KR101439199B1 - Heat exchange device of heater with freezing protection means - Google Patents

Abstract

The present invention relates to a heat exchange device of a heater which rapidly transfers a heat source of a heating medium passing through a lower head of a heat exchanger to a heat plate heated by a working fluid for an effective heat exchange, and uses a heating medium having an extremely low freezing point as the working fluid to prevent freezing of the heat plate even during a winter season. The heat exchange device includes a head formed having an upper storage chamber and a lower storage chamber, wherein a working fluid with an extremely low freezing point is charged inside the upper storage chamber, a heating medium is moved to the lower storage chamber to transfer a heat source to the working fluid charged inside the upper storage chamber, and heat plates are installed at equidistant intervals in the upper storage chamber to rapidly receive heat from the working fluid and be heated, thereby enabling heat exchange with air passing between the heat plates.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat exchanger for a radiator provided with a freezing prevention device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for a heater such as an air conditioner or a hot air fan, and more particularly, to a heat exchanger for heating a hot water such as steam or hot water passing through a lower head of a heat exchanger, The plate can be quickly transferred to the heat exchanger, and efficient heat exchange can be achieved, and the generation of freezing of the heat plate can be prevented by the working fluid having a low freezing point.

Generally, various buildings are provided with an air conditioner for maintaining a pleasant indoor environment, and the air conditioner is provided with a cooling system for lowering the temperature in the summer and a heating system for raising the temperature in the winter season.

Therefore, during the winter when the outside air temperature falls below freezing, the cooling coil as the heat exchanger and the water as the heat exchanging medium flowing inside the heating coil are frozen, and the volume expands. This volume expansion acts as pressure, And the heating coil must be partially damaged or repaired, or the whole must be replaced, resulting in a time and economic loss due to maintenance and replacement.

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 the upper and lower heads, respectively, 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 above apparatus, there is a fear of malfunction due to a complicated sensing means and apparatus such as a vacuum removing valve, a temperature sensor, a solenoid valve, etc. If residual water is not completely discharged and remains in the coil, .

As a means for improving the heat exchange efficiency of the heat exchanger separately from the means for preventing the freezing of the heat exchanger, Patent No. 10-1299572 entitled " Energy Saving Apparatus for Condensation and Condensate Water Using Condensation Water " ) Have been provided.

The plate heat pipes filled with the working fluid are disposed at equal intervals on the upper end of the water collecting tank and the lower end of the plate heat pipe is positioned in the water collecting tank and the water is supplied through the condensation water supply pipe and the condensate water supply pipe And the plate heat pipe is cooled or heated by the condensed water and the condensed water flowing therethrough so that the outside air passing therethrough can be cooled or heated while being heat-exchanged.

In the case of Patent Document 5, the working fluid is filled in the plate heat pipe and then sealed. The lower end of the plate heat pipe is located in the collecting tank through which the condensed water and the condensed water pass, and the heat source of the condensed water and the condensed water is rapidly transferred to the plate heat pipe, So that effective heat exchange can be achieved.

However, considering the heat exchange structure of Patent Document 5, since the lower end portions of the plate heat pipes are located up to the bottom of the collecting tank, not only the flow of the heat is impeded but also flows through the both ends of the collecting tank, In the case of the plate heat pipe located at the other central portion excluding the heat pipe, the contact with the condensed water and the condensed water can not be sufficiently performed, and the heat exchange efficiency is lowered.

In addition, in the case of the plate heat pipe, since the inner space portion filled with the working fluid is narrow and elongated rectangular, it is difficult to apply to the structure in which the working fluid is lifted and lowered while being vaporized and cooled.

Korean Utility Model Registration No. 20-225769 entitled "Heat exchanger with freeze protection device" Korean Utility Model Registration No. 20-227935 entitled "Device for preventing freezing of radiator for air conditioner" Korean Utility Model Registration No. 20-300908 "Device for preventing freezing of heat exchanger for air conditioning" Korean Patent No. 10-784771 "Device and system for preventing freezing of air conditioner with vertical heat exchanger" Patent No. 10-1299572 entitled "Energy Saving Device of Air Conditioner Using Condensation and Condensation Water"

In order to solve the above-described conventional drawbacks, the present invention provides a heat exchanger of a radiator, in which a heat source of heat flux passing through a lower head of a heat exchanger is quickly transmitted to a heat plate, And the working fluid that generates heat of the heat plate can prevent the freezing of the heat plate even during the winter season by using the fruit having a very low freezing point.

In order to solve the above-mentioned problems, the present invention provides a head comprising a heat exchange apparatus divided into an upper storage room and a lower storage room, wherein the upper storage room is filled with a working fluid having a very low freezing point, The heat source is transmitted to the working fluid filled in the upper compartment and the heat plate is installed at the equal interval in the upper compartment to rapidly receive the heat of the working fluid to generate the heat so that heat exchange with the air passing between the heat plates .

In the heat exchanger of a radiator, a head constituting a heat exchanger is divided into an upper water chamber and a lower water chamber. The upper water chamber is filled with a working fluid having a very low freezing point, The heat source is transferred to the working fluid in the upper receiving chamber so that the heat plate installed in the upper receiving chamber is heated and the heated heat plate can be heat exchanged with the air passing therethrough, Not only effective heat exchange can be achieved, but also it is possible to prevent the heat plate from being frozen during the winter season.

1 is a perspective view of a heat exchanger of the present invention;
2: Front view of the heat exchanger of the present invention
3: side view of the heat exchanger of the present invention
4 is a side cross-sectional view of the heat exchanger of the present invention.
5: Fig. 4
6 is a plan sectional view of the heat exchanger of the present invention
7: sectional view of the heat plate used in the present invention
Figure 8: Partial maritime attempt of the present invention

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

FIG. 1 is a perspective view of a heat exchange apparatus 10 to be provided in the present invention, and FIGS. 2 to 8 show the construction of a heat exchange apparatus in more detail. A head 20 in which a lower water receiving chamber 40 through which the heated fruit passes is formed as a separate head and a heat plate 60 provided upright at equal intervals in the upper water receiving chamber 30, do.

The head 20 is divided into an upper compartment 30 and a lower compartment 40 through which the upper center portion is recessed through the upper partition 22 formed at the upper end of the main body 21, Is intercepted from the outside through the lower partition plate (23).

4 and 5, the upper diaphragm 22 is formed on the end portion of the bent piece 24 formed on both sides of the upper end of the main body 21, The upper and lower support walls 30 and 40 are configured to have a larger contact area through the upper partition 22 by forming the lower pressurizing chamber expanding portion 41 on both sides of the upper partition 40.

In addition, heat dissipating pieces 25 are formed at equal intervals on the outer surface of the upper partition plate 22 contacting the lower compartment 40, so that heat transfer can be effectively performed.

The lower side plates 26 and 26 'are welded to both ends of the head 20 having the above-described structure to completely close the lower compartment 40 and the upper compartment 30 to block both sides.

One side plate 26 of the side plates 26 and 26 'welded on both sides of the head 20 is provided with an injection port 28 for filling a working fluid C in the upper hydration chamber 30, And an outlet pipe 29 is formed in the other side plate 26 '.

The lower fixing plate 50 is positioned in the upper water retention chamber 30 formed on the main body 21 of the head 20 and then welded to the main body 21 to block the upper water retention chamber 30 from the outside, (50) are formed by drilling a rectangular lower coupling hole (51) at regular intervals.

The center side plate 80 is welded directly above the lower side plates 26 and 26 'and the upper side plates 76 and 76' are welded to the upper end of the center side plate 80. The upper side plate 76 A space portion 73 is formed between the cover 72 and the upper fixing plate 70 so that the upper fixing plate 70 and the cover 72 are welded to each other, .

The heat plate 60 is inserted into the upper and lower engaging holes 51 and 71 at equal intervals in the upper and lower fixing plates 50 and 70 so that the lower end of the heat plate 60 is positioned in the upper compartment 30, The lower end of the heat plate 60 fitted to the coupling hole 51 is welded and the upper end is positioned in the space portion 73 so as to be able to flow in the vertical direction while being fitted in the upper coupling hole 71. [

6 and 7, the heat plate 60 has a hollow portion 61 on the inner surface thereof, and the upper end portion of the heat plate 60 is sealed off. The lower end portion of the heat plate 60, which is located in the upper holding chamber 30, On both sides of the hollow portion 61, a narrow groove is formed and a large groove 62 is formed.

When the heat plate 60 is installed in the upper water receiving chamber 30 of the head 20 as described above, the working fluid C is filled in the sealed state through the inlet 28, And a pipe is connected to the inflow pipe (27) and the outflow pipe (29) through the inflow pipe (27) to supply and pass the heated fruit (S) such as steam or hot water.

At this time, it is preferable to fill acetone-type working fluid having a very low freezing point and excellent heat transfer efficiency, and the acetone-type working fluid C has a freezing point of -95 ° C and a boiling point of 56 ° C, it is possible to prevent freezing in winter.

The heat exchanger 10 of the present invention constructed as described above is used when heat exchange is required in a heating device of a heater such as an air conditioner or a hot air fan, and a heat exchange process of the heat exchanger 20 will be described as follows.

When the heated fruit S such as steam or hot water flows into the lower compartment 40 through the inflow pipe 27 formed at one side of the head 20 of the heat exchanger 10, The upper partition plate 22 partitioning the upper hydraulic chamber 30 and the lower hydraulic chamber 40 is heated and the acetone-based working fluid C filled in the upper hydraulic chamber 30 by the heated upper partition plate 22 And the heat transfer is more efficiently performed by the heat radiating pieces 25 protruding at equal intervals on the outer surface of the upper partition plate 22. [

At this time, the acetone-based working fluid (C) has a rapid heat transfer, especially at a boiling point of 56 ° C, so that the boiling point is easily reached.

When the working fluid C boils, the vaporized state is vaporized. The vaporized vapor is raised by the buoyancy through the hollow portion 61 formed on the inner surface of the heat plate 60 and then cooled and liquefied, The heat plate 60 is heated while repeating the operation of dropping into the upper holding chamber 30 by gravity through the portion of the concave groove 62 and again vaporizing by the heat source of the heat source S to rise, .

As described above, when the heat plate 60 is heated by the working fluid C, the air passing between the heat plates 60 is heat-exchanged and heated, and the heated air provides heating.

The upper diaphragm 22 for partitioning the upper and lower water holding chambers 30 and 40 is formed in a concave shape in the upper bent piece 24 of the main body 21 of the head 20, The heat dissipating piece 25 is formed while providing the extension portion 41 to maximize the contact area with the heat transfer material S passing through the lower compartment 40 and effective heat transfer is achieved.

The upper end of the heat plate 60 is located in the space 73 of the cover 72 while being fitted in the upper engagement hole 71 of the upper fixing plate 70. The upper end of the heat plate 60 And absorbs elasticity.

The heated fruit S flowing into the lower compartment 40 through the inlet pipe 27 and heating the working fluid C exits the lower compartment 40 through the outlet pipe 29, The process of heating the fruit S again and flowing into the lower holding chamber 40 is repeated.

Particularly, the working fluid (C) filled in the upper water receiving chamber (30) uses acetone-based solvent having a freezing point of -95 ° C so that the heat plate (60) can be prevented from being frozen even if the heating of the winter season is stopped .

(10) -heat exchanger (20) -head
(21) - body (22) - upper diaphragm
(23) -lower diaphragm (24) -bending piece
(25) -heat dissipating piece (26) -the lower side plate
(27) - inlet pipe (28) - inlet
(29) - Outflow tube (30) - Upper receiving chamber
(40) -lower compartment (41) -lower compartment
(50) -Bottom fixing plate (51) -Bottom engaging hole
(60) - Heat plate (61) - Hollow part
(62) - concave groove (70) - upper fixing plate
(71) - upper coupling hole (72) - cover
(73) -space portion (76) - upper side plate
(80) - central shroud

Claims (5)

A bottom plate having an inlet pipe and an outlet pipe is welded to both sides of the head where the water receiving chamber is formed, a lower fixing plate having a lower coupling hole is welded on the head, and a heat plate having a hollow portion is fitted on the lower fixing plate The upper plate is coupled to the upper end of the heat plate, and the heat plate is heated by heat transferred through the inlet tube and the outlet tube to the heat exchange chamber of the head to perform heat exchange. The upper diaphragm 22 is formed on the main body 21 of the head 20 so that the upper hydration chamber 30 and the lower hydration chamber 40 are separated from each other in the head 20, The fluid C is filled to heat the heat plate 60 and the working fluid C filled in the upper holding chamber 30 is heated by passing the heated fruit S through the lower holding chamber 40 Characterized by The heat exchanger is provided with the means for preventing freezing. The device according to claim 1, characterized in that the heat dissipating piece (25) is formed at the lower end of the upper diaphragm (22) so that the heat source of the heat fruit (S) can be effectively transferred to the working fluid (C) A heat exchanger of a radiator. The bending piece according to claim 1, wherein the bending piece is formed at the upper end of the main body of the head and the upper partition plate is recessed at the end of the bending piece, It is possible to increase the heat transfer efficiency by widening the contact area between the upper partition plate 22 and the heating fruit S and by forming the inlet 28 in the lower side plate 26, Characterized in that the working fluid (C) is filled or replenished in the water retention chamber (30). The heat exchanger heat exchanger according to claim 1, wherein the working fluid (C) filled in the upper hydration chamber (30) of the head (20) is an acetone type working fluid. The heat exchanger according to claim 1, wherein an upper end portion of the hollow portion (61) formed on the inner surface of the heat plate (60) is closed and a lower end portion is opened, and both sides of the hollow portion (61) , The exothermic vaporized working fluid C is vertically raised through the hollow portion 61 and then cooled so that the cooled working fluid C is returned to the upper hydration chamber 30 through the recessed groove 62 Characterized in that the heat exchanger is provided with a means for preventing freezing.

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