KR102177470B1 - Multifunctional freezer - Google Patents

Abstract

The present invention relates to a multifunctional refrigeration device. According to the present invention, the multifunctional refrigeration device comprises: a compressor; a three-way variable valve; a condenser; a first check valve connected to an output end of the condenser; a heat exchanger; a second check valve connected to an output end of the heat exchanger; a liquid receiver; a refrigeration valve; a first expansion valve; a dehumidification valv;, a second expansion valve; an evaporator; a compressor valve; a third expansion valve; and a liquid receiver valve. According to the present invention, energy efficiency can be improved.

Description

Multifunctional freezer {Multifunctional freezer}

The present invention relates to a multifunctional refrigeration device, and more specifically, it provides a refrigeration mode, a dehumidification cooling mode, and a safety mode, while preventing the generation of flash gas in the process of circulating liquid refrigerant and gaseous refrigerant by changing states. At the same time, it prevents liquid refrigerant and gaseous refrigerant from being mixed with each other and prevents incomplete evaporation, thereby preventing overloading to the compressor, as well as enhancing energy efficiency, and heat exchanger for high-pressure liquid refrigerant discharged from the condenser. Energy efficiency can be improved by lowering the inlet temperature of the expansion valve by cooling with the high-pressure liquid refrigerant discharged from the compressor, and by preventing overheating or expansion in the compressor and receiver, damage is prevented and safety is secured. It relates to a capable, multifunctional refrigeration device.

In general, in the refrigeration cycle, the four processes of compression → condensation → expansion → evaporation are sequentially circulated, and the refrigerant changes to high-pressure gas as it passes through the compressor, and changes to high-pressure liquid as it passes through the condenser, and passes through the expansion valve As a result, it changes to a low pressure liquid, and as it passes through the evaporator, it changes to a low pressure gas, and the state is repeatedly circulated.

Air conditioners using such a refrigeration cycle dissipate the heat of condensation generated by converting high-pressure gas into high-pressure liquid in the condenser and dissipate it as waste heat by dissipating it into the atmosphere through the outdoor unit.

For reference, the technology that utilizes waste heat by lowering the relative humidity of the air passing through the evaporator by using the condensation heat generated from the condenser is described in "Registration No. 10-1624173 (notified date May 26, 2016). It has been disclosed in "The dehumidifying device that improves the dehumidification efficiency in a thermo-hygrostat that combines constant temperature and humidity and dehumidification functions by recycling the condensed heat of the outdoor unit."

However, in the conventional refrigeration apparatus including the registration number 10-1624173, the liquid refrigerant generated due to incomplete evaporation in the evaporator or heat exchanger in the process of circulating while the liquid refrigerant and gaseous refrigerant change states As the mixture is mixed and supplied to the compressor, liquid hammering occurs due to hydraulic compression in the compressor, thereby damaging the compressor and reducing energy efficiency.

In addition, the conventional refrigeration apparatus has a problem in that energy efficiency is deteriorated because the amount of gaseous refrigerant supplied to the condenser and the heat exchanger cannot be relatively controlled.

Registered Patent Publication No. 10-1624173

An object of the present invention is to solve the conventional problems as described above, while providing a refrigeration mode, a dehumidification cooling mode, and a safety mode, a flash gas (flash) in a process in which a liquid refrigerant and a gaseous refrigerant are circulated while changing states. In addition to preventing the occurrence of, liquid refrigerant and gaseous refrigerant are prevented from mixing with each other, and incomplete evaporation is prevented to prevent overloading of the compressor and to increase energy efficiency. have.

Another object of the present invention is to provide a multifunctional refrigeration apparatus capable of improving energy efficiency by lowering the inlet temperature of an expansion valve by cooling the high-pressure liquid refrigerant discharged from the condenser with the high-pressure liquid refrigerant discharged from the heat exchanger. Have.

Another object of the present invention is to provide a multifunctional refrigeration device capable of ensuring safety while preventing damage by preventing overheating or expansion from occurring in a compressor and a receiver.

As a means for achieving the above object, the configuration of the present invention includes a compressor for compressing a low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant, a 3-way variable valve having an input terminal connected to the compressor, and the 3-way variable valve. A condenser that condenses a high-pressure gaseous refrigerant into a high-pressure liquid refrigerant, a first check valve connected to the output terminal of the condenser, and an input terminal to the second output terminal of the 3-way variable valve A heat exchanger for heating the cold air generated from the evaporator by heat exchange with a high-pressure gas refrigerant, a second check valve connected to the output terminal of the heat exchanger, and 1 A receiver with a first inlet connected to the output end of the check valve and a second inlet connected to the output end of the second check valve, a refrigeration valve connected to the first outlet of the receiver, and the refrigeration valve. A first expansion valve for expanding the high-pressure liquid refrigerant into a low-pressure liquid refrigerant, a dehumidification valve connected to the first outlet of the receiver, and the dehumidification valve connected to the high-pressure liquid refrigerant at low pressure. A second expansion valve for expanding into a liquid refrigerant of, the first expansion valve and the second expansion valve, an evaporator for evaporating the low-pressure liquid refrigerant into a low-pressure gaseous refrigerant and sending it to the compressor, and the receiver A compressor valve connected to a second outlet of the compressor valve, a third expansion valve connected to the compressor valve and configured to expand and evaporate a high-pressure liquid refrigerant into a low-pressure liquid refrigerant and deliver it to the compressor; and It is preferable to include a receiver valve connected to the third outlet.

The configuration of the present invention includes a receiver temperature sensor installed in the receiver and for measuring the temperature of the receiver, a receiver water level sensor installed in the receiver and for measuring the level of a liquid refrigerant in the receiver, and the Compressor temperature sensor installed in the compressor to measure the temperature of the compressor, indoor humidity sensor to measure indoor humidity, indoor temperature sensor to measure indoor temperature, the receiver temperature sensor, receiver water level It is connected to the sensor, compressor temperature sensor, indoor humidity sensor, and indoor temperature sensor, and operates in refrigeration mode and dehumidification cooling mode according to the room temperature and room humidity, and opens the compressor valve when it is determined that the temperature of the compressor is higher than the set temperature. When it is determined that the temperature of the receiver is higher than the set temperature or the water level of the receiver is higher than the set level, the receiver valve is opened to discharge the gaseous refrigerant from the receiver to the outside, and the receiver valve is driven. A receiver valve driving part for driving the compressor valve, a compressor valve driving part for driving the compressor valve, a 3-way variable valve driving part for driving the 3-way variable valve, a dehumidifying valve driving part for driving the dehumidifying valve, and the refrigeration It is preferable to further include a refrigeration valve driving unit for driving the valve.

In the configuration of the present invention, it is preferable to arbitrarily adjust the amount of high-pressure liquid refrigerant flowing into the first expansion valve and the second expansion valve by using a 3-way variable valve instead of the refrigeration valve and the dehumidification valve.

In the configuration of this invention, it is preferable if the capacity is set so that the pressure drop of the first expansion valve occurs more than the pressure drop of the second expansion valve.

In the configuration of the present invention, the receiver includes a shell having a storage space formed therein, a cover installed on the upper portion of the shell, first and second inlets installed on the side of the shell, and the cover A liquid refrigerant tube having one end connected to the first and second outlets and extending the other end to a lower portion of the internal storage space of the shell, and one end at the third outlet. The gas refrigerant tube is connected and the other end extends to the upper part of the internal storage space of the shell, and a fusible plug formed on the side of the shell.

(C는 냉매가스 정수, D는 쉘의 바깥지름(m), L은 쉘의 길이(m))로 산출되면 바람직하다.The configuration of this invention is that the fusible plug is an alloy of lead, antimony, tin, and zinc, and has a melting temperature of 75°C, and the diameter (d) of the fusible plug suitable for the melting temperature of 75°C is

(C is the refrigerant gas constant, D is the outer diameter of the shell (m), L is preferably the length of the shell (m)).

This invention provides a refrigeration mode, a dehumidification cooling mode, and a safety mode, preventing the generation of flash gas, and at the same time, the liquid refrigerant and the gaseous refrigerant are circulated while changing states. By preventing the mixture from being mixed and preventing incomplete evaporation, it not only prevents overloading of the compressor, but also increases energy efficiency, and cools the high-pressure liquid refrigerant discharged from the condenser with the high-pressure liquid refrigerant discharged from the heat exchanger. Energy efficiency can be improved by lowering the inlet temperature of the expansion valve, and damage can be prevented and safety can be secured at the same time by preventing overheating or expansion from occurring in the compressor and receiver.

1 is a circuit diagram of a multifunctional refrigeration apparatus according to an embodiment of the present invention.
2 is a block diagram of a control system of a multifunctional refrigerating apparatus according to an embodiment of the present invention.
3 is a block diagram of a receiver of a multifunctional refrigeration apparatus according to an embodiment of the present invention.

Hereinafter, in order to describe in detail enough that a person of ordinary skill in the art can easily implement the present invention, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Other objects, features, and operational advantages, including the object, operation, and effect of the present invention, will become more apparent by the description of the preferred embodiment.

For reference, the embodiments disclosed herein have been presented by selecting the most preferable embodiments to aid understanding of those skilled in the art among various possible examples, and the technical idea of the present invention is necessarily limited or limited only by the presented embodiments. Rather, various changes, additions, and changes including equivalents or substitutes are possible within the scope of the technical idea of the present invention.

In addition, the expressions of terms or words used in the specification and claims of the present application are defined on the basis of the principle that the inventor can appropriately define the concept of terms in order to explain his or her invention in the best way. , It should not be interpreted as being limited to a conventional or dictionary meaning, and should be interpreted as a meaning and concept consistent with the technical idea of the present invention. As an example, the expression in the singular includes a plurality of expressions unless clearly defined otherwise in the context, and the expression about the direction is set based on the position expressed on the drawing for convenience of description, and is "connected" or "connected" The expression "become" includes not only direct connection or connection, but also connection or connection through other elements in the middle. In addition, the expression "~unit" includes a unit realized using hardware, a unit realized using software, a unit realized using both hardware or software, and one unit is one or more hardware or software. It may be realized using, or two or more units may be realized using one piece of hardware or software.

1 is a circuit diagram of a multifunctional refrigeration apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of a multifunctional refrigeration apparatus according to an embodiment of the present invention includes a compressor 1 for compressing a low pressure gaseous refrigerant into a high pressure gaseous refrigerant, and an input terminal to the compressor 1 A three-way variable valve (2) connected thereto, and an input terminal connected to the first output terminal of the three-way variable valve (2), and a condenser (3) for condensing a high-pressure gaseous refrigerant into a high-pressure liquid refrigerant; The first check valve 4 connected to the output terminal of the condenser 3 and the input terminal connected to the second output terminal of the 3-way variable valve 2 are installed around the evaporator 13 to provide the evaporator 13 A heat exchanger (5) for heating the cold air generated from the heat exchanger using heat exchange with a high-pressure gas refrigerant, a second check valve (6) connected to the output terminal of the heat exchanger (5), and the first A receiver 7 having a first inlet 73a connected to the output end of the check valve 4 and a second inlet 73b connected to the output end of the second check valve 6, and the receiver ( A refrigeration valve 9 connected to the first outlet 74a of 7), and a first expansion valve 10 connected to the refrigeration valve 9 and for expanding a high-pressure liquid refrigerant into a low-pressure liquid refrigerant And, a dehumidification valve 11 connected to the first outlet 74a of the receiver 7 and an agent for expanding a high-pressure liquid refrigerant into a low-pressure liquid refrigerant. 2 The expansion valve 12 and the evaporator connected to the first expansion valve 10 and the second expansion valve 12 to evaporate a low-pressure liquid refrigerant into a low-pressure gaseous refrigerant and deliver it to the compressor (1) ( 13), a compressor valve 14 connected to the second outlet 74b of the receiver 7, and a compressor valve 14 connected to the compressor valve 14, and expands a high-pressure liquid refrigerant into a low-pressure liquid refrigerant. And a third expansion valve 15 for evaporating at the same time and sending it to the compressor 1, and a receiver valve 8 connected to the third outlet 74c of the receiver 7.

The compressor 1, the 3-way variable valve 2, and the condenser 3 are assembled with an outdoor unit and installed outdoors, and the rest are assembled with an indoor unit and installed indoors.

The 3-way variable valve 2 has a structure capable of arbitrarily adjusting the supply ratio of the high-pressure gas refrigerant supplied to the condenser 3 and the heat exchanger 5, respectively.

Instead of the refrigeration valve 9 and the dehumidification valve 11, a 3-way variable valve may be used to arbitrarily adjust the amount of high-pressure liquid refrigerant flowing into the first expansion valve 10 and the second expansion valve 12. There is also.

The capacity is set so that the pressure drop of the first expansion valve 10 occurs more than the pressure drop of the second expansion valve 12 so that the temperature drop occurs more in the evaporator 13.

Meanwhile, a control system for controlling a refrigeration mode, a dehumidification cooling mode, and a safety mode is added to the multifunctional refrigeration apparatus shown in FIG. 1.

2 is a block diagram of a control system of a multifunctional refrigerating apparatus according to an embodiment of the present invention.

As shown in Figure 2, the configuration of the control system of the multifunctional refrigeration apparatus according to an embodiment of the present invention is installed in the receiver 7 and the receiver temperature for measuring the temperature of the receiver 1 A sensor 21, a receiver level sensor 22 installed in the receiver 7 and for measuring the level of the liquid refrigerant in the receiver 1, and a compressor 1 installed in the compressor 1 The compressor temperature sensor 23 for measuring the temperature of the room, the indoor humidity sensor 24 for measuring the humidity of the room, the room temperature sensor 25 for measuring the temperature of the room, and the receiver temperature sensor ( 21), connected to the receiver water level sensor (22), compressor temperature sensor (23), indoor humidity sensor (24), and indoor temperature sensor (25), and operates in refrigeration mode and dehumidification cooling mode depending on the indoor temperature and indoor humidity. If it is determined that the temperature of the compressor (1) is higher than the set temperature, the compressor valve (14) is opened, and the temperature of the receiver (7) is higher than the set temperature or the water level of the receiver (7) is set When it is determined that it is higher, a control unit 30 that opens the receiver valve 8 so that the gaseous refrigerant in the receiver 7 is discharged to the outside, and a receiver valve driving unit for driving the receiver valve 8 (41), a compressor valve driving part 42 for driving the compressor valve 14, a 3-way variable valve driving part 43 for driving the 3-way variable valve 2, and the refrigeration valve 9 ), and a dehumidifying valve driving unit 44 for driving the dehumidifying valve 11 and a refrigeration valve driving unit 45 for driving the dehumidifying valve 11.

3 is a block diagram of a receiver of a multifunctional refrigeration apparatus according to an embodiment of the present invention.

As shown in Figure 3, the configuration of the receiver 7 of the multifunctional refrigeration apparatus according to an embodiment of the present invention, a shell 71 having a storage space formed therein, and the shell 71 The cover 72 installed on the upper side, first and second inlets 73a and 73b installed on the side of the shell 71, and first to third outlets installed on the cover 72 (74a, 74b, 74c) and a liquid refrigerant tube (75) having one end connected to the first and second outlets (74a, 74b) and extending the other end to the bottom of the internal storage space of the shell (71) And, a gas refrigerant tube 76 having one end connected to the third outlet 74c and extending the other end to an upper portion of the internal storage space of the shell 71, and formed on the side of the shell 71 It comprises a fusible plug (77).

The fusible plug 77 is an alloy of lead, antimony, tin, and zinc and has a melting temperature of 75°C, and the diameter (d) of the fusible plug 77 suitable for the melting temperature of 75°C is as follows: Is calculated,

Here, C is the constant of the refrigerant gas, D is the outer diameter (m) of the shell, and L is the length (m) of the shell.

According to the above configuration, the operation of the multifunctional refrigeration apparatus according to an embodiment of the present invention is as follows.

1. Refrigeration mode

When power is applied, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous refrigerant of 80 to 90°C in the compressor 1 and sent to the 3-way variable valve 2.

After measuring the indoor temperature using the indoor temperature sensor 25, the controller 30 opens the 3-way variable valve 2 to the condenser 3 when it is determined that the indoor temperature is higher than the set temperature. ) To flow into the condenser (3) of a high pressure gaseous refrigerant of 80 to 90°C.

The high-pressure gaseous refrigerant introduced into the condenser 3 is condensed into a high-pressure liquid refrigerant having a high pressure of 40 to 45°C by air cooling in the condenser 3 and is sent to the receiver 7 through the first check valve 4.

The receiver 7 separates the gaseous refrigerant contained in the high-pressure liquid refrigerant and prevents the generation of flash gas so that only the high-pressure liquid refrigerant is provided to the first expansion valve 10. When a gaseous refrigerant or flash gas is mixed with a high-pressure liquid refrigerant, the refrigeration capacity is rapidly reduced by interfering with the normal operation of the first expansion valve 10, and an overload is applied to the compressor 1. It will damage (1) or shorten the life.

When the control unit 30 opens the refrigeration valve 9, the liquid refrigerant having a high pressure of 40 to 45° C. stored in the receiver 7 is expanded while passing through the first expansion valve 10 to produce a low pressure required for refrigeration. As a liquid refrigerant, the pressure drops and is sent to the evaporator 13.

The low-pressure liquid refrigerant introduced into the evaporator 13 is evaporated into a low-pressure gaseous refrigerant while absorbing surrounding heat in the evaporator 13 and sent to the compressor 1.

The low pressure gaseous refrigerant introduced into the compressor 1 is compressed by the high pressure gaseous refrigerant at 80 to 90°C again in the compressor 1 and is sent to the 3-way variable valve 2, so that the refrigeration cycle is repeatedly performed.

2. Dehumidifying cooling mode

When power is applied, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous refrigerant of 80 to 90°C in the compressor 1 and sent to the 3-way variable valve 2.

After measuring the indoor humidity using the indoor humidity sensor 24, the controller 30 moves the 3-way variable valve 2 toward the condenser 1 and the heat exchanger 5 when it is determined that the indoor humidity is higher than the set humidity. By opening the gas refrigerant having a high pressure of 80 ~ 90 ℃ sent from the compressor (1) flows into the condenser (3) and the heat exchanger (5). In this case, the control unit 30 improves energy efficiency by adjusting the amount of the high-pressure gas refrigerant supplied to the condenser 3 and the heat exchanger 5 according to the indoor temperature and indoor humidity.

The high-pressure gaseous refrigerant introduced into the condenser 3 is condensed into a high-pressure liquid refrigerant having a high pressure of 40 to 45°C by air cooling in the condenser 3 and is sent to the receiver 7 through the first check valve 4.

The receiver 7 separates the gaseous refrigerant contained in the high-pressure liquid refrigerant and prevents the generation of flash gas so that only the high-pressure liquid refrigerant is provided to the first expansion valve 10. When a gaseous refrigerant or flash gas is mixed with a high-pressure liquid refrigerant, the refrigeration capacity is rapidly reduced by interfering with the normal operation of the first expansion valve 10, and an overload is applied to the compressor 1. It will damage (1) or shorten the life.

When the control unit 30 opens the dehumidification valve 11, the liquid refrigerant having a high pressure of 40 to 45°C stored in the receiver 7 is expanded while passing through the second expansion valve 12, resulting in a low pressure required for dehumidification cooling. As a liquid refrigerant of, the pressure drops and is sent to the evaporator 13.

The low-pressure liquid refrigerant introduced into the evaporator 13 is evaporated into a low-pressure gaseous refrigerant while absorbing surrounding heat in the evaporator 13 and sent to the compressor 1.

In addition, the high pressure gaseous refrigerant of 80 to 90°C introduced into the heat exchanger 5 raises the temperature of the cool air through heat exchange with the cool air (saturated humid air of 7 to 12°C) emitted from the evaporator 13. It is condensed into a liquid refrigerant having a high pressure of 15 to 20°C while removing moisture contained in cold air by zooming, and is sent to the receiver 7 through the second check valve 6.

As described above, cold air (saturated humid air of 7 to 12°C) is continuously generated from the evaporator 13, and the generated cold air is Posong Posong from which moisture is removed through heat exchange with a high pressure gas refrigerant of 80 to 90°C. By turning into one air and supplying it to the room, it lowers the humidity of the room.

In addition, the high pressure liquid refrigerant of 15 to 20°C introduced from the heat exchanger 5 to the receiver 7 is mixed with the high pressure liquid refrigerant of 40 to 45°C introduced from the condenser 3 to the receiver 7 As they are mixed, the high pressure liquid refrigerant of 40 to 45°C in the receiver 7 is lowered to 25 to 30°C, and the inlet temperature of the first expansion valve 10 and the second expansion valve 12 is reduced to 25 to 30°C. By cooling to ℃, it increases the cooling effect and increases energy efficiency.

3. Safe Mode

During the refrigeration cycle or refrigeration dehumidification cycle, the controller 30 measures the temperature of the compressor 1 using the compressor temperature sensor 23, and then, if it is determined that the temperature of the compressor 1 is higher than the set temperature, , By opening the compressor valve 14, the high-pressure liquid refrigerant stored in the receiver 7 is expanded as a low-pressure liquid refrigerant while passing through the third expansion valve 15 and evaporated into a low-pressure gaseous refrigerant. As it flows into 1), it absorbs surrounding heat and prevents the compressor 1 from overheating.

In addition, the controller 30 measures the temperature and water level of the receiver 7 using the receiver temperature sensor 21 and the receiver level sensor 22, and the temperature of the receiver 7 is lower than the set temperature. If it is determined that the water level of the receiver 7 is higher or the water level of the receiver 7 is higher than the set water level, the gas refrigerant in the receiver 7 is discharged to the outside by opening the receiver valve 8, which is a flash gas. Is generated or when gaseous refrigerant is mixed with high-pressure liquid refrigerant, energy efficiency is lowered, and an overload is applied to the compressor 1 due to incomplete evaporation in the evaporator 13, thereby damaging the compressor 1 or This is because it shortens.

On the other hand, when the temperature of the receiver 7 rises abnormally and sharply above 75° C., the fusible plug 77 made of an alloy of lead, antimony, tin, and zinc formed on the side of the shell 71 ) Is melted and the high-pressure liquid solvent stored in the receiver 7 is discharged to the outside, preventing the receiver 7 from being damaged, and at the same time, the refrigerant having abnormal high temperature and high pressure is discharged to the first expansion valve 10 And/or an accident caused by being transmitted to the second expansion valve 12 is prevented in advance.

1: compressor 2: 3-way variable valve
3: condenser 4: first check valve
5: heat exchanger 6: second check valve
7: receiver 8: receiver valve
9: refrigeration valve 10: first expansion valve
11: dehumidification valve 12: second expansion valve
13: evaporator 14: compressor valve
15: 3rd expansion valve

Claims (6)

A compressor for compressing a low pressure gaseous refrigerant into a high pressure gaseous refrigerant,
A 3-way variable valve having an input terminal connected to the compressor,
An input terminal connected to the first output terminal of the 3-way variable valve and condensing a high-pressure gaseous refrigerant into a high-pressure liquid refrigerant;
A first check valve connected to the output terminal of the condenser,
A heat exchanger having an input terminal connected to the second output terminal of the 3-way variable valve and installed around the evaporator to increase the temperature of the cold air generated from the evaporator by heat exchange with the high-pressure gas refrigerant,
A second check valve connected to the output terminal of the heat exchanger,
A receiver having a first inlet connected to the output terminal of the first check valve and a second inlet connected to the output terminal of the second check valve,
A refrigeration valve connected to the first outlet of the receiver,
A first expansion valve connected to the refrigeration valve and configured to expand a high-pressure liquid refrigerant into a low-pressure liquid refrigerant,
A dehumidification valve connected to the first outlet of the receiver,
A second expansion valve connected to the dehumidification valve and configured to expand a high-pressure liquid refrigerant into a low-pressure liquid refrigerant;
An evaporator connected to the first expansion valve and the second expansion valve and configured to evaporate a low-pressure liquid refrigerant into a low-pressure gaseous refrigerant and send it to a compressor;
A compressor valve connected to a second outlet of the receiver,
A third expansion valve connected to the compressor valve and configured to expand a high-pressure liquid refrigerant into a low-pressure liquid refrigerant and simultaneously evaporate and deliver it to the compressor;
A receiver valve connected to a third outlet of the receiver,
A receiver temperature sensor installed in the receiver to measure the temperature of the receiver,
A receiver water level sensor installed in the receiver and configured to measure the level of the liquid refrigerant in the receiver;
A compressor temperature sensor installed in the compressor and for measuring the temperature of the compressor,
An indoor humidity sensor for measuring indoor humidity,
A room temperature sensor for measuring the indoor temperature,
It is connected to the receiver temperature sensor, receiver level sensor, compressor temperature sensor, indoor humidity sensor, and indoor temperature sensor, and operates in refrigeration mode and dehumidification cooling mode according to the room temperature and indoor humidity, and the temperature of the compressor is set. If it is judged to be higher than the temperature, the compressor valve is opened, and when the temperature of the receiver is higher than the set temperature or the level of the receiver is higher than the set level, the receiver valve is opened to discharge the gaseous refrigerant from the receiver to the outside. A control unit that allows
A receiver valve driving unit for driving the receiver valve,
A compressor valve driving unit for driving the compressor valve,
A 3-way variable valve driving unit for driving the 3-way variable valve,
A dehumidification valve driving unit for driving the dehumidification valve,
Multifunctional refrigeration apparatus comprising a refrigeration valve driving unit for driving the refrigeration valve. delete The method of claim 1,
Instead of the refrigeration valve and the dehumidification valve, a 3-way variable valve is used to arbitrarily adjust the amount of high-pressure liquid refrigerant flowing into the first expansion valve and the second expansion valve. The method of claim 1,
Multifunctional refrigeration apparatus, characterized in that the capacity is set so that the pressure drop of the first expansion valve occurs more than the pressure drop of the second expansion valve. The method of claim 1,
The receiver,
A shell with a storage space formed therein,
A cover installed on the upper part of the shell,
First and second inlets installed on the side of the shell,
First to third outlets installed on the cover,
A liquid refrigerant tube having one end connected to the first and second outlets and extending the other end to a lower portion of the internal storage space of the shell;
A gas refrigerant tube having one end connected to the third outlet and the other end extending to an upper portion of the internal storage space of the shell;
Multifunctional refrigeration apparatus comprising a fusible plug formed on the side of the shell. The method of claim 5,
The fusible plug is an alloy of lead, antimony, tin, and zinc and has a melting temperature of 75°C,
The diameter (d) of the fusible plug suitable for the melting temperature of 75°C is

(C is a refrigerant gas constant, D is the outer diameter of the shell (m), L is a multifunctional refrigeration device, characterized in that calculated as the length of the shell (m).

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