Defrosting mechanism for evaporator

Abstract

The utility model relates to an evaporator, and in particular to a defrosting mechanism of an evaporator, comprising a mounting plate, two mounting plates are provided, and a plurality of evenly distributed evaporation tubes are installed between the two mounting plates, the plurality of evaporation tubes are connected through a bend pipe, a sliding rod is fixedly connected to the left side between the two mounting plates, a screw rod is rotatably connected to the right side between the two mounting plates, the outer walls of the sliding rod and the screw rod are movably connected to movable blocks, two connecting rods are fixedly connected to the opposite sides of the two movable blocks, and a scraper is fixedly connected between the two connecting rods on the same side in the front and rear directions. The utility model can scrape off the frost on the surface walls of a plurality of evaporation tubes, and two scrapers are provided, which can work simultaneously from the front and rear sides of the evaporation tube, so that the defrosting is more thorough, and the defrosting effect and efficiency are improved; and the transmission method of the scraper saves space and has high integration, so that the installation of the evaporator is more convenient.

Description

Technical Field

[0001] The utility model relates to an evaporator, in particular to a defrosting mechanism of the evaporator. Background Art

[0002] Evaporators used in cold storage, process cold air and other places with an outlet temperature below 0°C will frost on the surface of the coil during operation. When the frost layer reaches a certain thickness, it will seriously affect the heat exchange efficiency of the evaporator. Electric heating, hot fluorine, hot ammonia and water spraying are generally used to frost the evaporator. When defrosting, the system needs to stop the refrigeration operation, which will cause the controlled temperature to fluctuate, reduce the working stability and efficiency of the system, and when the application and process requirements do not allow intermittent refrigeration, only spare equipment can be added, which increases the cost;

[0003] After searching, the patent with publication number CN201688635U discloses a defrosting mechanism for an evaporator. The device adopts a scraper mechanical defrosting, which can meet the system's uninterrupted refrigeration requirements, improve the system's working stability and work efficiency, has a simple structure, saves energy, has low configuration and use costs, and has a good defrosting effect.

[0004] However, when the above mechanism is working, the scraper is driven to move by the installed cylinder. The cylinder is installed to protrude outward, which takes up space and makes the evaporator inconvenient to install. At the same time, only one side of the surface of the evaporator tube can be defrosted, and the defrosting effect is not good. In addition, the defrosting efficiency is low because of the simple scraper structure. Summary of the invention

[0005] The utility model aims to provide a defrosting mechanism for an evaporator, which can make defrosting more thorough, improve the defrosting effect and efficiency, and make the installation of the evaporator more convenient.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a defrosting mechanism for an evaporator, comprising a mounting plate, two mounting plates are provided, and a plurality of evenly distributed evaporation tubes are installed between the two mounting plates, the plurality of evaporation tubes are connected through a bend pipe, a sliding rod is fixedly connected to the left side between the two mounting plates, a screw rod is rotatably connected to the right side between the two mounting plates, the outer walls of the sliding rod and the screw rod are movably connected to movable blocks, two connecting rods are fixedly connected to the opposite sides of the two movable blocks, and a scraper is fixedly connected between the two connecting rods located on the same side in the front-rear direction;

[0007] Vertical plates are fixedly connected to the left and right sides of the lower mounting plate, and the bottom ends of the two vertical plates are fixedly connected to a base plate. A fan and an air heater are installed at the bottom of the base plate. A through pipe is arranged above the base plate, and the outer wall of the through pipe is connected to multiple air injection pipes.

[0008] In order to facilitate the spraying of hot air between the evaporation tubes, as a preferred defrosting mechanism of an evaporator of the utility model, the air heater and the through-tube are connected by a pipeline, and the fan and the air heater are connected by a pipeline.

[0009] In order to improve the defrosting efficiency, as a preferred defrosting mechanism of an evaporator of the utility model, the plurality of air jet pipes all penetrate the lower mounting plate and extend between the plurality of evaporation tubes.

[0010] In order to defrost the surface wall of the evaporator tube, as a preferred defrosting mechanism of an evaporator of the utility model, the two scrapers are provided with a plurality of arc-shaped grooves matching the evaporator tube on opposite sides.

[0011] In order to improve the scraping effect, as a preferred defrosting mechanism of an evaporator of the utility model, a rubber pad is fixedly connected to the inner wall of the groove.

[0012] In order to drive the screw to rotate, as a preferred defrosting mechanism of an evaporator of the utility model, a motor is installed on the outer wall of the upper mounting plate, and the output end of the motor is fixedly connected to the screw.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] When the utility model is used, the fan and the air heater are first started, and the fan introduces the hot air heated by the air heater into the interior of the through pipe, and then sprays it between the multiple evaporator tubes through multiple air spray pipes, thereby accelerating the melting of frost on the surface walls of the multiple evaporator tubes and reducing the viscosity between the frost and the surface walls of the evaporator tubes. Then the motor is started, and the output end of the motor drives the screw rod to rotate, and the screw rod drives the movable block of the outer wall to move up and down, thereby driving the two scrapers to move upward, and the outer wall of the scraper is provided with a groove, which can defrost the surface walls of the multiple evaporator tubes; and two scrapers are provided, which can work simultaneously from the front and back sides of the evaporator tube, so that the defrosting is more thorough, and the defrosting effect and efficiency are improved; and the transmission method of the scraper saves space and has high integration, so that the evaporator is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a front view structural schematic diagram of the utility model;

[0017] Figure 2It is a partial top view structural schematic diagram of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point a in the middle.

[0019] In the figure: 1. mounting plate; 2. evaporating tube; 3. sliding rod; 4. screw rod; 5. movable block; 6. connecting rod; 7. scraper; 8. vertical plate; 9. bottom plate; 10. fan; 11. air heater; 12. through pipe; 13. air spray pipe; 14. groove; 15. rubber pad; 16. motor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] See also Figures 1 to 3 , a defrosting mechanism for an evaporator, comprising a mounting plate 1, two mounting plates 1 are provided, and a plurality of evenly distributed evaporation tubes 2 are installed between the two mounting plates 1, the plurality of evaporation tubes 2 are connected through a bend pipe, a sliding rod 3 is fixedly connected to the left side between the two mounting plates 1, a screw rod 4 is rotatably connected to the right side between the two mounting plates 1, movable blocks 5 are movably connected to the outer walls of the sliding rod 3 and the screw rod 4, two connecting rods 6 are fixedly connected to the opposite sides of the two movable blocks 5, and a scraper 7 is fixedly connected between the two connecting rods 6 located on the same side in the front-rear direction;

[0023] Vertical plates 8 are fixedly connected to the left and right sides of the lower mounting plate 1, and the bottom ends of the two vertical plates 8 are fixedly connected to a base plate 9. A fan 10 and an air heater 11 are installed at the bottom of the base plate 9. A through pipe 12 is arranged above the base plate 9, and the outer wall of the through pipe 12 is connected to multiple air injection pipes 13.

[0024] In this embodiment: when the utility model is used, the fan 10 and the air heater 11 are first started, and the fan 10 introduces the hot air heated by the air heater 11 into the interior of the through pipe 12, and then sprays it between the multiple evaporation tubes 2 through the multiple air spray pipes 13, so that the frost on the surface walls of the multiple evaporation tubes 2 is accelerated to melt, and the viscosity between the frost and the surface walls of the evaporation tubes 2 is reduced, and then the motor 16 is started, and the output end of the motor 16 drives the screw rod 4 to rotate, and the screw rod 4 drives the movable block 5 of the outer wall to move up and down, thereby driving the two scrapers 7 to move upward, and the outer wall of the scraper 7 is provided with a groove 14, which can defrost the surface walls of the multiple evaporation tubes 2; and there are two scrapers 7, which can work simultaneously from the front and back sides of the evaporation tube 2, and the defrosting is more thorough, thereby improving the defrosting effect and efficiency; and the transmission method of the scraper 7 saves space and has high integration, so that the evaporator is more convenient to install.

[0025] As a technical optimization solution of the utility model, the air heater 11 and the through pipe 12 are connected through a pipeline, and the fan 10 and the air heater 11 are connected through a pipeline.

[0026] In this embodiment, the fan 10 and the air heater 11 are connected via a pipeline, so that the hot air can be introduced into the through pipe 12.

[0027] As a technical optimization solution of the present invention, the plurality of air injection pipes 13 all penetrate the lower mounting plate 1 and extend between the plurality of evaporation tubes 2 .

[0028] In this embodiment: multiple air injection pipes 13 all penetrate the lower mounting plate 1 and extend between multiple evaporation tubes 2, so as to accelerate the melting of frost on the surface of multiple evaporation tubes 2, reduce the viscosity between frost and the surface of evaporation tubes 2, and make defrosting easier.

[0029] As a technical optimization solution of the utility model, a plurality of arc-shaped grooves 14 matching the evaporation tubes 2 are provided on opposite sides of the two scrapers 7 .

[0030] In this embodiment, the groove 14 matches the evaporation tube 2 and is in an arc shape, and can be closely attached to the surface wall of the evaporation tube 2, thereby improving the defrosting effect.

[0031] As a technical optimization solution of the present invention, a rubber pad 15 is fixedly connected to the inner wall of the groove 14 .

[0032] In this embodiment, the inner wall of the groove 14 is fixedly connected with a rubber pad 15 , which has good plasticity and elasticity, can better contact with the surface of the evaporation tube 2 , and has good wear resistance, thereby extending the service life.

[0033] As a technical optimization solution of the present invention, a motor 16 is installed on the outer wall of the upper mounting plate 1 , and the output end of the motor 16 is fixedly connected to the screw rod 4 .

[0034] In this embodiment: the output end of the motor 16 is fixedly connected to the screw rod 4, and can drive the screw rod 4 to rotate.

[0035] Working principle: When the utility model is used, the fan 10 and the air heater 11 are first started, and the fan 10 guides the hot air heated by the air heater 11 into the interior of the through pipe 12, and then sprays it between the multiple evaporation tubes 2 through multiple air spray pipes 13, thereby accelerating the melting of the frost on the surface walls of the multiple evaporation tubes 2 and reducing the viscosity between the frost and the surface walls of the evaporation tubes 2. Then the motor 16 is started, and the output end of the motor 16 drives the screw rod 4 to rotate, and the screw rod 4 drives the movable block 5 of the outer wall to move up and down, thereby driving the two scrapers 7 to move upward, and the outer wall of the scraper 7 is provided with a groove 14, which can defrost the surface walls of the multiple evaporation tubes 2; and two scrapers 7 are provided, which can work simultaneously from the front and back sides of the evaporation tube 2, so that the defrosting is more thorough, and the defrosting effect and efficiency are improved.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A defrosting mechanism for an evaporator, comprising a mounting plate (1), characterized in that: Two mounting plates (1) are provided, and a plurality of evenly distributed evaporation tubes (2) are mounted between the two mounting plates (1); the plurality of evaporation tubes (2) are connected to each other via a bent tube; a sliding rod (3) is fixedly connected to the left side between the two mounting plates (1); a screw rod (4) is rotatably connected to the right side between the two mounting plates (1); movable blocks (5) are movably connected to the outer walls of the sliding rod (3) and the screw rod (4); two connecting rods (6) are fixedly connected to opposite sides of the two movable blocks (5); and a scraper (7) is fixedly connected between the two connecting rods (6) located on the same side in the front-rear direction; The left and right sides of the lower mounting plate (1) are fixedly connected to vertical plates (8), the bottom ends of the two vertical plates (8) are fixedly connected to a bottom plate (9), a fan (10) and an air heater (11) are installed at the bottom of the bottom plate (9), a through pipe (12) is arranged above the bottom plate (9), and the outer wall of the through pipe (12) is connected to a plurality of air injection pipes (13).

2. The defrosting mechanism of an evaporator according to claim 1, characterized in that: The air heater (11) and the through pipe (12) are connected via a pipeline, and the fan (10) and the air heater (11) are connected via a pipeline.

3. The defrosting mechanism of an evaporator according to claim 1, characterized in that: The plurality of air injection pipes (13) all penetrate the lower mounting plate (1) and extend between the plurality of evaporation pipes (2).

4. The defrosting mechanism of an evaporator according to claim 1, characterized in that: A plurality of arc-shaped grooves (14) matching the evaporation tube (2) are provided on opposite sides of the two scrapers (7).

5. The defrosting mechanism of an evaporator according to claim 4, characterized in that: A rubber pad (15) is fixedly connected to the inner wall of the groove (14).

6. The defrosting mechanism of an evaporator according to claim 1, characterized in that: A motor (16) is installed on the outer wall of the upper mounting plate (1), and an output end of the motor (16) is fixedly connected to the screw rod (4).

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