JP2846582B2 - Absorption air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption air conditioner capable of performing indoor air conditioning by an absorption refrigeration cycle.

[0002]

2. Description of the Related Art The basic structure of an absorption refrigeration cycle is as follows.
A regenerator that heats the absorbing liquid and vaporizes a part of the absorbing liquid,
A condenser that cools and liquefies the vaporized refrigerant generated in the regenerator, an evaporator that evaporates the liquefied refrigerant liquefied by the condenser under low pressure, and absorbs the vaporized refrigerant evaporated by the evaporator into an absorbing liquid. The absorbing liquid, which includes an absorber and absorbs the vaporized refrigerant by the absorber, is sent to a regenerator by a solution pump. When the refrigerant evaporates in the evaporator, latent heat is taken from a heat medium (water or the like) sent from the evaporator to the indoor heat exchanger via the heat medium circuit. The heat medium that has been deprived of heat and cooled is sent to the indoor heat exchanger and exchanges heat with the indoor air to cool the room. The heat medium that has exchanged heat with the indoor air in the indoor heat exchanger is again guided to the evaporator via the heat medium circuit.

[0003] When an absorption type air conditioner using this absorption type refrigeration cycle is installed for the first time,
The evaporator and the indoor heat exchanger are connected by a heat medium circuit including a heat medium pump. Thereafter, it is necessary to perform an air bleeding operation (a heat medium filling operation) for filling the evaporator, the indoor heat exchanger, and the heat medium circuit with the heat medium and bleeding air contained therein.
On the other hand, the heat medium circuit includes a cistern for storing the heat medium therein. In the air bleeding operation, the operator manually supplies the heat medium into the cistern, and then manually operates the heat medium pump. Then, the air in the heat medium circuit escapes, and the liquid level of the heat medium in the cistern drops. Then, the operator again supplies the heating medium manually into the cistern and repeats the above operation. If the liquid level of the heat medium in the cistern does not drop even after the heat medium pump is operated for a predetermined time, it is determined that the internal air has completely escaped, and the air bleeding operation is completed.

[0004]

The bleeding operation requires a very long time (depending on the installation conditions, for example, about 30 minutes). For this reason, if the work of bleeding air is performed manually, the installer needs to constantly supply and stop the heat medium and operate the heat medium pump during the bleeding work. Is a heavy burden on workers.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorption type air conditioner which can easily bleed a heat medium circuit during installation.

[0006]

Means for Solving the Problems The absorption type air conditioner of the present invention employs the following technical means to achieve the above object. [Means of claim 1] Absorption type air conditioner comprises: a) heating means for heating the absorption liquid; and b) a regenerator for heating the absorption liquid with the heating means to vaporize a part of the absorption liquid. A condenser that cools and liquefies the vaporized refrigerant generated in the condenser, an evaporator that evaporates the liquefied refrigerant liquefied by the condenser under low pressure, and an absorber that absorbs the vaporized refrigerant evaporated by the evaporator into an absorbent. C) an indoor heat exchanger installed in the room to exchange heat between indoor air and a heat medium; and d) cooling by removing latent heat of evaporation when the liquefied refrigerant evaporates in the evaporator. A heating medium circuit that guides the heat medium that has been heat-exchanged with the indoor air to the indoor heat exchanger and guides the heat medium that has been heat-exchanged with the room air to the evaporator again; Heat medium pump to circulate heat medium f) a cistern provided in the heat medium circuit and storing a heat medium; g) a heat medium supply means for supplying a heat medium to the cis turn; h) a heat medium provided to the heat medium supply means and supplying heat to the cis turn A heat medium valve for supplying and stopping of the heat medium; i) a cis-turn high level sensor for detecting whether the cis-turn is filled with a predetermined amount of heat medium; and j) a heat medium circuit including the indoor heat exchanger. Air bleeding mode determining means for determining whether or not to perform air bleeding operation; k) when the air bleeding mode determining means determines the air bleeding mode, the heating medium is located in the cistern by the cistern high level sensor When it is detected that the fixed amount is not satisfied, a heat medium is supplied into the cistern by the heat medium supply means, and the heat medium pump is operated to turn on the air. Air bleed operation means for performing a bleed operation.

According to a second aspect of the present invention, in the absorption air conditioner according to the first aspect, the cistern is provided with a cistern low level sensor for detecting a liquid level lower than the cistern high level sensor, and the air vent mode is provided. The determination means is characterized in that when the liquid level detected by the cistern low level sensor is less than the heat medium, the determination means determines the air release mode in which the air release operation is performed.

According to a third aspect of the present invention, in the absorption type air conditioner according to the first aspect, the air bleeding operation means determines whether or not the cis-turn high level sensor is filled with a predetermined amount of the heat medium in the cis-turn for a predetermined time. The air bleeding stop means for stopping the air bleeding operation when detection is performed over the range is provided.

[0009]

[Action and effect of the invention]

When the air release mode determining means determines the air release mode, the cis-turn high level sensor detects whether the heat medium is not filled in the cis-turn by a predetermined amount or not. When the predetermined amount of the heat medium is not filled in the cistern, the heat medium is supplied into the cistern by the heat medium supply means by the air release operation means. And operate the heat medium pump,
Remove the air from the heating medium circuit. When the air escapes, the liquid level falls in the cistern, and the above operation is repeated if the heat medium is not filled in the cistern in a predetermined amount.

According to the first aspect of the present invention, as described above, the absorption air conditioner of the present invention operates in the air release mode.
Automatically operates the heat medium pump and supplies the heat medium into the cistern. Therefore, it is possible to easily perform the air bleeding operation of the heat medium circuit when the absorption type air conditioner is installed.

When the liquid level of the heat medium in the cistern is lower than the liquid level detected by the cistern low level sensor, the air bleed mode determining means determines the air bleed mode and automatically performs the operation. Perform air bleed operation. As a result, when the absorption type air conditioner is installed, the air bleeding operation of the heat medium circuit is automatically started, so that the air bleeding operation is forgotten, and the malfunction such as the operation of the absorption refrigeration cycle does not occur.

According to the third aspect of the present invention, when the cistern high-level sensor detects a state in which the cistern is filled with the heat medium for a predetermined amount for a predetermined time during the air bleeding operation, the air bleeding stop means is automatically activated. Stop the air bleed operation. As a result, there is no need for the operator to monitor whether or not the air bleeding has been completed, thereby facilitating the installation work of the absorption air conditioner.

[0013]

Next, an absorption type air conditioner of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 to FIG. 3 show an embodiment, and FIG. 1 is a schematic configuration diagram of an absorption air conditioner using a double effect absorption refrigeration cycle for performing indoor air conditioning. The absorption type air conditioner 1 of the present embodiment is roughly divided into a heating means 2 for heating an absorbing liquid (a lithium bromide aqueous solution in this embodiment).
A double-effect absorption refrigeration cycle 3, and indoor heat for exchanging cold and hot water (a heat medium of the present invention, water in this embodiment) cooled or heated by the absorption refrigeration cycle 3 with indoor air. A cooling / heating water circuit 5 (corresponding to the heat medium circuit of the present invention) including the exchanger 4; a cooling water circuit 7 including a cooling tower 6 for cooling cooling water (the same water as the cooling / heating water); And a control device 8 for controlling the

[Explanation of Heating Means 2] The heating means 2 of the present embodiment is a gas combustion device which burns a gas as a fuel to generate heat and heats the absorbing liquid by the generated heat. The gas burner 11 includes a gas supply unit 12 that supplies gas to the gas burner 11, a combustion fan 13 that supplies air for combustion to the gas burner 11, and the like.
Then, the heat obtained by the gas combustion of the gas burner 11 heats the boiler 14 of the absorption refrigeration cycle 3, and the boiler 14
It is provided so as to heat the low-concentration absorbing solution inside.

[Description of Absorption Refrigeration Cycle 3] The absorption refrigeration cycle 3 is provided with a boiler 14 heated by the heating means 2, and the low-concentration absorbing liquid in the boiler 14 is heated to reduce the concentration of the low-concentration absorbent. A high-temperature regenerator 15 that vaporizes (evaporates) the refrigerant (water) contained in the absorption liquid to convert the low-concentration absorption liquid into a medium-concentration absorption liquid, and uses the heat of condensation of the vaporized refrigerant in the high-temperature regenerator 15 to form a medium. A low-temperature regenerator 16 that heats the concentration absorbing liquid to vaporize a refrigerant contained in the medium-concentration absorbing liquid to convert the medium-concentration absorbing liquid into a high-concentration absorbing liquid; A condenser 17 for cooling and liquefying the water vapor), an evaporator 18 for evaporating the liquefied refrigerant (water) liquefied in the condenser 17 under a pressure close to vacuum,
An absorber 19 for absorbing the vaporized refrigerant evaporated in the evaporator 18 into the high-concentration absorbent obtained in the low-temperature regenerator 16.

[Explanation of high-temperature regenerator 15] High-temperature regenerator 15
Is provided with the boiler 14 for heating the low concentration absorbing liquid by the heating means 2 as described above. The low-concentration absorbing liquid boiled by the boiler 14 is blown into a cylindrical high-temperature regeneration vessel 22 from a blow-off cylinder 21 extending upward from the boiler 14. The high-temperature, low-concentration absorbent blown into the high-temperature regeneration container 22 collides with a baffle 23 for gas-liquid separation. Then, the low-concentration absorbing liquid blown out into the high-temperature regeneration container 22 is partially evaporated to become a vaporized refrigerant, and the remaining liquid drops around the blowing cylinder 21 to become a medium-concentration absorbing liquid. The vaporized refrigerant is cooled by the heat of the vaporized medium at the time of evaporation of the medium-concentration absorbent in the low-temperature regenerator 16 and cooled by the wall of the high-temperature regenerating container 22 to become a liquefied refrigerant (water).

A liquefied refrigerant (water) is contained in the high-temperature regeneration vessel 22.
A partition tube 24 is provided between the blow-out tube 21 and the high-temperature regeneration container 22 in order to separate the high-concentration absorbent from the medium-concentration absorbent.
The liquefied refrigerant (water) cooled and liquefied in the high-temperature regeneration container 22 and separated outside the partition tube 24 is supplied to the condenser 17 through a liquid refrigerant pipe 25 connected to the lower part. The medium-concentration absorbing liquid separated between the inside of the partition tube 24 and the blow-out tube 21 is supplied to the low-temperature regenerator 16 through a middle liquid pipe 26 connected to the lower part. The middle liquid pipe 26 is provided with a throttle means 27 such as an orifice. When the cooling / heating switching valve 55 to be described later is closed,
When the pressure difference between the high-temperature regenerator 15 and the low-temperature regenerator 16 is maintained, the medium-concentration absorbing liquid flows, and when the cooling / heating switching valve 55 is opened, the medium-concentration absorbing liquid hardly flows.

[Explanation of the low-temperature regenerator 16]
Is provided with a cylindrical low-temperature regeneration container 31 covering the high-temperature regeneration container 22, and injects the medium-concentration absorption liquid supplied through the middle liquid pipe 26 toward the ceiling of the high-temperature regeneration container 22. . Since the temperature in the low-temperature regeneration container 31 is lower than the temperature of the high-temperature regeneration container 22, the pressure in the low-temperature regeneration container 31 is lower than the pressure in the high-temperature regeneration container 22. For this reason, the medium-concentration absorbing liquid supplied from the medium liquid pipe 26 into the low-temperature regeneration container 31 is easily evaporated. Then, when the medium-concentration absorbent is injected into the ceiling of the high-temperature regeneration container 22, the medium-concentration absorption is heated by the walls of the high-temperature regeneration container 22, and a part of the refrigerant contained in the medium-concentration absorption is evaporated. It becomes a vaporized refrigerant, and the rest becomes a high concentration absorbing liquid.

Here, the upper part of the low-temperature regeneration vessel 31 communicates with the upper side of the condensing vessel 32 in the shape of an annular vessel through a communicating part 33. Therefore, the vaporized refrigerant evaporated in the low-temperature regeneration container 31 is supplied into the condensation container 32 through the communication portion 33. On the other hand, the high-concentration absorbing liquid falls to the lower part of the low-temperature regeneration vessel 31 and is supplied to the absorber 19 through the high-liquid pipe 34 connected to the lower part of the low-temperature regeneration vessel 31. A ceiling plate 35 is provided above the low-temperature regeneration container 31, and a gap 36 through which the vaporized refrigerant passes is provided between the outer peripheral end of the ceiling plate 35 and the low-temperature regeneration container 31.

[Explanation of the Condenser 17] The condenser 17 is covered by a condensing container 32 having an annular container shape. Inside the condensing container 32, a condensing heat exchanger 37 for cooling and liquefying the vaporized refrigerant in the condensing container 32 is arranged. The condensing heat exchanger 37 is an annular coil through which cooling water flows. The liquefied refrigerant supplied from the low-temperature regenerator 16 into the condensing container 32 is supplied to the condensing heat exchanger 3.
The mixture is cooled and liquefied by 7 and dropped below the condensing heat exchanger 37.

On the other hand, a refrigerant is supplied to the lower side of the condensing vessel 32 from the high temperature regenerator 15 through the liquid refrigerant pipe 25. When the supplied refrigerant is supplied into the condensing container 32, the pressure difference (the pressure inside the condensing container 32 is about 70 mmHg).
From low pressure), the mixture is reboiled, and supplied in a state where the vaporized refrigerant and the liquefied refrigerant are mixed. Further, a low-liquid supply pipe 38 that guides the liquefied refrigerant to the evaporator 18 is connected to the condensation container 32. The low liquid supply pipe 38 has a refrigerant valve 3 for adjusting the supply amount of the liquefied refrigerant supplied from the condensation container 32 to the evaporator 18.
9 are provided.

[Explanation of the evaporator 18] The evaporator 18 is provided together with the absorber 19 at the lower part of the condensing container 32. Covered. An evaporation heat exchanger 42 for evaporating the liquefied refrigerant supplied from the condenser 17 is disposed outside the inside of the evaporation absorption container 41. This evaporating heat exchanger 42 is an annular coil,
The heat medium (cold / hot water) supplied to the indoor heat exchanger 4 by the cold / hot water circuit 5 flows inside. The liquefied refrigerant supplied from the condenser 17 via the low liquid supply pipe 38 is sprayed onto the evaporating heat exchanger 42 from the refrigerant spraying tool 43 disposed above the evaporating heat exchanger 42. .

Since the inside of the evaporating and absorbing vessel 41 is kept substantially at a vacuum (for example, 6.5 mmHg), it has a low boiling point, and the liquefied refrigerant sprayed to the evaporating heat exchanger 42 is very easy to evaporate. The liquefied refrigerant sprayed on the evaporating heat exchanger 42 evaporates by removing heat of vaporization from the heat medium flowing in the evaporating heat exchanger 42. As a result, the heat medium flowing in the evaporating heat exchanger 42 is cooled. Then, the cooled heat medium is guided to the indoor heat exchanger 4 via the cold / hot water circuit 5, and exchanges heat with air blown into the room to cool the room.

[Description of Absorber 19] The absorber 19 is covered with the evaporation absorption container 41 as described above. The absorber 19 is provided inside the evaporative absorption container 41 with the high liquid pipe 3.
An absorption heat exchanger 44 for cooling the high-concentration absorption liquid supplied from 4 is arranged. This absorption heat exchanger 44
Cooling water for cooling the high-concentration absorbing liquid sprayed on the coil is supplied inside the annular coil. After passing through the heat exchanger 44 for absorption, the cooling water passes through the heat exchanger 37 for condensation in the condenser 17, is led to the cooling water circuit 7, is cooled by the cooling tower 6, and is then again absorbed by the cooling tower 6. It is led to the heat exchanger 44.

On the other hand, above the absorption heat exchanger 44, an absorption liquid spraying device 45 for spraying the high concentration absorption liquid supplied from the high liquid pipe 34 to the absorption heat exchanger 44 is arranged. The high-concentration absorbing liquid sprayed on the absorption heat exchanger 44 drops along the coil surface of the absorption heat exchanger 44 from above to below, and is vaporized by the evaporation in the evaporation heat exchanger 42. Absorbs refrigerant. As a result, the absorption liquid that has fallen to the bottom of the evaporation absorption container 41 becomes a low-concentration absorption liquid having a reduced concentration. At the bottom of the evaporative absorption container 41, the evaporative absorption container 41
A low liquid pipe 46 for supplying the low concentration absorbing liquid at the bottom of the boiler 14 to the evaporator 14 is connected. The low-liquid pipe 46 is provided with a solution pump 47 for flowing the low-concentration absorption liquid from the evaporation absorption container 41 in a substantially vacuum state toward the boiler 14.

[Explanation of other components in absorption refrigeration cycle 3] Reference numeral 51 shown in FIG. 1 denotes a medium-concentration absorbent flowing from the high-temperature regenerator 15 to the low-temperature regenerator 16, and a reference numeral 51 represents the absorption from the absorber 19 to the evaporator 14. A high-temperature heat exchanger for exchanging heat with the low-concentration absorbent flowing to the low-temperature regenerator 1 from the high-temperature regenerator 15
6 is used to cool the medium-concentration absorbing liquid, and conversely to heat the low-concentration absorbing liquid flowing from the absorber 19 to the boiler 14. Reference numeral 52 shown in FIG. 1 denotes a low-temperature heat exchanger that exchanges heat between the high-concentration absorbent flowing from the low-temperature regenerator 16 to the absorber 19 and the low-concentration absorbent flowing from the absorber 19 to the boiler 14, The high-concentration absorbent flowing from the low-temperature regenerator 16 to the absorber 19 is cooled, while the low-concentration absorbent flowing from the absorber 19 to the boiler 14 is heated.

The absorption refrigeration cycle 3 of this embodiment is provided with a heating operation means 53 for performing a heating operation in addition to the cooling operation by the above operation. The heating operation means 53 branches off from the middle of the middle liquid pipe 26 that guides the medium-concentration absorbent from the high-temperature regenerator 15 to the low-temperature regenerator 16, and evaporates the high-temperature absorbent into the evaporator 18 and the absorber 19. It comprises a heating pipe 54 leading to the absorption container 41 and a cooling / heating switching valve 55 for opening and closing the heating pipe 54. The cooling / heating switching valve 55 is opened during the heating operation to guide the high-temperature absorbing liquid into the evaporating and absorbing vessel 41, and the evaporating heat exchanger 42 of the evaporator 18.
It heats cold and hot water flowing inside.

[Explanation of the indoor heat exchanger 4] The indoor heat exchanger 4
Is a gas-liquid heat exchanger that is installed in the room and exchanges heat between the cold and hot water that has passed through the evaporator 18 and the indoor air, and forcibly heats the cold and hot water that flows through the indoor heat exchanger 4 and the indoor air. Exchange,
An indoor fan 61 for blowing the air after the heat exchange into the room is provided.

[Explanation of the cold / hot water circuit 5] The cold / hot water circuit 5 guides the cold / hot water passing through the evaporator 18 to the indoor heat exchanger 4 installed in the room, and exchanges heat with the indoor air. In the cold / hot water circuit 5, as shown in FIG. 2, a cold / hot water pump 62 (a heat medium of the present invention) for pumping cold / hot water is provided in addition to the indoor heat exchanger 4. And a cistern 63 for storing cold and hot water and refilling the cold and hot water in the cold and hot water circuit 5.

The cistern 63 has a high level switch 64 (corresponding to a cistern high level sensor of the present invention) for detecting whether or not a predetermined amount of cold temperature is satisfied therein, and a lower level than the high level switch 64. A low level switch 65 (corresponding to a cistern low level sensor of the present invention) for detecting a water level,
The output is provided to the control device 8.

A water supply pipe 66 (corresponding to a heating medium supply means of the present invention) for supplying cold / hot water (tap water) to the inside is connected to the cistern 63. In this water supply pipe 66,
A water supply valve 67 (corresponding to a heat medium valve of the present invention) for supplying and stopping cold and hot water into the cistern 63 is provided. Further, the cistern 63 is provided with overflow water supply means 68 for guiding the overflowed cold / hot water into a cooling water tank described later.

[Explanation of the cooling tower 6] The cooling tower 6 includes the absorber 1
The cooling water that has passed through the condenser 9 and the condenser 17 flows downward from above, exchanges heat with the outside air while flowing to radiate heat, and partially evaporates during the flow, thereby cooling during the evaporation. An evaporating type that removes heat of vaporization from the water and cools the flowing cooling water, and a spraying part 71 for spraying the cooling water upward and an evaporating part 72 having a large surface area through which the cooling water flows.
And a collecting section 7 for collecting the cooling water passing through the evaporating section 72.
And 3. The cooling tower 6 includes a cooling water fan 74 that generates an air flow in the evaporating section 72 and promotes evaporation and cooling of the cooling water in the evaporating section 72.

[Description of Cooling Water Circuit 7] The cooling water circuit 7
The cooling water whose temperature has passed through the absorber 19 and the condenser 17 is led to the cooling tower 6, and the cooling water cooled in the cooling tower 6 is sent to the absorber 19 and the condenser 17 again. In the cooling water circuit 7, in addition to the cooling tower 6, a cooling water pump 75 for pumping the cooled cooling water to the absorber 19,
And a cooling water tank 76 for storing cooling water.

The cooling water tank 76 is located below the cooling tower 6.
Further, it is provided below the cistern 63 so that the cooling water that has passed through the cooling tower 6 is supplied and the water that overflows in the cistern 63 is supplied. The cooling water tank 76 has a high water level sensor 77 for detecting a high water level and a low water level sensor 7 for detecting a low water level.
When the water level falls below the low water level sensor 78, the water supply valve 67 is opened, water overflows from the cistern 63, and the overflowed water is guided from the overflow water supply means 68 into the cooling water tank 76, and the high water level sensor 77 is provided so as to replenish the cooling water until the water level is detected.

[Description of Control Device 8] The control device 8 includes the above-described refrigerant valve 39, solution pump 47, indoor fan 61, cold / hot water pump 62, cooling / heating switching valve 55, water supply valve 67, cooling water fan 74, cooling water Electrical functional components such as pump 75,
And electric functional components of the heating means 2 (combustion fan 13, gas amount control valve 81, gas on-off valve 82, ignition device 83, etc.)
Is controlled in accordance with an operation instruction of a controller (not shown) manually set by a user and input signals of a plurality of sensors provided.

The control device 8 performs three controls (air bleed mode determination means 84, air bleed operation means 85, and air bleed stop) based on the detection signals of the high level switch 64 and the low level switch 65 provided in the systern 63. Means 86).

The air bleeding mode determining means 84 determines that the air bleeding is to be performed immediately after the installation when the water level of the cold / hot water is less than the detected level of the low level switch 65 when the power is turned on. . Air release operation means 85
Operates when the air release mode determination means 84 determines the air release mode.
When the water level of the cold and hot water is not at the detection position, the water supply valve 67 is opened to supply the cold and hot water from the water supply pipe 66 into the cistern 63. When the level of the cold / hot water rises to the detection position of the high level switch 64, the water supply valve 67 is closed to stop the supply of the cold / hot water to the cistern 63, and the cold / hot water pump 62 is operated. When the water level of the cold / hot water at the detection position of the high level switch 64 decreases, the water supply valve 67
Is opened and the above cycle is repeated to remove the air contained in the cold / hot water circuit 5 and fill it with cold / hot water. The air bleeding stop unit 86 stops the air bleeding operation when the bleeding of the chilled / hot water circuit 5 is completed when the water level of the chilled / hot water at the detection position of the high level switch 64 does not decrease for a predetermined time. is there. The timing of opening the water supply valve 67 in the air release operation is determined by the high level switch 6.
The reason for turning off 4 is to keep the systern 63 almost completely filled with water at all times. In the case of the air bleeding operation in which the water level rapidly decreases, it is not enough to start the water supply by turning off the low level switch 65. Hot and cold water pump 6
2 is a cause of failure by inhaling air.

Next, the air release mode determination means 84,
The operation of the air release operation means 85 and the air release stop means 86 will be described with reference to the flowchart of FIG. When the power is turned on (start), first, the low level switch 65
It is determined whether or not is ON (step S1). If the result of this determination is YES, the routine proceeds to the normal routine of step S2, and normal air conditioning control is performed.

If the result of the determination in step S1 is NO, the air release mode is determined, the water supply valve 67 is opened, and water is supplied into the cistern 63 (step S3). Next, it is determined whether or not the high level switch 64 has been turned ON by this water supply (step S4). If this determination is NO, the process returns to step S4, and if YES, the water supply valve 67
And shut off the water supply into the cistern 63,
The cold / hot water pump 62 is operated to pump cold / hot water into the cold / hot water circuit 5 (step S5).

Next, it is determined whether or not the high level switch 64 has been kept ON for a predetermined time (for example, 10 seconds) (step S6). If the determination result is NO, the operation of the cold / hot water pump 62 is stopped (step S7), and the process returns to step S3. If the decision result in the step S6 is YES, it is determined that the air bleeding is completed, the operation of the cold / hot water pump 62 is stopped (step S8), and the process is thereafter terminated.

In the present embodiment, the operation of the cold / hot water pump 62 is repeatedly started and stopped in conjunction with the opening and closing of the water supply valve 67. However, the cold / hot water pump 62 is always operated during the air release operation. May be activated. Further, when an air conditioning instruction is given from the controller, the air conditioning control may be provided after the air bleeding operation is completed.

[Effect of Embodiment] When the absorption type air conditioner 1 is installed and the power is turned on, the low level switch 65 is turned off.
Since it is in the F state, the air release mode is determined, and the air release operation (cold / hot water filling operation) is started automatically. Then, supply of cold / hot water to the cold / hot water circuit 5 and the cold / hot water pump 62
Is automatically controlled to automatically release air from the cold / hot water circuit 5 (fill with cold / hot water). Then, when the release of air from inside the cold / hot water circuit 5 is completed and the water level of the cistern 63 does not decrease, the air bleeding operation is automatically stopped. That is, in the absorption-type air conditioner 1 of the present embodiment, all operations for air bleeding are automatically performed only by turning on the power after installation. As a result, the burden on the operator can be reduced, and the occurrence of a malfunction due to an operator's operation error (forgetting to remove air) can be reliably eliminated.

Also, by providing two switches, a high-level switch 64 and a low-level switch 65, in the systern 63, when the high-level switch 64 is on and the low-level switch 65 is off, It is possible to detect that one of them has failed. Similarly, the high water level sensor 77 and the low water level sensor 7 are provided in the cooling water tank.
In the case where the high water level sensor 77 detects the water level and the low water level sensor 78 does not detect the water level by providing the two sensors 8, one of the two has failed. Can be detected.

[Modifications] The numerical values shown in the above embodiments are merely examples for explaining the embodiments, and the present invention is not limited to the numerical values of the embodiments but is suitable for the purpose of use and the apparatus. Can be adopted. As an example of the air bleed determination means, a cis-turn low level sensor (low level switch) is provided in the cis-turn, and when the heat medium is not present at a low liquid level of the cis-turn, the air-release mode is determined. When the low level sensor is abolished and the cistern high level sensor does not detect the liquid level of the liquid medium for a predetermined time (for example, 20 seconds),
The air release mode may be determined. That is, water supply is started by turning off the cistern high level sensor, and stopped by turning on the cistern high level sensor.
This is because, when water is supplied into the cistern, the cistern high level sensor cannot be turned off for the predetermined time. In addition, as a judgment of the air release mode, a manually set air release switch is provided,
It may be determined that air is to be released based on the ON-OFF state of the air release switch.

In the above embodiment, the double-effect absorption refrigeration cycle 3 has been described as an example. However, a single-effect absorption refrigeration cycle may be used, or a triple-effect or multiple-effect absorption refrigeration cycle may be used. It can be a cycle. In addition, when the medium-concentration absorbing liquid is injected into the low-temperature regenerator, an example has been described in which the medium is injected from above the low-temperature regenerator, but may be injected from below.

Although a gas burner is used as a heating source of the heating means, 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. Although the example in which the heat exchanger for condensation, the heat exchanger for evaporation, and the heat exchanger for absorption are provided in a coil shape is shown, the heat exchanger of another type such as a tube and fin or a stacked heat exchanger is used. Is also good. Although an aqueous lithium bromide solution has been described as an example of the absorbing liquid, other absorbing liquids such as an aqueous ammonia solution using ammonia as a refrigerant and water as an absorbent may be used.

Although an example in which tap water is used as the heat medium and shared with the cooling water in the cooling water circuit has been described, other heat medium such as antifreeze or oil different from the cooling water in the cooling water circuit may be used. good. In this case, a tank (heat medium supply means) for storing the heat medium may be connected to the cistern, and the heat medium in the tank may be guided into the cistern by controlling the heat medium valve.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an absorption type air conditioner.

FIG. 2 is a schematic diagram of a main part of a cooling / heating water circuit.

FIG. 3 is a flowchart showing the operation of the control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Absorption air conditioner 2 Heating means 3 Absorption refrigeration cycle 4 Indoor heat exchanger 5 Cold / hot water circuit (heat medium circuit) 15 High temperature regenerator 16 Low temperature regenerator 17 Condenser 18 Evaporator 19 Absorber 62 Cold / hot water pump (heat) Medium pump) 63 Systurn 64 High level switch (cisturn high level sensor) 65 Low level switch (cisturn low level sensor) 66 Water supply pipe (heat medium supply means) 67 Water supply valve (heat medium valve) 84 Air release mode determination means 85 Air Air release operation means 86 Air release stop means

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F25B 15/00 F24F 5/00 101 F25D 9/00

Claims (3)

(57) [Claims] A) a heating means for heating the absorbing liquid; b) a regenerator for heating the absorbing liquid with the heating means to vaporize a part of the absorbing liquid; and cooling the vaporized refrigerant generated in the regenerator. A condenser for evaporating the liquefied refrigerant liquefied by the condenser under a low pressure; an absorption refrigeration cycle including an absorber for absorbing the vaporized refrigerant evaporated by the evaporator into an absorbent; c. A) an indoor heat exchanger which is installed in the room and exchanges heat between the indoor air and the heat medium; and d) transfers the heat medium cooled by the evaporation latent heat being taken off when the liquefied refrigerant evaporates in the evaporator. A heat medium circuit that guides the heat medium, which has been exchanged with the indoor air by the indoor heat exchanger to the heat exchanger, to the evaporator again; and e) heat provided in the heat medium circuit and circulating the heat medium. A medium pump; f) installed in the heat medium circuit. G) a heating medium supply means for supplying a heating medium to the cis-turn; and h) a heating medium provided in the heating medium supply means for supplying and stopping the heating medium to the cis-turn. A valve; i) a cis-turn high level sensor for detecting whether or not the cis-turn is filled with a predetermined amount of heat medium; j) whether or not to perform an air bleed operation of the heat medium circuit including the indoor heat exchanger. And k) when the air release mode determination means determines the air release mode, the cis-turn high level sensor detects that a predetermined amount of the heat medium is not filled in the cis-turn. Then, a heat medium is supplied into the cistern by the heat medium supply means, and the heat medium pump is operated to perform an air release operation. An absorption-type air conditioner comprising operating means. 2. The absorption type air conditioner according to claim 1, wherein the cis-turn is provided with a cis-turn low level sensor for detecting a liquid level lower than the cis-turn high level sensor. An absorption type air conditioner characterized by determining an air bleed mode in which an air bleed operation is performed when the liquid level detected by the cistern low level sensor is not filled with a heat medium. 3. The absorption air conditioner according to claim 1, wherein the air venting operation means detects the state in which the cis-turn high level sensor is filled with a predetermined amount of heat medium in the cis-turn for a predetermined time. In this case, an absorption type air conditioner is provided with an air release stop means for stopping the air release operation.