KR200267158Y1 - refrigeration system - Google Patents

Abstract

The present invention allows the liquid flow to pass through the outside of the liquid separator in which the refrigerant gas discharged from the evaporator flows from the condenser to the expansion valve, thereby eliminating the liquid receiver, improving liquid separation performance, reducing the capacity of the liquid receiver, and reducing the amount of refrigerant charged. The designers use this device at the same time that the environmental degradation caused by the improvement of the freezing performance and device reduction and the destruction of Freon's ozone layer, which are aimed at improving the freezing performance, is getting worse and the world is facing the reduction of the usage of Freon. The present invention relates to a refrigeration system that can reduce the amount of refrigerant refrigerant charge by about 50% compared to the existing system, thereby increasing the efficiency of the refrigerating device and reducing the refrigerant charge amount of the refrigerant.

Description

Refrigeration system {refrigeration system}

The present invention allows the liquid flow to pass through the outside of the liquid separator in which the refrigerant gas discharged from the evaporator flows from the condenser to the expansion valve, thereby eliminating the liquid receiver, improving liquid separation performance, reducing the capacity of the liquid receiver, and reducing the amount of refrigerant charged. In this case, the inventors of the device have increased the freezing performance, the device reduction and the environmental damage caused by the destruction of Freon's ozone layer. The present invention relates to a refrigeration system that can reduce the amount of refrigerant refrigerant charge by about 50% compared to the existing system, thereby increasing the efficiency of the refrigerating device and reducing the refrigerant charge amount such as the freon.

As shown in FIG. 4, the refrigeration system includes a compressor (80) for compressing a refrigerant gas to a condensation pressure in a state of high temperature and high pressure, and a cooling fan (for water-cooled type) in the refrigerant compressed in the compressor (80). Condenser 81 which condenses to liquid phase by heat dissipation by blowing air, other than coolant and other coolant or device is used, and the liquid refrigerant in the high temperature and high pressure state condensed in the condenser 81 The expansion valve 87 expands the gaseous refrigerant at low pressure by the throttling action, and the blower 89 (depending on the object to be cooled) by evaporating the latent heat of the refrigerant while evaporating the refrigerant expanded in the expansion valve 87. There are many types of evaporators depending on the type or structure of liquid, milk or other refrigeration system, but in this description, the air blown by air) is cooled by heat exchange and the refrigerant gas is supplied to the compressor (80). An evaporator (88) for returning the refrigerant circulation cycle is made.

On the other hand, during the refrigeration cycle, the state must be changed from gas to liquid and liquid to gas continuously. If moisture is contained in the refrigerant, the water circulates in the apparatus together with the refrigerant during the freezing process, and water is frozen at low temperature parts such as expansion valves or capillaries. Because of the freeze-clogging phenomenon that blocks the circulation circuit of the refrigerant, the freezing window is closed and the phase change of the refrigerant is not made smoothly. (The freezer using ammonia is diluted with ammonia water when water penetrates. There is no accident but water separation is necessary because the evaporation pressure is increased during water dilution. Not only does the refrigeration system not function but also the refrigeration system is corroded.

In particular, in a refrigeration system using a refrigerant such as R-12, when moisture is mixed with the refrigerant, the chemical reaction with the refrigerant shortens the life of the refrigerant due to corrosion resistance to the metal and reduces the life of the refrigerant. In the freezer, it will be fatally adversely affected.

In order to solve this problem caused by moisture, in the freezing incubator, a dryer 85 (adsorbent of porous material such as silica gel) is adsorbed between the condenser 81 and the expansion valve 87 to adsorb moisture mixed in the refrigerant. In addition, a receiver 83 is provided between the condenser 81 and the dryer 85 to supply only the liquid refrigerant to the expansion valve 87.

That is, a drying agent and a filter are built into the housing of the dryer 85, and moisture is absorbed from the refrigerant flowing from the condenser 81 to the expansion valve 87 by the desiccant, and the moisture contained in the refrigerant by the filter. Other foreign matter is filtered out.

In addition, the receiver 83 temporarily stores the refrigerant in response to the load variation of the refrigeration cycle, and separates the uncondensed refrigerant or the non-condensable gas contained in the liquid refrigerant, and installs a soluble plug. In this case, when the refrigerant is overheated beyond the refrigeration system using this available field, the refrigerant is forcibly discharged to protect the system.

On the other hand, when the refrigerant gas discharged from the evaporator 88 is not completely evaporated, the discharged refrigerant gas contains a liquid refrigerant, and when the refrigeration system is stopped, the pipe line between the evaporator 88 and the compressor 80 The refrigerant gas present in the liquid phase turns into a liquid phase. Therefore, the liquid refrigerant may flow into the compressor 80.

Since the liquid refrigerant is an incompressible fluid, when the liquid refrigerant flows into the compressor 80, a liquid compression phenomenon occurs and a hammering noise, that is, a hammering noise is generated, and the liquid refrigerant is not compressed. Burnout is caused.

Therefore, the necessity of fundamentally blocking the introduction of the liquid refrigerant into the compressor 80 is required. For this purpose, a liquid separator is provided for separating the liquid refrigerant between the evaporator 88 and the compressor 80 and supplying only refrigerant gas to the compressor. 90 is installed.

In addition, a filter 91 for removing the foreign matter is further installed between the liquid separator 90 and the compressor 80 to prevent foreign matter from entering the compressor 80 and damaging the compressor 80. Of the reference numerals shown in FIG. 4, 84 denotes a solenoid valve for shutting off the refrigerant, and reference numeral 86 denotes a sight glass.

However, in the conventional refrigeration system as described above, when the refrigerant passes through the receiver 83, the dryer 85, and the solenoid valve 84, the passage resistance is large, due to the capacity control of the expansion valve 87, and the like. When the refrigerant passes through the receiver 83, the liquid state is full, but just before the expansion valve 87, the high pressure fluctuations are severe because the liquid flows while crossing the full and half liquid state.

In order to prevent this, the refrigerant is always kept in the full state more than necessary in the receiver 83, but in this case, the problem of increasing the size of the receiver 83 and increasing the amount of refrigerant charge is the Montreal Convention (to destroy the ozone layer). Since the amount of use of the Freon refrigerant is limited after the Convention on the Restriction of Use of the Freon Refrigerant, it is necessary to develop a freezer having a small amount of Freon charge. In addition, in the conventional refrigerating device, between the evaporator 88 and the compressor 80, The installed liquid separator 90 has a structure in which the liquid separation pipe 90a installed inside the housing is bent in a U-shape so that the liquid refrigerant does not flow into the liquid separation pipe 90a. Due to the refrigerant, the oil contained in the liquid refrigerant cannot be separated during charging and start-up at low temperature, the liquid is introduced into the compressor together with the liquid refrigerant, and the compressor is compressed by liquid compression. If the flow rate of the refrigerant gas flowing due to the rapid evaporation pressure fluctuation on the evaporator side is large, there is a high risk that the liquid refrigerant will be attracted to the liquid separation pipe 90a and flow into the liquid separation pipe 90a. Has been considered as a basic technique in the refrigeration technology.

The present invention has been made in consideration of the above-described conventional problems, and by passing a refrigerant flowing from the condenser to the expansion valve outside the liquid separator for separating the liquid refrigerant contained in the refrigerant gas discharged from the evaporator to the compressor, It is possible to exclude and improve the liquid separation performance, reduce the capacity of the receiver, reduce the amount of refrigerant charge and improve the freezing performance. At this time, designers can reduce the amount of freon refrigerant charge by 50% compared to the existing system, increasing efficiency of refrigeration system and reducing refrigerant charge amount such as freon. For the purpose.

The best object of the present invention is to provide a refrigeration system that can improve the liquid separation performance, reduce the capacity of the receiver, reduce the amount of refrigerant charge and improve the freezing performance, so that most of the refrigerant is used as a simple and eco-friendly technology of the refrigerating device. Freon destroys the ozone layer 10,000 times more than its own amount, and the destruction of the ozone layer will reach its peak in 100 years, so the freezing device of the present invention is supplied as soon as possible. I want to subtract a little

1 is a block diagram showing a refrigeration system according to a first embodiment of the present invention

2 is a block diagram showing a refrigeration system according to a second embodiment of the present invention

Figure 3a is a schematic cross-sectional view showing an example of the use of the liquid separator and the outer housing constituting the refrigeration system according to the present invention

Figure 3b is a schematic cross-sectional view showing another example of use of the liquid separator and the outer housing

Figure 3c is a schematic cross-sectional view showing another example of use of the liquid separator and the outer housing

Figure 3d is a schematic cross-sectional view showing another example of use of the liquid separator and the outer housing

4 is a block diagram showing a conventional refrigeration system

<Explanation of symbols for the main parts of the drawings>

10 compressor 12 condenser

15: receiver 18: dryer

20: outer housing 24: expansion valve

26: evaporator 30: liquid separator

30a: housing of the liquid separator 30b: vortex induction machine

In order to achieve the above object, the refrigeration system according to the present invention, a compressor for compressing and discharging the refrigerant gas at a high temperature and high pressure state, a condenser for condensing the refrigerant compressed in the compressor in the liquid phase by heat dissipation, from the condenser By drying the dryer to remove the moisture contained in the discharged refrigerant and the liquid refrigerant in the high temperature and high pressure state condensed in the condenser, the liquid in the low pressure state (in a real refrigeration cycle evaporates the refrigerant itself to lower the refrigerant to low temperature The low-temperature low-pressure liquid refrigerant and the low-temperature low-pressure gas coexist with the refrigeration effect.) An expansion valve that expands to the refrigerant, and absorbs heat from the object to be cooled by using the latent heat of evaporation of the refrigerant while evaporating the expanded refrigerant from the expansion valve. Evaporation to change into low temperature low pressure refrigerant gas and return the low temperature low pressure refrigerant gas to the compressor And a liquid separator separating the refrigerant of the undistilled refrigerant gas which is discharged from the evaporator and returned to the compressor, the inlet end of the expansion valve being connected to the outlet end of the dryer and around the housing of the liquid separator. It is characterized in that the outer housing is further connected.

In addition, according to the present invention, it is preferable that the sight glasses are installed in the conduit between the outer housing and the expansion valve.

In addition, according to the present invention, a small receiver for storing and discharging the high-temperature high-pressure liquid refrigerant condensed by the condenser in the conduit between the condenser and the dryer may be further installed.

In addition, it is preferable that a torsion pipe or a vortex induction device is installed in the housing of the liquid separator.

According to the refrigerating system of the present invention configured as described above, the high temperature and high pressure liquid refrigerant discharged from the dryer flows through the space between the housing outer surface of the liquid separator and the inner surface of the outer housing to the expansion valve, the low pressure discharged from the evaporator Since the gaseous refrigerant flows through the housing of the liquid separator to the compressor, the temperature (heat) of the liquid refrigerant of high temperature and high pressure is transferred to the refrigerant gas of low pressure, and the suction refrigerant is transferred to the compressor in a state where the liquid refrigerant contained in the refrigerant gas is completely vaporized. Can be supplied.

In addition, since the temperature of the liquid refrigerant deprived of the refrigerant gas decreases in temperature, the refrigerant of the uncondensed portion to be contained in the liquid refrigerant is further condensed and flows into the evaporator through the expansion valve in a state condensed into a fully liquefied liquid refrigerant. This may increase the refrigeration effect in the cycle and reduce the amount of refrigerant charge to prevent liquid compression.

The features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors will appropriately describe the concepts of terms in order to best explain their own design. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

<Example 1>

A refrigeration system according to Embodiment 1 of the present invention will be described with reference to FIG. 1.

Reference numeral 10 denotes a compressor which sucks refrigerant gas and compresses it at high temperature and high pressure and discharges it, and according to the purpose of use, various types of compressors such as reciprocating, crank, swash plate, wobble plate, rotary, scroll, etc. May be employed.

The discharge line of the compressor 10 is connected to the condenser 12, the condenser 12 is condensed into a liquid refrigerant of high temperature and high pressure by radiating the refrigerant gas discharged from the compressor (10). Although not specifically illustrated here, the condenser 12 includes a plurality of tubes forming a predetermined flow path by connecting the upper header, the lower header, and the upper / lower headers to communicate with each other, and between the tubes. Conventional forms with corrugated heating fins stacked may be used. Therefore, the air blown by the cooling fan passes through the heat transfer fins between the tubes, and in this process, the temperature of the refrigerant flowing in the condenser 12 is lost to the blower air to condense the refrigerant.

According to this embodiment, the solenoid valve 16 for blocking the condensation refrigerant discharged from the condenser 12 is connected to the discharge line side of the condenser 12, the condenser on the discharge line side of the solenoid valve 16 A dryer 18 is provided for removing moisture contained in the condensed refrigerant discharged from 12. The dryer 18 may be a conventional type in which a desiccant and a filter are built into the housing.

Therefore, moisture may be absorbed from the refrigerant flowing from the condenser 12 to the evaporator by the drying agent, and foreign matter other than the moisture contained in the refrigerant may be filtered by the filter.

On the other hand, the inlet line side of the compressor 10 by evaporating the refrigerant flowing from the expansion valve 24 to be described later by using the latent heat of evaporation at this time evaporator 26 to achieve a refrigeration effect by heat-exchanging the object and the refrigerant to be cooled ) Is connected, and the liquid separator 30 separating the liquid refrigerant contained in the refrigerant gas discharged from the evaporator 26 and returning only the refrigerant gas to the compressor 10 between the evaporator 26 and the compressor 10. ) Is installed, and a filter 32 is installed between the liquid separator 30 and the compressor 10 to remove foreign substances to prevent damage to the compressor 10 due to the inflow of foreign substances into the compressor 10. .

In addition, an expansion valve 24 for supplying the liquid refrigerant in the high temperature and high pressure state supplied to the inlet end of the evaporator 26 to the evaporator 26 so as to easily evaporate by expanding the liquid refrigerant in the low pressure state by the throttling action. Is installed. Although not shown in detail, the expansion valve 24 has an internal pressure equalization capillary tube for controlling the opening degree of the high-pressure refrigerant flow path through the pressure transfer rod by the expansion displacement of the diaphragm according to the temperature inside the thermostat chamber. The thermostatic expansion valve, generally called TEV, is used, such as external pressure control to control the opening degree of the high pressure refrigerant flow path by the expansion displacement of the diaphragm.

According to this embodiment, the outer housing 20 which is connected to the outlet end of the dryer 18 and connected to the inlet end of the expansion valve 24 is installed around the housing of the liquid separator 30, thereby providing a The discharged high-temperature, high-pressure liquid refrigerant flows to the expansion valve 24 through a space between the outer surface of the housing 30a of the liquid separator 30 and the inner surface of the outer housing 20.

Accordingly, the temperature of the high temperature and high pressure liquid refrigerant flowing from the dryer 18 and flowing to the expansion valve 24 through the space between the outer surface of the housing 30a of the liquid separator 30 and the inner surface of the outer housing 20 is evaporator. The liquid refrigerant contained in the refrigerant gas is completely vaporized by being transferred to the low pressure refrigerant gas discharged from the 26 and passing through the inside of the housing 30a of the liquid separator 30 to the refrigerant gas. Since the liquid is not supplied into the compressor 10, the liquid compression phenomenon of the compressor 10 is prevented.

In addition, the liquid refrigerant deprived of the temperature in the refrigerant gas is lowered in temperature and flows into the evaporator 26 through the expansion valve 24 in a state in which the refrigerant gas that can be contained in the liquid refrigerant is condensed, the latent heat of evaporation increases and the freezing performance is increased Can be improved.

According to the present embodiment, in order to further improve the performance of the liquid separator 30, as shown in Figure 1 and 3a, a torsion tube or spring shape inside the housing 30a of the liquid separator 30 It is preferable that the vortex induction device of is installed.

As shown in FIG. 3B, a torsion tube or a spring-shaped vortex induction device 30b is not installed inside the housing 30a of the liquid separator 30, and may be applied to a small refrigeration system. The inlet end of the liquid separator 30 and the inlet end of the outer housing 20 and the outlet end of the outer separator 20 and the outlet end of the outer housing 20 are disposed below the liquid separator 30 and the outer housing. It is preferable to install and use (20) in the upright position.

In addition, the installation of the torsional pipe or the spring-shaped vortex induction device 30b inside the housing may be applied to the medium / large refrigeration system, and in this case, as shown in FIG. 3A, the liquid separator 30 and Although it is preferable to install and use the outer housing 20 in an upright position, the liquid separator 30 and the outer housing 20 may be installed horizontally as shown in FIG. 3C or obliquely as shown in FIG. 3D. Can be installed in an inclined state. In this case, it is preferable that the inlet end of the outer housing 20 is disposed above and the outlet end of the outer housing 20 is disposed below.

In FIG. 1, reference numeral 22 denotes a sight glass.

Next, the operation of the refrigeration system according to the present embodiment will be described.

When the compressor 10 is driven, the low pressure refrigerant gas discharged from the evaporator 26 and passed through the liquid separator 30 and the filter 32 is sucked into the compressor 10, and thus the refrigerant gas sucked into the compressor 10. Is compressed into a refrigerant gas of high temperature and high pressure and discharged to the condenser 12.

The refrigerant gas introduced into the condenser 12 is radiated and condensed into a liquid refrigerant having a high temperature and high pressure, and flows into the dryer 18 through the solenoid valve 16. As the liquid refrigerant passes through the dryer 18, moisture and foreign matter contained in the liquid refrigerant are removed, and then the liquid refrigerant is introduced into the outer housing 20.

Since the outlet end of the outer housing 20 is disposed below, only the liquid refrigerant may be discharged and supplied to the expansion valve 24. The high pressure liquid refrigerant supplied to the expansion valve 24 is expanded to a low pressure refrigerant by a throttling action, thereby changing to a state that is likely to evaporate, and flows into the evaporator 26.

The refrigerant having a low temperature and low pressure introduced into the evaporator 26 is evaporated by heat exchange with the object to be cooled, and a freezing effect may be performed by latent heat of evaporation. In addition, the gaseous refrigerant discharged from the evaporator 26 passes through the liquid separator 30, and in this process, the liquid refrigerant that may be contained in the gaseous refrigerant is separated, so that only the gaseous refrigerant is discharged from the liquid separator 30 to filter 32. ). The foreign matter contained in the gaseous refrigerant is removed while the gaseous refrigerant passes through the filter 32, and only the pure gaseous refrigerant is returned to the compressor 10.

It should be noted that in the case of the low temperature of the discharge gas of the compressor, a slight overheating compression enhances the freezing effect. In the case of the R-22, the temperature of the discharge gas of the compressor is high. When the compression ratio is large, some wet compression lowers the temperature of the discharged gas of the compressor and extends the life of the compressor.In the refrigerating device, the designer of the device is operated at the optimum conditions according to the characteristics of the refrigerant using the evaporation temperature or the condensation temperature. In the case of ammonia, the specific heat ratio is high and the discharge gas of the compressor is high. Therefore, it should be recognized that there are a large number of refrigerants that can be used, such as installing a water jacket around the cylinder of the compressor for water cooling.

In the refrigerant cycle process, the high temperature and high pressure is discharged from the dryer 18 and flows to the expansion valve 24 through a space between the outer surface of the housing 30a of the liquid separator 30 and the inner surface of the outer housing 20. The liquid refrigerant comes into contact with the outer surface of the housing 30a of the liquid separator 30.

Accordingly, the temperature of the liquid refrigerant is discharged from the evaporator 26 to heat transfer to the low pressure refrigerant gas passing through the housing 30a of the liquid separator 30 to heat the refrigerant gas. Therefore, since the liquid refrigerant contained in the refrigerant gas is completely vaporized and supplied to the compressor 10 through the filter 32, the liquid refrigerant of the compressor 10 is prevented as the liquid refrigerant does not flow into the compressor 10. can do.

On the contrary, the liquid refrigerant whose temperature has been deprived of the refrigerant gas is introduced into the evaporator 26 through the expansion valve 24 while the temperature of the liquid refrigerant is lowered and the refrigerant gas which may be contained in the liquid refrigerant is condensed. Freezing performance can be improved.

<Example 2>

A refrigeration system according to Embodiment 2 of the present invention will be described with reference to FIG. 2. In the present embodiment, the same reference numerals as those in the first embodiment refer to the same elements, and detailed descriptions of the same elements are omitted.

According to this embodiment, a receiver 15 for storing and discharging the high temperature and high pressure liquid refrigerant condensed by the condenser 12 is further installed in the conduit between the condenser 12 and the dryer 18. .

In the present invention, since the liquid refrigerant passing through the outer housing 30 is exchanged with the refrigerant gas passing through the liquid separator 30 and then flows to the expansion valve 24, in the present embodiment, the receiver 15 is compared with the conventional one. A small capacity may be employed.

Incidentally, in this embodiment, the installation positions of the dryer 18 and the solenoid valve 16 may be changed from those in the first embodiment.

The present invention allows the coolant flowing from the condenser to the expansion valve through the outside of the liquid separator in which the refrigerant gas discharged from the evaporator passes, thereby eliminating the receiver, improving the liquid separation performance, reducing the capacity of the receiver, reducing the amount of refrigerant charged and Increasing freezing performance to reduce freezing performance, reducing equipment, and destroying the environment caused by the destruction of Freon's ozone layer are more severe and the world is facing the challenge of reducing the use of Freon. It is possible to reduce the amount of refrigerant refrigerant charge of 50% compared to the existing refrigeration system, thereby increasing the efficiency of the refrigerating device and reducing the refrigerant charge amount of the refrigerant.

Claims (4)

A compressor for compressing and discharging the refrigerant gas at a high temperature and high pressure, a condenser for condensing the refrigerant compressed in the compressor to a liquid phase by heat radiation, a dryer for removing moisture contained in the refrigerant discharged from the condenser, and the condenser The expansion valve for expanding the liquid refrigerant in the high temperature and high pressure state condensed into the liquid refrigerant in the low pressure state by the throttling action, and by using the latent heat of evaporation of the refrigerant while evaporating the refrigerant expanded in the expansion valve, And a liquid separator for separating evaporated liquid refrigerant fraction contained in the refrigerant gas discharged from the evaporator and returned to the compressor by evaporating and evaporating the gaseous refrigerant gas of low temperature and low pressure to the compressor. In the refrigeration system comprising a, And an outer housing connected to the outlet end of the dryer and connected to the inlet end of the expansion valve around the housing of the liquid separator. The refrigeration system according to claim 1, wherein a fluoroscope is provided in a conduit between the outer housing and the expansion valve. The refrigeration system according to claim 1, further comprising a receiver for storing and discharging the high temperature and high pressure liquid refrigerant condensed by the condenser in a conduit between the condenser and the dryer. The refrigeration system according to claim 1 or 3, further comprising a torsion tube or a spring-shaped vortex induction device is further provided inside the housing of the liquid separator.