CN209744043U - Domestic LNG air conditioner refrigerating system - Google Patents
Domestic LNG air conditioner refrigerating system Download PDFInfo
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- CN209744043U CN209744043U CN201920266679.7U CN201920266679U CN209744043U CN 209744043 U CN209744043 U CN 209744043U CN 201920266679 U CN201920266679 U CN 201920266679U CN 209744043 U CN209744043 U CN 209744043U
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Abstract
The utility model discloses a household LNG air conditioning refrigeration system, which comprises an LNG liquid storage tank, an LNG vaporizer, a temperature control device, a first heat exchanger, a second heat exchanger and an evaporator; the LNG liquid storage tank is connected with the first heat exchanger through a gasification pipeline, and the first heat exchanger is connected with a household natural gas pipeline through an output pipeline; the first heat exchanger and the second heat exchanger are connected into a cold accumulation circulation loop through a cold accumulation pipeline; the second heat exchanger and the evaporator are connected into a refrigeration circulation loop through a refrigeration pipeline; LNG vaporizer and temperature control device set gradually on the output pipeline along the natural gas flow direction, and temperature control device is used for controlling the natural gas temperature that gets into the natural gas pipeline of family. The refrigeration system utilizes LNG cold energy to replace an original air-conditioning refrigeration compressor system, so that electric energy consumed by the traditional air-conditioning system is saved; the cold accumulation circulation loop is arranged, the LNG conveying distance is reduced, and the equipment cost is low; LNG can be merged into the natural gas pipeline of family after the gasification, makes things convenient for ordinary family's use.
Description
Technical Field
the utility model relates to a refrigerating system technical field especially relates to a domestic LNG air conditioner refrigerating system.
Background
As an efficient and clean energy source, natural gas is gradually becoming one of the most rapidly growing energy industries in the world. The Liquefied Natural Gas (LNG) is formed by liquefying natural gas at low temperature, has small volume and convenient transportation, generates about 830kJ/kg of cold energy when the LNG is heated and gasified, and can bring extremely high economic benefit if the part of the cold energy can be recycled.
In recent years, there has been a device or equipment for utilizing LNG cold energy, and a utility model application No. 201510337908.6 discloses an LNG integrated utilization system and method, in which an air conditioning refrigerant introduced from an evaporator is subjected to heat exchange operation with LNG in a first heat exchanger via an air conditioning pipeline, and then returned to the evaporator via the air conditioning pipeline. In the system, the LNG and the refrigerant directly exchange heat, and the first heat exchanger needs to be arranged at a cold using place, so that the transfer distance of the LNG is increased. And the temperature is still too low after LNG heat transfer gasification, can't directly merge the family natural gas pipeline into and carry out the air feed, can't utilize the natural gas after the gasification to carry out the family air feed.
SUMMERY OF THE UTILITY MODEL
Based on this, the to-be-solved technical problem of the utility model is to provide a make full use of LNG gasification cold energy, simple structure, equipment cost are low, make things convenient for the domestic LNG air conditioner refrigerating system that the family used.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
A household LNG air-conditioning refrigeration system comprises an LNG liquid storage tank, an LNG vaporizer, a temperature control device, a first heat exchanger, a second heat exchanger and an evaporator; the LNG liquid storage tank is connected with the first heat exchanger through a gasification pipeline, and the first heat exchanger is connected with a household natural gas pipeline through an output pipeline; the first heat exchanger and the second heat exchanger are connected into a cold accumulation circulation loop through a cold accumulation pipeline; the second heat exchanger and the evaporator are connected into a refrigeration circulation loop through a refrigeration pipeline; LNG vaporizer and temperature control device set gradually along the natural gas flow direction output pipeline, temperature control device is used for controlling the natural gas temperature that gets into the natural gas pipeline of family.
In one embodiment, the temperature control device comprises a temperature rising component, a temperature detection component and a solenoid valve, wherein the temperature rising component, the temperature detection component and the solenoid valve are respectively connected with an electric control device of the refrigeration system; the temperature raising component is used for raising the temperature of the natural gas, and the temperature detecting component is used for detecting the temperature of the natural gas; the electric control device controls the electromagnetic valve to be opened when the temperature reaches a set temperature through the natural gas temperature detected by the temperature detection part; and when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the heating component is controlled to be opened.
In one embodiment, the temperature raising component comprises a temperature raising coil and a temperature raising fan, and the temperature detecting component is arranged at the tail end of the temperature raising coil; the natural gas passing through the LNG vaporizer enters the heating coil pipe to exchange heat with air; when the temperature of the natural gas after heat exchange reaches a set temperature, the electric control device controls the electromagnetic valve to be opened and the warming fan to be closed; and when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the heating fan is controlled to be opened.
In one embodiment, a coolant reservoir is arranged on the coolant storage pipeline and used for storing and regulating excess coolant.
In one embodiment, the cold storage agent in the cold storage circulation loop is ethylene glycol solution with the mass fraction of 58% -63% at room temperature.
In one embodiment, a refrigerant accumulator is arranged on the refrigerating pipeline and used for storing and regulating the excessive refrigerant.
In one embodiment, a flow regulating valve is further arranged behind the refrigerant reservoir, the flow regulating valve is electrically connected with an electric control device, and the electric control device regulates the opening degree of the flow regulating valve according to the temperature set by the air-conditioning refrigeration system.
In one embodiment, the first heat exchanger is a horizontal shell and tube heat exchanger.
In one embodiment, the LNG vaporizer is an air-temperature vaporizer.
In one embodiment, a refrigeration fan is arranged at the evaporator to improve the heat exchange efficiency between the refrigerant in the evaporator and air.
compared with the prior art, the utility model discloses an advantage is with positive effect:
The household LNG air-conditioning refrigeration system is simple in structure, and the LNG cold energy is utilized to replace an original refrigeration storage air-conditioning refrigeration compressor system, so that the electric energy consumed by the traditional air-conditioning system is saved; the cold accumulation circulation loop is arranged, so that the operation stability of the system is improved, the LNG conveying distance is reduced, and the equipment cost is low; LNG can merge into family's natural gas pipeline after the gasification, for the family provides the natural gas, makes things convenient for ordinary family's use.
Drawings
Fig. 1 is a schematic structural diagram of a household LNG air-conditioning refrigeration system of the present invention;
fig. 2 is a schematic structural diagram of a first heat exchanger in the household LNG air-conditioning refrigeration system of the present invention;
Fig. 3 is a schematic structural diagram of an LNG vaporizer in the domestic LNG air-conditioning refrigeration system of the present invention;
Description of reference numerals:
1-an LNG liquid storage tank; 2-a first heat exchanger; 3-a coolant pump; 4-a coolant reservoir; 5-a coolant pump; 6-a second heat exchanger; 7-a refrigerant accumulator; 8-a flow regulating valve; 9-an evaporator; 10-a refrigeration fan; 11-a refrigerant pump; 12-an LNG vaporizer; 13-temperature control means; 14-natural gas inlet; 15-natural gas outlet; 16-a coolant inlet; 17-a coolant outlet; 18-a heat exchange tube bundle; 19-cold storage region.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings, but which can be embodied in many different forms and are defined and covered by the following claims.
Referring to fig. 1, the present invention provides a domestic LNG air-conditioning refrigeration system, which includes an LNG liquid storage tank 1, an LNG vaporizer 12, a temperature control device 13, a first heat exchanger 2, a second heat exchanger 6, and an evaporator 9. The LNG liquid storage tank 1 is connected with the first heat exchanger 2 through a gasification pipeline, and the first heat exchanger 2 is connected with a household natural gas pipeline through an output pipeline.
The first heat exchanger 2 and the second heat exchanger 6 are connected into a cold accumulation circulation loop through a cold accumulation pipeline. The cold storage pipeline is provided with a cold storage agent pump 3. And the second heat exchanger 6 and the evaporator 9 are connected into a refrigeration circulation loop through a refrigeration pipeline. A refrigerant pump 11 is provided in the refrigeration cycle.
the LNG vaporizer 12 and the temperature control device 13 are sequentially arranged on the output pipeline along the flowing direction of natural gas, and the temperature control device 13 is used for controlling the temperature of the natural gas entering the household natural gas pipeline. When the temperature is lower than the set temperature, the natural gas passes through the temperature control device 13, and flows into the household natural gas pipeline after the temperature is increased. The potential safety hazard caused by too low natural gas temperature is prevented.
The working principle of the refrigeration system is as follows: the natural gas in the LNG liquid storage tank 1 flows into the first heat exchanger 2, exchanges heat with the coolant through the first heat exchanger 2, the coolant is cooled to minus 45-40 ℃ for cold accumulation, the coolant is transported to the second heat exchanger 6 along the flow direction, and flows back to the first heat exchanger 2 after exchanging heat with the refrigerant of the refrigeration cycle loop through the second heat exchanger 6, and cold accumulation circulation is completed.
The refrigerant exchanges heat with the low-temperature coolant through the evaporator 9, the refrigerant exchanges heat with indoor air at the evaporator 9 to release cold energy, the refrigerant pump 11 pumps the refrigerant which exchanges heat with the air into the second heat exchanger 6 to perform the cold accumulation-refrigeration cycle of the next round.
After the natural gas after the heat exchange of the first heat exchanger 2 passes through the LNG vaporizer 12, the natural gas enters the temperature control device 13 after the vaporization and temperature rise are finished, the temperature of the natural gas is adjusted through the temperature control device 13, and when the temperature is 0-5 ℃, the natural gas can be directly merged into a household natural gas pipeline. When the temperature is lower than 0 ℃, the electric control device controls the temperature control device 13 to be started to work, and the natural gas is merged into the household natural gas pipeline when the temperature is raised to 0-5 ℃.
The household LNG air-conditioning refrigeration system is simple in structure, and the LNG cold energy is used for replacing an original refrigeration storage air-conditioning refrigeration compressor system, so that the electric energy consumed by the traditional air-conditioning system is saved; the cold accumulation circulation loop is arranged, so that the operation stability of the system is improved, the LNG conveying distance is reduced, and the equipment cost is low; LNG can merge into family's natural gas pipeline after the gasification, for the family provides the natural gas, makes things convenient for ordinary family's use.
Specifically, the temperature control device 13 includes a temperature raising means, a temperature detecting means, and an electromagnetic valve. The temperature rising component, the temperature detection component and the electromagnetic valve are respectively and electrically connected with an electric control device of the refrigeration system. The temperature rising component is used for rising the temperature of the natural gas, and the temperature detection component is used for detecting the temperature of the natural gas. The electric control device controls the electromagnetic valve to be opened when the temperature reaches a set temperature through the natural gas temperature detected by the temperature detection part; when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the heating component is controlled to be opened.
the temperature-raising component comprises a temperature-raising coil pipe and a temperature-raising fan, and the temperature-detecting component is arranged at the tail end of the temperature-raising coil pipe. The natural gas passing through the LNG vaporizer 12 enters the warming coil to exchange heat with air to warm. When the temperature of the natural gas after heat exchange reaches a set temperature, the electric control device controls the electromagnetic valve to be opened and the warming fan to be closed; when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the temperature-rising fan is controlled to be opened. In other embodiments, the temperature raising component may employ other heating devices, such as an electric heater, to raise the temperature.
Further, a coolant reservoir 4 is arranged on the coolant storage pipeline and used for storing and adjusting excessive coolant. The coolant pump 3 is provided on the front side of the coolant reservoir 4, and the coolant pump 5 is provided on the rear side. The coolant after heat exchange of the first heat exchanger 2 is firstly pressurized by the coolant pump 3, and then is transported to the coolant reservoir 4 for storage. The low temperature coolant in the coolant reservoir 4 is delivered to the second heat exchanger 6 by the coolant pump 5. Through this setting up cold-storage agent reservoir 4, when the LNG supply is not enough, cold-storage system still can the steady operation a period, satisfies domestic air conditioning system to the requirement of operating stability, travelling comfort.
Preferably, the cold storage agent in the cold storage circulation loop is ethylene glycol solution with the mass fraction of 58% -63% at room temperature.
Further, a refrigerant accumulator 7 is provided on the refrigerant line for storing the excess refrigerant. A flow regulating valve 8 is also arranged behind the refrigerant liquid storage device 7, the flow regulating valve 8 is electrically connected with an electric control device, and the electric control device regulates the opening degree of the flow regulating valve 8 according to the temperature set by the air-conditioning refrigeration system.
In the present embodiment, the first heat exchanger 2 is a horizontal shell-and-tube heat exchanger. As shown in fig. 2, LNG enters at the natural gas inlet 14 of the first heat exchanger 2 and exits at the natural gas outlet 15 of the first heat exchanger 2. The coolant enters the first heat exchanger 2 from a coolant inlet 16 of the first heat exchanger 2, and flows out from a coolant outlet 17 of the first heat exchanger 2 after submerging a heat exchange tube bundle 18 of the first heat exchanger 2 at a coolant storage area 19. Preferably, the second heat exchanger 6 is a double pipe heat exchanger, and the evaporator 9 is a shell-and-tube heat exchanger.
The LNG vaporizer 12 is a single-pass heat exchanger, preferably an air-temperature vaporizer 12, and the LNG vaporizer 12 is installed in outdoor air and heats natural gas after heat exchange in the first heat exchanger 2 by natural convection of the air. Specifically, as shown in fig. 3, the LNG vaporizer 12 is formed by connecting aluminum fin tubes at regular intervals, and star-shaped fins, preferably 8 fins, are added to the outer sides of the heat exchange tubes in order to increase the heat exchange area on the air side. Delta and H are the thickness and height of the fins respectively, Di and t are the inner diameter of the heat exchange tube and the thickness of the tube bundle, and the proper heat exchange coefficient is configured by adjusting the 4 parameters.
Further, the evaporator 9 is also provided with a refrigerating fan 10 for improving the heat exchange efficiency between the refrigerant in the evaporator 9 and the air, enhancing the heat exchange between the refrigerant and the air and meeting the indoor refrigeration requirement.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A household LNG air-conditioning refrigeration system is characterized by comprising an LNG liquid storage tank, an LNG vaporizer, a temperature control device, a first heat exchanger, a second heat exchanger and an evaporator; the LNG liquid storage tank is connected with the first heat exchanger through a gasification pipeline, and the first heat exchanger is connected with a household natural gas pipeline through an output pipeline; the first heat exchanger and the second heat exchanger are connected into a cold accumulation circulation loop through a cold accumulation pipeline; the second heat exchanger and the evaporator are connected into a refrigeration circulation loop through a refrigeration pipeline; LNG vaporizer and temperature control device set gradually along the natural gas flow direction output pipeline, temperature control device is used for controlling the natural gas temperature that gets into the natural gas pipeline of family.
2. The domestic LNG air-conditioning refrigeration system according to claim 1, characterized in that the temperature control device comprises a temperature rising component, a temperature detection component and a solenoid valve, and the temperature rising component, the temperature detection component and the solenoid valve are respectively connected with an electric control device of the refrigeration system; the temperature raising component is used for raising the temperature of the natural gas, and the temperature detecting component is used for detecting the temperature of the natural gas; the electric control device controls the electromagnetic valve to be opened when the temperature reaches a set temperature through the natural gas temperature detected by the temperature detection part; and when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the heating component is controlled to be opened.
3. The domestic LNG air-conditioning refrigeration system according to claim 2, wherein the temperature raising component comprises a temperature raising coil and a temperature raising fan, and the temperature detecting component is arranged at the tail end of the temperature raising coil; the natural gas passing through the LNG vaporizer enters the heating coil pipe to exchange heat with air; when the temperature of the natural gas after heat exchange reaches a set temperature, the electric control device controls the electromagnetic valve to be opened and the warming fan to be closed; and when the temperature is lower than the set temperature, the electromagnetic valve is controlled to be closed, and the heating fan is controlled to be opened.
4. A domestic LNG air-conditioning refrigeration system according to any of claims 1 to 3, characterized in that a coolant reservoir is provided on the coolant storage line for storing excess coolant.
5. The domestic LNG air-conditioning refrigeration system of claim 4, wherein the coolant in the cold accumulation circulation loop is 58% -63% by mass of glycol solution at room temperature.
6. A domestic LNG air-conditioning refrigeration system according to any of claims 1-3, characterized in that a refrigerant accumulator is provided on the refrigeration pipeline for storing excess refrigerant to be conditioned.
7. The domestic LNG air-conditioning and refrigerating system of claim 6, wherein a flow regulating valve is further arranged behind the refrigerant reservoir, the flow regulating valve is electrically connected with an electric control device, and the electric control device adjusts the opening degree of the flow regulating valve according to the temperature set by the air-conditioning and refrigerating system.
8. A domestic LNG air-conditioning refrigeration system according to any of claims 1 to 3, characterized in that the first heat exchanger is a horizontal shell and tube heat exchanger.
9. A domestic LNG air-conditioning refrigeration system according to any of claims 1 to 3, wherein the LNG vaporizer is an air-temperature vaporizer.
10. A domestic LNG air-conditioning refrigeration system according to any of claims 1 to 3, wherein a refrigeration fan is provided at the evaporator for improving the heat exchange efficiency between the refrigerant in the evaporator and the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266679.7U CN209744043U (en) | 2019-03-01 | 2019-03-01 | Domestic LNG air conditioner refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266679.7U CN209744043U (en) | 2019-03-01 | 2019-03-01 | Domestic LNG air conditioner refrigerating system |
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| CN209744043U true CN209744043U (en) | 2019-12-06 |
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| CN201920266679.7U Active CN209744043U (en) | 2019-03-01 | 2019-03-01 | Domestic LNG air conditioner refrigerating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115137A1 (en) * | 2019-12-12 | 2021-06-17 | 蒋春辉 | Lng air conditioning refrigeration system |
| CN115479421A (en) * | 2021-06-15 | 2022-12-16 | 中集安瑞科能源装备（苏州）有限公司 | Operating system for storing, recovering and supplying cold energy |
| CN115479422A (en) * | 2021-06-15 | 2022-12-16 | 中集安瑞科能源装备（苏州）有限公司 | Cold energy recovery and remote mobile cold supply system |
-
2019
- 2019-03-01 CN CN201920266679.7U patent/CN209744043U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115137A1 (en) * | 2019-12-12 | 2021-06-17 | 蒋春辉 | Lng air conditioning refrigeration system |
| CN115479421A (en) * | 2021-06-15 | 2022-12-16 | 中集安瑞科能源装备（苏州）有限公司 | Operating system for storing, recovering and supplying cold energy |
| CN115479422A (en) * | 2021-06-15 | 2022-12-16 | 中集安瑞科能源装备（苏州）有限公司 | Cold energy recovery and remote mobile cold supply system |
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