KR20050099207A - Air conditioner - Google Patents

Abstract

The present invention relates to an integrated air conditioner using a refrigeration cycle of a refrigerant circulating a compressor, a condenser, a capillary tube, and an evaporator, and in particular, a pair of double tube condensate installed in both sides of a rectangular induction housing below a pair of spaced apart evaporators. The heat recovery device is individually arranged to use the low-temperature refrigerant flowing into the compressor and the condensate generated in the evaporator to re-use the high-temperature refrigerant circulating from the condenser to the capillary tube to a cooling heat source for recycling.

The present invention comprises a pair of divided condensers arranged in series at regular intervals by dividing the condenser of the same capacity; A pair of split evaporators spaced apart by a predetermined distance by dividing an evaporator of the same capacity so as to prevent heat transfer failure due to water film formation on the split condenser; A guide housing having a guide member disposed below the split evaporator and supporting a pair of split evaporators at both sides of the insertion groove formed in multiple stages, and configured to smoothly guide air passing through the split evaporator to the upper air supply fan;

The condensate heat recovery unit is installed in the lower portion of the split evaporator and has a condensate heat recovery unit for recondensing the condensed refrigerant of the high temperature state condensed first through the condenser by using the low temperature condensate generated from the split evaporator and the evaporative refrigerant flowing into the compressor from the evaporator. It is done by making.

Description

Air conditioner

The present invention relates to an integrated air conditioner using a refrigeration cycle of a refrigerant circulating a compressor, a condenser, a capillary tube, and an evaporator, and in particular, a pair of double tube condensate installed in both sides of a rectangular induction housing below a pair of spaced apart evaporators. The heat recovery unit is individually disposed and recycles the high temperature refrigerant circulating from the condenser to the capillary tube as a cooling heat source by using condensate generated from the evaporator and the low temperature refrigerant flowing into the compressor to prevent the overload of the compressor, thereby greatly improving the refrigerating efficiency. It is about air conditioning to make one.

In general, an air conditioner using a refrigeration cycle of a refrigerant includes a compressor (2) for sucking refrigerant gas of low temperature and low pressure from the evaporator (1) and compressing it into refrigerant gas of high temperature and high pressure, as shown in FIG. A condenser (3) for liquefying and dissipating high-temperature, high-pressure refrigerant gas by condensation, a capillary tube (4) for decompressing and expanding the refrigerant liquid liquefied in the condenser (3), and the capillary tube (4). It is composed of an evaporator (1) for absorbing the refrigerant liquid expanded through the endothermic action by evaporation to cool and humidify the hot and humid air.

In the conventional air conditioner having the above configuration, indoor high temperature and high humidity air introduced by the air supply fan 5 is cooled and condensed below the dew point while passing through the surface of the evaporator 1 cooled by the evaporation of the refrigerant. .

Therefore, the moisture in the air is condensed into dewdrops are converted into condensate, and then fall naturally after being collected through a condensate tray and discharged to the outside, and the cooled and dehumidified air passing through the evaporator 1 is supplied to the air supply fan 5. By the air supply to the room repeatedly.

At this time, for the purpose of improving the condensation efficiency, the methods of recycling in the heat exchange process of condensing the refrigerant gas without discharging a considerable amount of condensate generated by the cooling condensation of moisture in the air by the evaporation of the refrigerant in the evaporator (1) Various attempts were made.

As a conventional method of recycling the condensate as described above, a method of collecting the condensate in the water reservoir and then directly injecting the condensate to the condenser by using a pump, and a method of atomizing the condensate directly by using an ultrasonic vibrator to spray the condenser directly; A method of reliquefying a refrigerant by incorporating a condensation refrigerant pipe inside the condensate storage tank has been proposed.

However, in the conventional condensate recycling method, when a condensate storage tank is disposed under the condenser, and the condensate is directly injected to the condenser using a pump or an ultrasonic vibrator, the injected condensate evaporates and is not discharged to the outside. As water is converted into water and dropped into the condensate storage tank, the water temperature in the storage tank is increased, resulting in a problem of condensation failure caused by hot sprayed water.

In addition, when the condensate refrigerant pipe is built in the condensate storage tank to reliquefy the refrigerant, the condensate generated in the evaporator is absolutely insufficient in the amount of condensate required for recondensation. Raising to near, reliquefaction was virtually impossible.

In order to solve this problem, the patent application No. 2001-0053029 entitled "Integrated heating and cooling device for energy recovery", which was filed by the applicant of the present invention and granted a patent registration, was proposed.

In the prior art, as shown in FIGS. 9 to 10, the condensed water dropped from the evaporator 1 by the condensate heat recovery unit 7 disposed below the evaporator 1 may be directly recovered without a separate storage tank. The condensate heat recovery unit 7 is a heat transfer inner tube that is an evaporative refrigerant tube connecting the evaporator 1 and the compressor 2 to the inside of the heat transfer exterior 7a which is a condensation refrigerant tube connecting the condenser 3 and the capillary tube 4. Consists of a double tube (7b) inserted to re-liquefy the refrigerant circulating from the condenser (3) to the capillary tube (4) using the condensate generated in the evaporator (1) and the refrigerant flowing into the compressor (2) By recycling in the heat exchange process was able to effectively prevent the condensation failure caused by the use of conventional condensate.

However, although the prior art is a useful invention that effectively prevents condensation failure, it has other problems as follows.

First, a part of the condensate generated in the evaporator 1 is scattered by the strong suction force of the air supply fan 5 without falling down the evaporator 1, and the scattered condensate is condensed water heat recovery unit 7 and the collecting channel 8 ) Through the wide gap between the condensate heat recovery device (7) and directly to the water collecting channel (8) and discharged to the outside through the discharge port causes the problem that the entire amount of condensate generated in the evaporator (1) cannot be recycled It was becoming.

Second, since the condensate heat recovery unit 7 is directly exposed to the inflowing air, the condensate heat recovery unit 7 may interfere with the flow of the condensate water flowing into the condensate heat recovery unit 7 to reduce the heat exchange efficiency.

Third, since heat transfer fins are not provided in the heat transfer inside of the condensate heat recovery unit 7 and the exteriors 7b and 7a, heat recovery efficiency is not sufficient because heat recovery from the evaporative refrigerant and condensate flowing into the compressor 2 is not performed. It was to be degraded.

Fourth, the vertically disposed evaporator 1 is configured such that the heat transfer fins 1b having high heights cross each other in the refrigerant pipes 1a stacked in plural numbers, and the moisture in the air introduced by the air supply fan 5. The condensed water generated by cooling condensation by the evaporation of the refrigerant flows along the heat transfer fin 1b of the evaporator 1.

At this time, a plurality of refrigerant pipes (1a) installed to cross the heating fins 1b interfere with the flow of condensate flowing along the heating fins (1b) to form a water film between the heating fins (1b) and the heating fins (1b). As it flows down, it blocks the flow path of the inlet air, causing heat transfer problems, thereby lowering the cooling capacity.

The present invention is to solve the above problems, respectively installed a double-pipe condensate heat recovery unit at the bottom of a pair of spaced evaporator spaced apart so that the condensate heat recovery unit is installed on both sides of the induction housing so as not to be exposed to the evaporator Smoothly guides the entire amount including the condensate and the condensate partially scattered by the air supply fan to the condensate heat recovery unit to drastically improve the refrigeration efficiency through the heat exchange process, and at the same time the induction member in the center of the induction housing The main purpose of the present invention is to provide an air conditioner which reduces noise generation by preventing the cooling and dampened air concentrated in the center through the pair of evaporators by the suction force of the air supply fan so as not to form a vortex.

In addition, the present invention is to reduce the height of the heat transfer fins by dividing the evaporator of the same capacity in pairs and at the same time to reduce the number of stages of the refrigerant pipes to prevent the heat transfer failure due to the water film formed in the refrigerant pipes between the heat transfer fins. It is for a different purpose.

The present invention for achieving the desired object is a pair of divided condenser which is arranged at a constant interval by dividing the condenser of the same capacity;

A pair of split evaporators spaced apart by a predetermined distance by dividing an evaporator of the same capacity so as to prevent heat transfer failure due to water film formation on the split condenser;

A guide housing having a guide member disposed below the split evaporator and supporting a pair of split evaporators at both sides of the insertion groove formed in multiple stages, and configured to smoothly guide air passing through the split evaporator to the upper air supply fan;

The condensate heat recovery unit is installed in the lower portion of the split evaporator and has a condensate heat recovery unit for recondensing the condensed refrigerant of the high temperature state condensed first through the condenser by using the low temperature condensate generated from the split evaporator and the evaporative refrigerant flowing into the compressor from the evaporator. It is done by making.

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

The present invention relates to an air conditioner using a refrigeration cycle in which a refrigerant circulates through a compressor (2), a condenser (3), a capillary tube (4), an evaporator (1), and the like. A pair of split evaporators 20 are fitted to both sides of the upper inserting groove 31 of the housing 30, and a double tube condensate heat recovery 40 is inserted into the lower inserting groove 32 of the split evaporator 20. Recondensing the condensation refrigerant circulated in the capillary tube 4 after being condensed primarily through the divided condenser 10 by using the condensed water generated in the split evaporator 20 and the evaporative refrigerant introduced into the compressor 2 so as not to be exposed. It is a characteristic gist of the invention that the refrigerating efficiency is remarkably improved by preventing overload of the compressor 2 by recycling in the heat exchange process.

The present invention for achieving the above-mentioned characteristic gist is a condenser (3) for liquefying and dissipating the refrigerant gas of the high temperature and high pressure compressed by the compressor (2), and the refrigerant liquid liquefied in the condenser (3) A capillary tube (4) for depressurizing and expanding to facilitate evaporation, an evaporator (1) for cooling and dehumidifying hot and humid air by absorbing refrigerant liquid expanded through the capillary tube (4) by evaporation, and the evaporator (1) In a well-known air conditioner repeatedly performing a refrigeration cycle in which the refrigerant gas evaporated while passing through the compressor 2 is recovered, the condenser 3 having the same capacity is roughly divided into small parts as shown in FIG. 3. A pair of split condenser 10 continuously arranged at a predetermined interval, and a pair of split evaporators 20 separately spaced by a predetermined distance by dividing the evaporator 1 of the same capacity into a small size above the split condenser 10; , Minutes An induction housing 30 in which the split evaporator 20 and the condensate water recovery unit 40 are fitted in the insertion grooves 31 and 32 formed in the multi-stage and disposed below the evaporator 20, and the induction housing 30 of the induction housing 30. Primary condensed through the split condenser 10 by using the condensate of low temperature generated in the split evaporator 20 and the evaporative refrigerant flowing into the compressor 2 from the split evaporator 20. It can be seen that it consists of a pair of condensate heat recovery unit 40 for recondensing the condensation refrigerant in a high temperature state.

Next, the present invention having the schematic configuration will be described in more detail.

First of all, the split condenser 10 of the present invention is installed in the lower side of the air conditioner case 9 and is subjected to high temperature and high pressure through the compressor 2 by using outdoor air sucked through the inlet 9a by the heat dissipation fan 6. By performing the role of condensing the refrigerant gas of the conventional condenser 3, unlike the conventional condenser (3) by dividing the condenser 3 of the same size to form a pair of divided condenser 10.

The reason why the condenser 3 of the same capacity is divided into small parts is that the condenser 3 occupies a very large occupied area in the construction of medium and large air conditioners. In order to solve the problem that the heat exchange action by the heat dissipation fan 6 is not smoothly performed on the part (heat exchange blind spot), the divided condenser 10 of the present invention has a reduced occupancy area and height even though it has the same capacity. The lower the heat exchange efficiency by the heat radiating fan 6 can be further improved.

The split evaporator 20 disposed above the split condenser 10 divides the evaporator 1 having the same capacity into a smaller size than the conventional general evaporator 1 like the split condenser 10. 20) to be spaced apart by a predetermined distance and the lower end is inserted into both sides of the upper insertion groove 31 of the induction housing 30.

The reason why the same capacity of the evaporator 1 is divided into small parts is that the condensed water generated by cooling and condensation due to the evaporation of the refrigerant flows downward by the refrigerant pipe 1a installed to intersect the heat transfer fin 1b. This prevents the formation of a water film as well as the water film gradually increases in size toward the bottom to fundamentally solve the heat transfer obstacle that prevents condensate from falling.

That is, since the split evaporator 20 of the present invention is manufactured in a small size with the same capacity, the overall height of the heat transfer fin 1b is lowered and the number of stages of the refrigerant pipe 1a is reduced, so that the formation of the water film is insignificant. The heat transfer efficiency is guaranteed.

The induction housing 30, which serves to store the split evaporator 20 and the condensate heat recoverer 40, has a storage function as well as condensate falling from the split evaporator 20 and the condensate that is scattered and dropped. At the same time, the core technology of the present invention serves both to guide and effectively prevent the scattering of the condensate flowing from the split evaporator 20 to the condensate heat recovery unit 40.

The induction housing 30 has a rectangular shape as a whole, and the insertion grooves 31 and 32 in which the split evaporator 20 and the condensate water recovery unit 40 are fitted around the four sides are formed in multiple stages so as to communicate in all directions. An induction member 33 protrudes in the center of the insertion grooves 31 and 32 to smoothly guide the hot and humid air passing through the pair of split evaporators 20 to the upper air supply fan 5.

The induction member 33 is formed as a mountain inclined upward as both sides inwardly upward, the high temperature and humid air introduced from both sides of the pair of split evaporators 20 arranged on both sides is divided evaporator by the evaporation of the refrigerant. Cooling and condensation at 20 produce condensate.

In the process of generating condensate, some of the condensate is naturally dropped into the condensate heat recovery unit 40 disposed below the split evaporator 20, and the remaining condensate is attracted by the air supply fan 5 installed on the induction member 33. After being scattered by the guide member 33, the entire amount can be guided to the condensed water heat recovery unit 40 installed in the insertion groove 32.

In addition, the induction member 33 not only serves to guide all the condensate water to the condensate heat recovery unit 40 but also smoothly induces the air passing through the split evaporator 20 from the lower part to the upper part so as not to be congested. (5) It also serves to inflow into the air supply fan (5), by concentrating and stagnating in the center of the hot and humid air to prevent the generation of noise due to the generation of vortex

Insertion grooves 31 and 32 to which the split evaporator 20 and the condensate water recovery unit 40 are fitted are continuously formed in multiple stages as shown in FIG. 5, and the split evaporator is formed in the upper insertion groove 31. While the lower end of 20) is partially inserted, the split evaporator 20 is installed in the lower insertion groove 32 so that the condensate heat recovery unit 40 is not exposed to the air introduced by the air supply fan 5. The total amount of condensed water, including the condensate falling from and partly scattered and dropped, may be guided to the condensate heat recovery unit 40. In addition, the condensate flowing down from the split evaporator 20 to the condensate heat recovery unit 40 is prevented from scattering.

In the lower portion of the lower insertion groove 32, a water collecting passage 34 having a shape of a vertical light narrowing narrowed in cross-section by a lower portion is installed in communication. Therefore, after collecting the condensed water dropped through the first heat transfer fin 45 of the condensate water recovery unit 40 is discharged to the outside through the discharge port 35 formed at a predetermined position of the collecting channel 34.

On the other hand, a pair of condensate heat recovery unit 40 for recondensing the condensation refrigerant of the first condensed high temperature state is the evaporation refrigerant pipe (9a) and the split condenser (10) connecting the split evaporator 20 and the compressor (2) It is disposed between the condensation refrigerant pipe (9c) connecting the capillary tube (4c), the condensation refrigerant and the condensate refrigerant circulating from the split condenser 10 to the capillary tube (4) by mutual heat exchange using condensate and evaporative refrigerant At the same time, by increasing the dryness of the evaporative refrigerant flowing into the compressor (2) from the split evaporator 20 to prevent overload of the compressor (2) and deterioration of the refrigeration efficiency.

The condensate heat recovery unit 40 is the condensation refrigerant liquefied in the split condenser 10 is introduced through the inlet 41 formed on one side and the condensation refrigerant is recondensed by the condensate and evaporative refrigerant while passing through the other side outlet An evaporative refrigerant evaporated from the split evaporator 20 through an inlet opening 41a of one side end and a heat transfer appearance 43 introduced into the capillary tube 4 through 42 and the heat transfer exterior 43. After the inflow, the evaporative refrigerant flows countercurrently with the condensation refrigerant, and comprises a double tube type including a heat transfer inner tube 44 introduced into the compressor 2 through an outlet 42a at the other end.

That is, as shown in FIG. 6, the condensation refrigerant of the high temperature state condensed in the split condenser 10 is introduced into the capillary tube 4 through the inside of the heat transfer envelope 43, while the evaporation evaporated in the split evaporator 20. The refrigerant is heat-exchanged while flowing inside the heat transfer inner tube 44 to be counter-current with the condensation refrigerant. At the same time, the low temperature condensed water generated by the split evaporator 20 further flows the first condensed refrigerant of the first condensation through a complex heat exchange process in which the outside of the heat transfer envelope 43 flows in a cross flow with the condensation refrigerant. Effective recondensation can be achieved.

Here, the outer periphery of the heat transfer facade 43 is provided with a plurality of first heat transfer fins 45 of the rectangular body for recovering the heat of condensate water at equal intervals, as shown in Figure 7, the inner periphery of the heat transfer facade 43 And a plurality of second heat transfer fins 46 are radially installed on the outer circumference of the heat transfer inner tube 44. At this time, the second heat transfer fins 46, which are installed to face the inner and outer surfaces 44 and 43, are installed so that both ends thereof are maintained at a predetermined interval to prevent heat exchange more than necessary, by the evaporative refrigerant introduced into the compressor 2. The compressor 2 is prevented from overheating.

In the drawings, reference numeral 9d denotes an air supply box.

The cooling process according to the present invention having such a configuration will be described.

First, the cooling process will be described based on FIG. 1. The inside of the heat transfer envelope 43 is a high-temperature condensation refrigerant circulating from the condenser 3 to the capillary tube 4. The evaporative refrigerant flowing into the compressor (2) from the split evaporator 20 is heat exchanged while flowing countercurrently with the condensation refrigerant.

At the same time, the condensation refrigerant is discarded to the outside as the condensed water generated in the split evaporator 20 flows down to the outside of the heat transfer envelope 43 so as to cross-flow with the condensation refrigerant flowing inside the heat transfer envelope 43. Recondensation is carried out by using the heat of condensate and evaporative refrigerant to obtain better condensation efficiency.

In this recondensation process, the split evaporator 20 and the condensate water recovery unit 40 of the present invention are installed in the insertion grooves 31 and 32, as well as the condensate naturally falling from the split evaporator 20, as well as the supply fan 5. The entire amount including the condensed water is partially induced by the condensate heat recovery unit 40 can be recycled to the entire amount of the condensate generated in the split evaporator (20).

Furthermore, the condensate heat recovery unit 40 is not directly exposed to the incoming air, so that despite the suction force of the air supply fan 5, the condensate heat recovery unit 40 does not obstruct the flow of condensate that flows down to the condensation heat recovery unit 40. It is improved to have excellent cooling performance.

The present invention is introduced on both sides of the induction housing so that the condensate heat recovery unit is not exposed to the outside, so that the total amount of condensate including condensate naturally falling from the split evaporator and some of the condensate scattered by the supply fan is smoothly guided to the condensate heat recovery unit Through this process, cooling performance can be significantly improved.

In addition, since the condensate heat recovery unit is not directly exposed to the inflowing air, despite the strong suction force of the air supply fan, the flow of condensate that flows down to the condensation unit heat recovery unit is smooth, thereby improving heat exchange efficiency.

In addition, the air concentrated in the center by the suction force of the air supply fan is guided smoothly to the air supply fan of the upper portion by the induction member of the mountain type to have the effect of blocking the noise generated by the vortex generated by the concentration, stagnant in the center. .

1 is a conceptual diagram of a refrigeration cycle of the air conditioner to which the present invention is applied

Figure 2 is an exploded perspective view of the main part of the present invention

Figure 3 is a longitudinal sectional view showing the internal structure of the present invention

4 is a plan view of the present invention induction housing

Figure 5 is a longitudinal cross-sectional view of the condensate heat recovery unit and the split evaporator coupled to the present invention induction housing

Figure 6 is a front sectional view of the present invention condensate heat recovery unit

Figure 7 is a side cross-sectional view of the condensate heat recovery unit of the present invention

8 is a conceptual diagram of a refrigeration cycle of a conventional air conditioner

9 is a front sectional view of a conventional condensate heat recovery unit;

10 is a side cross-sectional view of a conventional condensate heat recovery unit

[Explanation of symbols on the main parts of the drawings]

2: compressor 4: capillary

7, 40: condensate heat recovery unit 7a, 43: heat transfer appearance

7b, 44: Heat pipe 10: Split condenser

20: split evaporator 30: induction housing

31, 32: insertion groove 33: guide member

45: first heating fin 46: second heating fin

Claims (7)

A condenser (3) for dissipating and liquefying the refrigerant gas of the high temperature and high pressure compressed by the compressor (2), and a capillary tube (4) for decompressing and expanding the liquid to liquefy the refrigerant liquid liquefied in the condenser (3). And an evaporator 1 for absorbing the refrigerant liquid expanded through the capillary tube by the evaporation action to cool and dehumidify the hot and humid air, and the refrigerant gas evaporated through the evaporator 1 again to the compressor 2. In the air conditioner repeatedly performing the freezing cycle recovered in A pair of divided condensers 10 which are divided by condenser having the same capacity and continuously arranged at a predetermined interval; A pair of split evaporators 20 which are spaced apart by a predetermined distance by dividing an evaporator of the same capacity so as to prevent heat transfer failure due to water film formation on the split condenser 10; The lower part of the split evaporator 20 is fitted to both sides of the split evaporator 20 and the insertion grooves 31 and 32 formed in multiple stages are inserted therein, and the air passing through the split evaporator 20 in the center is supplied to the upper part. An induction housing 30 in which an induction member 33 is smoothly guided to the fan 5; Split condenser 10 using the condensate of low temperature generated in the split evaporator 20 and the lower insertion groove 32 and the evaporative refrigerant introduced from the split evaporator 20 to the compressor 2 in the split evaporator 20. Air conditioning, characterized in that consisting of the condensate heat recovery unit 40 for recondensing the condensation refrigerant of the high-temperature condensed primary through. The method according to claim 1, The split condenser 10 divides and installs the condenser 3 of the same capacity in small size in order to reduce the occupied area occupied by the existing condenser 3 in the construction of medium and large air conditioners and to improve the heat exchange efficiency by the heat radiating fan 6. Air conditioner characterized in that. The method according to claim 1, The split evaporator 20 divides the evaporator 1 of the same capacity into a small size so as to prevent heat transfer caused by the water film generated between the heating fins 1b, thereby lowering the height of the heating fins 1b and at the same time the refrigerant pipe 1a. Air conditioner characterized in that the number of stages in the upper housing groove 31 of both sides of the guide housing 30 in the state reduced. The method according to claim 1, Induction housing 30 is communicated in all directions, the insertion groove 31, 32 is formed in multiple stages in which the split evaporator 1 and the condensate water recovery 40 are fitted, and the insertion groove 31, 32 in the center Mountain guide member 33 is installed to smoothly guide the air passing through a pair of split evaporators 20 to the air supply fan 5 at the same time and to block the generation of vortices to suppress the generation of noise. The water collecting passage 34 for collecting the condensed water dropped through the first heat transfer pin 45 of the condensate heat recovery unit 40 so as to communicate with the lower portion 31, 32 and discharged to the outside through the outlet 35 is installed. Air conditioner characterized in that. The method according to claim 1 or 4, Insertion grooves 31 and 32 are continuously formed in multiple stages, and a lower end portion of the split evaporator 20 is partially supported by the insertion groove 31 of the upper portion, and a condensate heat recovery unit is inserted into the insertion groove 32 of the lower portion. While the condensed water 40 is not exposed to the air introduced by the air supply fan 5, the condensed water falling from the split evaporator 20 and the condensed water that is scattered and dropped are guided to the condensate heat recovery 40. Air conditioner, characterized in that to prevent the scattering of condensate flowing from the evaporator 20 to the condensate heat recovery (40). The method according to claim 1, The condensate heat recovery unit 40 is a condensation refrigerant of the high temperature state condensed in the split condenser 10 is introduced into the capillary tube 4 through the interior of the heat transfer envelope 43, while the condensate heat evaporator 20 evaporates from the split evaporator 20. The evaporated refrigerant is heat-exchanged while flowing inside the heat transfer inner tube (44) installed through the heat transfer exterior (43) to flow countercurrently with the condensation refrigerant, and at the same time, the low-temperature condensed water generated in the split evaporator (20) is transferred to the heat transfer exterior (43). An air conditioner characterized by recondensing the hot condensation refrigerant of the first condensed by heat exchange while flowing the outside of the condensation refrigerant cross-flow. The method according to claim 6, On the outer circumference of the heat transfer envelope 43, a plurality of first heat transfer fins 45 for recovering the heat of condensation water are installed at equal intervals, and the inner circumference of the heat transfer envelope 43 and the outer circumference of the heat transfer inner tube 44 are provided. A plurality of second heat transfer fins 46 are disposed radially, and the second heat transfer fins 46 installed opposite to the inner and outer surfaces 44 and 43 of the heat transfer maintain both ends at predetermined intervals to prevent heat exchange more than necessary. Air conditioner characterized in that the installation.