JP2001263850A - Absorption cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a high performance absorption cooler having a simple structure and exhibiting excellent assembling performance in which a large capacity can be generated instantaneously. SOLUTION: Since an absorption cooler comprising a heating means 1 and an absorption heat exchanger 3 is further provided with an absorption regenerator 24 storing mixture solution of absorption liquid and refrigerant and a condenser 6, a large capacity can be generated through a simple structure by supplying refrigerant generated from the absorption regenerator 24 and stored in the condenser 6 instantaneously. Furthermore, an absorption cooler having reduced number of components and piping joints and exhibiting excellent assembling performance can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption cooling device mounted on an air conditioner, a refrigerator and the like.

[0002]

2. Description of the Related Art Conventionally, this type of absorption cooling device has the structure shown in FIG. That is, a regenerator 2 having a heating means 1, an absorber 4 having an absorption heat exchanger 3, a condenser 6 having a condensation heat exchanger 5, an evaporator 7, and a regenerator 2.
High-temperature gas pipe 8 connecting the condenser 6 and the condenser 6, a liquid pipe 9 connecting the condenser 6 and the evaporator 7, the evaporator 7 and the absorber 4
Low-temperature gas pipe 10 for connecting the gas, the absorber 4 and the regenerator 2
, A solution pipe 12 connecting the regenerator 2 and the absorber 4, and a first throttle means 13 provided in the liquid pipe 9.
The second throttle means 14 provided in the solution pipe 12 and the regeneration pipe 1
1, a radiator 16, a fan 17, and a circulating pump 18 are connected to the absorption heat exchanger 3, and a radiator 20 is connected to the condensation heat exchanger 5.
And a heat radiating means 23 comprising a fan 21 and a circulation pump 22 are connected. The inside of the regenerator 2 is filled with a mixed solution of an absorbing liquid such as water and a refrigerant such as ammonia.

When the regenerator 2 is heated by the heating means 1,
The refrigerant evaporates and is sent out to the condenser 6, and the condensing heat exchanger 5
The liquid is liquefied by operating the heat radiating means 23, and is evaporated by the evaporator 7 to obtain cooling heat. Heating means 1
For example, an electric heater or a combustor can be used. Further, as the evaporator 7, those having a radiation fin and those having a blower fan are known. At this time, the mixed solution in which the concentration of the refrigerant has become low in the regenerator 2 is sent from the solution pipe 12 to the absorber 4 and absorbs the low-temperature gas sent from the low-temperature gas pipe 10, and accumulates inside the absorber 4. Was returned to the regenerator 2 by the solution pump 15 and heated, whereby an absorption cycle was established.

[0004]

However, the conventional absorption type cooling apparatus has a problem that the number of refrigerant circuit components is large, the circuit configuration is complicated, the apparatus is large, and the piping is complicated.

Further, a heat radiating means for radiating each of the heat of condensation and the heat of absorption is required, so that there is a problem that the structure is complicated and the device becomes large.

Furthermore, there is another problem that the efficiency of energy is low to radiate a large amount of condensation heat and absorption heat to the outside air or the like, and the noise is high because the cooling fan is rotated at high speed for heat radiation.

Further, in order to increase the cooling capacity, it is necessary to increase the size of each heat exchanger. However, in particular, there is a problem that the absorber for absorbing gas into the solution becomes large and the whole apparatus becomes large. I was

Further, in an apparatus or the like using ammonia and water filled therein, a regenerator for heating a solution at a high temperature has a high temperature and high alkali environment, and has a problem that corrosion occurs on the surface of a heating section.

Furthermore, both the absorber and the regenerator require three or more connection pipes, and at the same time, the regenerator also requires a heating unit, so that there is a problem that the assembling structure is complicated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which a regenerator and an absorber are integrally formed, thereby simplifying the circuit configuration of the cooling device, and miniaturizing the device and facilitating assembly. The purpose is to:

[0011]

In order to solve the above-mentioned problems, an absorption cooling device of the present invention comprises an absorption regenerator, a condenser,
By providing a fluid control means in a conduit connecting each of the evaporators to control the circulation of the refrigerant and to control the heat radiation in the absorption regenerator and the condenser, cooling heat is obtained with a simple configuration. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is an absorption regenerator having a heating means and an absorption heat exchanger for storing a mixed solution of an absorbing liquid and a refrigerant, and an absorption regenerator for the absorption heat exchanger. A first heat radiating means for radiating heat, a condenser having a condensation heat exchanger and storing a liquid refrigerant, a second heat radiating means for radiating heat of condensation of the condensation heat exchanger, an evaporator, and the absorption regeneration A first fluid control means provided on a conduit connecting a condenser and the condenser, a second fluid control means provided on a conduit connecting the condenser and the evaporator, and the evaporator. By providing a third fluid control means provided on a conduit connecting to the absorption regenerator, components for regenerating and absorbing the refrigerant are integrated, thereby simplifying the configuration and miniaturizing the apparatus. Becomes

According to a second aspect of the present invention, there is provided an absorption regenerator having a heating means and an absorption heat exchanger for storing a mixed solution of an absorbing liquid and a refrigerant, and a condensing apparatus having a condensation heat exchanger and storing a liquid refrigerant. A third heat radiating means for radiating the heat of absorption of the absorption heat exchanger and the heat of condensation of the condensation heat exchanger; and a third heat radiating means for disposing one of the absorption heat exchanger and the condensation heat exchanger. A first fluid control means provided on a conduit connecting the absorption regenerator and the condenser; and a conduit connecting the condenser and the evaporator. And a third fluid control means provided on a conduit connecting the evaporator and the absorption regenerator, so that heat release and coagulation heat of the absorption heat exchanger are provided. The heat is radiated from the exchanger by one heat radiating means, and the number of heat radiating means is reduced. It becomes to reduce the size of the device with simply.

[0014] The invention described in claim 3 is particularly advantageous in claim 2.
The third heat dissipating means described in 1 above, the third heat dissipating means comprises a water storage tank and a water pump for pumping up the liquid in the water storage tank, so that heat is released without rotating the fan, and the noise of the apparatus is reduced. Is gradually reduced.

The invention described in claim 4 is to simplify the control by the fluid control means by providing at least one of the first fluid control means and the third fluid control means with a check valve. Become.

According to a fifth aspect of the present invention, in particular, at a connection portion between the absorption regenerator and a conduit connecting the evaporator and the absorption regenerator, the conduit communicates with the mixed solution stored in the absorption regenerator. With this configuration, the refrigerant gas from the evaporator is directly fed into the mixed solution to increase the absorption efficiency, increase the cooling capacity, and reduce the size of the absorption regenerator.

According to a sixth aspect of the present invention, the absorption regenerator is filled with an absorption-promoting material, so that when the refrigerant gas is absorbed, the contact between the absorbing liquid and the refrigerant gas is promoted and the absorption is promoted. In addition to improved performance, the absorption promoter plays the role of a heat transfer fin during regeneration, increasing the heating capacity, enabling the absorption and regeneration performance to be improved simultaneously with the same configuration, increasing the cooling capacity and absorbing The size of the regenerator is reduced.

[0018] The invention according to claim 7 is to prevent corrosion from occurring on the surface of the heating section by forming a corrosion-resistant coating on at least the surface of the heating section inside the absorption regenerator, Heating can be performed at a high temperature at the time of regeneration, and the reliability is improved with high efficiency.

In the invention according to claim 8, the heating means is arranged at the bottom of the absorption regenerator, and a conduit connecting the evaporator and the absorption regenerator is piped from the top of the absorption regenerator and opened at the bottom. During regeneration, convection is generated inside by heating from the bottom during regeneration, and heating is promoted.At the time of absorption, the refrigerant comes out from the bottom end of the pipe as a foamy gas. By stirring the mixed solution inside, the absorption performance is improved, and both the absorption performance and the regeneration performance can be simultaneously improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIG. 1 is a configuration diagram of an absorption cooling apparatus according to a first embodiment of the present invention. In FIG. 1, the absorption regenerator 24 includes a heating means 1 and an absorption heat exchanger 3. The heating means 1 can be realized by an electric heater or a combustor. The condenser 6 includes the condensing heat exchanger 5. The absorption regenerator 24 and the condenser 6 are connected to a conduit 25.
Is connected by piping. The evaporator 7 includes the condenser 6 and the conduit 26
And connected by an absorption regenerator 24 and a conduit 27. The conduit 25 is provided with an on-off valve 28 as first fluid control means. The conduit 26 is provided with an on-off valve 29 as a second fluid control means. If necessary, a capillary tube 30 may be provided to add a throttling function, but may be integrated with the on-off valve 29. Of course, the means for realizing the aperture function is not limited to the capillary tube. The conduit 27 is provided with an on-off valve 31 as third fluid control means. To the absorption heat exchanger 3, a radiator 19 composed of a radiator 16, a fan 17, and a circulation pump 18 is connected. The condenser heat exchanger 5 is connected to a radiator 23 composed of a radiator 20, a fan 21, and a circulation pump 22. The absorption regenerator 24 stores a mixed solution of water as an absorption liquid and ammonia as a refrigerant. The heat radiating means 19 and the heat radiating means 23 are filled with a liquid such as water.

Hereinafter, the operation of this embodiment will be described.
First, when the mixed solution of the absorbing liquid and the refrigerant in the absorption regenerator 24 is heated by the heating means 1 with the on-off valve 29 and the on-off valve 31 closed and the on-off valve 28 opened, the refrigerant evaporates and the conduit 2
5 enters the condenser 6. At this time, by operating the circulating pump 22 to operate the heat radiating means 23, the high-temperature refrigerant gas in the condenser 6 is cooled by the condensation heat exchanger 5, and is liquefied and accumulated inside the condenser 6. Next, the circulation pump 22 is stopped with the heating of the heating means 1 stopped,
When the circulating pump 18 is operated to operate the heat radiating means 19, the pressure of the mixed solution in which the concentration of the refrigerant in the absorption regenerator 22 is reduced becomes low because the temperature becomes low. Next, on-off valve 2
When the valve 8 is closed and the on-off valves 29 and 31 are opened, the refrigerant in the condenser 6 is depressurized by the capillary tube 30 and enters the evaporator 7 to evaporate, whereby cold heat can be obtained in the evaporator 7. Using this cold heat, functions such as cooling, refrigeration, and dehumidification can be obtained. Further, the refrigerant gas evaporated in the evaporator 7 passes through the conduit 27 and passes through the absorption regenerator 22.
Enters and is absorbed by the absorbent. The absorption heat generated at this time is absorbed by the absorption heat exchanger 3 and is radiated to the outside by the radiation means 19. When the necessary cooling is completed or the refrigerant in the condenser 6 runs out, the operation returns to the first operation and the operation for storing the refrigerant in the condenser 6 is performed.

As described above, in the present embodiment, since the absorption regenerator 24 can integrally absorb and regenerate the refrigerant, the overall configuration is simplified, which contributes to downsizing of the apparatus.

(Embodiment 2) FIG. 2 is a configuration diagram of an absorption cooling device in a second embodiment of the present invention. In FIG. 2, one end of each of the absorption heat exchanger 3 and the condensation heat exchanger 5 is connected to the end of a pipe connecting the radiator 32, the fan 33, and the third radiating means 35 including the circulating pump 34. 3 and the other end is connected to a third heat radiation means 35 via a three-way valve 36 which is a flow path control means. At the time of the regeneration operation, the three-way valve 36 is switched to communicate with the condensing heat exchanger 5, and the circulating pump 34 is operated to operate the third radiating means 35. The heat flows into the heat exchanger 5 and is radiated by the radiator 32 to flow again into the condensation heat exchanger 5. On the other hand, in the absorption operation, if the three-way valve 36 is switched so as to communicate with the absorption heat exchanger 3 side, the water inside flows into the absorption heat exchanger 3 and receives heat, then radiates heat in the radiator 32 and absorbs heat again. Return to vessel 3. Three-way valve 36
Is switched between the regeneration operation and the absorption operation, so that only the third heat radiating means 35 can radiate the heat of absorption and the heat of condensation. Therefore, the number of heat radiating means can be reduced,
The configuration can be simplified and the size of the device can be reduced.

If necessary, the check valve 37 and the check valve 3
8, the absorption heat exchanger 3 and the condensation heat exchanger 5
May be provided on a conduit connected to the heat radiating means 35. Thus, during the regeneration operation, the check valve 37 prevents water from flowing into the absorption heat exchanger 3, and during the absorption operation, the check valve 38 prevents water from flowing into the condensation heat exchanger 5.

In this embodiment, the three-way valve 36 is used as the flow path control means. However, it is clear that this does not limit the present invention. For example, the flow path can be switched by providing an on-off valve (not shown) in a conduit communicating with the absorption heat exchanger 3 and the condensation heat exchanger 5.

(Embodiment 3) FIG. 3 is a block diagram of an absorption type cooling apparatus according to a third embodiment of the present invention. In FIG. 3, the third heat radiating means 35 includes a water tank 39 and a pump 40.
It is composed of And the pump 40 is the water tank 3
9 is connected to a three-way valve 36 configured to pump up water and communicate with one of the absorption heat exchanger 3 and the condensation heat exchanger 5. The ends of the absorption heat exchanger 3 and the condensation heat exchanger 5 that are not connected to the three-way valve 36 are connected by piping so as to be opened at the upper part of the water storage tank 39.

In the above configuration, when the three-way valve 36 is switched to the condensing heat exchanger 5 and the pump 40 is operated during the regeneration operation, the water in the water storage tank 39 is pumped up by the pump 40 and condensed by the condensing heat exchanger 5. After receiving the heat,
It flows into the water storage tank 39. On the other hand, during absorption operation, the three-way valve 3
6 is switched to communicate with the absorption heat exchanger 3, the water in the water storage tank 39 is pumped up by the pump 40 and receives the absorption heat in the absorption heat exchanger 3.
Flow into 9. Three-way valve 36 according to regeneration operation and absorption operation
, The heat of condensation and the heat of absorption can be collected and stored in the water tank 39.

According to this embodiment, heat can be dissipated without rotating the fan, and the noise of the apparatus can be reduced gradually.
Further, the water stored in the water storage tank 39 may be used for hot water supply.

(Embodiment 4) FIG. 4 is a configuration diagram of an absorption cooling device according to a fourth embodiment of the present invention. In FIG. 4, a check valve 41 is provided on a conduit 25 and
7 is provided with a check valve 42. Embodiment 2 is different from Embodiment 1 in that the on-off valve 28 is replaced by a check valve 41 and the on-off valve 29 is replaced by a check valve 42.

In the above configuration, at the time of reproduction, the absorption regenerator 2
Since the pressure in condenser 4 is higher than the pressure in condenser 6 and evaporator 7, when on-off valve 29 is closed, the refrigerant gas flows to condenser 6 through check valve 41 of conduit 25, while conduit 27
Is provided with a check valve 42 so that the flow into the evaporator 7 is prevented. When the on-off valve 29 is opened, the refrigerant in the condenser 6 enters the evaporator 7, evaporates and flows into the absorption regenerator 24 when the on-off valve 29 is opened. The stop valve 41 serves to prevent the refrigerant in the condenser 6 from flowing through the conduit 25 and into the absorption regenerator 24.

As described above, according to the present embodiment, the fluid control can be simplified as compared with the case where the on-off valve is used. In this embodiment, two check valves are used, but it goes without saying that only one of the check valves may be used.

(Embodiment 5) At a connecting portion 43 between the conduit 27 and the absorption regenerator 24 shown in FIG.
It is in communication with the absorbent stored in 4. The refrigerant gas evaporated in the evaporator 7 is foamed and absorbed in the mixed solution in the absorption regenerator 24.

In this embodiment, as compared with the case where the connection is made without communication with the mixed solution, there is an effect that the absorption efficiency is improved because the mixed solution is directly touched. It is desirable that the connecting portion 43 be provided at the bottom of the absorption regenerator 24 in consideration of rising of air bubbles.

(Embodiment 6) FIG. 5 is a configuration diagram of an absorption cooling device in a sixth embodiment of the present invention. In FIG. 5, an absorption promoting material 44 in the form of, for example, a spring is added to the inside of the absorption regenerator 24. During the absorption operation, the foamed refrigerant gas flowing from the conduit 27 collides with the absorption promoting material 44. The absorption performance is remarkably improved due to a sharp increase in the contact area with the absorbing liquid as fine gas particles. On the other hand, at the time of the regeneration operation, the absorption promoting material 44 acts as a heat transfer fin, so that the heat generated by the heating means 1 can be efficiently transmitted to the absorbing liquid, thereby increasing the amount of generated refrigerant and improving the performance. As the absorption promoter 44, for example, a stainless steel material or a fluororesin material can be used.

(Embodiment 7) FIG. 6 is a block diagram of an absorption cooling device according to a seventh embodiment of the present invention. In FIG. 7, a corrosion-resistant film 45 is a film having a component of, for example, chromium or titanium formed on the inner surface of the absorption regenerator 24 in contact with the heating means 1 by vapor deposition or the like. During regeneration operation, the higher the temperature of the mixed solution, the higher the amount of refrigerant generated, but on the other hand, the environment becomes extremely corrosive at high temperatures and high alkalinity using ammonia or the like as a refrigerant, and corrosion occurs. There is fear. Heating means 1 that is particularly hot
, The corrosion can be prevented at a lower cost than when it is formed on the entire inner surface of the absorption regenerator 24.

(Embodiment 8) FIG. 7 is a block diagram of an absorption cooling device in an eighth embodiment of the present invention. In FIG. 7, the heating means 1 is provided at the bottom of the absorption regenerator 24. Further, the conduit 27 is connected to and inserted into the upper part of the absorption regenerator 24, and the end thereof is opened near the bottom of the absorption regenerator 24.

In the above configuration, during the regeneration operation, by heating with the heating means 1 provided at the bottom, convection is generated in the mixed solution inside and the heating is promoted. Goes up. On the other hand, at the time of the absorption operation, the end of the conduit 27 is opened at the bottom of the absorption regenerator 24, so that the inflowing refrigerant rises as bubbles and vigorously agitates the mixed solution to improve the absorption performance. Further, since the position of the heating means 1 and the conduit 27 are far apart, an apparatus excellent in assemblability can be realized.

[0039]

As described above, according to the first, second or fourth aspect of the present invention, a compact cooling device can be realized.

Further, according to the third aspect of the present invention, it is possible to reduce the noise of the apparatus.

Further, according to the fifth, sixth or eighth aspect, the cooling efficiency can be improved.

Further, according to the present invention, corrosion inside the absorption regenerator can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an absorption-type cooling device according to first and fifth embodiments of the present invention.

FIG. 2 is a configuration diagram of an absorption cooling device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of an absorption cooling device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an absorption cooling device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of an absorption cooling device according to a sixth embodiment of the present invention.

FIG. 6 is a configuration diagram of an absorption cooling device according to a seventh embodiment of the present invention.

FIG. 7 is a configuration diagram of an absorption cooling device according to an eighth embodiment of the present invention.

FIG. 8 is a configuration diagram of a conventional absorption cooling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating means 3 Absorption heat exchanger 5 Condensing heat exchanger 6 Condenser 7 Evaporator 19 1st heat radiating means 23 2nd heat radiating means 24 Absorption regenerator 25,26,27 Pipe 28 Open / close valve (1st fluid control Means) 29 On-off valve (second fluid control means) 31 On-off valve (third fluid control means) 35 Third radiating means 36 Three-way valve (flow path control means) 39 Water tank 40 Pumping pump 41, 42 Check Valve 43 Connection part 44 Absorption promoter 45 Corrosion resistant coating

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 37/00 F25B 37/00

Claims (8)

[Claims] 1. An absorption regenerator having a heating means and an absorption heat exchanger for storing a mixed solution of an absorption liquid and a refrigerant, a first heat radiation means for radiating heat absorbed by the absorption heat exchanger, and a heat of condensation A condenser having an exchanger for storing the liquid refrigerant, a second radiator for radiating heat of condensation of the condensation heat exchanger, and an evaporator;
A first fluid control means provided on a conduit connecting the absorption regenerator and the condenser, a second fluid control means provided on a conduit connecting the condenser and the evaporator, A third provided on a conduit connecting the evaporator and the absorption regenerator;
Absorption cooling device comprising a fluid control means. 2. An absorption regenerator having a heating means and an absorption heat exchanger for storing a mixed solution of an absorption liquid and a refrigerant; a condenser having a condensation heat exchanger and storing a liquid refrigerant; Third heat radiation means for radiating heat absorbed by the heat exchanger and condensation heat of the condensation heat exchanger, and flow path control means for communicating one of the absorption heat exchanger and the condensation heat exchanger to the third heat radiation means. An evaporator, first fluid control means provided on a conduit connecting the absorption regenerator and the condenser, and a second fluid control means provided on a conduit connecting the condenser and the evaporator. An absorption cooling device comprising: a fluid control means; and a third fluid control means provided on a conduit connecting the evaporator and the absorption regenerator. 3. The absorption cooling device according to claim 2, wherein the third heat radiating means comprises a water storage tank and a water pump for pumping liquid in the water storage tank. 4. The absorption cooling device according to claim 1, wherein at least one of the first fluid control means and the third fluid control means is a check valve. 5. A connecting part between a conduit connecting an evaporator and an absorption regenerator and the absorption regenerator, wherein the conduit communicates with a mixed solution stored in the absorption regenerator.
5. The absorption cooling device according to any one of claims 1 to 4. 6. The absorption cooling device according to claim 1, wherein the absorption regenerator is filled with an absorption promoting material. 7. The absorption type cooling apparatus according to claim 1, wherein a corrosion resistant film is formed on a heating means mounting surface inside the absorption regenerator. 8. The absorption regenerator according to claim 1, wherein the heating means is arranged at the bottom of the absorption regenerator and a conduit connecting the evaporator and the absorption regenerator is piped from the upper part of the absorption regenerator and opened at the bottom. An absorption cooling device according to any one of the preceding claims.