CN201047685Y - Energy-saving type marine injector refrigerating cycle device - Google Patents

Abstract

The utility model discloses a refrigeration circulation device of a power-saving naval jet apparatus and comprises a compressor, a condenser which is connected with a pipeline of the compressor. The condenser is connected with a high cold storage and a low temperature cold storage by a plurality of pipelines, the high and the low temperature cold storages are connected with the compressor by the pipeline, a jet apparatus that can integrate the pressure of the refrigerant in the high and the low temperature cold storages is arranged on the pipeline of the compressor and the high and the low temperature cold storages, the jet apparatus is provided with two inlets and an outlet, wherein, one inlet of the jet apparatus is connected with the high temperature cold storage by the pipeline, while the other inlet is connected with the low temperature cold storage by the pipeline, and the outlet is connected with the compressor by the pipeline. The high-pressure gaseous cryogen come out from a high temperature cold storage evaporator is used as the working fluid of the jet apparatus, whereas the low-pressure gaseous cryogen come out from a low temperature cold storage evaporator is used as the injected fluid of the jet apparatus. In the jet apparatus, the two fluids carry out a momentum interchange and then decelerates and increases the pressure, thus lowering the high temperature evaporation pressure and increasing the low temperature evaporation pressure, furthermore, the air inlet pressure of the evaporator is increased while the air discharge temperature is lowered, and the unit volume refrigerating quantity is increased, thus reaching the aim of energy conservation.

Description

Energy-saving marine ejector refrigeration cycle device

technical field

The utility model relates to the technical field of refrigeration cycles, in particular to a refrigeration cycle system for ship cold storage.

Background technique

Most of the existing ship cold storages adopt a single-unit multi-storage refrigeration system, that is, two or more cold storages with different temperatures share one refrigeration compression device. In order to ensure that the high-temperature cold storage is within the range of 5°C, an evaporation pressure regulating valve is often installed on the return air pipe of the high-temperature storage to ensure the evaporation temperature of the high-temperature cold storage; It becomes basically equal to the pressure of the refrigerant coming out of the evaporator of the low-temperature cold storage, which is bound to be accompanied by energy loss.

Utility model content

The technical problem to be solved by the utility model is to provide an energy-saving marine ejector refrigeration cycle device.

In order to solve the problems referred to above, the technical scheme of the utility model is as follows:

In order to make full use of this energy and achieve the effect of saving energy, we introduced an ejector to the original marine refrigeration system cycle to replace the original evaporation pressure regulating valve. When the ejector is applied to the marine refrigeration cycle system, it can increase the cooling capacity of the whole device, reduce the power of the compressor, improve the efficiency of the device, and achieve the effect of energy saving.

The energy-saving marine ejector refrigeration cycle device includes a compressor and a condenser connected to the pipeline of the compressor. The condenser is connected to the high and low temperature cold storage through a plurality of pipelines, and the high and low temperature cold storage is connected to the compressor through the pipeline. It is characterized in that , on the pipeline between the compressor and the high and low temperature cold storage, an ejector integrating the refrigerant pressure of the high and low temperature cold storage is provided, the ejector has two inlets and one outlet, one inlet of the ejector is connected to the high temperature cold storage through a pipeline, and the other One inlet is connected to the low-temperature cold storage through a pipeline, and the outlet is connected to a compressor through a pipeline.

The shape of the injector is dumbbell-shaped, with a necked throat in the middle, a high-temperature cold storage refrigerant inlet in the axial direction at one end of the throat, and a low-temperature cold storage refrigerant inlet on one side of the high-temperature cold storage refrigerant inlet, There is a trumpet-shaped mixing chamber on the inner surface of the refrigerant inlet of the high-temperature cold storage and the refrigerant inlet of the low-temperature cold storage, and the other end of the throat is a horn-shaped diffuser.

There is a thermal expansion valve on the pipeline connecting each high and low temperature refrigerator with the condenser, and a one-way valve allowing the refrigerant to flow to the ejector on the pipeline connecting each high and low temperature refrigerator to the ejector.

When working: the high-pressure gaseous refrigerant from the evaporator of the high-temperature cold storage is used as the working fluid of the ejector, and the low-pressure gaseous refrigerant from the evaporator of the low-temperature cold storage is used as the injected fluid of the ejector. In the ejector, the two fluids exchange momentum and decelerate and pressurize, so that the high-temperature evaporation pressure decreases, the low-temperature evaporation pressure increases, the compressor inlet pressure increases, the exhaust temperature decreases, and the cooling capacity per unit volume increases, which can achieve energy saving the goal of.

Beneficial effects, the utility model increases the cooling capacity of the entire refrigeration system, reduces the power of the compressor, improves the efficiency of the refrigeration system, and achieves the effect of energy saving.

Description of drawings

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment;

Fig. 1 is a structural schematic diagram of an energy-saving marine ejector refrigeration cycle device of the present invention.

Figure 2 is a schematic structural view of the injector of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

The energy-saving marine ejector refrigeration cycle device includes a compressor 1, a condenser 2 connected to the pipeline of the compressor 1, and the condenser 2 is connected to a high-temperature cold storage 4 and a low-temperature cold storage 6 through a plurality of pipelines. There are thermal expansion valves on the pipelines connected to the cold stores 4 and 6. The high and low temperature cold stores 4 and 6 are connected to the ejector 5 through the pipeline, and the ejector 5 is connected to the compressor 1 through the pipeline. The ejector 5 has two inlets 51 , 52 and one outlet 53, one inlet 51 of the ejector 5 is connected to the high-temperature refrigerator 4 through a pipeline, the other inlet 52 is connected to the low-temperature refrigerator 6 through a pipeline, and the outlet 53 is connected to the compressor 1 through a pipeline.

The ejector 5 is dumbbell-shaped in shape, and has a necked throat 54 in the middle, a high-temperature cold storage refrigerant inlet 51 in the axial direction at one end of the throat 54, and a low-temperature cold storage refrigerant inlet 51 on one side of the high-temperature cold storage refrigerant inlet 51. The cold storage refrigerant inlet 52 has a trumpet-shaped mixing chamber 55 on the inner surface of the high-temperature cold storage refrigerant inlet 51 and the low-temperature cold storage refrigerant inlet 52, and the other end of the throat 54 is a trumpet-shaped diffuser 56.

The working process is as follows: Compressor 1 compresses the refrigerant vapor from the return air pipe into a gas at a certain temperature and pressure, then cools the gaseous refrigerant into liquid through the condenser 2, and then divides it into two paths and sends it to the High and low temperature cold storage 4, 6, the liquid refrigerant evaporates into a gaseous state in the cold storage, absorbing the heat in the cold storage, so as to achieve the cooling effect. The high-pressure gaseous refrigerant from the evaporator of the high-temperature refrigerator 4 is used as the working fluid of the injector 5 , while the low-pressure gaseous refrigerant from the evaporator of the low-temperature refrigerator 6 is used as the injected fluid of the ejector 5 . The working fluid expands adiabatically through the nozzle, the pressure decreases continuously, the speed increases continuously, and it reaches a very high speed at the outlet of the nozzle, so it has great kinetic energy. The refrigerant vapor flowing out of the high-temperature cold storage 4 flows out from the nozzle at a very high speed, enters the receiving chamber of the injector 5, and sucks the ejected fluid with a lower pressure in the receiving chamber. In the ejector 5, the potential energy or thermal energy of the refrigerant vapor flowing out of the high-temperature cold storage is initially transformed into kinetic energy. Part of the kinetic energy of the refrigerant vapor flowing out of the high-temperature cold storage is transferred to the refrigerant vapor flowing out of the low-temperature cold storage. During the process of flowing along the ejector, the speed of the mixed fluid gradually becomes equal, so the kinetic energy of the mixed refrigerant vapor is reversed in the diffuser. converted into potential energy or thermal energy. The refrigerant vapor pressure from the diffuser is between the refrigerant vapor pressure from the high-temperature cold storage evaporator and the refrigerant vapor pressure from the low-temperature cold storage evaporator.

In the ejector 5, the two fluids exchange momentum and decelerate and pressurize, so that the high-temperature evaporation pressure decreases, the low-temperature evaporation pressure increases, the intake pressure of the compressor increases, the exhaust temperature decreases, and the cooling capacity per unit volume increases, which can reach The purpose of saving energy and improving economic benefits.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. energy-saving injector refrigerating circulatory device peculiar to vessel, comprise compressor, the condenser that links to each other with compressor circuit, condenser connects the high and low temperature freezer by a plurality of pipelines, the high and low temperature freezer connects compressor by pipeline, it is characterized in that, the pipeline of compressor and high and low temperature freezer is provided with the injector of integrating high and low temperature freezer refrigerating agent pressure, described injector has outlet of two inlets, an inlet of injector connects the high temperature freezer by pipeline, another inlet connects low-temperature cold store by pipeline, and outlet connects compressor by pipeline.

2. energy-saving injector refrigerating circulatory device peculiar to vessel according to claim 1, it is characterized in that, described injector profile is a dumb-bell shape, the centre has the throat of a constriction, the axial direction of throat's one end has a high temperature freezer refrigerating agent import, side in high temperature freezer refrigerating agent import has a low-temperature cold store refrigerant inlet, has a tubaeform mixing chamber at the medial surface of agent import of high temperature freezer refrigerating and low-temperature cold store refrigerant inlet, and the other end of throat is a tubaeform diffuser.

3. energy-saving injector refrigerating circulatory device peculiar to vessel according to claim 1 and 2, it is characterized in that, have heating power expansion valve on each high and low temperature freezer and the pipeline that condenser is connected, have the check valve that allows the refrigerant flow direction injector on each high and low temperature freezer and the pipeline that injector is connected.

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