JP2997197B2 - Absorption air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an absorption type air conditioner.

[0002]

2. Description of the Related Art A cooling water circuit in which an outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a loop, and a cooling water pump circulates cooling water, and a cooling source in a low-concentration absorbing liquid by a heating source. A high-temperature regenerator that vaporizes and separates into a medium-concentration absorbent and a vapor refrigerant, a low-temperature regenerator that includes the high-temperature regenerator and separates the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant,
A condenser in which high-temperature vapor refrigerant is sent from each regenerator with the condenser heat transfer tubes disposed therein, and an evaporator in which the liquid refrigerant liquefied in the condenser with the evaporator heat transfer tubes disposed is evaporated under reduced pressure. An absorber provided with the absorber heat transfer tube adjacent to the evaporator, for absorbing the vapor refrigerant evaporated by the evaporator into a high-concentration absorbent sent from the low-temperature regenerator; and a low-concentration absorber in the absorber. An absorption liquid circuit having a solution pump for returning a liquid to the high temperature regenerator, a chilled water pump for flowing chilled water through the evaporator heat transfer tube, and an outdoor control for controlling the chilled water pump, the heating source, and the chilled water pump And an indoor heat exchanger provided with a blower fan and supplied with cold water from the evaporator heat transfer tube,
A flow control valve for adjusting the flow rate of the cold water, air conditioning setting means for setting an air-conditioning state, and bidirectional communication with the outdoor controller, and the air blower is set to the air-conditioning state set by the air-conditioning setting means. An indoor unit 102 having a fan and an indoor controller for controlling the flow rate control valve, and an absorption type in which a power plug 103 for inserting into an outlet 106 installed in the room is provided in an indoor unit power cord 104. An air conditioner B is conventionally known (shown in FIG. 7).

In such an absorption type air conditioner, when the cooling operation is stopped, the following dilution operation is performed in order to lower the temperature in the high-temperature regenerator and prevent crystallization of the absorbing solution. There is a need.

[One Example of Dilution Operation] The outdoor controller stops the operation of the heating source and the chilled water pump, continues the operation of the solution pump and the chilled water pump (about 9 minutes), and partially absorbs the absorbed liquid. To make the concentration uniform.

[0005]

As a result of conducting various tests, the inventors of the present invention have found that the above conventional absorption type air conditioner B is
When the following situations occur, since the dilution operation is not performed, it has been found that problems such as crystallization of the absorbing solution may occur.

When stopping the cooling operation, the power plug 103 is unplugged from the outlet 106 provided in the room without using the operation stop switch 105. If a limb or a cleaning tool is caught on the power cord 104 during the cooling operation, the power plug 103 is disconnected from the outlet 106 provided in the room.

An object of the present invention is to provide an absorption type air conditioner in which the supply of operating power is not carelessly cut off and problems such as crystallization of the absorption liquid are prevented.

[0008]

In order to solve the above problems, the present invention employs the following constitution. (1) An outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a loop, and a cooling water circuit that circulates cooling water by a cooling water pump and a heating source vaporize the refrigerant in the low-concentration absorbing liquid. A high-temperature regenerator that separates the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant by separating the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant; And a condenser into which high-temperature vapor refrigerant is sent from each regenerator, an evaporator heat transfer tube is disposed, and an evaporator for evaporating the liquid refrigerant liquefied in the condenser under reduced pressure is provided along with the evaporator. An absorber in which the absorber heat transfer tube is disposed and the vapor refrigerant evaporated in the evaporator is absorbed by the high-concentration absorbent sent from the low-temperature regenerator; and the low-concentration absorbent in the absorber is regenerated by the high-temperature regeneration. Liquid circuit with solution pump returning to the vessel A cold water pump for flowing cold water to the evaporator heat transfer tube, an outdoor unit having an outdoor controller for controlling the cooling water pump, the heating source, and the cold water pump, and a blower fan, An indoor heat exchanger to which chilled water is supplied from the evaporator heat transfer tube, a flow rate control valve for adjusting the flow rate of the chilled water, air conditioning setting means for setting an air conditioning state, and bidirectional communication with the outdoor controller. An indoor unit having an air conditioner set by the air conditioning setting means and an indoor unit having an indoor controller for controlling the air flow control valve and the air flow control valve, the air conditioner being disposed outdoors. A power supply means connected to a commercial power supply is provided on the outdoor unit side, and power for operating is supplied from the outdoor unit to the indoor unit by a power cord.

(2) It has the configuration of the above (1), and the number of the indoor units is plural. (3) Having the configuration of (1) or (2) above, the tip of the power cord is directly electrically connected to the indoor unit.

[0010]

[Action]

[Claim 1] The high-temperature regenerator is heated by a heating source, and the low-concentration absorbent is vaporized by the refrigerant and separated into the medium-concentration absorbent and the vapor refrigerant. The low-temperature regenerator separates the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant. The vapor refrigerant is sent from each regenerator to the condenser. The vapor refrigerant is condensed by the cooling water flowing through the condenser heat transfer tube and accumulates in the condenser.

The liquid refrigerant sent from the condenser to the evaporator impinges on the evaporator heat transfer tube through which the cold water flows, evaporates and cools the cold water. Indoor cooling is performed by the cooled cold water passing through the indoor heat exchanger. The vapor refrigerant evaporated in the evaporator is absorbed by the high-concentration absorbing liquid sent from the low-temperature regenerator, becomes low in concentration, and accumulates in the absorber. The low concentration absorbent collected in the absorber is returned to the high temperature regenerator by the solution pump.

The outdoor controller controls the cooling water pump, the heating source, and the cold water pump so that the absorbing liquid circulates stably in the absorbing liquid circuit. The indoor controller performs bidirectional communication with the outdoor controller, and controls the blower fan and the flow control valve so that the air conditioner sets the air condition.

According to a second aspect of the present invention, each of the plurality of indoor controllers performs bidirectional communication with the outdoor controller, and the blower fan and the flow rate are controlled so as to be in the air-conditioning state set by the air-conditioning setting means of each indoor controller. Control the control valve.

[Claim 3] If the front end of the power cord whose rear end is connected to the outdoor unit and the electrical connection between the indoor unit and the indoor unit are made by a connector or the like, there is a possibility that the power cord is disconnected or disconnected. The end of the power cord is electrically connected directly to the indoor unit.

[0015]

【The invention's effect】

[Claim 1] In an absorption type air conditioner, a power supply means connected to a commercial power supply installed outdoors is provided on the outdoor unit side, and power is supplied from the outdoor unit to the indoor unit by a power cord. Structure.

Thus, even if the user has a habit of unplugging the power plug from the outlet without using the operation stop switch when stopping the cooling operation, even if the user is going to stop the cooling operation, he or she may go out of the room. There is no need to disconnect the power supply means connected to the commercial power supply.

Further, even if a limb or a cleaning tool is hooked on the power cord of the indoor unit during the cooling operation, the operating power supplied to the indoor and outdoor units is not cut off. For this reason, there is no possibility that the power supply of the indoor / outdoor unit is turned off during the cooling operation or the dilution operation, and it is possible to prevent problems such as crystallization of the absorbing solution.

[Regarding Claim 2] The absorption type air conditioner comprises:
A power supply means connected to a commercial power supply installed outdoors is provided on the outdoor unit side, and a power cord supplies operating power to the plurality of indoor units from the outdoor unit. With this, even when the cooling operation is stopped, even if the user has a habit of unplugging the power plug from the outlet without using the operation stop switch, when the cooling operation is stopped, the user goes out to the outdoor state and enters the commercial There is no disconnection of the power supply means connected to the power supply.

Further, even if a limb or a cleaning tool is hooked on the power cord of the indoor unit during the cooling operation, the operating power supplied to the indoor / outdoor unit is not cut off. For this reason, there is no possibility that the power supply of the indoor / outdoor unit is turned off during the cooling operation or the dilution operation, and it is possible to prevent problems such as crystallization of the absorbing solution.

[Claim 3] Since the front end of the power cord whose rear end is connected to the outdoor unit is directly electrically connected to the indoor unit, the connection between the power cord and the indoor unit is disconnected or disconnected. There is no fear. Therefore, during the cooling operation or the dilution operation, there is no possibility that the power of the indoor unit is cut off or the two-way communication is interrupted, and it is possible to prevent problems such as crystallization of the absorbing liquid.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described.
3) will be described with reference to FIGS.

As shown in the figure, a home-use absorption air-conditioning apparatus A comprises a first indoor unit 1, a second indoor unit 2, and a third indoor unit 3.
And an outdoor unit 4 installed outdoors, and a power plug 41 is provided in the outdoor unit power cord 42.

The first indoor unit 1 includes an indoor heat exchanger 11 provided with a blower fan 111, a flow control valve 12 for controlling the flow rate of the cold and hot water 72, a room temperature setter 13 for setting a set room temperature, and a room temperature , A bi-directional communication via the outdoor controller 9 and the power cord 19, and the blower fan 111 and the flow control valve 12 so that the room temperature becomes the set room temperature set by the room temperature setting unit 13. It has an indoor controller 15 for controlling, a combustion lamp (red) 16, a timer lamp (yellow) 17, an operation lamp (green) 18, and the like. The front end of the power cord 19 whose rear end is electrically connected to the terminal block 400 of the outdoor unit 4 is directly electrically connected to the terminal block 100 of the first indoor unit 1 without using a connector or the like.

The No. 2 indoor unit 2 includes an indoor heat exchanger 21 provided with a blower fan 211, a flow control valve 22 for controlling the flow rate of the cold and hot water 72, a room temperature setter 23 for setting a set room temperature, and a room temperature A two-way communication is performed with the room temperature thermistor 24 for detecting the air temperature, the outdoor controller 9 and the power cord 29, and the blower fan 211 and the flow rate control valve 22 are set so that the room temperature becomes the set room temperature set by the room temperature setter 23. An indoor controller 25 to be controlled, a combustion lamp (red) 26, a timer lamp (yellow) 27, an operation lamp (green) 28, and the like are provided. The front end of the power cord 29 whose rear end is electrically connected to the terminal block 400 of the outdoor unit 4 is electrically connected directly to the terminal block 200 of the second indoor unit 2 without using a connector or the like.

The No. 3 indoor unit 3 includes an indoor heat exchanger 31 provided with a blower fan 311, a flow control valve 32 for controlling the flow rate of cold and hot water 72, a room temperature setter 33 for setting a set room temperature, and a room temperature , A bi-directional communication via the outdoor controller 9 and the power supply cord 39, and the blower fan 311 and the flow control valve 32 so that the room temperature becomes the set room temperature set by the room temperature setting unit 33. An indoor controller 35 to be controlled, a combustion lamp (red) 36, a timer lamp (yellow) 37, an operation lamp (green) 38, and the like are provided. The front end of the power cord 39 whose rear end is electrically connected to the terminal block 400 of the outdoor unit 4 is directly electrically connected to the terminal block 300 of the No. 3 indoor unit 3 without using a connector or the like.

The outdoor unit 4 includes a cooling water circuit 40, a gas burner 51, a high-temperature regenerator 52, a low-temperature regenerator 53, a condenser 6,
An absorption liquid circuit 5 having an absorber 7, an evaporator 8, and a solution pump 54, a cold / hot water pump 71, and an outdoor controller 9 are provided.

In the cooling water circuit 40, a cooling tower 43 provided with a cooling tower fan 431, a cooling water tank 44, a cooling water pump 45, an absorber heat transfer tube 46, and a condenser heat transfer tube 47 are sequentially connected in a ring shape. During cooling operation (see FIG. 4), the cooling water pump 45 (1230 liter / h) is operated to circulate the cooling water 48.

The cooling tower fan 431 is provided with an AC condenser motor 432 (100 V, power consumption 80 W, 8 μF, 12
00 rpm / 60 Hz). The AC condenser motor 432 is connected to the A via the TRIAC (trademark).
It is electrically connected to C-100V, and is controlled by the outdoor controller 9 so that the temperature of the cooling water 48 detected by the temperature sensor 433 is maintained at 31.5 ° C.

The temperature sensor 433 is connected to the cooling water pump 4
5- The temperature of the cooling water 48 which is provided in the cooling water pipe 461 connecting between the absorber heat transfer pipes 46 and is supplied to the absorber heat transfer pipes 46 is detected. During the heating operation (see FIG. 5), all the cooling water 48 in the cooling water circuit 40 is drained, and the AC condenser motor 432 is not energized.

The gas burner 51 is of a Bunsen type. Gas is supplied by a gas pipe 514 having gas solenoid valves 511 and 512 and a gas proportional valve 513 connected to each other.
5 supplies combustion air and burns.

At the time of cooling operation (at the time of proportional control), the gas burner 5
1 indicates that the average temperature of the cold / hot water 72 supplied to the indoor heat exchangers 11, 21, 31 becomes 7 ° C. (the cold / hot water thermistor 1).
The input amount is proportionally controlled by the outdoor controller 9 (detected by 0, 20, and 30) (1500 kcal to 4800 k).
cal).

The high-temperature regenerator 52 includes a dome-shaped heating chamber 521 heated by the gas burner 51, a blow-out cylinder 522 erected above, and a refrigerant in the dilute liquid 59 (58% aqueous lithium bromide in this embodiment). (Water) is evaporated and the middle solution 55
(A 60% aqueous solution of lithium bromide) and a separation cylinder 523 that separates the vapor refrigerant 56. The heating chamber 52
1, a temperature sensor 520 for measuring the temperature of the high-temperature regenerator 52 (the temperature of the diluted liquid 59) is provided.

During the cooling operation, since the cooling / heating switching valve 81 is closed, the middle liquid 55 (165 ° C.)
1 → high-temperature heat exchange channel 552 → middle liquid pipe 554 with orifice 553 and sent to the upper part of low-temperature regenerator 53.

The low-temperature regenerator 53 includes a high-temperature regenerator 52, and converts the middle liquid 55 sent from the high-temperature regenerator 52 into a concentrated liquid 57 (a 62% aqueous solution of lithium bromide) and a vapor refrigerant 58 during cooling operation. To separate. During the heating operation, the middle liquid 55 is not sent to the low-temperature regenerator 53.

The condenser 6 has an orifice 6 during heating operation.
Although the high-temperature vapor refrigerant 56 is sent from the high-temperature regenerator 52 through the vapor refrigerant pipe 62 with 1, the cooling water 48 does not flow through the condenser heat transfer tube 47, so that it does not condense.

During cooling operation, steam refrigerants 56 and 58 are sent from the high-temperature regenerator 52 and the low-temperature regenerator 53 to the condenser 6, and the vapor refrigerants 56 and 58 are supplied to the coil-shaped condenser heat transfer tubes 4
The liquid refrigerant (water) 63 is cooled and liquefied by the cooling water 48 flowing through the condenser 7, and accumulates at the bottom of the condenser 6. In addition, temperature rise (3
The cooling water 48 (at 7.5 ° C.) is cooled (3
1.5 ° C).

The evaporator 8 is provided with an evaporator heat transfer tube 82 having a coil shape (with a groove). Since the cooling / heating switching valve 81 is opened during the heating operation, the high temperature medium liquid 55 is sent to the evaporator 8 via the middle liquid pipe 551 (the cooling / heating switching valve 81) → the heating pipe 83. At the same time, a high-temperature vapor refrigerant is sent from the condenser 6 via the heating pipe 83 (refrigerant valve 84).

When the refrigerant valve 84 is opened during the cooling operation, the liquid refrigerant 63 is supplied to the heating pipe 83 (refrigerant valve 84) → the sprayer 85.
, And the inside of the evaporator 8 is substantially vacuum (about 6.5 mmHg), so that the liquid refrigerant 63 takes vaporization heat from the cold and hot water 72 flowing through the evaporator heat transfer tube 82. Evaporate. The cooled cold / hot water 72 passes through the indoor heat exchangers 11, 21 and 31 disposed indoors and exchanges heat with the air blown into the room (at maximum capacity, heat absorption 4340).
kcal / h), and the temperature is raised. The heated and cooled water 72 is again passed through the evaporator heat transfer pipe 82 and cooled.

The absorber 7 provided with the absorber heat transfer tube 46 is:
The upper part and the like are connected to the evaporator 8. During the cooling operation, the vapor refrigerant 86 evaporated by the evaporator 8 enters the absorber 7 from above or the like, and the low-temperature regenerator 53 → the concentrated liquid pipe 571 → the low-temperature heat exchange channel 572 → the concentrated liquid pipe 573 → dispersed. Diluted liquid 5 absorbed by the concentrated liquid 57 sprayed onto the absorber heat transfer tube 46 through the heat exchanger 574
9 accumulates at the bottom of the absorber 7. During the heating operation, a high-temperature refrigerant is sent from the evaporator 8.

The solution pump 54 is a three-phase DC brushless motor (rated output 200 W, power consumption 250 W) operated at AC-100V. The solution pump 54 is provided with a Hall element 541, which is feedback-controlled by the outdoor controller 9. Since the flow rate control of the cold / hot water 72 may be broad, the cold / hot water pump 71 and the solution pump 5 may be used.
4 and 4 may be constituted by one tandem pump.

The dilute solution 59 (absorbent during the heating operation) accumulated at the bottom of the absorber 7 is diluted with a diluent pipe 591 → the solution pump 54.
(Maximum flow rate 100 liter / h) → dilute liquid pipe 592 → low temperature heat exchange flow path 593 → high temperature heat exchange flow path 594 → sent to heating chamber 521 of high temperature regenerator 52 via dilute liquid pipe 595.

The outdoor controller 9 controls the following controlled members based on signals from operation switches (not shown), cold / hot water thermistors 10, 20, 30, room temperature thermistors 14, 24, 34, and temperature sensors 433, 520. Control. Controlled members: gas solenoid valves 511, 512, gas proportional valve 513, cold / hot water pump 71, solution pump 54, AC condenser motor 432, refrigerant valve 84, cooling / heating switching valve 81, cooling water pump 45, combustion lamps 16, 26 , 36 (red), timer lamps 17, 27, 37 (yellow), operation lamps 18, 28, 38 (green) Note that the combustion lamps 16, 26, and 36 are lamps that turn on when the gas burner 51 is burning, timer lamps 17 , 27, 3
Reference numeral 7 denotes a lamp which is turned on when the timer is operating, and operation lamps 18, 28 and 38 are lamps which are turned on during operation.

The power plug 41 corresponds to the power supply means of the present invention, and is provided at the end of the outdoor unit power cord 42. In order to prevent the power plug 41 from being detached from the outlet 49 provided outdoors, After the power supply plate 411 is inserted into the hole of the outlet 49, a screw-type cover 412 is screwed into the outlet 49.

Next, the operation of the microcomputer of the outdoor controller 9 when the absorption type air conditioner A during the cooling operation stops the cooling operation will be described with reference to the flowchart shown in FIG. In step s1, it is determined whether or not the evaporator temperature is 1 ° C. or lower. If the temperature is 1 ° C. or lower (YES), the process proceeds to step s3. If it exceeds 1 ° C. (NO), the process proceeds to step s2.

In step s2, it is determined whether or not the evaporator temperature is 3 ° C. or higher. If it is 3 ° C. or higher (YES), the process proceeds to step s4. If it is lower than 3 ° C. (NO), the process returns to step s1. . In step s3, the refrigerant valve 84 is opened, and the process proceeds to step s5. In step s4, the refrigerant valve 84 is closed, and the process proceeds to step s5.

In step s5, it is determined whether or not the operation switch of any of the indoor units has been turned off.
ES) proceeds to step s6, and if not turned off (NO), returns to step s1 to continue the cooling operation.

In step s6, the gas solenoid valves 511, 51
2 is closed to extinguish the gas burner 51, and the process proceeds to step s7. In step s7, the refrigerant valve 84 is kept open, and the process proceeds to step s8. In step s8, a dilution operation described later is performed for about 9 minutes.

In step s9, the temperature of the high-temperature regenerator 52 ≦
It is determined whether or not the temperature is 110 ° C. (the temperature sensor 520 detects a temperature of 110 ° C. or less).
In S), the process proceeds to step s10. If the temperature exceeds 110 ° C., the process returns to step s8 to continue the dilution operation.

In step s10, the refrigerant valve 84 is closed,
Combustion fan 515, solution pump 54, cooling water pump 4
5, and the operation of the cooling tower fan 431 is stopped, and the operation is stopped (the dilution operation ends).

[Dilution operation] The blowing fans 111, 211,
The operation of 311 is stopped, and the operations of the combustion fan 515, the solution pump 54, the cooling water pump 45, and the cooling tower fan 432 are continued. As a result, the liquid refrigerant 63 stored in the condenser 6 is immediately sent to the absorber 7 via the evaporator 8, and the diluted liquid 59 in the absorber 7 is returned to the high-temperature regenerator 52, The absorbent in 52 is diluted. The diluted absorbing liquid in the high-temperature regenerator 52 is supplied to the middle liquid pipe 551 →
The high-temperature heat exchange flow path 552 is sent to the low-temperature regenerator 53 via the middle liquid pipe 554 with the orifice 553, and the absorbent in the low-temperature regenerator 53 is diluted.

The reason why the cooling water pump 45 and the cooling tower fan 431 continue to operate during the dilution operation is to cool the refrigerant quickly. During the dilution operation, the combustion fan 51
The reason for continuing the operation of 5 is to cool the gas burner 51 quickly. Further, during the dilution operation, the cold / hot water pump 7
1. The reason why the operation of the blower fans 111, 211, 311 is stopped is to suppress the temperature rise of the cold / hot water 72 as much as possible (prevent evaporation in the evaporator 8).

[Reason for performing the dilution operation] The gas burner 51 is extinguished by an instruction to stop the cooling operation.
Is heated, the generation of the vapor refrigerants 56 and 58 is promoted by the residual heat, the separation proceeds in the high-temperature regenerator 52 and the low-temperature regenerator 53, and the absorption liquid (the high-temperature regenerator 52 and the low-temperature regeneration Concentration of the absorber 53 and the absorber 7 in the absorber 7), and the possibility of crystallization of the absorber increases. Therefore, when an instruction to stop the cooling operation is issued, the outdoor controller 9 (the indoor controller 15,
25, 35) close the gas solenoid valves 511, 512 to extinguish the gas burner 51, stop the operation of the cold / hot water pump 71, the blower fans 111, 211, 311 and stop the refrigerant valve 84.
Is maintained open, and a dilution operation is performed in which the operation of the solution pump 54, the cooling water pump 45, and the cooling tower fan 431 is continued.

As a result, the liquid refrigerant 63 stored in the condenser 6 is quickly sent to the absorber 7 via the evaporator 8, and the low-concentration absorbing liquid in the absorber 7 is returned to the high-temperature regenerator 52. The absorption liquid in the high-temperature regenerator 52 is diluted. The diluted absorbent in the high-temperature regenerator 52 is supplied to the middle liquid pipe 551.
→ High-temperature heat exchange flow path 552 → Sent to low-temperature regenerator 53 via middle liquid pipe 554 with orifice 553, and the absorbent in low-temperature regenerator 53 is diluted. By such a dilution operation, the absorption liquid (particularly high-temperature regenerator
2. The concentration distribution of the low-temperature regenerator 53 and the absorption liquid in the absorber 7) is quickly averaged, and crystallization of the absorption liquid is prevented.

The absorption type air conditioner A of this embodiment has the following advantages. [A] In the absorption-type air conditioner A, a power plug 41 attached to an outlet 49 provided outside is provided in an outdoor unit power cord 42 of the outdoor unit 4, and the power cords 19, 29, and 39 are used to connect the outdoor unit 4 to the room. This is a structure to supply AC-100V to the machines 1, 2, and 3.

Thus, a user wearing a horizontal clothes (when the cooling operation is stopped, without using the operation stop switch 106,
Even if a user who has a habit of pulling out the power plug 103 from the outlet 106 tries to unplug the power plug from the outlet, there is no power plug in the room, so that the power of the indoor units 1, 2, 3 and the outdoor unit 4 does not drop. Incidentally, there is no way to go outside and unplug the power plug 41 from the outlet 49 provided outdoors.

During the cooling operation, the power cords 19, 2
Even if hands and feet or cleaning tools are hooked on the terminals 9 and 39, the power cords 19, 29 and 39 are connected to the terminal blocks 100, 200 and 300 of the indoor units 1, 2 and 3 and the outdoor unit 4 without using a connector or the like. Since it is directly electrically connected to the terminal block 400, it does not come off and the AC-100V to the indoor units 1, 2, and 3 is not cut off. Therefore, during the cooling operation or the dilution operation, there is no danger that the power of the outdoor unit 4 and the indoor units 1, 2, and 3 is turned off, and that the two-way communication is interrupted. Therefore, it is possible to prevent problems such as the crystallization of the absorbing liquid and the stoppage of the operation command from the indoor units 1, 2, and 3 to the outdoor unit 4.

[A] The power outlet 41 and the power plug 41 of the outdoor unit power cord 42 are connected to the power supply plate 41.
1 is inserted into the hole of the outlet 49, and then the screw-in type cover 412 is screwed into the outlet 49.
The power plug 41 is not easily removed from the outlet 49 even if a cat or a drunk man touches it. For this reason, there is no danger that the power of the outdoor unit 4 and the indoor units 1, 2, and 3 will be turned off during the cooling operation and the dilution operation, and problems such as the stop of the cooling operation and the crystallization of the absorbing liquid are prevented. Can do things.

In the above-described embodiment, the power plug 41 is attached to the outlet 49 disposed outdoors. However, the power line of the commercial power supply is directly connected to the terminal block 400 of the outdoor unit 4. Is also good. In this case, the terminal block 400 corresponds to a power supply unit.

In the above embodiment, a gas burner is used as a heating source, but another heat source, for example, an electric heater may be used.

[Brief description of the drawings]

FIG. 1 is an external view of an absorption type air conditioner according to an embodiment of the present invention.

FIG. 2 is a system diagram of the absorption type cooling and heating device.

FIG. 3 is a principle diagram of an absorption type cooling and heating apparatus according to one embodiment of the present invention.

FIG. 4 is an operation explanatory diagram when the absorption type cooling / heating device is operated for cooling.

FIG. 5 is an operation explanatory diagram when the absorption type cooling / heating device is operated for heating.

FIG. 6 is a flowchart showing the operation of an outdoor controller when the absorption-type air conditioner stops operating.

FIG. 7 is an external view showing a conventional absorption air conditioner.

[Explanation of symbols]

 A Absorption air conditioner (Absorption air conditioner) 1, 2, 3 Indoor unit 4 Outdoor unit 5 Absorbent circuit 6 Condenser 7 Absorber 8 Evaporator 9 Outdoor controller 11, 21, 31 Indoor heat exchanger 12, 22 , 32 Flow control valves 13, 23, 33 Room temperature setting device (air conditioning setting means) 15, 25, 35 Indoor controller 19, 29, 39 Power cord 40 Cooling water circuit 41 Power plug (power supply receiving means) 43 Cooling tower ( Outdoor heat exchanger) 45 Cooling water pump 46 Absorber heat transfer tube 47 Condenser heat transfer tube 48 Cooling water 49 Outlet (commercial power supply) 51 Gas burner (Heating source) 52 High temperature regenerator 53 Low temperature regenerator 54 Solution pump 55 Medium liquid (medium) Concentration absorbing liquid) 56 Steam refrigerant 58 Steam refrigerant 59 Dilute liquid (low concentration absorbing liquid) 71 Cold / hot water pump (cold water pump) 72 Cold / hot water (cold water) 82 Evaporator heat transfer tube 111, 2 11, 311 blower fan

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25B 15/00 F25B 15/00 306

Claims (3)

(57) [Claims] 1. A cooling water circuit that circularly connects an outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube in order, and circulates cooling water by a cooling water pump, and a refrigerant in the low-concentration absorption liquid by a heating source. A high-temperature regenerator that vaporizes and separates into a medium-concentration absorbent and a vapor refrigerant, a low-temperature regenerator that includes the high-temperature regenerator and separates the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant,
A condenser in which high-temperature vapor refrigerant is sent from each regenerator with the condenser heat transfer tubes disposed therein, and an evaporator in which the liquid refrigerant liquefied in the condenser with the evaporator heat transfer tubes disposed is evaporated under reduced pressure. An absorber provided with the absorber heat transfer tube adjacent to the evaporator, for absorbing the vapor refrigerant evaporated by the evaporator into a high-concentration absorbent sent from the low-temperature regenerator; and a low-concentration absorber in the absorber. An absorption liquid circuit having a solution pump for returning a liquid to the high temperature regenerator, a chilled water pump for flowing chilled water through the evaporator heat transfer tube, and an outdoor control for controlling the chilled water pump, the heating source, and the chilled water pump An outdoor unit having a heat exchanger, a blower fan, an indoor heat exchanger to which chilled water is supplied from the evaporator heat transfer tube, a flow control valve for adjusting a flow rate of the chilled water, and an air conditioning state. Air conditioning setting means and An indoor unit that performs bidirectional communication with the outdoor controller and has an indoor controller that controls the blower fan and the flow rate control valve so as to be in the air conditioning state set by the air conditioning setting unit. In the absorption air conditioner, a power-supplied unit connected to a commercial power supply installed outdoors is provided on the outdoor unit side, and a power cord is used to supply operating power from the outdoor unit to the indoor unit. Absorption air conditioner. 2. The absorption type air conditioner according to claim 1, wherein the number of the indoor units is plural. 3. The absorption air conditioner according to claim 1, wherein a tip of the power cord is electrically connected directly to the indoor unit.