KR102225184B1 - Heat pump system - Google Patents

Abstract

The present invention relates to a heat pump system having a main condensing heat exchanger and a sub-cooler, capable of efficiently controlling a temperature of supercooled water of the sub-cooler. The heat pump system of the present invention comprises: a compressor; a main condenser; a load heat exchanger connected to an indoor load; a water tank; a water supply unit for discharging low-temperature water; a first water supply line for supplying the low-temperature water to a sub-cooler; a 3-way valve; a second water supply line; a first control valve provided on a path of a heat exchange fluid discharge line; a first temperature sensor for measuring a temperature of a heat exchange fluid; a second temperature sensor for measuring a temperature of a cooling fluid; and a control unit.

Description

Subcooler A heat pump system equipped with a main condensation heat exchanger and subcooler capable of efficient temperature control of supercooled water {HEAT PUMP SYSTEM}

The present invention relates to a heat exchange system, and more particularly, to a subcooler using low-temperature water in a storage tank as cold water for subcooling, and to a heat pump system having a main condensation heat exchanger capable of efficient temperature control of supercooled water and a subcooler. .

In general, in a cooler, refrigerant compressed at high temperature and high pressure in a compressor is condensed at medium temperature and high pressure in a condenser, and after being dried in a dryer, it is expanded while passing through an expansion device and sent to the evaporator. When the evaporator absorbs heat, it becomes a gas while absorbing heat, and is sent back to the compressor, completing one cycle.

At this time, the compressor, the condenser, and the outdoor fan are usually installed inside the outdoor unit, and the evaporator, the expansion device, and the indoor unit fan are installed inside the indoor unit.

Therefore, cooling is achieved by heat exchange between the low temperature refrigerant flowing through the evaporator and indoor air.

On the other hand, in a hot environment such as summer, the temperature of the refrigerant itself increases in the air conditioner, and condensation of the refrigerant may not be performed smoothly, and accordingly, expansion in the expansion valve may not be performed properly, and the expansion efficiency may decrease. Its own cooling efficiency is also lowered.

A refrigerant subcooling type air conditioner is applied to solve this problem.

The refrigerant subcooling type air conditioner applies a supercooler between the condenser and the expansion valve to supercool the refrigerant passing through the condenser, so that the expansion of the refrigerant is smoothly performed in the expansion valve at the rear end thereof.

In such a refrigerant subcooling type air conditioner, a method of using a storage tank provided in a building as necessary cold water for subcooling the refrigerant has been attempted.

However, when the low temperature water stored in the storage tank is used as cold water for subcooling, heat exchange between the low temperature water and the refrigerant is performed more than necessary, so that the heat exchanger consumes more energy than necessary, and thus the performance of the heat exchanger is degraded. There was.

In addition, when the low-temperature water heat-exchanged in the heat exchanger is recovered to the storage tank, there is a problem that the temperature of the low-temperature water stored in the storage tank rapidly increases.

Therefore, the problem to be solved by the present invention is that it is possible to utilize low-temperature water in the storage tank as a heat exchange medium for refrigerant for indoor cooling, heat exchange can be efficiently performed, and a sub that prevents deterioration of the performance of the heat exchanger. It is to provide a heat pump system including a main condensation heat exchanger and a subcooler capable of efficiently controlling the temperature of the cooler supercooled water.

According to an embodiment of the present invention, a heat pump system including a main condensation heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water includes a compressor; A four-way side connected to the compressor through a first refrigerant circulation line connected to a discharge side of the compressor and a refrigerant recovery line connected to an inlet side of the compressor; A main condenser connected to the four sides via a second refrigerant circulation line; A subcooler connected to the main condenser via a third refrigerant circulation line; A load heat exchanger connected to the subcooler through a fourth refrigerant circulation line, connected to the four sides through a fifth refrigerant circulation line, and connected to an indoor load for indoor cooling; Reservoir; A water supply unit provided inside or outside the storage tank and for discharging the low temperature water stored in the storage tank; A first water supply line connected to the water supply unit and the subcooler to supply low temperature water discharged through the water supply unit to the subcooler; A heat exchange fluid discharge line connected to the subcooler to discharge heat exchange fluid after heat exchange in the subcooler; A three-way valve including first to third ports, provided at an end of the heat exchange fluid discharge line so that the first port is connected to the heat exchange fluid discharge line, and configured to control the degree of opening of each port; A second branch branched from the first water supply line and connected to the second port of the three-way valve, and joins a part of the low temperature water supplied along the first water supply line to the heat exchange fluid discharged through the heat exchange fluid discharge line. Water supply line; A cooling fluid recovery line connected between the third port of the three-way valve and the storage tank to supply the cooled cooling fluid to the storage tank by combining the low temperature water and the heat exchange fluid; A first control valve provided on a path of the heat exchange fluid discharge line and configured to control an opening degree of the passage of the heat exchange fluid discharge line; A first temperature sensor provided on a path of the heat exchange fluid discharge line to measure a temperature of the heat exchange fluid flowing into the heat exchange fluid discharge line; A second temperature sensor provided on a path of the cooling fluid recovery line and measuring a temperature of the cooling fluid flowing into the cooling fluid recovery line; And controlling the degree of opening of the first control valve according to the temperature measured by the first temperature sensor, and controlling the degree of opening of each port of the three-way valve according to the temperature measured by the second temperature sensor. It characterized in that it comprises a control unit.

In one embodiment, the water supply unit, a buoy floating on the surface of the low-temperature water stored in the storage tank; A low-temperature water suction pipe connected to the bottom of the bugu and submerged in the water of the low-temperature water; A low temperature water discharge line connected to the first water supply line from the outlet of the low temperature water suction pipe; And a suction pump provided on the path of the low temperature water discharge line and pumped to suck low temperature water from the inside of the storage tank.

In one embodiment, a cooling fluid discharge pipe disposed on the inner bottom of the storage tank and including a plurality of discharge holes, and connected to one side of the cooling fluid discharge pipe from an end of the cooling fluid recovery line to provide the cooling fluid recovery line. It may further include a cooling fluid discharge member including a cooling fluid movement guide pipe for supplying the cooling fluid discharged in the direction of the storage tank through the inside of the cooling fluid discharge pipe.

According to the heat pump system including the main condensation heat exchanger and subcooler capable of efficient temperature control of the subcooler supercooled water according to the present invention, it is possible to use low temperature water in the storage tank as a heat exchange medium for refrigerant for indoor cooling, and When the water and the refrigerant are heat-exchanged, heat exchange can be performed efficiently so that the refrigerant reaches the temperature for indoor cooling by measuring the temperature of the fluid discharged from the heat exchanger, and preventing excessive energy consumption of the heat exchanger. It is possible to prevent the performance of the heat exchanger from deteriorating.

1 is a view for explaining a heat pump system including a main condensation heat exchanger and a subcooler capable of efficient temperature control of subcooler supercooled water according to an embodiment of the present invention.
2 is a view for explaining a heat pump system including a main condensation heat exchanger and a subcooler capable of efficiently controlling the temperature of subcooler supercooled water according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a heat pump system including a main condensing heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention. In the present invention, various modifications may be made and various forms may be applied, and specific 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 a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual size for clarity of the present invention.

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

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessive formal meaning unless explicitly defined in this application. Does not.

1 is a view for explaining a heat pump system including a main condensation heat exchanger and a subcooler capable of efficient temperature control of subcooler supercooled water according to an embodiment of the present invention.

Referring to FIG. 1, a heat pump system including a main condensing heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention includes a compressor 110, a four-way side 150, and a main Condenser 120, subcooler 130, load heat exchanger 140, storage tank 171, water supply unit 172, first water supply line 173, heat exchange fluid discharge line 175, three-way valve 182 ), a second water supply line 174, a cooling fluid recovery line 176, a first control valve 181, a first temperature sensor 191, a second temperature sensor 192, and a control unit (not shown). I can.

The compressor 110 compresses the refrigerant into a high-temperature and high-pressure state, and discharges the high-temperature and high-pressure refrigerant in one direction.

The four sides 150 means having four ports of the valve, one of the four ports is connected to the compressor 110 via the first refrigerant circulation line 161, and the other is the second refrigerant circulation The line 162 is connected to the main condenser 120, the other is connected to the load heat exchanger 140 through the fifth refrigerant circulation line 165, and the other is connected to the refrigerant recovery line 166. It may be configured to be connected to the compressor 110 by means of.

The main condenser 120 may be connected to the four sides 150 via the second refrigerant circulation line 162. For example, the main condenser 120 may be an air heat exchanger that exchanges heat with external air.

The subcooler 130 may be connected to the main condenser 120 via a third refrigerant circulation line 163.

The load heat exchanger 140 is connected to the subcooler 130 via the fourth refrigerant circulation line 164, and is connected to the four sides 150 via the fifth refrigerant circulation line 165, and cools the room. For this, it can be connected with the load in the room.

The water storage tank 171 may be installed in the building, and low temperature water is stored therein.

The water supply unit 172 is provided inside or outside the storage tank 171 and may discharge low temperature water stored in the storage tank 171. For example, the water supply unit 172 may include a discharge pipe 1721 for discharging the low temperature water by being connected to a lower side of the low temperature water, and an opening/closing valve 1722 installed on the discharge pipe 1721.

The first water supply line 173 is connected to the water supply unit 172, for example, the discharge pipe 1721 and the subcooler 130 of the water supply unit 172 to serve the low temperature water discharged through the water supply unit 172. It can be supplied to the cooler 130.

The heat exchange fluid discharge line 175 is connected to the sub cooler 130 to discharge the heat exchange fluid after heat exchange in the sub cooler 130 from the sub cooler 130. Here, the heat exchange fluid may mean a fluid heated after heat exchange between low temperature water and a refrigerant in the subcooler 130.

The three-way valve 182 includes first to third ports 1821, 1822, 1823, and ends of the heat exchange fluid discharge line 175 so that the first port 1821 is connected to the heat exchange fluid discharge line 175. It is provided in, and may be configured to be able to control the degree of opening of each of the ports (1821, 1822, 1823). For example, the degree of opening of each of the ports 1821, 1822, and 1823 of the three-way valve 182 may be electronically controlled.

The second water supply line 174 is branched from the first water supply line 173 and is connected to the second port 1822 of the three-way valve 182, and is part of the low temperature water supplied along the first water supply line 173 May be joined to the heat exchange fluid discharged through the heat exchange fluid discharge line 175.

The cooling fluid recovery line 176 is connected between the third port 1823 of the three-way valve 182 and the storage tank 171 so that the low temperature water and the heat exchange fluid merge to supply the cooled cooling fluid to the storage tank 171. have. Here, the cooling fluid may mean a fluid in a state in which the temperature of the heat exchange fluid is lowered by mixing the heat exchange fluid and low temperature water in a high temperature state by being heated.

The first control valve 181 may be provided on the path of the heat exchange fluid discharge line 175 and may be configured to control the degree of opening of the passage of the heat exchange fluid discharge line 175. For example, the first control valve 181 may be electronically controlled.

The first temperature sensor 191 may be provided on the path of the heat exchange fluid discharge line 175 to measure the temperature of the heat exchange fluid flowing into the heat exchange fluid discharge line 175.

The second temperature sensor 192 may be provided on the path of the cooling fluid recovery line 176 to measure the temperature of the cooling fluid flowing into the cooling fluid recovery line 176.

The control unit (not shown) controls the degree of opening of the first control valve 181 according to the temperature measured by the first temperature sensor 191, and the three-way valve ( It can be configured to control the degree of opening of each of the ports 1821, 1822, 1823 of 182.

Hereinafter, a heat exchange process of a heat pump system including a main condensation heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention will be described, and after the refrigerant circulation process is first described, The circulation process of low temperature water will be described.

Refrigerant circulation

First, a high-temperature and high-pressure refrigerant is discharged from the compressor 110, and the discharged refrigerant flows into the four sides 150 through the first refrigerant circulation line 161.

Subsequently, the refrigerant is guided in the direction of the second refrigerant circulation line 162 from the inside of the four sides 150 and flows into the main condenser 120 through the second refrigerant circulation line 162, and the heat exchange medium in the main condenser 120 , For example, it can be heat-exchanged with external air.

Subsequently, the refrigerant is discharged from the main condenser 120, and the discharged refrigerant may be introduced into the subcooler 130 through the third refrigerant circulation line 163 to exchange heat with the low-temperature water supplied from the storage tank 171. A process of supplying low temperature water from the storage tank 171 will be described in detail in the description of the low temperature water circulation process.

Subsequently, the refrigerant is discharged from the subcooler 130, and the discharged refrigerant is introduced into the load heat exchanger 140 through the fourth refrigerant circulation line 164, and is a heat exchange medium, for example, a low-temperature hot water exchanged from the room. After heat exchange with water, cold air for indoor cooling can be supplied to the room.

Subsequently, the refrigerant is discharged from the load heat exchanger 140, and the discharged refrigerant may flow into the four sides 150 through the fifth refrigerant circulation line 165.

Subsequently, the refrigerant may be guided in the direction of the refrigerant recovery line 166 inside the four sides 150 and recovered to the compressor 110 through the refrigerant recovery line 166.

Circulation of cold water

The low-temperature water in the storage tank 171 is discharged through the water supply unit 172, and the discharged low-temperature water is supplied to the main condenser 120 through the first water supply line 173, and the refrigerant and low-temperature water from the main condenser 120 Low temperature water is heated by heat exchange.

Subsequently, the heat exchange fluid is discharged from the main condenser 120 through the heat exchange fluid discharge line 175. At this time, the first temperature sensor 191 provided on the path of the heat exchange fluid discharge line 175 measures the temperature of the heat exchange fluid. The measured value can be input in real time to the control unit, and the control unit controls the degree to which the first control valve 181 opens the passage of the heat exchange fluid discharge line 175 according to the measured value input from the first temperature sensor 191 can do. For example, the flow rate of the heat exchange fluid can be adjusted by adjusting the degree of opening of the first control valve 181 so that the temperature of the heat exchange fluid measured by the first temperature sensor 191 becomes 40°C, and the temperature of the heat exchange fluid When is 40° C., the opening of the first control valve 181 may be fixed. In this case, the temperature of 40° C. may be a target temperature of the heat exchange fluid. In this way, the controller may adjust the degree of opening of the first control valve 181 until the temperature of the heat exchange fluid reaches the target temperature, and then fix the open state of the first control valve 181 when the target temperature is reached. The heat exchange process by controlling the temperature is to cool the refrigerant passing through the main condenser 120 to a temperature close to a target cooling temperature for indoor cooling.

In this process, a part of the low temperature water from the second water supply line 174 may be introduced through the second port 1822 of the 3-way valve 182 to be joined to the heat exchange fluid, and at this time, the temperature of the heat exchange fluid is Since they are joined, the temperature may be lower than the temperature when flowing into the first port 1821 of the three-way valve 182 from the heat exchange fluid discharge line 175. For example, it can be lowered to 35°C or less.

Subsequently, after the low-temperature water and the heat exchange fluid are mixed through the three-way valve 182, the cooling fluid may be discharged through the third port 1823 of the three-way valve 182. At this time, the second temperature sensor 192 measures the temperature of the cooling fluid. The measured value may be input to the controller in real time, and the controller may adjust the degree of opening of the third port 1823 of the three-way valve 182 according to the measured value input from the second temperature sensor 192. For example, the flow rate of the cooling fluid can be adjusted by adjusting the degree of opening of the third port 1823 of the three-way valve 182 so that the temperature of the heat exchange fluid measured from the second temperature sensor 192 is 30°C. In addition, when the temperature of the cooling fluid reaches 30° C., the opening of the three-way valve 182 can be fixed. In this case, the temperature of 30° C. may be a target temperature of the cooling fluid. In this way, the control unit adjusts the degree of opening of the three-way valve 182 until the temperature of the cooling fluid reaches the target temperature, and then, when the temperature reaches the target temperature, the third port 1823 of the three-way valve 182 is opened. Can be fixed. This process is because when the temperature of the cooling fluid exceeds 30°C, the temperature of the fluid supplied to the storage tank 171 becomes excessively high, so that when the storage tank 171 is used for hot water, it can be utilized only as hot water.

Subsequently, the temperature-controlled cooling fluid may be supplied to the storage tank 171 through the cooling fluid recovery line 176.

The heat pump system including a main condensation heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention is a heat exchange medium for refrigerant for indoor cooling. It can be utilized, and heat exchange can be performed efficiently so that the refrigerant reaches the temperature for indoor cooling by measuring the temperature of the fluid discharged from the heat exchanger when the low-temperature water and refrigerant are heat-exchanged. By preventing excessive energy consumption, it is possible to prevent the performance of the heat exchanger from deteriorating.

2 is a view for explaining the configuration of a heat pump system including a main condensing heat exchanger and a subcooler capable of efficiently controlling the temperature of subcooler supercooled water according to another embodiment of the present invention.

Referring to FIG. 2, in a heat pump system including a main condensing heat exchanger and a subcooler capable of efficient temperature control of subcooler supercooled water according to another embodiment of the present invention, A sub according to an embodiment of the present invention, except that the water suction pipe 2722, the low temperature water discharge line 2722, and the suction pump 2724 are included, and the heat exchange system further includes a cooling fluid discharge member 300. Cooler Since it is the same as a heat pump system including a main condensing heat exchanger and a subcooler capable of efficient temperature control of the supercooled water, the water supply unit 272 and the cooling fluid discharge member 300 will be described below.

The water supply unit 272 may include a buoy 2721, a low temperature water suction pipe 2722, a low temperature water discharge line 2722, and a suction pump 2724.

The buoy 2721 may be floated on the surface of the low-temperature water stored in the storage tank 171. There is no particular limitation on the material of the accessory 2721, and may be, for example, a rubber material.

The low-temperature water suction pipe 2722 may be connected to the bottom surface of the buoy 2721 and may be provided to be immersed in the water of the low-temperature water. For example, the low-temperature water suction pipe 2722 may be provided in a hollow cylindrical shape, one side of the low-temperature water suction pipe 2722 may form an inlet and the opposite side of the inlet may form an outlet, and the longitudinal direction is the water surface of the low-temperature water. It can be placed underwater to be parallel to. The low-temperature water suction pipe 2722 may have a heavier weight than the bugu 2721. For example, it may be a metal pipe, and the buoy 2721 may be provided to have a buoyancy capable of withstanding the weight of the metal pipe.

The low temperature water discharge line 2722 may be connected to the first water supply line 173 from the outlet of the low temperature water suction pipe 2722. For example, the low temperature water discharge line 2722 may be a flexible tube.

The suction pump 2724 may be provided on a path of the low temperature water discharge line 2722 and may be pumped and driven so that low temperature water is sucked from the inside of the storage tank 171 in the direction of the first water supply line 173.

The cooling fluid discharge member 300 may include a cooling fluid discharge pipe 310 and a cooling fluid movement guide pipe 320.

The cooling fluid discharge pipe 310 is disposed on the inner floor of the water storage tank 171 and may include a plurality of discharge holes 311. For example, the cooling fluid discharge pipe 310 may be provided in the form of a cylindrical pipe that is long in the horizontal direction of the water storage tank 171, is hollow, and has both ends blocked, and has a plurality of discharge holes 311 in the longitudinal direction of the cylindrical pipe. Can be arranged.

The cooling fluid movement guide pipe 320 is connected to one side of the cooling fluid discharge pipe 310 from the end of the cooling fluid recovery line 176 and discharged in the direction of the storage tank 171 through the cooling fluid recovery line 176. May be supplied into the cooling fluid discharge pipe 310. For example, the cooling fluid movement guide pipe 320 may be a hollow cylindrical pipe perpendicular to the cooling fluid discharge pipe 310, and the upper end of the cylindrical pipe may be connected to the end of the cooling fluid recovery line 176.

Hereinafter, a circulating process of low temperature water in a heat pump system including a main condensing heat exchanger and a subcooler capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention will be described.

First, the low temperature water in the storage tank 171 may be discharged through the water supply unit 272.

At this time, the suction pump 2724 is operated, and the low temperature water in the water storage tank 171 by the pumping operation of the suction pump 2724 is a low temperature water suction pipe 2722 located in the water close to the water surface of the low temperature water by the buoy 2721. ) Through the low-temperature water flows, the inflow of low-temperature water is supplied to the first water supply line 173 by moving along the low-temperature water discharge line (2723).

Subsequently, the low-temperature water is supplied to the main condenser 120 through the first water supply line 173, and the low-temperature water is heated by heat exchange between the refrigerant and the low-temperature water in the main condenser 120.

Subsequently, the heat exchange fluid is discharged from the main condenser 120 through the heat exchange fluid discharge line 175, and at this time, the heat exchange fluid goes through the process of adjusting the flow rate of the heat exchange fluid according to the temperature measurement described above. ) May be introduced into the first port 1821.

In this process, a part of the low temperature water from the second water supply line 174 may be introduced through the second port 1822 of the three-way valve 182 to be joined to the heat exchange fluid.

Subsequently, after the low-temperature water and the heat exchange fluid are mixed through the three-way valve 182, the cooling fluid may be discharged through the third port 1823 of the three-way valve 182. At this time, the cooling fluid whose temperature is lowered through the process of adjusting the flow rate of the cooling fluid according to the temperature measurement described above may move in the direction of the storage tank 171 along the cooling fluid recovery line 176.

Subsequently, the cooling fluid is discharged from the end of the cooling fluid recovery line 176, and the discharged cooling fluid flows into the cooling fluid movement guide pipe 320 and then moves along the cooling fluid movement guide pipe 320 to discharge the cooling fluid. It may be introduced into the inside of the tube 310.

Finally, the cooling fluid flowing into the cooling fluid discharge pipe 310 may be discharged from the inner bottom of the storage tank 171 through the discharge hole 311 into the water of the storage tank.

Through this process, the cooling fluid discharged into the low-temperature water in the storage tank 171 because it has a higher temperature than the low-temperature water does not rapidly increase the temperature of the low-temperature water even if it is mixed with the low-temperature water in the storage tank 171, and thus the storage tank 171 The temperature of the low temperature water in the storage tank 171 supplied to the first water supply line 173 through the water supply unit 172 at the water surface of the inside may be supplied to the first water supply line 173 without rising. have.

The heat pump system including the main condensing heat exchanger and sub-cooler capable of efficiently controlling the temperature of the subcooler supercooled water according to another embodiment of the present invention has a large amount close to the maximum capacity that can store low-temperature water in the storage tank 171. It is easy to use when the quantity is full.

In addition, even if the low-temperature water heat-exchanges with the refrigerant and the fluid after heat-exchange with the refrigerant having a higher temperature than the low-temperature water is supplied to the storage tank 171, the temperature of the low-temperature water stored in the storage tank 171 does not rise rapidly, and accordingly, Even in the process of supplying the fluid whose temperature has risen after heat exchange, the temperature of the low temperature water in the storage tank 171 used for heat exchange may be constantly maintained.

On the other hand, the subcooler 130 and the load heat exchanger 140 of each case of a heat pump system including a main condensation heat exchanger and a subcooler capable of efficient temperature control of the subcooler supercooled water according to an embodiment of the present invention On the outer surface, an antifouling coating layer made of a composition for antifouling coating may be applied so as to effectively prevent adhesion and removal of contaminants.

The antifouling coating composition contains mercaptobenzothiazole and amidoalkyl betaine in a molar ratio of 1:0.01 to 1:2, and the total content of mercaptobenzothiazole and amidoalkyl betaine is 1 with respect to the total aqueous solution. ~10% by weight.

The mercaptobenzothiazole and amidoalkyl betaine are preferably 1:0.01 to 1:2 as a molar ratio.If the molar ratio is out of the above range, the coating property of the substrate decreases or the surface moisture adsorption increases after application. There is a problem that the film is removed.

The mercaptobenzothiazole and amidoalkyl betaine are preferably 1 to 10% by weight in the total aqueous solution of the composition, and if it is less than 1% by weight, there is a problem that the coating property of the substrate is deteriorated, and if it exceeds 10% by weight, the coating film thickness Crystal precipitation is liable to occur due to an increase in.

On the other hand, as a method of applying the present antifouling coating composition onto a substrate, it is preferable to apply it by a spray method. In addition, the thickness of the final coating film on the substrate is preferably 550 to 2000 Å, more preferably 1100 to 1900 Å. If the thickness of the coating film is less than 550 Å, there is a problem of deterioration in the case of high-temperature heat treatment, and if it exceeds 2000 Å, crystal precipitation on the coated surface is liable to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of mercaptobenzothiazole and 0.05 mol of amidoalkyl betaine to 1000 ml of distilled water, followed by stirring.

On the other hand, in order to prevent corrosion of the metal surface of the main condenser 120 of the main condensing heat exchanger capable of efficiently controlling the temperature of the subcooler supercooled water according to an embodiment of the present invention and a heat pump system having a subcooler, An anti-corrosion layer may be applied to the outer surface of the case of the condenser 120.

The surface coating material of the corrosion protection layer is benztriazole 15% by weight, ethylene glycol butyl ether 25% by weight, hafnium 20% by weight, molybdenum emulsified (MoS2) 10% by weight, titanium oxide (TiO2) 15% by weight, phenol noblock type gly Consisting of 15% by weight of cidyl ether, the coating thickness can be formed to 8㎛.

Benztriazole, ethylene glycol butyl ether, and phenol noblock glycidyl ether play a role in preventing corrosion and discoloration.

Hafnium is a transition metal element with corrosion resistance and plays a role in having excellent waterproof and corrosion resistance.

Molybdenum emulsified plays a role of imparting wetness and lubricity to the surface of the coating film.

Titanium oxide is added for the purpose of fire resistance and chemical stability.

The reason why the ratio of the constituent components and the coating thickness were numerically limited as described above is that the present inventors have repeatedly failed several times and analyzed through the test results, and as a result, the optimum anti-corrosion effect was exhibited at the ratio.

The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

110: compressor 120: main condenser
130: sub cooler 140: load heat exchanger
150: four sides 161: first refrigerant circulation line
162: second refrigerant circulation line 163: third refrigerant circulation line
164: fourth refrigerant circulation line 165: fifth refrigerant circulation line
166: refrigerant recovery line 171: reservoir
172, 272: water supply part 173: first water supply line
174: second water supply line 175: heat exchange fluid discharge line
176: cooling fluid recovery line 181: first control valve
182: 3-way valve 191: first temperature sensor
192: second temperature sensor

Claims (3)

Compressor 110;
A four-way side 150 connected to the compressor 110 through a first refrigerant circulation line 161 connected to the discharge side of the compressor 110 and a refrigerant recovery line 166 connected to the inlet side of the compressor 110. );
A main condenser 120 connected to the four sides 150 via a second refrigerant circulation line 162;
A subcooler 130 connected to the main condenser 120 via a third refrigerant circulation line 163;
It is connected to the subcooler 130 via a fourth refrigerant circulation line 164, and is connected to the four sides 150 via a fifth refrigerant circulation line 165, and an indoor load for indoor cooling Load heat exchanger 140 connected to;
A storage tank 171;
Water supply units 172 and 272 provided inside or outside the storage tank 171 and for discharging the low temperature water stored in the storage tank 171;
A first water supply line 173 connected to the water supply unit 172 and the subcooler 130 to supply low temperature water discharged through the water supply unit 172 to the subcooler 130;
A heat exchange fluid discharge line 175 connected to the sub cooler 130 to discharge heat exchange fluid after heat exchange in the sub cooler 130;
It includes first to third ports 1821, 1822, 1823, and is provided at the end of the heat exchange fluid discharge line 175 so that the first port 1821 is connected to the heat exchange fluid discharge line 175, respectively A three-way valve 182 configured to be able to control the degree of opening of the ports 1821, 1822, 1823;
Branched from the first water supply line 173 and connected to the second port 1822 of the three-way valve 182, the heat exchange fluid discharges part of the low temperature water supplied along the first water supply line 173 A second water supply line 174 for joining the heat exchange fluid discharged through the line 175;
A cooling fluid recovery line connected between the third port 1823 of the three-way valve 182 and the storage tank 171 to supply the cooling fluid cooled by the confluence of the low temperature water and the heat exchange fluid to the storage tank 171 (176);
A first control valve 181 provided on the path of the heat exchange fluid discharge line 175 and configured to control the degree of opening of the passage of the heat exchange fluid discharge line 175;
A first temperature sensor 191 provided on the path of the heat exchange fluid discharge line 175 to measure the temperature of the heat exchange fluid flowing into the heat exchange fluid discharge line 175;
A second temperature sensor 192 provided on the path of the cooling fluid recovery line 176 to measure the temperature of the cooling fluid flowing into the cooling fluid recovery line 176; And
Controls the degree of opening of the first control valve 181 according to the temperature measured by the first temperature sensor 191, and the three-way valve 182 according to the temperature measured by the second temperature sensor 192 And a control unit configured to control the degree of opening of each of the ports 1821, 1822, 1823;
The water supply unit 272,
A buoy (2721) floating on the surface of the low-temperature water stored in the storage tank (171); A low-temperature water suction pipe (2722) connected to the bottom of the bugu (2721) and submerged in the water of the low-temperature water; A low temperature water discharge line (2723) connected to the first water supply line (173) from the outlet of the low temperature water suction pipe (2722); And a suction pump (2724) provided on the path of the low temperature water discharge line (2723) and driven to pump the low temperature water from the inside of the storage tank (171).
The cooling fluid discharge pipe 310 disposed on the inner bottom of the storage tank 171 and including a plurality of discharge holes 311 and the cooling fluid discharge pipe 310 from the end of the cooling fluid recovery line 176 A cooling fluid including a cooling fluid movement guide pipe 320 connected to one side and supplying the cooling fluid discharged in the direction of the storage tank 171 through the cooling fluid recovery line 176 into the cooling fluid discharge pipe 310 Characterized in that it further comprises a discharge member 300,
Subcooler A heat pump system equipped with a main condensation heat exchanger and subcooler capable of efficient temperature control of supercooled water. delete delete

Images