A flash freezing pre-cooling device

Abstract

This invention relates to the field of quick-freezing pre-cooling equipment, and more particularly to a quick-freezing pre-cooling device, comprising a pre-cooling chamber, wherein diverter racks are installed on the front and rear sides of the top of the pre-cooling chamber, and a fixed frame is installed in the middle of the top of the pre-cooling chamber. A straight bar is provided on the lower side of the fixed frame, and multiple toothed segments are provided on both sides of the straight bar. An electric push rod is installed at one end of the straight bar, and the end of the electric push rod away from the straight bar is fixedly connected to the inner side wall of the pre-cooling chamber. Toothed rings are engaged with both sides of the straight bar, and spray pipes are fixedly connected to the middle of one side of each toothed ring. A sliding sleeve is rotatably connected to the end of each spray pipe away from the toothed ring, and the end of the sliding sleeve away from the spray pipe is rotatably connected to the diverter rack. This invention allows for adjustment of the angle and range of the spray pipes, which can be flexibly adapted to the material size, avoiding excessive spraying or spray blind spots. Furthermore, during the adjustment process, the connecting rod can drive the air outlet pipe to move synchronously, ensuring stable cooling operation.

Description

Technical Field

[0001] This invention relates to the field of quick-freezing and pre-cooling equipment, and more particularly to a quick-freezing and pre-cooling device. Background Technology

[0002] Currently, quick-freezing precooling technology is widely used in food processing, pharmaceutical storage, and other fields requiring rapid cooling and preservation. However, existing equipment has many shortcomings. Most devices achieve cooling only through unidirectional spraying or blowing, which easily leads to uneven heating of the material, resulting in incomplete cooling in certain areas, prolonging the precooling cycle, and affecting production efficiency. Furthermore, traditional devices lack a flexible spray range adjustment mechanism, easily leading to excessive spraying and water waste when dealing with materials of different sizes and shapes, or insufficient spray coverage resulting in poor cooling effects. In addition, some devices lack a complete water and cold air circulation system, resulting in low utilization rates of cooling water and cold air, increasing operating costs. Moreover, due to structural design flaws, some devices are prone to cold air and cooling water dispersion and loss, not only reducing cooling efficiency but also potentially causing microbial growth risks due to localized temperature fluctuations. These shortcomings make it difficult to meet the demands of modern production for efficient, energy-saving, and safe precooling. Therefore, we propose a quick-freezing precooling device to address the aforementioned problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a quick-freezing precooling device.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a quick-freezing pre-cooling device, comprising a pre-cooling chamber, wherein diverter racks are installed on the front and rear sides of the top of the pre-cooling chamber, a fixed frame is installed in the middle of the top of the pre-cooling chamber, a straight bar is provided on the lower side of the fixed frame, multiple toothed segments are provided on both sides of the straight bar, an electric push rod is installed on one end of the straight bar, and the end of the electric push rod away from the straight bar is fixedly connected to the inner side wall of the pre-cooling chamber, toothed rings are engaged on both sides of the straight bar, and spray pipes are fixedly connected to the middle of one side of each toothed ring, the spray pipes being away from the inner side wall of the pre-cooling chamber. Each toothed ring has a sliding sleeve rotatably connected to one end. The end of the sliding sleeve away from the spray pipe is rotatably connected to the diverter frame. Each spray pipe has multiple connecting rods rotatably connected to one side. Each connecting rod end is rotatably connected to an air outlet pipe. Each air outlet end near the diverter frame is fixedly connected to a vent pipe. The end of the vent pipe away from the air outlet pipe is connected to the diverter frame. Each toothed ring has a connecting section rotatably connected to the middle. Each connecting section has a connecting chamber fixedly connected to the upper and lower parts. Each connecting section has an opening on one side of the middle part. Each opening is an isosceles trapezoid.

[0005] Preferably, a vertical frame is installed on the lower inner side of the precooling chamber, and a conveyor belt is provided on the upper inner side of the vertical frame. The outer surface of the conveyor belt is provided with uniformly distributed support bars, and the ends of the support bars are provided with uniformly distributed reserved openings.

[0006] Preferably, the bottom of the fixing frame is fixedly connected with a uniformly distributed limiting frame, and the middle of the straight bar is provided with a uniformly distributed limiting groove, and the straight bar is slidably connected to the limiting frame through the limiting groove.

[0007] Preferably, the upper connecting compartment is fixedly connected to a connecting pipe at the end near the diverter frame, and the connecting pipe is connected to the diverter frame at the end away from the connecting compartment. A fixing plate is provided on both sides of the connecting pipe, and the two ends of the fixing plate are fixedly connected to the connecting compartment and the diverter frame, respectively.

[0008] Preferably, the conveyor belt has evenly distributed openings running through its middle section, and these openings are all located between the frame bars. A water tank is provided on the upper inner side of the conveyor belt.

[0009] Preferably, the water tank is installed on the upper inner side of the support frame, and the top of the water tank has evenly distributed slots.

[0010] Preferably, a spray frame is installed at the upper part of the water tank, and a pump body is installed at the bottom of the water tank, with the pump body's output section connected to the spray frame.

[0011] Preferably, an air extraction chamber is installed at the front and rear ends and the middle of the water tank. A uniformly distributed return air pipe is installed at the end of the air extraction chamber that is far away from the air extraction chamber. The end of the return air pipe that is far away from the air extraction chamber penetrates the side wall of the precooling chamber. The end of the return air pipe that is far away from the air extraction chamber is connected to the diversion rack.

[0012] Preferably, the precooling chamber is provided with multiple return water pipes 1 at both the front and rear. The top of each return water pipe 1 is connected to the diversion frame. A pump chamber is installed in the middle of each return water pipe 1. Each return water pipe 1 has a branch return water pipe 2 at its input end. An accumulation chamber is provided on both the front and rear sides of the upright frame. The ends of the return water pipe 2 are located at the bottom of the accumulation chamber.

[0013] Preferably, a control panel is installed on one side of the front of the precooling chamber, and sealing doors are provided at both ends of the precooling chamber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This invention uses a spray pipe at the top of the precooling chamber to spray cooling water downwards, which quickly exchanges heat with the material surface to accelerate heat dissipation. At the same time, the sprayed water can fall into the lower water tank through the opening of the conveyor belt. The pump in the water tank draws the cooling water and pumps it into the spray frame. The spray frame sprays the cooling water upwards, which passes through the opening and contacts the bottom of the material to achieve heat exchange. Through the design of simultaneous spraying from top to bottom, the problem of uneven cooling in traditional devices is completely solved, and the material is cooled in all directions, which significantly improves the precooling effect.

[0016] 2. In the pre-cooling process of this invention, the pump chamber on one side can draw cooling water from the water chamber and the bottom accumulation chamber through return water pipe one and return water pipe two. The water is then introduced into the connecting pipe and the connecting chamber through the top diverter, and then enters the spray pipe through the opening of the connecting section, forming a closed-loop circulation of cooling water, reducing water waste. At the same time, the pump in the air extraction chamber can draw in the surrounding cold air, introduce it into the diverter through the air return pipe, and then transport it to the air vent pipe and spray it out from the bottom through the air outlet pipe. This not only assists in cooling the bottom of the material and accelerates heat dissipation, but also constrains the cooling water falling from the spray pipe, preventing it from being excessively dispersed and ensuring the stability of the cooling effect.

[0017] 3. This invention utilizes an electric push rod to drive a straight bar. The straight bar, through its two toothed sections, causes the meshing toothed ring to deflect, thereby adjusting the angle and range of the spray pipe. This allows for flexible adaptation to material size, avoiding overspraying or blind spots. During adjustment, the connecting rod can synchronously move the exhaust pipe, ensuring stable cooling operation. More importantly, when the toothed ring deflects, its inner connecting port and the opening of the connecting section will misalign, causing the amount of cooling water entering the spray pipe to change synchronously with the spray range. When the spray range expands, the water intake increases; when the range shrinks, the water intake decreases, achieving precise control of the cooling water and balancing cooling effect with energy-saving requirements.

[0018] 4. This invention uses support bars on the conveyor belt surface to suspend the material, creating space for bottom spray cooling. Simultaneously, the through-holes in the conveyor belt facilitate the return of cooling water to the water tank and provide a channel for cold air circulation. Under the action of the extraction chamber, cold air enters the water tank through the reserved openings in the support bars and the through-holes in the conveyor belt. During this process, the cold air carrying water vapor fully contacts the material, and the rapidly flowing airflow further accelerates heat loss from the material, effectively improving pre-cooling efficiency and shortening the pre-cooling cycle. Attached Figure Description

[0019] Figure 1 This is a frontal perspective three-dimensional structural diagram of a quick-freezing pre-cooling device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of a quick-freezing precooling device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the inner structure of the stand of a quick-freezing pre-cooling device according to the present invention;

[0022] Figure 4 This is a schematic diagram of a partial structure inside the water tank of a quick-freezing precooling device according to the present invention;

[0023] Figure 5 This is a partial structural diagram of the distribution frame of a quick-freezing precooling device according to the present invention;

[0024] Figure 6This is a partial structural diagram of the tooth section of a quick-freezing precooling device according to the present invention;

[0025] Figure 7 This is a partial structural diagram of the connecting compartment of a quick-freezing precooling device according to the present invention;

[0026] Figure 8 for Figure 2 Enlarged view of point A in the middle.

[0027] 101. Precooling chamber; 102. Control panel; 103. Sealing door; 104. Air return pipe; 105. Water return pipe one; 106. Conveyor belt; 107. Frame; 108. Water return pipe two; 109. Pump compartment; 110. Diverter frame; 111. Fixing frame; 112. Water tank; 113. Air extraction chamber; 114. Fixing plate; 115. Groove; 116. Spray frame; 117. Ventilation. 118. Pipe; 119. Sliding sleeve; 120. Spray pipe; 121. Connecting compartment; 122. Electric push rod; 123. Straight bar; 124. Toothed segment; 125. Connecting rod; 126. Air outlet pipe; 127. Limiting frame; 128. Limiting groove; 129. Opening; 130. Connecting section; 131. Toothed ring; 132. Connecting pipe; 133. Through port; 134. Frame bar; 135. Reserved opening. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-8 The quick-freezing precooling device shown includes a precooling chamber 101. Diverter racks 110 are installed on the top and front sides of the precooling chamber 101. A water tank 112 is provided on the upper inner side of the conveyor belt 106. The water tank 112 is installed on the upper inner side of the upright frame 107. The top of the water tank 112 has evenly distributed slots 115. A spray rack 116 is installed on the upper inner side of the water tank 112. A pump body is installed on the bottom inner side of the water tank 112. The output part of the pump body is connected to the spray rack 116. The end of the sliding sleeve 118 away from the spray pipe 119 is rotatably connected to the diverter rack 110.

[0030] Furthermore, in specific implementation, materials can be pre-frozen through the pre-cooling chamber 101. When quick-freezing is required, materials can be placed on the conveyor belt 106, which transports the materials into the pre-cooling chamber 101. Cooling water is sprayed downwards through the spray pipe 119 at the top of the pre-cooling chamber 101, achieving cooling and heat exchange of the materials and accelerating heat dissipation. The sprayed water falls into the lower water tank 112 through the opening 132 on the conveyor belt 106. The pump in the water tank 112 can draw cooling water from the water tank 112 and pump it into the spray frame 116. The spray frame 116 sprays the cooling water upwards, passing through the opening 132 to contact the bottom of the materials, achieving cooling and heat exchange of the bottom of the materials. The synchronous spraying from the top and bottom can achieve comprehensive spraying and cooling of the materials, which is beneficial to improving the pre-cooling effect.

[0031] The conveyor belt 106 has evenly distributed openings 132 running through its middle section. These openings 132 are all located between the support bars 133. The water tank 112 has extraction chambers 113 installed at its front and rear ends. At the ends of the extraction chambers 113 furthest from each other, evenly distributed return air pipes 104 are installed. The ends of the return air pipes 104 furthest from the extraction chambers 113 penetrate the side wall of the pre-cooling chamber 101. The ends of the return air pipes 104 furthest from the extraction chambers 113 are connected to the diversion frame 110. The pre-cooling chamber 101 has multiple return water pipes 105 at its front and rear. The tops of the return water pipes 105 are connected to the diversion frame 110. The frame 110 is connected. A pump chamber 109 is installed in the middle of the return water pipe 105. The input end of the return water pipe 105 is connected to the return water pipe 2 108. The front and rear sides of the upright frame 107 are equipped with accumulation chambers. The ends of the return water pipe 2 108 are all located at the bottom of the accumulation chamber. Multiple connecting rods 124 are rotatably connected to one side of the spray pipe 119. The ends of the connecting rods 124 are rotatably connected to the air outlet pipes 125. The end of the air outlet pipes 125 near the diversion frame 110 is fixedly connected to the air vent pipe 117. The end of the air vent pipe 117 away from the air outlet pipe 125 is connected to the diversion frame 110.

[0032] Furthermore, in specific implementation, during the precooling process, water from the water tank 112 and the bottom accumulation tank can be drawn through the pump chamber 109 on one side using the return water pipe 105 and the return water pipe 108. The drawn water will be guided through the top diverter 110 into the connecting pipe 131 and the connecting chamber 120, and then enter the spray pipe 119 through the opening 128 on the connecting section 129, realizing the circulation of cooling water. During spraying, the pump in the air extraction chamber 113 can draw in the surrounding cold air and pass it through the air extraction chamber 113. The cold air is introduced into the distribution frame 110 through the return air pipe 104. The distribution frame 110 can further introduce the cold air into the ventilation pipe 117. The ventilation pipe 117 can introduce the cold air into the exhaust pipe 125. The exhaust pipe 125 can spray the cold air from the bottom, which helps to cool the material at the bottom and accelerate the dissipation of heat. At the same time, the cold air sprayed from the bottom of the exhaust pipe 125 can restrain the cooling water sprayed by the spray pipe 119, preventing the cooling water from being too dispersed when falling, which would affect the cooling and pre-cooling effect.

[0033] The precooling chamber 101 has a fixed frame 111 installed at the top center. The bottom of the fixed frame 111 is fixedly connected to evenly distributed limiting frames 126. A straight bar 122 is provided on the lower side of the fixed frame 111. Multiple toothed segments 123 are provided on both sides of the straight bar 122. Evenly distributed limiting grooves 127 are opened in the middle of the straight bar 122. The straight bar 122 is slidably connected to the limiting frames 126 through the limiting grooves 127. An electric push rod 121 is installed at one end of the straight bar 122. The end of the electric push rod 121 away from the straight bar 122 is fixedly connected to the inner wall of the precooling chamber 101. Toothed rings 130 are meshed on both sides of the straight bar 122. A spray nozzle is fixedly connected to the middle of one side of each toothed ring 130. The spray pipe 119 is rotatably connected to a sliding sleeve 118 at the end away from the toothed ring 130. The toothed ring 130 is rotatably connected to a connecting section 129 in the middle. The connecting section 129 is fixedly connected to a connecting chamber 120 at both the upper and lower parts. The connecting section 129 has an opening 128 on one side in the middle. The opening 128 is set as an isosceles trapezoid. The upper connecting chamber 120 is fixedly connected to a connecting pipe 131 at the end near the diverter 110. The end of the connecting pipe 131 away from the connecting chamber 120 is connected to the diverter 110. The connecting pipe 131 is provided on both sides of the connecting pipe 131. The two ends of the fixing plate 114 are fixedly connected to the connecting chamber 120 and the diverter 110, respectively.

[0034] Furthermore, in specific implementation, the operation of the electric push rod 121 can drive the straight bar 122 to move. The toothed segment 123 on the straight bar 122 can drive the limiting frame 126 to deflect through the meshing toothed ring 130, thereby adjusting the spray range according to the size of the material and avoiding over-spraying or under-spraying. In actual use, the connecting rod 124 can drive the air outlet pipe 125 to move synchronously, so that the spray cooling operation can be kept stable. Furthermore, when adjusting the spray range of the spray pipe 119, when the gear ring 130 deflects, the connecting port on the inner side of the gear ring 130 will be misaligned with the opening 128, so that the amount of cooling water entering the spray pipe 119 through the opening 128 can be adjusted synchronously. When the spray pipe 119 expands and the spray range increases, the water inflow increases accordingly; when the spray pipe 119 contracts and the spray range decreases, the water inflow decreases accordingly. This achieves precise control of the cooling water, which is beneficial to actual cooling operations.

[0035] Among them, a control panel 102 is installed on one side of the front of the precooling chamber 101, and sealing doors 103 are provided at both ends of the precooling chamber 101. A vertical frame 107 is installed on the lower part of the inner side of the precooling chamber 101, and a conveyor belt 106 is provided on the upper part of the inner side of the vertical frame 107. The outer surface of the conveyor belt 106 is provided with evenly distributed support bars 133, and the ends of the support bars 133 are all provided with evenly distributed reserved openings 134.

[0036] Furthermore, in specific implementation, during pre-cooling, the support bars 133 on the conveyor belt 106 can lift the material, allowing the bottom of the material to be emptied, facilitating spray cooling of the bottom of the material. At the same time, the openings 132 on the conveyor belt 106 facilitate the return of cooling water and the circulation of cold air. Under the action of the extraction chamber 113, the cold air enters the water tank 112 through the reserved openings 134 and the openings 132. During this process, the cold air can carry water vapor to achieve full contact with the material on the conveyor belt 106. At the same time, the fast-flowing airflow can further accelerate the heat loss of the material, which is conducive to improving the heat dissipation speed of the material and improving the pre-cooling efficiency.

[0037] Working principle:

[0038] In practical use, materials can be pre-frozen in the pre-cooling chamber 101. When quick-freezing is required, materials can be placed on the conveyor belt 106, which transports the materials into the pre-cooling chamber 101. Cooling water is sprayed downwards through the spray pipe 119 at the top of the pre-cooling chamber 101, achieving cooling and heat exchange of the materials and accelerating heat dissipation. The sprayed water falls into the water tank 112 below through the opening 132 on the conveyor belt 106. The pump in the water tank 112 draws out the cooling water and pumps it into the spray frame 116, which sprays the cooling water upwards through the opening 116. The nozzle 132 contacts the bottom of the material, achieving cooling and heat exchange at the bottom. Simultaneous spraying from the top and bottom enables comprehensive cooling of the material, improving pre-cooling efficiency. During pre-cooling, water from the water tank 112 and bottom accumulation tank is drawn through the pump chamber 109 on one side using return water pipes 105 and 108. The drawn water passes through the top diverter 110 and is guided into the connecting pipe 131 and connecting chamber 120. Then, it enters the spray pipe 119 through the opening 128 on the connecting section 129, achieving cooling water circulation. During spraying, the pump in the extraction chamber 113 draws in surrounding cool air and guides it into the diverter 110 through the return air pipe 104. The diverter 110 further distributes the cool air... The cold air is introduced into the vent pipe 117, which then guides it into the exhaust pipe 125. The exhaust pipe 125 sprays the cold air from the bottom, effectively cooling the material at the bottom and accelerating heat dissipation. Simultaneously, the cold air sprayed from the bottom of the exhaust pipe 125 constrains the cooling water sprayed from the spray pipe 119, preventing excessive dispersion of the cooling water during its descent and ensuring effective pre-cooling. Furthermore, the operation of the electric push rod 121 moves the straight bar 122. The toothed segment 123 on the straight bar 122, through its meshing toothed ring 130, deflects the limiting frame 126, thereby adjusting the spray range according to the size of the material and preventing over-spraying or under-spraying. In actual use… During operation, the connecting rod 124 drives the exhaust pipe 125 to move synchronously, ensuring stable spray cooling. Furthermore, when adjusting the spray range of the spray pipe 119, the toothed ring 130 deflects, causing the inner connecting port of the toothed ring 130 to misalign with the opening 128. This allows for synchronized adjustment of the amount of cooling water entering the spray pipe 119 through the opening 128. When the spray pipe 119 expands and the spray range increases, the water inflow increases accordingly; when the spray pipe 119 contracts and the spray range decreases, the water inflow decreases accordingly. This precise control of the cooling water is beneficial for actual cooling operations. During pre-cooling, the support bars 133 on the conveyor belt 106 can elevate the material, allowing the bottom of the material to suspend in the air.This design facilitates spray cooling of the bottom of the material, while the opening 132 on the conveyor belt 106 allows for convenient return of cooling water and efficient air circulation. The cold air, aided by the extraction chamber 113, enters the water tank 112 through the reserved opening 134 and the opening 132. During this process, the cold air carries water vapor, ensuring thorough contact with the material on the conveyor belt 106. The rapid airflow further accelerates heat loss from the material, improving heat dissipation speed and pre-cooling efficiency.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A quick-freezing pre-cooling device, comprising a pre-cooling chamber (101), characterized in that: Diverter racks (110) are installed on the front and rear sides of the top of the precooling chamber (101). A fixing frame (111) is installed in the middle of the top of the precooling chamber (101). A straight bar (122) is provided on the lower side of the fixing frame (111). Multiple toothed segments (123) are provided on both sides of the straight bar (122). An electric push rod (121) is installed on one end of the straight bar (122). The end of the electric push rod (121) away from the straight bar (122) is connected to the inner wall of the precooling chamber (101). The straight bar (122) is fixedly connected to toothed rings (130) on both sides. A spray pipe (119) is fixedly connected to the middle of one side of each toothed ring (130). A sliding sleeve (118) is rotatably connected to the end of each spray pipe (119) away from the toothed ring (130). The end of each sliding sleeve (118) away from the spray pipe (119) is rotatably connected to a diverter frame (110). Multiple connecting rods (124) are rotatably connected to one side of each spray pipe (119). (124) Each end is rotatably connected to an air outlet pipe (125). The end of each air outlet pipe (125) near the flow divider (110) is fixedly connected to a vent pipe (117). The end of each vent pipe (117) away from the air outlet pipe (125) is connected to the flow divider (110). Each toothed ring (130) is rotatably connected to a connecting section (129). Each connecting section (129) is fixedly connected to a connecting chamber (120) at both the upper and lower parts. Each connecting section (129) is open on one side of the middle part. An opening (128) is provided, and the opening (128) is set as an isosceles trapezoid. The upper part of the connecting chamber (120) is fixedly connected to the end of the diverter (110) with a connecting pipe (131). The end of the connecting pipe (131) away from the connecting chamber (120) is connected to the diverter (110). Fixing plates (114) are provided on both sides of the connecting pipe (131). The two ends of the fixing plates (114) are fixedly connected to the connecting chamber (120) and the diverter (110) respectively.

2. The quick-freezing pre-cooling device according to claim 1, characterized in that: The lower inner side of the precooling chamber (101) is equipped with a stand (107), and the upper inner side of the stand (107) is equipped with a conveyor belt (106). The outer surface of the conveyor belt (106) is provided with uniformly distributed support bars (133), and the ends of the support bars (133) are provided with uniformly distributed reserved openings (134).

3. The quick-freezing pre-cooling device according to claim 1, characterized in that: The bottom of the fixed frame (111) is fixedly connected with a uniformly distributed limiting frame (126), and the middle of the straight bar (122) is provided with a uniformly distributed limiting groove (127). The straight bar (122) is slidably connected to the limiting frame (126) through the limiting groove (127).

4. The quick-freezing pre-cooling device according to claim 2, characterized in that: The conveyor belt (106) has evenly distributed openings (132) running through its middle section. The openings (132) are all located between the support bars (133). A water tank (112) is provided on the upper inner side of the conveyor belt (106).

5. The quick-freezing pre-cooling device according to claim 4, characterized in that: The water tank (112) is installed on the upper inner side of the support frame (107), and the top of the water tank (112) is provided with evenly distributed slots (115).

6. The quick-freezing pre-cooling device according to claim 4, characterized in that: A spray frame (116) is installed in the upper part of the water tank (112), and a pump body is installed in the bottom of the water tank (112). The output part of the pump body is connected to the spray frame (116).

7. The quick-freezing pre-cooling device according to claim 4, characterized in that: The water tank (112) is equipped with an air extraction chamber (113) at the front and rear ends and the middle. The air extraction chamber (113) is equipped with a uniformly distributed return air pipe (104) at the far end. The return air pipe (104) at the far end from the air extraction chamber (113) penetrates the side wall of the precooling chamber (101). The return air pipe (104) at the far end from the air extraction chamber (113) is connected to the diversion rack (110).

8. The quick-freezing precooling device according to claim 7, characterized in that: The precooling chamber (101) is equipped with multiple return water pipes (105) at both the front and rear. The top of each return water pipe (105) is connected to the diversion frame (110). A pump chamber (109) is installed in the middle of each return water pipe (105). Each return water pipe (105) has a return water pipe (108) connected to its input end. An accumulation chamber is provided on both the front and rear sides of the upright frame (107). The ends of each return water pipe (108) are located at the bottom of the accumulation chamber.

9. The quick-freezing pre-cooling device according to claim 1, characterized in that: A control panel (102) is installed on one side of the front of the precooling chamber (101), and sealing doors (103) are provided at both ends of the precooling chamber (101).

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