KR102626718B1 - Condensed Refrigerant Supercooling System for Direct Expansion Air Conditioner - Google Patents

Abstract

The condensate refrigerant supercooling device for a direct expansion air conditioner of the present invention has a condensate inlet 171 that introduces low-temperature condensate from the drain plate 160, and a condensate inlet 171 to expand the range of condensate flowing down from the condensate inlet 171. A porous plate 177 provided on the lower side of the condensate inlet 171, a condensate outlet 175 that discharges the condensate after the condensate flowing down from the porous plate 177 exchanges heat with the refrigerant of the refrigerant pipe 174, A refrigerant pipe 174 is provided on the lower side of the diaphragm 177 and transports the refrigerant, a heat exchange fin 176 is fixed to the outer surface of the refrigerant pipe 174 to expand the heat transfer area, and is connected to the refrigerant pipe 174 and condenses the refrigerant. The summary is that the supercooling device 170 includes a refrigerant inlet connection 172 through which coolant is introduced, and a refrigerant outlet connection 173 connected to the refrigerant pipe 174 and through which supercooled refrigerant is discharged.

Description

Condensed Refrigerant Supercooling System for Direct Expansion Air Conditioner}

The present invention relates to a direct expansion air conditioner. Specifically, the condensed water discarded from the drain plate passes through the refrigerant pipe inside the condensed refrigerant supercooling device, thereby supercooling the condensed refrigerant through heat exchange between the condensed water and the refrigerant, thereby significantly increasing evaporation efficiency. It relates to a condensing refrigerant supercooling device for a direct expansion air conditioner that has an increasing action and effect.

An air conditioner maintains indoor conditions such as temperature, humidity, airflow, bacteria, dust, odor, and toxic gases in the best conditions for people or items indoors. Air conditioners for clean rooms place importance on cleanliness, so the number of ventilations is high, which increases the amount of air required from the air conditioner. As the wind volume increases, the amount of water vapor contained in the humid air increases, and when the humid air passes through the cooling coil of the air conditioner, the surface temperature of the cooling coil becomes lower than the dew point temperature of the humid air, causing condensation. The water generated due to condensation within the air conditioner is called condensate, and the amount of condensate generated increases as the wind volume increases.

In a conventional air conditioner, a drain plate is installed in the empty space below the cooling coil. The purpose of the drain plate was to serve as a water catcher and drain condensate to drain water condensed from the cooling coil (evaporation coil) after mixing indoor return air (RA) with outdoor air. The conventional drain plate was designed to drain condensate. It is connected to the pipe and drains condensate.

Figure 1 is a diagram showing the installation state of a conventional air conditioner (see Figure 2).

In the conventional air conditioner 100 shown, the drain plate 160 is installed below the cooling coil 120, and the temperature of the outside air introduced from the outside air intake port 200 and cooled as it passes through the cooling coil 120 is lowered, and the temperature of the surface of the cooling coil 120 is lower than the dew point temperature of the outside air, so moisture contained in the outside air condenses on the surface of the cooling coil 120, causing condensation.

The condensed moisture freely falls to the bottom of the cooling coil 120 and accumulates in the drain plate 160, and the condensed water accumulated in the drain plate 160 flows out to the outside through the drain pipe.

However, the conventional air conditioner had a problem in that it could not maximize energy utilization by recycling condensate discarded from the existing drain plate 160 to increase evaporation capacity and improve refrigeration efficiency.

Public Patent Publication No. 10-2014-0043292 (published on April 9, 2014)

The present invention is intended to solve the above problems. By passing the condensed water generated in the evaporation part (cooling coil) in the air conditioner through a supercooling device installed below or outside the drain plate, the refrigerant and condensate exchange heat to form a condenser of the refrigerator. By cooling the condensed and liquefied refrigerant again, it increases the degree of supercooling of the refrigerant to a temperature lower than the saturation temperature for the pressure, and reduces the amount of flash gas generated, thereby increasing the refrigeration capacity and performance coefficient to cool the air conditioner. The purpose is to provide a condensing refrigerant supercooling device for a direct expansion air conditioner that increases efficiency.

The condensate refrigerant supercooling device for a direct expansion air conditioner of the present invention includes a condensate inlet that introduces low-temperature condensate from a drain plate, and a perforated plate provided on the lower side of the condensate inlet to expand the range of condensate that flows down from the condensate inlet. , a condensate outlet that discharges the condensate after the condensate flowing down from the perforated plate exchanges heat with the refrigerant in the refrigerant pipe, a refrigerant pipe provided on the lower side of the perforated plate and transporting the refrigerant, and fixed to the outer surface of the refrigerant pipe to expand the heat transfer area. It is characterized by a supercooling device including a heat exchange fin, a refrigerant inlet connection connected to the refrigerant pipe and through which condensed refrigerant flows, and a refrigerant outlet connection connected to the refrigerant pipe and through which supercooled refrigerant is discharged.

In addition, the condensate inlet, condensate outlet, porous plate, and supercooling device are made of stainless steel, and the refrigerant inlet connection, refrigerant pipe, heat exchange fin, and refrigerant outlet connection are made of copper or copper material with high thermal conductivity to improve heat transfer performance. The supercooling device has a structure with the bottom inclined toward the condensate outlet to facilitate the discharge of condensate, and the refrigerant pipe and heat exchange fins fixed to the outer surface of the refrigerant pipe are connected to the condensate outlet to expand the heat transfer area. It is characterized by having a structure inclined toward the wealth.

In addition, the heat exchange fins are arranged at regular intervals in a thin plate shape, and the condensate outlet is equipped with a solenoid valve that opens and closes by temperature or pressure and is connected to an external U trap to prevent backflow of external air. It is characterized by

In addition, the perforated plate is characterized in that through holes are formed, and guide grooves are provided between each through hole.

In the present invention, unused condensate discarded from the cooling coil (evaporator) flows into the supercooling device through a drain plate, and the refrigerant pipe flowing from the condensation part of the refrigerator to the evaporation side passes through the heat exchange part inside the supercooling device to exchange heat between the refrigerant and the condensate. By supercooling the condensed refrigerant, it increases the cooling efficiency and refrigeration capacity of the refrigerator, which is the heat source of the air conditioner, and has the effect of reusing unused energy.

In addition, by reducing the amount of flash gas generated, it has the effect of increasing the cooling efficiency of the direct expansion air conditioner by increasing the refrigeration capacity and performance coefficient.

In addition, since the condensate is discharged to the lower side of the perforated plate in a dispersed state, it has the effect of maximizing heat exchange efficiency by expanding the contact area between the condensate and the heat exchange fins.

In addition, as the contact area between the outside air and the adsorbent increases, the flow rate of the outside air in contact with the adsorbent also becomes different, which has the effect of significantly increasing the adsorption efficiency of removing moisture from the adsorbent.

In addition, the outside air passing through the filter inactivates human influenza and avian influenza viruses, has a synergistic antibacterial effect against bacteria and mold, and maximizes the function of filtering suspended solids and fine dust, while reducing the risk of harm to the human body. There is an effect that can be minimized.

Figure 1 is a diagram showing the installation state of a conventional air conditioner.
Figure 2 is a detailed view of the air conditioner of the present invention.
Figure 3 is a specific perspective view showing the supercooling device of Figure 2.
Figure 4 is a front view and a rear view of the supercooling device.
Figure 5 is a right side view and a left side view of the supercooling device.
Figure 6 is a perspective view of a perforated plate.
Figure 7 is a schematic cross-sectional view of the installation state of the dehumidifier and the external air guide part.

Preferred embodiments of the present invention will be described in detail with reference to the attached drawings. For reference, the sizes of components, thickness of lines, etc. shown in the drawings used to describe the present invention may be somewhat exaggerated for ease of understanding.

In addition, the terms used in the description of the present invention are defined in consideration of the functions of the present invention and may vary depending on the user, operator intention, custom, etc. Therefore, the definition of this term should be based on the overall content of this specification.

In the present application, terms such as 'comprise', 'have', etc. refer to the existence of specific numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not refer to the presence of one or more other numbers, steps, operations, components, parts, or combinations thereof. It should be understood that this does not exclude in advance the possibility of the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, but the present embodiments only serve to ensure that the disclosure of the present invention is complete and to convey the scope of the invention to those skilled in the art. It is provided for complete information.

Therefore, since the present invention can make various changes and take various forms, implementation examples (or embodiments) will be described in detail in the specification. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the technical idea of the present invention, and the singular expressions used in this specification are clearly different from the context. Unless otherwise intended, plural expressions are included.

However, in describing the present invention, detailed descriptions of well-known or known functions or configurations will be omitted to make the gist of the present invention clear.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Figure 2 is a detailed view of the air conditioner of the present invention, Figure 3 is a specific perspective view showing the supercooling device of Figure 2, Figure 4 is a front and rear view of the supercooling device, and Figure 5 is a right and left side view of the supercooling device.

As shown, the air conditioner 100 of the present invention includes an external air intake port 200, a filter 110, a cooling coil 120, a heating coil 130, a dehumidifier 140, a supply air outlet 300, It includes a blower (150).

The unexplained symbol 600 is a pad.

The air conditioner 100 as described above improves cleanliness by removing dust or dust mixed in the outside air as the outside air flowing in from the outside air intake port 200 passes through the filter 110, and removes low temperature air. A cooling coil 120 to cool the air to supply it, a heating coil 130 to heat the air to supply high temperature air, a dehumidifier 140 to form low humidity air to the required humidity, and an appropriate temperature. And it consists of a blower 150 for supplying air formed by humidity into the room, and an air supply outlet 300 for supplying air from inside the air conditioner to the room.

One of the features of the present invention is that the air conditioner 100 is provided with a supercooling device 170 connected to the drain plate 160.

The supercooling device 170 has a structure with a bottom inclined toward the condensate outlet 175 to facilitate discharge of condensate, and includes a condensate inlet 171, a refrigerant inlet connection 172, and a refrigerant outlet connection ( 173), a refrigerant pipe 174, a condensate outlet 175, a heat exchange fin 176, and a perforated plate 177.

In the condensate water inlet 171, the condensed water accumulated in the drain plate 160 flows into the upper part of the porous plate 177 inside the supercooling device 170 through the condensate water inlet 171.

In the perforated plate 177, condensate flowing in from the condensate inlet 171 freely falls to the top of the perforated plate 177 installed on the top of the supercooling device 170.

The perforated plate 177 has a function of spreading the freely falling condensate. When the condensate falls downward, it increases the falling area and increases the contact area between the condensate and the heat exchange fin 176, thereby increasing the efficiency of heat exchange. This is to maximize.

The heat exchange fins 176 are arranged at regular intervals in a thin plate shape, are fixed to the outer surface of the refrigerant pipe 174, and are provided on the lower side of the perforated plate 177 to collect condensate that falls from the perforated plate 177. By contacting with and exchanging heat, the refrigerant is cooled.

The refrigerant pipe 174, like the supercooling device 170, has a structure inclined toward the condensate outlet 175. The refrigerant pipe 174 has an inclined structure and is fixed to the outer surface of the refrigerant pipe 174. Since the heat exchange fins 176 have an inclined structure, the heat transfer area is increased and the heat exchange efficiency can be improved by smoothing the flow of condensate.

In other words, installing the refrigerant pipe 174 in an inclined structure rather than installing it horizontally in a certain section can relatively increase the heat transfer area.

The condensate outlet 175 is opened and closed by temperature or pressure by installing a solenoid valve, and is connected to an external U trap to prevent backflow of external air.

Since the solenoid valve and U trap are well-known and commonly used structures in this technical field, description and illustration of the interlocking relationship of the specific structures are omitted here.

Additionally, this embodiment has another feature in that the condensate water inlet 171, the condensate outlet 175, the perforated plate 177, and the supercooling device 170 are made of stainless steel.

In addition, another feature of the refrigerant inlet connection part 172, the refrigerant pipe 174, the heat exchange fin 176, and the refrigerant outlet connection part 173 is that they are made of copper or a copper material with high thermal conductivity to increase heat transfer performance. .

Looking at the operational relationship of this supercooling device,

Freely falling condensate passes through the perforated plate 177 and the heat exchange fin 176 to supercool the refrigerant and collects at the bottom of the supercooling device 170, and the accumulated condensate is discharged through the condensate outlet 175. The condensing section refrigerant pipe connected to the outdoor unit is connected to the refrigerant inlet connection 172 of the supercooling device 170, is connected to the refrigerant pipe 174, and passes through the refrigerant outlet connection 173 connected to the evaporation section refrigerant pipe.

The refrigerant radiated from the outdoor unit passes through the refrigerant inlet connection part 172, passes through the refrigerant pipe 174 of the supercooling device 170, and flows into the evaporation unit through the refrigerant outlet connection part 173.

In the refrigerant flow process, the condensed refrigerant is supercooled by heat exchange with the low-temperature condensate remaining inside the supercooling device 170 and the low-temperature condensate that freely falls.

The heat exchange effect of the heat exchange fin 176 attached to the refrigerant pipe 174 having an inclined structure increases as the heat transfer area increases. Therefore, by increasing the heat exchange area of the condensed refrigerant and condensate water passing through the refrigerant pipe 174, It has the action and effect of significantly increasing heat exchange efficiency.

In the following examples, a structure in which condensate can disperse and flow in a porous plate will be described.

Figure 6 is a perspective view of the perforated plate.

As shown, the porous plate 177 of this embodiment is characterized in that a plurality of through holes 177a are formed, and a guide groove 177b is provided between each through hole 177a.

Condensate entering the upper surface of the perforated plate 177 having this structure is distributed along the guide grooves 177b between the perforated plates 177 and discharged through each through hole 177a, so that the condensate is dispersed. Since it can be discharged to the lower side of the perforated plate 177 in its current state, it has the effect of maximizing heat exchange efficiency by expanding the contact area between the condensate and the heat exchange fins 176.

In the following examples, the specific structure of the dehumidifier will be described.

Inside the air conditioner 100 equipped with the supercooling device 170 connected to the drain plate 160, a filter 110, a cooling coil 120, a heating coil 130, and a dehumidifier ( 140) and the blower 150 are sequentially provided, and in this embodiment, the purpose is to provide a configuration that can maximize the dehumidifying efficiency of the dehumidifier 140.

Figure 7 is a schematic cross-sectional view of the installation state of the dehumidifier and the external air guide part.

As shown, the dehumidifier 140 of this embodiment includes a porous mesh 141, a fan 142, an adsorbent 143, a regenerative heater 144, a cover 145, and a support portion 146, and an external It is organically combined with the air guide part 180.

The porous network 141 has a space formed inside, and is provided at the center of the outer surface connected at the lower end of the cover 145 and the upper surface of the support part 146, and has a function of allowing external air to pass through, and the space part has a function of allowing external air to pass through. An adsorbent 143, which will be described later, is built in.

Of course, bar-shaped supports (not shown) are formed in the upper and lower directions on the porous network 141 as described above, so that the shape of the porous network 141 can be maintained.

The fan 142 is provided on the lower side of the porous network 141 provided on the support part 146 and blows air, thereby dispersing and scattering the adsorbent 143, thereby maximizing dehumidification efficiency.

The adsorbent 143 is provided in the inner space of the porous network 141 and is made of a bead-shaped material of silicon dioxide (S1O ₂ ), and adsorbs water or vapor. Moist external air passes through the adsorbent. As the adsorbent combines with the moisture in the outside air to form a mixture, the outside air loses moisture and dries.

The regenerative heater 144, when provided on the lower side of the cover 145, is heated by the operator's selection while the dehumidifier 140 is not running, thereby removing moisture adsorbed on the adsorbent 143 and removing the adsorbent ( 143) has the effect of regenerating the adsorption function.

Looking at the operating relationship of this dehumidifier,

When outside air passes through the porous network 141 and enters the interior of the porous network 141, the outside air comes in contact with the adsorbent 143 and its moisture is removed. At this time, the adsorbent 143 is dispersed and scattered by the fan 142 provided on the lower side of the support part 146, so the contact area between the outside air and the adsorbent 143 is expanded, thereby maximizing the adsorption efficiency. , it has an effect.

The external air guide part 180 has a cylindrical structure open in both directions and is provided on the side of the dehumidifier 140 in the direction where external air flows in, and includes a venturi part 181, an enlarged part 182, and a spiral groove. Includes (183).

The venturi unit 181 has a cylindrical structure with a gradually narrowing diameter, and has the function of accelerating the flow rate of incoming external air.

The enlarged part 182 is connected to the venturi part 181, which has a narrowing diameter, and has a structure in which the diameter gradually expands, minimizing the noise generated from the accelerated external air and allowing the enlarged external air to be transferred to the dehumidifier (140). ) It has the function of being drawn into the entire area of the porous network 141.

The spiral groove 183 is provided on the inner surface of the venturi part 181 and the enlarged part 182, and has the function of forming a vortex in the incoming and outgoing external air.

Looking at the operational relationship of this external air guide,

The incoming external air enters the porous network 141 in a vortex state formed by the external air guide unit 180 and is mixed with the air blown from the fan 142, so that the incoming external air flows into the interior of the porous network 141. The outside air forms turbulence.

Therefore, since the outside air collides irregularly with the adsorbent 143, which is embedded in the porous network 141 and disperses and flows, the contact area between the outside air and the adsorbent 143 is expanded, and in addition to the adsorbent 143 in contact with the adsorbent 143. The flow rate of the outside air is also different, which can have the effect of significantly increasing the adsorption efficiency of removing moisture from the adsorbent 143.

In the following examples, a filter having a sterilizing function will be described.

Since the external air passing through the filter 110 may contain harmful bacteria, the present embodiment is intended to provide a structure in which the filter net of the filter 110, which has a laminated structure of a filter net and a non-woven fabric, is coated with a sterilizing coating composition. .

Since the filter having a structure in which a filter net and a non-woven fabric are laminated is a commonly used, well-known and common structure, the linkage relationship and illustration of the specific structure are omitted here.

The sterilizing coating composition of the filter net contains 0.1 to 20 parts by weight of 2,4,4-trichloro-2-hydroxy diphenyl ether and 0.7 to 20 parts by weight of chitosan, based on 100 parts by weight of nanosilver zeolite in which silver nanoparticles are adsorbed on zeolite powder. It is characterized in that it consists of a composition containing 15 parts by weight, 5 to 25 parts by weight of terpene resin, 0.1 to 3 parts by weight of metal oxide ZnO, and 3 to 17 parts by weight of cellulose triacetate (CTA).

This composition not only has excellent efficacy in inactivating human influenza and avian influenza viruses, but also has a synergistic antibacterial effect against various bacteria and fungi.

It has the effect of maximizing the function of filtering suspended solids or fine dust and minimizing harmfulness to the human body.

In the present invention as described above, unused condensate discarded from the cooling coil (evaporator) flows into the supercooling device through a drain plate, and the refrigerant pipe flowing from the condensation part of the refrigerator to the evaporation side passes through the heat exchange part inside the supercooling device to exchange the refrigerant and By supercooling the condensed refrigerant through heat exchange, the condensed water increases the cooling efficiency and refrigeration capacity of the refrigerator, which is the heat source of the air conditioner. It also has the effect of reusing unused energy, and reduces the amount of flash gas generated, improving refrigeration capacity and performance coefficient. The effect of increasing the cooling efficiency of the direct expansion air conditioner by increasing In addition to the increased contact area between the outside air and the adsorbent, the flow rate of the outside air in contact with the adsorbent also becomes different, which has the effect of significantly increasing the adsorption efficiency of removing moisture from the adsorbent, and the outside air passing through the composition of the filter. It inactivates human influenza and avian influenza viruses, has a synergistic antibacterial effect against bacteria and fungi, maximizes the function of filtering suspended solids and fine dust, and has the combined effect of minimizing hazards to the human body. You will have it.

100: air conditioner 110: filter
120: Cooling coil 130: Heating coil
140: Dehumidifier 141: Porous mesh
142: Fan 143: Adsorbent
144: Regenerative heater 145: Cover
146: Support 150: Blower
160: Drain plate 170: Supercooling device
171: Condensate inlet 172: Refrigerant inlet connection
173: Refrigerant outlet connection 174: Refrigerant pipe
175: Condensate outlet 176: Heat exchange fin
177: Perforated plate 177a: Through hole
177b: Guide groove 180: External air guide section
181: Venturi part 182: Expansion part
183: Spiral groove 200: External air intake port
300: Air supply outlet 400: Outdoor unit
500: Refrigerant piping 600: Pad

Claims (4)

delete delete delete A condensate inlet 171 that introduces low-temperature condensate from the drain plate 160,
A perforated plate 177 provided on the lower side of the condensate inlet 171 to expand the range of condensate flowing and falling from the condensate inlet 171;
A condensate outlet 175 that discharges the condensate after the condensate flowing down from the perforated plate 177 exchanges heat with the refrigerant in the refrigerant pipe 174,
A refrigerant pipe (174) provided on the lower side of the perforated plate (177) and transporting the refrigerant,
A heat exchange fin (176) fixed to the outer surface of the refrigerant pipe (174) to expand the heat transfer area,
A refrigerant inlet connection portion (172) connected to the refrigerant pipe (174) and through which condensed refrigerant flows,
It consists of a supercooling device 170 that is connected to the refrigerant pipe 174 and includes a refrigerant outlet connection 173 through which supercooled refrigerant is discharged,
The condensate inlet 171, the condensate outlet 175, and the perforated plate 177 are made of stainless steel,
The refrigerant inlet connection part 172, the refrigerant pipe 174, the heat exchange fin 176, and the refrigerant outlet connection part 173 are made of copper or copper material with high thermal conductivity to increase heat transfer performance,
The supercooling device 170 has a structure with its bottom inclined toward the condensate outlet 175 to facilitate discharge of condensate,
The refrigerant pipe 174 and the heat exchange fin 176 fixed to the outer surface of the refrigerant pipe 174 have a structure inclined toward the condensate outlet 175 to expand the heat transfer area,
The heat exchange fins 176 are arranged at regular intervals in a thin plate shape,
The condensate outlet 175 is equipped with a solenoid valve and is opened and closed by temperature or pressure, and is connected to an external U trap to prevent backflow of external air,
A condensation refrigerant supercooling device for a direct expansion type air conditioner, characterized in that through holes (177a) are formed in the perforated plate (177), and guide grooves (177b) are provided between each through hole (177a).