Refrigerating unit

FIELD: instrument making.

SUBSTANCE: invention relates to refrigerating equipment. The proposed refrigerating unit incorporates consecutively mounted device to increase operating medium temperature and pressure, condenser, throttling device and evaporator. It comprises additional pipeline with its input connected to aforesaid device that serves to increase operating medium temperature and pressure and output connected to condenser output and throttling device input. Aforesaid additional pipeline is fitted parallel to the said condenser and furnished with superheated vapor metered-feed device that receives the said superheated vapor from the device to increase operating medium temperature and pressure. The superheated vapor metered-feed device represents a jet, electromagnetic valve, or servo-drive gate.

EFFECT: increased refrigeration ratio.

2 cl, 4 dwg

 

The invention relates to refrigeration equipment, namely, equipment for refrigerating machines, and can be used in the cells for food storage for air conditioning, cooling of electronic equipment of vehicles with internal combustion engines, and also for cooling the plug transportable devices for thermal insulation systems of enterprises.

Known compressor of the refrigeration installation according to the author's certificate of the USSR No. 1749646, CL F25 1/00, 1992, containing a circulating refrigerant circuit serially fitted with a compressor, a condenser, a circulating pump, regulating valve and the evaporator. Installation is further provided with a subcooler installed in the circuit between the condenser and circulating pump, and the outlet of the circulation pump is connected via a second control valve with the steam space of the condenser and the evaporator outlet is connected a by-pass pipe through a check valve with the inlet of the subcooler.

Some of the complexity of the installation and the presence within it of complex items require a considerable investment of power, reducing power and cooling factor.

Known single-stage refrigerating machine whose schema is described in the Handbook "Teplofizika the Kie base for artificial cold" publishing house "Food industry", M., 1980, p.31-32, Fig. III-3, representing one of the schemes ordinary household refrigerator and adopted for the prototype. It contains the compressor, the output of which is connected to the input capacitor, and output sequentially connected to the input of the evaporator through the built-in connecting pipeline expansion valve. The output of the evaporator is connected by a pipe to the inlet of the compressor.

However, this setting has a significant drawback, which is characterized by high costs to drive the compressor, i.e. a significant loss of power installation, entail a reduction of the cooling rate.

An object of the invention is the reduction of power supplied to the compressor, and increase the yield of the produced cold, i.e. increasing the refrigeration coefficient by obtaining a lower temperature in the evaporator.

The technical problem is solved by the fact that in the proposed solution the installation is equipped with an additional pipeline, the input connected to the output of the device to increase the pressure and temperature of the working environment, and the output coupled to the output capacitor and to the input throttling device, and the additional piping is installed in parallel to the condenser and provided with a device dosed supply of superheated steam, postupivshij is it from the device to increase the pressure and temperature of the working environment.

In addition, the device dosed supply of superheated steam is made in the form or jet, or solenoid valve, or a valve with an actuator.

Figure 1 shows a diagram of the refrigeration unit;

figure 2 is a plot of the temperature of the working medium in the evaporator from the speed of the shaft of the compressor;

figure 3 - graph of power consumed by the compressor from the engine speed of the shaft of the compressor;

figure 4 is a plot of the pressure of the working medium in the installation system from the speed of the shaft of the compressor.

The refrigeration system includes a device for increasing the pressure and temperature of the working environment, namely in the proposed installation of the compressor 1 running from the actuator 2, a condenser 3, sequentially installed from the compressor 1 and connected therewith the outlet line 4. The capacitor 3 is sequentially connected to the output pipeline with 5 input 6 throttling device 7. Throttling device 7 by a pipe 8 connected in series with the evaporator 9, which is connected to the compressor 1 through the inlet pipe 10.

The plant is equipped with additional pipeline 11, the input 12 is connected to the outlet line 4 of the compressor 1, and the output 13 is connected to the output pipe 5 of the capacitor 3 and the entrance 6 throttling ustroystva. Moreover, additional pipeline 11 is installed in parallel with the capacitor 3 and provided with a device 14 dosed supply of superheated steam coming out of the compressor 1 and partially flowing into it.

The device 14 dosed supply of superheated steam constructive can be done, for example, or solenoid valve, or a valve with an actuator. Specifically, in the proposed apparatus, in order to create a simple and inexpensive construction as the device 14 dosed supply of superheated steam used jet.

Refrigerating unit operates as follows.

The compressor 1 sucks working environment through the inlet pipe 10 of the evaporator 9. In the compressor 1 in the actions heats the working environment to the condition of dry or superheated steam and pump steam into the condenser 3, in which the steam from superheated state is switched to rich and szhizhajut, i.e. condense it to a minimum pressure. Then from the condenser 3, the working environment, but in the form of a liquid component of the liquid phase, flows through the exiting pipeline 5 input 6 throttling device 7. This is one stream is directed from the compressor 1 superheated steam.

Part of the superheated steam coming out of the compressor 1, is adjudged to be in an additional pipeline 11 through inlet 12 and Postup is et in the device 14 dosed supply of superheated steam - this second stream is directed from the compressor 1 of superheated steam. The device 14 dosed supply of superheated steam passes obtained empirically dose of steam at exit 13. Here this dose of superheated steam, steam component phase connected with out of the capacitor 3 by the liquid component of the liquid phase, is mixed with it, and thus obtained two-phase working medium: liquid + vapor through the inlet 6 a throttling device 7 enters the device itself, and the pipe 8 enters the evaporator 9. The amount of superheated steam in the vapor phase serves no more than the quantity of the supplied liquid liquid phase. In the evaporator 9, the working environment boils, absorbing the warmth.

This added dose of superheated steam, vapor phase, improves the process of boiling and serves as an accelerator of his prostacare adding my amount of heat in the upcoming process of evaporation of the liquid phase, thereby providing a more complete boiling liquid phase.

At the optimum ratio of steam and liquid phases occurs over the full boiling of the working environment that provides a significant temperature drop in the evaporator 9 ceteris paribus. This is illustrated in the graph shown in figure 2. In addition, this results in a reduction of pressure in the system and reduce power consumption whom is ressora, as evidenced by the graphs shown in figure 4, and 3.

From the evaporator 9, the working medium through the inlet pipe 10 enters the compressor 1, and the cycle repeats.

The use of the proposed solution was allowed to get lower in comparison with the known objects of the temperature in the evaporator, without resorting to additional sources of electricity, thereby resulting decrease in power supplied to the compressor, and an increased output produced by the cold, and hence an increased coefficient of performance.

1. Refrigerating unit, containing consistently set the device to increase the pressure and temperature of the working medium, a condenser, a throttling device and an evaporator, characterized in that it is provided with an additional pipeline, the input connected to the output of the device to increase the pressure and temperature of the working environment, and the output coupled to the output capacitor and to the input throttling device, and the additional piping is installed in parallel to the condenser and provided with a device dosed supply of superheated steam received from the device to increase the pressure and temperature of the working environment.

2. Installation according to claim 1, characterized in that the device dosed supply of superheated steam is made in the form or putt the EPA, or solenoid valve, or a valve with an actuator.



 

Same patents:

FIELD: heating; refrigerating or freezing plants.

SUBSTANCE: closed refrigerating circuit comprises compressor (1), condenser (2), evaporator (4), receiver (9), capillary tube (8) between condenser and receiver, capillary tube (10) between receiver and evaporator and thermal contact (11) between suction pipeline and receiver. Suction pipeline is oriented so that sucked gas passes through receiver from its lower part to upper part. Cooling agent in receiver flows from its upper part to lower part. There is thermal contact (12) between suction pipeline and capillary tube (8), which connects condenser and receiver.

EFFECT: superheating of sucked gas, prevention of water condensation in suction pipeline and increased efficiency factor.

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FIELD: heating.

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FIELD: heating.

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FIELD: heating.

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FIELD: heating.

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1 dwg

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FIELD: heating; refrigerating or freezing plants.

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FIELD: heating.

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Cooling device // 2347985

FIELD: heating.

SUBSTANCE: present invention pertains to a cooling device. The cooling device has cooling circuit (9) comprising: i) compressor (2), executing the cooling cycle; ii) evaporator (3), absorbing heat energy of the medium being cooled; iii) condenser (4), transmitting heat energy to an external medium; iv) capillary pipe (5), allowing for expansion of the cooling agent coming out of condenser (4), and carrying the cooling agent to evaporator (3); v) valve (6) with electromagnetic control, controlling flow of the cooling agent and located between condenser (4) and capillary pipe (5); vi) bypass line (7), leveling pressure in the sucking and blowing parts of the compressor (2). The cooling circuit (9) also has: i) valve (16) electromagnetically controlled, which prevent reverse flow to evaporator (3) when compressor (2) is not working and which is in the sucking part of the compressor (2); ii) control mechanism (8), which delays opening of electromagnetically controlled valve (16) by a period, which runs from starting the compressor (2) until a limit value of torque is attained.

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FIELD: heating.

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9 dwg

FIELD: heating systems.

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EFFECT: improving plant reliability and reducing plant specific consumption of materials.

16 cl, 2 dwg

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