Energy-saving refrigerating unit with protective structure
By designing a double-layer protective shell and internal flow cover, filter mesh, adjustment components and control module in the refrigeration unit, the existing refrigeration unit is solved by solving the problem of erosion and inaccurate control in extreme environments, achieving more efficient and safer refrigeration performance.
Patent Information
- Application Number
- CN202510301276.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing refrigeration units are susceptible to dust, debris and corrosive gases in extreme environments, resulting in a decrease in heat exchange efficiency, increased energy consumption and shortened service life, and lack effective protective measures and precise automated control.
An energy-saving refrigeration unit with a protective structure was designed, and a protective shell with a double-layer structure was designed. The inner layer was stainless steel anti-corrosion plate, the surface was coated with polyvinylidene fluoride coating, and the outer layer was nano-aerogel thermal insulation layer. The flow cone, air intake and outlet filter, adjustment components and control modules are installed internally, and the flow deflection vane assembly and MPC control algorithm are used to achieve accurate control of the air flow rate.
By improving the design of protective structure and automated control, the service life of the refrigeration unit is extended, the heat exchange efficiency and energy-saving performance are improved, noise and turbulence are reduced, and operational safety is enhanced in extreme environments.
Smart Images
Figure CN119802751A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of refrigeration units, in particular to an energy-saving refrigeration unit with a protective structure. Background Art
[0002] A refrigeration unit is usually composed of a series of equipment such as a compressor, a condenser, and an evaporator. It has a very wide range of uses and is often used in various outdoor environments and extreme environments such as mines and tunnels. Existing refrigeration units usually adopt an open structure, and their condensers and evaporators are directly exposed to the external environment. They are easily corroded by external factors such as dust, debris, and corrosive gases, resulting in reduced heat exchange efficiency, increased energy consumption, and shortened service life. In addition, traditional refrigeration units lack effective protection measures and pose safety hazards when operating in harsh environments. In addition, the control of refrigeration units in the existing technology mostly adopts manual control or simple automatic control, and its control effect is very limited. Manual inspection is still required. For this reason, we propose an energy-saving refrigeration unit with a protective structure. Summary of the invention
[0003] The present invention provides an energy-saving refrigeration unit with a protective structure, which has the advantages of long service life, high heat exchange efficiency and good automatic adjustment performance, and solves the problems raised in the above background technology.
[0004] The present invention provides the following technical solution: an energy-saving refrigeration unit with a protective structure, comprising a protective shell, an air inlet filter is installed on one side of the protective shell, an air outlet filter is installed on the other side of the protective shell, a compressor is fixedly installed on one side of the protective shell, a flow guide component is fixedly installed inside the protective shell, a condenser and an evaporator are fixedly installed inside the flow guide component in the protective shell, an adjustment component is installed on the top of the protective shell, and a control module is fixedly installed on the front of the protective shell; The air guide assembly comprises an air guide cover, an air inlet grid is provided on one side of the air guide cover, an air outlet grid is provided on the other side of the air guide cover, a partition is fixedly installed in the middle of the air guide cover, an air permeable grid is provided on the partition, limit strips are fixedly provided at both ends of the partition, and an air guide blade assembly is movably installed inside the air permeable grid; The adjustment component includes a pressure block, a support frame is fixedly installed on the top of the pressure block, an electric push rod is fixedly installed on the end of the support frame, a clamping seat is fixedly installed on the end of the electric push rod, a driving motor is fixedly installed on the clamping seat, a driving gear is fixedly installed on the output shaft of the driving motor, and a transmission rack is movably embedded in the clamping seat.
[0005] In a preferred embodiment, the air inlet filter is detachably embedded in a lower part of one side of the protective shell and is located on the side where the condenser is located. The air outlet filter is detachably embedded in a upper part of the other side of the protective shell and is located on the side where the evaporator is located. The area of the air outlet filter is larger than the area of the air inlet filter and a honeycomb silencer is embedded in the interior of the air outlet filter.
[0006] In a preferred embodiment, the protective shell is a double-layer structure, the inner layer is a stainless steel anti-corrosion plate, the surface is coated with a polyvinylidene fluoride coating, and the outer layer is a nano aerogel insulation layer.
[0007] In a preferred embodiment, a V-shaped guide groove is provided on the inner surface of the guide cover along the direction of airflow flow, the air inlet grille is arranged as a gradually contracting structure along the direction of airflow, the cross-section of the air inlet grille is rectangular, the air outlet grille is arranged as a gradually expanding structure along the direction of airflow, the cross-section of the air outlet grille is rectangular, and the width is consistent with the width of the condenser and the evaporator, the partition separates the condenser and the evaporator into two areas, the air permeable grille is arranged with an equal cross-section, and the cross-sectional shape is also rectangular, and the limit strip is movably arranged to be snap-fitted inside the protective shell.
[0008] In a preferred embodiment, the guide vane assembly includes a guide vane, a first pin is fixedly mounted on one end of the guide vane, a second pin is fixedly mounted on the other end of the guide vane, and a driven gear is fixedly mounted on the end of the second pin.
[0009] In a preferred embodiment, the cross-sectional shape of the guide vane is an airfoil structure, the guide vane adopts an asymmetric structure arrangement at the front and rear ends, the leading edge and the trailing edge of the guide vane adopt different curvatures and the curvature of the trailing edge is twice the curvature of the leading edge, and the angle adjustment range of the guide vane is 0°≤θ≤60°.
[0010] In a preferred embodiment, a heating wire is embedded and installed on the surface of the guide plate, and a conductive contact connected to the heating wire is provided at the end of the first pin rod. The contact can be plugged into the conductive setting in the partition, and the driven gear and the adjustment component can be engaged and separated.
[0011] In a preferred embodiment, the support frame is arranged on the upper surface of one end of the pressure block, the pressure block is in a T-shaped structure and the bottom end is arranged to abut against the top of the partition, the driving gear and the transmission rack are meshed, the transmission rack is inserted into the side of the position where the driven gear is located and is meshed and separated from it by the telescopic control of the electric push rod, and the driving motor is a stepping motor.
[0012] In a preferred embodiment, the control module includes a control chip, a temperature sensor, and a humidity sensor, which uses model predictive control to dynamically optimize the control input in the future time domain so that the system can achieve optimal performance while satisfying the constraints. The control process is as follows: S1. System modeling and state-space equations; S2, prediction time domain and control time domain settings; S3, objective function design; S4, constraint setting; S5, rolling optimization solution; S6. Feedback correction.
[0013] The present invention has the following beneficial effects: 1. The energy-saving refrigeration unit with a protective structure is provided with a guide cover inside the protective shell, and an air inlet grid and an air outlet grid are respectively opened on both sides of the guide cover, and the air inlet grid and the air outlet grid are respectively configured with a gradually contracting setting and a gradually expanding setting, so that the airflow can be accelerated and evenly distributed when entering the guide cover, and the airflow can flow out smoothly when discharged from the guide cover, and turbulence and noise can be reduced, thereby improving the use effect of the refrigeration unit.
[0014] 2. The energy-saving refrigeration unit with a protective structure is provided with a partition in the middle part of the guide cover, and air-permeable grids are evenly opened on the partition, a guide blade assembly is movably arranged in the air-permeable grid, and an adjustment assembly is detachably engaged with the guide blade assembly above. In this way, the control module can be used to drive the adjustment assembly to rotate the guide blade assembly, thereby adjusting its angle to control the flow rate of the airflow. The control module is designed based on the MPC control algorithm, and can adjust the rotation angle of the guide blade assembly in real time according to various parameters such as environmental temperature and humidity, thereby enabling the refrigeration unit to have more precise energy-saving control performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a front cross-sectional structural schematic diagram of the present invention; Figure 5 It is a first stereoscopic schematic diagram of the partition and its connection structure of the present invention; Figure 6 It is a second stereoscopic schematic diagram of the partition and its connection structure of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the adjustment component of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the guide vane assembly of the present invention; Fig. 9 It is a schematic diagram of the control flow structure of the control module of the present invention.
[0016] In the figure: 1. protective shell; 2. air inlet filter; 3. air outlet filter; 4. compressor; 5. guide assembly; 51. guide cover; 52. air inlet grille; 53. air outlet grille; 54. partition; 55. breathable grille; 56. limit strip; 57. guide blade assembly; 571. guide vane; 572. first pin; 573. second pin; 574. driven gear; 6. condenser; 7. evaporator; 8. adjustment assembly; 81. pressure block; 82. support frame; 83. electric push rod; 84. clamp seat; 85. drive motor; 86. drive gear; 87. transmission rack; 9. control module. DETAILED DESCRIPTION
[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The energy-saving refrigeration unit with a protective structure involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
[0018] See also Figure 1-3 , an energy-saving refrigeration unit with a protective structure, comprising a protective shell 1, an air inlet filter 2 is installed on one side of the protective shell 1, an air outlet filter 3 is installed on the other side of the protective shell 1, a compressor 4 is fixedly installed on one side of the protective shell 1, a flow guide component 5 is fixedly installed inside the protective shell 1, a condenser 6 and an evaporator 7 are fixedly installed inside the flow guide component 5 located in the protective shell 1, an adjustment component 8 is installed on the top of the protective shell 1, and a control module 9 is fixedly installed on the front of the protective shell 1; Compared with the prior art, the present invention provides a deflector 51 inside the protective shell 1, and an air inlet grille 52 and an air outlet grille 53 are respectively provided on both sides of the deflector 51, and the air inlet grille 52 and the air outlet grille 53 are respectively configured in a gradually contracting manner and a gradually expanding manner, so that the airflow can be accelerated and evenly distributed when entering the deflector 51, and the airflow can flow out smoothly inside the exhaust deflector 51, and turbulence and noise can be reduced, thereby improving the use effect of the refrigeration unit, and a partition 54 is provided in the middle of the deflector 51, and the air inlet grille 52 and the air outlet grille 53 are evenly distributed on the partition 54. A ventilation grille 55 is provided, in which a guide vane assembly 57 is movably arranged, and an adjustment assembly 8 is detachably engaged with the guide vane assembly 57 from above, so that the control module can be used to drive the adjustment assembly 8 to rotate the guide vane assembly 57, thereby adjusting its angle to control the flow rate of the airflow. The control module is designed based on the MPC control algorithm, and can adjust the rotation angle of the guide vane assembly 57 in real time according to various parameters such as environmental temperature and humidity, thereby enabling the refrigeration unit to have more precise energy-saving control performance.
[0019] See also Figure 1-3 , an energy-saving refrigeration unit with a protective structure, comprising an air inlet filter 2, the air inlet filter 2 is located at the bottom of one side of the protective shell 1 and is detachably embedded and installed, and is located on the side where the condenser 6 is located, and an air outlet filter 3 is located at the top of the other side of the protective shell 1 and is detachably embedded and installed, and is located on the side where the evaporator 7 is located, the area of the air outlet filter 3 is larger than the area of the air inlet filter 2, and a honeycomb muffler is embedded in the air outlet filter 3; In this embodiment, it should be noted that the principle of cold air sinking can be utilized to make the air entering from the bottom more evenly distributed, reduce the flow resistance of the airflow, avoid direct airflow short-circuiting between the air inlet filter 2 and the air outlet filter 3, reduce heat loss, and at the same time ensure that the airflow passes through the condenser 6 and the evaporator 7 evenly, avoid local airflow dead corners, and reduce the noise generated by the use of the equipment.
[0020] See also Figure 1-4 , an energy-saving refrigeration unit with a protective structure, comprising a protective shell 1, the protective shell 1 is a double-layer structure, the inner layer is a stainless steel anti-corrosion plate, the surface is coated with a polyvinylidene fluoride coating, and the outer layer is a nano aerogel insulation layer; In this embodiment, it should be noted that in this way, during the use of the equipment, the internal components of the unit can be effectively isolated from the external environment and the integrity of the internal components of the equipment can be protected, and the heat preservation and insulation can be played to reduce energy consumption.
[0021] See also Figure 2-6, an energy-saving refrigeration unit with a protective structure, comprising a flow guide assembly 5, the flow guide assembly 5 comprising a flow guide cover 51, an air inlet grid 52 is provided on one side of the flow guide cover 51, an air outlet grid 53 is provided on the other side of the flow guide cover 51, a partition 54 is fixedly installed in the middle of the flow guide cover 51, a breathable grid 55 is provided on the partition 54, limiting strips 56 are fixedly provided at both ends of the partition 54, and a flow guide blade assembly 57 is movably installed inside the breathable grid 55; In the present embodiment, it should be noted that a V-shaped guide groove is provided on the inner surface of the guide cover 51 along the direction of the air flow, the air inlet grid 52 is arranged as a gradually contracting structure along the direction of the air flow, the cross section of the air inlet grid 52 is rectangular, the air outlet grid 53 is arranged as a gradually expanding structure along the direction of the air flow, the cross section of the air outlet grid 53 is rectangular, and the width is consistent with the width of the condenser 6 and the evaporator 7, the partition 54 separates the condenser 6 and the evaporator 7 into two areas, the air permeable grid 55 is arranged as a uniform cross section, and the cross section shape is also rectangular, and the limit strip 56 is snap-fitted inside the protective shell 1 The movable setting can ensure that the airflow can flow smoothly inside the guide cover 51, and the partition 54 can be used to avoid the mixing of the airflow in the area where the condenser 6 and the evaporator 7 are located, thereby ensuring the heat exchange effect of the equipment. The setting of the guide groove can guide the flow of the airflow boundary layer and reduce the flow loss. The setting of the air inlet grille 52 can gradually accelerate the airflow in the process of entering the guide cover 51, thereby increasing the heat loss of the condenser 6. The setting at the air outlet grille 53 can make the airflow tend to flow smoothly when discharged, reduce turbulence and noise, and improve the use effect of the equipment.
[0022] The design height formulas of the above-mentioned air inlet grid 52 and air outlet grid 53 are as follows: The cross-sectional height h(x) of the air intake grille 52 varies with the length x: h in is the entrance height (unit: mm); h mid is the height of the ventilation grid (unit: mm); L in is the length of the inlet section (unit: mm); x is the length coordinate of the entrance section (unit: mm); The cross-sectional height h(x)h of the air outlet grid 53 varies with the length x: ; h out is the outlet height (unit: mm); L out is the length of the outlet section (unit: mm); x is the length coordinate of the outlet section (unit: mm).
[0023] See also Figure 4-8 , an energy-saving refrigeration unit with a protective structure, comprising a guide vane assembly 57, the guide vane assembly 57 comprising a guide vane 571, a first pin 572 is fixedly mounted on one end of the guide vane 571, a second pin 573 is fixedly mounted on the other end of the guide vane 571, and a driven gear 574 is fixedly mounted on the end of the second pin 573; In the present embodiment, it should be noted that the cross-sectional shape of the guide vane 571 is an airfoil structure, the guide vane 571 adopts an asymmetric structure at the front and rear ends, the leading edge and the trailing edge of the guide vane 571 adopt different curvatures and the curvature of the trailing edge is twice the curvature of the leading edge, the angle adjustment range of the guide vane 571 is 0°≤θ≤60°, the interior of the guide vane 571 is embedded with a heating wire at the surface position, the end of the first pin 572 is provided with a conductive contact connected to the heating wire, the contact can be plugged into the conductive setting in the partition 54, and the driven gear 574 is connected to the adjustment The node assembly 8 is configured to be meshable and separable, so that the guide vane 571 can ensure that the air flows evenly through the condenser 6 and the evaporator 7, avoiding local airflow dead angles. At the same time, the angle adjustment of the guide vane 571 can enhance the heat exchange effect between the air and the heat exchanger surface, and the rotating setting can also reduce the low-temperature area on the surface of the evaporator 7 and delay frosting. The setting of the heating wire can also avoid frosting on the surface of the guide vane 571 to a certain extent, thereby ensuring the patency of the airflow channel inside the entire device and ensuring the internal heat exchange effect. The adjustment angle θ of the guide plate 571 is related to the ambient temperature T env and humidity H env The relationship is: in: θ min and θ max is the blade angle adjustment range; k is the adjustment coefficient (unit: °C -1 ); T ref , H ref is the reference temperature and humidity (unit: °C, %RH).
[0024] See also Figure 1-7 , an energy-saving refrigeration unit with a protective structure, comprising an adjustment component 8, the adjustment component 8 comprises a pressing block 81, a support frame 82 is fixedly mounted on the top of the pressing block 81, an electric push rod 83 is fixedly mounted on the end of the support frame 82, a clamping seat 84 is fixedly mounted on the end of the electric push rod 83, a driving motor 85 is fixedly mounted on the clamping seat 84, a driving gear 86 is fixedly mounted on the output shaft of the driving motor 85, and a transmission rack 87 is embedded and movably mounted on the clamping seat 84; In this embodiment, it should be noted that the support frame 82 is arranged on the upper surface of one end of the pressure block 81, the pressure block 81 is in a T-shaped structure and the bottom end is arranged to abut against the top of the partition 54, the driving gear 86 and the transmission rack 87 are meshed, the transmission rack 87 is inserted to the side of the position where the driven gear 574 is located and is meshed and separated from it by the telescopic control of the electric push rod 83, and the driving motor 85 is a stepping motor, so that when it is necessary to adjust the angle of the guide plate 571, the electric push rod 83 can be used to push the transmission rack 87 to mesh with the driven gear 574, and then the driving motor 85 is rotated to drive the driving gear 86 to drive the transmission rack 87 to move up and down, thereby driving the guide plate 571 to rotate to achieve angle adjustment, so as to achieve control of the airflow.
[0025] See also Figure 1-9 , an energy-saving refrigeration unit with a protective structure, including a control module 9, the control module 9 includes a control chip, a temperature sensor, and a humidity sensor, which uses model predictive control to dynamically optimize the control input in the future time domain, so that the system can achieve optimal performance under the constraints, as follows: 1. System Modeling and State-Space Equations Thermodynamic model: Establish the dynamic heat exchange equation between the condenser and the evaporator: Among them C cond / C evap is the heat capacity, Q in / Q out is the heat flow; Frost prediction model: Calculate the frost rate R based on real-time data of humidity and temperature frost : State space representation: State variables Control variables Output variables ; 2. Prediction time domain and control time domain settings Prediction time domain N p : 10 control cycles (5 seconds per cycle, 50 seconds in total); Control time domain N c : 5 control cycles (5 seconds per cycle, 25 seconds in total); Sampling period T: 5 seconds (balance between real-time performance and computational complexity); 3. Objective Function Design Weight matrix: Q = diag (1.0) (COP tracking weight) S=diag(0.05) (frost suppression weight) R=diag(0.1,0.1) (control amount change rate penalty); 4. Constraint Setting Control variable constraints: 30Hz≤f comp ≤80Hz, 0º≤θ≤60º State variable constraints: P cond ≤2.5MPa, R frost ≤0.3mm / min Control increment constraints: 5. Rolling Optimization Solution initialization: Load the current state x(k) and the reference trajectory COP ref =4.5; Predict environmental temperature and humidity changes (predict T in the next 50 seconds using the ARIMA model) env , H env ); Prediction model run: Based on the current control input u(k), the state space model is used to predict the future N p The state of step x(k+1),...,x(k+N p ); Calculate the frost rate R frost (k+i) and energy efficiency ratio COP(k+i); Optimize question construction: Convert the objective function J into a quadratic programming (QP) form: (H is the Hessian matrix, f is the gradient vector); Solve the QP problem: Use the interior point method (IPM) solver to complete the optimization calculation within 10ms; Output optimal control sequence ; Implement control volume: Only the optimal control quantity at the current moment is used , update the compressor frequency and guide vane angle; 6. Feedback Correction Status Update: Get the actual T through the sensor cond (k+1), T evap (k+1), P cond (k+1), correct the model prediction error; Model parameter adaptation: The state space matrices A and B are updated online using the recursive least squares method: ; (θ=[A;B], φ is the regression matrix, K is the Kalman gain).
[0026] Working principle: when the air flows, it first passes through the air intake filter 2 into the protective shell 1, and then passes through the air intake grid 52 to contact the condenser 6, cooling it and allowing the gas carrying heat to pass through the breathable grid 55 to enter the other side and contact the evaporator 7, thereby effectively heating the evaporator 7. After the evaporator 7 absorbs the heat in the air, the cold air is discharged from one end of the air outlet filter 3. The control module 9 detects the temperature and humidity of the environment in real time according to the control system, and then controls the extension and retraction of the electric push rod 83. When it is necessary to adjust the angle of the guide plate 571, the electric push rod 83 is started to extend so that the transmission rack 87 is engaged with the driven gear 574, and then the drive motor 85 is started to rotate to drive the transmission rack 87 to move longitudinally, thereby driving the driven gear 574 to rotate, thereby adjusting the blade angle.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An energy-saving refrigeration unit with a protective structure, comprising a protective housing (1), characterized in that: An air inlet filter (2) is installed on one side of the protective shell (1), an air outlet filter (3) is installed on the other side of the protective shell (1), a compressor (4) is fixedly installed on one side of the protective shell (1), a flow guide component (5) is fixedly installed inside the protective shell (1), a condenser (6) and an evaporator (7) are fixedly installed inside the flow guide component (5) and located in the protective shell (1), an adjustment component (8) is installed on the top of the protective shell (1), and a control module (9) is fixedly installed on the front of the protective shell (1); The flow guide assembly (5) comprises a flow guide cover (51), one side of the flow guide cover (51) is provided with an air inlet grille (52), the other side of the flow guide cover (51) is provided with an air outlet grille (53), a partition plate (54) is fixedly installed in the middle of the flow guide cover (51), a breathable grille (55) is provided on the partition plate (54), limiting strips (56) are fixedly provided at both ends of the partition plate (54), and a flow guide blade assembly (57) is movably installed inside the breathable grille (55); The adjustment assembly (8) comprises a pressing block (81), a support frame (82) is fixedly mounted on the top of the pressing block (81), an electric push rod (83) is fixedly mounted on the end of the support frame (82), a clamping seat (84) is fixedly mounted on the end of the electric push rod (83), a driving motor (85) is fixedly mounted on the clamping seat (84), a driving gear (86) is fixedly mounted on the output shaft of the driving motor (85), and a transmission rack (87) is movably embedded in the clamping seat (84).
2. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The air inlet filter (2) is located below one side of the protective shell (1) and is detachably embedded therein, and is located on the side where the condenser (6) is located. The air outlet filter (3) is located above the other side of the protective shell (1) and is detachably embedded therein, and is located on the side where the evaporator (7) is located. The area of the air outlet filter (3) is larger than the area of the air inlet filter (2), and a honeycomb silencer is embedded therein.
3. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The protective shell (1) is a double-layer structure, the inner layer is a stainless steel anti-corrosion plate, the surface is coated with a polyvinylidene fluoride coating, and the outer layer is a nano aerogel insulation layer.
4. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The inner surface of the air guide cover (51) is provided with a V-shaped guide groove along the direction of air flow; the air inlet grille (52) is arranged as a gradually contracting structure along the direction of air flow; the cross section of the air inlet grille (52) is rectangular; the air outlet grille (53) is arranged as a gradually expanding structure along the direction of air flow; the cross section of the air outlet grille (53) is rectangular; the width of the air outlet grille (53) is consistent with the width of the condenser (6) and the evaporator (7); the partition (54) separates the condenser (6) and the evaporator (7) into two areas; the air permeable grille (55) is arranged with a uniform cross section and a rectangular cross section; the limit strip (56) is movably arranged in a snap connection inside the protective housing (1).
5. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The guide vane assembly (57) comprises a guide vane (571), a first pin rod (572) being fixedly mounted on one end of the guide vane (571), a second pin rod (573) being fixedly mounted on the other end of the guide vane (571), and a driven gear (574) being fixedly mounted on the end of the second pin rod (573).
6. The energy-saving refrigeration unit with a protective structure according to claim 5, characterized in that: The cross-sectional shape of the guide vane (571) is an airfoil structure. The guide vane (571) is arranged with an asymmetric front and rear end structure. The leading edge and the trailing edge of the guide vane (571) have different curvatures and the curvature of the trailing edge is twice the curvature of the leading edge. The angle adjustment range of the guide vane (571) is 0°≤θ≤60°.
7. The energy-saving refrigeration unit with a protective structure according to claim 6, characterized in that: A heating wire is embedded and installed on the surface of the guide plate (571), and a conductive contact connected to the heating wire is provided at the end of the first pin (572), and the contact can be plugged into the partition (54) for conduction, and the driven gear (574) and the adjustment component (8) can be meshed and separated.
8. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The support frame (82) is arranged on the upper surface of one end of the pressing block (81); the pressing block (81) is in a T-shaped structure and its bottom end is arranged to abut against the top of the partition (54); the driving gear (86) and the transmission rack (87) are arranged in meshing relationship; the transmission rack (87) is inserted into the side of the position where the driven gear (574) is located and is arranged to be meshed and separated from the driven gear (574) through telescopic control of the electric push rod (83); and the driving motor (85) is a stepping motor.
9. The energy-saving refrigeration unit with a protective structure according to claim 1, characterized in that: The control module (9) comprises a control chip, a temperature sensor, and a humidity sensor, and uses model predictive control to dynamically optimize control inputs in the future time domain, so that the system achieves optimal performance while satisfying constraint conditions.