JP2003014258A - Absorption air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems with a conventional absorption air conditioner that the life of a cold/warm water pump drops and the time required for automatic water filling operation becomes long because the fluctuation of water level within a cistern is large and the cold/warm water pump repeats the operation and stoppage many times when the automatic water filling operation for filling cold/warm water in a vacant cold/warm water pipe is executed. SOLUTION: A controller is provided to continue the state of supplying water into the cistern 55, opening a cistern water supply valve 58 for a specified time (for five seconds), even if a high liquid level sensor 55a detects high water level. Thereupon, the time of cold/warm water pump 54 pressurizing and supplying cold/warm water into the cold /warm water pipe 53 during water supply increases. Hereby, the number of times of the water level within the cistern 55 dropping decreases, so the time required for automatic water filling operation can be shortened. Moreover, since the number of times of the water level of the cistern 55 dropping decreases, the number of times of the cold/warm water pump 54 repeats the operation and stoppage decreases, and the life of the cold/ warm water pump 54 elongates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type cooling / heating apparatus using an absorption type refrigeration cycle, and in particular, at the time of installation or maintenance, an empty circulation means is filled with water as a heating / cooling heat medium. Regarding automatic water filling function.

[0002]

2. Description of the Related Art In an absorption type cooling and heating apparatus, water (hereinafter, cold / hot water) as a heating / cooling heat medium cooled or heated by an outdoor unit is guided to an indoor unit by a circulation means (hereinafter, cold / hot water pipe),
Cool or heat the room with the indoor unit. The cold / hot water that has undergone heat exchange in the indoor unit is returned to the outdoor unit again by the cold / hot water pipe. The inside of the cold / hot water pipe is empty at the time of installing the absorption type heating / cooling device and after draining the cold / hot water from the cold / hot water pipe for maintenance or the like.

Therefore, conventionally, there has been a device equipped with an automatic water filling function for automatically filling cold / hot water into cold / hot water pipes. In the conventional automatic water filling function, an automatic water filling operation is performed by the following controller with the following operation. When the automatic water filling operation is started, water supply is started by the water supply means inside the cistern provided in the route of the hot and cold water piping. After the start, when the low level liquid level sensor provided in the cistern detects a low water level in the cistern, the heat medium circulation pump for cooling and heating (hereinafter, cold / hot water pump) provided in the cold / hot water pipe is operated. When the high level liquid level sensor provided in the cistern detects a high water level in the cistern, the water supply to the cistern is stopped.

After the water supply to the cistern is stopped, when the low level liquid level sensor detects that the water level in the cistern is lower than the low water level, the cold / hot water pump is operated to prevent the cold / hot water pump from idling. The water supply is stopped and the water supply is restarted inside the cistern. After that, the above operation is repeated, and when an appropriate time is reached (for example, when the low level liquid level sensor does not detect a low water level even after a predetermined time has passed), the automatic water filling operation is stopped.

[0005]

However, the volume of cold / hot water in the hot / cold water piping is relatively large. In particular, when a plurality of outdoor units are installed, or when the volume of the cistern is small due to restrictions inside the outdoor unit, the volume of cold / hot water in the hot / cold water pipe becomes very large compared to the volume of the cistern. Therefore, when the automatic water filling operation is performed, the cold / hot water pump repeats the operation and the stop many times.
By repeating this, there is a concern that the life of the cold / hot water pump may be shortened. In addition, as the number of repetitions increases, the time required for the automatic water filling operation becomes longer.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. An object of the present invention is to reduce the time required for automatic water filling operation and to reduce the number of repetitions of operation and stop of the cold / hot water pump in automatic water filling operation. It is to provide an absorption-type cooling and heating device that prevents the life of the hot and cold water pump from being shortened by reducing it.

[0007]

In order to achieve the above-mentioned object, the absorption type cooling and heating apparatus of the present invention employs the following technical means. [Means of Claim 1] An absorption type cooling and heating apparatus is an indoor unit that performs at least one of cooling and heating the inside of the room with an outdoor unit equipped with an absorption refrigeration cycle and water as a heat medium for cooling and heating supplied from the outdoor unit. An air conditioner and a circulating means for supplying a heating / cooling heat medium from the outdoor unit to the indoor unit, and a circulating means for returning the heating / cooling heat medium from the indoor unit to the outdoor unit, provided in the middle of the circulating means, and having a predetermined amount. A cistern that stores water, a water supply means that replenishes the inside of this cistern, and a controller that controls this water supply means,
Wherein the cistern comprises at least a high level liquid level sensor for detecting a high water level in the cistern, and the controller is supplied with water as a heating / cooling heat medium inside the circulation means. When there is no state, the circulating means is provided with an automatic water filling function for filling water as a heating / cooling heat medium, and this automatic water filling function is provided inside the systern by the water supplying means during the automatic water filling operation. It is provided to continue supplying water into the cistern by the water supply means for a predetermined time even when water is supplied and the high level liquid level sensor detects a high water level. It is characterized by that.

[Means for Claim 2] In the absorption type cooling and heating apparatus according to claim 1, the automatic water filling function is a state in which water is supplied to the inside of the system turn by the water supply means during an automatic water filling operation. After the level liquid level sensor detects a high water level, a state in which water is supplied to the inside of the cistern by the water supply means until a predetermined time or more has elapsed and until the high level liquid level sensor detects a high water level. It is characterized by being provided so as to continue.

[Means for Claim 3] In the absorption type cooling and heating apparatus according to claim 1 or 2, the cistern includes a low level liquid level sensor for detecting a low water level in the cistern, and the automatic water filling function is provided. , During automatic water filling operation,
While the low-level liquid level sensor is not detecting a low water level, the water supply means is provided to supply water into the cistern, and when the low-level liquid level sensor detects a low water level, The heat medium circulation pump for cooling and heating provided in the circulation means is operated.

[Means of claim 4] In the absorption type cooling and heating apparatus according to any one of claims 1 to 3, the automatic water filling function is a second operation after the high level liquid level sensor detects a high water level. The automatic water filling operation is stopped when a predetermined time elapses and a third predetermined time elapses after the valve opening instruction is given to the flow rate adjusting valve provided in the circulation means.

[0011]

[Operations and effects of the invention] [Operations and effects of claims 1 and 2] By adopting the means of claims 1 and 2, even if the high level liquid level sensor detects a high water level, water is supplied for a predetermined time or more. Since the means continues to supply water to the interior of the systern, the time during which the cooling / heating heat medium circulation pump pressurizes water as the cooling / heating heat medium inside the circulating means during the water supply increases. As a result, the number of times the water level of the cistern drops is reduced, so that the time required for the automatic water filling operation can be shortened. In addition, since the number of times the water level of the cistern drops decreases, the number of times the heating / cooling heat medium circulation pump repeats operation and stop during the automatic water filling operation decreases. This makes it possible to extend the life of the heat medium circulation pump for cooling and heating.

[Operation and Effect of Claim 3] When a decrease in the water level in the cistern is predicted by a timer or the like, in order to avoid a problem in which the cooling / heating heat medium circulation pump idles due to a prediction error, the cooling / heating heat medium is avoided. It is necessary to shorten the time to stop the circulation pump and restart the water supply. However, by adopting the means of claim 3, the decrease in the water level in the cistern can be detected more accurately than in the case where the decrease in the water level in the cistern is predicted by, for example, a timer. For this reason, the safety range for prediction can be reduced, the number of times the water level of the cistern drops can be reduced, the automatic filling time can be shortened, and the heat medium circulation pump for cooling and heating can be reduced. It is possible to extend the life of the.

[Operation and effect of claim 4] By adopting the means of claim 4, the automatic water filling operation is finished after it is ensured that the circulating means is filled with water as the heating and cooling medium. To do. That is, when the normal operation is started, the problem that the water level in the cistern drops and the operation is temporarily stopped can be eliminated.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described.
A description will be given based on one embodiment and a modification. [First Embodiment] FIGS. 1 to 4 show an embodiment.
[Fig. 3] is a schematic view of an outdoor unit in an absorption type cooling and heating device. FIG. 2 is a connection diagram of the outdoor unit and the indoor unit.

(Schematic Description of Absorption Air Conditioner) The absorption air conditioner comprises an outdoor unit 1 and an indoor unit 2. The outdoor unit 1 is composed of a refrigerator main body 3 and a cooling tower 4, and the indoor unit 2 is excluded. Each electric functional component is controlled by the controller 5. The refrigerator main body 3 is mainly made of stainless steel and forms an absorption cycle by using an aqueous solution of lithium bromide as a refrigerant and an absorbing liquid, and has a heating means 6 for heating the absorbing liquid and a double-effect absorption type. And a refrigeration cycle 7.

(Explanation of Heating Means 6) The heating means 6 of this embodiment uses a gas combustion device that combusts a gas which is a fuel to generate heat and heats the absorbing liquid by the generated heat. The heating means 6 is a gas burner 1 that burns gas.
1, a gas supply means 12 for supplying gas to the gas burner 11, a combustion fan 13 for supplying combustion air to the gas burner 11, and the like. The gas supply means 12 is
Gas pipe 12a, gas source solenoid valve 12b for opening and closing this gas pipe 12a, gas proportional valve 12 for adjusting the amount of gas fuel
It is composed of c. Then, the heat obtained by the gas combustion of the gas burner 11 heats the boiling device 14 of the absorption refrigeration cycle 7 so as to heat the low-concentration absorbing liquid (hereinafter, dilute liquid) supplied into the boiling device 14. It is provided.

(Explanation of Absorption Refrigeration Cycle 7) The absorption refrigeration cycle 7 is equipped with a boiling device 14 which is heated by the heating means 6, and the rare liquid supplied to the boiling device 14 is heated to dilute it. Utilizing the high temperature regenerator 15 that vaporizes (evaporates) the refrigerant (water) contained in the liquid into a medium-concentration absorption liquid (hereinafter, medium liquid) and the condensation heat of the vaporized refrigerant in the high temperature regenerator 15, The low temperature regenerator 16 that heats the medium liquid supplied from the high temperature regenerator 15 side by utilizing the pressure difference and vaporizes the refrigerant contained in the medium liquid to turn the medium liquid into a highly concentrated absorbing liquid (hereinafter, concentrated liquid) 16. And a condenser 17 for cooling and liquefying the vaporized refrigerant (steam) from the high temperature regenerator 15 and the low temperature regenerator 16,
An evaporator 18 for evaporating the liquefied refrigerant (water) liquefied by the condenser 17 under a pressure close to a vacuum, and an absorption for absorbing the vaporized refrigerant evaporated by the evaporator 18 into a concentrated liquid obtained by the low temperature regenerator 16. And a container 19.

(Description of High Temperature Regenerator 15) High Temperature Regenerator 15
Is the above-mentioned boiling device 1 for heating the dilute liquid by the heating means 6.
4, and a boiling cylinder 21 extending upward from the boiling device 14
Equipped with. The vaporized refrigerant that has boiled in the boiling device 14 and the boiling tube 21 and is vaporized from the dilute liquid is blown out from the boiling tube 21 into the high temperature regeneration case 22 having a cylindrical container shape. The high temperature vaporized refrigerant blown into the high temperature regeneration case 22 is deprived of heat by the wall of the high temperature regeneration case 22 as vaporization heat at the time of evaporation of the middle liquid in the low temperature regenerator 16 to be cooled to be a liquefied refrigerant (water). )become.

Inside the boiling cylinder 21 of this embodiment, there is arranged a container 21a for storing the medium liquid after the refrigerant is blown into the boiling cylinder 21 and the refrigerant is vaporized, and the medium liquid accumulated therein is stored in the container 21a. It is supplied to the low temperature regenerator 16 through the liquid pipe 23. The middle liquid pipe 23 is provided with a throttle means (not shown) such as an orifice. When the cooling / heating switching valve 52a, which will be described later, is closed, this throttling means causes the medium liquid to flow while maintaining the pressure difference between the high temperature regenerator 15 and the low temperature regenerator 16, and when the cooling / heating switching valve 52a is opened, the medium liquid is discharged. It is provided so that it hardly flows. The liquefied refrigerant (water) liquefied in the high temperature regeneration case 22 and separated on the outside of the boiling cylinder 21 is
It is guided to the condenser 17 through the liquid refrigerant pipe 25 connected to the lower part.

(Description of Low Temperature Regenerator 16) Low Temperature Regenerator 16
Is provided with a low temperature regeneration case 31 in the shape of a tubular container that covers the high temperature regeneration case 22. This low temperature regenerator 16 is a medium liquid pipe 2
The medium liquid supplied through the No. 3 is injected toward the ceiling portion of the high temperature regeneration case 22. Since the temperature in the low temperature regeneration case 31 is lower than the temperature in the high temperature regeneration case 22,
The pressure in the low temperature regeneration case 31 is lower than the pressure in the high temperature regeneration case 22. Therefore, the medium liquid supplied from the medium liquid pipe 23 into the low temperature regeneration case 31 is easily evaporated. Then, when the middle liquid is poured into the ceiling portion of the high temperature regeneration case 22, the middle liquid is heated by the wall of the high temperature regeneration case 22,
Part of the refrigerant contained in the medium liquid evaporates and becomes a vaporized refrigerant,
The rest becomes thick liquid.

Here, the upper side of the low temperature regeneration case 31 communicates with the upper side of the annular case-shaped condensing case 32 via a communicating portion 33. Therefore, the vaporized refrigerant evaporated in the low temperature regeneration case 31 passes through the communicating portion 33 and is condensed in the condensing case 3
2 is supplied. On the other hand, the concentrated liquid is the low temperature regeneration case 31.
And is supplied to the absorber 19 through the concentrated liquid pipe 34 connected to the lower portion of the low temperature regeneration case 31. In addition,
A ceiling plate 35 is provided on the upper side in the low temperature regeneration case 31, and a gap 36 through which vaporized refrigerant passes is provided between the outer peripheral end of the ceiling plate 35 and the low temperature regeneration case 31.

(Description of Condenser 17) The condenser 17 is covered with a condensing case 32 in the shape of an annular container. Inside the condensing case 32, a condensing heat exchanger 37 that cools and liquefies the vaporized refrigerant in the condensing case 32 is arranged. This condensing heat exchanger 37 is an annular coil,
Cooling water flows inside. Then, the liquefied refrigerant supplied from the low temperature regenerator 16 into the condensing case 32 is cooled and liquefied by the condensing heat exchanger 37. The liquefied refrigerant is received by the tray 37a, and the tray 37a receives the liquefied refrigerant.
Is guided to the evaporator 18 via the first liquid refrigerant supply pipe 38a.

On the other hand, below the condensing case 32, the refrigerant is supplied from the above-mentioned high temperature regenerator 15 through the liquid refrigerant pipe 25. When supplied to the condensing case 32, the supplied refrigerant reboils due to the difference in pressure (a low pressure of about 70 mmHg in the condensing case 32) and is supplied in a state where the vaporized refrigerant and the liquefied refrigerant are mixed. . The liquefied refrigerant stored in the lower portion of the condensing case 32 is passed through the second liquid refrigerant supply pipe 38c provided with the refrigerant valve 38b, which is an electromagnetic opening / closing valve, and then the evaporator 18 is supplied.
Be led to.

(Description of Evaporator 18) The evaporator 18 is provided under the condensing case 32 together with the absorber 19, and is an annular container-shaped evaporation / absorption case provided around the low temperature regeneration case 31. It is covered by 41. An evaporation heat exchanger 42 that evaporates the liquefied refrigerant supplied from the condenser 17 is arranged outside the evaporation / absorption case 41. This evaporation heat exchanger 42
Is an annular coil through which cold / hot water (water used as a heating / cooling heat medium) supplied to the indoor unit 2 flows.
Then, from the condenser 17 to the first and second liquid refrigerant supply pipes 38
The liquefied refrigerant supplied via a and 38c is supplied to the refrigerant spraying tool 43 via a refrigerant boiling device 43a arranged above the evaporation heat exchanger 42, and the refrigerant spraying tool 43 evaporates heat exchange. It is sprinkled on the container 42.

Since the inside of the evaporation / absorption case 41 is maintained in a substantially vacuum (for example, 6.5 mmHg), the boiling point is low, and the liquefied refrigerant dispersed in the heat exchanger 42 for evaporation is very easily evaporated. Then, the liquefied refrigerant sprayed on the evaporation heat exchanger 42 removes heat of vaporization from the cold and warm water flowing in the evaporation heat exchanger 42 to evaporate. As a result, the cold / hot water flowing through the evaporation heat exchanger 42 is cooled. Then, the cooled cold / hot water is guided to the indoor unit 2 to cool the room.

(Description of Absorber 19) The absorber 19 is covered with the evaporation / absorption case 41 as described above. And
The absorber 19 is provided inside the evaporation / absorption case 41,
An absorption heat exchanger 44 for cooling the concentrated liquid supplied from the concentrated liquid pipe 34 is arranged. This absorption heat exchanger 44 is
Cooling water that cools the concentrated liquid sprinkled on the coil flows inside the annular coil. In addition, the absorption heat exchanger 44
The cooling water that has passed through the condenser 17 is condensed by the heat exchanger 37 for condensation of the condenser 17.
After passing through, the cooling tower 4 is guided and cooled. And the cooling water cooled in the cooling tower 4 is
It is again guided to the absorption heat exchanger 44.

On the other hand, above the absorption heat exchanger 44, there is arranged an absorption liquid sprayer 45 for spraying the concentrated liquid supplied from the concentrated liquid pipe 34 to the absorption heat exchanger 44. The concentrated liquid sprinkled on the absorption heat exchanger 44 travels along the coil surface of the absorption heat exchanger 44 and falls from the upper side to the lower side, while removing the vaporized refrigerant generated by evaporation in the evaporation heat exchanger 42. Absorb. As a result, the absorbing liquid that has dropped to the bottom of the evaporation / absorption case 41 becomes a dilute liquid having a low concentration.

Inside the evaporation / absorption case 41, a cylindrical partition wall 46 is arranged between the evaporation heat exchanger 42 and the absorption heat exchanger 44. The cylindrical partition wall 46 communicates with the inside of the evaporation / absorption case 41 at the upper side, and the vaporized refrigerant generated in the evaporator 18 is connected to the cylindrical partition wall 46.
Is guided into the absorber 19 via the upper part of the.

A dilute liquid pipe 47 for supplying the dilute liquid at the bottom of the evaporation / absorption case 41 to the evaporator 14 is connected to the bottom of the evaporation / absorption case 41. The rare liquid pipe 47 is provided with a solution pump 48 for flowing the rare liquid from the inside of the evaporation / absorption case 41 in a substantially vacuum state toward the boiling device 14.

(Explanation of Other Components of Absorption Refrigeration Cycle 7) Reference numeral 51 shown in FIG.
A high temperature heat exchanger 51 for exchanging heat between the medium liquid flowing from the inside to the low temperature regenerator 16 and the dilute liquid flowing from the absorber 19 to the boiling device 14.
and a low temperature heat exchanger 51b for exchanging heat between the concentrated liquid flowing from the low temperature regenerator 16 to the absorber 19 and the dilute liquid flowing from the absorber 19 to the boiling device 14 are integrated. The high temperature heat exchanger 51a cools the medium liquid flowing from the boiling cylinder 21 to the low temperature regenerator 16 and conversely heats the dilute liquid flowing from the absorber 19 to the boiling device 14. Further, the low temperature heat exchanger 51b cools the concentrated liquid flowing from the low temperature regenerator 16 to the absorber 19, and conversely heats the dilute liquid flowing from the absorber 19 to the boiling device 14.

Further, the absorption refrigeration cycle 7 of this embodiment is provided with heating operation means for performing heating operation in addition to the cooling operation by the above-mentioned operation. The heating operation means evaporates and absorbs the high temperature absorbing liquid from the lower portion of the boiling cylinder 21.
It comprises a heating pipe 52 that leads to the lower part of the absorption case 41, and a cooling / heating switching valve 52a that opens and closes the heating pipe 52. The cooling / heating switching valve 52a is opened during heating operation to guide the high-temperature absorbing liquid into the evaporation / absorption case 41 and heat the cold / hot water flowing in the evaporation heat exchanger 42 of the evaporator 18.

(Explanation of Indoor Unit 2) The indoor unit 2 includes an evaporator 1
The hot and cold water that has flowed in the heat exchanger 42 for evaporation of 8 and is cooled or heated is forcibly exchanged with the room air to cool or heat the room. An indoor heat exchanger (not shown) for exchanging and an indoor fan (not shown) are provided. A terminal control circuit (not shown) is incorporated inside the indoor unit 2 to control the rotation speed of the indoor fan according to the difference between the indoor temperature and the set temperature, and to open the flow rate adjusting valve 60 described later. Degree control. Further, the terminal control circuit is connected to the controller 5 of the outdoor unit 1 via the signal line 2a and outputs a driving instruction or the like to the outdoor unit 1.

In the indoor heat exchanger of the indoor unit 2, cold / hot water that has flowed in the evaporation heat exchanger 42 and is cooled or heated is introduced to the indoor heat exchanger, and the heat exchanged by the indoor heat exchanger is performed. A cold / hot water pipe 53 (corresponding to a circulation means) for returning the cold / hot water after replacement to the heat exchanger 42 for evaporation again is connected. The cold / hot water pipe 53 is provided with a cold / hot water pump 54 for circulating cold / hot water.

In the middle of the cold / hot water pipe 53, a systern 55 for storing a predetermined amount of cold / hot water is provided. The systern 55 is a relatively small container arranged in a narrow space inside the outdoor unit 1. A water supply means 56 for supplying water to the interior of the systern 55 is connected. This water supply means 56 is a water supply pipe 5 connected to a water pipe.
7 and a cistern water supply valve 58 which is an electromagnetic on-off valve that opens and closes the water supply pipe 57. When the cisturn water supply valve 58 is opened, tap water is supplied into the cistern 55. In addition, when the liquid level rises above the predetermined water level (the water level higher than the high water level detected by the high level liquid level sensor 55a described later), the water that rises above the predetermined water level is transferred to the cooling tower 4 of the cooling tower 4. A cistern overflow pipe 59 leading to the inside is connected.

On the other hand, the cold / hot water pipe 53 is provided with a flow rate adjusting valve 60 for adjusting the flow rate of the cold / hot water flowing to the evaporation heat exchanger 42. When a plurality of indoor units 2 are provided, the flow rate adjusting valve 60 is provided for each indoor unit 2 so as to individually adjust the flow rate of the cold / hot water supplied to each indoor unit 2. The flow rate control valve 60 of this embodiment is a thermal valve in which, when a built-in heater is energized and heated, the built-in wax pellets receive heat to expand and the opening degree increases.

(Explanation of Cooling Tower 4) The cooling tower 4 causes the cooling water, which has passed through the absorber 19 and the condenser 17 and has been heated, to flow from the upper side to the lower side, and exchanges heat with the outside air to radiate heat. At the same time, the cooling water is cooled by partially evaporating the heat of vaporization while flowing.
A cooling water fan 61 for promoting evaporation and cooling of the cooling water is provided. A cooling water pipe 62 for circulating cooling water is connected to the cooling tower 4, and the cooling water is circulated by a cooling water pump 63.

(Explanation of non-condensable gas collecting means) On the other hand, inside the outdoor unit 1, non-condensable gas such as hydrogen generated by corrosion in the absorption refrigeration cycle 7 is collected outside the absorption refrigeration cycle 7. A non-condensable gas collecting means for storing is stored. This non-condensable gas collecting means is a bleeding means 70 for extracting the non-condensing gas of the absorption refrigeration cycle 7 to the outside,
A non-condensable gas tank 71 for storing the non-condensable gas extracted to the outside by the extraction means 70 is provided.

(Operation of Cooling Operation by Operation of Absorption Refrigeration Cycle 7) In the absorption refrigeration cycle 7, the heating means 6 heats the boiling device 14 to cause the high temperature regenerator 15 to extract the vaporized refrigerant from the dilute liquid. And low temperature regenerator 1
At 6, the concentrated solution is removed from the medium solution. The vaporized refrigerant taken out by the high-temperature regenerator 15 and the low-temperature regenerator 16 is condensed in the condenser 17 and liquefied, and then sprayed on the evaporation heat exchanger 42 of the evaporator 18, and the vaporized refrigerant inside the evaporation heat exchanger 42 is condensed. The heat of vaporization is taken from cold and warm water to evaporate. Therefore, the cold / hot water that has passed through the evaporation heat exchanger 42 and is cooled is supplied to the indoor heat exchanger of the indoor unit 2 to cool the room.

The vaporized refrigerant evaporated in the evaporator 18 passes above the cylindrical partition wall 46 and flows into the absorber 19.
On the other hand, in the absorber 19, the concentrated liquid taken out by the low-temperature regenerator 16 is scattered on the absorption heat exchanger 44, and the vaporized refrigerant flowing from the evaporator 18 is absorbed in this concentrated liquid. It should be noted that the absorption heat generated when the vaporized refrigerant is absorbed by the concentrated liquid is absorbed by the absorption heat exchanger 44 to prevent the absorption capacity from lowering. The concentrated liquid that has absorbed the vaporized refrigerant in the absorber 19 becomes a dilute liquid, is sucked by the solution pump 48, is returned to the boiling device 14 again, and the above cycle is repeated.

(Explanation of Automatic Water Filling Function for Automatically Filling Cold / Hot Water into the Empty Hot / Hot Water Pipe 53) The controller 5 for controlling the electric functional parts of the absorption type heating / cooling device has the cold / hot water inside the cold / hot water pipe 53. For supplying the cold / hot water to the inside of the hot / cold water pipe 53 automatically when the absorption / cooling / heating device is installed, or when the hot / cold water is once drained for maintenance or the like. An automatic water filling function is provided. Due to this automatic water filling function, the above-mentioned cis-turn 55 has a high-level liquid level sensor 55a for detecting a high-level liquid level inside the cis-turn 55 and a low-level liquid level sensor 55b for detecting a low-level liquid level. And are provided.

The automatic water filling function is activated by operating a switch (not shown, for example, a DIP switch) provided in the controller 5, and when the automatic water filling is instructed by the switch, the automatic water filling operation is started. It is provided in. The operation of the controller 5 when automatic water filling is instructed by the switch is shown in FIG.
And it demonstrates with reference to the flowchart of FIG. When automatic water filling is instructed by the switch (start),
It is determined whether or not the trial operation of all the indoor units 2 (all terminals) has not been completed (step S1). If the result of this determination is NO, the procedure moves to the next item, and if the result of determination is YES, the indoor unit 2 is switched for trial operation (step S2). Then, an instruction to open the flow rate adjusting valve 60 is given to the indoor unit 2 (step S3), and the flow rate adjusting valve 60 which is a thermal valve is opened (O).
N) (step S4).

Next, it is judged whether or not the low level liquid level sensor 55b has detected a low water level (step S5).
). If the result of this determination is NO, the cold / hot water pump 54 may idle, so the cold / hot water pump 54 is turned off (step S6), and the cistern water supply valve 58 is opened (ON).
Then, water is supplied into the systern 55 (step S7), and the process returns to step S5. If the decision result in the step S5 is YES, the cold / hot water pump 54 does not idle, so the cold / hot water pump 54 is turned on (low-speed operation at 160 Hz) to perform the systern 5
The water supplied in 5 is pressurized by the cold / hot water pump 54 and supplied into the cold / hot water pipe 53 (step S8).

Next, it is judged whether or not the high level liquid level sensor 55a has detected a high water level (step S9).
). If the result of this judgment is NO, the cistern water supply valve 5
The valve opening (ON) of No. 8 is maintained (step S10), and the process returns to step 9. If the decision result in the step S9 is YES, the cistern water supply valve 5 is operated a predetermined time (for example, 5 seconds) after the high level liquid level sensor 55a detects the high water level.
8 is closed (OFF) and water supply is stopped (step S1
1).

Next, it is judged whether or not the low level liquid level sensor 55b has detected a low water level (step S1).
2). If the result of this determination is NO, the cold / hot water pump 54 may idle, so the cold / hot water pump 54 is turned off (step S13), and the cistern water supply valve 58 is opened (ON).
Then, water is supplied into the systern 55 (step S14), and the process returns to step S5. If the decision result in the step S12 is YES, the second predetermined time (for example, 20 seconds) continues after the high-level liquid level sensor 55a detects the high water level last time, and the hot and cold water pipe 53 is provided. It is determined whether or not a third predetermined time (for example, 2 minutes) has elapsed since the valve opening instruction was given to the flow rate adjusting valve 60 (step S15).
If the determination result is NO, the process returns to step S15. If the determination result is YES, the indoor unit 2 is instructed to close the flow rate control valve 60 (step S16), and the flow rate control valve 60, which is a thermal valve, is closed. The valve is turned off (step S17), and the automatic water filling operation is ended (end).

[Effects of Embodiment] As described above, even if the high-level liquid level sensor 55a detects a high water level, the cis-turn water supply valve 58 is opened for a predetermined time (5 seconds) to open the cis-turn 55. Since the state of supplying water to the inside is continued, the time during which the cold / hot water pump 54 pressurizes and supplies cold / hot water to the inside of the cold / hot water pipe 53 during water supply increases. As a result, the number of times the water level of the systern 55 lowers is reduced, so that the time required for the automatic water filling operation can be shortened. Further, since the number of times the water level of the systern 55 lowers decreases, the number of times the cold / hot water pump 54 repeats operation and stop during the automatic water filling operation decreases. This makes it possible to extend the life of the cold / hot water pump 54.

Further, in this embodiment, since the lowering of the water level in the cistern 55 can be accurately detected by the low level liquid level sensor 55b, the comparison is made when the lowering of the water level in the cistern 55 is predicted by a timer or the like. As a result, the safe range for stopping the cold / hot water pump 54 can be reduced. This can reduce the number of times the water level of the systern 55 lowers, shorten the automatic filling time, and extend the life of the cold / hot water pump 54.

Further, in this embodiment, the automatic water filling operation can be terminated after it is ensured that the cold / hot water pipe 53 has been filled with the cold / hot water by the judgment of the above-mentioned step S15. As a result, when the normal operation is started, the water level in the cistern 55 is lowered and the operation is temporarily stopped.

[Second Embodiment] In the first embodiment, as shown in step S8, the high level liquid level sensor 55 is used.
An example is shown in which water is supplied to the inside of the cistern 55 until a predetermined time (5 seconds) elapses after the high water level is detected by a. However, in the second embodiment, after the high level liquid level sensor 55a detects the high water level, a predetermined time (for example, 5 seconds) elapses until the high level liquid level sensor 55a detects the high water level, Cistern 5
Water is supplied to the inside of No. 5. By providing in this way, the same effect as that of the first embodiment can be obtained.

[Modification] In the above embodiment, as an example of the indoor unit 2, the air conditioning indoor unit 2 having a heat exchanger and a fan.
However, other indoor units 2 such as floor heating may be connected to the outdoor unit 1. In the above embodiment, the double refrigeration type is shown as an example of the absorption refrigeration cycle 7, but the single refrigeration type may be used, or the multi-effect type with three or more layers may be used. Also,
When injecting the medium liquid into the low temperature regenerator 16, the low temperature regenerator 16
Although the example of injecting from above is shown, it may be injected from below.

A gas burner 11 is used as a heating source of the heating means 6.
However, an oil burner or an electric heater may be used, or exhaust heat of another device (for example, an internal combustion engine) may be used.
An example in which the condensing heat exchanger 37, the evaporating heat exchanger 42, and the absorbing heat exchanger 44 are provided in a coil shape is shown, but other types of heat exchangers such as a tube-and-fin or a laminated heat exchanger are shown. May be used. Although an aqueous lithium bromide solution is shown as an example of the absorbing liquid, other absorbing liquids such as ammonia as the refrigerant and an aqueous ammonia solution using water as the absorbing liquid may be used.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an outdoor unit in an absorption type cooling and heating apparatus.

FIG. 2 is a connection diagram of an outdoor unit and an indoor unit.

FIG. 3 is a flowchart showing operation control of automatic water filling operation.

FIG. 4 is a flowchart showing operation control of automatic water filling operation.

[Explanation of symbols]

1 outdoor unit 2 Indoor unit 5 controller 53 Cold / hot water piping (circulation means) 54 Hot and cold water pump (heat medium circulation pump for cooling and heating) 55 Cistan 55a High level liquid level sensor 55b Low level liquid level sensor 56 Water supply means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoya Maki             4-1-2 Hirano-cho, Chuo-ku, Osaka City, Osaka             Gas Co., Ltd. F-term (reference) 3L054 BF01 BF04 BF20                 3L060 AA08 CC19 DD01 EE33 EE34                 3L093 AA05 CC00 DD02 EE00 EE17                       GG04 HH19 JJ04 JJ06 KK01                       MM08

Claims (4)

[Claims] 1. An outdoor unit equipped with an absorption refrigeration cycle; an indoor unit that cools or heats the room with water as a heating / cooling heat medium supplied from the outdoor unit; A circulation means for supplying the heating / cooling heat medium to the indoor unit and returning the cooling / heating heat medium from the indoor unit to the outdoor unit; a cistern provided in the middle of the circulation means for storing a predetermined amount of water; An absorption type cooling and heating apparatus comprising a water supply means for replenishing water to the inside of, and a controller for controlling the water supply means, wherein the cistern includes at least a high-level liquid level sensor for detecting a high water level in the cistern. The controller, when the water as the heating and cooling medium is not supplied to the inside of the circulation unit, the controller is provided inside the circulation unit. An automatic water filling function is provided for filling water as a heat medium for cooling and heating, and this automatic water filling function is a state in which water is supplied to the inside of the cistern by the water supply means during the automatic water filling operation and the high level. An absorption type cooling and heating apparatus, characterized in that, even if a liquid level sensor detects a high water level, it is provided so as to continue supplying water into the systern by the water supply means for a predetermined time. 2. The absorption type cooling and heating apparatus according to claim 1, wherein the automatic water filling function is a state in which water is supplied to the inside of the cistern by the water supply means during an automatic water filling operation, and the high level liquid level sensor is Provided to continue supplying water into the systern by the water supply means after a high water level is detected for a predetermined time or more and until the high level liquid level sensor detects the high water level. Absorption type air conditioner that is characterized. 3. The absorption type cooling and heating apparatus according to claim 1 or 2, wherein the cistern includes a low level liquid level sensor for detecting a low water level in the cistern, and the automatic water filling function is used during an automatic water filling operation. In a state where the low level liquid level sensor does not detect a low water level, the water supply means is provided to supply water into the cistern, and when the low level liquid level sensor detects a low water level, An absorption type cooling and heating apparatus, wherein a heat medium circulation pump for cooling and heating provided in the circulation means is operated. 4. The absorption type cooling and heating apparatus according to any one of claims 1 to 3, wherein the automatic water filling function has a second predetermined time after the high level liquid level sensor detects a high water level. The automatic water filling operation is stopped when a third predetermined time elapses after a valve opening instruction is given to the flow rate adjusting valve provided in the circulation means.