KR101877310B1 - Cold Air and Warm Air Generating Apparatus - Google Patents

Abstract

An object of the present invention is to provide a cold air generating device and a hot air generating device capable of reducing electricity costs while using a refrigeration cycle and an electric heater with excellent cooling effect.
To this end, the present invention includes a case 10 for cooling or heating water, and a cold and hot air generating unit 20 for selectively generating cold or hot air while circulating water cooled or heated in the case 10 The refrigerator includes a refrigerating cycle including an evaporator (13), a compressor (14), a condenser (15), and an expansion valve (16) Wherein the case 10 is a heat insulating case made up of an outer cylinder 10a and a first inner cylinder 10b and a space between the outer cylinder 10a and the first inner cylinder 10b, A heater 17 is provided under the first inner cylinder 10b and an evaporator 13 is provided at an upper portion of the first inner cylinder 10b and the cold air and the hot air generated by the hot air generator 20 Is connected to the water supply pipe 21 and the water discharge pipe 22 and is provided therein with a blowing fan 25, And a pump 23 for supplying cold water or hot water to the cold / hot air generating unit 20 is installed in the water supply pipe 21.

Description

Technical Field [0001] The present invention relates to a cold air generating apparatus and a warm air generating apparatus,

More particularly, the present invention relates to an apparatus for generating cold air and hot air, and more particularly, to a system for generating cold air by generating cold air in a process of cooling water using a refrigeration cycle principle and exchanging cold water with air, The present invention relates to a cold air generating device and a hot air generating device capable of significantly saving electric power compared to a conventional air conditioner and an electric heater type air heater by generating warm air in a process of heating and exchanging warmed water with air.

Cool air generating device that emits cool air, and there is air conditioner. The air conditioner has a drawback in that it has a cooling effect but consumes a lot of electricity.

The air conditioner uses the principle of a refrigeration cycle. The evaporator includes a compressor, a condenser, a condenser, and an expansion valve.

The above-mentioned air conditioner lowers the temperature inside a certain space while compressing, condensing-expanding-evaporating refrigerant such as HFC and CO ₂ .

In the vapor compression refrigeration cycle, the liquid refrigerant passes through the expansion valve and the temperature and pressure drop. This is to make the refrigerant into a low-temperature and low-pressure state so that the refrigerant evaporates easily in the evaporator.

The liquid refrigerant flowing into the evaporator absorbs the latent heat from the outside and evaporates while changing the phase to superheated steam.

In this process, the ambient temperature is lowered. At this time, by blowing the air around the evaporator which is lowered in temperature by operating the blower fan, the temperature inside the certain space can be lowered.

The refrigerant changed from the evaporator to the superheated steam is compressed into a high-temperature and high-pressure gas state which is easily liquefied by the compressor.

The refrigerant gas in the high-temperature and high-pressure state passes through the condenser and undergoes a phase change again to liquid refrigerant.

That is, the high-temperature and high-pressure refrigerant gas compressed in the compressor is cooled while being transferred from the condenser to the outside, and is changed into a liquid state.

The refrigerant that has been liquefied while passing through the condenser is lowered in temperature and pressure while passing through an expansion valve, an orifice, or the like.

The low-temperature and low-pressure refrigerant that has passed through the expansion valve is sent to the evaporator again to form a refrigeration cycle while circulating.

That is, the condenser raises the ambient temperature while transferring heat to the outside, and the evaporator functions to lower the ambient temperature while transferring heat to the outside.

The air conditioner mainly uses the vapor compression refrigeration cycle described above. However, the air conditioner using the refrigeration cycle has a problem that the cooling effect is excellent but the consumption of electricity is very large.

On the other hand, as the hot air generating device for generating hot air, there are electric heater type hot air fan, hot air fan using oil or gas, and hot air fan using wood pellet.

Among them, the electric heater-type air heater blows hot air by the blowing fan after heating the heater on the coil.

The above-mentioned electric heater type air heater is advantageous in that it is small in size, relatively simple in structure, and can be installed on a wall.

However, since the conventional electric heater type air warmer reduces the amount of oxygen in the air, the user feels discomfort when the heater is used for a long time.

Accordingly, when the electric heater-type air conditioner is used in a small room, it is troublesome to ventilate frequently.

In addition, a conventional electric heater type fan heater is pointed out to have a problem that electric consumption is large.

On the other hand, there is a hot / cold air generating device capable of generating both cold air and hot air, and the conventional hot / cold air generating device also has a disadvantage of high electric consumption.

Accordingly, there is a problem in that it is not suitable for cooling or heating a large area such as an industrial site.

As a result of retrieving the prior art related to the present invention, a large number of patent documents have been searched, and some of them will be described as follows.

Patent Document 1 includes at least one thermoelectric element for supplying cool air or warm air by a thermoelectric effect by a power source, and a refrigerant (on-air) which is disposed in front of the thermoelectric element and can store cool air or warm air supplied from the thermoelectric element A rear axis cold / hot bath; A fan disposed on a front surface of the rear shaft cold / hot bath and rotated by a rotation axis of the driving motor; And a heat pipe having one end connected to the rear shaft cold / hot bath and the other end extending to the front surface of the fan, and a cold / hot air generating device using the thermoelectric device.

Patent Document 2 is mainly aimed at increasing the pleasure degree by minimizing the inconvenience of the user by imparting turbulence amplification of the turbulent discharge wind to make the wind irregular and smooth, , Variable device or electronic control device to control various blowing motors respectively, so that various types of winds can be selectively made to suit user's temperature preference easily, and even if used for a long time, A case in which a discharge port is formed on one side so as to generate a natural convection current to generate a natural convection so that the skin does not get tinged or poured, an air blower which is installed in the case so as to be far from the discharge port and generates wind, A heat exchanger installed inside the case and performing heat exchange, A pressure wave removing means installed inside the case between the heat exchanger and the discharge port and outside the case adjacent to the outlet and irregularly blowing out the pressure wave of the wind discharged from the blower and passed through the heat exchanger; And a suction duct for guiding the flow of air by connecting the suction port and the inside of the case to each other.

Patent Document 3 relates to a cold / hot air fan equipped with an inflow air oxygen generator capable of inflowing and purifying contaminated air in a room and then exchanging purified air to discharge the hot air or cold air to the outside through a discharge port, An air compression pump installed inside the air / cooling fan and the air suction grille for sucking and discharging the outside air, and a compressor for supplying compressed air discharged from the air compression pump through the hose to the zeolite charging bed, A three-way control valve which is supplied with nitrogen gas separated from the zeolite filling bed and has a synchromotor formed at an upper portion thereof so as to discharge the nitrogen gas to the outside, and a three-way control valve which receives nitrogen from the three- A zeolite filling bed for separating oxygen from the zeolite; An oxygen collecting bed for collecting oxygen, and a regulator for discharging pure oxygen discharged from the oxygen collecting bed to a predetermined pressure.

KR 10-1396529 B1 KR 10-2004-0040995 A KR 20-0291012 Y1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cold air generating device and a hot air generating device capable of reducing electricity costs while using an electric heater having a superior cooling effect and a refrigeration cycle with excellent cooling effect .

Another object of the present invention is to provide a cold wind and a hot wind generating device that can be usefully used when local cooling or heating is required in various industrial fields.

In order to accomplish the above object, the present invention provides a cold air conditioner comprising a case for cooling or heating water, and a cold air and a hot air generating unit for selectively generating cold air or hot air while circulating water cooled or heated in the case, A generating device comprising: a heater which is provided with a refrigerating cycle including an evaporator, a compressor, a condenser, and an expansion valve, and which is heated by electricity, and the case has a heat insulating case Wherein a space between the outer cylinder and the first inner cylinder is filled with a foaming material, a heater is provided in a lower portion of the first inner cylinder, an evaporator is provided in an upper portion of the first inner cylinder, And is connected to a pipe and a water discharge pipe, and a blowing fan is provided in the pipe. In the water supply pipe, And a pump for supplying the generated gas to the generator is provided.

And a temperature sensor is provided below and above the first inner cylinder, respectively.

Further, the foam member is formed of polyurethane.

Further, the case is characterized in that a vacuum portion is formed in a space between the outer cylinder and the first inner cylinder.

Further, the case may further include a second inner cylinder on the inner side of the first inner cylinder, a foam material is filled between the outer cylinder and the first inner cylinder, and a vacuum portion is formed in the space between the first inner cylinder and the second inner cylinder .

Further, the inside of the case is divided into a lower case and an upper case by barrier ribs provided horizontally, and a plurality of through holes are formed in the barrier ribs.

Further, an evaporator is provided on the upper part of the lower case, and a heater is provided on the lower part of the upper case.

A water supply pipe is connected to the lower case, and a water discharge pipe is connected to the upper case.

And a heat insulating material is further provided on the outer circumference of the water supply pipe and the water discharge pipe.

According to the present invention, when cold air is generated, there is an effect that the refrigeration cycle is not operated until the water is raised to a predetermined temperature after cooling the water to a predetermined temperature.

In addition, when hot air is generated, there is an effect that the water is not heated until the water falls to a predetermined temperature after the water is heated to a predetermined temperature by the electric heater.

As a result, it is possible to drastically reduce the electricity cost.

In addition, since hot air is generated in the course of heating the water by the heater without exchanging hot air while heating the heater, the amount of oxygen in the air is not reduced.

Accordingly, even when the apparatus is operated for a long period of time, there is an effect that the user does not feel uncomfortable feeling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram of a cold air and a hot air generator according to a first embodiment of the present invention; FIG.
2 is a sectional view of a case according to a second embodiment of the present invention;
3 is a cross-sectional view of a case according to a third embodiment of the present invention;
4 is a schematic configuration diagram of a cold air and a hot air generating device according to a fourth embodiment of the present invention;
5 is a sectional view of a case according to a fifth embodiment of the present invention;
6 is a sectional view of a case according to a sixth embodiment of the present invention;

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

≪ Embodiment 1 >

1 shows a first embodiment of the present invention.

As shown in FIG. 1, the cold air and hot air generating apparatus according to the first embodiment of the present invention includes a case 10 for cooling or heating water, A compressor (14), a condenser (15), an expansion valve (16), and an indoor heat exchanger (20) And a heater 17 which is heated by electricity.

The case 10 is a heat insulating case made up of an outer cylinder 10a and a first inner cylinder 10b. The space between the outer cylinder 10a and the first inner cylinder 10b is filled with the foaming material 11.

The case 10 is preferably formed in a cylindrical or rectangular tube shape, but is not limited thereto.

The foam material 11 provided in the space between the outer cylinder 10a and the first inner cylinder 10b may be formed of polyurethane.

However, the present invention is not limited thereto, and any heat insulating material may be used as long as it has a heat insulating property.

A heater 17 is provided below the first inner cylinder 10b and an evaporator 13 is provided above the first inner cylinder 10b.

The cold air and hot air generating unit 20 are connected to the water supply pipe 21 and the water discharge pipe 22 and have a blowing fan 25 therein and the water supply pipe 21 is provided with cold water And a pump 23 for supplying hot water to the cold air and hot air generator 20 is provided.

In addition, temperature sensors 12a and 12b are provided on the lower and upper portions of the first inner cylinder 10b, respectively.

The temperature sensors 12a and 12b are connected to a controller (not shown) to sense the temperature of the water in the case 10 and control the operation of the refrigeration cycle and the heater 17. [

Next, the case of using the cold air and hot air generating apparatus according to the present invention as a cold air generating apparatus will be described.

In the present invention, a refrigeration cycle including an evaporator 13, a compressor 14, a condenser 15, and an expansion valve 16 is used.

The evaporator (13) is supplied with refrigerant at a low temperature and a low pressure which is lowered in temperature and pressure in the expansion valve (16), and evaporates it into a gas.

The refrigerant in the liquid state in the evaporator 13 absorbs the latent heat of evaporation from the outside and evaporates while changing the phase to superheated steam in a gaseous state.

At this time, the temperature of the water stored in the case 10 is lowered by depriving the ambient temperature.

The compressor (14) compresses the refrigerant, which has been phase-changed by superheated steam, into a gaseous state of high temperature and high pressure and supplies it to the condenser (15).

The condenser (15) cools the refrigerant gas at high temperature and high pressure by heat exchange with the outside air and changes it into a liquid state again.

The expansion valve 16 lowers the temperature and pressure of the refrigerant that has changed to the liquid state while passing through the condenser 15 so that the refrigerant of low temperature and low pressure can be easily evaporated into the evaporator 13 by the evaporator 13. [

That is, the evaporator 13 is a heat exchanger for lowering the ambient temperature while performing heat transfer to the outside, and the condenser 15 is a heat exchanger for increasing the ambient temperature while performing heat transfer with the outside.

In the present invention, since the evaporator (13) is provided inside the case (10), the water stored in the case (10) can be cooled.

A temperature sensor 12b is provided on the first inner cylinder 10b.

The temperature sensor 12b is connected to a controller (not shown) to sense the temperature of the water in the case 10 to control the operation of the refrigeration cycle.

That is, after the water in the case 10 is cooled to a predetermined temperature by the evaporator 13, the driving of the refrigeration cycle is stopped. When the temperature of the water rises to a certain temperature or higher after a certain time, .

Accordingly, it is not necessary to continuously drive the refrigeration cycle, so that the electricity cost can be reduced.

1, the cold air and hot air generating unit 20 according to the present invention (hereinafter referred to as a 'cold air generating unit' when used as a cold air apparatus for convenience of explanation) And the water discharge pipe 22, as shown in Fig.

The piping inside the cool air generating portion 20 is arranged in a zigzag shape to maximize heat exchange efficiency.

Further, it is preferable that a heat insulating material is further provided on the outer circumference of the water supply pipe 21 and the water discharge pipe 22.

With the above-described structure, it is possible to suppress the rise or fall of the water temperature to the utmost.

The cold water supplied through the water supply pipe 21 is circulated through the water discharge pipe 22 to the case 10 after a heat exchange process with air in the cold air generating unit 20.

A valve 24 is provided in each of the water supply pipe 21 and the water discharge pipe 22 at the inlet and outlet of the cold air generating unit 20.

The water supply pipe 21 is provided with a pump 23 for supplying water cooled in the case 10 to the cold air generating unit 20.

The blowing fan 25 provided inside the cold air generating unit 20 blows cold air generated in the course of the cold air exchanging heat with the air in the cold air generating unit 20 to the outside.

Hereinafter, the process of generating cold air in the cold air and hot air generating apparatus according to the present invention will be described.

First, a desired temperature is set in a controller (not shown), and then the cooling cycle is operated to lower the temperature of the water stored in the case 10.

When the temperature of the water inside the case 10 falls below a predetermined temperature, the pump 23 is operated to supply cold water to the cold air generating unit 20 through the cold water supply pipe 21.

The cold water supplied to the cold air generating unit 20 lowers the temperature inside the cold air generating unit 20 while exchanging heat with air.

At this time, when the blowing fan 25 provided in the cold air generating part 20 is operated, cold air can be blown to the outside of the cold air generating part 20.

The heat-exchanged water in the cool air generating portion 20 is circulated back to the case 10 through the water discharge pipe 22.

A typical air conditioner is excellent in cooling performance but consumes a lot of electric power, and it is a reality that it is difficult to actually use in an industrial field where a place is opened.

SUMMARY OF THE INVENTION The present invention is directed to solve the problems of the prior art described above, and it is an object of the present invention to supply cold air in the course of heat exchange between cooled water and air after cooling water first, instead of directly supplying air cooled by the refrigeration cycle.

Also, after the temperature of the water has dropped to a certain temperature, the refrigeration cycle is stopped, and the refrigeration cycle is operated again only when the temperature of the water rises to a certain temperature.

Accordingly, after cooling the water temperature to a predetermined temperature, it is not necessary to operate the refrigeration cycle until the water rises to a predetermined temperature, so that the electric cost can be greatly reduced.

Further, since the case 10 is constituted by a heat insulating case and the cold water supply pipe 21 and the cold water discharge pipe 22 are surrounded by the heat insulating material, the temperature rise of the water can be suppressed as much as possible.

Next, the case of using the cold air and hot air generating apparatus according to the present invention as a hot air generating apparatus will be described.

1, when the cold air and the hot air generating apparatus according to the first embodiment of the present invention are used as the hot air generating apparatus, the water is heated by the heater 17, 20 (hereinafter, referred to as "hot air generating unit" in the case of using as a hot air device for the sake of convenience of explanation), hot water is circulated while exchanging heat with air, thereby generating hot air.

The heater 17 according to the present invention is preferably provided under the first inner cylinder 10b as a waterproof electric heater, but is not limited thereto.

That is, other heating means instead of the electric heater 17 may be used.

A temperature sensor 12a is provided below the first inner cylinder 10b.

The temperature sensor 12a is connected to a controller (not shown) to sense the temperature of the water in the case 10 and controls the operation of the heater 17. [

That is, when the heater 17 is heated to heat the water in the case 10 to a predetermined temperature, the operation of the heater 17 is stopped. When the temperature of the water falls to a predetermined temperature or lower after a certain period of time, The heater 17 is heated again.

Accordingly, it is not necessary to continuously heat the heater 17, so that the electric cost can be reduced.

The hot water supplied through the water supply pipe 21 undergoes a heat exchange process with air in the hot air generating unit 20.

The blowing fan 25 provided in the inside of the hot air generating unit 20 blows warm air generated in the course of heat exchange with the air in the hot air generating unit 20 to the outside.

The heat-exchanged water in the hot air generating unit 20 is circulated back to the case 10 through the water discharge pipe 22.

Hereinafter, the process of generating hot air in the cold air and hot air generating apparatus according to the first embodiment of the present invention will be described.

First, a desired temperature is set in a controller (not shown), and then the heater 17 is operated to heat the temperature of the water stored in the case 10.

When the temperature of the water inside the case 10 is heated to a predetermined temperature or more, the pump 23 is operated to supply the warmed water to the hot air generating unit 20 through the water supply pipe 21.

The warm water supplied to the hot wind generating unit 20 increases the temperature inside the hot wind generating unit 20 while performing heat exchange with the air.

At this time, when the blowing fan 25 provided inside the hot air generating unit 20 is operated, warmed air can be blown to the outside of the hot air generating unit 20.

The heat-exchanged water in the hot air generating unit 20 is circulated back to the case 10 through the water discharge pipe 22.

The conventional electric heater-type air heater is excellent in heating performance, but it has a disadvantage in that the amount of oxygen in the air is reduced in the process of heating the electric heater, thereby causing an uncomfortable feeling for a long time.

Therefore, it is troublesome to ventilate frequently in order to use it indoors for a long time.

Further, in order to generate hot air in a conventional electric heater type air heater, the heater must be continuously heated. Thereby increasing the amount of electricity consumed.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to generate warm air in the course of heat exchange between heated water and air after heating the electric heater with an electric heater.

Also, after the temperature of the water rises to a certain temperature, the operation of the heater is stopped, and the heater is operated again only when the temperature of the water falls below a predetermined temperature.

That is, once heated water does not have a low temperature lowering speed, it is not necessary to continuously operate the heater.

Further, since the case 10 is formed of a heat insulating case and the water supply pipe 21 and the water discharge pipe 22 are surrounded by the heat insulating material, the temperature drop of the water can be suppressed as much as possible.

Thus, after heating the water temperature to a predetermined temperature, it is not necessary to operate the heater until the water rises to a predetermined temperature, so that the electric cost can be greatly reduced.

Accordingly, the present invention can be very useful when it is necessary to perform local heating in various industrial fields.

≪ Embodiment 2 >

Fig. 2 shows a second embodiment of the present invention.

The second embodiment of the present invention is a modification of the case structure in the first embodiment.

In the case 10 according to the second embodiment of the present invention, as shown in Fig. 2, a vacuum A is formed in a space between the outer cylinder 10a and the first inner cylinder 10b.

The other points are the same as those in the first embodiment, and therefore duplicate descriptions will be omitted.

≪ Third Embodiment >

Fig. 3 shows a third embodiment of the present invention.

The third embodiment of the present invention is a modification of the case structure in the first embodiment.

The case 10 according to the third embodiment of the present invention is further provided with a second inner cylinder 10c inside the first inner cylinder 10b as shown in Fig.

A foam material 11 is filled between the outer cylinder 10a and the first inner cylinder 10b and a vacuum A is formed in the space between the first inner cylinder 10b and the second inner cylinder 10c do.

According to the third embodiment of the present invention, the heat insulating performance of the case 10 can be further improved.

The other items are the same as those in the first embodiment described above.

<Fourth Embodiment>

4 shows a fourth embodiment of the present invention.

The fourth embodiment of the present invention is characterized in that the case 10 is divided into a lower case 10d and an upper case 10e in the first embodiment and an evaporator 13 as a refrigeration cycle component is provided in the lower case 10d And a heater 17 is installed in the upper case 10e.

That is, the inside of the case 10 is divided into a lower case 10d and an upper case 10e by a partition 18 provided horizontally as shown in FIG.

A plurality of through holes 18a are formed in the partition 18 so that water in the lower case 10d and water in the upper case 10e can be circulated to each other through the through holes 18a.

An evaporator 13 is provided on the upper part of the lower case 10d and a heater 17 is provided on the lower part of the upper case 10e.

The lower case 10d is connected to a water supply pipe 21 for supplying water to the cold air generating unit 20 and the upper case 10e is provided with a water discharge unit The water discharge pipe 22 is connected.

However, the present invention is not limited thereto, and the water supply pipe 21 may be connected to the upper case 10e and the water discharge pipe 22 may be connected to the lower case 10d.

The other points are the same as those in the first embodiment, and therefore duplicate descriptions will be omitted.

<Fifth Embodiment>

5 shows a fifth embodiment of the present invention.

The fifth embodiment of the present invention is a modification of the structure of the case 10 in the fourth embodiment in which the case 10 is divided vertically.

In the case 10 according to the fifth embodiment of the present invention, as shown in Fig. 5, a vacuum A is formed in a space between the outer cylinder 10a and the first inner cylinder 10b.

The other items are the same as those in the fourth embodiment described above.

<Sixth Embodiment>

6 shows a sixth embodiment of the present invention.

The sixth embodiment of the present invention is a modification of the case structure in the fourth embodiment in which the case 10 is divided into upper and lower parts.

The case 10 according to the sixth embodiment of the present invention is further provided with a second inner cylinder 10c inside the first inner cylinder 10b as shown in Fig.

A foam material 11 is filled between the outer cylinder 10a and the first inner cylinder 10b and a vacuum A is formed in the space between the first inner cylinder 10b and the second inner cylinder 10c do.

According to the sixth embodiment of the present invention, the heat insulating performance of the case 10 can be further improved.

The other items are the same as those in the fourth embodiment described above.

The foregoing description of preferred embodiments of the present invention has been provided for purposes of illustration and description. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: Case
10a: outer tube
10b: first inner cylinder
10b: second inner cylinder
10d: lower case
10e: upper case
11: Foam material
12a and 12b: a temperature sensor,
13: Evaporator
14: Compressor
15: Condenser
16: Expansion valve
17: Heater
18:
18a: Through hole
20: cold wind and hot wind generator
21: Water supply piping
22: Water discharge pipe
23: Pump
24: Valve
25: blowing fan
A: Jean

Claims (11)

A cold wind and a hot wind generating unit 20 for selectively generating cold wind or hot wind while circulating water cooled or heated in the case 10; In the apparatus,
A heater 17 which is provided with a refrigeration cycle including an evaporator 13, a compressor 14, a condenser 15 and an expansion valve 16 and is electrically heated,
The case (10)
A heat insulating case made up of an outer cylinder 10a, a first inner cylinder 10b and a second inner cylinder 10c. The space between the outer cylinder 10a and the first inner cylinder 10b is filled with a foaming material 11,
The foam material (11) is made of polyurethane,
A vacuum (A) is formed in a space between the first inner cylinder (10b) and the second inner cylinder (10c)
A heater 17 is provided below the first inner cylinder 10b and an evaporator 13 is provided above the first inner cylinder 10b.
The cold air and hot air generating unit (20)
Connected to the water supply pipe 21 and the water discharge pipe 22, and provided with a blowing fan 25 therein,
A pump 23 for supplying cold water or hot water to the cold air and hot air generator 20 is installed in the water supply pipe 21,
A heat insulating material is further provided on the outer circumference of the water supply pipe 21 and the water discharge pipe 22
Temperature sensors 12a and 12b are respectively provided on the lower and upper portions of the second inner cylinder 10c,
Wherein the cold wind or the hot wind generating unit (20) selectively blows cold wind or hot wind. delete delete delete delete delete delete delete delete delete delete

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