LNG (Liquefied Natural Gas) cold energy recovery ice-making device

Abstract

The utility model discloses a liquefied natural gas (LNG) cold energy recovery ice-making device, a refrigeration mechanism and an LNG heat exchange mechanism are arranged in an ice-making machine shell, and a heat exchange coil pipe is communicated with a passage of the LNG heat exchange mechanism through a first three-way valve and a second three-way valve. And the two three-way valves are further connected with the LNG heat exchange mechanism, when LNG cold energy refrigeration is conducted, the refrigeration mechanism channel is closed, the heat exchange coil communicates with the LNG heat exchange mechanism, and therefore heat exchange ice making through LNG cold energy is achieved, reutilization of the LNG cold energy is achieved, the energy consumption cost is saved, and energy is saved and carbon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG cold energy recovery and utilization, in particular to an LNG cold energy recovery ice-making device. Background Art

[0002] Ice maker is a refrigeration mechanical equipment that generates ice by cooling water through the evaporator with the refrigerant of the refrigeration system. It uses the refrigeration system and water as a carrier to make ice by passing through a certain device under power-on state. The shape of the ice cubes generated is different according to the principle and production method of the evaporator. People generally classify ice makers into granular ice machines, flake ice machines, plate ice machines, tube ice machines, shell ice machines, etc. according to the shape of ice.

[0003] Liquefied natural gas has gradually become an important strategic reserve energy source due to its advantages such as cleanliness and environmental protection. In industrial production, a large amount of electricity is consumed to liquefy natural gas into a low-temperature liquid mixture of -162°C. With the continuous development of the LNG industry, more and more companies and research institutions have begun to pay attention to the reuse of LNG cold energy. The use of LNG cold energy not only saves energy and protects the environment, but also can produce considerable economic benefits and good social benefits. However, traditional ice-making equipment completely uses electricity to work, resulting in high energy consumption and is not conducive to energy saving. If it can be combined with LNG cold energy, the purpose of energy saving and emission reduction can be achieved. Therefore, an improved technology is urgently needed to solve this problem existing in the existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide an LNG cold energy recovery ice-making device. In addition to the traditional refrigeration mechanism, the ice maker is also connected to the LNG heat exchange mechanism through two three-way valves. When LNG cold energy refrigeration is performed, the refrigeration mechanism passage is closed, and the heat exchange coil is connected to the LNG heat exchange mechanism, thereby realizing LNG cold energy for heat exchange and ice making, realizing the reuse of LNG cold energy, saving energy costs, and reducing energy and carbon emissions, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an LNG cold energy recovery ice-making device, comprising an ice-making mechanism, a refrigeration mechanism and an LNG heat exchange mechanism;

[0006] The ice-making mechanism comprises an ice-making machine housing, a partition is arranged inside the ice-making machine housing, an ice-making chamber and a device installation chamber are arranged inside the ice-making machine housing through the partition, a return water tank is arranged inside the ice-making machine housing and below the partition, an inclined plate is arranged inside the ice-making chamber, an ice-making box is arranged outside the inclined plate, an ice-making groove is arranged inside the ice-making box, the ice-making grooves are connected to each other, a water inlet is arranged at one end of the ice-making box, cylinders are arranged on both sides of the upper surface of the inclined plate, a piston rod of the cylinder passes through the inclined plate and is connected to a baffle, the baffle is movably arranged outside the ice-making box, a bracket is arranged on the upper part of the device installation chamber, and an LNG inlet quick connector and an LNG outlet quick connector are respectively arranged on one side of the ice-making machine housing;

[0007] The refrigeration mechanism includes a compressor, a condenser, a first liquid storage tank, an expansion valve and a heat exchange coil, the heat exchange coil is attached to the upper surface of the ice box, the two ends of the heat exchange coil are respectively connected to the first three-way valve and the second three-way valve, the compressor is arranged inside the ice maker shell, the condenser is arranged on the back plate of the ice maker shell, the back plate of the ice maker shell and the condenser are provided with exhaust louvers, the first liquid storage tank and the expansion valve are arranged on the upper surface of the bracket, the outlet end of the compressor is connected to the inlet end of the condenser, the outlet end of the condenser is connected to the inlet end of the first liquid storage tank, the outlet end of the first liquid storage tank is connected to the inlet end of the expansion valve, the outlet end of the expansion valve is connected to the first three-way valve, and the second three-way valve is also connected to the inlet end of the compressor;

[0008] The LNG heat exchange mechanism includes a tubular heat exchanger, a refrigerant pump, and a second liquid storage tank. The tubular heat exchanger, the refrigerant pump and the second liquid storage tank are all arranged in the ice maker shell. The refrigerant outlet end of the tubular heat exchanger is connected to the inlet end of the second liquid storage tank, the outlet end of the second liquid storage tank is connected to the inlet end of the refrigerant pump, the outlet end of the refrigerant pump is connected to the first three-way valve, and the refrigerant inlet end of the tubular heat exchanger is connected to the second three-way valve. The upper surface of the tubular heat exchanger is provided with an LNG inlet, and the lower surface of the tubular heat exchanger is provided with an LNG outlet. The LNG inlet is connected to the LNG inlet quick connector on the side wall of the ice maker shell through a pipeline, and the LNG outlet is connected to the LNG outlet quick connector on the side wall of the ice maker shell through a pipeline.

[0009] Preferably, the utility model provides an LNG cold energy recovery ice-making device, wherein a drainage hole is provided at the bottom of the partition, and a return water port is provided at the bottom of the return water tank.

[0010] Preferably, the utility model provides an LNG cold energy recovery ice-making device, wherein the ice-making machine housing is arranged to be open at the ice-making chamber.

[0011] Preferably, the utility model provides an LNG cold energy recovery ice-making device, wherein inspection doors are provided on the sides of the ice-making machine housing and located at the ice-making chamber and the device installation chamber.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In addition to the traditional refrigeration mechanism inside the ice maker, it is also connected to the LNG heat exchange mechanism through two three-way valves. When LNG cold energy is used for cooling, the refrigeration mechanism passage is closed and the heat exchange coil is connected to the LNG heat exchange mechanism, thereby realizing the heat exchange and ice making of LNG cold energy, realizing the reuse of LNG cold energy, saving energy costs, and reducing energy and carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the appearance structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the heat exchange coil structure;

[0017] Figure 4 It is a schematic diagram of the ice box structure.

[0018] In the figure: ice maker housing 1, partition 2, ice making chamber 3, device installation chamber 4, return water tank 5, inclined plate 6, ice making box 7, ice making trough 8, water inlet 9, cylinder 10, baffle 11, bracket 12, LNG inlet quick connector 13, LNG outlet quick connector 14, compressor 15, condenser 16, first liquid storage tank 17, expansion valve 18, heat exchange coil 19, first three-way valve 20, second three-way valve 21, exhaust louver 22, tubular heat exchanger 23, refrigerant pump 24, second liquid storage tank 25, LNG inlet 26, LNG outlet 27, drain hole 28, return water port 29, open port 30, inspection door 31. DETAILED DESCRIPTION

[0019] 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;

[0020] 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.

[0021] See also Figure 1-4 , the utility model provides a technical solution: an LNG cold energy recovery ice-making device, including an ice-making mechanism, a refrigeration mechanism and an LNG heat exchange mechanism;

[0022] The ice-making mechanism comprises an ice-making machine housing 1, a partition 2 is arranged inside the ice-making machine housing 1, an ice-making chamber 3 and a device installation chamber 4 are arranged inside the ice-making machine housing 1 through the partition 2, a return water tank 5 is arranged inside the ice-making machine housing 1 and below the partition 2, a drainage hole 28 is opened at the bottom of the partition 2 to enable melted water to flow from the drainage hole 28 into the return water tank, a return water port 29 is arranged at the bottom of the return water tank 5 to be connected to an external pump and flow back to the external water outlet tank, an inclined plate 6 is arranged inside the ice-making chamber 3, an ice-making box 7 is arranged outside the inclined plate 6, an ice-making groove 8 is arranged inside the ice-making box 7, and the ice-making grooves 8 are connected to each other, so that ice-making A water inlet 9 is provided at one end of the box 7, cylinders 10 are provided on both sides of the upper surface of the inclined plate 6, the piston rod of the cylinder 10 passes through the inclined plate 6 and is connected to the baffle 11, the baffle 11 is movably provided on the outside of the ice box 7, a bracket 12 is provided on the upper part of the device installation cavity 4, an LNG inlet quick connector 13 and an LNG outlet quick connector 14 are provided on one side of the ice machine housing 1, the ice machine housing 1 is located at the ice making cavity 3 and is set to an open 30 to achieve ice taking, and an inspection door 31 is provided on the side of the ice machine housing 1 and located at the ice making cavity 3 and the device installation cavity 4, so as to facilitate the inspection of the devices inside the ice machine housing 1 after opening;

[0023] The refrigeration mechanism includes a compressor 15, a condenser 16, a first liquid storage tank 17, an expansion valve 18 and a heat exchange coil 19. The heat exchange coil 19 is attached to the upper surface of the ice box 7. The two ends of the heat exchange coil 19 are respectively connected to the first three-way valve 20 and the second three-way valve 21. The compressor 15 is arranged inside the ice machine housing 1. The condenser 16 is arranged on the back plate of the ice machine housing 1. The back plate of the ice machine housing 1 and the condenser 16 are provided with exhaust louvers 22. The first liquid storage tank 17 and the expansion valve 18 are arranged on the upper surface of the bracket 12. The outlet end of the compressor 15 is connected to the inlet end of the condenser 16, the outlet end of the condenser 16 is connected to the inlet end of the first liquid storage tank 17, the outlet end of the first liquid storage tank 17 is connected to the inlet end of the expansion valve 18, the outlet end of the expansion valve 18 is connected to the first three-way valve 20, and the second three-way valve 21 is also connected to the inlet end of the compressor 15.

[0024] The LNG heat exchange mechanism includes a tubular heat exchanger 23, a refrigerant pump 24, and a second liquid storage tank 25. The tubular heat exchanger 23, the refrigerant pump 24 and the second liquid storage tank 25 are all arranged in the ice maker shell 1. The refrigerant outlet end of the tubular heat exchanger 23 is connected to the inlet end of the second liquid storage tank 25, the outlet end of the second liquid storage tank 25 is connected to the inlet end of the refrigerant pump 24, the outlet end of the refrigerant pump 24 is connected to the first three-way valve 20, and the refrigerant inlet end of the tubular heat exchanger 23 is connected to the second three-way valve 21. An LNG inlet 26 is provided on the upper surface of the tubular heat exchanger 23, and an LNG outlet 27 is provided on the lower surface of the tubular heat exchanger 23. The LNG inlet 26 is connected to the LNG inlet quick connector 13 on the side wall of the ice maker shell 1 through a pipeline, and the LNG outlet 27 is connected to the LNG outlet quick connector 14 on the side wall of the ice maker shell 1 through a pipeline.

[0025] Working method and principle of use: The refrigerant is added to the first liquid storage tank 17 and the second liquid storage tank 25 respectively. The refrigerant in the refrigeration mechanism is converted into high-temperature and high-pressure gas through the compressor 15, and then enters the condenser 16 and becomes a high-pressure liquid at room temperature, and then enters the expansion valve 18 through the first liquid storage tank 17 to become a low-temperature and low-pressure liquid, and then enters the heat exchange coil 19 and exchanges heat with the water in the ice box 7, so that the water in the ice box 7 gradually turns into ice, and the refrigerant re-enters the compressor 15, and the above process is circulated. When using LNG cold energy, switch the first three-way valve 20 and the second three-way valve 21 to transfer the heat exchange coil 19 in the refrigeration mechanism to the pipeline of the LNG heat exchange mechanism, connect the gaseous LNG cold energy to the LNG inlet quick connector 13 on the side wall of the ice maker shell 1 through the hose connector, connect the recovery end hose connector to the LNG outlet quick connector 14 on the side wall of the ice maker shell 1, and the LNG cold energy enters the tubular heat exchanger to exchange heat with the refrigerant in the discharge pipe of the tubular heat exchanger. The refrigerant in the LNG heat exchanger is extracted by the refrigerant pump 24, enters the heat exchange coil 19 through the first three-way valve 20, and similarly exchanges heat with the water in the ice box 7 through the heat exchange coil 19, thereby making ice. Then the refrigerant re-enters the tubular heat exchanger to exchange heat with the LNG cold energy, and the above steps are repeated. When making ice, the piston rod of the cylinder 10 is retracted, the baffle 11 presses the ice making groove 8 of the ice making box 7, and water enters the ice making groove 8 from the water inlet 9. When the water is made into ice, the piston rod of the cylinder 10 is pushed outward, and the ice cubes automatically fall to the bottom of the partition 2 by gravity and are collected. The melted water enters the return water tank 5 through the drainage hole 28 for water recovery. The utility model has a reasonable structure. In addition to the traditional refrigeration mechanism inside the ice maker, it is also connected to the LNG heat exchange mechanism through two three-way valves. When LNG cold energy is used for refrigeration, the refrigeration mechanism passage is closed, and the heat exchange coil 19 is connected to the LNG heat exchange mechanism, so that LNG cold energy is used for heat exchange and ice making, and the reuse of LNG cold energy is realized, saving energy costs, and reducing energy consumption and carbon emissions.

[0026] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0027] 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. An LNG cold energy recovery ice making device, characterized in that: Including ice making mechanism, refrigeration mechanism and LNG heat exchange mechanism; The ice-making mechanism comprises an ice-making machine housing (1), a partition (2) is arranged inside the ice-making machine housing (1), an ice-making chamber (3) and a device installation chamber (4) are arranged inside the ice-making machine housing (1) through the partition (2), a return water tank (5) is arranged inside the ice-making machine housing (1) and below the partition (2), an inclined plate (6) is arranged inside the ice-making chamber (3), an ice-making box (7) is arranged outside the inclined plate (6), an ice-making groove (8) is arranged inside the ice-making box (7), and the ice-making groove (8) is arranged inside the ice-making box (7). 8) are interconnected, one end of the ice box (7) is provided with a water inlet (9), both sides of the upper surface of the inclined plate (6) are provided with a cylinder (10), the piston rod of the cylinder (10) passes through the inclined plate (6) and is connected to the baffle (11), the baffle (11) is movably arranged outside the ice box (7), the upper part of the device installation cavity (4) is provided with a bracket (12), and one side of the ice maker housing (1) is respectively provided with an LNG inlet quick connector (13) and an LNG outlet quick connector (14); The refrigeration mechanism comprises a compressor (15), a condenser (16), a first liquid storage tank (17), an expansion valve (18) and a heat exchange coil (19); the heat exchange coil (19) is attached to the upper surface of the ice making box (7); two ends of the heat exchange coil (19) are respectively connected to a first three-way valve (20) and a second three-way valve (21); the compressor (15) is arranged inside the ice making machine housing (1); the condenser (16) is arranged on the back plate of the ice making machine housing (1); and a heat exchange coil (19) is arranged on the back plate of the ice making machine housing (1) and at the condenser (16). An exhaust louver (22) is provided, the first liquid storage tank (17) and the expansion valve (18) are arranged on the upper surface of the bracket (12), the outlet end of the compressor (15) is connected to the inlet end of the condenser (16), the outlet end of the condenser (16) is connected to the inlet end of the first liquid storage tank (17), the outlet end of the first liquid storage tank (17) is connected to the inlet end of the expansion valve (18), the outlet end of the expansion valve (18) is connected to the first three-way valve (20), and the second three-way valve (21) is also connected to the inlet end of the compressor (15); The LNG heat exchange mechanism comprises a tubular heat exchanger (23), a refrigerant pump (24), and a second liquid storage tank (25); the tubular heat exchanger (23), the refrigerant pump (24), and the second liquid storage tank (25) are all arranged in the ice making machine housing (1); the refrigerant outlet end of the tubular heat exchanger (23) is connected to the inlet end of the second liquid storage tank (25); the outlet end of the second liquid storage tank (25) is connected to the inlet end of the refrigerant pump (24); the outlet end of the refrigerant pump (24) is connected to the first three-way valve (20); The refrigerant inlet end of the tubular heat exchanger (23) is connected to the second three-way valve (21); the upper surface of the tubular heat exchanger (23) is provided with an LNG inlet (26); the lower surface of the tubular heat exchanger (23) is provided with an LNG outlet (27); the LNG inlet (26) is connected to the LNG inlet quick connector (13) on the side wall of the ice maker housing (1) through a pipeline; and the LNG outlet (27) is connected to the LNG outlet quick connector (14) on the side wall of the ice maker housing (1) through a pipeline.

2. The LNG cold energy recovery ice-making device according to claim 1, characterized in that: A drainage hole (28) is provided at the bottom of the partition plate (2), and a return water port (29) is provided at the bottom of the return water tank (5).

3. The LNG cold energy recovery ice-making device according to claim 1, characterized in that: The ice-making machine housing (1) is arranged to be open (30) at the ice-making chamber (3).

4. The LNG cold energy recovery ice-making device according to claim 1, characterized in that: Inspection doors (31) are provided on the sides of the ice-making machine housing (1) and located in the ice-making chamber (3) and the device installation chamber (4).

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