Small LNG (Liquefied Natural Gas) cold energy ice maker

Abstract

The utility model discloses a small-sized LNG (Liquefied Natural Gas) cold energy ice maker, which is characterized in that a heat exchange coil and an ice making mechanism are arranged in an ice making cavity of a shell, and a secondary refrigerant inlet and a secondary refrigerant outlet are formed in the surface of the shell and in a lower cavity; a base is arranged at the bottom of the secondary refrigerant storage tank, the secondary refrigerant storage tank is arranged in the lower cavity of the machine shell through the base, a first low-temperature pump and a second low-temperature pump are arranged on the upper surface of the base, a heat insulation plate is arranged in the secondary refrigerant storage tank, and the interior of the secondary refrigerant storage tank is divided into a left cavity and a right cavity through the heat insulation plate. The ice maker is reasonable in structure, circulation and storage of secondary refrigerants are achieved by arranging the secondary refrigerant storage tank in the ice maker, compared with a traditional compressor type refrigeration structure, the use cost is greatly reduced, meanwhile, LNG cold energy recycling is achieved, energy is saved, energy is saved, and the ice maker is environment-friendly and energy-saving. Therefore, the purposes of energy conservation and emission reduction are achieved, the purpose of cold storage is achieved through storage of the secondary refrigerant storage tank, and safety and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ice-making equipment based on LNG, in particular to a small LNG cold energy ice-making machine. Background Art

[0002] LNG is the abbreviation of liquefied natural gas, whose main component is methane. It is recognized as the cleanest fossil energy on earth. LNG will be accompanied by the release of a large amount of available cold energy during the gasification process. This part of cold energy is usually discarded in the LNG vaporizer, which not only causes a lot of energy waste, but also affects the surrounding environment. Using LNG cold energy to make ice is one of the more common ways. Effective recycling and utilization of LNG cold energy has good economic, social and ecological benefits. Traditional ice makers generally use compressors, condensers, expansion valves and evaporators to form a refrigeration system, but this structure consumes a lot of energy and has high cost of use. Using LNG cold energy to make ice can greatly reduce power consumption and achieve the purpose of energy conservation and emission reduction. At present, some LNG cold energy ice making uses LNG as a refrigerant and adopts traditional ice making system technology for refrigeration. This structure not only has great safety hazards, but also the LNG condensation temperature is very low, which cannot achieve the purpose of saving electricity. Therefore, an improved technology is urgently needed to solve this problem existing in the existing technology. Utility Model Content

[0003] The purpose of the utility model is to provide a small LNG cold energy ice maker, which realizes heat exchange with an ice-making mechanism through LNG cold energy. By arranging a refrigerant storage tank inside the ice maker, the circulation and storage of the refrigerant are realized through the cooperation of a left cavity, a right cavity and a first cryogenic pump and a second cryogenic pump. Compared with a traditional compressor refrigeration structure, the use cost is greatly reduced, and at the same time, the LNG cold energy is recovered and utilized, thereby achieving the purpose of energy saving and emission reduction, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small LNG cold energy ice making machine, comprising a casing and a coolant storage tank;

[0005] A transverse partition is provided inside the casing, and the interior of the casing is divided into an ice-making chamber and a lower chamber by the transverse partition. A heat exchange coil and an ice-making mechanism are provided inside the casing in the ice-making chamber, and the heat exchange coil cooperates with the ice-making mechanism. A water tank is provided on the outside of the casing through a bracket, and a water pump is provided on the upper surface of the water tank. The inlet end of the water pump is connected to a water pumping pipe, and the lower part of the water pumping pipe is provided in the water tank. The outlet end of the water pump is connected to a water outlet pipe, and the end of the water outlet pipe away from the water pump is communicated with the inside of the ice-making mechanism. A coolant inlet and a coolant outlet are provided on the surface of the casing and located in the lower chamber;

[0006] A base is provided at the bottom of the secondary coolant storage tank, and the secondary coolant storage tank is arranged in the lower cavity of the casing through the base. A first cryogenic pump and a second cryogenic pump are provided on the upper surface of the base. A tank cover is provided on the top of the secondary coolant storage tank. An insulation board is provided inside the secondary coolant storage tank, and the interior of the secondary coolant storage tank is divided into a left cavity and a right cavity by the insulation board. Liquid level gauges are provided on both sides of the secondary coolant storage tank. A left lower interface and a left upper interface are provided on the surface of the secondary coolant storage tank and located at the left cavity. A right lower interface and a right upper interface are provided on the surface of the secondary coolant storage tank and located at the right cavity. The left lower interface is connected to the inlet end of the first cryogenic pump through a pipeline, and the left upper interface is connected to the outlet end of the heat exchange coil through a pipeline. The outlet end of the first cryogenic pump is connected to the secondary coolant outlet through a pipeline, and the right upper interface is connected to the secondary coolant inlet through a pipeline. The right lower interface is connected to the inlet end of the second cryogenic pump through a pipeline, and the outlet end of the second cryogenic pump is connected to the inlet end of the heat exchange coil through a pipeline.

[0007] Preferably, the utility model provides a small LNG cold energy ice maker, wherein the casing is provided with a discharge port at the ice making chamber, and the casing is an outer surface and a cover plate is hinged at the discharge port.

[0008] Preferably, the utility model provides a small LNG cold energy ice maker, wherein an inclined plate is provided in the ice making chamber.

[0009] Preferably, the utility model provides a small LNG cold energy ice maker, wherein refrigerant injection ports are provided on the upper surface of the tank cover and located in the left cavity and the right cavity.

[0010] Preferably, the utility model provides a small LNG cold energy ice making machine, wherein liquid level gauges are provided on both sides of the refrigerant storage tank.

[0011] Preferably, the utility model provides a small LNG cold energy ice maker, wherein the casing is provided with side panels on both sides of the lower chamber.

[0012] Preferably, the utility model provides a small LNG cold energy ice maker, wherein a plurality of cylinders are arranged on the outer surface of the casing and on both sides of the water tank, and the piston rods of the cylinders are penetrated through the side walls of the casing.

[0013] Preferably, the utility model provides a small-scale LNG cold energy ice-making machine, wherein the ice-making mechanism includes a fixed plate, a fixed mold and a movable mold, the top of the fixed plate is connected to the inner wall of the ice-making cavity of the casing, the top of the fixed mold is connected to the inner wall of the ice-making cavity of the casing, the fixed mold is provided with a plurality of punches near one end of the fixed plate, the movable mold is provided with a plurality of mold cavities, the mold cavities are connected to each other through through holes, the mold cavities correspond to the punches one by one, connecting plates are provided on both sides of the movable mold and near one end of the fixed plate, the connecting plates are connected to the piston rod of the cylinder, one of the punches is connected to the water outlet pipe and has a water inlet channel running through it.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The ice maker uses LNG cold energy to achieve heat exchange with the ice-making mechanism. A refrigerant storage tank is arranged inside the ice maker, and the circulation and storage of the refrigerant are achieved through the cooperation of the left chamber, the right chamber, the first cryogenic pump and the second cryogenic pump. Compared with the traditional compressor refrigeration structure, the use cost is greatly reduced, and the LNG cold energy is recovered and utilized at the same time, thereby achieving the purpose of energy conservation and emission reduction. In addition, the storage of the refrigerant storage tank achieves the purpose of cold storage, thereby improving safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a side view of the structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the front view structure of the refrigerant storage tank;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the coolant storage tank;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the ice-making mechanism;

[0021] Figure 6 It is a side view structural diagram of the ice making mechanism;

[0022] Figure 7 This is a schematic diagram of the positional relationship between the utility model and the LNG cold energy recovery station.

[0023] In the figure: casing 1, transverse partition 2, ice making chamber 3, lower chamber 4, heat exchange coil 5, ice making mechanism 6, bracket 7, water tank 8, water pump 9, water pumping pipe 10, water outlet pipe 11, coolant inlet 12, coolant outlet 13, coolant storage tank 14, base 15, first cryogenic pump 16, second cryogenic pump 17, tank cover 18, insulation board 19, left chamber 20, right chamber 21, liquid level gauge 22, left lower interface 23, left upper interface 24, right lower interface 25, right upper interface 26, discharge port 27, cover plate 28, inclined plate 29, coolant injection port 30, side plate 31, cylinder 32, fixed plate 601, fixed mold 602, movable mold 603, punch 604, mold cavity 605, connecting plate 606, water inlet channel 607. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model;

[0025] It should be noted that, in the description of the present invention, the terms "inside", "outside", "upper", "lower", "both sides", "one end", "the other end", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] See also Figure 1-4 , the utility model provides a technical solution: a small LNG cold energy ice making machine, including a casing 1 and a coolant storage tank 14;

[0027] A partition 2 is provided inside the casing 1, and the inside of the casing 1 is divided into an ice-making chamber 3 and a lower chamber 4 by the partition 2. The casing 1 is provided with a discharge port 27 at the ice-making chamber 3. The casing 1 is an outer surface and a cover plate 28 is hinged at the discharge port 27. Ice cubes are taken out through the discharge port 27. The cover plate 28 ensures that dust does not enter the ice-making chamber 3. An inclined plate 29 is provided in the ice-making chamber 3 to facilitate the demoulded ice cubes to slide smoothly into the ice-making chamber 3 near the discharge port 27, so as to facilitate the material removal. The casing 1 is provided with side plates 31 on both sides of the lower chamber 4 to realize the installation, disassembly, repair and maintenance of the coolant storage tank 14. The casing 1 is provided with a Heat exchange coil 5 and ice making mechanism 6, heat exchange coil 5 cooperates with ice making mechanism 6, a water tank 8 is arranged on the outside of casing 1 through bracket 7, a plurality of cylinders 32 are arranged on the outer surface of casing 1 and on both sides of water tank 8, piston rods of cylinders 32 are penetrated through the side wall of casing 1 to cooperate with ice making mechanism 6, a water pump 9 is arranged on the upper surface of water tank 8, the inlet end of water pump 9 is connected with water pumping pipe 10, the lower part of water pumping pipe 10 is arranged in water tank 8, the outlet end of water pump 9 is connected with water outlet pipe 11, the end of water outlet pipe 11 away from water pump 9 is communicated with the inside of ice making mechanism 6, a coolant inlet 12 and a coolant outlet 13 are arranged on the surface of casing 1 and located at lower chamber 4;

[0028] A base 15 is provided at the bottom of the coolant storage tank 14, and the coolant storage tank 14 is arranged in the lower chamber 4 of the casing 1 through the base 15. A first cryogenic pump 16 and a second cryogenic pump 17 are provided on the upper surface of the base 15. A tank cover 18 is provided at the top of the coolant storage tank 14. An insulation board 19 is provided inside the coolant storage tank 14. The inside of the coolant storage tank 14 is divided into a left chamber 20 and a right chamber 21 by the insulation board 19. A coolant injection port 30 is provided on the upper surface of the tank cover 18 and located at the left chamber 20 and the right chamber 21 to facilitate the replenishment of the coolant. Liquid level gauges 22 are provided on both sides of the coolant storage tank 14. The surface of the coolant storage tank 14 and located at the left chamber 2 A left lower interface 23 and a left upper interface 24 are provided at 0, and a right lower interface 25 and a right upper interface 26 are provided on the surface of the refrigerant storage tank 14 and located at the right cavity 21. The left lower interface 23 is connected to the inlet end of the first cryogenic pump 16 through a pipeline, the left upper interface 24 is connected to the outlet end of the heat exchange coil 5 through a pipeline, the outlet end of the first cryogenic pump 16 is connected to the refrigerant outlet 13 through a pipeline, the right upper interface 26 is connected to the refrigerant inlet 12 through a pipeline, the right lower interface 25 is connected to the inlet end of the second cryogenic pump 17 through a pipeline, and the outlet end of the second cryogenic pump 17 is connected to the inlet end of the heat exchange coil 5 through a pipeline.

[0029] like Figure 5-6As shown, the ice-making mechanism 6 includes a fixed plate 601, a fixed mold 602 and a movable mold 603. The top of the fixed plate 601 is connected to the inner wall of the ice-making cavity 3 of the casing 1, and the top of the fixed mold 602 is connected to the inner wall of the ice-making cavity 3 of the casing 1. The fixed mold 602 is provided with a plurality of punches 604 at one end close to the fixed plate 601. The movable mold 603 is provided with a plurality of mold cavities 605, and the mold cavities 605 are interconnected through through holes. The mold cavities 605 correspond to the punches 604 one by one. Connecting plates 606 are provided on both sides of the movable mold 603 and close to one end of the fixed plate 601. The connecting plates 606 are connected to the piston rod of the cylinder 32. One of the punches 604 is connected to the water outlet pipe 11 and has a water inlet channel 607 running through it.

[0030] Installation method and operating principle: first install the heat exchange coil 5 on the back of the fixing plate 601, then install the fixing plate 601 in the refrigeration chamber of the casing 1, then install the water tank 8 on the bracket 7, and then install the water pump 9 on the upper surface of the water tank 8, and at the same time connect the inlet end of the water pump 9 to the water suction pipe 10, and the outlet end of the water pump 9 is connected to the inside of the punch 604 of the ice-making mechanism 6 through the water outlet pipe 11. The first cryogenic pump 16 and the second cryogenic pump 17 are installed on the base 15, and the inlet end of the first cryogenic pump 16 is connected to the left lower interface 23 of the coolant storage tank 14 through a pipeline, and the inlet end of the second cryogenic pump 17 is connected to the right lower interface 25 of the coolant storage tank 14 through a pipeline. Then, the coolant storage tank 14 is installed in the lower cavity 4 inside the casing 1 through the base 15, and then the outlet end of the first cryogenic pump 16 is connected to the coolant outlet 13 through a pipeline, and the outlet end of the second cryogenic pump 17 is connected to the inlet end of the heat exchange coil 5 through a pipeline. Finally, the left upper interface 24 of the coolant storage tank 14 is connected to the outlet end of the heat exchange coil 5 through a pipeline, and the right upper interface 26 of the coolant storage tank 14 is connected to the coolant inlet 12 through a pipeline to complete the installation. When in use, the refrigerant (-40°C) after heat exchange with LNG enters from the refrigerant inlet 12, enters the right cavity 21 of the refrigerant storage tank 14 through the upper right interface 26, and then introduces the refrigerant into the coil of the heat exchange coil 5 from the lower right interface 25 through the second cryogenic pump 17. The coil exchanges heat with the fixed plate 601. The refrigerant after heat exchange returns to the left cavity 20 of the refrigerant storage tank 14 from the upper left interface 24, and then returns to the LNG cold energy recovery station from the refrigerant outlet 13 through the lower left interface 23 and the first cryogenic pump 16. Figure 7When making ice, the telescopic rod of the cylinder 32 is retracted, so that the movable mold 603 is pressed against the outer surface of the fixed plate 601, so that the mold cavity 605 of the movable mold 603 is sealed, and the water in the water tank 8 is pumped into the mold cavity 605 of the movable mold 603 through the water pump 9 from the water inlet channel 607 of the corresponding punch 604 until all the mold cavities 605 are filled. Through heat exchange with the heat exchange coil 5, the water is frozen into ice cubes. When discharging, the piston rod of the cylinder 32 is pushed outward, the ice cubes remain in place, and the movable mold 603 approaches the fixed mold 602, so that all the ice cubes fall off to the inclined plate 29, and finally the cover plate 28 is opened to take out the ice cubes. The utility model has a reasonable structure. The ice-making machine realizes heat exchange with the ice-making mechanism 6 through LNG cold energy. By arranging a refrigerant storage tank 14 inside the ice-making machine, the circulation and storage of the refrigerant are realized through the cooperation of the left chamber 20, the right chamber 21 and the first cryogenic pump 16 and the second cryogenic pump 17. Compared with the traditional compressor refrigeration structure, the use cost is greatly reduced, and the LNG cold energy is recovered and utilized, thereby achieving the purpose of energy saving and emission reduction. In addition, the storage of the refrigerant storage tank can achieve the purpose of cold storage, thereby improving safety and stability.

[0031] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0032] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A small LNG cold energy ice making machine, characterized by: It comprises a casing (1) and a coolant storage tank (14); The casing (1) is provided with a transverse partition (2) inside, and the casing (1) is divided into an ice-making chamber (3) and a lower chamber (4) by the transverse partition (2). The casing (1) is provided with a heat exchange coil (5) and an ice-making mechanism (6) inside the ice-making chamber (3), and the heat exchange coil (5) cooperates with the ice-making mechanism (6). The casing (1) is provided with a water tank (8) on the outside through a bracket (7), and the upper surface of the water tank (8) is provided with A water pump (9), wherein the inlet end of the water pump (9) is connected to a water pumping pipe (10), the lower part of the water pumping pipe (10) is arranged in the water tank (8), the outlet end of the water pump (9) is connected to a water outlet pipe (11), the end of the water outlet pipe (11) away from the water pump (9) is connected to the inside of the ice-making mechanism (6), and a coolant inlet (12) and a coolant outlet (13) are arranged on the surface of the casing (1) and located at the lower chamber (4); A base (15) is provided at the bottom of the coolant storage tank (14), and the coolant storage tank (14) is arranged in the lower chamber (4) of the casing (1) through the base (15). A first cryogenic pump (16) and a second cryogenic pump (17) are provided on the upper surface of the base (15). A tank cover (18) is provided at the top of the coolant storage tank (14). A temperature insulation board (19) is provided inside the coolant storage tank (14), and the inside of the coolant storage tank (14) is divided into a left chamber (20) and a right chamber (21) by the temperature insulation board (19). Liquid level gauges (22) are provided on both sides of the coolant storage tank (14), and a left lower interface (23) and a left upper interface (21) are provided on the surface of the coolant storage tank (14) and located at the left chamber (20). The surface of the refrigerant storage tank (14) is provided with a right lower interface (25) and a right upper interface (26) located at the right cavity (21); the left lower interface (23) is connected to the inlet end of the first cryogenic pump (16) through a pipeline; the left upper interface (24) is connected to the outlet end of the heat exchange coil (5) through a pipeline; the outlet end of the first cryogenic pump (16) is connected to the refrigerant outlet (13) through a pipeline; the right upper interface (26) is connected to the refrigerant inlet (12) through a pipeline; the right lower interface (25) is connected to the inlet end of the second cryogenic pump (17) through a pipeline; and the outlet end of the second cryogenic pump (17) is connected to the inlet end of the heat exchange coil (5) through a pipeline.

2. A small LNG cold energy ice making machine according to claim 1, characterized in that: The casing (1) is provided with a discharge port (27) located in the ice-making chamber (3), and the casing (1) is an outer surface and is hinged with a cover plate (28) located at the discharge port (27).

3. A small LNG cold energy ice making machine according to claim 1, characterized in that: An inclined plate (29) is arranged in the ice making chamber (3).

4. A small LNG cold energy ice making machine according to claim 1, characterized in that: A coolant injection port (30) is provided on the upper surface of the tank cover (18) and located at the left chamber (20) and the right chamber (21).

5. A small LNG cold energy ice making machine according to claim 1, characterized in that: The housing (1) is provided with side panels (31) on both sides of the lower chamber (4).

6. A small LNG cold energy ice making machine according to claim 1, characterized in that: A plurality of cylinders (32) are arranged on the outer surface of the casing (1) and on both sides of the water tank (8), and piston rods of the cylinders (32) are inserted through the side walls of the casing (1).

7. A small LNG cold energy ice making machine according to claim 1, characterized in that: The ice-making mechanism (6) comprises a fixed plate (601), a fixed mold (602) and a movable mold (603); the top of the fixed plate (601) is connected to the inner wall of the ice-making chamber (3) of the casing (1); the top of the fixed mold (602) is connected to the inner wall of the ice-making chamber (3) of the casing (1); a plurality of convex molds (604) are arranged at one end of the fixed mold (602) close to the fixed plate (601); and a plurality of convex molds (604) are arranged through the movable mold (603). The mold cavities (605) are interconnected through through holes, the mold cavities (605) correspond to the punches (604) one by one, connecting plates (606) are provided on both sides of the movable mold (603) and close to one end of the fixed plate (601), the connecting plates (606) are connected to the piston rod of the cylinder (32), one of the punches (604) is connected to the water outlet pipe (11) and has a water inlet channel (607) running through it.

Images