JPH07208826A - Air conditioner - Google Patents

Abstract

PURPOSE:To make manufacturing cost, facility cost and construction cost low by reducing in size, simplifying a structure to be adapted for a domestic product, decreasing number of components, and facilitating manufacture and assembling. CONSTITUTION:An evaporating tube 4B is provided at an evaporating tube 4A disposed at a passage 2 for passing indoor air via a bent part 4C, and an absorbent injector 8 from a regenerator 31 is provided at the tube side from the bent part. Thus, the absorbent injected from the injector flows down on an inner surface of the tube to absorb vapor refrigerant at an absorbing tube to be recovered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, which is suitable for use as an absorption refrigerating machine for home use, a combined cooling / heating machine, and a dedicated cooling machine, for example, as a liquid refrigerant generated in an evaporator. The steam is efficiently collected and operated.

[0002]

2. Description of the Related Art Conventionally, a medium- or large-sized air conditioner (air conditioner) evaporates a liquid refrigerant such as water under vacuum, and cools circulating water by a heat exchange phenomenon due to the heat of vaporization. Then, there has been a system in which this circulating water is circulated in each room and cool air is sent from an indoor unit by a fan to cool the room. That is, FIG.
As shown in FIG. 1, one end is connected to the liquid refrigerant supply pipe 20, the other end is connected to the absorption pipe 21, and the evaporation pipe 23 in which the circulating water 22 flows in is maintained in a vacuum state of about 10 torr. An evaporator 1'which meanders and is housed inside, and an absorber 5'which is connected to one end of the absorption pipe 21 and contains therein a concentrated solution of lithium bromide Li, and which can be cooled by a radiating fan 24. Lithium bromide storage tank 2
6, and the other end of a communication pipe 28 having a pump 27 connected to the lower end of the lithium bromide storage tank 26 is connected to the lower end on one side, and is inserted in the upper part of the one side of the lithium bromide storage tank 26. Recovery pipe 29 with one perforated end 29a possible
The other end of which is connected to one side of the upper part, a lower surface of which is provided with a regenerator 31 that is capable of heating the burner 30, and one end of which is connected to the regenerator 31 through a communication pipe 32, and the other end of which is the liquid refrigerant. It is formed of a condenser 34 to which the supply pipe 20 is connected and which can be cooled by a cooling fan 33.

When the circulating water 22 flows in and the water as the liquid refrigerant 3 is dropped from the liquid refrigerant supply pipe 20 onto the surface of the evaporation pipe 23 meandering in the evaporator 1 ', it diffuses on the surface of the evaporation pipe 23. The liquid refrigerant 3 thus evaporated evaporates and cools the circulating water 22 flowing into the evaporation pipe 23 by its heat of vaporization. Then, since the vapor refrigerant A is filled in the evaporator 1 ', the vapor refrigerant A filled in the absorber 5'by the concentrated lithium bromide solution Li stored in the lithium bromide storage tank 26. Is absorbed. Then, the lithium bromide dilute solution Li ′ having absorbed the vapor refrigerant A is sent to the regenerator 31 by the pump 27.

In the regenerator 31, the diluted lithium bromide solution Li 'is concentrated by heating by the burner 30 to separate the concentrated lithium bromide solution Li and the vapor refrigerant A, and then the vapor refrigerant A is connected from the regenerator 31 to a communication pipe. After being cooled by the cooling fan 33 in the condenser 34 via the condenser 32, it is fed again into the evaporator 1 ′ through the liquid refrigerant supply pipe 20. Moreover, the concentrated lithium bromide solution Li recovered from the regenerator 31 is dispersed through the recovery pipe 29 from the one end 29a having the hole into the lithium bromide accommodation tank 26 and recovered. Then, the liquid refrigerant 3 is dropped to cool the water, and the circulating water 22 flowing into the plurality of evaporation pipes 23 arranged in the evaporator 1'is supplied to each room and circulates to cool the room. To use as.

Further, as another conventional example of an air conditioner, an evaporator is positioned in a passage through which indoor air passes, the indoor air is directly cooled, and the cold air is blown into the room through a duct.
There was a method of cooling.

Further, as an improvement of the absorber for home use or for an absorption refrigerator having a capacity in the vicinity thereof, there is, for example, one shown in FIG. That is, the absorber T is composed of a large number of fins a provided in the vertical direction and a heat transfer tube b provided in contact with these fins a, and an introduction hole c for guiding the absorbing liquid to the heat transfer tube b. The heat transfer tube b is provided with a liquid dispersion tube f having an annular groove d communicating with the introduction hole c formed on the outer peripheral wall and a plurality of dispersion holes e communicating with the annular groove d formed on the lower wall. It is a composition. g is a refrigerant vapor introduction pipe.

The absorbing liquid enters through the introduction hole c, passes through the space between the heat transfer pipe b of the absorber T and the liquid dispersion pipe f, and is dispersed through the dispersion hole e. Since the introduction hole c to the dispersion hole e has a semi-closed structure and is very small in volume, the supplied absorption liquid is uniformly ejected from the plurality of dispersion holes e regardless of the amount of liquid, and vapor is generated. It efficiently absorbs the refrigerant.

[0008]

However, the conventional air conditioner for cooling shown in FIG. 4 is intended for a large-scale product for business use, and the absorbing liquid is used for recovering the evaporator and the vapor refrigerant. The structure for spraying was a cause of increasing the size. Moreover, since the circulating water is used, the piping becomes complicated, and the manufacture and assembly cannot be performed easily.

When lithium bromide is used as the absorbing liquid, the temperature of the absorbing liquid in the absorber needs to be maintained at around 40 ° C. Therefore, it is usually necessary to cool the vapor refrigerant by using a cooling cylinder outside. There wasn't. Therefore, the equipment becomes large, and the piping and the like take a long distance and a lot of time and labor, which is disadvantageous to be adopted as an air conditioner such as an air conditioner for a home or a small-scale house. Further, since it is necessary to connect the indoor unit and the outdoor unit with a pipe for circulating the cooling / heating medium, the construction cost and the equipment cost are high.

In view of the above, according to the present invention, the equipment is reduced in size and simplification is achieved, the piping and the like are minimized, and the time and effort are minimized, and the manufacturing cost, construction cost, and equipment cost are low, and it is for household use. Another object is to provide an air conditioner suitable for small-scale homes.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is provided at a passage where air is vaporized by flowing a liquid refrigerant into an evaporation pipe portion and can be ventilated indoors or outdoors. An evaporator, an absorber capable of recovering the liquid refrigerant, and a regenerator capable of regenerating the absorbing liquid containing the refrigerant are provided, and the evaporation pipe portion is provided with a bent portion with respect to the absorption pipe portion. A means for injecting the absorption liquid from the regenerator on the side of the evaporation pipe with respect to the bent portion, and the injection portion is provided at a position where the absorption liquid to be injected flows down to the inner surface of the pipe. It was adopted.

[0012]

In the passage in which the evaporation pipe portion cooled by the heat of vaporization when the liquid refrigerant is dropped to evaporate the refrigerant is inclined with respect to the absorption pipe portion of the liquid refrigerant through the bent portion to allow indoor / outdoor ventilation. The installation space can be reduced by collectively installing the evaporator and the absorber. Then, the concentrated lithium bromide solution as the absorbing liquid flows down the inner surface of the pipe from the injection portion provided on the side of the evaporation pipe portion with respect to the bent portion, and absorbs the vapor refrigerant.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of one embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the same parts as those shown in FIG. 4 are designated by the same reference numerals, and the case of application as an air conditioner for both cooling and heating will be described. Reference numeral 1 denotes an evaporator. The evaporator 1 is provided at a joint portion between an intake passage 2 and an exhaust passage 3 which can ventilate the inside N and the outside N ', and a liquid refrigerant 5 is provided in an evaporation pipe portion 4A. Is dropped by the dropping mechanism unit 6 to evaporate the liquid refrigerant 5 in a vacuum state, and the inside of the chamber R is cooled by the heat of vaporization.

Reference numeral 7 is an absorber, and this absorber 7 is for collecting the liquid refrigerant 5 in the absorption pipe portion 4B.

As shown in FIG. 4, the dropping mechanism portion 6 is connected to the absorber 7 for concentrating the diluted lithium bromide solution Li 'which has absorbed the liquid refrigerant 5 into the concentrated lithium bromide solution Li again, and the burner 7 is used. A condenser 3 including a regenerator 31 including 30 and a cooling fan 33 connected to the regenerator 31 for cooling.
It is also possible to use a conventional circulating regeneration type apparatus consisting of 4 and in this case, the resource can be easily reused.

The evaporation pipe portion 4A is provided so as to be inclined with respect to the absorption pipe portion 4B via a bent portion 4C, and the evaporation pipe portion 4A and the absorption pipe portion 4B are one metallic pipe, preferably. Figure 1 shows copper pipe, stainless steel pipe, and aluminum pipe.
It is formed by bending it into a substantially V shape as shown in FIG. In this embodiment, the length L ₁ of the evaporation pipe portion 4A is preferably about 360 mm, and the length L ₂ of the absorption pipe portion 4B is preferably about 500 mm. The optimum bending angle θ of the evaporation tube portion 4A with respect to the absorption tube portion 4B is about 140 °.

A large number of fins 8, preferably about 320, are attached to the outer circumference of the evaporation pipe portion 4A at appropriate intervals, and the fins 8 preferably have a length of 3 pieces.
The length is about 2 mm, and in combination with the air blow from the air blower fan 9 provided in the outer peripheral direction of the evaporation pipe portion 4A, heat is efficiently radiated and the evaporation pipe portion 4A is cooled. At this time, the heat dissipation state can be adjusted by adjusting the length of the fins 8 and adjusting the vertical installation interval between the fins 8.

A large number of fins 8'are attached to the outer circumference of the absorption tube portion 4B, preferably about 360 sheets, at appropriate intervals, and the fins 8'are preferably about 32 mm in length. The heat is efficiently dissipated in combination with the air blown from the blower fan 9'provided in the outer peripheral direction of the absorption tube portion 4B to cool the absorption tube portion 4B.

Reference numeral 10 indicates the evaporation pipe portion 4 from the bent portion 4C.
It is an injection part for injecting a concentrated solution of lithium bromide Li from the regenerator 31 into the A side.
0 is the position where the injected lithium bromide concentrated solution Li flows down the inner surface of the bent portion 4C and the absorption tube portion 4B, preferably the position where the lithium bromide concentrated solution Li is dropped directly on the inner surface opposite to the tube. Although it is provided, of course, the injection part 10 may be provided at a position where the concentrated lithium bromide solution Li flows down to the inner surface of the evaporation tube portion 4A by providing the injection portion 10 on the side surface of the bent portion 4C.

Reference numeral 11 denotes a coil spring disposed below the injection portion 10 inside the tube on the side of the absorption tube portion 4B. The coil spring 11 has corrosion resistance and is easy to machine, for example, stainless steel material. The lithium bromide concentrated solution Li injected from the injection part 10 is agitated by the coil spring 11 and evenly flows down to every corner of the tube, and efficiently absorbs the liquid refrigerant. The diameter of the coil spring 11 is about 1 mm in this embodiment. Further, the refrigerant that has dropped into the evaporation pipe portion 4A of the evaporator 1 and evaporates flows down to the absorption pipe portion 4B through the bent portion 4C, but is agitated by the coil spring 11 and becomes familiar with the lithium bromide concentrated solution Li. It is absorbed and is flowed down into the lithium bromide storage tank 26.

Reference numeral 12 is a case provided at the joint between the intake passage 2 and the exhaust passage 3, and this case 1
The blower fan 9, the evaporator 1, and the cooling and
A heat exchanger 13 that also serves as a heating is accommodated, and an outlet 1 for discharging cool air or warm air to the upper one side to distribute it to each room.
2a is provided.

Reference numeral 13 is a heat exchanger for both cooling and heating,
The heat exchanger 13 is provided in the case 12 adjacent to the evaporator 1 and at a subsequent stage of the blower fan 9. The heat exchanger 13 is connected to the regenerator 31 by liquid refrigerant supply pipes 20a and 20b serving as an outward path and a return path, so that the liquid refrigerant (water vapor) is supplied and warm air is blown from the exhaust passage 3 into the room N. Used for heating.

Further, the heat exchanger 13 includes the liquid refrigerant supply pipe 2
Liquid refrigerant supply pipe 20c having a valve V branched from 0a
Liquid refrigerant 5 from the regenerator 31 via the liquid refrigerant supply pipe 20d and the liquid refrigerant supply pipe 20c, the condenser 34, the liquid refrigerant supply pipe 2
After passing through 0d and cooled by the blower fan 9 ', it is sent into the heat exchanger 13 for heat exchange. And cold air is blown out 12
It is used for cooling by blowing out from a to the room N.

An embodiment of the present invention has the above-mentioned structure,
First, when this device is used as an air conditioner for cooling, the liquid refrigerant (water vapor) generated by burning the burner 30 is branched to the liquid refrigerant supply pipe 20a, and the valve V is opened. Transfer from the supply pipe 20c to the condenser 34. After that, the liquid refrigerant 5 is dropped from the dropping mechanism portion 6 into the evaporation pipe portion 4A through the liquid refrigerant supply pipe 20d to evaporate the liquid refrigerant 5 inside the evaporation pipe portion 4A, and the evaporation heat of the evaporation heats the evaporation pipe portion 4A. Allow to cool.

A large number of fins 8 are provided on the outer peripheral portion of the evaporation pipe portion 4A to radiate heat, and the blower fan 9 cools the evaporation pipe portion 4A, so that cooling air around the evaporation pipe portion 4A is generated. Air outlet 12 provided on one side above case 12
The air is supplied from a to an indoor unit (not shown in the figure) to perform cooling.

When this device is used as a heater,
The valve V of the liquid refrigerant supply pipe 20c is closed, and the liquid refrigerant (water vapor) generated by burning the burner 30 in the regenerator 31 is sent from the liquid refrigerant supply pipe 20a to the heat exchanger 13.
By returning to the regenerator 31 via the liquid refrigerant supply pipe 20b again, heat is exchanged and warm air is blown by the blower fan 9 into the exhaust passage 3
To the room N to heat the room.

By the way, in the evaporator 1 and the absorber 7 of this embodiment, the evaporation pipe portion 4A is provided so as to be inclined with respect to the absorption pipe portion 4B through the bent portion 4C using one metal pipe. Since the installation space between the evaporator 1 and the absorber 7 is compact, and the evaporator 1 and the absorber 7 are integrated, the structure is simplified and the number of parts is reduced. Since it is less and easy to manufacture and assemble, it is suitable for use as a vapor refrigerant absorption device for a home air conditioner.

Further, since the injection portion 10 is provided on the side of the evaporation pipe portion 4A with respect to the bent portion 4C, the injection portion 1 is provided.
At 0, the concentrated lithium bromide solution Li as an absorbing liquid supplied from the regenerator 31 is directly injected and flows down to the opposite inner surface in the tube. Then, the concentrated lithium bromide solution Li flowing on the inner surface of the tube is spread on the inner surface of the tube and is agitated by the coil springs 11 located below the inner surface of the tube, so that the solution evenly spreads to every corner of the tube and the liquid refrigerant 5 evaporates. The vapor refrigerant A generated from the evaporation pipe portion 4A is efficiently absorbed. Therefore, the structure of the conventional absorber 7 ', such as a lithium bromide concentrated solution Li injection part as shown in FIG. Also, two points, the absorption tube portion 4B and the coil spring 11, are sufficient.

A fin 8'is provided on the outer circumference of the absorption tube portion 4B.
Is provided and a blower fan 9'is provided on the outer circumference of the absorption tube portion 4B, so that the lithium bromide concentrated solution Li is
However, the reaction heat generated when the vapor refrigerant A coming from the evaporation pipe portion 4A is efficiently absorbed in the absorption pipe portion 4B is cooled by the heat radiation from the fins 8'and the air blow from the blower fan 9 '.

By the way, the concentrated lithium bromide solution Li which has absorbed the vapor refrigerant A in the endothermic tube portion 4B becomes a diluted lithium bromide solution Li 'and is sent to the regenerator 31 as shown in FIGS. In the regenerator 31, the diluted lithium bromide solution Li 'is heated and concentrated by the burner 30, so that the concentrated lithium bromide solution Li as an absorbing liquid is injected again from the injection part 10 into the absorption tube part 4B. By adopting the circulation system, it is possible to reuse the resource without discarding it each time the absorbing liquid absorbs the liquid refrigerant.

Further, the vapor refrigerant A is sent to the condenser 34, cooled by the cooling fan 9 ', and then sent to the evaporator 1, and if it flows down from the dropping mechanism section 6 into the evaporator 1, the liquid refrigerant A is discharged. The refrigerant 5 can be reused and resources can be reused.

In the above embodiment, the heat exchanger 13 adjacent to the evaporator 1 provided in the intake passage 2 through which indoor air passes uses the heat exchanger 13 for both cooling and heating, and the valve V is used. Although it has been described as an air conditioner that can be used for both cooling and heating by switching, the heat exchanger 1
3 can also be used exclusively for the air conditioner.

In the above embodiment, the coil spring 11 is used.
Of the evaporation pipe portion 4A, which is inclined with respect to the absorption pipe portion 4B.
The lithium bromide concentrated solution Li as the absorbing liquid to be injected from the injection part 10 can be agitated by interposing it in the tube on the side of the evaporation tube part 4A from the bent part 4C between the coil spring 11 and Even if the pipe is not inserted in the pipe, the coil spring 11
It is needless to say that the absorption liquid injected from the injection portion 10 can be uniformly stirred by the spiral groove and the vapor refrigerant A can be efficiently absorbed also by forming the spiral groove instead of the above in the pipe.

In the above embodiment, the evaporation pipe portion 4A is formed integrally with the absorption pipe portion 4B via the bent portion 4C, but the invention is not limited to this, and the evaporation pipe portion 4A is formed separately.
The absorption tube portion 4B may be connected to the absorption tube portion 4B via a connecting component such as an elbow. Further, in the above description, the mechanism for spraying the absorbing liquid to recover the vapor refrigerant has been described as a domestic air conditioner and a combined cooling / heating machine, but it is also used as a domestic absorption type refrigerator. be able to.

[0035]

As described above, according to the present invention, the absorption pipe portion of the absorber is provided to be inclined with respect to the evaporation pipe portion of the evaporator provided in the passage through which the indoor air passes through the bent portion. Therefore, downsizing can be achieved without taking up the installation space, the vapor refrigerant can be recovered efficiently, and it is suitable for small household products. Moreover, since the structure can be simplified, piping can be facilitated, and the number of parts can be reduced, manufacturing and assembling can be facilitated, manufacturing cost can be reduced, and construction cost and facility cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is likewise an enlarged cross-sectional view of a main part.

FIG. 3 is an enlarged cross-sectional view which is also illustratively shown.

FIG. 4 is a cross-sectional view showing an example of a conventional vapor refrigerant absorption device for an air conditioner of this type.

FIG. 5 is a cross-sectional view showing an example of a conventional absorber for a home of this type or an absorption refrigerator having a capacity in the vicinity thereof.

[Explanation of symbols]

 1 Evaporator 2 Intake passage 3 Exhaust passage 4A Evaporation pipe part 4B Absorption pipe part 4C Bent part 5 Liquid refrigerant 6 Dropping mechanism part 7 Absorber 10 Injection part 11 Coil spring 12 Case 13 Heat exchanger 30 Burner 31 Regenerator 34 Condenser A vapor refrigerant Li concentrated lithium bromide solution N indoors N'outdoors

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location F25B 37/00 39/02 R F28F 1/24 (72) Inventor Toshiya Okano Naka-ku, Yokohama-shi, Kanagawa 4-94, Chiyosaki-cho (72) Hideki Tani, 4-1-2, Hirano-cho, Chuo-ku, Osaka City, Osaka Gas Co., Ltd. (72) Kazuya Imai 4-1-2, Hirano-cho, Chuo-ku, Osaka Gas Co., Ltd. (72) Inventor, Yuji Sano, 201 Shida, Nishi-Kashiwabara, Fuji City, Shizuoka Prefecture Takagi Industrial Co., Ltd.

Claims (5)

[Claims] 1. An evaporator provided in a passage through which the liquid refrigerant is evaporated by flowing down the liquid refrigerant in the evaporation pipe portion and which can be ventilated indoors and outdoors; and an absorber provided to collect the liquid refrigerant. And a regenerator that is capable of regenerating an absorbent containing a refrigerant, wherein the evaporation pipe portion is provided inclined with respect to the absorption pipe portion via a bent portion, and the evaporation pipe portion is closer to the evaporation pipe portion side than the bent portion. An air conditioner characterized by being provided with an injection portion for absorbing liquid from the regenerator, and the injection portion being provided at a position where the absorption liquid to be injected flows down to the inner surface of the pipe. 2. A coil spring capable of agitating the absorbing liquid injected from the injection part is provided in a pipe on the absorption pipe part side located below the injection part. Air conditioner. 3. The air according to claim 1, wherein a spiral groove in which the absorption liquid injected from the injection part can be agitated is provided in a pipe on the absorption pipe part side located below the injection part. Harmony device. 4. The evaporation pipe section is capable of blowing cold air or warm air into a room by switchingably supplying a liquid refrigerant generated by a condenser to a cooling supply passage and a heating supply passage. The air conditioner according to claim 1, wherein the air conditioner is provided as a heat exchanger for both eggplant cooling and heating. 5. The evaporation pipe section is provided as a heat exchanger for cooling, which is capable of blowing cool air into a room by being supplied with a liquid refrigerant generated in the condenser. Item 2. The air conditioner according to Item 1.