WO2018143573A1

WO2018143573A1 - Vacuum cooler-integrated refrigerator

Info

Publication number: WO2018143573A1
Application number: PCT/KR2018/000359
Authority: WO
Inventors: 송덕용
Original assignee: 주식회사 성지공조기술
Priority date: 2017-02-03
Filing date: 2018-01-08
Publication date: 2018-08-09
Also published as: KR101808167B1

Abstract

Provided is a vacuum cooler-integrated refrigerator having a refrigeration cycle with a compressor, a condenser, an expander, and an evaporative condenser, wherein the evaporative condenser further comprises: a first hermetically sealed container for evaporating makeup water supplied from the outside and injected therein by heat exchange with refrigerant vapor discharged from the compressor and introduced therein to generate inner vapor and store the same; a pump unit disposed outside the first hermetically sealed container so as to suction the inner vapor, increase the pressure thereof, and deliver the same; and a second container into which the inner vapor flows on the upper side thereof and in which the makeup water delivered by the pump unit is stored.

Description

Vacuum cooler integrated freezer

The present invention relates to a refrigerator for producing cooling cold water to cool the load side.

The refrigerator refers to a system for cooling the load side by supplying cold water to the load side that needs cooling. However, the refrigerator can also heat the load side by adding some components depending on the type. Absorption-type freezer of the refrigerator includes a regenerator for regenerating the rare absorption liquid to the concentrated absorption liquid, a condenser for condensing the refrigerant vapor, an evaporator for evaporating the liquid refrigerant, and is also a refrigerator that produces cold water.

On the other hand, the refrigerator includes a cooling tower to discharge the waste heat of the cooling water whose temperature rises by heat exchange with the refrigerant of the condenser to the atmosphere. The cooling tower forcibly blows outside air through the blower to improve the cooling efficiency of the cooling water. However, when the cooling tower is to be installed in an enclosed space such as an underground machine room, there is a problem that inflow of outside air cannot be made smoothly. In addition, when the blower is used, the amount of power consumption increases and noise occurs.

On the other hand, if the cooling tower is installed on the roof of a building, not only the building aesthetics are impaired, but also the requirement for piping for connecting to a freezer arranged in an underground machine room increases.

Embodiments of the present invention have been made to solve the above problems, to provide a vacuum cooler-integrated refrigerator, in particular the cooling tower is unnecessary so that all the facilities can be installed in the underground space, such as underground machinery room. At the same time, such a refrigerator aims to minimize the amount of vibration or noise generated.

In addition, to reduce the amount of water consumed during the operation of the refrigerator. And I want to improve my grade factor.

An embodiment of the present invention is a refrigerator having a refrigeration cycle by a compressor, a condenser, an expander, and an evaporative condenser, in order to solve the above problems, the evaporative condenser is supplied from the outside is injected and discharged introduced from the compressor A first airtight container in which the make-up water is evaporated and stored by evaporation by heat exchange of refrigerant steam; A pump unit disposed at an outer side of the first airtight container and configured to suction and increase the pressure of the bet; And a second container in which the bet is introduced to the upper side and the replenishment water is transferred and stored by the pump unit.

The pump unit is a nozzle unit; A section reduction unit disposed in front of the nozzle unit; A cross-sectional enlargement unit communicating with the front of the cross-sectional reduction unit; And a suction part in which the bet is sucked and disposed between the nozzle part and the cross-sectional reduction part to form a sound pressure.

The first airtight container is a water supply tank; A supply water supply pipe for supplying supply water to the supply water tank; And a heat exchange coil in which refrigerant vapor flowing in and out is heat exchanged.

A discharge port through which the bet is discharged may be formed at an upper end of the first airtight container, and an inlet of the discharge port may be provided with an eliminator.

An outlet for discharging the bet may be formed at an upper end of the second container, and a vent pipe for discharging the bet may be connected to the outlet.

An evaporator in which refrigerant vapor is generated by evaporation; An absorber in communication with the evaporator and absorbing the refrigerant vapor; A first regenerator connected to the absorber and a pipe, the rare absorbing liquid absorbing the refrigerant vapor flows therein, and heating the rare absorbing liquid into an intermediate absorbing liquid; A second regenerator connected to the first regenerator and a pipe to introduce the intermediate absorbent liquid and to heat the intermediate absorbent liquid into a concentrated absorbent liquid; A condenser in communication with the second regenerator and condensing the refrigerant vapor generated in the second regenerator; And a cooling tower for cooling the cooling water heat-exchanged in the condenser, wherein the cooling tower has a bet caused by evaporation of the replenishment water by heat exchange between the replenishment water supplied from the outside and the cooling water introduced through the cooling water recovery line. A first sealed container to be stored; A pump unit disposed at an outer side of the first airtight container and configured to suction and increase the pressure of the bet; And a second container into which the bet conveyed by the pump unit flows upward and a replenishment water conveyed by the pump unit is stored.

The pump unit is a nozzle unit; A section reduction unit disposed in front of the nozzle unit; And a suction part in which the bet is sucked and disposed between the nozzle part and the cross-sectional reduction part to form a sound pressure.

According to the problem solving means of the present invention as described above it can be expected a variety of effects including the following matters. However, the present invention is not achieved by exerting all of the following effects.

The refrigerator according to an embodiment does not require a cooling tower, so all the facilities may be installed in an underground space such as an underground machine room. As a result, piping work such as a duct connecting the cooling tower and the freezer is unnecessary, and the material purchase cost is significantly reduced.

In addition, the refrigerator adopts a pump unit instead of a conventional pump, and by excluding the blower which is one component of the cooling tower, noise and vibration are reduced, and the electricity consumption is reduced.

In addition, the refrigerator can be disposed entirely in the basement of the building, etc., has the effect of beautiful building appearance. In addition, the refrigerator can minimize the amount of water consumed during its operation. At the same time, the freezer can improve its grade factor.

1 is a system diagram of a refrigerator according to a first embodiment of the present invention.

2 is a schematic cross-sectional view of the pump unit of FIG.

3 is a system diagram of a refrigerator according to a second embodiment.

4 is a system diagram showing a flow in which an absorbent liquid circulates in FIG. 3.

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

[First Embodiment]

1 is a system diagram of a refrigerator according to a first embodiment of the present invention, Figure 2 is a schematic cross-sectional view of the pump unit 220 of FIG. 1 and 2, the vacuum cooler integrated refrigerator has a refrigeration cycle by the compressor 10, the evaporative condenser 20, the expander 30, and the evaporator 40. At this time, each component is connected by a pipe or the like through which the refrigerant (freon gas, etc.) is circulated while repeating the refrigeration cycle.

First, the compression process is performed through the compressor 10. Specifically, the compressor 10 serves to convert the refrigerant vapor of low temperature and low pressure into the refrigerant vapor of high temperature and high pressure so that the refrigerant vapor can be condensed more easily. That is, the compressor 10 increases the pressure of the refrigerant to make the refrigerant vapor liquefied even at a relatively high temperature condition. However, due to the increase in the kinetic energy of the molecules constituting the refrigerant vapor in the process is raised the temperature. At the same time, the compressor 10 provides a compressive force so that the refrigerant vapor can be circulated in the refrigerator.

Next, the condensation process is performed in the evaporative condenser 20. The high-temperature, high-pressure refrigerant vapor discharged through the compressor 10 is deprived of heat energy through heat exchange with make-up water while passing through the evaporative condenser 20. In other words, the refrigerant vapor is gradually liquefied through heat dissipation, and when the vapor and liquid are mixed in the middle portion of the evaporative condenser 20, the refrigerant vapor is completely condensed to form a liquid refrigerant having medium temperature and high pressure. Change happens.

In detail, the evaporative condenser 20 may include a first sealed container 210 in which the feed water is evaporated by the heat exchange of the feed water injected and supplied from the outside and the refrigerant vapor discharged and discharged from the compressor 10 to generate a bet. Is disposed outside the first hermetically sealed container 210, the pump unit 220 for sucking and boosting the transfer of the bet and the second container is introduced into the upper side, the replenishment water is transported and stored by the pump unit 220 ( 230).

The first hermetically sealed container 210 cools the refrigerant vapor and simultaneously prevents evaporated water vapor, that is, the bet, from leaking out as the make-up water evaporates during the cooling process. In detail, a supply tank 241 in which supply water is stored is disposed below the first airtight container 210. The replenishment tank 241 accommodates replenishment water falling after heat exchange is made.

The first airtight container 210 is connected to a supply water supply pipe 242 for supplying supply water to the supply water supply tank 241. The replenishment water is evaporated and gradually reduced while being exchanged with the refrigerant vapor, thereby replenishing it through the replenishment water supply pipe 242.

In addition, a heat exchange coil 211 in which the refrigerant vapor flowing in and out is heat exchanged is disposed in the first hermetic container 210. The heat exchange coil 211 is a part in which heat exchange of the refrigerant vapor is performed, through which the refrigerant vapor is cooled while releasing heat contained therein. That is, the refrigerant vapor flows into the first sealed container 210 through one end of the heat exchange coil 211, and flows out of the first sealed container 210 through the other end of the heat exchange coil 211 after heat exchange.

The first airtight container spray 212 is installed on the upper side of the first airtight container 210 to spray the feed water toward the heat exchange coil 211. The first airtight container spray 212, for example, a plurality of vertical injection nozzle ball and horizontal injection nozzle ball is formed in the tube having a '-' shape can be sprayed three-dimensionally the feed water. The replenishment water is stored in the replenishment water tank 241 through the replenishment water supply pipe 242, and is circulated along the cycle of being moved to the first airtight container spray 212 side by the spray pump and sprayed.

On the other hand, the upper end of the first airtight container 210 may be formed with a discharge port for discharging bet by the replenishment water evaporated during the cooling process. In addition, the inlet of the discharge port is further provided with an eliminator (243) that can minimize the consumption of the replenishment water by preventing the droplets included in the bet to escape through the discharge port.

The second container 230 is a bet conveyed by the pump unit 220 is introduced into the upper side, the replenishment water is transferred and stored by the pump unit 220. At this time, the replenishment water is supplied from the second container 230. In addition, an upper end of the second container 230 is formed with an outlet for discharging the bet, the exhaust pipe 244 for discharging the bet is connected. Meanwhile, the replenishment water supply pipe 242 is connected to the second container 230 so that the replenishment water is supplied to and stored in the replenishment water tank 241.

The pump unit 220 has a nozzle portion 221 for injecting replenishing water at a high speed, and a cross-sectional reduction portion 222 disposed in front of the nozzle portion 221 and a cross-sectional enlargement portion communicating with the front of the cross-sectional reduction portion 222. And a suction part 224 disposed between the nozzle part 221 and the cross-sectional reduction part 222 to form a sound pressure. In addition, a driving fluid pump 245 for transferring the replenishment water may be further disposed between the nozzle unit 221 and the second container 230.

Here, the pump unit 220 is a kind of jet pump operates on the same principle as the ejector (ejector). A negative pressure is formed in the suction part 224 due to the replenishment water ejected at high speed from the nozzle part 221. As a result, the bet stored in the first airtight container 210 is sucked into the suction part 224, and the make-up water and the bet are mixed with each other in the section reduction part 222. At this time, the kinetic energy of the replenishing water is converted into the kinetic energy of the mixed fluid (supply water and bet), which is converted into pressure as the moving speed decreases in the sectional enlargement unit 223 connected to the sectional reduction unit 222 do.

Therefore, the bet will have a higher pressure than the pressure in the suction unit 224, it can be easily moved from the first airtight container 210 to the second container (230). That is, the bet can be boosted and transported. As a result, the driving power consumed by the conventional pump can be reduced.

Alternatively, the pump unit 220 may be used, for example, a vacuum pump.

The exhaust pipe 244 may be further installed with a filter module (not shown). The filter module reduces the humidity of the bet discharged through the second vessel 230. At this time, the bet may occur due to the evaporation of the replenishment water in the second container 230. That is, the bet discharged through the second container 230 may be in a high temperature and high humidity.

Therefore, when the air on the ground is particularly low temperature, white smoke is likely to be generated by the bet when operating the refrigerator. To prevent this, the filter module is installed on the exhaust pipe 244 to reduce the absolute humidity by absorbing the moisture of the bet discharged.

The filter module is made of, for example, a membrane member. The membrane member is in the form of a separator capable of separating substances of different particle sizes from the fluid. Such a membrane member is not particularly limited in structure, material, principle of movement of the material through the membrane member, and the like, and may be anything as long as selective movement of the material can occur.

The membrane member may be formed in a cylindrical shape. In addition, the membrane member may be disposed on the exhaust pipe 244 in the direction of movement of the bet and may be connected in series with each other. Specifically, the membrane member is arranged such that the incoming bet can be moved along the exhaust pipe 244 while maintaining its direction. At this time, the membrane member can selectively absorb moisture through the inner circumferential surface surrounding the cylindrical inner hollow. As a result, the bet in saturated state can be changed into dry air.

On the other hand, when saturated air passes through the membrane member, moisture is accumulated in the membrane member. At this time, the accumulated moisture must be removed to some extent to continuously absorb the moisture through the membrane member. To this end, some of the dry air provided through the membrane member is fed back to the membrane member.

The expansion process will then lower the pressure of the refrigerant so that the liquid refrigerant can easily evaporate even at relatively high temperature conditions. This expansion process is an enthalpy process such as a pressure decrease (throttle phenomenon) without exchanging heat or amount of heat with the outside when passing through a flow path where the cross-sectional area is rapidly narrowed, such as a nozzle or an orifice. Specifically, the expansion process is made through an inflator 30 such as an expansion valve.

Finally, the evaporation process is performed in the evaporator 40, and the liquid refrigerant discharged through the expander 30 is evaporated to cool the cold water flowing from the load side device.

The load-side equipment is a room that needs cooling or constant temperature and humidity control, and is disposed in various spaces such as a computer room and an office. That is, the load side device may cool the load side air by allowing the cold water supplied through the cold water supply line 52 connected to one side to exchange heat with the load side air. In addition, the cold water recovery line 51 is connected to the other side of the load-side device so that the cold water heated in the process of cooling the load-side air can be sent out to the evaporator 40 and cooled. At this time, it is preferable that a separate cold water pump is installed in the cold water recovery line 51 so that cold water can be recovered to the evaporator 40 side quickly and smoothly.

Second Embodiment

3 is a system diagram of a refrigerator according to a second embodiment, and FIG. 4 is a system diagram illustrating a flow in which an absorbent liquid circulates in FIG. 3. Referring to FIGS. 3 and 4, the vacuum cooler integrated refrigerator includes an evaporator 110, an absorber 120, a first regenerator 130, a second regenerator 140, a condenser 150, a cooling tower 200, and the like. Include. At this time, each component is connected by piping.

The evaporator 110 cools the cold water coil 111 located therein as the refrigerant evaporates. At this time, refrigerant vapor is generated inside the evaporator 110. The cold water coil 111 is connected to the load side device, and the cold water cooled in the evaporator 110 is supplied to the load side device through the cold water coil 111 to cool the load side. A cold water pump is installed on the cold water coil 111 to allow cold water to be forcedly circulated.

Specifically, the evaporator 110 is formed between the evaporator reservoir 112 in which the liquid refrigerant is stored, the evaporation spray 113 for injecting the refrigerant into the cold water coil 111, and the evaporator reservoir 112 and the evaporation spray 113. And a refrigerant pump installed on the refrigerant first circulation pipe 114 and the refrigerant first circulation pipe 114 to circulate the refrigerant.

Evaporator 110 is formed in a hermetically sealed container to maintain a vacuum with a pressure of about 6.5 mmHg. At this time, the refrigerant takes heat of vaporization from the cold water flowing through the cold water coil 111 and evaporates at about 5 ° C. However, if evaporation is continued in the evaporator 110, the partial pressure of the vapor of the refrigerant is increased to increase the evaporation temperature, and thus an appropriate cooling capacity cannot be obtained. At this time, when the refrigerant vapor is absorbed by using the absorption liquid injected in the absorber 120, the evaporation pressure and the evaporation temperature in the evaporator 110 may be kept constant. As the absorbent liquid, for example, an aqueous LiBr solution may be used.

Absorber 120 is shown in the same closed vessel as the evaporator 110, but is not necessarily limited thereto. However, it is preferable that the absorber 120 and the evaporator 110 have a sealed structure in communication with each other.

The absorber 120 communicates with the evaporator 110 and absorbs the refrigerant vapor. In addition, the absorber 120 further includes an absorber spray 121 for spraying the concentrated absorbent liquid to increase the absorption effect. In addition, the absorber 120 is provided with an absorber coil 122 capable of removing the heat of absorption generated when the concentrated absorbent liquid absorbs the refrigerant vapor. Coolant supplied through the coolant pump 310 flows into the absorber coil 122.

If the absorbing action is continued in the absorber 120, the absorbing liquid contains a large amount of refrigerant vapor and becomes thinner. As a result, the absorbing action cannot continue. Therefore, in order to concentrate the diluted absorbent liquid, that is, the rare absorbent liquid, the diluted absorbent liquid is transmitted to the first regenerator 130.

The first regenerator 130 is connected to the absorber 120 by a pipe, and the rare absorbing liquid absorbing the refrigerant vapor flows in, and the rare absorbing liquid is heated to change into an intermediate absorbing liquid. To this end, the first regenerator 130 is provided with a burner 160 for directly burning gaseous fuel such as LNG as a heat source for heating the rare absorbent liquid. As a result, the rare absorption liquid is separated into a high temperature refrigerant vapor and an intermediate absorption liquid, and the state thereof changes.

However, the rare absorbent liquid cooled in the absorber 120 is required to be preheated in the process of being transmitted to the first regenerator 130 in order to improve the performance coefficient of the system. To this end, the low temperature heat exchanger 170 and the high temperature heat exchanger 180 may be further installed in the pipe connecting the absorber 120 and the first regenerator 130. The low temperature heat exchanger 170 preheats the rare absorbent liquid by heat exchange with the rare absorbent liquid just before the concentrated absorbent liquid formed in the second regenerator 140 to be described later is supplied to the absorber spray 121 along the pipe.

In addition, the high temperature heat exchanger 180 preheats the rare absorbent liquid preheated in the low temperature heat exchanger 170 to have a higher temperature. Specifically, the high temperature heat exchanger 180 is preheated in the low temperature heat exchanger 170 just before the intermediate absorbent liquid formed by the heat exchange in the first regenerator 130 is supplied to the second regenerator 140 along the pipe. Preheat the rare absorbent solution. To this end, the low-temperature heat exchanger 170 and the high-temperature heat exchanger 180 is disposed in the form of a coil through which the rare absorbent liquid, which is a heating element, flows.

The second regenerator 140 is connected to the first regenerator 130 by piping, and heats the intermediate absorbent liquid introduced into the concentrated absorbent liquid. To this end, the high temperature refrigerant vapor flowing into the second regenerator 140 moves along the second regenerator coil 142. The intermediate absorbent liquid injected through the second regenerator spray 141 is heated by heat exchange with the second regenerator coil 142. The concentrated absorbent liquid is collected at the bottom of the second regenerator 140, which is introduced into the low temperature heat exchanger 170 along the pipe, further cooled, and then flows into the absorber spray 121.

The second regenerator 140 and the condenser 150 are arranged to communicate in a single sealed container. The condenser 150 condenses the refrigerant vapor secondary generated in the second regenerator 140. To this end, a condenser coil 151 through which cooling water flows is disposed in the condenser 150. In addition, the condenser 150 is formed with a condenser reservoir tank 152 to store the cooled refrigerant vapor. The liquid refrigerant stored in the condenser reservoir 152 is supplied to the evaporator 110 along the pipe.

The cooling tower 200 cools the cooling water heat exchanged in the condenser 150. The cooling tower 200 serves to supply the cooling water supplied through the cooling water supply line 320 after cooling the cooling water introduced through the cooling water recovery line 310. On the other hand, the cooling water supply line 320 is connected to the absorber coil 122, the cooling water recovery line is connected to the condenser coil 151 and circulates.

Specifically, the cooling tower 200 is the first hermetically sealed container 210 is stored in the feed water is evaporated by the heat exchange of the feed water is injected from the outside supplied through the cooling water recovery line 310 and the cooling water recovery line 310 and Is disposed on the outside of the first hermetic container 210, the bet conveyed by the pump unit 220 and the pump unit 220 for sucking and boosting the bet is introduced into the upper side, by the pump unit 220 And a second container 230 in which the replenishment water to be transferred is stored.

In addition, the pump unit 220 includes a nozzle unit 221, a cross-sectional reduction unit 222 disposed in front of the nozzle unit 221, and a bet sucked between the nozzle unit 221 and the cross-sectional reduction unit 222. A suction part 224 disposed to form a negative pressure. Specifically, the first airtight container 210, the pump unit 220 and the second container 230 are the same as described in the first embodiment, the same reference numerals are applied and detailed description thereof will be omitted below.

As such, the vacuum cooler integrated refrigerator according to the first and second embodiments may be installed in the underground space entirely through a novel configuration that may replace this function instead of the conventional cooling tower. Therefore, piping work such as a duct connecting between the cooling tower and the refrigerator is unnecessary.

In addition, the refrigerator adopts a pump unit instead of a conventional pump, and has an effect of reducing noise and vibration by excluding a blower which is one component of a cooling tower. In addition, the refrigerator can minimize the amount of water consumed during its operation. At the same time, the freezer can improve its grade factor.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

Claims

A refrigerator having a refrigeration cycle by a compressor, a condenser, an expander and an evaporative condenser,

The evaporative condenser may include: a first airtight container in which the make-up water is evaporated and stored by heat exchange between the make-up water supplied and injected from the outside and the refrigerant vapor discharged from the compressor;

A pump unit disposed at an outer side of the first airtight container and configured to suction and increase the pressure of the bet; And

And a second container in which the bet flows upward, and a replenishment water is transferred and stored by the pump unit.
The method of claim 1,

The pump unit is a nozzle unit;

A section reduction unit disposed in front of the nozzle unit;

A cross-sectional enlargement unit communicating with the front of the cross-sectional reduction unit; And

And a suction unit, through which the bet is sucked and disposed between the nozzle unit and the cross-sectional reduction unit to form a negative pressure.
The method of claim 1,

The first airtight container is a water supply tank;

A supply water supply pipe for supplying supply water to the supply water tank; And

And a heat exchange coil for exchanging heat and refrigerant refrigerant flows in and out.
The method of claim 1,

The upper end of the first airtight container is formed with a discharge port for discharging the bet,

Inlet of the discharge port is a vacuum cooler integrated freezer is provided with an eliminator.
The method of claim 1,

An outlet for discharging the bet is formed at an upper end of the second container,

And a vacuum cooler integrated refrigerator having a vent pipe connected to the outlet to discharge the bet.
An evaporator in which refrigerant vapor is generated by evaporation;

An absorber in communication with the evaporator and absorbing the refrigerant vapor;

A first regenerator connected to the absorber and a pipe, the rare absorbing liquid absorbing the refrigerant vapor flows therein, and heating the rare absorbing liquid into an intermediate absorbing liquid;

A second regenerator connected to the first regenerator and a pipe to introduce the intermediate absorbent liquid and to heat the intermediate absorbent liquid into a concentrated absorbent liquid;

A condenser in communication with the second regenerator and condensing the refrigerant vapor generated in the second regenerator; And

And a cooling tower cooling the cooling water heat exchanged in the condenser.

The cooling tower includes a first hermetically sealed container in which the make-up is evaporated and stored by heat exchange between the make-up water supplied and injected from the outside and the cooling water introduced through the cooling water recovery line;

A pump unit disposed at an outer side of the first airtight container and configured to suction and increase the pressure of the bet; And

And a second container in which bet conveyed by the pump unit flows upward and a replenishment water conveyed by the pump unit is stored.
The method of claim 6,

The pump unit is a nozzle unit;

A section reduction unit disposed in front of the nozzle unit; And

And a suction unit, through which the bet is sucked and disposed between the nozzle unit and the cross-sectional reduction unit to form a negative pressure.