Evaporator and ship cabin refrigeration equipment using the same

Abstract

The present application relates to the technical field of ship refrigeration, in particular to an evaporator and a cabin refrigeration equipment using the same, which comprises a shell, a distance partition plate, a tube plate, heat exchange pipes, a distribution assembly and a moving assembly, a refrigerant inlet and a refrigerant outlet are formed in the front end of the shell, the tube plate is installed behind the refrigerant inlet and the refrigerant outlet, the heat exchange pipes are installed on the tube plate, the tube plate and the shell form a flow cavity, the distance partition plate is installed in the flow cavity, sliding rails are formed in the distance partition plate, a chilled water inlet and a chilled water outlet are formed in the upper part of the shell, the distribution assembly is installed in the chilled water inlet and is used to adjust the refrigerant flow by changing the chilled water flow, the moving assembly is connected to the distribution assembly and is used to adjust the heat exchange amount by changing the flow of the distribution assembly, and the moving assembly is connected to the heat exchange pipes. The present application can realize the adjustment of the fresh-keeping and refrigeration temperature by changing the flow, can make the refrigerant uniformly distributed, and can improve the working efficiency of the evaporator.

Description

Technical Field

[0001] This invention relates to the field of marine refrigeration technology, specifically to an evaporator and a cabin refrigeration device using the evaporator. Background Technology

[0002] Vapor compression refrigeration systems are a commonly used refrigeration method, often used in refrigerators, air conditioners, and cold storage. A vapor compression refrigeration system mainly consists of four parts: a compressor, a condenser, an expansion valve, and an evaporator. During the working cycle, the four components are connected in sequence by pipes to form a completely closed system. By changing the state of the refrigerant in the refrigeration system, heat is continuously absorbed from the evaporator and released in the condenser, thereby achieving the purpose of refrigeration.

[0003] On ships, evaporative compression refrigeration systems are an indispensable part of the ship's system in order to keep food fresh and refrigerated in the hold. Ship refrigeration connects the evaporator to the cold storage. The evaporator absorbs a large amount of heat to regulate the temperature inside the cold storage, so that the temperature inside the cold storage reaches the temperature required for food preservation and refrigeration. When the staff starts the evaporative compression refrigeration system, they inject refrigerant and chilled water into the evaporator. The refrigerant reacts with the chilled water, and the refrigerant continuously evaporates in the evaporator, absorbing a large amount of heat from the outside, thereby cooling the cold storage.

[0004] During the operation of the evaporator, uneven distribution of refrigerant within the evaporator will lead to reduced evaporator efficiency. When too much refrigerant flows in, insufficient chilled water injection will cause frost to form on the evaporator, affecting heat exchange between the evaporator and the outside environment. When too little refrigerant flows in, too much chilled water is injected, and the heat absorbed by the refrigerant evaporation will not reach the required heat, resulting in excessively high cooling temperatures. At the same time, it will be impossible to regulate the flow rate of chilled water in the evaporator to allow the refrigerant and chilled water to react fully and absorb heat through evaporation.

[0005] Existing technology provides a small-diameter evaporator that evenly distributes refrigerant into each small heat exchange tube. By reducing the diameter of the heat exchange tubes, the heat exchange area is reduced, and the amount of refrigerant injected is also reduced, thereby reducing the resistance to refrigerant flow in the heat exchange tubes and improving the heat exchange efficiency of the evaporator. However, it does not solve the problem of matching the flow rates between the refrigerant and the chilled water.

[0006] In view of this, in order to overcome the above-mentioned technical problems, the present invention designs an evaporator and a ship cabin refrigeration device using the evaporator, thereby solving the above-mentioned technical problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: how to control the temperature of refrigerated storage by changing the flow rate.

[0008] To achieve the above objectives, the present invention proposes the following technical solution: an evaporator, comprising an evaporator body, a partition plate, a tube sheet, heat exchange tubes, a flow distribution assembly, and a moving assembly. The evaporator body has a refrigerant inlet and a refrigerant outlet at its front end, located on the same central axis. The refrigerant inlet is for the entry of liquid refrigerant, and the refrigerant outlet is for the exit of the evaporated refrigerant gas. A tube sheet is fixedly installed behind the refrigerant inlet and outlet. Circular mounting holes are arrayed on the tube sheet. Inclined grooves are formed on both sides of the tube sheet, and heat exchange tubes are fixedly installed on the circular mounting holes. The heat exchange tubes facilitate the flow of refrigerant, achieving heat exchange between the refrigerant and chilled water, thereby achieving a cooling effect. The tube sheet and the evaporator body form a flow cavity for the flow of liquid refrigerant and evaporated gaseous refrigerant. A partition plate is installed within the flow cavity. The partition plate is used to separate the refrigerant at different stages of operation, preventing the evaporated refrigerant from contacting the unevaporated refrigerant and affecting the operation of the evaporator. The partition plate has a slide rail to restrict the movement of the flow-dividing assembly. A chilled water inlet and outlet are located on the top of the evaporator body, at the front and rear ends of the evaporator body, respectively. The chilled water exchanges heat with the refrigerant, evaporating the liquid refrigerant into a gaseous state and absorbing external heat. A flow-dividing assembly is installed at the chilled water inlet to adjust the refrigerant flow rate by changing the chilled water flow rate. The refrigerant flow rate is controlled according to the chilled water flow rate to achieve uniformity between chilled water and refrigerant flow. A moving component is connected to the flow-dividing assembly to regulate the heat exchange by changing the refrigerant flow rate. The moving component is connected to the heat exchange tubes.

[0009] Preferably, the flow distribution assembly includes a flap, a rotating shaft, a crank, a connecting rod, a baffle plate, and a push rod; an installation hole is provided at the bottom of the chilled water inlet on the evaporator body; the flap and the chilled water inlet at the top of the evaporator body are rotatably connected through the installation hole at the bottom of the chilled water inlet; the flap adjusts its own angle by the chilled water flow rate to achieve uniform heat exchange, and controls the opening and closing angle between itself and the chilled water inlet by the chilled water flow rate to control the refrigerant flow rate, thereby unifying the flow rates of both, improving the working efficiency of the evaporator, and simultaneously achieving temperature regulation; a rotating shaft is fixedly installed on the flap, which changes the position of the baffle plate by converting rotational motion into linear motion; a crank is installed at the other end of the rotating shaft; the crank is connected to the connecting rod; A baffle plate is connected to the other end of the connecting rod. The rotating shaft, crank, connecting rod, and baffle plate constitute a crank-slider mechanism. The rotating shaft provides a power source for the crank, and the crank drives the connecting rod to move the baffle plate. The baffle plate is mounted on a partition plate with a vertical partition plate groove. The groove restricts the baffle plate's degree of freedom, preventing it from moving back and forth and ensuring that it moves along a fixed trajectory. The baffle plate achieves uniform refrigerant distribution by adjusting the chilled water flow rate. A push rod is connected to the rear end of the baffle plate, which converts vertical motion into horizontal motion to drive the moving component. The push rod is fixedly connected to the baffle plate. The push plate is connected to the moving component through inclined grooves on both sides of the tube sheet. When the baffle plate moves, the push plate changes the vertical movement to horizontal movement, thus controlling the movement component.

[0010] Preferably, the moving assembly includes a drive plate, a baffle plate, a connecting rod, a driving rod, a driven rod, a transmission rod, and an auxiliary rod; the drive plate is connected to the flow distribution assembly; the drive plate converts vertical motion into horizontal movement through the flow distribution assembly, thereby displacing the baffle plate; the drive plate is fixedly connected to a push plate, and when the push plate moves vertically, under the action of the tube sheet, the push plate pushes the drive plate to move horizontally, thereby changing the direction of displacement; a horizontal chute is provided in front of the drive plate and is fixedly connected to the evaporator body; a driving rod is connected to the bottom end of the drive plate; a rectangular groove is provided at the lower end of the driving rod and is slidably connected to the drive rod; a driven rod is rotatably connected to the middle end of the driving rod; the driving rod and the driven rod are hinged, and the hinge point of the driving rod and the driven rod is fixedly connected to the beginning end of the chute; a transmission rod is rotatably connected to the front end of the driving rod. The active rod and the drive rod are hinged together. The hinge point between the active rod and the drive rod is located on one side of the chute and is rotatably connected to the chute. An auxiliary rod is installed between the drive rod and the driven rod. The drive rod and the driven rod are respectively hinged to the auxiliary rod. The hinge point between the driven rod and the auxiliary rod is located on the other side of the chute and is slidably connected to the chute. The hinge point between the drive rod and the auxiliary rod is located inside the chute and is slidably connected to the chute. The active rod, the driven rod, the drive rod, and the auxiliary rod form a parallelogram structure. The movement of the whole structure is achieved by changing the angle between the active rods by swinging. The chute restricts the movement of the hinge point between the drive rod and the auxiliary rod, causing it to move in a straight line. A baffle plate is installed on the hinge point between the drive rod and the auxiliary rod, which adjusts the heat by changing its own range of movement. A connecting rod is installed between the baffle plates, which realizes the synchronous movement between the baffle plates.

[0011] Preferably, an inclined plate is provided at the top of the slide rail; the upper end of the inclined plate is flush with the refrigerant inlet; the inclined plate changes the refrigerant flow rate to support the slide rail. The inclined plate is fixedly installed at the top of the slide rail and is connected to the refrigerant inlet. This can reduce the flow rate of the refrigerant when it enters and slow down the impact of the refrigerant on the baffle, thereby improving the support capacity of the slide rail and preventing the slide rail from deforming and breaking due to the impact force of the baffle.

[0012] Preferably, the flap is rotatably installed inside the chilled water inlet pipe; a semi-cylindrical groove is provided at the bottom of the flap to be fixedly installed with the rotating shaft; the flap controls the refrigerant flow by changing the position of the baffle plate by converting the rotational motion into linear motion. The baffle plate and the rotating shaft form a one-way valve structure, which can effectively control the flow of chilled water, and thus control the flow of refrigerant, so that the flow of refrigerant and chilled water are unified, avoiding insufficient refrigerant evaporation or too little refrigerant affecting the evaporator's cooling. At the same time, it prevents chilled water backflow. When chilled water no longer enters, the flap can quickly close to shut off the chilled water inlet, preventing chilled water backflow from affecting the normal operation of the refrigeration equipment.

[0013] Preferably, the baffle plate has a semi-circular structure; the baffle plate has liquid inlet holes arranged in an equilateral triangle; the baffle plate changes the diameter of the heat exchange tube by gradually moving. The baffle plate is located at the rear end of the refrigerant inlet. When the refrigerant enters the evaporator, the baffle plate can effectively reduce the impact force of the refrigerant when it enters, slow down the refrigerant flow rate, and prevent excessive refrigerant from flowing in. When the liquid refrigerant accumulates at the bottom, the refrigerant turbulence is high. The equilateral triangle arrangement is more compact, and the number of openings is large, which can evenly distribute the liquid, accelerate the refrigerant flow rate, and prevent refrigerant accumulation. At the same time, the diameter of the circular liquid inlet holes on the baffle plate is the same as the diameter of the heat exchange tube. The circular liquid inlet holes on the baffle plate and the heat exchange tube are installed in a staggered manner. When the baffle plate moves upward, the liquid inlet holes on the baffle plate and the heat exchange tube are staggered, and the heat exchange tube gradually opens, realizing the uniform distribution of refrigerant and avoiding uneven distribution of refrigerant in the heat exchange tube.

[0014] Preferably, the front end of the drive plate is provided with a right-angled triangular protrusion; the front end of the protrusion is provided with a protrusion that is slidably connected to the rectangular groove at the bottom end of the active rod; when the drive plate moves forward, it drives the bottom protrusion to move together, and the protrusion drives the active rod to swing left and right through its own linear movement to adjust the position of the baffle plate. The right-angled triangular protrusion is in close contact with the active rod, and the right-angled triangular protrusion can swing the active rod at different angles by changing its own position, thereby changing the moving distance of the baffle plate; when the drive plate moves forward, the protrusion pushes the distance between the active rod and the driven rod to decrease, thereby causing the baffle plate to slide and change its positional relationship with the heat exchange tube; when the drive plate moves backward, the protrusion pulls the active rod to swing, the angle between the active rod and the driven rod increases, and the baffle plate is reset.

[0015] Preferably, the drive plate and the baffle plate are installed at both ends of the chilled water inlet; the drive plate has a cylindrical structure; the drive plate cleans the frost on the surface of the heat exchange tube by moving relative to the baffle plate. When the evaporator is working, due to the change in the internal temperature of the evaporator, frost will condense on the surface of the heat exchange tube, which will hinder the heat exchange efficiency of the heat exchange tube and cause the cooling temperature to rise. When the drive plate and the baffle plate move, the drive plate and the baffle plate will scrape the outer wall of the heat exchange tube to remove the frost, thereby improving the heat conduction and thus improving the working efficiency of the evaporator.

[0016] Preferably, the baffle is not perfectly circular; the baffle is divided into active baffle and driven baffle; the active baffle and driven baffle are arranged alternately; the active baffle and driven baffle are paired together and moved synchronously by connecting rods; the baffle controls the flow rate of chilled water by changing its position relative to the chilled water inlet; the active baffle and driven baffle are fixedly connected by connecting rods, and the active baffle and driven baffle form a complete circle through the connecting rods. When chilled water enters, the baffle moves closer to the chilled water inlet, reducing the distance between the tube sheet and the baffle, and increasing the flow rate of chilled water. When the chilled water flow rate is larger, the refrigerant flow rate is larger, and at this time, the chilled water flow rate needs to be increased to facilitate the rapid filling of the entire evaporator with chilled water. The closer the baffle is to the chilled water inlet, the narrower the chilled water flow path, and the greater the chilled water flow rate, so that the heat exchange between the chilled water and the refrigerant is fully completed, improving the working efficiency of the evaporator.

[0017] Preferably, a ship's cabin refrigeration device includes a compressor with an air intake and an exhaust port; a condenser is connected to the compressor exhaust port; the condenser has a refrigerant inlet and a refrigerant outlet; the refrigerant inlet of the condenser is connected to the compressor exhaust port; the refrigerant outlet of the condenser is connected to an expansion valve; the expansion valve has a high-pressure inlet and a low-pressure outlet; the high-pressure inlet of the expansion valve is connected to the refrigerant outlet of the condenser; the refrigerant inlet on the evaporator body is connected to the low-pressure outlet of the expansion valve; the refrigerant outlet on the evaporator body is connected to the compressor intake port; the evaporator body adjusts the refrigerant injection amount and changes the refrigerant phase by adjusting the amount of chilled water injected.

[0018] The evaporator is connected to the ship's cold storage. By exchanging heat between the low-pressure, low-temperature liquid refrigerant in the evaporator and the chilled water, the refrigerant evaporates and absorbs heat, lowering the temperature inside the cold storage to reach the required preservation and refrigeration temperature for food. The evaporated gaseous refrigerant enters the compressor from the evaporator, where it is compressed into a high-temperature, high-pressure gaseous refrigerant. The high-pressure, high-temperature gaseous refrigerant vapor flows into the condenser, where it exchanges heat with the cooling water and condenses into a high-pressure liquid refrigerant that enters the expansion valve. The high-pressure liquid refrigerant then becomes a low-temperature, low-pressure liquid refrigerant, which enters the evaporator to continue evaporating and absorbing heat, thus completing the cycle.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. An evaporator and a ship cabin refrigeration device using the evaporator of the present invention, wherein the device achieves the unification of the flow rate of chilled water and the flow rate of refrigerant by changing the flow rate of liquid, thereby achieving the unification of heat exchange, improving the working efficiency of the evaporator, and ensuring the preservation and refrigeration temperature.

[0021] 2. An evaporator and a ship cabin refrigeration device using the evaporator of the present invention achieve uniform distribution of refrigerant in the heat exchange tube by changing the flow rate, so that the refrigerant can evaporate fully and avoid a decrease in evaporation efficiency and unstable refrigeration temperature.

[0022] 3. An evaporator and a ship cabin refrigeration device using the evaporator of the present invention, wherein the device realizes the relative movement between the moving component and the heat exchange tube through the cooperation of the flow distribution component and the moving component, thereby cleaning the outer wall of the heat exchange tube and avoiding frost on the surface of the heat exchange tube, which would affect the heat exchange efficiency and cause insufficient cooling of the evaporator. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 This is the invention Figure 2 A magnified view of part A;

[0027] Figure 4 This is the invention Figure 2 A magnified view of section B;

[0028] Figure 5 This is an overall diagram of the current splitter component of the present invention;

[0029] Figure 6 This is a top view of the diversion component of the present invention;

[0030] Figure 7 This is an overall diagram of the mobile component of the present invention;

[0031] Figure 8 This is a top view of the movable component of the present invention;

[0032] Figure 9 This is a flowchart of the ship's refrigeration system.

[0033] In the diagram: 1. Evaporator body; 11. Chilled water inlet; 12. Chilled water outlet; 13. Refrigerant inlet; 14. Refrigerant outlet; 2. Tube sheet; 21. Flow chamber; 3. Baffle plate; 31. Slide rail; 311. Inclined plate; 4. Heat exchange tube; 5. Flow distribution assembly; 51. Flip plate; 52. Rotating shaft; 53. Crank; 54. Connecting rod; 55. Baffle plate; 56. Push rod; 6. Moving assembly; 61. Drive plate; 611. Protrusion; 62. Slide groove; 63. Baffle plate; 631. Active baffle plate; 632. Driven baffle plate; 64. Connecting rod; 65. Active rod; 66. Driven rod; 67. Transmission rod; 68. Auxiliary rod; 7. Compressor; 8. Condenser; 9. Expansion valve. Detailed Implementation

[0034] like Figure 1 , Figure 2 and Figure 4As shown, an evaporator and a ship cabin refrigeration device using the evaporator are disclosed. The evaporator body 1 includes a partition plate 3, a tube sheet 2, heat exchange tubes 4, a flow distribution assembly 5, and a moving assembly 6. A support is fixedly installed at the lower end of the evaporator body 1, and the support is fixedly connected to the ship cabin to improve the stability of the evaporator body 1 and prevent the evaporator body 1 from moving when the ship rocks. A refrigerant inlet 13 and a refrigerant outlet 14 are opened at the front end of the evaporator body 1. The refrigerant inlet 13 and the refrigerant outlet 14 are located on the same central axis. The refrigerant inlet 13 is used for the entry of liquid refrigerant, and the refrigerant outlet 14 is used for the exit of the evaporated refrigerant gas. A tube sheet 2 is fixedly installed behind the refrigerant inlet 13 and the refrigerant outlet 14. The tube sheet 2 has an array of circular mounting holes; inclined grooves are opened on both sides of the tube sheet 2, and heat exchange tubes 4 are fixedly installed on the circular mounting holes of the tube sheet 2; the heat exchange tubes 4 are used for the flow of refrigerant to realize the heat exchange between refrigerant and chilled water, thereby achieving a cooling effect. The tube sheet 2 and the evaporator body 1 form a flow cavity 21, which is used for the flow of liquid refrigerant and evaporated gaseous refrigerant; a partition plate 3 is installed in the flow cavity 21, which is used to determine the refrigerant evaporation process, so that the refrigerant in different working stages is separated from each other, and the evaporated gaseous refrigerant is prevented from contacting the unevaporated liquid refrigerant; a slide rail 31 is fixedly installed on the partition plate 3 to limit the movement trajectory of the flow distribution assembly 5, so that it... The slide rail 31 moves along a fixed direction and has an inclined plate 311 to slow down the refrigerant flow rate and prevent the slide rail 31 from being damaged by impact, thus protecting the slide rail 31. A chilled water inlet 11 and a chilled water outlet 12 are located on the top of the evaporator body 1. The chilled water inlet 11 is located at the front end of the evaporator body 1, and the chilled water outlet 12 is located at the rear end of the evaporator body 1. The chilled water inlet 11 and the chilled water outlet 12 are located on the same side, ensuring complete evaporation of the refrigerant and allowing for full heat exchange between the chilled water and the refrigerant, avoiding any interruptions. The chilled water exchanges heat with the refrigerant, realizing the change of the refrigerant from a liquid to a gaseous state, evaporating and absorbing heat for cooling. The chilled water inlet 11 is equipped with a device to adjust the refrigerant flow rate by changing the chilled water flow rate. The flow distribution component 5 controls the refrigerant flow rate based on the chilled water flow rate, achieving a unified flow rate between chilled water and refrigerant. This ensures the refrigerant fully evaporates and generates heat, preventing excessive refrigerant from causing evaporator frost or insufficient refrigerant from causing excessively low temperatures that could affect food. Simultaneously, it enables macroscopic temperature control, allowing for the injection of appropriate amounts of refrigerant by injecting the corresponding chilled water at the desired temperature, ensuring full evaporation and refrigeration for preservation. A movable component 6 is connected to the flow distribution component 5, which adjusts the heat exchange efficiency by changing the refrigerant flow rate. The movable component 6 is connected to the heat exchange tube 4; by changing its position, the movable component 6 increases the working efficiency of the heat exchange tube 4.

[0035] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the flap 51 has a cylindrical structure with a semi-cylindrical groove at its bottom. A rotating shaft 52 is fixedly connected to the bottom of the flap 51. The diameter of the flap 51 is the same as the inner diameter of the chilled water inlet 11. Circular mounting holes are provided on both sides of the bottom of the chilled water inlet 11. The cylindrical mounting hole on the side closer to the tube sheet 2 is rotatably connected to the rotating shaft 52, and the mounting hole on the other side is rotatably connected to a cylindrical protrusion on one side of the flap 51. The flap 51 is rotatably mounted on the chilled water inlet 11 via the rotating shaft 52 and the cylindrical protrusion. At the bottom of the inlet 11, different chilled water flow rates result in varying impact forces on the flap 51. The rotating shaft 52 is rotatably connected to the tube sheet 2. The tube sheet 2 has a mounting hole at its top, with a diameter matching that of the rotating shaft 52, maintaining the tube sheet 2's airtightness and preventing refrigerant and chilled water leakage through the mounting hole, which would affect evaporator operation. The rotating shaft 52 is fixedly connected to the crank 53 via a mounting hole at one end of the crank 53. The other end of the crank 53 is hinged to one end of the connecting rod 54, and the other end of the connecting rod 54 has a mounting hole... The hole is fixedly connected to the baffle plate 55. A cylindrical protrusion is provided above the rear end of the baffle plate 55. The cylindrical protrusion is connected to the mounting hole on the connecting rod 54. The rotating shaft 52, crank 53, connecting rod 54, and baffle plate 55 constitute the crank 53 slider mechanism, which converts rotational motion into linear motion. The baffle plate 55 has an array of liquid inlet holes, the diameter of which is the same as the diameter of the heat exchange tube 4. The liquid inlet holes of the baffle plate 55 are staggered with the heat exchange tube 4. The baffle plate 55 is connected to the vertical slide rail 3 on the partition plate 3. 1. Sliding connection, the height of the vertical chute 62 is at least the height of one heat exchange tube 4, to avoid the chute 62 being too low and causing the baffle 55 to slide out. The baffle 55 is located behind the refrigerant inlet 13, which can effectively reduce the impact force when the refrigerant enters the flow chamber 21, slow down the refrigerant flow rate, and make the refrigerant flow evenly into the heat exchange tube 4. Push plates are fixedly connected to both sides of the rear end of the baffle 55. The push plates are slidably connected to the tube sheet 2 through the inclined groove opened on the tube sheet 2. The other end of the tube sheet 2 is connected to the moving component 6.

[0036] When the evaporator is working, chilled water flows in through the chilled water inlet 11 at the top of the evaporator. The chilled water impacts the flap 51, causing it to rotate and open the chilled water inlet 11. The more chilled water enters, the greater the impact force on the flap 51, the greater the rotation amplitude of the flap 51, and the wider the opening range of the chilled water inlet 11. As chilled water enters, the flap 51 rotates, and the rotating shaft 52, which is fixedly connected to the flap 51, rotates along with it. The rotating shaft 52 drives the fixedly connected crank 53 to rotate, which in turn drives the connecting rod 54. The connecting rod 54 causes the fixedly connected baffle 55 to slide upward. The circular liquid inlet hole on the baffle 55 begins to misalign with the heat exchange tube 4, opening the heat exchange tube 4. The baffle 55 works in conjunction with the heat exchange tube 4 to control the amount of refrigerant entering, preventing excessive refrigerant from causing frost on the evaporator due to insufficient chilled water, or insufficient refrigerant from causing insufficient evaporation heat exchange and a decrease in cooling temperature. At this time, the refrigerant begins to enter the heat exchange tube 4 evenly, preventing uneven distribution of refrigerant. All of these factors cause the refrigerant in the heat exchange tube 4 to not evaporate completely and accumulate inside the heat exchange tube 4. When the evaporator starts working again, it will affect the subsequent operation. As the flow rate of chilled water increases, the sliding distance of the baffle 55 increases, and the baffle 55 and the heat exchange tube 4 are fully aligned. The heat exchange tube 4 is fully open, the evaporator working efficiency reaches the maximum, and the cooling temperature increases. At the same time, as the baffle 55 slides upward, the baffle 55 drives the push plate fixedly connected to the rear end to move upward together. Under the action of the inclined groove of the tube plate 2, the push plate changes the vertical motion into linear motion, driving the moving component 6 to work. When the evaporator finishes working, the chilled water and refrigerant stop to be supplied to the evaporator. When the chilled water stops being supplied, the flap 51 is no longer subjected to the impact force of the chilled water. The flap 51 quickly reverses and closes the chilled water inlet 11 to prevent the chilled water backflow from damaging the refrigeration system. At this time, the rotating shaft 52 follows the flap 51 to reverse, the baffle 55 slides downward, the heat exchange tube 4 opens and the pipe closes, and the push plate returns to its original position with the baffle 55.

[0037] like Figure 2 , Figure 7 and Figure 8As shown, the drive plate 61 is cylindrical, and its diameter is smaller than the inner wall diameter of the evaporator body 1. The drive plate 61 is located on one side of the chilled water inlet 11. The drive plate 61 has an array of mounting holes that slide to connect with the heat exchange tube 4. The end of the drive plate 61 near the tube sheet 2 is fixedly connected to the push rod 56. The push plate converts its vertical motion into the linear motion of the drive plate 61. A triangular protrusion 611 is provided at the bottom of the drive plate 61, which cooperates with the rectangular groove at the lower end of the drive rod 65. A sliding groove 62 is provided at the front of the drive plate 61 and is fixedly connected to the evaporator body 1. A driven rod 66 is rotatably connected to the middle of the drive rod 65. The drive rod 65 and the driven rod 66 are hinged. The movable rod 65 and the driven rod 66 are fixedly connected at the hinge point to the starting end of the slide 62. A transmission rod 67 is rotatably connected to the front end of the movable rod 65. The movable rod 65 and the transmission rod 67 are hinged together. The hinge point of the movable rod 65 and the transmission rod 67 is located on one side of the slide 62 and is slidably connected to the slide 62. An auxiliary rod 68 is installed between the transmission rod 67 and the driven rod 66. The transmission rod 67 and the driven rod 66 are respectively hinged to the auxiliary rod 68. The hinge point of the driven rod 66 and the auxiliary rod 68 is located on the outside of the slide 62 and is slidably connected to the slide 62. The hinge point of the transmission rod 67 and the auxiliary rod 68 is located inside the slide 62 and is slidably connected to the slide 62. The movable rod 65, the driven rod 66, the transmission rod 67, and the auxiliary rod 68... The structure forms a parallelogram. Through the interaction of the protrusion 611 at the lower end of the drive plate 61, the active rod 65, and the sliding groove 62, the linear motion of the drive plate 61 is converted into the oscillation of the active rod 65. An active baffle 631 is fixedly connected to the hinge point of the transmission rod 67 and the auxiliary rod 68. A driven baffle 632 is located in front of the active baffle 631. The active baffle 631 and the driven baffle 632 are arrayed with mounting holes and slidably connected to the heat exchange tube 4. The active baffle 631 and the driven baffle 632 are arranged alternately, forming a pair, and are fixedly connected by connecting rods 64 on both sides. The active baffle 631 and the driven baffle 632 form a complete circle. The baffle 63 follows the drive rod 65, which drives the transmission rod 67 and the auxiliary rod 68 to slide together along the slide groove 62. At the same time, under the action of the connecting rod 64, the drive baffle 631 drives the driven baffle 632 to slide together. The drive plate 61 and the baffle 63 slide with the heat exchange tube 4, scraping away impurities on the surface of the heat exchange tube 4 to prevent scale from forming and adhering to the heat exchange tube 4, thus hindering the heat exchange efficiency. At the same time, the distance between the drive plate 61 and the baffle 63 decreases, and the pressure on the chilled water at the chilled water inlet 11 increases, and the chilled water flow rate increases. When the chilled water flow rate is larger, the distance between the drive plate 61 and the baffle 63 is smaller, the chilled water is under greater pressure, and the flow rate is faster.

[0038] When the baffle plate 63 slides forward, it drives the push rod 56. With the cooperation of the inclined groove in the tube sheet 2, the push rod 56 pushes the drive plate 61 to slide along the inner wall of the evaporator body 1. The bottom protrusion 611 of the drive plate 61 cooperates with the rear end of the drive rod 65. The drive rod 65 swings, driving the transmission rod 67, driven rod 66, and auxiliary rod 68 to rotate. The drive rod 65 and driven rod 66 drive the hinge point of the transmission rod 67 and auxiliary rod 68 to slide backward along the slide groove 62. The hinge point between the auxiliary rod 68 and the drive baffle 63 drives the active baffle 63 to slide towards the chilled water inlet 11. The active baffle 631 drives the driven baffle 632 to slide together. The drive plate 61 slides relative to the baffle 63 and approaches the chilled water inlet 11 to increase the chilled water flow rate. When the work is finished, the drive plate 61 slides backward, driving the drive rod 65 to reset. The drive rod 65 drives the transmission rod 67 and the auxiliary rod 68 to slide forward along the slide groove 62, and the baffle 63 resets.

[0039] When the ship's cold storage needs cooling, the staff turns on the refrigeration system. Chilled water and refrigerant flow into the evaporator. The refrigerant impacts the baffle plate 55, reducing its flow velocity and causing it to accumulate on the partition plate 3 within the flow chamber 21. Chilled water impacts the flap 51, which drives the rotating shaft 52 fixedly connected to it. The rotating shaft 52 drives the crank 53, which in turn drives the connecting rod 54. The connecting rod 54 causes the baffle plate 55 to slide upward, opening the misalignment between the baffle plate 55 and the heat exchange tube 4. The refrigerant then flows evenly into the heat exchange tube 4. Simultaneously, the upward movement of the baffle plate 55 moves the push plate, which, under the action of the inclined groove in the tube sheet 2, pushes the drive plate 61 forward. The bottom end of the drive plate 61... The protrusion 611 drives the active rod 65 to move, and the active rod 65 drives the transmission rod 67 and the auxiliary rod 68 to slide along the slide groove 62 at the hinge point. The active baffle 631, which is fixedly connected to the hinge point, moves along the slide groove 62 along with the hinge point. The active baffle 631 drives the driven baffle 632 to move together through the connecting rod 64. The distance between the drive plate 61 and the baffle 63 decreases, the chilled water flow rate increases, and the chilled water can react quickly with the refrigerant to fully absorb heat and cool. At the same time, the drive plate 61 and the baffle 63 scrape the outer wall of the heat exchange tube 4 to remove the scale on the surface of the heat exchange tube 4. The scale scraped off by the drive plate 61 and the baffle 63 flows out with the chilled water, keeping the inside of the evaporator clean.

[0040] When the refrigerant has evaporated, the gaseous refrigerant flows through the heat exchange tube 4 and exits from the refrigerant outlet 14 at the front end of the evaporator body 1. The evaporator completes cooling and shuts down the refrigeration system. Chilled water and refrigerant are no longer supplied. At this time, the flap 51 is no longer impacted by the chilled water and quickly reverses to close the chilled water inlet 11, preventing chilled water backflow from damaging the refrigeration system. At the same time, the flap 51 drives the rotating shaft 52 to reverse, and the baffle 55 slides downward, closing the heat exchange tube 4. Simultaneously, the baffle 55 drives the push plate to move downward together. The push plate pulls the drive plate 61 to reset and fit against the tube sheet 2. The protrusion 611 at the bottom of the drive plate 61 drives the active rod 65 to swing. The active rod 65 drives the driven rod 66, the transmission rod 67, and the auxiliary rod 68 to move. The baffle 63, which is fixedly connected to the hinge point of the auxiliary rod 68 and the transmission rod 67, resets. At the same time, the heat exchange tube 4 is scraped to remove surface scale. Cooling ends and the evaporator stops working.

[0041] like Figure 9 As shown, evaporator 1 is connected to the ship's cold storage. By exchanging heat between the low-pressure, low-temperature liquid refrigerant in evaporator 1 and the chilled water, the refrigerant evaporates and absorbs external heat, thereby lowering the temperature inside the cold storage to reach the required preservation and refrigeration temperature for food. The gaseous refrigerant after evaporation enters compressor 7 through refrigerant outlet 14. In compressor 7, it is compressed into a high-temperature, high-pressure gaseous refrigerant. The high-pressure, high-temperature gaseous refrigerant vapor flows into condenser 8, exchanges heat with the cooling water in condenser 8, condenses and releases heat, and condenses into a high-pressure liquid refrigerant that enters expansion valve 9. The high-pressure liquid refrigerant becomes a low-temperature, low-pressure liquid refrigerant after passing through expansion valve 9. The low-temperature, low-pressure liquid refrigerant enters evaporator 1 to continue evaporating and absorbing heat, and the cycle continues.

[0042] The foregoing has shown and described the basic principles and beneficial effects of the present invention. However, the present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its effects and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaporator, comprising an evaporator body (1), a tube sheet (2), a partition plate (3), and heat exchange tubes (4), characterized in that: It also includes a flow divider assembly (5) and a moving assembly (6). The front end of the evaporator body (1) is provided with a refrigerant inlet (13) and a refrigerant outlet (14). A tube sheet (2) is installed behind the refrigerant inlet (13) and the refrigerant outlet (14). A heat exchange tube (4) is fixedly installed on the tube sheet (2). The tube sheet (2) and the evaporator body (1) form a flow chamber (21). A partition plate (3) is installed in the flow chamber (21). A slide rail (31) is provided on the partition plate (3). A chilled water inlet (11) and a chilled water outlet (12) are provided above the evaporator body (1). A flow divider assembly is installed on the chilled water inlet (11) to adjust the refrigerant flow rate by changing the chilled water flow rate. A moving assembly (6) is connected to the flow divider assembly to adjust the heat exchange rate by changing the flow rate. The moving assembly (6) is connected to the heat exchange tube (4). A slide rail (31) is fixedly installed on the partition plate (3) to limit the movement trajectory of the diversion assembly (5) so that it moves in a fixed direction; The diversion assembly includes a flap (51), a rotating shaft (52), a crank (53), a connecting rod (54), a baffle plate (55), and a push rod (56); the flap (51) is connected to a chilled water inlet (11) at the upper end of the evaporator body (1); the flap (51) adjusts its angle by the chilled water flow rate to achieve uniform heat exchange; a device is fixedly installed on the flap (51) to change the position of the baffle plate (55) by converting rotational motion into linear motion. A rotating shaft (52); a crank (53) is mounted on the other end of the rotating shaft (52); the crank (53) is connected to a connecting rod (54); a baffle plate (55) is connected to the other end of the connecting rod (54); the baffle plate (55) is mounted on a partition plate (3); the baffle plate (55) distributes the refrigerant by controlling the flow rate of the chilled water; a push rod (56) is connected to the rear end of the baffle plate (55) to push the moving component (6) by changing the vertical motion to the horizontal motion; The baffle (55) is slidably connected by a vertical slide rail (31) opened on the partition plate (3).

2. An evaporator according to claim 1, characterized in that: The moving component (6) includes a drive plate (61), a chute (62), an active rod (65), a driven rod (66), a transmission rod (67), an auxiliary rod (68), a baffle plate (63), and a connecting rod (64); the drive plate (61) is connected to the diversion component; a chute (62) is provided in front of the drive plate (61); the chute (62) is connected to the active rod (65); a driven rod (66) is connected to the upper middle end and the front end of the active rod (65); a fixed rod is installed between the driven rods (66); a baffle plate (63) is installed on the fixed rod to adjust the heat by changing its own movement range; a connecting rod (64) is installed between the baffle plates (63).

3. An evaporator according to claim 1, characterized in that: The top of the slide rail (31) is provided with an inclined plate (311); the upper end of the inclined plate (311) is flush with the refrigerant inlet (13); the inclined plate (311) changes the refrigerant flow rate to support the slide groove (62).

4. An evaporator according to claim 1, characterized in that: The flap (51) is rotatably installed inside the chilled water inlet (11) pipe; a semi-cylindrical groove is provided at the bottom of the flap (51) and installed with the rotating shaft (52); the flap (51) controls the refrigerant flow by changing the position of the baffle (55) by converting the rotational motion into linear motion.

5. An evaporator according to claim 4, characterized in that: The baffle plate (55) has a semi-circular structure; the baffle plate (55) has liquid inlet holes arranged in an equilateral triangle; the baffle plate (55) changes the diameter of the heat exchange tube (4) by gradually moving.

6. An evaporator according to claim 2, characterized in that: The front end of the drive plate (61) is provided with a right-angled triangular protrusion (611); the protrusion (611) is slidably connected to the active rod (65); the protrusion (611) realizes the left and right swing of the active rod (65) to adjust the position of the baffle plate (63) through its own linear movement.

7. An evaporator according to claim 6, characterized in that: The drive plate (61) and the baffle plate (63) are respectively installed at both ends of the chilled water inlet (11); the drive plate (61) is a cylindrical structure and is in complete contact with the heat exchange tube (4); the drive plate (61) cleans the frost on the surface of the heat exchange tube (4) by moving relative to the baffle plate (63).

8. An evaporator according to claim 7, characterized in that: The baffle plate (63) is not completely circular; the baffle plate (63) is divided into an active baffle plate (631) and a driven baffle plate (632); the active baffle plate (631) and the driven baffle plate (632) are arranged alternately; the active baffle plate (631) and the driven baffle plate (632) are paired together and move synchronously through a connecting rod (64); the baffle plate (63) adjusts the flow rate of the chilled water by changing the distance from the chilled water inlet (11) by horizontal sliding.

9. A ship's cabin refrigeration equipment, characterized in that: The system includes a compressor (7) with an intake port and an exhaust port; a condenser (8) is connected to the exhaust port of the compressor (7); a refrigerant inlet and a refrigerant outlet are provided on the condenser (8); the refrigerant inlet of the condenser (8) is connected to the exhaust port of the compressor (7); the refrigerant outlet of the condenser (8) is connected to an expansion valve (9); the expansion valve (9) has a high-pressure inlet and a low-pressure outlet; the high-pressure inlet of the expansion valve (9) is connected to the refrigerant outlet of the condenser (8); and an evaporator according to any one of claims 1-8, wherein the refrigerant inlet (13) is connected to the low-pressure outlet of the expansion valve (9); the refrigerant outlet (14) is connected to the intake port of the compressor (7); and the evaporator body (1) adjusts the refrigerant injection amount and changes the refrigerant phase by adjusting the injection amount of chilled water.

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