KR20190088139A - Humidity eliminate drier for agricultural and marine products - Google Patents

Abstract

The present invention relates to a dehumidification-type dryer for agricultural and marine products. The dehumidification-type dryer comprises: a drying room (10) provided with an internal space in which trays (13) containing agricultural and marine products are stacked, and including an air-blowing path (100) in an upper portion thereof while being spaced apart from the ceiling thereof; a dehumidification chamber (20) configured to cool and liquefy steam generated from drying the agricultural and marine products in the drying room (10), thereby eliminating humidity; a compressor configured to compress a refrigerant having passed through the dehumidification chamber (20); an indoor radiator (52) provided with an indoor motor fan (51) to heat inside air by discharging heat from the refrigerant having passed through the compressor (40); and an outdoor radiator (50) equipped with an outdoor motor fan (53) to discharge the heat of the refrigerant to the atmosphere, as necessary. In particular, the humidification chambers (20) containing dehumidification coils are spaced apart from each other so as to stand unaffected by air flows inside the drying room; the indoor motor fan (51) of the indoor radiator (52) creates a sufficient air volume required for condensation, and an exhaust fan (30) of the dehumidification chamber (20) arbitrarily regulates the air volume so as to keep, as large as possible, a temperature difference (Δt) between the surface temperature of the dehumidification coils and the air inside the drying room, and decreases the surface temperature of an evaporator to enable dehumidification of air with low dew point temperature.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a drier for agricultural and marine products,

[0001] The present invention relates to a wet-type agricultural and marine products dryer, and more particularly, to a drying machine for a wet-type agricultural and marine products dryer, which comprises a heat pump for applying heat to a drying chamber, Is evaporated and the air containing the vaporized vapor is passed through the surface of the evaporator coil (corresponding to the evaporator) cooled to below the dew point temperature to cool the passing air, and the relative humidity of the air to circulate the water vapor is discharged continuously And drying the dried material by dropping.

One of them is located inside the drying chamber (referred to as an indoor radiator) and one is located outside the drying chamber (referred to as an outdoor radiator) so that the internal temperature of the drying is set to a set temperature The indoor motor fan of the indoor heat radiator is stopped and the outdoor motor fan of the outdoor heat radiator is operated to discharge the heat of the outdoor heat radiator to the atmosphere. In this process, when the temperature of the drying room is lower than the set temperature, And the outdoor motor fan of the indoor heat radiator is operated to radiate the heat of the indoor heat radiator to raise the temperature of the drying room.

In general, agricultural products such as pepper, mushroom, and ginseng, and herbal medicines are mostly dried to prevent deterioration in the sale or distribution process and to preserve them for a long time. Drying methods such as agricultural products and herbal medicines depend on sunlight or shade, Or a method of artificially drying using a dryer equipped with a burner or an electric heater.

In the above, the method of natural drying depending on the sunlight or the shade is the most preferable drying method considering the merchantability, or it is affected by the weather change and takes a long time to dry, and the work is troublesome and requires a lot of manpower. An artificial method is used.

Conventionally, the dryer is configured to generate hot air at a high temperature by using an electric heater or a burner, circulate the hot air to a drying room in which agricultural products and herbal medicines are placed, and circulate the hot air to evaporate moisture contained in agricultural products or herbal medicines. The generated steam can not be completely removed and mixed with the hot air and circulated. As a result, there is a problem that the circulating air is hot and humid and the drying efficiency is low and the heat loss is increased.

That is, hot air heated by an electric heater or a burner is supplied to the drying chamber to circulate, and the moisture contained in agricultural products or medicinal materials is evaporated to dryness, then heated again, and then recirculated to the drying chamber, The drying efficiency is lowered. When hot air mixed with water vapor is exhausted to the outside, there is a problem in that heat loss is generated and drying cost is increased because external air having a relatively low temperature is sucked.

In recent years, there has been proposed a wet-type dryer in which a heat pump system is applied to reduce the drying cost and improve the commerciality of agricultural products or herbal medicines. The wet-type dryer includes an evaporator, a compressor, a condenser and an expansion valve A heat pump system in which a heat of a refrigerant is discharged from a condenser to warm air circulated to a drying chamber, and water vapor generated by the drying process in a drying chamber is liquefied in an evaporator to remove water. Japanese Patent Application No. 1020080021105 ) Was proposed.

In the wet-type dryer proposed in the prior art, the internal air circulated to the drying chamber is heated by using the heat of the refrigerant discharged from the condenser of the heat pump, and the water vapor generated in the drying process in the drying chamber is discharged to the evaporator The air is cooled and liquefied to remove moisture. However, since the air can not sufficiently be dehumidified due to an excessive amount of air, the drying efficiency is low because the air is recirculated to the drying chamber.

Since the heat of the refrigerant discharged from the condenser is used as a heat source for warming the hot air circulated in the drying chamber, the temperature of the hot air is relatively low, so that agricultural or herbal medicines containing a large amount of moisture take a long time to dry.

In addition, since the above-described prior art is aimed at a dryer, there is a disadvantage that the function of the low-temperature warehouse can not be performed.

In a typical farmhouse, when the crop harvesting season is over, a dryer is unnecessary. Therefore, if dryer is not used, it should be available as low-temperature warehouse.

The present invention has been devised in consideration of this.

In the conventional wet type dryer, a ventilation hole of a condenser and an evaporator are connected in series to pass the same amount of air through a single fan. In this case, the amount of air passing through the condenser necessarily exceeds a certain amount But

In the case of an evaporator, the amount of air passing through is excessive, so most of the energy is used to cool the air (sensible heat) and the energy required for condensation of water vapor (latent heat) that we need is lowered.

In this case, the energy injected into the evaporator is divided into the part used to cool the air passing through the evaporator (this is called sensible heat) and the part used to liquefy the water vapor contained in the air (this is called latent heat). And only the latent heat is generated, and the temperature of the air cooled by the sensible heat is reheated in the condenser, so that the sensible heat and the reheating are only wasted energy. Therefore, there is an urgent need to reduce the sensible heat ratio (sensible heat ratio) and increase the latent heat ratio (latent heat ratio).

In general, the temperature of the dehumidifier is about 10-15 degrees Celsius lower than the dehumidification room temperature because the sensible heat ratio is higher than necessary due to a large amount of air passing through the general cooling dehumidifier, so that it is difficult to maintain the dew point temperature of less than 30% It has limitations.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a method and a device for drying a product such as agricultural and marine products by heating a circulating air from a heat radiator (condenser) The present invention also provides a technique for performing a dehumidification process by mixing water vapor with air in a drying chamber by cooling and liquefying water vapor generated in a drying process in a dehumidification chamber performing a cooling action,

Especially, it has two radiators (indoor radiator and outdoor radiator), one is located inside the drying room and the other is located outside the drying room. When the inside temperature of the drying reaches the set temperature, the indoor fan of the indoor radiator is stopped The outdoor fan of the outdoor heat radiator is operated to discharge the heat of the outdoor heat radiator to the atmosphere,

In this process, when the temperature of the drying chamber is lower than the set temperature, the outdoor motor fan of the outdoor radiator is stopped and the outdoor motor fan of the indoor radiator is operated to radiate the heat of the indoor radiator to raise the temperature of the drying room.

The dehumidifying chamber 20 is installed in a separate place which is not disturbed by the flow of the main air inside the drying chamber by the coil of the indoor radiator 52 and the circulating fan 90, 51 of the dehumidifying chamber 20 has a sufficient amount of air necessary for condensation and as a separate control space in the case of the dehumidifying chamber 20, the amount of refrigerant circulated through the discharge fan 30 and the amount of expansion of the refrigerant is arbitrarily adjusted, And the temperature of the evaporator is lowered so that the air having a low dew point temperature can be dehumidified.

Referring to the accompanying drawings,

The main constitution of the construction and dehumidification agricultural product drying chamber 100 will be described.

A drying chamber 10 provided with an internal space in which a tray 13 containing agricultural and marine products is stacked and an air passage 100 separated from the ceiling at an upper side thereof and a drying chamber 10 for cooling water vapor generated in drying the agricultural and marine products in the drying chamber 10 A dehumidifying chamber 20 for liquefying and removing moisture,

A compressor 40 for compressing the refrigerant passed through the dehumidifying chamber 20 and an indoor radiator 51 for radiating the heat of the refrigerant passed through the compressor 40 to warm the inside air, (52)

And an outdoor radiator 50 equipped with an outdoor motor fan 53 for discharging the heat of the refrigerant to the atmosphere as required,

The dehumidification chamber 20 in which the discharge fan 30 continuously controlled by the surface temperature of the dehumidifying coil continuously operates is constructed such that when the steam generated in the drying process of the agricultural product or the herbal medicine contained in the tray 13 passes through the drying chamber 10 When the temperature of the drying chamber (10) is lower than the set temperature, the indoor fan (51) is operated to blow the warm air of the indoor radiator (52) to the drying room 10 is warmed up and the temperature of the drying chamber 10 is higher than the set temperature, the operation of the indoor motor fan 51 is stopped and the outdoor motor fan 53 is operated to blow the warm air of the outdoor heat radiator 53 And the heat of the outdoor radiator (53) is heated to the atmosphere.

Reference numeral 200 denotes a low-temperature warehouse.

The dehumidifying chamber 20 in which the dehumidifying coil is installed is spaced from the dehumidifying chamber 20 so that the dehumidifying chamber 20 is not disturbed by the air flow inside the drying chamber 52. The indoor fan 51 of the indoor heat spreader 52 is condensed And the air flow rate of the discharge fan 30 of the dehumidification chamber 20 is arbitrarily adjusted to keep the temperature difference Δt with the air in the drying room as large as possible and to lower the surface temperature of the evaporator to a low dew point temperature Of the air is also dehumidified.

Specifically, when the dehumidifying coil temperature of the dehumidifying chamber 20 is higher than the set temperature, the discharge fan 30 of the dehumidifying chamber 20 is stopped or operated at a low speed to lower the surface temperature of the dehumidifying coil 20, And the indoor wind of the indoor motor fan 51 is passed through the dehumidifying coil of the dehumidifying chamber 20 to perform dehumidification.

When the dehumidification coil temperature of the dehumidification chamber 20 is lower than the set temperature, the number of rotations of the discharge fan 30 of the dehumidification chamber 20 is increased to raise the coil temperature so that no deformation occurs, and the dehumidification is steadily performed.

As described above, a heat pump is applied to the drying chamber to heat the air circulating from the radiator (condenser), which radiates the heat of the refrigerant, to the drying chamber to dry agricultural and marine products and the like, The present invention provides a technique for cooling and liquefying water vapor generated during a process to remove moisture to perform a dehumidification process,

In particular, when the indoor temperature of the indoor unit reaches a set temperature, the indoor fan of the indoor heat radiator is stopped, and the outdoor fan of the outdoor heat radiator is operated to discharge the heat of the outdoor heat radiator to the atmosphere,

In this process, when the temperature of the drying chamber is lower than the set temperature, the outdoor motor fan of the outdoor radiator is stopped and the outdoor motor fan of the indoor radiator is operated to radiate the heat of the indoor radiator, thereby raising the temperature of the drying room.

There is an advantage that a high temperature can be maintained while maintaining the internal set temperature of the drying chamber. This results in high drying efficiency.

When the amount of physical dehumidification is decreased due to the lowering of the relative humidity of the drying room, the amount of refrigerant circulation can be reduced by using the temperature sensitive expansion valve to reduce energy consumption Lt; / RTI >

By lowering the surface temperature of the evaporator extremely, it is possible to dehumidify air with a low dew point temperature, so that a high degree of drying can be achieved.

FIG. 1 is a perspective view of a wet-type agricultural water drier according to the present invention,
FIG. 2 is a front view in the state of FIG. 1,
B) is a perspective view.
FIG. 3 is a front view of another embodiment of the wet laver according to the present invention; FIG.

The present invention will now be described in detail with reference to the accompanying drawings.

In the embodiment of the present invention, since the heat pump is applied to the dryer, the heat of the refrigerant is discharged from the radiator to heat the air circulated to the drying chamber to dry the agricultural and marine products, while steam generated in the drying process in the drying chamber is cooled And the air circulation in the drying chamber is smoothly performed throughout the drying chamber so that the drying of agricultural and marine products can be effectively performed.

The wet type agricultural product dryer 100 according to the embodiment of the present invention applies a heat pump system having a dehumidifying chamber 20, a compressor 40 and a radiator 50 expansion valve as main components, The compressor 40 compresses the refrigerant passed through the dehumidification chamber 20 at a high temperature and a high pressure and the radiator 50 compresses the refrigerant discharged from the compressor The expansion valve (not shown in the figure) lowers the refrigerant passed through the radiator 50 to the low temperature and low pressure and circulates the refrigerant to the dehumidification chamber 20 Function.

The dehumidifying chamber 20 for performing a cooling function in the heat pump system is a device which is partitioned in the drying chamber 10 so as to be positioned on the upper side of the drying chamber 10 so as not to be disturbed by the air flow inside the drying chamber, A drain pipe (not shown) is connected to the outside of the drying chamber 10 so as to discharge the liquefied water through the cooling action, or to be installed outside the drying chamber through a vent which can be mixed with air in the drying chamber do.

The dehumidification chamber 20 is configured to cool and liquefy the water vapor generated in the drying process of agricultural products or medicinal materials contained in the tray 13 in the drying chamber 10 to remove moisture in the circulation air to perform dehumidification, The collected water is discharged to the outside of the drying chamber 10 through a drain pipe.

In the above, the blowing fan 90 is a function for forcibly circulating the air in the drying chamber 10, and a strong suction force and a wind-blowing force act so that the inside air of the drying chamber 10 is heated from the upper portion through the indoor condenser, (10) and through the air passage (100) into the drying chamber (10).

In the heat pump system, the compressor (40) for compressing the refrigerant passing through the dehumidification chamber (20) at a high temperature and a high pressure is preferably installed on the bottom surface of the device space partitioned on one side of the drying chamber (10) It is acceptable to install it so that there is no obstacle in the process.

On the other hand, in the heat pump system, the heat radiator (50)

(40) is installed across the lower part of the device space partitioned by the drying chamber (10) so as to be located at one side of the lower side of the indoor unit (10) and discharges the heat of the refrigerant compressed at high temperature and high pressure to the outside, Allow to warm.

Since the radiator 50 discharges the heat of the refrigerant to the outside, when the air inside the drying chamber 10 is blown to the bottom surface space of the drying chamber 10 through the blowing fan 90, the heat is transmitted through the radiator 50, So that the circulating internal air is warmed.

Therefore, in the heat pump system applied to the dryer 10 according to the embodiment of the present invention, the dehumidification is performed by liquefying the water vapor by the cooling action of the refrigerant in the dehumidification chamber 20, and the heat of the refrigerant is discharged to the outside And the internal air circulated to the drying chamber 10 is heated to dry the agricultural and marine products.

Hereinafter, the main structure of the wet-lawn agricultural drying chamber 100 according to another embodiment of the present invention will be described.

A drying chamber 10 provided with an internal space in which a tray 13 containing agricultural and marine products is stacked and an air passage 100 separated from the ceiling at an upper side thereof and a drying chamber 10 for cooling water vapor generated in drying the agricultural and marine products in the drying chamber 10 A dehumidifying chamber 20 for liquefying and removing moisture,

A compressor (40) for compressing the refrigerant passed through the dehumidification chamber (20)

There is an indoor radiator 52 equipped with an indoor motor fan 51 for radiating the heat of the refrigerant passed through the compressor 40 to warm the inside air

And an outdoor radiator 50 equipped with an outdoor motor fan 53 for discharging the heat of the refrigerant to the atmosphere as required,

The dehumidification chamber 20 in which the blowing fan 30 is controlled arbitrarily can cool and liquefy the water vapor generated in the drying process of agricultural products or medicinal materials contained in the tray 13 in the drying chamber 10, In the process of removing dehumidification

When the temperature of the drying chamber 10 is lower than the set temperature, the indoor fan 51 is operated to blow the warm air of the indoor radiator 52 to warm the inside temperature of the drying chamber 10, Occation,

The operation of the indoor motor fan 51 is stopped and the outdoor motor fan 53 is operated to blow the warm air of the outdoor heat radiator 53 to generate heat of the outdoor heat radiator 53 to the atmosphere.

The reason for this is that by using two radiators, the internal set temperature of the drying chamber can be maintained, and the drying time can be shortened by maintaining the high temperature according to the heating.

For example, when the drying room temperature is 30 ° C or higher, the air temperature in the drying room is high, and the dehumidification efficiency is low. At this point, it is preferable to maintain the temperature in the range of 25 캜 to 30 캜.

Finally, supplements the explanation, A dehumidifier is installed at a proper position in the drying chamber which does not greatly affect the circulating air flow inside the dryer. The feature of this dehumidifier is that the heat transfer area of the dehumidifying coil is 30 ~ 50%, and the air flow passing through it is controlled correspondingly, so that the surface temperature of the coil is lowered to maximize the temperature difference (Δt) with the air inside the drying chamber, thereby lowering the condensation temperature of the steam, thereby increasing the latent heat ratio among the energy absorbed by the dehumidifier .

 In addition, the relative humidity inside the drying chamber decreases over time, and the amount of water vapor condensed in the dehumidifier is also reduced, thereby reducing the energy required for drying. In this case, since the degree of superheat of the refrigerant at the outlet of the dehumidifying coil becomes low,

A temperature sensitive expansion valve is installed at the outlet of the dehumidifying coil to reduce the amount of circulating refrigerant, thereby reducing energy consumption.

10: Drying room 13: Tissue
20: Dehumidification chamber 40: Compressor
50: Heat generator 51: Indoor motor fan
52: indoor radiator 100: dryer

Claims (1)

A drying chamber 10 provided with an internal space in which a tray 13 containing agricultural and marine products is stacked and an air passage 100 separated from the ceiling at an upper side thereof and a drying chamber 10 for cooling water vapor generated in drying the agricultural and marine products in the drying chamber 10 A dehumidifying chamber 20 for liquefying and removing moisture,

A compressor 40 for compressing the refrigerant passed through the dehumidifying chamber 20 and an indoor radiator 51 for radiating the heat of the refrigerant passed through the compressor 40 to heat the indoor air, (52)
There is an outdoor radiator 50 equipped with an outdoor motor fan 53 for discharging the heat of the refrigerant to the atmosphere as required,

The dehumidifying chamber 20 in which the dehumidifying coil is installed is spaced apart from the indoor heat radiator 52 so as not to be disturbed by the air flow inside the drying chamber, and the indoor fan 51 of the indoor radiator 52 has a sufficient air volume And the temperature difference Δt between the surface temperature of the dehumidifying coil and the air in the drying chamber is maximized by adjusting the air flow rate in the case of the discharge fan 30 of the dehumidification chamber 20, Characterized in that it is capable of dehumidifying the air of temperature.

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