KR101860072B1 - System for heat exchange - Google Patents

Abstract

The present invention relates to a heat exchanging system of a dual heat exchange type for periodically changing an air inlet and an air outlet to enhance heat exchange efficiency through a direct contact with air and to prevent freezing of a discharge part in winter. The heat exchanging system comprises an air supply part, an air discharge part, a damper for control an air flow direction to be changed periodically, first and second air supply and discharge parts for periodically changing air supply and air discharge and first and second heat exchanging parts. After the first and second air supply and discharge parts for periodically changing air supply and air discharge directly exchange heat with the first and second heat exchanging parts while supplying and discharging the air, the damper is operated to control a flow of the air such that the air discharge part, which has discharged air, and the air supply part, which has supplied air, change the air supplying and discharging actions with each other to perform heat exchange. Therefore, the heat exchanging system is capable of reducing costs for installing a freezing prevention facility because it can prevent freezing even if a freezing prevention facility for preventing freezing in winter is not installed, and also reducing maintenance costs.

Description

A dual heat exchange type heat exchange system that periodically exchanges air,

The present invention relates to a dual heat exchange type heat exchange system for periodically changing the air supply and exhaust airflow, which can prevent the freezing of the exhaust part in winter, while improving the heat exchange efficiency through direct contact of air.

Generally, in the residential space of a residence, or in a work space of a building such as an office or an office, the cooling of the summer and the heating of the winter are the main factors of energy consumption.

In recent years, the demand for energy for cooling and heating has been rapidly increasing due to the proliferation of residential space due to population growth and the increase of factory sites and offices due to industrial development.

Such a rapid demand for energy is driving up the price of fossil fuels such as oil and natural gas.

In the fields of agriculture, livestock industry and fishery industry, managers of facility farms and aquaculture companies are under the pressure of management due to rising cost of heating and cooling due to the increase of fossil fuel prices. In the field of manufacturing, The rise in production costs of products has caused many difficulties.

In addition, this energy overproduction phenomenon is a major factor of global warming due to environmental pollution caused by soot generated in the combustion process of fossil fuel.

Recently, the heat generated and recovered in the circulation process of the compression, evaporation, and condensation of the refrigerant is used to obtain the energy equivalent to the cooling and heating effect by combustion of the fossil fuel without causing pollution. , And the use of air conditioners that perform heating is becoming common.

On the other hand, in the above-mentioned air conditioner, the cooling coil, which is a heat exchanger, and water as a heat exchanging medium that flows inside the heating coil are frozen in the winter season when the outside air temperature drops below zero, and the volume expands, Therefore, there is a problem that the cooling coil and the heating coil of the heat exchanger are damaged to partially repair or replace the whole, thereby causing time and economic loss due to maintenance and exchange.

As means for solving this problem, means are provided for cooling the heat exchanger and for preventing the freezing of the heating coils.

(Patent Document 1) and Korean Utility Model Registration No. 20-227935 entitled "Device for preventing freezing of a radiator for an air conditioner" (Patent Document 2 ) And Korean Utility Model Registration No. 20-300908 entitled " Device for preventing freezing of heat exchanger for air conditioner "(patent document 3).

In consideration of the technical contents of Patent Document 1, a coil tube inlet and an outlet of a heat exchanger are connected to each other by an auxiliary pipe, and a temperature sensor, an electric heater, a circulation pump, a check valve and a control unit are provided in the auxiliary pipe. When the auxiliary pipe falls to below zero, the temperature sensor senses this and the electric heater and the circulation pump are operated and the check valve is opened. Therefore, the fluid inside the coil tube of the heat exchanger is heated and circulated to prevent the frost wave.

When a description of the technical contents of Patent Document 2 is examined, it is a structure in which a heater that operates by receiving a signal from a temperature sensor in the vicinity of the front of the heat exchanger is installed. When the outside air temperature falls below zero, the heater operates and the coil tube of the heat exchanger is frozen .

Also in the case of Patent Document 3, when a temperature sensor is provided on a coil tube constituted in a heat exchanger and the outside air temperature falls below zero, the heater is operated by the detection of the temperature sensor to dissipate heat to prevent the coil tube of the heat exchanger from being frozen .

When the outside temperature of the engine is lowered to minus zero, the temperature sensor senses the temperature of the outside of the engine and causes the heater to operate and generate heat to prevent the coil tube of the heat exchanger from being frozen. However, Considering that it is almost zero, the operation time of the heater is increased, and the consumption of electrical energy is rapidly increased, resulting in an increase in the economic burden.

As a means for solving such a problem, Japanese Patent No. 10-784771 entitled " Device and system for preventing freezing of an air conditioner having a vertical heat exchanger "(Patent Document 4) is provided.

When examining the technical content of the Patent Document 4, a plurality of coils are vertically arranged at regular intervals and connected to each of the upper and lower heads, and then the frame is assembled to constitute a cooling coil and a heating coil. And a solenoid valve controlled by a control unit to which a temperature sensor is connected.

Accordingly, when the air conditioner is stopped, moisture remaining in the vertically formed coil is firstly discharged. If moisture remains, if the vacuum removing side is opened, the moisture remaining in the coil is discharged to the outside by the air pressure, In addition, when the temperature sensor detects the water temperature remaining in the coil and the temperature is less than 1 ° C, the solenoid valve is fully opened to completely discharge moisture in the coil.

However, in the case of the apparatus of Patent Document 4, there is a fear of malfunction due to a complicated sensing means and apparatus such as a vacuum removing valve, a temperature sensor, and a solenoid valve. When the residual moisture is not completely discharged and remains in the coil It was also a concern of the frog.

Furthermore, since there is a need for additional means for preventing freezing, there is a problem that production cost and maintenance cost are separately generated.

According to an aspect of the present invention, there is provided a dual heat exchange type heat exchange system for periodically exchanging air supply and exhaust air according to the present invention, wherein air including cold heat and heat is directly brought into contact with a heat exchanger to perform heat exchange, There is provided a dual heat exchange type heat exchange system for periodically changing an exhaust port.

It is still another object of the present invention to provide an air supply unit and an air supply unit which periodically perform exhaust or air supply operations alternately through an air flow direction control, thereby preventing winter frost in winter.

The present invention is characterized in that the first and second exhaust and air supply units are provided with an exhaust unit that has been exhausted after direct heat exchange with the first and second heat exchange units while supplying and exhausting air, The damper operates so as to perform the heat exchange so that the flow of the air is controlled so that the air and the heat exchanging unit are in direct contact with each other and the heat efficiency is improved.

Particularly, by controlling the air flow of the damper, the first and second exhaust and supply units alternately perform the exhaust and air supply operations alternately to prevent the freezing of the frost prevention facility It is a useful invention that can reduce the cost of installation and the cost of maintenance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a dual heat exchange type heat exchange system for periodically changing the air supply and exhaust ports of the present invention. FIG.
FIG. 2 is a perspective view showing a damper of a dual heat exchange type heat exchange system that periodically changes the air supply and exhaust ports of the present invention. FIG.
FIG. 3 (a) is a state diagram showing a first operation state of the damper, and FIG. 3 (b) is a state diagram showing a second operation state of the damper.

Hereinafter, the configuration of the present invention will be described in more detail with reference to the accompanying drawings.

1, the air supply unit 110 is installed in a room to receive external air.

The air supply unit 110 includes an air supply diffuser 111 installed in the room and an air supply fan 112 connected to the air supply diffuser 111 by an air supply line 113.

In addition, the air supply fan 112 may include a filter F, and the filter F may be a pre-filter or a medium filter.

Next, the air discharge unit 120 is installed in the room, and is configured to discharge the polluted air therein.

The air outlet 120 is formed of an air discharge diffuser 121 installed in a room and an exhaust fan 122 connected to the air discharge diffuser 121 by an exhaust line 123.

Next, the damper 130 is formed between the air supply unit 110 and the air outlet 120 to control the flow direction of the air.

2, the damper 131 and the damper 132 for the second air supply are connected to the air supply unit 110 to selectively open and close the damper 131, The first air discharge damper 133 and the second air discharge damper 134 are connected to the air discharge unit 120 and selectively opened and closed.

Next, the exhaust and supply unit 140 of the first air is installed outdoors and is coupled to the damper 130 to discharge the air from the room to the outside by the operation of the damper 130 And the air supply unit is configured to perform an air supply function that serves to supply outside air to the room by sucking the outside air.

Next, the exhaust and supply unit 150 of the second air is installed outdoors. The damper 130 is coupled to the damper 130 to discharge the air from the room to the outside by the operation of the damper 130 And the air supply unit that serves to supply outside air to the room by sucking the outside air.

Here, the first and second air exhaust and supply units 140 and 150 are configured to perform different roles when the flow direction of the air is controlled by the damper 130.

That is, when the air supply unit 110 is connected to the exhaust and supply unit 140 of the first air by the damper 130 and the exhaust and supply unit 140 of the first air functions as an air supply unit, The exhaust unit 120 and the exhaust and the exhaust unit 150 of the second air are connected to each other so that the exhaust and the exhaust unit 150 of the second air serve as an exhaust unit.

Next, the first heat exchanging unit 160 is formed between the damper 130 and the exhausting and supplying unit 140 of the first air, and when the air to be fed and discharged moves, the heat energy including the cold heat and the heat included in the air In direct contact with the air.

Next, the second heat exchanging unit 170 is formed between the damper 130 and the exhausting and supplying unit 150 of the second air, so that when the air to be supplied and discharged moves, the heat energy In direct contact with the air.

2 and 3 (a), the first air supply damper 131 and the first air discharge damper 133 of the damper 130 are opened and the second air supply damper 133 is opened When the damper 132 and the second air discharge damper 134 are closed, the exhaust air of the first air and the air supply unit 140 serve as an air supply unit to suck outside air. The heat exchanger 160, the first air supply damper 131 of the damper 130, and the air supply unit 110 are moved.

The first air discharge damper 133 and the second heat exchange portion 170 of the damper 130 and the second air discharge and supply unit 150 are formed so that a flow of air is formed in the air discharge unit 120, .

That is, the exhaust and supply unit 150 of the second air serves as an exhaust unit.

At this time, the first heat exchanging unit 160 performs heat exchange with the outside air flowing into the inside, and the second heat exchanging unit 170 performs heat exchange with the inside air discharged to the outside.

On the other hand, if the damper 130 is controlled by a normal control section (not shown in the figure) after 60 seconds, the first air supply damper 131 and the first air discharge damper When the second air supply damper 132 and the second air discharge damper 134 are opened, the exhaust and supply unit 140 of the first air serving as an air supply unit acts as an exhaust unit And the exhaust and supply unit 150 of the second air that has performed the role of the exhaust unit controls the air flow to perform the role of the supply unit.

Accordingly, the first heat exchanging unit 160, which is in direct contact with the outside air to supply heat to the outside air, exchanges heat with the internal air in the process of discharging the inside air, and the heat exchanging unit 170), on the contrary, directly contact with the outside air to perform heat exchange.

That is, the present invention periodically controls the opening and closing of the first and second air supply dampers 131 and 132 and the first and second air discharge dampers 133 and 134 of the damper 130, So that the first and second air exhaust and supply units 140 and 150 installed outside can periodically serve as an exhaust unit and an air supply unit, Since the heat exchange is performed by directly contacting the first and second air blowing units 160 and 170 to improve heat exchange efficiency, air including heat is periodically moved to the first and second air exhausting and feeding units 140 and 150 even when the outside air is low It is possible to prevent freezing in the winter even if there is no separate freezing prevention facility.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Of course.

F: Filter
110:
111: air supply diffuser 112: air supply fan
113: Supply line
120:
121: air discharge diffuser 122: exhaust fan
123: Exhaust line
130: damper
131: first air supply damper 132: second air supply damper
133: first air discharge damper 134: second air discharge damper
140: exhaust and supply part of the first air
150: exhaust and supply part of the second air
160: first heat exchanger
170: second heat exchanger
100: Dual heat exchange type heat exchanger system that periodically changes the air supply and exhaust

Claims (2)

An air supply unit 110 composed of an air supply diffuser 111, an air supply fan 112 and an air supply line 113 for supplying air to the room;
An air discharge unit 120 composed of an air discharge diffuser 121, an exhaust fan 122 and an exhaust line 123 for discharging indoor air to the outside;
First and second air supply dampers 131 and 132 selectively connected to the air supply unit 110 to control an air flow direction of the air supply unit 110 and the air discharge unit 120, A damper 130 composed of first and second air discharge dampers 133 and 134 selectively connected to the first and second air blowing units 120 and 120;
A first air exhaust and supply unit 140 connected to the air supply unit 110 or the air discharge unit 120 by the damper 130 to supply outside air or discharge internal air;
A second air exhaust and supply unit 150 connected to the air supply unit 110 or the air discharge unit 120 by the damper 130 to supply outside air or discharge the inside air;
A first heat exchange unit 160 formed between the damper 130 and the exhaust and supply unit 140 of the first air and connected to the air supply unit 110 or the air discharge unit 120 by the damper 130, ;
A second heat exchange unit 170 formed between the damper 130 and the exhaust and air supply unit 150 of the second air and connected to the air supply unit 110 or the air discharge unit 120 by the damper 130, ; And,
When the first air supply damper 131 and the first air discharge damper 133 of the damper 130 are opened and the second air supply damper 132 and the second air discharge damper 134 are closed The air supplied from the air supply unit 112 of the air supply unit 110 is supplied to the first air supply and exhaust unit 140, the first heat exchange unit 160, and the first air supply damper 131 and the air supply unit 110 so that the exhaust and supply unit 140 of the first air serves as an air supply unit and the air in the room is discharged through the air discharge unit 120, The second air heat exchanger 170 and the second air exhaust and air supply unit 150 of the second air supply and exhaust unit 150 To perform the role of the exhaust part,
The first air supply damper 131 and the first air discharge damper 133 are closed and the second air supply damper 132 and the second air discharge damper 133 are closed after a certain period of time with the above- When the damper 134 is opened, the exhaust and supply part 140 of the first air, which served as a supply part, functions as an exhaust part, and the exhaust and supply part 150 of the second air, Airflow is controlled to perform the role of donation,
The first and second air supply dampers 131 and 132 and the first and second air discharge dampers 133 and 134 of the damper 130 are periodically controlled to constantly control the air flow direction, The first and second air exhaust and supply units 140 and 150 periodically function as an exhaust unit and an air supply unit so that the air to be supplied and discharged is supplied to the first and second heat exchangers 160 and 170 ), The heat exchange efficiency is improved, and even when the outside air is low, the air including the heat is periodically transferred to the exhaust and supply units 140 and 150 of the first and second air, A dual heat exchange type heat exchanging system that periodically changes the air supply and exhaust ports, which is characterized by being constructed so as to prevent freezing in winter even if it is not provided. delete

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