JPH02251061A - Absorption type heat pump room cooler/heater - Google Patents

Abstract

PURPOSE:To perform switching of room cooling and heating with small number of components by providing a pair of four-way valves, and composing a dilute solution passage system for circulating from an absorber through one of indoor and outdoor heat exchangers to the absorber, and a refrigerant passage system from the other side of the heat exchanger to the absorber. CONSTITUTION:A four-way valve 6 is so switched as to feed dilute solution from an absorber 3 into an outdoor heat exchanger 4 and refrigerant from a condenser 2 to an indoor room heating heat exchanger 5, and a four-way valve 7 is so switched as to feed dilute solution, refrigerant from the exchangers 4, 5 to the condenser 2, the absorber 3 to compose a dilute solution passage system A passing the exchanger 4 and a refrigerant passage system B passing the exchanger 5. The heat in the system is discharged to the atmosphere through the solution in the exchanger 4 for forming the system A, and the heat in the room is removed in the system through the refrigerant in the exchanger 5 for forming the system B to cool in the room In the case of room heating, the valves 6, 7 are switched to reversely compose the dilute solution passage system A passing the exchanger 5 and the refrigerant passage system B passing the exchanger 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an absorption heat pump air conditioning system.

(Prior Art and Object of the Invention) Absorption cycles have been widely put into practical use in various types of water cooling/heating devices, but have hardly been put into practical use as heat pump cooling/heating devices.

An object of the present invention is to put a heat pump air-conditioning device into practical use by enabling switching between cooling and heating operations with a small number of components.

(Structure of the Invention) The structure of the present invention will be explained with reference to FIGS. 1 to 3 corresponding to the embodiment. The components include an outdoor heat exchanger 4 operated as an indoor heating/cooling heat exchanger 5 and a pair of four-way valves 6 and 7, which are alternately connected to the absorber 3 via the pair of four-way valves 6 and 7. A dilute solution distribution system A that passes through either one of the heat exchangers 4 and 5, indirectly passes through the condenser 2, and then returns to the absorber 3.
and from the condenser 2 to the absorber 3 through the pressure reducing means 8 and the other side of the heat exchanger 4.5 which is alternately connected via the pair of four-way valves 6.7. The four-way valve 6 on the right side is configured to cut the flow of the dilute solution and the refrigerant toward the heat exchangers 4 and 5, and the four-way valve 7 on the other side The structure is such that the respective flows of the dilute solution and the refrigerant from the heat exchanger 4.5 are switched.

(Operation and Examples) When performing air conditioning with the above configuration, for example, as shown in FIG. 1(a), the four-way valve 6 on the left side of the figure
The four-way valve 7 on the right side of the figure is switched to flow the dilute solution from the heat exchanger 4 to the outdoor heat exchanger 4, and the refrigerant from the condenser 2 to the heat exchanger 5 for indoor heating and cooling.
By switching the dilute solution and refrigerant from 5 so that they do not flow in the direction of the condenser 2 and absorber 3, respectively, the refrigerant passes through the dilute solution distribution system A passing through the outdoor heat exchanger 4 and the indoor cooling/heating heat exchanger 5. Distribution system B can be configured.

The refrigerant generated in the regenerator 1 and condensed in the condenser 2 passes through the four-way valve 6 from the pressure reducing means 8 such as an expansion valve to the indoor heating and cooling heat exchanger 5, where it evaporates. Removes the heat from the indoor side, then passes through the four-way valve 7 to the refrigerant distribution system B.
flows toward the absorber 3, where it is absorbed by the concentrated solution supplied from the regenerator 1.

On the other hand, the dilute solution whose temperature has increased due to absorption of the refrigerant passes through the dilute solution distribution system A from the absorber 3 to the four-way valve 6 to the outdoor heat exchanger 4, where it radiates heat to the outside air. The dilute solution whose temperature has been lowered in this way passes through the four-way valve 7, flows through the dilute solution distribution system A toward the condenser 2, and indirectly passes through the condenser 2 to return to the absorber 3. At this time, the dilute solution removes heat from the refrigerant vapor in the condenser 2 and uses it for condensation, and also contributes to preventing a rise in temperature of the absorption liquid during absorption in the absorber 3.

As described above, the heat in the system is released to the outside air via the dilute solution in the outdoor heat exchanger 4 that constitutes the dilute solution distribution system A, and the indoor heating and cooling heat exchanger 5 that constitutes the refrigerant distribution system B. In this process, the indoor air can be cooled by removing heat from the indoor side into the system via the refrigerant.

When heating is performed next, for example, as shown in FIG. 1(b), the four-way valve 6 on the left side of the figure transfers the dilute solution from the absorber 3 to the indoor heating and cooling heat exchanger 5, and then to the condenser. The four-way valve 7 on the right side of the figure switches the refrigerant from each heat exchanger 4.5 to the outdoor heat exchanger 1.
The dilute solution is switched to flow in the absorber 3 and condenser 2 directions, respectively, and a dilute solution distribution system A that passes through the indoor heating/cooling heat exchanger 5 and a refrigerant distribution system B that passes through the outdoor heat exchanger 4 are configured, contrary to the above. can do.

The refrigerant generated in the regenerator 1 and condensed in the condenser 2 passes through the pressure reducing means 8, passes through the four-way valve 6, and reaches the outdoor heat exchanger 4, where it evaporates and absorbs the heat of the outside air. Then, it passes through the four-way valve 7, flows through the refrigerant distribution system B in the same manner as during cooling operation, is introduced into the absorber 3, and is absorbed by the concentrated solution from the regenerator 1.

On the other hand, the dilute solution whose temperature has increased due to the absorption of the refrigerant flows through the dilute solution distribution system A from the absorber 3 through the four-way valve 6 to the indoor heating/cooling heat exchanger 5, where it radiates heat to the indoor side. The dilute solution, whose temperature has been lowered in this way, flows through the four-way valve 7 to the dilute solution distribution system in the same way as during cooling operation, and after being used for condensation of refrigerant vapor in the condenser 2, it is returned to the absorber 3. .

As described above, the outdoor heat exchanger 4 constituting the refrigerant distribution system B
The heat from the outside air is taken into the system through the refrigerant, and the heat inside the system is released indoors through the dilute solution in the indoor heating/cooling heat exchanger 5 that constitutes the dilute solution distribution system A. Indoor heating can be performed by heat pump operation.

As described above, the present invention operates the pair of four-way valves 6 and 7 to connect the heat exchangers to the dilute solution distribution system and the refrigerant distribution system B to the outdoor heat exchanger 4 or the indoor air-conditioning/heating system. can be switched alternately to the heat exchanger 5 for
In this way, a heat pump air conditioning system using an absorption cycle can be constructed.

In the above configuration, the dilute solution distribution system A includes a pump 9 for distributing the dilute solution. It can be installed at an appropriate location on the route leading to the container 3.

Furthermore, by refluxing the dilute solution to the absorber 3 by merging it with the flow of the concentrated solution from the regenerator 1 to the absorber 3, it effectively contributes to preventing the temperature of the absorbent from rising during absorption. You can get it.

Next, the dilute solution distribution system A is provided with a bypass path 10 that bypasses the condenser 2, as shown in FIG. 2, for example.
It can be configured so that only a predetermined proportion of the dilute solution flowing back into the absorber 3 flows into the condenser 2, and in such a configuration, the amount of heat released to the dilute solution in the condenser 2 is reduced. In the case where the dilute solution is combined with the flow of the concentrated solution and refluxed as described above, it is possible to more effectively contribute to preventing the temperature rise of the absorption liquid during absorption.

In addition, in the configuration in which the bypass path 10 is provided, for example, as shown in FIG. The dilute solution is combined with the flow and refluxed to the absorber 3, and the dilute solution that has passed through the condenser 2 is passed through the absorber 3.
It is possible to have a configuration in which the flow is refluxed to the inner lower part, and in this configuration, the temperature of the dilute solution related to absorption of refrigerant vapor can be lowered, so that the temperature rise of the absorption liquid during absorption as described above can be reduced. can be more effectively prevented.

Furthermore, in the configuration in which the above bypass path 10 is provided,
If the dilute solution distribution system is provided with flow ratio adjusting means 11 that can adjust the ratio of the amount of dilute solution passing through the condenser 2 and the amount of dilute solution passing through the bypass path 10, the condenser 2 and the absorber 3 The amount of heat released to the dilute solution can be adjusted. The flow ratio adjusting means 11 is shown by a phantom line in FIGS. 2 and 3, and its specific structure may be any suitable valve device or the like. In addition, FIG. 2 shows a state in which cooling operation is being performed as in FIG. 1(a), and FIG. 3 shows a state in which heating operation is being performed in the same manner as in FIG. 1(b). The operation is the same as the configuration shown in FIG. 1 except for the flow of the dilute solution, so the explanation will be omitted.

Next, in FIGS. 1 to 3, the indoor heating and cooling heat exchanger 5 circulates a heat medium such as cold and hot water between the heat exchange section 12 and the indoor heat exchanger 13, and Although this is shown as a configuration in which heat is exchanged indirectly with the indoor air via the air conditioner, it is also possible to have a configuration in which heat is exchanged directly with the indoor air.

Next, other illustrated components will be described. Reference numeral 14 indicates a pump for sending the dilute solution to the regenerator 1, 15 indicates a solution heat exchanger, and 16 indicates a heating source. The absorption cycle to which the present invention is applied can be either a single effect type or a double effect type, and the refrigerant and absorption liquid can also be selected as appropriate. In the above description, the dilute solution refers to a solution containing a large amount of refrigerant, and the concentrated solution refers to a solution containing a small amount of refrigerant.

(Effects of the Invention) As described above, the present invention includes a regenerator, a condenser, an absorber, an outdoor heat exchanger that selectively operates as an evaporator, an indoor heating and cooling heat exchanger, and a pair of four-way valves. , constitutes a dilute solution distribution system in which the dilute solution flows from the absorber to either side of the heat exchanger which are alternately connected via the pair of four-way valves, indirectly passes through the condenser, and returns to the absorber. At the same time, by configuring a refrigerant distribution system from the condenser, through the pressure reducing means, through the other side of the heat exchanger, which is alternately connected via the pair of four-way valves, to the absorber, heating and cooling switching can be achieved. A possible absorption heat pump cooling/heating device can be constructed, and the switching between heating and cooling is performed by a four-way valve on one side configured to switch the respective flows of the dilute solution and the refrigerant toward the heat exchanger, and from the heat exchanger. This can be done using a pair of four-way valves, one of which is configured to switch the flow of the dilute solution and the refrigerant, respectively, and has the effect of easily switching between cooling and heating operations with a small number of components.

[Brief explanation of drawings]

FIG. 1 corresponds to an embodiment of the present invention, in which (a) shows cooling operation;
(b) is a system explanatory diagram showing the state of heating operation. FIG. 2 is a system explanatory diagram showing the state of cooling operation, corresponding to another embodiment of the present invention. FIG. 3 is a system explanatory diagram showing the state of heating operation, corresponding to still another embodiment of the present invention. Code A: dilute solution distribution system, B: refrigerant distribution system,
1... Regenerator, 2... Condenser, 3... Absorber, 4
...Outdoor heat exchanger, 5...Indoor heating and cooling heat exchanger,
6.7...Four-way valve, 8...Reduction B-means, 9...Pump, 10...Bypass path, 11...Flow rate ratio adjustment means, 12...Heat exchange section, 13.・・Indoor heat exchanger,
14... Pump, 15... Solution heat exchanger, 16...
・Heating source.

Claims (7)

[Claims] (1) The components include a regenerator, a condenser, an absorber, an outdoor heat exchanger that selectively operates as an evaporator, an indoor heating and cooling heat exchanger, and a pair of four-way valves, A dilute solution distribution system is constructed in which the dilute solution passes through either side of the heat exchangers that are alternately connected via four-way valves, and is returned to the absorber via the condenser indirectly, and a decompression means is connected from the condenser to the absorber. In this case, a refrigerant distribution system is formed which reaches the absorber via the other side of the heat exchanger which is alternately connected via the pair of four-way valves, and the four-way valve on one side is connected alternately to the absorber. An absorption heat pump air-conditioning device characterized in that the four-way valve on the other side is configured to switch the respective flows of the solution and the refrigerant, and the four-way valve on the other side is configured to switch the respective flows of the dilute solution and the refrigerant from the heat exchanger. (2) An absorption heat pump air-conditioning device characterized in that the dilute solution distribution system described in item 1 is configured with a path that bypasses the condenser. (3) The dilute solution distribution system described in item 1 or 2 is characterized by having a configuration in which the dilute solution joins the flow of the concentrated solution from the regenerator to the absorber and is refluxed to the absorber. Absorption heat pump air conditioning system (4) The dilute solution distribution system described in item 2 has a configuration in which the dilute solution that has bypassed the condenser is combined with the flow of the concentrated solution from the regenerator to the absorber and refluxed to the absorber, and the dilute solution bypasses the condenser. An absorption heat pump air-conditioning system characterized by a structure in which the dilute solution that has passed through is refluxed to the lower part of the absorber. (5) In the dilute solution distribution system described in paragraph 2, paragraph 3, or paragraph 4, a flow rate ratio adjusting means capable of adjusting the ratio of the amount of dilute solution passing through the condenser to the amount of dilute solution passing through the bypass path. An absorption heat pump air conditioning system characterized by comprising: (6) The indoor air-conditioning/heating heat exchanger described in item 1 is an absorption heat pump air-conditioning/heating device characterized in that it is configured to directly exchange heat with indoor air. (7) The indoor air-conditioning/heating heat exchanger described in item 1 is an absorption heat pump air-conditioning/heating device characterized in that it is configured to indirectly exchange heat with indoor air via a heat medium.