JP2646516B2 - Absorption type air-cooled heat pump air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an absorption type air-cooled heat pump air conditioner.

(Prior Art and Object of the Invention) Although the absorption cycle is widely used in various cooling and heating water apparatuses, it has hardly been practically used as a heat pump cooling and heating apparatus, particularly as an air cooling heat pump cooling and heating apparatus.

An object of the present invention is to achieve practical use of an absorption-type air-cooled heat pump cooling / heating device by enabling switching between cooling and heating operations with a small number of components.

(Configuration of the Invention) The configuration of the present invention will be described with reference to FIGS. 1 and 2 corresponding to the embodiment. The present invention is applied to each of the heat exchange units I and O installed on the indoor side and the outdoor side. , First and second heat exchangers 1 _i , 1 _o ; 2 _i , 2 _o , each of the first heat exchangers 1 _i , 1 _o having one end connected to each of the selection ports of the three-way valve 3. 4 _i , 4 _o , the other ends are joined via check valves 5 _i , 5 _o , respectively, and the second heat exchangers 2 _i , 2 _o are each connected at one end to an expansion valve. 6 _i, 6 _o-off valve 7 _i, 7 _o while connected to the selected port 9 _i, 9 _o of the first four-way valve 8 through the parallel paths of the other end of the respective second four-way valve 10 are connected to the respective selection ports 11 _i , 11 _o , the high-temperature refrigerant vapor path 13 from the regenerator 12 is connected to the common inlet 14 of the three-way valve 3, and the first heat exchanger 1 _i , 1 _o Merging part 15 and the first
A refrigerant path 17 is formed between the common inlets 16 of the four-way valves 8, and a common outlet 18 of the first four-way valve 8 is connected to a dilute solution path 19 leading to the regenerator 12. Is connected to a common inlet 22 of the second four-way valve 10 via a gas-liquid mixer 21, and a refrigerant is provided between the common outlet 23 of the second four-way valve 10 and the gas-liquid mixer 21. This constitutes the steam path 24.

In (Advantageous embodiments) above configuration, when performing the heating, as shown in FIG. 1, the three-way valve 3 is first heat the indoor side through the selected port 4 _i a common inlet 14 The first four-way valve 8 is switched so as to communicate with the exchanger 1 _i, and the common inlet 16 and the common outlet 18 are connected.
Through the selection ports 9 _o and 9 _i , respectively.
Switching _o and so as to communicate with the second heat exchanger 2 _i of the indoor side, also, a second four-way valve 10 through the common inlet 22 and common outlet 23 respectively select port 11 _i, 11 _o the second Heat exchanger 2 _i , 2 _o
Switch to communicate with. And with the on-off valve 7 _i corresponding to the second heat exchanger 2 _i of the indoor side is open, on-off valve 7 _o corresponding to the second heat exchanger 2 _o of the outdoor side is closed.

Thus, the high-temperature refrigerant vapor generated by being heated by the heating source 25 in the regenerator 12 passes through the high-temperature refrigerant vapor path 13, passes through the three-way valve 3, and reaches the first heat exchanger 1 _i on the indoor side. ,
Here, heat is radiated into the room and used for heating, and the temperature of the room itself decreases and condenses. Next, the refrigerant reaches the junction 15 through the check valve 5 _i, and from there, passes through the refrigerant path 17 to the common inlet 16 of the first four-way valve 8. The refrigerant from here through selection port 9 _o, and is depressurized through the expansion valve 6 _o reaches the second heat exchanger 2 _o of the outdoor side, take the outside air heat evaporates here. The refrigerant vapor thus robbed of the heat of the outside air passes through the common outlet 23 from the selection port 11 _o of the second four-way valve 10 and reaches the gas-liquid mixer 21 via the refrigerant vapor path 24.

On the other hand, the gas-liquid mixer 21 is supplied from the regenerator 12 to the concentrated solution path 20.
Menstrual is supplied with the concentrated solution, the refrigerant vapor in admixture with the concentrated solution, from the gas-liquid mixer 21 second indoor side through the common inlet 22 and selected ports 11 _i of the second four-way valve 10 It reaches the heat exchanger 2 _i. Thus concentrated solution and refrigerant vapor mixed state that led to the second heat exchanger 2 _i is a dilute solution by absorbing reaction while radiating heat where the indoor side. The dilute solution is then transferred to the heat exchanger
From 2 _i, through the on-off valve 7 _i in an open state, select port 9 _i of the first four-way valve 8, the common outlet 18, regenerator through a dilute solution path 19 21
Reflux.

In the above operation, the first and second heat exchangers 1 _i and 2 _i of the indoor-side heat exchange section I are respectively a condenser of an absorption cycle,
It operates as an absorber to dissipate the heat inside the system to the indoor side, and the second heat exchanger 2 _o of the heat exchange unit O outside the room operates as an evaporator to take the heat of the outside air into the system, In this way, heating by the heat pump operation can be performed.

In the above heating operation, the second
If the frost is generated in the heat exchanger 2 _o, the switch valve 7 _o the closed state to the open before.

Is In this state, the high-temperature refrigerant that has reached the three-way valve 3 as described above to the first heat exchanger 1 _i of the indoor side, first
The heat exchanger 1 _i also slightly dissipates heat, partially condenses, passes through the heat exchanger 1 _i , biases the expansion valve 6 _o , and passes through the on-off valve 7 _o to the second outdoor side. Heat exchanger 2 _o ,
Here heat is dissipated and condensed, and the heat dissipates frost,
Can be removed. Therefore, by the on-off valve 7 _o open the appropriate time in the heating operation, it is possible to perform defrosting as needed by the above-described operation.

In the above defrosting operation, as described above, a part of the high-temperature refrigerant vapor radiates slightly in the first heat exchanger 1 _i on the indoor side, and the second heat exchanger 2 _i on the indoor side Heating is maintained at a temperature at which heating can be performed by heat or absorption heat from the regenerator 12 via the concentrated solution path 20, so that heating can be continued.

Then, in the case of cooling, as shown in FIG. 2, the three-way valve 3 is switched so as to communicate with the first heat exchanger 1 _o of the outdoor side through the selected port 4 _o a common inlet 14 At the same time, the first four-way valve 8 has a common inlet 16 and a common outlet 18,
9 _i, the switching so as to communicate with the second heat exchanger 2 _o of the second heat exchanger 2 _i and the outdoor side of the indoor side through the 9 _o, also,
The second four-way valve 10 is switched so as to pass the second heat exchanger 2 _o, 2 _i and the communication through the common inlet 22 and common outlet 23 respectively select port 11 _o, 11 _i. The opening and closing valve 7 _o corresponding to the outdoor side of the second heat exchanger 2 _o with the opening, closing valve 7 _i corresponding to the second heat exchanger 2 _i of the indoor side is closed.

When switched as described above, the refrigerant and the solution flow as indicated by the phantom lines in FIG.
The second heat exchangers 1 _o and 2 _o operate as condensers and absorbers in the absorption cycle, respectively, to radiate heat in the system to the outside of the room, and to perform second heat exchange in the indoor-side heat exchange unit I. heat exchanger 2 _i operates as an evaporator depriving indoor heat in the system, thus it is possible to perform cooling.

In the above configuration, the gas-liquid mixer 21 has a configuration in which the concentrated solution side is decompressed by the decompression means 26 such as a capillary tube and mixed with the refrigerant vapor in the container, and the like, and the concentrated solution is used as a driving flow. It can also be configured with an ejector that uses refrigerant vapor as a secondary flow, and in the latter case, effectively utilizing the pressure difference,
The absorption operation can be performed under the condition of increased pressure. In this case, the concentration difference of the absorption cycle can be increased, and the absorption temperature can be increased. Can be performed.

The present invention can be applied to an absorption cycle using an appropriate refrigerant and an absorbent.The dilute solution in the above description is a solution containing a large amount of refrigerant, and a concentrated solution is a refrigerant. It represents a solution in a state with a small amount. In the figure, reference numeral 27 denotes a pump, and 28 denotes a solution heat exchanger.

(Effect of the Invention) As described above, the present invention provides the first and second heat exchangers in the heat exchange units installed on the indoor side and the outdoor side, respectively, and switches these by the four-way valve and the three-way valve. By operating either one side of the first heat exchanger as a condenser and alternately operating each of the second heat exchangers as an evaporator or an absorber, air cooling using an absorption cycle is performed. There is an effect that a heat pump cooling / heating device can be configured.

In particular, the present invention uses both of the second heat exchangers, which require a relatively large heat transfer area to operate alternately as absorbers, at all times regardless of the cooling and heating operation. There is an effect that the space efficiency of the section is good.

[Brief description of the drawings]

FIG. 1 and FIG. 2 are system explanatory diagrams showing a heating operation and a cooling operation, respectively, corresponding to the embodiment of the present invention. Symbols 1 _i , 1 _o ... first heat exchanger, 2 _i , 2 _o ... second heat exchanger, 3 ... three-way valve, 4 _i , 4 _o , 9 _i , 9 _o , 11 _i , 11 _o ...... Selection port, 5
_i , 5 _o ... check valve, 6 _i , 6 _o ... expansion valve, 7 _i , 7 _o ... on-off valve,
8,10 …… Four-way valve, 12… High-temperature refrigerant vapor path, 14,16,22…
… Common entrance, 15… Merge, 17 …… Refrigerant path, 18,23…
... Common outlet, 19 ... Dilute solution path, 20 ... Concentrated solution path, 21
... gas-liquid mixer, 24 ... refrigerant vapor path, 25 ... heating source,
26 ... decompression means, 27 ... pump, 28 ... solution heat exchanger.

Claims (2)

(57) [Claims] A first and a second heat exchanger are provided in each of a heat exchange section installed on the indoor side and an outdoor side, and the first heat exchanger has one end side of each of three-way valves. Connected to the selection port, and the other end is joined via a check valve.
The heat exchanger has one end connected to each selection port of the first four-way valve via a parallel path of the expansion valve and the on-off valve,
The other end of each is connected to each selection port of the second four-way valve, the high-temperature refrigerant vapor path from the regenerator is connected to the common inlet of the three-way valve, and the junction of the first heat exchanger and the A refrigerant path is formed between the common inlets of the first four-way valve, the common outlet of the first four-way valve is connected to a dilute solution path leading to the regenerator, and a concentrated solution path from the regenerator is connected to a gas path. An absorption type air cooling, wherein the refrigerant is connected to a common inlet of the second four-way valve via a liquid mixer, and a refrigerant vapor path is formed between the common outlet of the second four-way valve and the gas-liquid mixer. Heat pump air conditioner 2. An absorption type heat pump cooling and heating apparatus according to claim 1, wherein said gas-liquid mixer comprises an ejector using a concentrated solution as a driving flow and a refrigerant vapor as a secondary flow.