Refrigerator car compartment with hard polyurethane sandwich panels

Abstract

The application discloses a refrigeration truck compartment embedded with rigid polyurethane heat insulation plates and belongs to the technical field of refrigeration truck compartments. The deicing assembly is synchronously translated with the sliding frame as a whole, and the knocking roller is attached to the surface of the bottom plate in the normal state. The multiple groups of convex strips distributed on the outer wall can directly crush the shallow thin ice on the surface of the bottom plate. At the same time, the spiral guide strips periodically extrude the sliding columns during rotation, and push the sliding cylinder to do vertical lifting motion along the inner wall of the fixed cylinder. When the sliding cylinder drives the sliding column to separate from the spiral guide strips, the knocking roller will quickly move downward and knock the bottom plate under the condition that the elastic force of the first spring and the second spring is released. The elastic support action of the extension rod and the first spring is matched, the knocking roller forms a composite deicing mode of rolling crushing and high-frequency reciprocating knocking, which can not only efficiently break the thin ice on the surface of the bottom plate, but also break the hardened thick ice and stubborn accumulated ice. Moreover, the knocking roller can adapt to the slight height difference on the surface of the bottom plate, and ensure that there is no dead angle in ice breaking.

Description

Technical Field

[0001] This invention relates to the field of refrigerated truck compartment technology, specifically to a refrigerated truck compartment with embedded rigid polyurethane insulation panels. Background Technology

[0002] The insulation structure of refrigerated truck compartments mainly adopts three processes: sectional injection foaming, bonding, or wet molding. The insulation material is mostly polyurethane insulation layer. Rigid polyurethane insulation boards, due to their low thermal conductivity, moisture and corrosion resistance, high strength, and prefabrication capabilities, are gradually becoming the mainstream insulation material in the industry. Refrigerated truck compartments are in a low-temperature, sealed environment for extended periods, making the vertical surfaces and roof prone to frost buildup, while the floor easily accumulates ice fragments and thick ice layers—a common problem in cold chain transportation equipment. While existing refrigerated truck compartments with embedded rigid polyurethane insulation boards offer excellent insulation performance, under low-temperature conditions, moisture in the air inside the compartment will continuously condense into frost on the side walls, roof, and other vertical surfaces. Temperature fluctuations during vehicle start-up, stopping, loading, and unloading, combined with dripping moisture from goods and the intrusion of outside air, continuously accumulate ice and ice slag on the floor, especially at corners and recesses where ice buildup is more severe.

[0003] Currently, defrosting and de-icing operations mainly rely on handheld scrapers, brushes, and squeegees, which limit the working space and make operation difficult. Existing auxiliary cleaning equipment mostly uses simple brushes and single squeegees to achieve simple sweeping and wiping, which can only achieve local sweeping and water spraying to melt ice. There are blind spots in cleaning corners, gaps, and other dead corners. There is a lack of integrated mechanical structures that can simultaneously adapt to defrosting of the facade and top and specialized de-icing of the bottom, making it difficult to balance cleaning effect, body protection, and work efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a refrigerated truck compartment with an embedded rigid polyurethane insulation board, in order to solve the problems mentioned in the background art. Existing auxiliary cleaning equipment can only achieve partial sweeping and water spraying to melt ice inside the compartment, leaving blind spots in corners, gaps and other dead corners. It also lacks an integrated mechanical structure that can simultaneously adapt to defrosting of the facade and top and special de-icing of the bottom, making it difficult to balance cleaning effect, compartment protection and work efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A refrigerated truck compartment with embedded rigid polyurethane insulation board includes a compartment body. A double door is installed at an opening on one side of the compartment body, and a rigid polyurethane insulation layer is embedded in the middle of the compartment body. A refrigeration and insulation mechanism is installed through the compartment body on the side away from the double door. A corrugated steel plate is installed on the exterior of the compartment body, and a bottom plate is installed on the bottom of the inner wall of the compartment body. Several strip-shaped holes are formed in the bottom plate. A collection assembly is fixedly installed on the bottom of the compartment body corresponding to the bottom plate. A drive assembly is fixedly installed on the top of the inner wall of the compartment body. One end of the drive assembly penetrates the compartment body and is fixed to one side of the compartment body. A sliding frame is fixedly connected to the drive assembly, and the sliding frame slides. The sliding frame is fitted to the inner wall of the compartment and has clearance holes. The refrigeration and insulation mechanism is installed through the clearance holes. A de-icing component is installed at the bottom of the sliding frame and its bottom is fitted to the base plate. A transmission component is fixedly connected to the de-icing component and is fixedly installed through the bottom of the sliding frame. A residue pushing component is installed on one side of the top of the transmission component. Both ends of the residue pushing component pass through the sliding frame and are engaged with racks. The racks are fixed to the side wall of the compartment. A limit hole is opened at the bottom of the sliding frame, and the residue pushing component slides through the limit hole and its bottom is fitted to the base plate.

[0007] As a further embodiment of the present invention, the collection assembly includes a bracket fixed to the bottom of the carriage. Two sludge collection boxes are slidably installed inside the bracket. The sludge collection boxes are located below the bottom plate. A handle is fixed to one side of each sludge collection box, and locking screws are installed at both ends of each sludge collection box. The sludge collection boxes are fixed to the outside of the bracket by the locking screws.

[0008] As a further embodiment of the present invention, the drive assembly includes a support box, which is fixed to the top of the inner wall of the compartment. A lead screw is rotatably connected inside the support box via a bushing. One end of the lead screw passes through the support box and the compartment and is fixed to a motor. The motor is installed on the outside of the compartment. A nut is threaded onto the outside of the lead screw. Sliding holes are respectively opened on the front and rear sides of the support box. The nut passes through the two sliding holes and is fixed to the top opening of the sliding frame. Two ear plates are fixed to the end of the support box away from the motor. Guide rods are fixed between the ear plates and the inner wall of the compartment. The two guide rods slide through the sliding frame. A telescopic dustproof cover section is installed between the nut and the inner wall of the sliding hole.

[0009] As a further embodiment of the present invention, a protective cover is fixed to one side of the bottom of the sliding frame, the top of the protective cover is inclined, the top of the transmission component and the residue pushing component are located inside the protective cover, and guide seats are fixed to the front and rear sides of the bottom of the sliding frame respectively. The guide seats are attached to the side wall of the compartment, and the top of the guide seats is inclined downward. Slide grooves are provided on the front and rear sides of the sliding frame and above the guide seats. The rack is inserted through the slide grooves, and the sliding frame is slidably connected to the rack through the slide grooves.

[0010] As a further embodiment of the present invention, the de-icing assembly includes two brackets, one end of which is fixed to the bottom of the transmission assembly, and a striking roller is installed between the two brackets. The striking roller has several protrusions on its exterior and is attached to the base plate. A telescopic rod and a first spring are fixed between the bracket and the bottom of the sliding frame, and the first spring is sleeved on the outside of the telescopic rod.

[0011] As a further embodiment of the present invention, the transmission assembly includes a fixed cylinder, which is fixedly inserted through the bottom of the sliding frame. A sliding cylinder is slidably connected inside the fixed cylinder. L-shaped rods are fixed on both sides of the sliding cylinder, and sliding holes are respectively opened on the fixed cylinder corresponding to the positions of the two L-shaped rods. The L-shaped rods slide through the sliding holes, and the bottom ends of the L-shaped rods are fixed to the bracket. A connecting shaft is rotatably connected through the fixed cylinder via a bushing. A rotating roller is fixed outside the connecting shaft. Two spiral guide strips are fixed outside the rotating roller. The spiral directions of the two spiral guide strips are opposite, and a sliding column is slidably connected to the lowest point of the spiral guide strips. The sliding column is fixed to the inner wall of the sliding cylinder. A second spring is fixed between the top of the sliding cylinder and the inner wall of the fixed cylinder.

[0012] As a further embodiment of the present invention, the top end of the connecting shaft passes through the fixed cylinder and is fixed with a secondary bevel gear. A main bevel gear is meshed with the secondary bevel gear. A bearing seat is rotatably sleeved on one end of the main bevel gear. The bearing seat is fixed in the sliding frame. A transmission gear is fixed to one end of the main bevel gear and the outside of the residue pushing assembly, and the two transmission gears mesh with each other.

[0013] As a further embodiment of the present invention, the residue pushing assembly includes a rotating shaft, which rotates through a bushing in a sliding frame. Drive gears are fixed at both ends of the rotating shaft, and the drive gears mesh with a rack. One transmission gear is fixed outside the rotating shaft, and the rotating shaft and the main bevel gear are connected by two transmission gears. A central roller is fixed in the middle of the rotating shaft, and a wavy groove is formed around the outside of the central roller. A reciprocating cylinder is provided outside the central roller, and both ends of the reciprocating cylinder are sleeved with the rotating shaft. Several sliding balls are fixed to the inner wall of the reciprocating cylinder, and the sliding balls are slidably connected within the wavy groove. A sliding block is fixedly connected to the bottom of the reciprocating cylinder, and the sliding block slides through a limiting hole. A connecting plate is fixed to the bottom of the sliding block, and a slag-pushing comb is installed at the bottom of the connecting plate. The slag-pushing comb fits against the bottom plate and is located on one side of the striking roller.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes a de-icing assembly that moves synchronously with the sliding frame. The striking roller, normally in contact with the bottom plate surface, has multiple sets of protruding strips on its outer wall that directly crush the shallow layer of thin ice on the bottom plate surface. Simultaneously, the sliding frame's movement synchronously displaces the entire residue-pushing assembly, causing the drive gears at both ends of the rotating shaft to mesh along the racks on the side wall of the chamber. This meshing relationship between the racks and drive gears drives the rotating shaft and its externally fixed transmission gears to rotate synchronously. The rotating shaft, through two sets of meshing transmission gears—a main bevel gear and a secondary bevel gear—transmits power in the opposite direction to the transmission assembly. The connecting shaft, driven by the secondary bevel gear, drives the rotating roller to rotate synchronously. Two sets of spiral guide strips with opposite spiral directions are installed on the outside of the roller. During rotation, the spiral guide strips periodically compress the sliding column, pushing the sliding cylinder to move vertically up and down along the inner wall of the fixed cylinder. The sliding cylinder is linked to the bottom via L-shaped rods on both sides. The bracket drives the bracket and the striking roller to complete the lifting and lowering action synchronously. When the slide cylinder moves up, it will squeeze the second spring. The bracket will also push the telescopic rod and compress the first spring. When the slide column is separated from the spiral guide bar, the striking roller will quickly move down and strike the bottom plate through the release of elastic force by the first and second springs. With the elastic support of the telescopic rod and the first spring, the striking roller forms a compound de-icing mode of rolling and high-frequency reciprocating striking. It can efficiently break the thin ice on the surface of the bottom plate, as well as break the hardened thick ice and stubborn ice accumulation. Moreover, the second spring, together with the support of the first spring, makes the striking roller adapt to the slight height difference of the bottom plate surface, ensuring that there are no dead angles in ice breaking. 2. When the sliding frame moves, the drive gears at both ends of the rotating shaft mesh with the racks fixed to the side wall of the housing, assisting in the stable rotation of the rotating shaft. The rotating shaft drives the central roller in the middle to rotate synchronously. Relying on the sliding engagement between the annular wave groove outside the central roller and the sliding ball inside the reciprocating cylinder, the circumferential rotation of the rotating shaft is converted into the transverse linear reciprocating motion of the reciprocating cylinder. The reciprocating cylinder drives the slide block to slide left and right along the limiting hole at the bottom of the sliding frame, and finally drives the bottom connecting plate and the slag pusher to sweep the bottom plate surface back and forth. The ice chips, frost, and residual condensation after being broken by the hammering roller are pushed to the slotted hole in the bottom plate. The ice chips can be collected and cleaned immediately after being broken by the hammering roller, avoiding the refreezing of fine ice chips and residual ice water in the bottom plate gaps, reducing repeated de-icing operations. Moreover, the slag pusher relies on the cross-shaped composite sweeping method of left and right movement and back and forth reciprocating, which can fully cover the bottom plate plane, corners and dead corners around the slotted hole compared to single unidirectional sweeping, effectively removing fine ice chips, frost and cargo residue. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a side view structural schematic diagram of the body of the present invention;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the compartment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the components used in this invention;

[0020] Figure 5 This is a schematic diagram of the structure of the driving component of the present invention;

[0021] Figure 6 This is a schematic diagram of the sliding frame and protective cover of the present invention;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the protective cover of the present invention;

[0023] Figure 8 This is a schematic diagram of the cross-sectional structure of the sliding frame of the present invention;

[0024] Figure 9 This is a schematic diagram of the transmission component of the present invention;

[0025] Figure 10 This is a schematic diagram of the cross-sectional structure of the reciprocating cylinder of the present invention;

[0026] Figure 11 This is a schematic diagram of the cross-sectional structure of the fixed cylinder of the present invention;

[0027] Figure 12 This is a schematic diagram of the structure of the rotating roller and the spiral guide bar of the present invention;

[0028] Figure 13 This is a side view of the support and striking roller of the present invention.

[0029] The attached diagram lists the components represented by each number as follows: 1. Body; 2. Double doors; 3. Corrugated steel plate; 4. Rigid polyurethane insulation layer; 5. Refrigeration and insulation mechanism; 6. Collection assembly; 601. Bracket; 602. Sludge collection box; 603. Handle; 604. Locking screw; 7. Bottom plate; 8. Strip hole; 9. Drive assembly; 901. Support box; 902. Lead screw; 903. Nut; 904. Sliding hole; 905. Telescopic dustproof cover section; 906. Motor; 907. Ear plate; 908. Guide rod; 10. Sliding frame; 11. Clearance hole; 12. De-icing assembly; 121. Bracket; 122. Striking roller; 123. Telescopic rod; 124. First spring; 13. Transmission assembly; 13 1. Fixed cylinder; 132. Sliding cylinder; 133. L-shaped rod; 134. Sliding hole; 135. Connecting shaft; 136. Rotating roller; 137. Spiral guide bar; 138. Sliding column; 139. Second spring; 1301. Secondary bevel gear; 1302. Main bevel gear; 1303. Bearing seat; 1304. Transmission gear; 14. Residue pushing assembly; 141. Rotating shaft; 142. Drive gear; 143. Reciprocating cylinder; 144. Sliding ball; 145. Center roller; 146. Wave groove; 147. Sliding seat; 148. Connecting plate; 149. Slag pushing comb teeth; 15. Limiting hole; 16. Rack; 17. Sliding groove; 18. Protective cover; 19. Guide seat. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-13 The present invention provides a technical solution:

[0032] A refrigerated truck compartment with embedded rigid polyurethane insulation panels includes a compartment body 1. A double door 2 is installed at an opening on one side of the compartment body 1, and a rigid polyurethane insulation layer 4 is embedded in the middle of the compartment body 1. A refrigeration and insulation mechanism 5 is installed through the compartment body 1 on the side away from the double door 2. A corrugated steel plate 3 is installed on the exterior of the compartment body 1. The embedded rigid polyurethane insulation layer 4 effectively blocks the exchange of hot and cold air between the inside and outside of the compartment body 1, inhibits the intrusion of external high-temperature heat into the compartment, and reduces the energy consumption of the refrigeration unit; ensuring a long-term stable low-temperature storage and transportation environment for the compartment. The corrugated steel plate 3 on the outer wall of the compartment body 1, compared to ordinary flat steel plates, can disperse external impact stress, and has stronger resistance to bending, impact, and scratches. It can effectively resist the impact of gravel during transportation and the lateral squeezing of goods during loading and unloading, protecting the inner insulation layer from being squeezed and damaged. At the same time, it improves the overall structural rigidity and load-bearing capacity of the compartment body 1, extending the service life of the compartment body 1.

[0033] A bottom plate 7 is installed on the bottom of the inner wall of the compartment 1. Several strip holes 8 are opened in the bottom plate 7. A collection component 6 is fixedly installed at the bottom of the compartment 1 corresponding to the bottom plate 7. The collection component 6 includes a bracket 601. The bracket 601 is fixed to the bottom of the compartment. Two sludge collection boxes 602 are slidably installed inside the bracket 601. The sludge collection boxes 602 are located below the bottom plate 7. A handle 603 is fixed on one side of the sludge collection box 602. Locking screws 604 are installed at both ends of the sludge collection box 602. The sludge collection box 602 is fixed to the outside of the bracket 601 by the locking screws 604.

[0034] During operation, the sludge collection box 602 is locked and fixed to the bracket 601 by the locking screws 604 at both ends to prevent the sludge collection box 602 from shifting during vehicle movement and cleaning operations, and to prevent sewage leakage and ice slag spillage. After the cleaning operation is completed, the staff only needs to loosen the locking screws 604, hold the handle 603 to pull the sludge collection box 602 out of the bracket 601, empty the dirt inside and clean it, and then reset and lock the sludge collection box 602.

[0035] As a further embodiment of the present invention, a drive assembly 9 is fixed to the top of the inner wall of the compartment 1. One end of the drive assembly 9 passes through the compartment 1 and is fixed to one side of the compartment 1. A sliding frame 10 is fixedly connected in the drive assembly 9. The sliding frame 10 slides against the inner wall of the compartment 1, and an avoidance hole 11 is provided in the sliding frame 10. The refrigeration and heat preservation mechanism 5 is disposed through the avoidance hole 11. The avoidance hole 11 is provided inside the sliding frame 10, and the refrigeration and heat preservation mechanism 5 is disposed through the avoidance hole 11. During the reciprocating movement of the sliding frame 10, there will be no structural interference with the refrigeration and heat preservation mechanism 5, ensuring that refrigeration and cleaning operations are carried out simultaneously.

[0036] The drive assembly 9 includes a support box 901, which is fixed to the top of the inner wall of the compartment 1. A lead screw 902 is rotatably connected inside the support box 901 via a bushing. One end of the lead screw 902 passes through the support box 901 and the compartment 1 and is fixed to a motor 906. The motor 906 is installed on the outside of the compartment. A nut 903 is threaded onto the outside of the lead screw 902. Sliding holes 904 are opened on the front and rear sides of the support box 901, respectively. The nut 903 passes through the two sliding holes 904 and is fixed to the top opening of the sliding frame 10. Two ear plates 907 are fixed to the end of the support box 901 away from the motor 906. A guide rod 908 is fixed between the ear plate 907 and the inner wall of the compartment 1. The two guide rods 908 slide through the sliding frame 10. A telescopic dustproof cover section 905 is installed between the nut 903 and the inner wall of the sliding hole 904.

[0037] During operation, the sliding frame 10 is simultaneously sleeved on the outside of the two guide rods 908. The guide rods 908 can limit and guide the sliding frame 10, effectively avoiding the problems of displacement and jamming during the operation of the sliding frame 10, and improving the stability of equipment operation.

[0038] The telescopic dustproof cover section 905 set between the nut 903 and the sliding hole 904 can isolate impurities such as frost, dust, and ice slag inside the chamber, prevent impurities from entering the support box 901 and causing jamming and wear of the transmission structure of the lead screw 902 and nut 903, and extend the service life of the drive component 9.

[0039] As a further embodiment of the present invention, a protective cover 18 is fixed to one side of the bottom of the sliding frame 10. The top of the protective cover 18 is designed to be inclined. A de-icing component 12 is installed at the bottom of the sliding frame 10, and the bottom of the de-icing component 12 is attached to the base plate 7. A transmission component 13 is fixedly connected to the de-icing component 12. The transmission component 13 is fixedly inserted through the bottom of the sliding frame 10. A residue pushing component 14 is installed on one side of the top of the transmission component 13. Both ends of the residue pushing component 14 penetrate the sliding frame 10 and are engaged with a rack 16. The rack 16 is fixed to the side wall of the compartment 1. A limiting hole 15 is opened at the bottom of the sliding frame 10. The residue pushing component 14 slides through the limiting hole 15, and the bottom of the residue pushing component 14 is attached to the base plate 7. The tops of the transmission component 13 and the residue pushing component 14 are located inside the protective cover 18, and the protective cover 18 can provide closed protection for the internal transmission component 13 and residue pushing component 14.

[0040] The front and rear sides of the bottom of the sliding frame 10 are respectively fixed with guide seats 19. The guide seats 19 are attached to the side wall of the body 1, and the top of the guide seats 19 is designed to be inclined downward. The front and rear sides of the sliding frame 10 and the position above the guide seats 19 are provided with slide grooves 17. The rack 16 is installed through the slide groove 17. The sliding frame 10 is slidably connected to the rack 16 through the slide groove 17.

[0041] During operation, as the sliding frame 10 reciprocates against the inner wall of the compartment 1, its sides directly contact the inner side wall and top inner wall of the compartment 1, directly scraping away frost and thin frost adhering to the vertical surface and top inner wall, achieving automatic defrosting throughout the compartment. The detached frost and condensation fall onto the surface of the floor plate 7 under gravity. The bottom of the sliding frame 10 is equipped with an inclined protective cover 18 and a guide seat 19 to prevent ice and frost impurities from corroding the transmission structure; the inclined guide seat 19 can guide the falling frost and ice water, preventing debris from accumulating in the moving gaps of the sliding frame 10.

[0042] As a further embodiment of the present invention, the de-icing assembly 12 includes two supports 121. One end of each support 121 is fixed to the bottom of the transmission assembly 13. A striking roller 122 is installed between the two supports 121. The two supports 121 are designed in an inverted L shape and are symmetrically arranged about the middle of the transmission assembly 13. The two ends of the striking roller 122 pass through and rotate in the side walls of the two supports 121. The striking roller 122 has several protrusions on its outside and is attached to the bottom plate 7. A telescopic rod 123 and a first spring 124 are fixed between the support 121 and the bottom of the sliding frame 10. The first spring 124 is sleeved on the outside of the telescopic rod 123. The de-icing assembly 12 moves synchronously with the sliding frame 10. The striking roller 122 is normally attached to the surface of the bottom plate 7, and the multiple sets of protrusions distributed on its outer wall can directly crush the shallow layer of thin ice on the surface of the bottom plate 7.

[0043] The transmission assembly 13 includes a fixed cylinder 131, which is fixedly inserted through the bottom of the sliding frame 10. A sliding cylinder 132 is slidably connected inside the fixed cylinder 131. L-shaped rods 133 are fixed on both sides of the sliding cylinder 132, and sliding holes 134 are opened in the fixed cylinder 131 corresponding to the positions of the two L-shaped rods 133. The L-shaped rods 133 slide through the sliding holes 134, and the bottom end of the L-shaped rods 133 is fixed to the bracket 121. A connecting shaft 135 is rotatably connected through the fixed cylinder 131 via a bushing. A rotating roller 136 is fixed to the outside of the connecting shaft 135. Two spiral guide strips 137 are fixed to the outside of the rotating roller 136. The spiral directions of the two spiral guide strips 137 are opposite, and a sliding column 138 is slidably overlapped at the lowest point of the spiral guide strips 137. The sliding column 138 is fixed to the inner wall of the sliding cylinder 132. A second spring 139 is fixed between the top of the sliding cylinder 132 and the inner wall of the fixed cylinder 131.

[0044] During operation, two sets of spiral guide bars 137 with opposite spiral directions are set on the outside of the rotating roller 136. During the rotation, the spiral guide bars 137 periodically squeeze the sliding column 138, pushing the sliding cylinder 132 to move vertically up and down along the inner wall of the fixed cylinder 131. The sliding cylinder 132 is linked to the bottom support 121 through the L-shaped rods 133 on both sides, driving the support 121 and the striking roller 122 to complete the lifting and lowering action synchronously. When the sliding cylinder 132 moves up, it will squeeze the second spring 139. The support 121 will also push the telescopic rod 123 and compress the first spring 124. When the sliding column 138 leaves the highest point of the spiral guide bar 137, the striking roller 122 will quickly move down and strike the bottom plate 7 under the elastic force released by the first spring 124 and the second spring 139. This can not only efficiently break the thin ice on the surface of the bottom plate 7, but also break the hardened thick ice and stubborn ice accumulation.

[0045] As a further embodiment of the present invention, the top end of the connecting shaft 135 passes through the fixed cylinder 131 and is fixed with a secondary bevel gear 1301. A main bevel gear 1302 is meshed on the secondary bevel gear 1301. A bearing seat 1303 is rotatably sleeved on one end of the main bevel gear 1302. The bearing seat 1303 is fixed in the sliding frame 10. A transmission gear 1304 is fixed on one end of the main bevel gear 1302 and on the outside of the residue pushing assembly 14, respectively. The two transmission gears 1304 mesh with each other.

[0046] The residue pushing assembly 14 includes a rotating shaft 141, which rotates through a bushing in the sliding frame 10. Drive gears 142 are fixed at both ends of the rotating shaft 141, and the drive gears 142 mesh with the rack 16. One of the transmission gears 1304 is fixed outside the rotating shaft 141, and the rotating shaft 141 and the main bevel gear 1302 are connected by transmission through the two transmission gears 1304.

[0047] During operation, the sliding frame 10 moves synchronously, causing the residue pushing component 14 to shift as a whole. This causes the drive gears 142 at both ends of the rotating shaft 141 to mesh along the rack 16 on the side wall of the compartment 1. By utilizing the meshing relationship between the rack 16 and the drive gear 142, the linear travel power of the sliding frame 10 is converted into the rotational power of the drive gear 142, which in turn drives the rotating shaft 141 and the transmission gear 1304 fixed on its outer side to rotate synchronously. The rotating shaft 141 transmits power in the opposite direction to the transmission component 13 through two sets of meshing transmission gears 1304, main bevel gear 1302 and secondary bevel gear 1301. This allows the transmission component 13 to provide power to the de-icing component 12, enabling the de-icing component 12 to clean the bottom plate 7 while the sliding frame 10 moves and scrapes.

[0048] A central roller 145 is fixed in the middle of the rotating shaft 141. A wave groove 146 is opened around the outside of the central roller 145. A reciprocating cylinder 143 is provided outside the central roller 145. The two ends of the reciprocating cylinder 143 are sleeved with the rotating shaft 141 through sliding sleeves. Several sliding balls 144 are fixed on the inner wall of the reciprocating cylinder 143. The sliding balls 144 are slidably connected in the wave groove 146. A sliding seat 147 is fixedly connected to the bottom of the reciprocating cylinder 143. The sliding seat 147 slides through the limiting hole 15. A connecting plate 148 is fixed to the bottom of the sliding seat 147. A slag pushing comb tooth 149 is installed at the bottom of the connecting plate 148. The slag pushing comb tooth 149 is in contact with the bottom plate 7 and is located on one side of the striking roller 122.

[0049] During operation, the rotating shaft 141 drives the central roller 145 to rotate synchronously. Relying on the sliding engagement between the annular wave groove 146 on the outside of the central roller 145 and the sliding ball 144 inside the reciprocating cylinder 143, the circumferential rotation of the rotating shaft 141 is converted into the transverse linear reciprocating motion of the reciprocating cylinder 143. The reciprocating cylinder 143 drives the slide block 147 to slide left and right along the limiting hole 15 at the bottom of the sliding frame 10, and finally drives the bottom connecting plate 148 and the slag pusher comb 149 to reciprocate and clean the surface of the bottom plate 7. The ice slag, frost debris, and residual condensate after being broken by the striking roller 122 are uniformly pushed to the position of the strip hole 8 opened in the bottom plate 7. It can complete the collection and cleaning immediately after the ice slag is broken by the striking roller 122, avoiding the refreezing of fine ice slag and residual ice water in the gaps of the bottom plate 7, and reducing repeated de-icing operations.

[0050] Working principle of this invention:

[0051] During defrosting and de-icing operations, the motor 906 installed on the outside of the compartment 1 is started. The output end of the motor 906 drives the lead screw 902 to rotate inside the support box 901. The lead screw 902 and the nut 903 with external threaded connection form the lead screw 902-nut 903 transmission structure, which can convert the rotational motion of the lead screw 902 into the linear reciprocating motion of the nut 903. The nut 903 passes through the sliding holes 904 on both sides of the support box 901 and is fixedly connected to the sliding frame 10, thereby driving the sliding frame 10 to move horizontally reciprocally along the inner wall of the compartment 1. The sliding frame 10 is also sleeved on the outside of two guide rods 908. The guide rods 908 can limit and guide the sliding frame 10, effectively avoiding the problem of deviation and jamming during the operation of the sliding frame 10, and improving the stability of equipment operation. Meanwhile, the telescopic dustproof cover section 905 set between the nut 903 and the sliding hole 904 can isolate impurities such as frost, dust, and ice slag inside the compartment, preventing impurities from entering the support box 901 and causing jamming or wear of the transmission structure of the lead screw 902 and nut 903, thus extending the service life of the drive component 9. An avoidance hole 11 is opened inside the sliding frame 10, through which the refrigeration and insulation mechanism 5 passes. During the reciprocating movement of the sliding frame 10, there will be no structural interference with the refrigeration and insulation mechanism 5, ensuring that refrigeration and cleaning operations are carried out simultaneously.

[0052] During the reciprocating translation of the sliding frame 10 against the inner wall of the compartment 1, the side of the frame directly adheres to the inner side wall and the top inner wall of the compartment 1, which can directly scrape off the frost and thin frost adhering to the vertical surface and the top inner wall, realizing automatic defrosting of the entire compartment; the frost and condensate fall to the surface of the bottom plate 7 under the action of gravity. The bottom of the sliding frame 10 is equipped with a protective cover 18 and a guide seat 19 with an inclined structure. The protective cover 18 can seal and protect the internal transmission components 13 and the residue pushing components 14 to prevent ice and frost impurities from corroding the transmission structure; the inclined guide seat 19 can guide the falling frost and ice water to prevent debris from accumulating in the moving gaps of the sliding frame 10, further ensuring the smooth operation of the mechanism;

[0053] During the cleaning operation, the de-icing assembly 12 moves synchronously with the sliding frame 10, and the striking roller 122 is normally in contact with the surface of the bottom plate 7. The multiple sets of convex strips distributed on its outer wall can directly crush the shallow layer of thin ice on the surface of the bottom plate 7. At the same time, the sliding frame 10 moves synchronously, driving the residue pushing assembly 14 to move, so that the drive gears 142 at both ends of the rotating shaft 141 move and mesh along the rack 16 on the side wall of the compartment 1. By utilizing the meshing relationship between the rack 16 and the drive gear 142, the linear travel power of the sliding frame 10 is converted into the rotational power of the drive gear 142, which drives the rotating shaft 141 and the transmission gear 1304 fixed on its outer side to rotate synchronously. The rotating shaft 141 transmits power in the opposite direction to the inside of the transmission assembly 13 through two sets of meshing transmission gears 1304, main bevel gear 1302 and secondary bevel gear 1301. After power input, the connecting shaft 135 is driven by the secondary bevel gear 1301 to drive the rotating roller 136 to rotate synchronously. Two sets of spiral guide bars 137 with opposite spiral directions are installed on the outside of the rotating roller 136. During rotation, the spiral guide bars 137 periodically compress the sliding column 138, pushing the sliding cylinder 132 to move vertically up and down along the inner wall of the fixed cylinder 131. The sliding cylinder 132 is linked to the bottom support 121 via the L-shaped rods 133 on both sides, driving the support 121 and the striking roller 122 to complete the lifting and lowering action synchronously. When the sliding cylinder 132 moves upward, it compresses the second spring 139, supporting... The frame 121 will also push the telescopic rod 123 and compress the first spring 124. When the sliding column 138 is separated from the highest point of the spiral guide bar 137, the striking roller 122 will quickly move down and strike the bottom plate 7 under the elastic force released by the first spring 124 and the second spring 139. This can efficiently break the thin ice on the surface of the bottom plate 7, as well as break the hardened thick ice and stubborn ice. Moreover, the second spring 139, together with the supporting effect of the first spring 124, makes the striking roller 122 adapt to the slight height difference on the surface of the bottom plate 7, ensuring that there are no dead angles in ice breaking.

[0054] While the transmission assembly 13 drives the de-icing assembly 12, the sliding frame 10 continuously moves towards the double doors 2. The drive gears 142 at both ends of the rotating shaft 141 mesh with the rack 16 fixed to the side wall of the compartment 1, assisting in the stable rotation of the rotating shaft 141. The rotating shaft 141 drives the central roller 145 in the middle to rotate synchronously. Relying on the sliding engagement between the annular wave groove 146 on the outside of the central roller 145 and the sliding ball 144 inside the reciprocating cylinder 143, the circumferential rotation of the rotating shaft 141 is converted into the transverse linear reciprocating motion of the reciprocating cylinder 143. The reciprocating cylinder 143 drives the slide block 147 to slide left and right along the limiting hole 15 at the bottom of the sliding frame 10, and finally drives the bottom connecting plate 148 and the slag pushing comb 149 to reciprocate and clean the surface of the bottom plate 7. The ice slag, frost debris and residual condensate after being broken by the striking roller 122 are pushed to the position of the strip hole 8 opened in the bottom plate 7. The collected ice slag, frost water and other dirt fall down through the strip hole 8 and are collected in the sludge collection box 602 inside the bracket 601. Under normal conditions, the sludge collection box 602 is locked and fixed to the bracket 601 by the locking screws 604 at both ends, which prevents the sludge collection box 602 from shifting during vehicle movement and cleaning operations, and prevents sewage leakage and ice spillage. After the cleaning operation is completed, the staff only needs to loosen the locking screws 604, hold the handle 603 to pull the sludge collection box 602 out of the bracket 601, empty the dirt inside and clean it, and then reset and lock the sludge collection box 602 to complete the whole set of defrosting, de-icing and sewage discharge operations.

Claims

1. A refrigerated truck compartment with embedded rigid polyurethane insulation board, comprising a compartment body (1), characterized in that: A double door (2) is installed at the opening on one side of the compartment (1), and a rigid polyurethane insulation layer (4) is embedded in the middle of the compartment (1). A refrigeration and insulation mechanism (5) is installed through the side of the compartment (1) away from the double door (2). A corrugated steel plate (3) is installed on the outside of the compartment (1), and a bottom plate (7) is installed at the bottom of the inner wall of the compartment (1). Several strip holes (8) are opened in the bottom plate (7). A collection component (6) is fixedly installed at the bottom of the compartment (1) corresponding to the bottom plate (7). A drive component (9) is fixedly installed at the top of the inner wall of the compartment (1). One end of the drive component (9) penetrates the compartment (1) and is fixed to one side of the compartment (1). A sliding frame (10) is fixedly connected in the drive component (9). The sliding frame (10) slides against the inner wall of the compartment (1), and a sliding frame (10) is opened in the sliding frame (10). The refrigeration and insulation mechanism (5) is installed through the clearance hole (11). The bottom of the sliding frame (10) is equipped with a de-icing component (12), and the bottom of the de-icing component (12) is attached to the bottom plate (7). A transmission component (13) is fixedly connected to the de-icing component (12). The transmission component (13) is fixedly connected to the bottom of the sliding frame (10). A residue pushing component (14) is installed on one side of the top of the transmission component (13). Both ends of the residue pushing component (14) are connected through the sliding frame (10) and meshed with a rack (16). The rack (16) is fixed on the side wall of the compartment (1). A limit hole (15) is opened at the bottom of the sliding frame (10). The residue pushing component (14) slides through the limit hole (15), and the bottom of the residue pushing component (14) is attached to the bottom plate (7).

2. The refrigerated truck compartment with embedded rigid polyurethane insulation board according to claim 1, characterized in that: The collection assembly (6) includes a bracket (601) fixed to the bottom of the carriage. Two sludge collection boxes (602) are slidably installed inside the bracket (601). The sludge collection boxes (602) are located below the bottom plate (7). A handle (603) is fixed to one side of the sludge collection box (602), and locking screws (604) are installed at both ends of the sludge collection box (602). The sludge collection box (602) is fixed to the outside of the bracket (601) by the locking screws (604).

3. The refrigerated truck compartment with embedded rigid polyurethane insulation board according to claim 1, characterized in that: The drive assembly (9) includes a support box (901), which is fixed to the top of the inner wall of the compartment (1). A lead screw (902) is rotatably connected inside the support box (901) via a bushing. One end of the lead screw (902) passes through the support box (901) and the compartment (1) and is fixed with a motor (906). The motor (906) is installed on the outside of the compartment. A nut (903) is threaded onto the outside of the lead screw (902). Openings are provided on the front and rear sides of the support box (901). There is a sliding hole (904), the nut (903) passes through the two sliding holes (904) and is fixed to the top opening of the sliding frame (10). The support box (901) has two ear plates (907) fixed at the end away from the motor (906). The ear plates (907) are fixed with guide rods (908) between them and the inner wall of the box (1). The two guide rods (908) slide through the sliding frame (10). A telescopic dustproof cover section (905) is installed between the nut (903) and the inner wall of the sliding hole (904).

4. A refrigerated truck compartment with embedded rigid polyurethane insulation board according to claim 1, characterized in that: A protective cover (18) is fixed on one side of the bottom of the sliding frame (10). The top of the protective cover (18) is inclined. The tops of the transmission assembly (13) and the residue pushing assembly (14) are located inside the protective cover (18). A guide seat (19) is fixed on the front and rear sides of the bottom of the sliding frame (10). The guide seat (19) is attached to the side wall of the compartment (1), and the top of the guide seat (19) is inclined downward. A slide groove (17) is provided on the front and rear sides of the sliding frame (10) and above the guide seat (19). The rack (16) is installed through the slide groove (17). The sliding frame (10) is slidably connected to the rack (16) through the slide groove (17).

5. A refrigerated truck compartment with an embedded rigid polyurethane insulation board according to claim 1, characterized in that: The de-icing assembly (12) includes two brackets (121), one end of which is fixed to the bottom of the transmission assembly (13). A striking roller (122) is installed between the two brackets (121). The striking roller (122) has several protrusions on its outside and is attached to the bottom plate (7). A telescopic rod (123) and a first spring (124) are fixed between the bracket (121) and the bottom of the sliding frame (10). The first spring (124) is sleeved on the outside of the telescopic rod (123).

6. A refrigerated truck compartment with an embedded rigid polyurethane insulation board according to claim 5, characterized in that: The transmission assembly (13) includes a fixed cylinder (131), which is fixed through the bottom of the sliding frame (10). A sliding cylinder (132) is slidably connected inside the fixed cylinder (131). L-shaped rods (133) are fixed on both sides of the sliding cylinder (132), and sliding holes (134) are opened on the fixed cylinder (131) corresponding to the positions of the two L-shaped rods (133). The L-shaped rods (133) slide through the sliding holes (134), and the bottom end of the L-shaped rods (133) is fixed to the bracket (121). A connecting shaft (135) is rotatably connected through a bushing in the cylinder (131). A rotating roller (136) is fixed to the outside of the connecting shaft (135). Two spiral guide strips (137) are fixed to the outside of the rotating roller (136). The spiral directions of the two spiral guide strips (137) are opposite, and a sliding column (138) is slidably overlapped at the lowest point of the spiral guide strips (137). The sliding column (138) is fixed to the inner wall of the sliding cylinder (132). A second spring (139) is fixed between the top of the sliding cylinder (132) and the inner wall of the fixed cylinder (131).

7. A refrigerated truck compartment with an embedded rigid polyurethane insulation board according to claim 6, characterized in that: The top end of the connecting shaft (135) passes through the fixed cylinder (131) and is fixed with a secondary bevel gear (1301). A main bevel gear (1302) is meshed on the secondary bevel gear (1301). A bearing seat (1303) is sleeved on one end of the main bevel gear (1302). The bearing seat (1303) is fixed in the sliding frame (10). A transmission gear (1304) is fixed on one end of the main bevel gear (1302) and on the outside of the residue pushing assembly (14). The two transmission gears (1304) mesh with each other.

8. A refrigerated truck compartment with an embedded rigid polyurethane insulation board according to claim 7, characterized in that: The residue pushing assembly (14) includes a rotating shaft (141), which rotates through a bushing in a sliding frame (10). Drive gears (142) are fixed at both ends of the rotating shaft (141), and the drive gears (142) mesh with a rack (16). One transmission gear (1304) is fixed outside the rotating shaft (141), and the rotating shaft (141) and the main bevel gear (1302) are connected by two transmission gears (1304). A center roller (145) is fixed in the middle of the rotating shaft (141), and a wave groove (146) is formed around the center roller (145). The reciprocating cylinder (143) is provided on the outside of the reciprocating cylinder (143). The two ends of the reciprocating cylinder (143) are connected to the rotating shaft (141) through the sliding sleeve. Several sliding balls (144) are fixed on the inner wall of the reciprocating cylinder (143). The sliding balls (144) are slidably connected in the wave groove (146). The bottom of the reciprocating cylinder (143) is fixedly connected to the slide seat (147). The slide seat (147) slides through the limiting hole (15). The bottom of the slide seat (147) is fixedly connected to the connecting plate (148). The bottom of the connecting plate (148) is equipped with slag pushing comb teeth (149). The slag pushing comb teeth (149) are in contact with the bottom plate (7) and are located on one side of the striking roller (122).

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