KR102133676B1 - Hot-water production apparatus - Google Patents

Abstract

The present invention relates to a cold air dryer capable of maintaining a low temperature by a double refrigeration cycle, which actively improves an existing method in which it was impossible to maintain low temperature drying for a long time as temperature control was limited due to the frost of an expansion valve, and secures a defrost time of the inactive expansion valve due to the way in which expansion sides divided from the expansion valve can alternately operate, so that a liquid refrigerant is continuously evaporated to maintain a uniform low temperature condition of a drying chamber. The cold air dryer comprises: the drying chamber (10) partitioned by a partition wall (S) to accommodate an object to be dried; a machine room (20) for generating and supplying continuous cold air into the drying room; a refrigerator (100) which is stacked on an upper portion of the drying chamber (10) and has a compressor and a condenser embedded therein to generate the liquid refrigerant by bring a refrigerant generated in a high-temperature and high-pressure state in contact with outside air; the expansion valve (200) connected to the refrigerator, and transferring the liquid refrigerant in the high pressure state to an evaporator while changing the high pressure state into a low pressure state using a capillary principle; and the evaporator (300) installed inside the machine room (20), and connected to the expansion valve to receive a low-temperature and low-pressure liquid refrigerant while absorbing heat through exchange with the outside air so that the liquid refrigerant is evaporated in a gas state and cold air is generated. The above expansion valve (200) is divided into a first expansion side (210) and a second expansion side (220) to be formed separately. The first and second expansion sides (210, 220) are operated alternately to ensure a defrosting time of the inactive expansion side. The liquid refrigerant is evaporated continuously from the secured defrosting time, so that dehumidification is performed while maintaining the interior of the drying room at a low temperature of 0°C or less for a long time.

Description

Cold-air dryer capable of maintaining low temperature by double refrigeration cycle {Hot-water production apparatus}

The present invention is a related technical idea of a cold air dryer for producing a high-quality dry matter while inducing minimization of changes in components of an object to be dried, and more specifically, it is impossible to maintain a low-temperature drying for a long time while the temperature control is limited by dropping of an expansion valve. It is configured to maintain the low temperature condition of the drying chamber by evaporating liquid refrigerant continuously by securing the defrosting time of the non-operating expansion valve due to the way that the expansion valves bisected with each other are improved by actively improving the existing method. It relates to a cold air dryer capable of maintaining a low temperature by a double refrigeration cycle.

In general, the drying apparatus mainly uses a method of drying by providing hot air. However, the method of drying by heat takes a long drying time and a lot of power accordingly, and thus not only has a considerable cost, but also has a fatal problem in that taste and quality are deteriorated, such as high temperature heat rapidly evaporating moisture from the dried object and destroying nutrients. Is effected.

For the same reason as described above, in recent years, a variety of cold air drying devices capable of actively preserving the nutrients and forms of an object to be dried have been proposed.

On the other hand, as an example of a cold air dryer, the public utility model No. 20-2017-0000522 "Cold Air Dryer" is published, and the technology includes three coils that perform dehumidification and heat removal functions in the cold air dryer. Through operation, the coils perform re-humidification and re-heating according to the situation inside the drying room, and reheating and dehumidifying from low to high temperature only by the dryer itself without a separate auxiliary heat source prevents generation of frost, thereby drying the object to be dried smoothly. Related.

Another example of a cold air dryer is published "Patent air dryer" No. 10-2008-0021105, the technology connects between the discharge side of the compressor and the suction side of the evaporator, but is selectively selected according to the suction side pressure on the path. It is a technology that operates without dropping of the evaporator even at low temperatures by including a bypass pipe equipped with an external pilot-type pressure regulating valve.

However, common cold air dryers, including the "Private Utility Model Publication No. 20-2017-0000522", "Cold Air Dryers," have limited temperature control due to dripping of the evaporator coil, making it difficult to maintain a low temperature environment for a long time.

In addition, in the above-mentioned Patent Publication No. 10-2008-0021105 "Cold air dryer", it is possible to prevent a dropping phenomenon by a bypass pipe equipped with an external pilot type pressure regulating valve, but this closes the pressure regulating valve for defrosting. Since the production and supply of cold air is stopped for a period of time, the inside of the drying chamber cannot be kept constant.

As a result, as the production and supply of cold air continues, there is an urgent need for a technology that can maintain the drying chamber at a constant temperature condition at all times and completely solve the problem of dripping on the expansion valve during the process of producing cold air.

Republic of Korea Utility Model Publication No. 20-2017-0000522 "Cold air dryer" Republic of Korea Patent Publication No. 10-2008-0021105 "cold air dryer"

The present invention was created in order to more actively solve the above problems. As the temperature control of the cold air dryer is limited due to the occurrence of redundancy in the expansion valve during long-time operation, the internal temperature of the drying chamber is lowered to 15° C. or lower, or to a low temperature state. Unlike the existing ones that could not be maintained, while the production and supply of cold air continues, the temperature of the drying chamber is maintained at constant conditions at all times, and a cold air dryer is provided to completely solve the problem of inflation caused by the expansion valve during the process of producing cold air. This is the task to be solved.

In order to achieve the above problem, the configuration of the cold air dryer 1 capable of maintaining a low temperature by a double refrigeration cycle proposed in the present invention is as follows.

The cold air dryer (1) of the present invention includes a drying chamber (10) partitioned by a partition wall (S) to receive a large amount of an object to be dried; And a machine room (20) for generating cold air to be supplied to the drying room, and installed on top of the drying room (10), built-in a compressor and a condenser to contact the refrigerant generated in a high temperature and high pressure state with outside air to cool the liquid refrigerant. Refrigerator 100 to be generated; And, expansion valve 200 connected to the refrigerator and delivered to the evaporator while changing the liquid refrigerant in a high pressure state to low pressure using the capillary principle; and, installed inside the machine room 20, and expanded It is connected to the valve and is supplied with a liquid refrigerant at low temperature and low pressure, and heat is absorbed through exchange with outside air to evaporate in a gaseous state to generate cold air; and in particular, the upper expansion valve 200 comprises a first The expansion valve 210 and the second expansion valve 220 are dividedly installed, and the first and second expansion valves 210 and 220 operate alternately to secure a defrosting time of an inactive expansion valve, and from the defrosting time of the liquid refrigerant. It is characterized by continuous evaporation and dehumidification while maintaining the inside of the drying chamber at a low temperature for less than 0°C for a long time.

In addition, the expansion valve 200 includes a solenoid valve connected by a circuit with a control unit 400 located outside the machine room 20, and the control unit 400 further includes a timer to open and close the expansion valve. It is characterized in that the alternating operation and alternating time of the first and second expansion valves 210 and 220 are adjusted by switching automatically or manually.

In addition, in the upper drying chamber 10, a sensor 30 associated with the control unit 400 is installed inside, and the upper sensor 30 measures the internal temperature and humidity of the drying chamber and operates the expansion valve 200 through the control unit. It is characterized by determining whether or not to keep the internal temperature and humidity constant.

In addition, the upper machine room 20 is provided with a suction port 21 through which the outside is supplied to the outside and supplied with outside air, and the above drying room 10 further includes a ventilation hole 13 through which the inside ceiling is communicated with the outside to discharge the bet. It is characterized in that it is discharged to the vent through the inlet and evaporator 300.

In addition, the upper inlet 21 includes an antibacterial filter 21-1 is further provided to purify the outside air.

In addition, the above drying chamber 10 is provided with a plurality of guide rails 11 for interlayer storage of the object to be dried on both sides of the inside, and a plurality of air outlets 12 are formed on both sides and the bottom of the drying chamber so that cold air flows over the entire surface. It is characterized by being circulated about.

According to the invention made of the above-described configuration, the expansion valve is divided into a first expansion valve and a second expansion valve, each of which can be operated by a control unit, so that when the first expansion valve is exposed, the first expansion valve stops working at the same time. The second expansion valve operates to circulate the liquid refrigerant. On the contrary, when redundancy occurs in the second expansion valve, the second expansion valve stops working and the first expansion valve operates to continuously evaporate the liquid refrigerant to increase the temperature and humidity inside the drying chamber. There is an effect that can be kept constant at all times.

In addition, the present invention induces the first expansion valve and the second expansion valve to be supplied with different temperatures as they are installed in a bisected state, for example, the first expansion valve is 5° C. for 1 hour, and the second expansion valve is 17° C. 3 By alternately operating the time, a temperature difference is given to the to-be-dried object accommodated in the drying room to minimize nutrients that are destroyed during drying, and there is another effect of drying the to-be-dried product with the best quality.

In addition, the present invention has another effect that allows the antibacterial filter installed at the intake port receiving air from the outside to remove bacteria and various fine dust present in the air to provide cleaner air.

1 is a left perspective view of a cold air dryer capable of maintaining a low temperature by a double refrigeration cycle constructed according to a preferred embodiment of the present invention.
FIG. 2 is a right perspective view of FIG. 1;
Figure 3 is a perspective view showing the installation form of the expansion valve by expanding the upper end of the machine room proposed in the present invention.
Figure 4 is a perspective view showing the structure of a cooling coil, a temperature and humidity sensor, and a ventilation opening by enlarging the inner upper portion of the drying chamber proposed in the present invention.
Figure 5 is a perspective view showing the installation structure of the expansion valve inside the machine room proposed in the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention and the effects and effects thereof will be collectively described.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims. And throughout the specification, the same reference numerals refer to the same components.

The present invention relates to a cold air dryer that produces a high-quality dry product with minimal change in the composition of an object to be dried by providing cold air to the drying chamber.

Above all, the present invention actively improves the existing method, which was impossible to maintain low-temperature drying for a long time while the temperature control is limited due to the dropping of the expansion valve, and the defrosting time of the expansion valves that are not operating due to the alternating operation of the expansion valves bisected with each other. Note that it is related to the cold air dryer 1 capable of maintaining low temperature by a double refrigeration cycle configured to ensure that the liquid refrigerant is continuously evaporated to maintain the low temperature state of the drying chamber uniformly by securing.

As described above, when the corresponding cold air is generated for a long time, a conventional cold air dryer causes a dropping phenomenon in the expansion valve, and power for defrost is stopped at a predetermined time. At this time, cold air is not supplied during the time when the power of the cold air dryer is stopped. There was no fluctuation in the internal temperature of the drying chamber, or the internal temperature of the drying chamber could not be formed below 15°C. As a result, the existing cold air dryer was unable to obtain a high-quality dry product because it was difficult to dry at low temperature or was able to dry at low temperature, and it was impossible to continuously supply the low temperature due to the problem of expansion of the expansion valve.

Accordingly, the present invention is to provide a sanitary cold air dryer that can maintain a unique color while minimizing the destruction of nutrients of a to-be-dried object, such as continuously supplying cold air at a predetermined temperature by completely solving the problem of dropping occurring in the expansion valve.

Accordingly, the cold air dryer 1 of the present invention is as follows.

1 is a left perspective view of a cold air dryer capable of maintaining a low temperature by a double refrigeration cycle constructed by a preferred embodiment of the present invention, and FIG. 2 is a right perspective view showing a machine room structure of a cold air dryer.

Prior to explaining the present invention, the to-be-dried object referred to in the present invention should be understood as a concept including all agricultural and marine products such as fruits, vegetables, and fish, and all products that need to be dried or can be dried.

In addition, the expansion valve referred to in the present invention is interpreted as an upper concept of the evaporator coil, so that the dropping phenomenon occurring in the expansion valve occurs in the same manner in the evaporator coil, and it is natural that defrosting is also performed in the same way.

As shown in Figure 1, the cold air dryer 1 of the present invention is divided into left and right through a partition wall S vertically inserted into a body made of a rectangular parallelepiped, and one side is a drying chamber 10 for receiving a large amount of dried objects ; And, the other side is composed of a machine room (20) for generating cold air to be supplied to the drying chamber.

The drying chamber 10 is provided with an internal space for accommodating the object to be dried, and a plurality of guide rails 11 are provided on both side walls of the interior space to guide the interlayer storage of the object to be dried, so that the object to be dried can be safely and safely accommodated in large quantities. It becomes possible.

The guide rail 11 is provided in a length corresponding to the width of the front and rear of the drying chamber 10, and is fastened by bolting with the wall surface of the drying chamber, and has a feature that can be installed with different stacking widths depending on the size of the object to be dried. .

The above drying chamber 10 is further provided with a plurality of tuyeres 12 on both inner side walls and a bottom surface, and the tuyeres 12 are provided with air trapped inside the drying chamber and cold air supplied from the machine room 20 for each tuyer. By uniform spraying, air circulation to the entire interior of the drying chamber is achieved.

In addition, the drying chamber 10 is further formed with a ventilation hole 13 formed to communicate with the outside on the inner ceiling surface, and the ventilation hole serves to discharge the gas having an increased temperature to the outside by remaining inside the drying room for a long time.

On the other hand, in the upper drying chamber 10, the freezer 100 is mounted on the outer top, and the upper freezer 100 includes a compressor (not shown) and a condenser (not shown), respectively, and the upper compressor is a freezer ( 100) is operated by an electric motor in the interior space and compresses the air supplied from the outside to transform it into a high temperature and high pressure state. In addition, the above condenser is installed in the internal space of the refrigerator 100, such as a compressor, and quickly converts the high temperature and high pressure gas generated through the compressor into the liquid state by rapidly exchanging with the air sucked from the outside. At this time, heat is released while the high-temperature and high-pressure gas is in contact with the outside air, and the freezer discharges air at room temperature.

2 to 3 is a perspective view and a partially enlarged view showing the installation structure of the expansion valve and the foreground of the machine room.

As shown in Figure 2, the expansion valve 200 of the present invention extends from the pressure gauge 201 installed outside the drying chamber 10, passes through a condenser inside the refrigerator 100 located at the top of the drying chamber, and evaporator of the machine room 20. It is connected to 300.

As shown in Figure 3, the expansion valve 200 of the present invention takes over the liquid refrigerant whose temperature is lowered from the condenser and delivers it to the evaporator 300 of the machine room 20, wherein the expansion valve 200 of the present invention The first expansion valve 210 and the second expansion valve 220 are installed on both sides.

Here, the above expansion valve 200 is a solenoid valve connected by a circuit with the control unit 400 installed outside the machine room 20, and whether or not the valve is opened or closed automatically or manually is determined so that the first and second expansion valves 210 and 220 It is possible to control whether the liquid refrigerant flowing in the tube is circulated.

In particular, the above control unit 400 is further built in a timer, and is configured to control the opening and closing time of the expansion valve every time set in the timer by interconnecting the expansion valve 200 and the timer.

The expansion valve 200 passes through the upper end of the machine room 20 and is connected to the cooling coil 310 disposed on the uppermost layer inside the machine room to transfer liquid refrigerant. For example, the cooling coil 310 may be provided with cooling of the gas through circulation of the liquid refrigerant and dehumidification.

On the other hand, the upper machine room 20 is formed so as to communicate with the outside on any part of the interior ceiling is further provided with a suction port 21 to receive outside air, the air entering the interior through the upper suction port can receive the interior space of the machine room As it cycles through, it enters the cooling coil 310 and attempts heat exchange with the liquid refrigerant.

Here, the upper intake port 21 is further provided with an antibacterial filter 21-1 on the front side to actively block bacteria and fine dust contained in the inhaled air to induce only supply of fresh air.

The antimicrobial filter 21-1 in the present invention is a filter pad formed by stacking at least one or more of a plurality of meshes formed in a pattern in which pores of a fine size are uniform, and is coated by applying a natural antibacterial agent to the filter pad above.

At this time, the natural antibacterial agent is an antibacterial member that mixes all materials excellent in air purification, such as charcoal with fine particle size, rosin powder, tilansia powder, silver nano, etc. It is made of a sealant.

The above charcoal, pine resin, and tilansia powder have a role of not only filtering out fine dust in the air but also decomposing and completely removing fine dust to induce to produce cleaner cool air, as well as meeting environmental factors.

In the expansion valve 200, condensation occurs when the liquid refrigerant is circulated in contact with air having a temperature higher than this in the process of circulating the liquid refrigerant, and accordingly, a frost phenomenon in which frost is formed around the expansion valve and the like occurs. This redundancy phenomenon causes problems in many ways, such as heat exchange and air circulation in the external period supplied through the liquid refrigerant and the inlet 21 above the expansion valve 200, leading to deterioration in the performance of the evaporator.

As described above, if the redness phenomenon occurs to the extent that heat exchange between the liquid refrigerant and the outside air is difficult, the operation of the refrigerator 100 and the expansion valve 200 is stopped for a while, and hot air is supplied to the area where the redness phenomenon has occurred to remove frost. Perform defrosting operation.

Here, the expansion valve 200 of the present invention can be individually operated by the control unit 400 in a state that is divided into the first expansion valve 210 and the second expansion valve 220. When the expansion valve stops working, the second expansion valve operates to circulate the liquid refrigerant. On the contrary, when redundancy occurs in the second expansion valve, the second expansion valve stops working and the first expansion valve operates to alternately operate. .

As described above, the cold air dryer 1 according to the present invention continuously maintains the indoor temperature and humidity of the drying chamber at a constant low temperature of 0° C. or less as the liquid refrigerant continuously evaporates as the defrosting operation is continued by the alternating operation function of the expansion valve 200. Can keep.

In addition, it is preferable that the range in which the dew phenomenon occurs due to the above-mentioned condensation should be interpreted to include all valves and piping to the evaporator, including the expansion valve.

On the other hand, at the bottom of the inner space of the machine room 20, at least one heating rod 330 is installed to heat the outside air, and the heated outside air travels through the inside space of the machine room several times to expand the valve 200 and its surroundings. It serves to remove the formed frost.

In addition, a blower fan 320 is further provided in the space between the cooling coil 310 and the heating rod 330 in the interior space of the machine room 20 to smoothly transmit the air heated by the heating rod to the cooling coil. .

4 is a perspective view showing the structure of a cooling coil, a temperature/humidity sensor, and a ventilation hole by enlarging the upper portion of the interior of the drying chamber.

4, the drying chamber 10 of the present invention is provided with a sensor 30 for detecting indoor temperature and humidity. The above sensor 30 is connected to the control unit 400 installed outside the drying chamber 10, and transmits information to the control unit that detects the indoor temperature and humidity of the drying room in real time. In addition, the control unit 400 controls the operation of the freezer 100 and the expansion valve 200 when there is a certain difference between the current indoor temperature and humidity than the preset temperature and humidity registered in the control unit, and the indoor temperature and humidity of the drying room is always displayed. Try to keep it constant.

As described above, the expansion valve 200 of the present invention, which is divided into a first expansion valve 210 and a second expansion valve 220, provides a'double temperature application drying method'.

Here, the dual-temperature drying method means that the first expansion valve 210 and the second expansion valve 220 can be supplied at different temperatures through the first expansion valve and the second expansion valve according to the bilateral installation.

By the above-described drying method, the first expansion valve 210 is alternately operated at 5° C. for 1 hour, and the second expansion valve is alternately operated at 17° C. for 3 hours to provide a temperature difference to the object to be accommodated in the drying room to minimize nutrients destroyed during drying. To dry the object to be dried with the best quality.

The cold air dryer (1) of the present invention having the above-described configuration can be individually operated by a control unit in a state where the expansion valve is divided into a first expansion valve and a second expansion valve, so that when the first expansion valve is exposed, the first expansion valve is operated. At the same time, the second expansion valve operates to circulate the liquid refrigerant. On the contrary, when redundancy occurs in the second expansion valve, the second expansion valve stops working and the first expansion valve operates to continuously evaporate the liquid refrigerant to dry the room. The internal temperature and humidity can be kept constant at all times. In addition, as the first expansion valve and the second expansion valve are installed in a bisected state, the first expansion valve and the second expansion valve are induced to supply different temperatures, for example, the first expansion valve is 5°C for 1 hour, and the second expansion valve By operating alternately at 17°C for 3 hours, a temperature difference is applied to the object to be stored in the drying room to minimize nutrients that are destroyed during drying, thereby drying the object to be dried at the best quality. In addition, the antibacterial filter installed in the intake port receiving air from the outside can remove bacteria and various fine dust present in the air to provide cleaner air.

The present invention described above has been described with reference to one embodiment shown in the drawings, but this is only an example, and various modifications and equivalent other embodiments are possible from those skilled in the art. Should be clarified. Therefore, the true technical protection scope of the present invention should be interpreted by the appended claims, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

1. Cold and hot dryer
10. Drying room
20. Machine room
100. Freezer
200. Expansion valve
300. Evaporator

Claims (6)

A drying chamber in which a plurality of guide rails 11 for interlayer storage of an object to be dried are provided on both sides of the interior, and a plurality of blowers arranged horizontally at a position adjacent to the guide rail discharge cold air to dry the stacked object to be dried. (10);
A mechanical chamber 20 which is separated from the drying chamber by the partition wall S and continuously generates cold air and supplies it to the drying chamber;
Refrigerator (100), which is installed on top of the drying chamber (10) and has a compressor and a condenser built in, to generate a liquid refrigerant by contacting the coolant generated in a high temperature and high pressure state with outside air;
The condenser of the freezer and the evaporator of the machine room are interconnected to transfer the liquid refrigerant provided by the condenser to the evaporator, which is bisected by the first and second expansion valves (210, 220) to operate alternately with each other while evaporating as the defrosting time for the mutual drop is secured alternately By continuously supplying the liquid refrigerant of the furnace, the first and second expansion valves 210 and 220 reach the evaporator installed in a single place through the joint pipe 221 connected to one passage again in a section adjacent to the evaporator 300. An expansion valve 200 that discharges cold air in a predetermined direction from a set position;
An evaporator 300 installed inside the machine room 20 and connected to the expansion valve to generate cold air while evaporating in a gaseous state by absorbing heat through exchange with external air while being supplied with a low-temperature, low-pressure liquid refrigerant;
A control unit 400 installed outside the machine room and connected to the expansion valve to control whether the expansion valve is operated through a sensor;
In the cold air dryer consisting of,
The drying chamber 10 determines whether or not the expansion valve 200 is operated based on the internal temperature and humidity detection information of the sensor 30 associated with the control unit 400 so that the internal temperature and humidity are kept constant,
The expansion valve 200 is connected to the control unit 400 by a circuit, and the opening and closing of the expansion valve is automatically or manually switched by a timer sensor built in the control unit to alternately operate and alternate the first and second expansion valves 210 and 220. Including a solenoid valve with time control,
The upper machine room 20 includes an intake port 21 that is internally communicated with the outside at the top to receive external air, and an antibacterial filter 21-1 for shielding the intake air to purify the outside air being supplied, but the antibacterial filter 21-1 above Is a filter pad coated with natural antimicrobial agent, which is a mixture of fine particles of charcoal powder, rosin powder, tilicia powder and silver nano, made by stacking at least one or more meshes formed with a plurality of through holes of a set size in a set pattern. Cold air dryer that can maintain low temperature by double refrigeration cycle.
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