump 7 during vacuum system operation, which would cause a decrease in the performance of the Roots pump 6 and the rotary vane pump 7.

[0031] The Roots pump 6 and the rotary vane pump 7 work together to extract air from the environment inside the vacuum thawing chamber 1, creating a vacuum environment.

[0032] The first vacuum pumping section 8.1, the second vacuum pumping section 8.2, and the third vacuum pumping section 8.3 are used to allow the air drawn away by the Roots pump 6 and the rotary vane pump 7 to pass through.

[0033] The first sight glass 9.1 and the second sight glass 9.2 are used to observe the lubricating oil usage in the Roots pump 6 and the rotary vane pump 7, respectively.

[0034] The first lubrication port 10.1 and the second lubrication port 10.2 are used to add lubricating oil to the Roots pump 6 and the rotary vane pump 7, respectively.

[0035] The first oil drain 11.1 and the second oil drain 11.2 are used to drain the unused lubricating oil from the Roots pump 6 and the rotary vane pump 7, respectively.

[0036] Both the first heating plate 12.1 and the second heating plate 12.2 are used to provide heat to the frozen product. The distance from the first heating plate 12.1 and the second heating plate 12.2 to the surface of the frozen product is the same. The temperature of the first heating plate 12.1 and the second heating plate 12.2 is the same. They are uniformly controlled by the heating plate thermostat 26, and the control signal is transmitted by the first temperature control data line 29.1 and the second temperature control data line 29.2. The heating plate thermostat 26 is adjusted by rotating the second knob 21.2. The temperature parameters will be displayed on the heating plate thermostat 26.

[0037] The heat insulation plate 13 is used to prevent the second heating plate 12.2 from directly contacting the outer shell 1 of the vacuum defrosting chamber, thereby preventing the heat of the second heating plate 12.2 from being directly transferred to the inner wall surface of the outer shell 1 of the vacuum defrosting chamber, and preventing it from affecting the defrosting process.

[0038] The storage net 14 is used to place frozen products.

[0039] The first support buckle 16.1, the second support buckle 16.2, the third support buckle 16.3, and the fourth support buckle 16.4 are used to adjust the position of the first heating plate 12.1. The first support buckle 16.1, the second support buckle 16.2, the third support buckle 16.3, and the fourth support buckle 16.4 are kept at the same height. The first support buckle 16.1, the second support buckle 16.2, the third support buckle 16.3, and the fourth support buckle 16.4 are respectively inserted into the first support column 15.1, the second support column 15.2, the third support column 15.3, and the fourth support column 15.4.

[0040] The four-claw hanger 17 works in conjunction with the lifting box 28 to adjust the position of the storage net 14. Rotating the third knob 21.3 allows the four-claw hanger 17 to move the storage net 14 up and down. Rotating the third knob 21.3 clockwise raises the net and rotating it counterclockwise lowers it.

[0041] The water container 19 is used to hold purified water, and the amount of purified water shall not exceed half the capacity of the water container 19.

[0042] The water temperature keeper 18 is used to keep the pure water in the water container 19 warm. The temperature is adjusted by the water temperature controller 20. The adjustment operation is to rotate the first knob 21.1 to adjust the water temperature to the required temperature, which will be displayed on the water temperature controller 20.

[0043] The insulated refill pipe section 22 is composed of a rigid plastic pipe with an outer layer of insulation cotton. It is used to allow water vapor generated by the refill system to pass through, and to ensure that the water vapor has an insulation function when passing through, so as not to cause large temperature changes in the water vapor.

[0044] The first refill valve section 23.1, the second refill valve section 23.2, the third refill valve section 23.3, the fourth refill valve section 23.4, the fifth refill valve section 23.5, the sixth refill valve section 23.6, the seventh refill valve section 23.7, the eighth refill valve section 23.8, the ninth refill valve section 23.9, the tenth refill valve section 23.10, the eleventh refill valve section 23.11, and the twelfth refill valve section 23.12 are used to control whether water vapor can enter the outer shell 1 of the vacuum defrosting chamber; tighten the first refill valve section 23.1, the second refill valve section 23.2, the third refill valve section 23.3, the fourth refill valve section 23.4, the fifth refill valve section 23.5, the sixth refill valve section 23.6, and the seventh refill valve section 23.12. Valves on sections 23.7, 23.8, 23.9, 23.10, 23.11, and 23.12 of the eighth, ninth, tenth, eleventh, and twelfth refill valve sections will close the corresponding passages; loosening the valves on sections 23.1, 23.2, 23.3, 23.4, 23.5, 23.6, 23.7, 23.8, 23.9, 23.10, 23.11, and 23.12 of the eleventh and twelfth refill valve sections will open the corresponding passages.

[0045] The insulated refill pipe section 22 has the same pipe diameter as the first refill valve section 23.1, the second refill valve section 23.2, the third refill valve section 23.3, the fourth refill valve section 23.4, the fifth refill valve section 23.5, the sixth refill valve section 23.6, the seventh refill valve section 23.7, the eighth refill valve section 23.8, the ninth refill valve section 23.9, the tenth refill valve section 23.10, the eleventh refill valve section 23.11, and the twelfth refill valve section 23.12. When using it, simply slip it on and seal it with tape.

[0046] The pressure stabilizing valve section 24 is used to balance the pressure after thawing. It can loosen the valve on top to restore the air pressure inside the vacuum thawing chamber shell 1 to atmospheric pressure, thereby opening the vacuum thawing chamber door 2 that is being sucked shut.

[0047] Vacuum valve 25 is used to control whether the passage of the vacuum system is open. Tightening vacuum valve 25 closes the passage of the vacuum system, and loosening vacuum valve 25 opens the passage of the vacuum system.

[0048] The first data display 27.1, the second data display 27.2, the third data display 27.3, and the fourth data display 27.4 can be connected to different sensors to display different status parameters.

[0049] The vacuum defrosting chamber shell 1, vacuum defrosting chamber door 2, rotating shaft 3, storage net 14, support column, support buckle and lifting box 28 are all made of stainless steel.

[0050] The insulation board 13 is made of polyurethane.

[0051] The water container 19 is made of glass.

[0052] The upper extension area of ​​the four-claw hanger 17 is made of bendable plastic to ensure that it can be stored in the lifting box 28, while the lower four-claw area of ​​the four-claw hanger 17 is made of stainless steel.

[0053] The operation of this invention must be strictly carried out in accordance with the vacuum sublimation rehydration thawing procedure.

[0054] The operation process of this invention is as follows: 1) Select the required refill valve section, insert the insulated refill pipe section 22, and tighten all other refill valve sections, pressure stabilizing valve section 24 and vacuum valve 25. 2) Add an appropriate amount of purified water to the water container 19 and turn on the water temperature controller 20 to heat the purified water to the required temperature; 3) Measure the thickness of the frozen product and adjust the position of the first heating plate 12.1 and the storage net 14; 4) Turn on the heating plate thermostat 26, select the second knob 21.2 to adjust the heating plate temperature to the desired temperature; 5) After the temperatures of the first heating plate 12.1 and the second heating plate 12.2 have stabilized, spread the frozen food evenly on the storage rack 14; 6) Loosen vacuum valve 25 and turn on rotary vane pump 7; 7) Close the vacuum defrost chamber door 2 and seal the vacuum defrost chamber outer shell 1 and vacuum defrost chamber door 2 with the first sealing strip 4.1 and the second sealing strip 4.2; 8) After the pressure inside the vacuum thawing chamber 1 drops to below 10,000 Pa, turn on the Roots pump 6 to allow the pressure inside the vacuum thawing chamber 1 to continue to drop to about 30 Pa and stabilize. During this process, some of the ice crystals inside the frozen product will sublimate and form a large number of microporous structures. 9) After the vacuum system has been running for the expected time, turn off the Roots pump 6 and the rotary vane pump 7 in sequence, then tighten the vacuum valve 25, and then immediately loosen the refill valve section that needs to be used. Because there is a pressure difference between the vacuum thawing chamber shell 1 and the water container 19, and the pressure inside the vacuum thawing chamber shell 1 is extremely low, the pure water in the water container 19 will quickly form water vapor and be introduced into the vacuum thawing chamber shell 1 to condense and exchange heat with the frozen products. 10) The core temperature data of the frozen product will be displayed on the data display. When the core temperature of the frozen product has reached the required level, the thawing is complete. 11) Tighten all the refill valve sections, then loosen the pressure regulating valve section 24 to gradually restore the pressure inside the vacuum defrosting chamber 1 to atmospheric pressure; 12) Open the vacuum defrosting box door 2 and take out the defrosted food.

[0055] The dryer filter 5 added to the vacuum system in this invention can effectively prevent water vapor from being drawn into the Roots pump 6 and the rotary vane pump 7 due to the pumping action of the Roots pump 6 and the rotary vane pump 7, which can greatly improve the performance of the Roots pump 6 and the rotary vane pump 7 and extend their service life.

[0056] The present invention employs double-sided radiant heating in the heating plate system, which can make the heat transfer more uniform and avoid local overheating during the thawing process of frozen products.

[0057] The present invention employs an operation in the rehydration system where water vapor is generated externally and then introduced into the outer shell 1 of the vacuum thawing chamber. This operation only requires controlling the rehydration temperature and can directly generate sufficient saturated water vapor to condense and exchange heat with the frozen product. Therefore, it is not necessary to control the variable parameter of the rehydration amount, which simplifies the operation of the thawing process and makes it more convenient and reliable.

[0058] Before using this invention, it is necessary to check that all refill valve sections, pressure regulating valve section 24 and vacuum valve 25 are in the required open / closed state.

[0059] Different refill valve sections can be selected for use depending on the required steam jet height.

[0060] In this embodiment, apart from the detachable insulated refill pipe section 2 and the refill valve section, the connection relationship of the other components cannot be changed. However, the relative positions between the components can be adjusted according to the location requirements required for actual application according to the present invention. For example, the water temperature insulator 18 and the water container 19 can be placed above the vacuum defrosting box shell 1 instead of below it.

[0061] The above embodiments are merely illustrative of the design principles and uses of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A food thawing system specifically designed for vacuum sublimation rehydration thawing, characterized in that: The food thawing system specifically designed for vacuum sublimation rehydration thawing includes a vacuum thawing chamber shell, a vacuum thawing chamber door, a rotating shaft, a sealing strip, a drying filter, a Roots pump, a rotary vane pump, a vacuum extraction pipe section, a sight glass, an oil filling port, an oil drain port, a heating plate, a heat insulation plate, a storage net, support columns, support buckles, a four-claw hanger, a water temperature insulator, a water container, a water temperature controller, a knob, a heat-insulating rehydration pipe section, a rehydration valve section, a pressure regulating valve section, a vacuum valve, a heating plate temperature controller, a data display, a lifting box, and a temperature control data cable. The sealing strip includes a first sealing strip and a second sealing strip; The vacuum extraction pipe section includes a first vacuum extraction pipe section, a second vacuum extraction pipe section and a third vacuum extraction pipe section. The sight glass includes a first sight glass and a second sight glass; The refueling points include a first refueling point and a second refueling point; The oil drain includes a first oil drain and a second oil drain; The heating plate includes a first heating plate and a second heating plate; The supporting columns include a first supporting column, a second supporting column, a third supporting column, and a fourth supporting column; The support buckle includes a first support buckle, a second support buckle, a third support buckle, and a fourth support buckle; The knob includes a first knob, a second knob, and a third knob; The refill valve section includes a first refill valve section, a second refill valve section, a third refill valve section, a fourth refill valve section, a fifth refill valve section, a sixth refill valve section, a seventh refill valve section, an eighth refill valve section, a ninth refill valve section, a tenth refill valve section, an eleventh refill valve section, and a twelfth refill valve section. The data display includes a first data display, a second data display, a third data display, and a fourth data display; The temperature control data line includes a first temperature control data line and a second temperature control data line; The vacuum system includes a dryer filter, a Roots pump, a rotary vane pump, a first vacuum pumping section, a second vacuum pumping section, a third vacuum pumping section, a first sight glass, a second sight glass, a first oil filling port, a second oil filling port, a first oil drain port, a second oil drain port, and a vacuum valve. The heating plate system includes a first heating plate, a second heating plate, a heat insulation plate, a storage net, a first support column, a second support column, a third support column, a fourth support column, a first support buckle, a second support buckle, a third support buckle, a fourth support buckle, a four-claw hanger, a second knob, a third knob, a heating plate thermostat, a lifting box, a first temperature control data cable, and a second temperature control data cable; The refill system includes a water temperature insulator, a water container, a water temperature controller, a first knob, an insulated refill pipe section, a first refill valve section, a second refill valve section, a third refill valve section, a fourth refill valve section, a fifth refill valve section, a sixth refill valve section, a seventh refill valve section, an eighth refill valve section, a ninth refill valve section, a tenth refill valve section, an eleventh refill valve section, and a twelfth refill valve section; The outer shell and the door of the vacuum defrosting chamber are connected by a rotating shaft; The first sealing strip is attached to the front side of the vacuum defrosting chamber's outer shell; The second sealing strip is affixed to the back side of the vacuum defrosting chamber door; The drying filter is connected to the rear side of the vacuum defrosting chamber shell through the first vacuum extraction pipe section; The Roots pump is connected to the dryer filter via the second vacuum pumping section; The rotary vane pump is connected to the Roots pump via a third vacuum pumping pipe section; The first sight glass, the first filling port, and the first drain port are located on the Roots pump; The second sight glass, the second filling port, and the second drain port are located on the rotary vane pump; The vacuum valve is installed on the first vacuum pumping pipe section; The heating plate system consists of, from top to bottom, a lifting box, a four-claw hanger, a first heating plate, a storage net, a heat insulation plate, and a second heating plate. The first heating plate, the storage net, the heat insulation plate, and the second heating plate are connected by the first support column, the second support column, the third support column, and the fourth support column. A first support buckle, a second support buckle, a third support buckle, and a fourth support buckle are provided below the first heating plate; The lower four claws of the four-claw hanger are connected to the storage net, and the upper end of the four-claw hanger is connected to the lifting box. A third knob is installed on the lifting box; The first heating plate and the second heating plate are respectively connected to the heating plate thermostat via the first temperature control data line and the second temperature control data line. A second knob is provided on the heating plate thermostat; Except for the heating plate temperature controller, all other components belonging to the heating plate system are placed inside the vacuum defrosting box shell; The water container is placed inside the water temperature insulator; The water temperature controller is located in front of the water temperature insulator; The first knob is on the water temperature controller; The water container is connected to the insulated refill pipe section; The right channel of the insulated refill pipe section can be connected to the first refill valve section, the second refill valve section, the third refill valve section, the fourth refill valve section, the fifth refill valve section and the sixth refill valve section; The right channel of the insulated refill pipe section can be connected to the seventh, eighth, ninth, tenth, eleventh and twelfth refill valve sections. The first, second, third, fourth, fifth, and sixth refill valve sections are installed on the right side of the vacuum defrosting chamber shell and are evenly distributed. The seventh, eighth, ninth, tenth, eleventh, and twelfth refill valve sections are installed on the left side of the vacuum thawing chamber shell and are evenly distributed. The pressure regulating valve section is installed on the right side of the vacuum defrosting chamber casing; The first, second, third, and fourth data displays are installed below the heating plate thermostat.

2. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The outer shell, door, rotating shaft, storage net, support column, support buckle, and lifting box of the vacuum defrosting box are all made of stainless steel.

3. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: Polyurethane is chosen as the material for the insulation board.

4. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: Glass is chosen as the material for the water container.

5. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The distances between the first and second heating plates and the surface of the frozen food must be adjusted to be consistent before the frozen food can be thawed.

6. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The first heating plate and the second heating plate must maintain the same temperature.

7. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The first, second, third, and fourth support buckles must be kept at the same height when thawing frozen products.

8. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The upper tension area of ​​the four-claw hanger is made of flexible plastic, while the lower four-claw area is made of stainless steel.

9. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The insulated water supply pipe section consists of a rigid plastic pipe with an outer layer of insulation cotton.

10. The food thawing system specifically designed for vacuum sublimation rehydration thawing according to claim 1, characterized in that: The operation of this invention must be strictly carried out in accordance with the vacuum sublimation rehydration thawing procedure.

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