KR0131926B1 - Liquid gas heat-exchanger combined with a dryer filter - Google Patents

Abstract

The present invention relates to a liquid-gas heat exchanger, which also serves as a dryer filter of a refrigerating device, comprising a compressor (1), a condenser (8), a liquid-gas heat exchanger (9), and a dryer constituting a refrigeration cycle of a refrigerating (cooling) device. Between the filter 10, the capillary tube M, the expansion valve 11, the evaporator 12, the liquid-gas heat exchanger 9 and the compressor 7, the flow paths 2, 3, 4, 5 and 6 (1) is connected, the refrigerant gas is passed through the internal space 32 of the body 34 in which the liquid-gas heat exchanger 9 and the dryer filter 10 are integrated, and the external space 33 The liquid refrigerant is passed through), and in the outer space 33 is provided with an absorbent system 34, an absorbent fixing plate 38 for fixing it, a filter net 35, and a filter support 36 for supporting it. In addition, since both ends of the inner space 32 and the outer space 33 of the body 34 are provided with the gas line connecting portion 31 and the liquid line connecting portion 30, the use of the liquid-gas heat exchanger and the dryer filter is performed. As it is more urgent than a refrigeration system using HCFC-based refrigerants, the freezing effect can be maximized, and the installation space in a small refrigeration unit (refrigerator, air conditioner) can be reduced, and the cost can be reduced. Since the gas heat exchanger is configured, there is an effect of preventing pressure loss on the refrigerant side.

Description

Liquid-gas heat exchanger with refrigeration dryer filter

1 is a Molyel diagram of the refrigeration unit refrigeration cycle.

2 is a configuration of a refrigeration unit refrigeration cycle.

3 is a structural diagram of a typical liquid-gas heat exchanger.

4 is a basic structural diagram of a typical dryer.

5 is a structural diagram of the present invention.

6 is a structural diagram of another embodiment of the present invention.

7 is a schematic diagram of a conventional distributor.

8 is a partial offset of the liquid-gas heat exchanger of the present invention.

＊ Explanation of symbols on main parts of drawing

1, 2, 3, 4, 5, 6: Euro 7: Compressor

8 condenser 9 liquid-gas heat exchanger

10 dryer filter 12 evaporator

30, 31 ': Gas line connection

The present invention relates to a liquid-gas heat exchanger, which also serves as a refrigerating device dryer filter, in particular, a high temperature and high pressure liquid refrigerant passing through a dryer filter and a condenser that absorbs and removes moisture from inside the refrigeration cycle and filters out foreign substances. A liquid-gas heat exchanger that integrates a low-pressure gas refrigerant to improve its cooling capacity is integrated with the dryer filter of the refrigerating unit to reduce the pressure loss of the refrigeration unit and to minimize the material saving and installation space. A liquid-gas heat exchanger.

In the conventional refrigeration cycle configuration of a conventional refrigeration apparatus, as shown in FIG. 2, the flow paths 1 and 2 are connected to the compressor 7, and the flow paths 2 and 3 are connected to the condenser 8, The flow path 3 is connected to the flow path 4 through the liquid-gas heat exchanger 9, and the flow path 4 includes a dryer filter 10, a capillary tube M, an expansion valve 11, a flow path 5, The evaporator 12 is connected, and the flow path 6 is connected to the evaporator 12 so that the flow path 1 is connected through the liquid-gas heat exchanger 9.

In the compressor (7), a high temperature and high pressure refrigerant gas compressed by the compression process (1) to (2) of the MOLLI is generated and supplied to the condenser (8) through the flow path (2), and in the condenser (8) the liquefied molybdenum is liquefied. (Condensation) processes ② to ③ are generated, and the liquefied saturated refrigerant exchanges heat with the low-temperature low-pressure gas refrigerant passing through the molly-line evaporation process ⑤ to ⑥ in the liquid-gas heat exchanger (9). Then, the supercooled liquid is supplied to the dryer filter 10 through the flow passage 4.

The dryer filter 10 removes the water dissolved in the refrigerant and the flow rate of the freezer, and then expands the liquid refrigerant having a low temperature and high pressure in the capillary tube ④ under pressure ④ to ⑤ through the flow path 5, and then the evaporator 12 through the flow path 5. Is supplied to the liquid-gas heat exchanger (9) through the flow path (6) through the evaporation process (5) to (6) of the Molyel diagram, which is completely evaporated by air and heat exchange and becomes saturated steam. Supplied.

In the liquid-gas heat exchanger (9), as the low-temperature, high-pressure saturated liquid from the condenser (8) passes through the flow path (3), it exchanges heat with the low-temperature, high-pressure saturated liquid and becomes superheated steam, and then through the flow path (1). The compressor 7 is circulated to the compressor 7 so that the compressed hot and high pressure gas can be supplied to the condenser 8.

The refrigeration cycle that undergoes this circulation process is a secondary heat exchanger in the liquid-gas heat exchanger (9) so that the liquid refrigerant in the evaporator (12) is not compressed in the compressor (7) if the liquid refrigerant is not heat exchanged sufficiently with the load change Fully superheat steam.

In addition, the secondary liquid heat exchanger in the liquid-gas heat exchanger (9) in order to prevent the saturated liquid refrigerant passing through the condenser (8) is difficult to normal expansion in the capillary tube (M) when the remaining gas is not condensed completely To become a subcooled liquid.

In the dryer filter 10, the supercooled liquid passing through the condenser 8 or the liquid-gas heat exchanger 9 removes moisture and foreign substances contained in the refrigerant just before passing through the capillary tube M, and the refrigerant is cooled to low pressure. When the water is contained in the refrigerant when it is expanded is to prevent the capillary (M) is frozen.

The conventional liquid-gas heat exchanger 9 is connected to both ends of the gas line connecting portion 21 as the evaporator 12 and the compressor 7, as shown in FIG. 3, the liquid line connecting portion 22 Is connected to the condenser 8 and the dryer filter 10.

The inside of the liquid-gas heat exchanger (9) is provided with two types of pipes, the gas refrigerant passes through the inner space 23, and the liquid refrigerant passes through the outer space 24 in the opposite direction to achieve mutual heat exchange. .

Looking at the refrigeration cycle in the Molyel diagram of FIG. 1, if there is a liquid-gas heat exchanger (9), heat exchange occurs between compression (1) and (2) and expansion (4) and (5) and evaporation (5) and (1). Normal refrigeration cycles without compression consist of compression ⑥ to ② ', expansion ③ to ⑤' and evaporation ⑤ 'to ⑥.

At this time, the process ⑤ 'to ⑥ or ⑤ to ⑥ evaporated in the evaporator 12 is generally referred to as a freezing effect. The greater the freezing effect, the greater the freezing capacity.

Therefore, the refrigeration cycle with the liquid-gas heat exchanger (9) is maximized in the subcooling ③ ~ ④ compared to the general refrigeration cycle, so the expansion effect is further increased by the position ⑤ 'to ⑤.

In addition, the evaporator outlet refrigerant gas from position ⑥ to position ① is superheated to prevent liquid compression in the compressor.

In the structure of the refrigeration cycle, a conventional dryer filter 10 is shown in FIG. 4 as shown in FIG. 4, between both ends of the body 25 between the condenser (or liquid-gas heat exchanger) and the expansion valve (or capillary tube). Is connected to the inside, the absorbent 28 absorbs moisture in the refrigerant and the fixing plate 29 for fixing it, the filter net 26 for filtering the inflow of foreign matter into the capillary tube (M), and the filter support for supporting it ( 27).

The liquid-gas heat exchanger (9) and the dryer filter (10) applied to the refrigeration cycle of the refrigerating device do not have a distinctive effect on the cycle conditions (evaporation temperature, condensation temperature). Easy to install and connect the liquid-gas heat exchanger (9) and the dryer filter (10), which are separately installed due to lack of installation space in a small refrigeration device (refrigerator, air conditioner, etc.). There was a problem that could not achieve cost reduction due to the significant impact on the miniaturization of the device (product).

The present invention is to solve the above problems, the low-temperature and high-pressure liquid refrigerant passing through the dryer filter and the condenser to absorb and remove moisture in the refrigeration cycle, and the low-temperature low-pressure gas refrigerant passing through the evaporator. It is equipped with a liquid-gas heat exchanger that improves cooling capacity by heat exchange to reduce the pressure loss of the refrigeration (cooling) device, and to minimize the material saving and installation space. It also provides a liquid-gas heat exchanger.

The present invention provides a compressor (1) constituting a refrigeration cycle of a refrigeration (cooling) device, a condenser (8), a liquid-gas heat exchanger (9), a dryer filter (10), a capillary tube (M), and an expansion valve (11); The liquid-gas heat exchanger in which the flow paths 2, 3, 4, 5, 6 and 1 are connected between the evaporator 12, the liquid-gas heat exchanger 9 and the compressor 1, respectively. The refrigerant gas passes through the internal space 32 of the body 34 in which the air conditioner 9 and the dryer filter 30 are integrated, and the liquid refrigerant passes through the external space 33, and within the external space 33. It has an absorbent 34, an absorbent fixing plate 38 for fixing it, a filter net 35, and a filter support 36 for supporting it, the inner space 32 and the outer space of the body 34 Both ends of the 33 are provided with a gas line connecting portion 30 and an liquid line connecting portion 31.

In another embodiment of the present invention, an absorbent 37, an absorbent fixing plate 38, a filter net 35, and a filter support 36 are provided in the inner space 32 of the body 34. Liquid refrigerant passes through the internal space 32 of the 34, gas refrigerant passes through the external space 33, and the gas line connection portion 30 in the external spaces 32 and 33 in both ends of the body 34. ') And the liquid line connecting portion 31'.

In the liquid line connecting portions 31 and 31 ′ of the body 34, a distributor 42 having a plurality of capillary connection holes 41 is provided.

Referring to the embodiment and the effect of the present invention configured as described in detail by the accompanying drawings as follows.

The refrigerant gas of the low temperature low pressure refrigerant gas in the evaporator 12 passes through the inner space 32 of the body 34 and exchanges heat with the low temperature and high pressure liquid refrigerant passing through the outer space 33 to prevent superheated steam (liquid compression). Prevention) and flows into the compressor (1).

At this time, the low-temperature and high-pressure liquid refrigerant passing through the condenser 8 passes through the outer space 33 and exchanges heat with the low-temperature low-pressure refrigerant passing through the inner space 32 to become a supercooled liquid and at the same time passing through the absorbent 37. Water contained in the refrigerant and the flow rate of the freezer is removed, and foreign matter is filtered out of the filter network 35 and then flows into the capillary tube (M).

In another embodiment described above, as shown in FIG. 6, the low-temperature, high-pressure liquid refrigerant passing through the condenser 8 passes through the inner space 32 and exchanges heat with the low-temperature low pressure refrigerant passing through the outer space 33. When it passes through the absorbent 37 and the filter network 35 at the same time as the supercooled liquid flows into the capillary tube (M) with water and foreign matter removed.

At this time, the low-temperature low-pressure refrigerant passing through the evaporator 12 passes through the outer space 33 and exchanges heat with the liquid refrigerant passing through the inner space 32 to become superheated steam and enter the compressor 7.

Accordingly, the state of the supercooled liquid is maximized to maximize the freezing effect, to facilitate smooth thermal expansion in the capillary tube (M), and to remove the water contained in the refrigerant and the flow rate of the freezer from the absorbent (37) to prevent freezing of the capillary tube (M). And, it is possible to prevent the clogging of the capillary tube (M) by removing the foreign matter from the filter net (35).

The liquid-gas heat exchanger 9 can be selected arbitrarily according to the pressure loss and moisture removal amount.

That is, since the pressure loss is more affected by the velocity than the viscosity of the fluid, if the heat exchanger 9 of FIG. 5 is selected to flow the gas refrigerant having a high velocity into the internal space 32 with less pressure loss, The heat exchanger 9, which can be reduced as much as possible and needs more moisture removal, makes it possible to use other embodiments.

As described above, the present invention absorbs and removes moisture from the inside of the refrigeration cycle, and heat exchanges the low-temperature and high-pressure liquid refrigerant passing through the dryer filter and the condenser to filter out the foreign matter and the low-temperature low-pressure gas refrigerant passing through the evaporator to improve the cooling ability. The liquid-gas heat exchanger and the dryer filter use the liquid-gas heat exchanger integrally with the HCFC-based refrigerant, and the use of the liquid-gas heat exchanger and the dryer filter becomes more urgent than the refrigeration system using the HCFC-based refrigerant. It can maximize the effect and at the same time reduce the installation space in the small refrigeration unit (refrigerator, air conditioner), achieve cost reduction, and prevent pressure loss on the refrigerant side by being composed of a single liquid-gas heat exchanger. There is.

Claims (3)

The liquid-gas heat exchanger and the dryer filter are integrated between the compressor constituting the refrigeration cycle of the refrigeration unit, the condenser, the liquid-gas heat exchanger, the dryer filter, the expansion mechanism, the evaporator, the liquid-gas heat exchanger, and the compressor. The refrigerant gas is passed through the inner space of the body, the liquid refrigerant is passed through the outer space, the outer space is provided with an absorbent, an absorbent fixing pin for fixing it, a filter net, and a filter support for supporting it. , Both ends of the inner space and the outer space of the body is a liquid-gas heat exchanger with a dryer filter of the refrigerating device, characterized in that the gas line connection portion and the liquid line connection portion. According to claim 1, wherein the absorbent and the absorbent fixing pin, the filter net, the filter support is provided in the inner space of the body, the liquid refrigerant is passed through the inner space of the body, the gas refrigerant is passed through the outer space , The liquid-gas heat exchanger with a dryer filter of the refrigerating device, characterized in that the outer space in both ends of the body provided with a gas line connection portion and an liquid line connection portion. 3. The liquid-gas heat exchanger as claimed in claim 1 or 2, wherein a distributor having a capillary connection hole is installed at the liquid line connection part of the body.