KR200273591Y1 - Heat exchanger for regenerative air-conditioning unit using phase change material - Google Patents

Abstract

The present invention relates to a heat exchanger used in a cold storage type air conditioner using a phase change material that is used to obtain excellent cooling effect at a low cost by using latent heat according to a temperature difference through a phase change material. And a cooling radiator, wherein the main body case includes an inlet pipe and an outlet pipe communicating with the cooling water pipe, and a refrigerant pipe communicating with the cooler, wherein the PCM is a hollow body filled with a phase change material therein. A plurality of cooling water is provided in the main body case, and the cooling radiator is a heat dissipation device formed of a plurality of corrugated pipes spaced at intervals, and is in communication with a cooler through the refrigerant pipe. In addition to reducing the economic and time burden required for production and maintenance operations, Effect can be obtained that suhan heat exchange efficiency.

Description

Heat exchanger of cold storage type air conditioner using phase change material {HEAT EXCHANGER FOR REGENERATIVE AIR-CONDITIONING UNIT USING PHASE CHANGE MATERIAL}

The present invention relates to a cold storage type air conditioner, and more particularly, to a cold storage type air conditioner using a phase change material used to obtain an excellent cooling effect at a low cost by using latent heat according to a temperature difference through a phase change material. It relates to a heat exchanger used.

In general, an air conditioner needs a cycle of recovering a gaseous refrigerant by evaporation and returning it to a liquid. A mechanism for returning and circulating the refrigerant evaporated in this manner to the original liquid is called a refrigeration cycle. There are two methods, such as a compression type and an absorption type. The compression type is a mechanical method using a compressor, and the absorption type is a method of chemically liquefying a refrigerant.

The refrigeration cycle of the cooling device uses a compressed refrigerator. The compressor is integrally formed with a motor and a compression unit, which are enclosed in a hermetic container to be completely sealed, and are connected by welding or the like so as not to leak, and a refrigerant such as Freon is enclosed therein. The refrigerant is compressed in high temperature and high pressure by a compressor as a gas phase to liquefy condensation. The liquefied refrigerant flows through the capillary and flows into the evaporator and at the same time takes heat away from the evaporator and evaporates. The evaporated refrigerant turns into gas and is sucked back into the compressor, and this circulation is repeatedly performed. A blower is installed at a position close to the evaporator, passing hot air in the room, converting it into cold air, and blowing it back to the room. Cooling the room while repeating these operations is a cooling device.

However, the above-described conventional air conditioner is configured to perform the same function without distinguishing between day and night, and has a limitation in that it cannot use cheap midnight power because there is no cold heat storage means for storing cold heat separately. .

Accordingly, there is a need to develop a cooling device having a cooling heat storage means by improving the problem of the conventional cooling device.

FIG. 7 is a configuration diagram schematically showing a cooling heat storage air conditioner according to the prior art. As shown in the drawing, the main body case 110 in which a predetermined storage space is formed is provided in the cooling heat storage air conditioner 100 according to the prior art. And a cold storage tank 120 positioned inside the main body case 110 and storing a liquid cold storage material 122 therein, and evaporation embedded in the cold storage material 122. The coil 130, the compressor 140 for forcibly circulating the refrigerant into the evaporation coil 130 to cool the cold storage material 122 to a predetermined temperature, and the cooled liquid cold storage material 122 is circulated A circulation pipe 150 connected to the cold storage tank 120 and the cold storage material 122 flow in the circulation pipe 150 to radiate cold air in the middle of the circulation pipe 150. Forcibly circulating the cooling radiator 160 and the cold storage material 122 formed in the circulation pipe 150. At the same time, the fan coil 170 is installed in the middle of the circulation pipe 150 so as to blow the cool air around the cooling radiator 160 to the outside front of the main body case.

However, in the cooling apparatus having the cold heat storage means according to the prior art as described above, the temperature of the phase change material is lowered by simply using a low-cost midnight power band, and then used only. Because it does not utilize the low temperature of the outside air, there were many deficiencies in the efficient use of energy. In particular, there is a lot of heat generation like a booth equipped with communication equipment, but even if the air conditioner is to be operated even in winter to prevent malfunction due to heat generated, it must be cooled only by the operation of the air conditioner. There was a problem.

In this regard, the inventors have registered a patent (application number: 10-2001-44456) and utility model registration in the Republic of Korea for a cold storage cooling device using a phase change material as of July 24, 2001 in order to solve the above problems. No. 20-2001-22349.

FIG. 8 is a block diagram schematically illustrating a cooling storage type air conditioner using a phase change material as described in the above application. In the cooling storage type cooling device using a phase change material, a storage tank 20 in which a phase change material 24 is stored is shown. ), A heat exchange pipe 26 installed through the inside and the outside of the storage tank 20 in a state of being embedded in the phase change material 24, and connected to one side end of the heat exchange pipe 26. The indoor heat exchanger 22 is installed inside the), the circulation pump 38 is connected to the indoor heat exchanger 22 and the pipe, the control valve 40 is connected to the circulation pump 38 and the pipe And a first cooling water pipe 42 branched from the control valve 40 and a second cooling water pipe 44 branched from the control valve 40 and having an outdoor heat exchanger 48. The first coolant pipe 42 and the second coolant pipe 44 are agitated to cool the cooler 46. Passed through and connected to the heat exchange pipe 26, the first temperature sensor 52 for sensing the temperature of the object 10, and the second temperature sensor for sensing the temperature of the cooling water exited through the indoor heat exchanger 22 ( 54, a third temperature sensor 56 for sensing a temperature outside the object 10, and a fourth temperature sensor 58 for sensing a temperature of the phase change material 24 stored in the storage tank 20. Characterized in that made.

However, the cold storage type cooling apparatus using the phase change material according to the present inventors as described above is stored in the storage tank 20 and the phase change material 24 in which the phase change material 24 is stored. In constructing the heat exchange pipes 26 installed through the inside and the outside of 20), in order to increase the heat transfer area, the contact area should be increased by maximizing the overlapping refractive index of the heat exchange pipes 26, and accordingly, There was a problem of increased cost, and there was a problem in maintenance, maintenance, and efficient device management even after installation of the device.

In addition, there was a demand to optimize the heat transfer efficiency of the phase change material.

The present invention has been made to solve the problems described above, to provide a heat exchanger of a cold storage type cooling device using a phase change material that can reduce the production cost with a simple configuration as well as maximize the heat transfer efficiency. For the purpose of

1 is a schematic view showing a cooling heat storage cooling device using a phase change material according to the present invention;

2 is a perspective view showing a heat exchanger according to the present invention,

3 is a perspective view and a partially enlarged view showing another embodiment of a heat exchanger according to the present invention;

Figure 4 is a perspective view showing another embodiment of the heat exchanger according to the present invention,

5 is a perspective view showing another embodiment of a heat exchanger according to the present invention;

6 is a cross-sectional view showing another embodiment of a heat exchanger according to the present invention;

7 is a configuration diagram schematically showing a cold storage type cooling device according to the prior art,

8 is a schematic view showing a cooling heat storage cooling device using a phase change material.

<Description of the symbols for the main parts of the drawings>

10 ... object, 22 ... indoor heat exchanger,

24 phase change material, 38 circulating pump,

40 ... control valve, 42 ... 1st coolant piping,

44 second coolant piping, 46 chiller,

48 ... outdoor heat exchanger, 70 ... heat exchanger,

71 body case, 73 incoming piping,

75 ... withdrawal pipe, 77 ... PCM object,

79 refrigerant refrigerant, 81 radiator,

82 ... indoor heat exchanger, 83 ...

85 ... dispersion fan, 87 ... motor,

89 agitator, 91 chilled water piping,

93.

The present invention, in order to achieve the object as described above, in the heat exchanger of a cold storage type air conditioner using a phase change material, the heat exchanger is composed of a body case, a PCM object and a cooling radiator, the body case is in communication with the cooling water pipe And a refrigerant pipe communicating with the cooler, wherein the PCM object is a hollow body filled with a phase change material therein, and a plurality of cooling water inside the body case are provided. The cooling radiator is a heat dissipation device formed of a plurality of corrugated pipes spaced apart from each other, and is in communication with the cooler through the refrigerant pipe.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a configuration diagram schematically showing a cooling heat storage cooling device using a phase change material according to the present invention, Figure 2 is a perspective view showing a heat exchanger according to the present invention.

As shown in the figure, the heat exchanger 70 of the cold storage type air conditioner according to the present invention is composed of a main body case 71, a PCM object 77 and a cooling radiator 81.

The main body case 71 is a hollow body having an inlet pipe 73 at one end and an outlet pipe 75 at the other end, wherein the inlet pipe 73 and the outlet pipe 75 are cooling water in which cooling water of a cooling device flows. In communication with the pipe 91, the cooling water is filled in the internal cavity of the drawing pipe 73, the drawing pipe 75, and the main body case 71.

In addition, a coolant pipe 79 is provided in place of the main body case 71 to communicate with the cooler 46.

The PCM object 77 is a hollow body, and the phase change material 24 is filled therein, and the phase change material 24 uses latent heat storage absorbed and released at an isothermal temperature when the phase of the material changes. As the material for the storage material, the transition temperature of the storage material is the desired temperature range, the heat capacity and the latent heat is large, the supercooling phenomenon is small, and it is chemically stable. , Fatty acids and the like. In addition, the inorganic salt, paraffin wax, fatty acids, etc. in the freezing point occurs a lot, but a constant phase change, water having an excellent effect on the latent heat will also be a phase change material. Therefore, the phase change material in this invention can also be interpreted including water.

The envelope surrounding the phase change material 24 of the PCM object 77 may be any of metals and plastics as long as the heat transfer with the coolant is excellent and the condition that the phase change material does not leak is satisfied. . In addition, the outer shell surrounding the phase change material 24 of the PCM individual 77 may be configured in a slit, but may also be configured in a form having a plurality of wrinkles. This is to obtain the effect of increasing the heat transfer area of the PCM object 77.

In addition, in this embodiment, the shape of the PCM object 77 is spherical, but any shape such as a hemispherical shape or a tetrahedron may be used as long as the cavity is provided therein.

The PCM object 77 is provided with a plurality of cooling water filled in the internal cavity of the main body case 71, the size and number of the PCM object 77 has the required cooling efficiency and phase change material It is configured to be adjustable in consideration of the amount of latent heat and the like.

This embodiment is configured by filling the PCM object 77 in the inner space of the main body case 71. Even in the above state, a certain space is formed between each PCM object 77, and the cooling water is interposed in the space or the cooling water moves through the space.

In FIG. 2, only the state in which the PCM object 77 is filled in the left side of the inner space of the main body case 71 partitioned by the cooling radiator 81 is shown. However, the configuration of the cooling radiator 81 is illustrated in the drawing. It is only for illustration, and it is comprised by filling the PCM object 77 in both left and right spaces.

A cooling radiator 81 is provided at the center of the main body case 71. The cooling radiator 81 is a heat radiation device having a plurality of corrugated pipes 83, and communicates with the cooler 46 through the refrigerant pipe 79. In addition, between the corrugated pipe 83 of the cooling radiator 81 is spaced apart at a suitable interval to allow the cooling water to flow.

As described above, the size and number of PCM objects 77 to be filled in the main body case 71 can be adjusted in consideration of the required cooling efficiency and the amount of latent heat of the phase change material. If the required degree of cooling is small or the amount of latent heat of the phase change material is excessive, the number of PCM objects 77 filled in the main body case 71 can be reduced. In this case, each of the PCM objects 77 should be dispersed in the cooling water inside the main body case 71. This is to increase the heat transfer efficiency.

On the other hand, the phase change material (phase change material) is usually greater than the specific gravity, so under the above-described configuration, the PCM object filled with the phase change material is present in a state that is sinking in the lower end without being sufficiently dispersed in the cooling water. high portential.

Therefore, as shown in FIG. 3, in constructing the PCM object 77, the entire cavity inside the PCM object 77 is filled up to a certain volume without filling the phase change material 24 in the entire cavity. It is preferable to form the base portion 93 to form. The gas portion 93 in the PCM object 77 is sufficient to enable the neutral buoyancy, thereby not sinking to the lower end of the main body case 71, by the flow of the coolant in the state of rising above a certain height While easily moving inside the main body case 71, a plurality of PCM objects 77 are generally dispersed in the main body case 71. In addition, the PCM object 77 having the gas part 93 as described above can also obtain the effect of acting as a margin for volume expansion when the phase change material 24 therein is frozen.

A configuration in which the heat exchanger 70 according to the present invention having the configuration as described above is installed in a cold storage type air conditioner using a phase change material will be described. As shown in FIG. 1, the withdrawal pipe 75 of the heat exchanger 70 communicates with an indoor heat exchanger 22 installed inside the object 10, and is connected to the indoor heat exchanger 22. Circulating pump 38 connected to the control valve, a control valve 40 connected to the circulation pump 38 and a pipe, a first cooling water pipe 42 branched from the control valve 40, and the control valve ( Branched at 40, and comprises a second cooling water pipe 44 having an outdoor heat exchanger (48), wherein the first cooling water pipe 42 and the second cooling water pipe 44 are combined to the heat exchanger. In communication with the inlet pipe 73 of (70).

In addition, the cooler 46 is in communication with the cooling radiator 81 of the heat exchanger 70 through the refrigerant pipe (79).

In the present embodiment, the heat exchanger 70 is installed outside of the object, but the inside of the object 10 is considered in consideration of field conditions or installation conditions of the object 10, such as the size of the object 10 or the arrangement of devices that require internal cooling. Or it may be installed on either side.

Figure 4 is a perspective view showing another embodiment of the heat exchanger according to the present invention, this embodiment is a state in which the phase change material completely filled or partially filled state of the PCM object 77, even if it is a better dispersion state It is provided with a dispersion means to achieve.

As shown in the accompanying drawings, according to the present embodiment, a distribution fan 85 is installed at the lower end of the main body case 71, and a motor 87 is provided to rotate it.

The distribution fan 85 and the motor 87 may be installed on the left and right sides partitioned by the cooling radiator 81, and according to the capacity of the distribution fan 85 and the motor 87, the lower portion of the main body case 71 You can also install one.

FIG. 5 is a perspective view showing still another embodiment of the heat exchanger according to the present invention, in which a stirrer 89 is employed instead of the dispersion fan 85 as the dispersing means employed in the embodiment of FIG. 4.

As shown in the figure, the stirrer 89 is a spiral rod-shaped body, which rotates or directly cools the cooling water inside the main body case 71 while performing a spiral rotational motion by driving the motor 87. Collisions are allowed to collide with the object 77.

The stirrer 89 and the motor 87 are provided on the left and right sides partitioned by the cooling radiator 81.

Figure 6 is a cross-sectional view showing another embodiment of the heat exchanger according to the present invention, is configured by varying the shape of the main body case 71 of the present invention.

As shown in the figure, the interior of the main body case 71 is provided with a top partition wall 95 extending downward from the upper end and a bottom partition wall 97 extending upward from the lower end, respectively. The upper and lower partition walls 95 and 97 extend only to a predetermined length starting from the upper and lower ends of the main body case 71 connected to each other, so that a predetermined open space can be formed at each upper or lower portion. do.

The upper and lower partitions (95, 97) as described above serves to partition the body case 71 to a predetermined length and to form a flow path of the cooling water. That is, when the coolant passes through the main body case 71 without the partition wall, the coolant is about to move the shortest distance from the inlet pipe 73 to the outlet pipe 75, so that the coolant comes into contact with the PCM object 77. Is limited, but the upper and lower partitions 95 and 97 provide a constant flow path, whereby coolant moves in contact with the PCM object 77 evenly distributed throughout the flow path. As a result, efficient heat transfer is possible.

According to the present invention, it is possible to increase the heat exchange efficiency through the phase change material through a simpler structure as well as to obtain the time and economic savings required for manufacturing. In addition, the convenience of installation, maintenance and simplicity of operation can be guaranteed.

In addition, according to the present invention, it is possible to achieve the effect of heat exchange, that is, a substantial increase in the heat transfer area, of the entire cooling water by configuring the packing structure of the PCM object, or by dispersing and dispersing it through a dispersion fan or agitator.

Claims (7)

In the heat exchanger of a cold storage type air conditioner using a phase change material, The heat exchanger is composed of a body case, a PCM object and a cooling radiator, The main body case has an inlet pipe and an outlet pipe communicating with the cooling water pipe, and a refrigerant pipe communicating with the cooler. The PCM object is a hollow body filled with a phase change material therein, a plurality of cooling water in the body case is provided, The cooling radiator is a heat dissipation device formed of a plurality of corrugated pipes spaced apart at intervals, the heat exchanger of a cold storage type cooling device using a phase change material, characterized in that in communication with the cooler through the refrigerant pipe. The method of claim 1, The PCM object is a heat exchanger of a cold storage type cooling device using a phase change material, characterized in that the spherical body. The method of claim 1, The outer shell surrounding the phase change material of the PCM individual is a heat exchanger of a cold storage type air conditioner using a phase change material, characterized in that the form having a plurality of wrinkles. The method of claim 1, The PCM object is a heat exchanger of a cold storage type air conditioner using a phase change material, characterized in that a gas volume is formed in a predetermined volume or more therein. The method according to claim 1 or 4, A heat exchanger of a cold storage type cooling device using a phase change material, characterized in that a dispersing fan is installed at a lower end of the main body case and a motor for rotating the same is provided. The method according to claim 1 or 4, A heat exchanger of a cold storage type air conditioner using a phase change material, characterized in that a stirrer which is a spiral bar-shaped body is installed at a lower end of the main body case, and a motor for rotating the stirrer is provided. The method according to claim 1 or 4, The upper bulkhead extending downward from the upper end and the lower bulkhead extending upward from the lower end are formed in the main body case, and the upper and lower bulkheads are formed to extend only to a predetermined length so as to be predetermined to each top or bottom. A heat exchanger of a cold storage type air conditioner using a phase change material, characterized in that to form a space.