KR101017347B1 - Drying, curing and cooling device for agricultural products - Google Patents

Abstract

PURPOSE: An agricultural product drying, curing, and freezing apparatus is provided to improve the stability of the apparatus using hot gas of a compressor when removing accumulated frost. CONSTITUTION: An agricultural product drying, curing, and freezing apparatus comprises the following: an outdoor unit including a compressor(111), a first refrigerant condensing coil(113), a second refrigerant condensing coil(114), and an evaporator(116). The compressor supplies hot gas with high temperature and pressure to an indoor unit, using a first refrigerant. The first refrigerant condensing coil condenses residues of hot gas discharged from the compressor. The evaporator heat-exchanges the first refrigerant and a second refrigerant.

Description

DRYING, CURING AND COOLING DEVICE FOR AGRICULTURAL PRODUCTS}

The present invention relates to agricultural product drying, curing and cooling apparatus, and more particularly to agricultural product drying, curing and cooling apparatus using a secondary refrigerant.

In general, agricultural products require drying, curing, cooling, and the like to maintain freshness.

Drying means removing moisture in the skin, root, and stem when harvesting root vegetables such as onions, sweet potatoes, potatoes, and garlic. Curing means a process of change that heals wounds in root vegetables protected by a thin epidermis in the ground before harvesting and improves self-protection. In this process, stable humidity and temperature must be maintained for continuous storage and continuous dehumidification must be carried out. Cooling means entering into a physiological dormant state for long-term storage of the produce.

 Conventional drying methods include natural drying, facility drying using simple facilities, and the natural drying has a problem that requires a lot of manpower and space constraints.

Conventional curing method is replaced by a drying process, an electric heat transfer method, there is a cooling dehumidification method using a freezer, etc. There is a problem that requires a lot of energy and ventilation amount, high facility cost and operating cost. In particular, the cooling dehumidification method using a freezer has a low discharge temperature of the cooler, there is a risk of cold damage to agricultural products, there is a problem that continuous operation is difficult due to the limit operation according to the temperature.

The conventional cooling method uses a direct expansion refrigerant that connects a freezer and an evaporator using a compressor. The refrigerator continues to operate when the desired temperature is reached and the solenoid valve of the freezer is closed by the temperature controller. (Pump down) is a problem that the operating temperature is lower than the set temperature, it is difficult to approach the optimum temperature, to maintain a stable temperature to prevent the low-temperature damage of agricultural products, to improve the discharge temperature below the set temperature, to approach the appropriate temperature There is a difficulty in the operation of the refrigerator, such as a problem of less cooling load. In order to solve this problem, the secondary refrigerant can be used, but it is impossible to control the temperature of the secondary refrigerant individually for each reservoir so that the secondary refrigerant can be stably supplied and cooled, and the facility cost is high and energy consumption is large. have.

The agricultural products that require drying, curing, and cooling among these products vary somewhat depending on the item, but this process must be performed to maintain the quality and improve the shelf life. There is a problem that you are experiencing.

Therefore, there is a need for the development of agricultural product drying, curing and cooling devices that can be easily performed regardless of items, weather, quantity, etc. by operating this process as one device in one place.

Accordingly, the problem to be solved by the present invention is to provide a agricultural product drying, curing and cooling apparatus that can be stably operated at a low cost as one apparatus in one place.

An agricultural product drying, curing and cooling apparatus according to an exemplary embodiment of the present invention includes an indoor unit disposed inside the agricultural product storage target that is to be dried, cured and cooled, and an outdoor unit disposed outside the agricultural product storage repository. . The outdoor unit is provided with a primary refrigerant to discharge hot gas of high temperature and high pressure to provide a portion to the indoor unit, a first primary refrigerant condensation to receive and condense the remaining amount except the portion of the hot gas discharged from the compressor A second primary refrigerant condensing coil and a primary refrigerant condensed from the first primary refrigerant condensing coil and the second primary refrigerant condensing coil to receive and condense a coil and hot gas recovered by circulation of the primary refrigerant in the indoor unit. And an evaporator for heat exchange of the secondary refrigerant. The indoor unit is provided with a secondary refrigerant from the outdoor unit to cool the inside of the agricultural product reservoir, and receives a primary gas in a hot gas state from the compressor of the outdoor unit to remove the enemy drop from the compressor and the compressor of the outdoor unit. And a reheat coil provided with a primary gas in a hot gas state to compensate for the temperature of the inside of the agricultural product reservoir.

In one embodiment, the outdoor unit is a storage tank for storing a secondary refrigerant for supplying to the cooling coil of the indoor unit, a recovery tank for receiving and storing the secondary refrigerant recovered from the cooling coil of the indoor unit unit and the shaft It may further include a secondary refrigerant tank disposed between the cold tank and the recovery tank, the secondary coolant tank comprising a separator separating the secondary refrigerant stored in the storage tank and the secondary refrigerant stored in the recovery tank. In addition, the outdoor unit may pump the secondary refrigerant stored in the recovery tank to provide the evaporator to the secondary refrigerant circulation pump for circulating the secondary refrigerant and the secondary refrigerant stored in the storage cooling tank to the indoor unit. It may further include a secondary refrigerant supply pump for supplying. The agricultural product drying, curing and cooling device may operate the secondary refrigerant supply pump when the temperature of the inside of the agricultural product reservoir is higher than a predetermined temperature, and the temperature of the secondary refrigerant stored in the storage tank is preliminary. The controller may operate the secondary refrigerant circulation pump when the temperature exceeds the set upper limit temperature, and stop the operation of the secondary refrigerant circulation pump when the temperature of the secondary refrigerant stored in the storage cooling tank becomes lower than the preset lower limit temperature. It may further include.

In an embodiment, the outdoor unit recovers and stores the primary refrigerant condensed in the first primary refrigerant condensation coil and the primary refrigerant condensed in the second primary refrigerant condensation coil, and provides the stored primary refrigerant to the evaporator. Refrigerant recovery vessel, receiving the primary refrigerant from the evaporator to separate the primary refrigerant in the liquid state that has not evaporated, and receives the liquid separator for providing the evaporated primary refrigerant to the compressor and the high temperature and high pressure hot gas discharged from the compressor After separating the oil may further include an oil separator for providing a hot gas from which the oil is separated to the indoor unit.

The reheat coil may be divided into at least two reheat coil headers so that at least two stages of control may be provided to receive the primary refrigerant in the hot gas state in at least two paths from the compressor of the outdoor unit.

In an embodiment, the indoor unit may define an external shape of the indoor unit and accommodate the cooling coil and the reheat coil in a space formed therein, and between an inner casing, an outer casing, and the inner casing and the outer casing. It may further include a casing including the disposed insulation.

According to the present invention, by the above configuration, the processes of drying, curing, cooling, de-cooling may be possible with one apparatus at one place regardless of the overall process, place, quantity, working method, outdoor air, etc. Hot gas from the compressor can be used for removal to improve the safety of the plant and save energy.

In addition, by applying the hot gas of the secondary refrigerant and heat pump method, stable temperature control and humidity control can be possible, and in parallel with the heat pump method, the facility cost and operating cost can be reduced by reducing the required power and energy. have.

1 is a block diagram of the agricultural product drying, curing and cooling apparatus according to an embodiment of the present invention.
FIG. 2 is a front view illustrating the outside of the outdoor unit of FIG. 1.
3 and 4 are exploded views for explaining the configuration of the outdoor unit of FIG.
5 is a front view illustrating the outside of the indoor unit of FIG. 1.
6 and 7 are exploded views for explaining the configuration of the outdoor unit of FIG.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a block diagram of the agricultural product drying, curing and cooling apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the agricultural product drying, curing and cooling apparatus 1000 according to an embodiment of the present invention includes an outdoor unit 100, an indoor unit 200, and refrigerant pipes.

The outdoor unit 100 and the indoor unit 200 are provided as separate devices. The outdoor unit 100 and the indoor unit 200 are connected by primary refrigerant pipes hp3 and mp4 and secondary refrigerant pipes bp5 and bp6, and the primary refrigerant pipes hp3 and mp4. Secondary refrigerant pipes bp5 and bp6 distribute the primary refrigerant and the secondary refrigerant, respectively.

The agricultural product drying, curing, and cooling device 1000 may further include a controller (DC) for controlling various components provided. The controller DC may be, for example, a digital controller.

2 is a front view illustrating the outside of the outdoor unit of FIG. 1, and FIGS. 3 and 4 are exploded views for explaining the configuration of the outdoor unit of FIG. 1. 3 is a view showing a compressor, an oil separator, a primary refrigerant recovery container, a suction gas liquid separator, a secondary refrigerant tank, and the like disposed in an outdoor unit, and FIG. 4 is a diagram of a first primary refrigerant condensation coil and a second primary unit disposed in an outdoor unit. A diagram showing a refrigerant condensation coil.

1 to 4, the outdoor unit 100 includes a compressor 111, an oil separator 112, a first primary refrigerant condensing coil 113, and a second primary refrigerant to form a circulation structure of the primary refrigerant. Condensation coil 114, the primary refrigerant recovery container 115, the plate evaporator 116 and the suction gas liquid separator 117.

The compressor 111 receives primary refrigerant to produce hot gas at high temperature and high pressure, and the produced hot gas is discharged through a pipe hp1.

The oil separator 112 receives the discharged hot gas at a high temperature and high pressure, separates the oil, and discharges the oil to a pipe (hp2). The hot gas passing through the pipe (hp2) reaches the three-way solenoid valve (SV1), the three-way solenoid valve (SV1) is the indoor unit unit 200 through the pipe (hp3) by a predetermined amount of hot gas To pass.

The circulation of the primary refrigerant delivered to the indoor unit 200 will be described later.

The first primary refrigerant condensation coil 113 receives a residual amount of hot gas that is not transferred from the three-way solenoid valve SV1 to the indoor unit 200 through a pipe hp3, through a pipe hp4. At this time, both sides of the first primary refrigerant condensation coil 113 is provided with a condensation coil header 113a.

The first primary refrigerant condensation coil 113 is heat-exchanged with the outside air by the blowing fan (CF1) disposed adjacent to, so that the hot gas is condensed into a liquid of medium temperature and high pressure.

The second primary refrigerant condensation coil 114 is a reheating / defrosting hot gas condensing coil, and the reheating hot gas delivered through the pipe (mp4) in accordance with the circulation of the primary refrigerant in the indoor unit 200 to be described later and Receive hot gas for recycling. The reheat / defrost hot gas is incompletely condensed, partly liquefied and partly uncondensed. At this time, both sides of the second primary refrigerant condensation coil 114 is provided with a condensation coil header (114a).

The second primary refrigerant condensation coil 114 is heat-exchanged with the outside air by the blowing fan (CF1) disposed adjacent to, so that the incompletely condensed hot gas is safely condensed into a liquid of medium temperature and high pressure.

As such, the outdoor unit 100 may condense the first primary refrigerant condensing coil 113 for condensing the hot gas discharged from the compressor 111 and the second primary refrigerant condensation for condensing the hot gas for reheating and defrosting. Since the coil 114 is separated and included, it is possible to prevent an abnormal phenomenon of the system due to excessive consumption of electrical energy of the conventional electric heat transfer method and unstable reheating and non-condensable gas of the heat pump method.

The primary refrigerant recovery container 115 recovers the liquid refrigerant condensed in the first primary refrigerant condensation coil 113 through a pipe (mp5), and the liquid condensed in the second primary refrigerant condensation coil 114. The refrigerant in the state is recovered through the pipe mp6.

The primary refrigerant in the liquid state recovered from the primary refrigerant recovery container 115 passes through the pipeline lp2 according to the opening and closing operation of the solenoid valve SV5 through the pipeline lp1, and throttles in the expansion valve EXV1. .

The plate type evaporator 116 is provided with a primary refrigerant via pipes lp1 and lp2, the solenoid valve SV5 and the expansion valve EXV1, and the secondary refrigerant introduced in the circulation of the secondary refrigerant, which will be described later. Heat exchange. The heat exchanged primary refrigerant cools the secondary refrigerant and evaporates itself by absorbing heat.

By using the plate evaporator 116, the disadvantage that the compressor has a surplus evaporation capacity at the time of refrigerant suction can be utilized to cool the secondary refrigerant in the plate evaporator 116, compared to the conventional compressor for secondary refrigerant cooling The operation time of 111 can be shortened.

The suction gas liquid separator 117 receives the evaporated primary refrigerant through a pipe lp3 to separate the primary refrigerant in the liquid state that is not evaporated. The primary refrigerant passing through the suction gas liquid separator 117 is again sucked into the compressor 111 through the pipe lp4.

The outdoor unit 100 includes a secondary refrigerant tank 118, a secondary refrigerant circulation pump 119, and a secondary refrigerant supply pump 120 to form a secondary refrigerant circulation structure.

The secondary refrigerant tank 118 may be, for example, a refrigeration brine tank. The secondary refrigerant tank 118 includes a cold storage tank BTa, a recovery tank BTb, and a separator plate BTc.

The storage tank BTa stores the secondary refrigerant for supplying the indoor unit 200.

The recovery tank BTb stores the secondary refrigerant used and recovered by the indoor unit 200.

The separator BTc is disposed between the storage tank BTa and the recovery tank BTb to insulate the secondary refrigerant stored in the storage tank BTa and the secondary refrigerant stored in the recovery tank BTb from each other. .

The secondary refrigerant circulation pump 119 pumps the secondary refrigerant stored in the recovery tank BTb to provide the plate type evaporator 116 through the pipes bp1 and bp2 to circulate the secondary refrigerant. The secondary refrigerant circulation pump 119 may operate according to an operation signal of the controller DC.

The secondary refrigerant supply pump 120 pumps the secondary refrigerant stored in the storage cooling tank BTa and supplies the secondary refrigerant to the indoor unit 200 through pipes bp4 and bp5. Specifically, the secondary refrigerant supply pump 120 is cooled by heat exchange with the primary refrigerant in the plate evaporator 116 to supply the secondary refrigerant stored in the storage tank BTa to the indoor unit 200. .

The secondary refrigerant supply pump 120 may operate according to an operation signal of the controller DC. In one embodiment, the indoor temperature sensor (T2) for detecting the indoor temperature of the agricultural product storage room in which the indoor unit 200 is installed, detects the indoor temperature of the storage and the detected temperature is input to the controller (DC). . The controller DC operates the secondary refrigerant supply pump 120 when the indoor temperature detected by the indoor temperature sensor T2 is higher than a preset temperature. Accordingly, the secondary refrigerant stored in the storage tank BTa may be introduced into the indoor unit 200 through the pipes bp4 and bp5.

A heat storage secondary coolant temperature sensor T4 may be inserted into the heat storage refrigeration tank BTa, and the heat storage secondary coolant temperature sensor T4 detects a temperature of the secondary refrigerant stored in the heat storage cooling tank BTa. A recovery secondary coolant temperature sensor T5 is inserted into the recovery tank BTb, and the recovery secondary coolant temperature sensor T5 detects a temperature of the secondary refrigerant stored in the recovery tank BTb.

When the predetermined temperature upper limit is detected by the secondary cooling temperature sensor T4, the controller DC outputs a signal to the secondary refrigerant circulation pump 119 and the secondary refrigerant circulation pump 119 operates. By the operation of the secondary refrigerant circulation pump 119, the secondary refrigerant stored in the recovery tank (BTb) is moved to the plate evaporator 116 through the pipes (bp1, bp2) and the plate evaporator 116 After cooling by heat exchange with the primary refrigerant in the pipe (bp3) is moved to the storage cold tank (BTa). This process may be automatically repeated to operate when the temperature of the secondary refrigerant sensed by the secondary cold storage temperature sensor T4 of the cold storage tank BTa reaches a preset temperature upper limit and stops when the preset temperature lower limit is reached.

Accordingly, when the secondary refrigerant supply pump 120 is stopped, the primary refrigerant existing in the cooling coil 211 of the indoor unit 200, which will be described later, is also stopped, thereby improving safety, and increasing the room temperature when the pump is down. The problem of lowering below the set temperature can be prevented. In addition, since the supply temperature of the secondary refrigerant can be maintained in an appropriate range, a problem of temperature deviation that may occur when cooling by using the primary refrigerant can be prevented, and it occurs in the cooling coil 211 of the indoor unit 200. It is possible to easily adjust the optimum temperature of the secondary refrigerant in consideration of the dew point temperature in order to easily defrost the defrosting.

The outdoor unit 100 may further include a casing C1. The casing C1 defines an external shape of the outdoor unit 100, and the components described above in the space formed therein, that is, the compressor 111, the oil separator 112, and the first primary refrigerant condensation. Coil 113, the second primary refrigerant condensation coil 114, the primary refrigerant recovery container 115, the plate evaporator 116, the suction gas liquid separator 117, the secondary refrigerant tank 118, the A secondary refrigerant circulation pump 119 and the secondary refrigerant supply pump 120 are accommodated.

5 is a front view illustrating the exterior of the indoor unit of FIG. 1, and FIGS. 6 and 7 are exploded views for explaining the configuration of the outdoor unit of FIG. 1. 6 and 7 show a left side view and a right side view, respectively, showing the detailed configuration of the indoor unit.

5 to 7, the indoor unit 200 includes a cooling coil 211 and a reheating coil 212.

The cooling coil 211 is a low-temperature secondary refrigerant supplied by the secondary refrigerant supply pump 120 from the storage cooling tank BTa of the outdoor unit 118, and a three-way solenoid valve of the outdoor unit 118 ( The primary refrigerant in the state of hot gas (reheat / defrosting hot gas) supplied in a predetermined amount by SV1 is provided. The secondary coil and the hot gas are supplied to the cooling coil 211 by being separated into a cooling coil header 211a and a defrosting coil header 211b so that the secondary refrigerant and the hot gas are not mixed with each other. The cooling coil 211 may be divided into a cooling coil and a defrosting coil to separate and distribute the secondary refrigerant and the hot gas.

The low temperature secondary refrigerant is supplied to the cooling coil 211 of the indoor unit 200 through the coil header 211a for cooling, and circulated by the blowing fan UF1 of the indoor unit 200. Cool down. The secondary coolant having cooled indoor air and having a raised temperature is recovered to the recovery tank BTb of the outdoor unit 100 through a pipe bp6.

As described above, the operation is performed when the temperature of the secondary refrigerant stored in the cold storage tank BTa sensed by the cold storage secondary coolant temperature sensor T4 of the cold storage tank BTa reaches a preset temperature upper limit, and the preset temperature is set. When the lower limit is reached, it can be automatically repeated to stop.

On the other hand, a part of the hot gas (reheat / defrosting hot gas) supplied through the pipe hp3 is utilized for defrosting. The defrosting hot gas may be guided to the cooling coil 211 through the defrosting coil header 211b, and may remove the drop formed in the cooling coil 211 by the heat of the induced hot gas. At this time, the opening and closing of the solenoid valve SV2 may be adjusted according to a signal of a predetermined defrost timer.

An incomplete condensation state in which part of the hot gas is condensed and part is not condensed due to heat exchange that occurs when removing the drop formed in the cooling coil 211 by the hot gas induced in the defrost coil header 211b. It becomes The incompletely condensed hot gas passes through a pipe mp4 past the check valve CHK1 and is supplied to the condensation coil header 114a of the outdoor unit 100.

According to the defrosting method as described above, it is possible to prevent the risk of high heat or electric leakage, which is a disadvantage of conventional defrosting by electric heater electrothermal.

The reheat coil 212 compensates for or raises the room temperature inside the agricultural product store cooled by heat exchange. The reheat coil 212 may operate in parallel with the operation of cooling the secondary refrigerant of the secondary refrigerant tank 118.

The reheat coil 212 receives a portion of the hot gas (reheat / defrost hot gas) supplied from the outdoor unit 118 for reheating. In this case, the reheat coil 212 is separated into two first reheat coil headers 212a and a second reheat coil header 212b in one embodiment, and reheat hot gas through pipes hp6 and hp7, respectively. Can be supplied.

In detail, the reheat coil 212 may be formed using the first reheat coil header 212a and the second reheat coil header 212b to ensure stability and to freely adjust the reheat load of the reheat coil 212. It can be separated into two paths to allow control of the steps.

A humidity sensor H1 is disposed in the agricultural product store, and the humidity sensor H1 senses humidity and inputs it to the controller DC. The controller DC may control the opening and closing of the solenoid valves SV3 and SV4 to supply the reheating hot gas to the reheating coil 212 in two paths. That is, the reheating hot gas may branch into the first reheating coil header 212a and the second reheating coil header 212b as necessary or may form only one path to exchange heat.

Thereafter, part of the reheating hot gas is liquefied and part is incompletely condensed without condensation. The incompletely condensed hot gas passes through the check valves CHK2 and CHK3, passes through the pipe mp4, and moves to the condensation coil header 114a in the outdoor unit 100.

In the reheating method as described above, the cooling coil of the indoor unit 200 to artificially discharge some of the absolute humidity, that is, the total amount of water, contained in the air and the produce in the produce storage to the outside of the produce storage. The dew point temperature of 211) can be derived.

According to the reheating method as described above, it is possible to prevent the risk of high heat or electric leakage, which is a disadvantage of reheating by the conventional electric heater electric heat. In addition, since the reheating device 212 for compensating or raising the indoor temperature inside the agricultural product store cooled by heat exchange using only a heat source of hot gas discharged from the compressor 111 without a separate heat source may be more efficient than in the related art. have.

The indoor unit 200 may further include a casing C2. The casing C2 defines an external shape of the indoor unit 200, and accommodates the cooling coil 211 and the reheat coil 212 in a space formed therein.

The casing C2 of the indoor unit 200 may include an inner casing C2a, an outer casing C2b, and an insulation material IS disposed between the inner casing C2a and the outer casing C2b. .

The insulation IS may prevent condensation that may occur on the surface of the casing C2 of the indoor unit 200 due to a temperature difference between the inside and the outside of the indoor unit 200 during reheating or defrosting.

As described above, when the secondary refrigerant supply pump 120 stops, the primary refrigerant existing in the cooling coil 211 of the indoor unit 200 may also be stopped, thereby improving safety. In addition, since the supply temperature of the secondary refrigerant can be maintained in an appropriate range, a problem of temperature deviation that may occur when cooling by using the primary refrigerant can be prevented, and a problem that the indoor temperature falls below the set temperature due to the pump down occurs This can be prevented. In addition, it is possible to easily adjust the optimum temperature of the secondary refrigerant in consideration of the dew point temperature in order to be able to easily defrost the drip generated in the cooling coil 211 of the indoor unit 200.

In addition, according to the defrosting method as described above, it is possible to prevent the risk of high heat or electrical leakage, which is a disadvantage of conventional defrosting by electric heater electrothermal. In addition, in the conventional simple hot gas defrosting method, as described above, the compressor has a surplus evaporation capacity when the refrigerant is sucked in, so that the secondary refrigerant is cooled in the plate evaporator 116 and moved to the storage cooling tank BTa. It can be utilized to reduce the operating time of the compressor 111 for the secondary refrigerant cooling as compared to the conventional, it is possible to double the energy efficiently.

In addition, the outdoor unit 100 may condense the first primary refrigerant condensing coil 113 for condensing the hot gas discharged from the compressor 111 and the second primary refrigerant condensing coil for condensing the hot gas for reheating and defrosting. Since the 114 is separated and included, it is possible to prevent the excessive electric energy consumption of the conventional electric heat transfer method and the abnormal phenomenon of the system due to unstable reheating and non-condensable gas of the heat pump method.

In addition, according to the reheating method as described above, it is possible to prevent the risk of high heat or electric leakage, which is a disadvantage of the reheating by the conventional electric heater electric heat. In addition, since the reheating device 212 for compensating or raising the indoor temperature inside the agricultural product store cooled by heat exchange using only a heat source of hot gas discharged from the compressor 111 without a separate heat source may be more efficient than in the related art. have.

In addition, the cooling coil 211 and the reheat coil 212 is configured separately, the first primary refrigerant condensation coil (exhaust gas condensation coil) 113 and the second primary refrigerant condensation coil (reheat / re-heat hot By separately configuring the gas condensation coil (114), in the conventional simple hot gas reheating method, it is possible to solve the problem that the indoor unit unit 200 is not recovered to the refrigerant recovery container due to the high pressure of the noncondensing gas. In addition, since the cooling temperature and the reheat temperature can be freely adjusted using the secondary refrigerant, cooling and reheating can be easily performed simultaneously.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Therefore, the above description and the drawings below should be construed as illustrating the present invention, not limiting the technical spirit of the present invention.

100: outdoor unit unit 111: compressor
112: oil separator 113: first primary refrigerant condensing coil
114: second primary refrigerant condensing coil 115: primary refrigerant recovery container
116: plate evaporator 117: suction gas liquid separator
118: secondary refrigerant tank 119: secondary refrigerant circulation pump
120: secondary refrigerant supply pump 200: indoor unit
211 cooling coil 212 reheating coil
1000: produce drying, curing and cooling device

Claims (7)

In the agricultural product drying, curing and cooling device comprising an indoor unit disposed inside the agricultural product storage target of drying, curing and cooling and an outdoor unit disposed outside the agricultural product storage,
The outdoor unit,
A compressor provided with primary refrigerant to discharge hot gas at a high temperature and high pressure to provide a portion to the indoor unit;
A first primary refrigerant condensation coil configured to receive and condense the remaining amount of the hot gas discharged from the compressor except the portion;
A second primary refrigerant condensing coil configured to receive and condense hot gas recovered by circulation of the primary refrigerant in the indoor unit; And
And an evaporator configured to heat exchange the primary refrigerant and the secondary refrigerant condensed from the first primary refrigerant condensation coil and the second primary refrigerant condensation coil,
The indoor unit is,
A cooling coil provided with a secondary refrigerant from the outdoor unit to cool the inside of the agricultural product storage, and receiving a primary gas in a hot gas state from a compressor of the outdoor unit to remove the drop; And
And a reheating coil provided with a primary gas in a hot gas state from the compressor of the outdoor unit to compensate for the temperature of the inside of the agricultural product reservoir. According to claim 1, The outdoor unit,
A storage cooling tank storing secondary refrigerant for supplying a cooling coil of the indoor unit;
A recovery tank for receiving and storing the secondary refrigerant used and recovered by the cooling coil of the indoor unit; And
And a secondary refrigerant tank disposed between the storage tank and the recovery tank, the secondary refrigerant tank including a separator separating the secondary refrigerant stored in the storage tank and the secondary refrigerant stored in the recovery tank from each other. Ring and cooling unit. According to claim 2, The outdoor unit is,
A second refrigerant circulating pump for pumping the second refrigerant stored in the recovery tank to provide the evaporator to circulate the second refrigerant; And
Agricultural product drying, curing and cooling device further comprises a secondary refrigerant supply pump for pumping the secondary refrigerant stored in the cold storage tank to supply to the indoor unit. The method of claim 3,
The secondary refrigerant supply pump is operated when the temperature of the inside of the agricultural product reservoir is higher than the preset temperature,
When the secondary refrigerant circulation pump is operated when the temperature of the secondary refrigerant stored in the storage tank is higher than the preset upper limit temperature, and the temperature of the secondary refrigerant stored in the storage refrigeration tank is lower than the preset lower limit temperature. And a controller configured to stop the operation of the secondary refrigerant circulation pump. According to claim 1, The outdoor unit,
A primary refrigerant recovery container for recovering and storing the primary refrigerant condensed in the first primary refrigerant condensation coil and the primary refrigerant condensed in the second primary refrigerant condensation coil, and providing the stored primary refrigerant to the evaporator;
A liquid separator receiving primary refrigerant from the evaporator to separate primary refrigerant in a liquid state that has not been evaporated and providing the primary refrigerant to the compressor; And
Agricultural oil drying, curing and cooling apparatus further comprises an oil separator for receiving the hot gas of the high temperature and high pressure discharged from the compressor to separate the oil and provide the separated hot gas to the indoor unit. The method of claim 1, wherein the reheating coil is divided into at least two reheating coil headers to enable at least two stages of control so that the primary refrigerant in the hot gas state is provided in at least two paths from the compressor of the outdoor unit. Agricultural product drying, curing and cooling device. According to claim 1, The indoor unit is,
Define the outer shape of the indoor unit and accommodate the cooling coil and the reheat coil in a space formed therein,
And a casing comprising an inner casing, an outer casing, and an insulation disposed between the inner casing and the outer casing.

Images