KR20150089287A - A low refrigerator system using defrosting of water spray method - Google Patents

Abstract

The present invention relates to a low temperature refrigerator system using a water spraying and defrosting device capable of maintaining temperature deviation within a normal temperature of 0.5 degrees centigrade in a defrosting process by installing the water spraying and defrosting apparatus and minimizing the loss of quality due to heat by preventing heat generated in a storage material stored in the low temperature refrigerator in the restart of a compressor by minimizing the heat generated in an evaporator in the defrosting process by including the compressor which compresses refrigerant gases with high temperature and pressure, a condenser which condenses the refrigerants compressed in the compressor into the liquefied refrigerant by the radiant heat by the natural wind of a cooling fan, an expansion valve which expands the refrigerants into mixed refrigerants of a low temperature and high pressure after the refrigerants pass through a filter which removes foreign materials from the liquefied refrigerant, a solenoid valve used in a pump down state and a side glass which observes the flow of the refrigerants, a water spraying and defrosting evaporator unit which evaporates the refrigerants inputted from the expansion valve into the vapor of the low temperature by exchanging heat with an external heat source and includes a spraying device, a receiver which cools the air by a blower by exchanging the heat using the evaporation latent heat of the refrigerants by passing the refrigerants through the water spraying and defrosting evaporator unit and supplies the air to the compressor, and an automatic control unit which controls the water spraying and defrosting evaporator unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a low-temperature refrigerator system using a defrosting apparatus,

The present invention relates to a low-temperature refrigerator system using a sprinkling defrosting apparatus, more specifically, a sprinkling defrosting apparatus is installed above an evaporator installed inside a low-temperature refrigerator system, and water of 20C is supplied into the evaporator, And the water discharged from the evaporator is stored in the water tank and is circulated again by the circulation pump when the evaporator is deflated so that defrosting can be performed. Temperature refrigerator system.

The present invention relates to a low temperature refrigerator system using a sprinkler defrosting apparatus, and more particularly, to a refrigerator system using a sprinkler defroster apparatus, The surface of the evaporator is kept warm by freezing the frost (ice layer) on the surface of the evaporator due to the freezing of the water vapor in contact with the atmosphere, thereby lowering the heat exchange efficiency with air, It is not only shortened but also has a problem of lowering the thermal efficiency of energy.

1, a compressor 1 for compressing a refrigerant gas into a high-temperature and high-pressure state, and a compressor 1 for compressing the refrigerant gas to a high temperature and a high pressure, as shown in FIG. 1, for removing a frozen or ice- A condenser 2 for condensing the refrigerant compressed in the condenser 2 into a liquid state by heat radiation by the natural blowing of the cooling fan, and a low-temperature and high-pressure liquid refrigerant condensed in the condenser 2 to the filter 3, the solenoid valve 4 ) And a side glass (5), and thereafter expanding the refrigerant to a mixed refrigerant at a low temperature and a high pressure state; and a heat exchanger for exchanging the refrigerant introduced from the expansion valve (6) with an external heat source A receiver (8) for cooling the air blown by the blower using the latent heat of evaporation of the refrigerant while passing through the evaporator (7) by means of heat exchange and supplying it to the compressor (1) The sensor (7-3) And an automatic controller 9 capable of controlling the temperature in the low temperature refrigerator according to a signal sensed by the evaporator 7, wherein an electric heater 7-1 is installed at one side of the evaporator 7, So that the evaporator 7 can be defrosted and the malfunction of the electric heater 7-1 can be prevented by the overheat prevention sensor 7-2 and the main power can be shut off when the temperature exceeds 20 ° C .

However, the electric heater method requires a defrosting time of at least 30 minutes or more with a gradual increase in temperature, a loss of power consumption is large, and a stored product stored in the refrigerator is thawed due to a sudden temperature change due to latent heat of the evaporator There has been a demand for development of a technique capable of performing a defrosting operation without affecting the operation of the refrigerating apparatus.

Korean Patent Registration No. 10-0545789

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a water spray defroster capable of being defrosted by disposing water spraying device at an upper part of an evaporator, The present invention also provides a low temperature refrigerator system using water spraying defrosting apparatus that allows water to fall down through an evaporator to be stored in a water tank and to be repeatedly defrosted while circulating through a circulation pump for a predetermined period of time.

Another object of the present invention is to provide a low-temperature refrigerator system using a water spraying defrosting apparatus in which power consumption during defrosting is reduced by 70% or more, and water temperature and water level in a water tank are automatically controlled according to a set standard will be.

According to an aspect of the present invention, there is provided a refrigerator including: a compressor for compressing refrigerant gas into a high-temperature and high-pressure state; a condenser for condensing the refrigerant compressed in the compressor into a liquid state by heat radiation by natural blowing of the cooling fan; An expansion valve for expanding the refrigerant into a low-temperature and high-pressure mixed refrigerant after sequentially passing through a filter for removing foreign matter from the condensed low-temperature and high-pressure liquid refrigerant, a solenoid valve used when the pump is down, and a side glass for observing the refrigerant flow A water spray evaporator unit including a water sprinkling device to heat the refrigerant introduced from the expansion valve to a low temperature by exchanging heat with an external heat source and a sprinkler evaporator unit including a sprinkler evaporator unit, The air to be blown is cooled by heat exchange and supplied to the compressor And the reservoir, characterized in that it comprises an automatic control unit for providing control of the evaporator defrosting the spray unit.

Wherein the water spraying defrost evaporator unit comprises an evaporator for exchanging the refrigerant introduced from the expansion valve with an external heat source, a sprinkler defroster for spraying and defrosting the evaporator when the evaporation occurs, A circulation motor disposed at one side of the water tank and capable of circulating water stored in the water tank as needed, and a circulation pump for circulating the water in the water tank, And a humidity / humidity sensor capable of measuring the temperature and humidity inside the evaporator unit, characterized in that the evaporator unit includes a humidifier which is located at another side of the evaporator unit and is capable of receiving water from the water tank and controlling the humidity of the refrigerator unit .

In the sprinkling defogger, a plurality of pipe pipes are spaced apart from each other at a predetermined interval, and a plurality of discharge ports are formed inside the pipe pipe so that water can be uniformly injected to the inside of the evaporator. So that water can be prevented from remaining inside the pipe pipe.

The water tank includes a water supply valve for allowing water to flow in from the outside, and a drain valve for discharging water stored in the water tank to the outside. Inside the water tank, A water level sensor for detecting a water level, a low level sensor for detecting a water level, a temperature sensor for measuring the temperature of water stored in the water tank, and a heater for heating water stored in the water tank .

The automatic control unit may include a screen display unit for displaying the temperature and humidity in the low temperature refrigerator and the water level in the water tank, a temperature control unit for controlling the temperature in the water tank, And a main power control unit for automatically controlling the main power control unit.

As described above, according to the low-temperature refrigerator system using the water spraying defrosting apparatus of the present invention, water in a water tank maintained at about 20 ° C at room temperature is supplied to a sprinkling defrosting apparatus using a circulation pump during defrosting of the evaporator, So that the temperature and humidity in the low temperature refrigerator can be maintained at all times by operating the humidifier using high quality water stored in the water tank, The temperature and humidity of the refrigerator can be automatically controlled by the refrigerator so that the refrigerator can be easily used and maintained and energy consumption can be minimized.

In addition, the present invention minimizes the heat generated in the evaporator and minimizes the heat applied to the stored product in the refrigerator when the compressor is restarted, thereby minimizing the loss of quality due to heat. So that the temperature deviation can be maintained within 0.5C at room temperature during the defrosting.

1 is a schematic view showing a conventional low temperature reservoir,
FIG. 2 is a schematic view illustrating a low-temperature refrigerator system using a sprinkling defibrillator according to an embodiment of the present invention, and FIG.
FIG. 3 is a schematic view illustrating a water spray evaporator unit of a low temperature refrigerator system using a sprinkling defibrillator according to an embodiment of the present invention, and FIG.
4 is a block diagram schematically showing an automatic control unit of a low temperature refrigerator system using a sprinkler defrost apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a low temperature refrigerator system using a sprinkling defibrillator according to the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that like elements in the drawings are represented by the same reference numerals as possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

2 is a schematic view showing a low-temperature refrigerator system using a sprinkling defibrillator according to an embodiment of the present invention, and FIG. 3 is a cross- FIG. 4 is a schematic view illustrating a water spray defrosting unit of a low temperature refrigerator system using a sprinkling defibrillator according to an embodiment of the present invention. FIG. 4 is a schematic view of a low temperature refrigerator system using a sprinkler defroster according to an embodiment of the present invention. Fig. 2 is a schematic diagram showing an automatic control unit; Fig.

As shown in FIGS. 2 to 4, the present invention includes a compressor 10 for compressing refrigerant gas into a high-temperature and high-pressure state, a condenser 10 for condensing the refrigerant compressed in the compressor into a liquid state by heat radiation by natural blowing of the cooling fan A filter 30 capable of removing foreign matter from the liquid refrigerant in the low-temperature and high-pressure state condensed in the condenser 20, a solenoid valve 40 used at the time of pump-down, and a side glass (50) and then expanding the refrigerant to a mixed refrigerant in a low-temperature and high-pressure state; and a heat exchanger for exchanging the refrigerant introduced from the expansion valve (60) with an external heat source, And the air blown by the blower is cooled by heat exchange using the latent heat of evaporation of the refrigerant while passing through the sprayer phase evaporator unit 70, And the receiver (80) for supplying a ulreo compressor 10, and includes an automatic control unit 90 to allow controlling the spray defrosting the evaporator unit (70).

The compressor 10 is a device for compressing a low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous state. The detailed structure of the compressor 10 is well-known and will not be described in detail. However, since the compressor 10 of the present invention uses a scroll compressor, a check valve 11 is additionally installed at one side of the compressor 10 to reduce noise and vibration generated due to the back flow of the refrigerant gas.

The condenser 20 is a device for performing heat exchange between the high-temperature refrigerant gas and the external heat source from the compressor 10 to change the condensation. The refrigerant is compressed by the compressor 10 to cool the high- So that it can be liquefied.

The expansion valve 60 transforms the refrigerant into a low-temperature and low-pressure humidified vapor state, that is, a mixed state of a liquid and a gaseous phase by introducing liquid refrigerant from the condenser 20 and expanding adiabatically, 60 may employ an expansion valve having a known structure, and thus a detailed description thereof will be omitted.

The sprayer phase evaporator unit 70 includes an evaporator 71 for exchanging the refrigerant introduced from the expansion valve 30 with an external heat source and an evaporator 71 located at an upper portion of the evaporator 71, A water tank 73 located below the evaporator 71 and capable of storing the water introduced from the water spraying defroster 72, A circulation motor 74 located at one side of the water tank 73 and capable of circulating the water stored in the water tank 73 as required; A humidifier 75 that can receive water and adjust the humidity of the refrigerator and a temperature and humidity sensor 76 that can measure the temperature and humidity inside the evaporator unit 70.

The evaporator 71 evaporates the expanded refrigerant introduced from the expansion valve 30 and uses the latent heat of evaporation of the refrigerant to allow the air blown to the outside to be cooled by heat exchange so that it becomes a low temperature vapor.

The water spraying and defoaming device 72 is disposed above the evaporator 71 and is designed to melt water or ice formed on the coil of the evaporator 71 by flowing water at a room temperature of 20 ° C into the evaporator 71, A plurality of discharge ports 723 are formed on the inside of the pipe pipe 721 so that water is discharged to the inside of the evaporator 71 as shown in FIG. So that it can be evenly sprayed. Since the water spraying and deflecting device 72 is located at a predetermined inclination, water can be prevented from remaining inside the pipe pipe 721, thereby preventing the water from being frozen by the evaporator 71.

The water tank 73 stores water discharged from the water spraying defroster 72 after defrosting the evaporator 71. Water is introduced into one side of the water tank 73 from the outside And a drain valve 732 for discharging the water stored in the water tank 73 to the outside. The water tank 73 is located inside the water tank 73, A high water level sensor 733 and a low water level sensor 734 capable of sensing the water level in the water tank 73, a temperature sensor 735 for measuring the temperature of the water stored in the water tank 73, 73) for heating the water stored therein.

When the low water level sensor 734 operates among the high water level sensor 733 and the low level water level sensor 734 for detecting the water level in the water tank 73, The power supply to the heater 736 is shut off and the water supply valve 731 is operated to supply water from the outside so as to fill the water tank 73. The high water level sensor 733 is supplied with a sufficient amount The water supply valve 731 can be automatically shut off.

When a large amount of water is suddenly supplied into the water tank 73 or when the stored water is contaminated and a dirty substance is detected, the drain valve 732 is automatically operated after a predetermined time, To be discharged to the outside.

In addition, when the temperature sensor 735 located inside the water tank 73 measures the temperature of the inflow water and is measured to be lower than the pre-input preset temperature, the heater 736 is always operated to raise the temperature of the water . At this time, the temperature of the water in the water tank 73 can be arbitrarily changed according to an external input, and the temperature of the water in the water tank 73 can be kept constant at approximately 20 ° C.

The circulation motor 74 is configured to supply the water stored in the water tank 73 to the water spraying defroster 72 so that the water supplied to the water spraying defroster 72 is discharged to the discharge port 723 at approximately 20 ° C, The evaporator 71 and the evaporator 71 are heated to a predetermined temperature.

The humidifier 75 is provided for controlling the humidity in the refrigerator. The humidifier 75 receives water from the water tank 73 and discharges fine water molecules by high-speed rotation when power is supplied to maintain humidity inside the refrigerator. .

The temperature and humidity sensor 76 can detect the temperature and the humidity of the low temperature refrigerator. When the temperature and humidity are lower than the set humidity, the humidifier 75 is operated to continuously generate humidity.

The receiver (80) temporarily stores the refrigerant gas to temporarily prevent excess liquid from flowing into the compressor (10).

The automatic control unit 90 includes a screen display unit 91 for displaying the temperature and humidity in the low temperature refrigerator and the water level in the water tank and a temperature control unit 92 for adjusting the temperature in the water tank 73 And a main power control unit 93 for automatically controlling each component in the water spraying evaporator unit 70.

The screen display unit 91 can display the temperature and humidity in the low temperature refrigerator and display the water level and the temperature of the water tank 73. For example, when the humidifier 75 is operated, water of at least 30% is always filled by the low-water level sensor 734 of the water tank 73 to interlock all the systems, and the high-water level sensor 733 ) Is displayed as EMPTY (empty) when it is 30% or less, FULL (full) when it is 90% or more is displayed. When EMPTY is displayed, the water supply valve 731 connected to the tap water supplied from the outside operates, The high water level sensor 733 in the water level sensor 733 is supplied until the FULL level is activated.

The temperature controller 92 controls the internal temperature of the water tank 73 displayed through the screen display unit 91 to be maintained at a predetermined temperature.

The main power control unit 93 monitors and controls all operating states of the low temperature refrigerator during operation and real time monitoring through the screen display unit 91. When a failure occurs in the low temperature refrigerator in the future, So that problems can be easily recognized, thereby enabling quick problem solving.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

10: compressor 20: condenser
30: Filter 40: Solenoid valve
50: side glass 60: expansion valve
70: Sprinkler defrost evaporator unit 80: Receiver
90: Automatic control unit

Claims (5)

A condenser (20) for condensing the refrigerant compressed in the compressor into a liquid state by heat radiation by natural blowing of the cooling fan, a condenser (20) for condensing the refrigerant in the condenser A filter 30 capable of removing foreign matter from a liquid refrigerant in a low temperature and high pressure state, a solenoid valve 40 used at the time of pump down, and a side glass 50 observing a refrigerant flow in that order, A sprinkler evaporator unit (70) including a sprinkling device for making a low temperature vapor phase by exchanging the refrigerant introduced from the expansion valve (60) with an external heat source; A receiver (80) for cooling the air blown by the blower by heat exchange using the latent heat of evaporation of the refrigerant while passing the defrost evaporator unit (70) and supplying the cooled air to the compressor (10) And an automatic control unit (90) for controlling the sprayer phase evaporator unit (70). The method according to claim 1,
The sprayer phase evaporator unit 70 includes an evaporator 71 for exchanging the refrigerant introduced from the expansion valve 30 with an external heat source and an evaporator 71 located at an upper portion of the evaporator 71, A water tank 73 located below the evaporator 71 and capable of storing the water introduced from the water spraying defroster 72, A circulation motor 74 located at one side of the water tank 73 and capable of circulating the water stored in the water tank 73 as required; A humidifier 75 that can receive water and adjust the humidity of the cold storage refrigerator and a temperature and humidity sensor 76 that can measure the temperature and humidity inside the water spray evaporator unit 70 Water spraying device Cryogenic refrigerator system. 3. The method of claim 2,
A plurality of discharge ports 723 are formed on the inside of the pipe pipe 721 so that the water is discharged from the evaporator 71 So that water can be prevented from remaining inside the pipe pipe (721) by forming the pipe pipe (721) to be inclined at a predetermined angle, so that the low temperature Refrigerator system. 3. The method of claim 2,
One side of the water tank 73 includes a water supply valve 731 for allowing water to flow in from the outside and a drain valve 732 for discharging water stored inside the water tank 73 to the outside A high water level sensor 733 and a low water level sensor 734 capable of sensing the water level in the water tank 73 and a water temperature sensor 734 for measuring the temperature of the water stored in the water tank 73 And a heater (736) for heating the water stored in the water tank (73). The refrigerator system of claim 7, wherein the temperature sensor (735) The method according to claim 1,
The automatic control unit 90 includes a screen display unit 91 for displaying the temperature and humidity in the low temperature refrigerator and the water level in the water tank and a temperature control unit 92 for adjusting the temperature in the water tank 73 And a main power control unit 93 for automatically controlling the respective components in the water spray evaporator unit 70. The low temperature refrigerator system according to claim 1,

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