JP2000055505A - Combined heat transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance an energy utilization efficiency by effectively using condensation heat generated in a compression type heat transfer device upon cooling for operating an absorption type heat transfer device in a system having the compression type heat transfer device combined with the absorption type heat transfer device. SOLUTION: A combined heat transfer device comprises a compression type heat pump system 1, an absorption type refrigerating system 70 and a heating medium fluid circulation passage 100 including an indoor heat exchanger 101. The heating medium fluid circulation passage 100 extends over both the systems 1 and 70 and the heating medium fluid for cooling is cooled by both the systems 1 and 70. The above device includes a condensation heat supply passage 45 for guiding condensation heat generated in the refrigerant circuit 10 of the compression type heat pump system 1 to the absorption type refrigerating system 70 and a heat exchanger 85 for heating absorption liquid which heats the absorption liquid flowing from the absorber 72 of the absorption type refrigerating system 70 to a regenerator 73 by the condensation heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite heat transfer device including a compression heat transfer device and an absorption heat transfer device.

[0002]

2. Description of the Related Art Conventionally, a compression heat transfer device and an absorption heat transfer device have been known as heat transfer devices constituting a refrigerator or a heat pump.

[0003] The compression heat transfer device circulates the refrigerant discharged from the compressor back to the compressor through a condenser, an expansion valve, and an evaporator, and uses heat absorption in the evaporator and heat radiation in the condenser. It is designed to perform cooling and heating.

The absorption type heat transfer device introduces an evaporator for evaporating the refrigerant, an absorber for absorbing the refrigerant vapor guided from the evaporator into an absorption liquid, and an absorption liquid after the absorption of the refrigerant by the absorber. And a regenerator for releasing the refrigerant from the absorbing liquid,
A condenser for condensing the refrigerant vapor sent from the regenerator, and when using as a refrigerator, taking out cold heat with the evaporator, and when using as a heat pump device, taking out heat with the condenser. Things.

In general, these heat transfer devices are used individually. For example, as shown in Japanese Patent Publication No. 14625/1990, it is also possible to improve the performance by using these heat transfer devices in combination. It is considered. That is, the cooling and heating device disclosed in the above publication is configured to cool or heat by an engine driven compression heat pump and an absorption chiller / heater, and the chilled water for air conditioning returned from the indoor unit during cooling. Is precooled by an absorption chiller / heater and further cooled by a compression heat pump before being sent to the indoor unit. On the other hand, at the time of heating, the hot water for air conditioning returned from the indoor unit is preheated by the compression heat pump, then heated by the absorption chiller / heater, heated by the exhaust heat of the engine, and then sent to the indoor unit. ing. According to such an apparatus, the performance of cooling and heating is enhanced by the synergistic action of the compression heat pump and the absorption chiller / heater.

[0006]

In recent years, the amount of energy consumption has increased with the improvement of living conditions, and it has been demanded from the viewpoint of the global environment to use energy efficiently and to suppress the consumption. Is coming.

In a cooling and heating apparatus using an engine-driven compression heat pump, a method of recovering and utilizing engine exhaust heat by hot water supply or the like at the time of heating is currently being developed. Recovery of engine exhaust heat) has not been sufficiently developed, and particularly, refrigerant condensation heat during cooling operation has been dumped into the atmosphere.

In the cooling and heating apparatus described in the above publication, the heat of condensation generated in the compression heat pump during cooling is not effectively used, but is radiated from the condenser.

In view of such circumstances, the present invention relates to a system in which a compression heat transfer device and an absorption heat transfer device are combined, and a system for condensing heat in a compression heat transfer device at the time of cooling, which was conventionally discarded to the atmosphere. It is an object of the present invention to provide a composite heat transfer device capable of effectively utilizing the heat for operation of an absorption heat transfer device and improving energy use efficiency.

[0010]

According to the present invention, there is provided a compression heat transfer device for circulating a refrigerant by a compressor, and an absorption heat transfer device, wherein the heat transfer fluid circulation path including the indoor heat exchanger is compressed. Combined heat transfer provided over a heat transfer device and an absorption heat transfer device, wherein at least cooling of the heat transfer fluid circulating in the heat transfer fluid circulation path is performed by the compression heat transfer device and the absorption heat transfer device. In the apparatus, a condensed heat supply passage for guiding refrigerant condensation heat generated in a refrigerant circuit of the compression heat transfer device to the absorption heat transfer device, and an absorption liquid flowing from an absorber of the absorption heat transfer device to a regenerator. And an absorbing liquid heating means for heating with the refrigerant condensation heat guided by the condensation heat supply passage.

According to this combined heat transfer device, when cooling or freezing is performed, the heat transfer fluid is sufficiently cooled by both the compression heat transfer device and the absorption heat transfer device, and the performance such as cooling is improved. . In addition, the heat of condensation generated in the compression heat transfer device is effectively used for heating the absorbing liquid in the absorption heat transfer device. Then, by heating the absorbing liquid flowing from the absorber to the regenerator, the refrigerant is efficiently evaporated and separated in the regenerator.

In the apparatus according to the present invention, the condensed heat supply passage circulates water, and the condensed heat transfer passage recovers the condensed heat of the refrigerant in the compression heat transfer device, and absorbs the water passing through the heat exchanger for condensing heat recovery. The condensed heat supply passage may be configured to lead to the heat transfer device. In particular, when the compressor of the compression heat transfer device is driven by a water-cooled engine, the water circulating in the condensed heat supply passage may be engine cooling water. With this configuration, the cooling water flowing through the cooling water circuit in the compression heat transfer device driven by the water-cooled engine is used for collecting the heat of condensation.

Further, in this device, the engine cooling water passing through the heat exchanger for condensing heat recovery and the exhaust gas heat exchanger for recovering the heat of the exhaust gas of the engine is condensed heat-transferred so as to be guided to the absorption type heat transfer device. If the supply passage is configured, the exhaust heat of the engine in addition to the heat of condensation is effectively used for heating the absorbing liquid in the absorption heat transfer device.

The condensed heat supply passage may be configured so that the engine cooling water that has passed through the heat exchanger for condensed heat recovery and the cooling water jacket of the engine is led to the absorption type heat transfer device.

[0015] The condensed heat supply passage may guide the high-temperature and high-pressure refrigerant in the refrigerant circuit of the compression heat transfer device to the absorption liquid heating means of the absorption heat transfer device. With this configuration, the high-temperature and high-pressure refrigerant in the refrigerant circuit of the compression heat transfer device is condensed in the absorbent heating means, and the heat of condensation is directly given to the absorbent.

In the apparatus of the present invention, during cooling or freezing, the heat transfer fluid circulating in the heat transfer fluid circulation path is cooled by the evaporator of the compression heat transfer device and the evaporator of the absorption heat transfer device. It is good to keep it.

Further, the composite heat transfer device of the present invention can be applied to an air conditioner capable of cooling and heating. In this case, during cooling, the heat of condensation of the compression heat transfer device is absorbed by the above-mentioned condensing heat transfer passage. While the heat is sent to the absorption liquid heating means of the device, the heat of condensation of the compression heat transfer device is sent to the indoor heat exchanger during heating. Specifically, at the time of heating, the heat medium fluid in the heat medium fluid circulation path is heated by the condenser of the compression heat transfer device,
What is necessary is just to guide the heated heat medium fluid to the indoor heat exchanger. With this configuration, the condensing heat of the compression heat transfer device is used for heating during heating.

Further, at the time of heating, the heat medium fluid in the heat medium circulation circuit is heated by the exhaust heat of the engine of the engine driven compression heat transfer device, and the heated heat medium fluid is guided to the indoor heat exchanger. Preferably, in this way, the engine exhaust heat is also effectively used for heating.

[0019]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an air conditioner as an example of a composite heat transfer device according to the present invention. The air conditioner includes a compression heat pump system 1 as a compression heat transfer device,
An absorption refrigeration system 70 as an absorption heat transfer device;
A heat medium fluid circulation path 100 including an indoor heat exchanger 101 is provided.

The compression heat pump system 1 includes a water-cooled gas engine 2 (hereinafter abbreviated as engine 2), a refrigerant circuit 10 having a compressor 11 driven by the engine 2, and cooling the engine 2. And a cooling water circuit 40 are provided.

In the main body 3 of the engine 2, a fuel gas supply passage 4 for supplying a fuel gas and an air introduction passage (not shown) are combined by a mixer (not shown) to form a mixture passage (not shown). And the exhaust passage 5 are connected. The fuel gas supply passage 4 is provided with an electromagnetic valve 6 for controlling the flow rate of the fuel gas. The engine body 3 is provided with a water jacket 7.

The exhaust passage 5 has an exhaust gas heat exchanger 8
Is provided, and a linear three-way solenoid valve 9 is provided upstream of the main passage 5a. A main passage 5a for directly guiding the exhaust gas to the exhaust gas heat exchanger 8 is provided between the linear three-way solenoid valve 9 and the exhaust gas heat exchanger 8. And an exhaust gas passage 5b that guides the exhaust gas to the absorption refrigeration system 70 and returns the exhaust gas to the main passage 5a via the heating unit 87 of the regenerator 73 to be described later. And
The linear three-way solenoid valve 9 can adjust the flow ratio between the main passage 5a and the exhaust gas passage 5b.

The refrigerant circuit 10 transmits the refrigerant discharged from the compressor 11 to the compressor 1 through a condenser, an expansion valve, and an evaporator.
This constitutes a closed circuit for circulating back to 1. In the present embodiment, a four-way valve 12 for switching the refrigerant circulation path according to the time of cooling and the time of heating is provided, and the outdoor heat exchanger 13 configuring one of the condenser and the evaporator, and configuring the other Heat exchanger 14 and electronic expansion valves 15, 16, 17.

More specifically, the refrigerant circuit 10 will be described. Between the compressor 11 and the four-way valve 12, a discharge line 21 connecting the discharge port of the compressor 11 and the first port of the four-way valve 12 is provided.
And a suction-side line 22 that connects the second port of the four-way valve 12 and the suction port of the compressor 11. The discharge side line 21 is provided with an oil separator 23 for separating oil from high-pressure refrigerant, and the separated oil is returned to the compressor 11 via a pipe (not shown). Also,
The suction side line 22 is provided with an accumulator 24 for separating the liquid-phase refrigerant and returning only the gas-phase refrigerant to the suction port of the compressor 11.

The third port of the four-way valve 12 has a line 2
The outdoor heat exchanger 13 is connected via the reference numeral 5. In the middle of this line 25, a double tube heat exchanger 26 (a heat exchanger for the purpose of transferring heat from the cooling water to the refrigerant,
-R heat exchanger 26). A receiver 28 is connected to the outdoor heat exchanger 13 via the electronic expansion valve 16.
Is connected. Further, the receiver 28 and the heat exchanger 14
Are connected via an electronic expansion valve 15. on the other hand,
A heat exchanger 14 is connected to a fourth port of the four-way valve 12 via a line 30.

Further, the refrigerant circuit 10 is provided with a bypass passage 31 branched from the discharge side line 21 between the compressor 11 and the four-way valve 12 and having a downstream end reaching the receiver 28. An electronic expansion valve 17 is provided in the bypass passage 31. A heat exchanger 32 for condensing heat recovery (a heat exchanger for transferring heat from refrigerant to cooling water) is provided upstream of the electronic expansion valve 17. Therefore, the RW heat exchanger 32 will be hereinafter referred to), and an electromagnetic valve 33 for adjusting the flow rate is provided upstream of the RW heat exchanger 32.

The cooling water circuit 40 has a main passage 41
And a water pump 42, the RW heat exchanger 32, the water jacket 7, and a radiator 44,
The cooling water discharged from the water pump 42 is supplied to the RW heat exchanger 3
2. The main passage 41 returns to the water pump 42 through the water jacket 7, the exhaust gas heat exchanger 8, and the radiator 44.
Are formed.

The exhaust gas heat exchanger 8 and the radiator 44
Passage 4 for condensed heat supply branched from main passage 41 between
5 are provided. The passage 45 extends to the absorption refrigeration system 70 side, passes through a heat exchanger 85 for heating the absorption liquid, which will be described later, and passes through the main passage 4 between the radiator 44 and the water pump 42.
1 is formed.

Further, a heat exchanger 85 is provided in the passage 45.
And a passage 47 passing through a heat exchanger 48 for supplying heat to the heat medium fluid in the heat medium fluid circulation path 100, bypassing the heat exchanger 85. Electromagnetic valves 50, 51, 52, and 53 are provided in the main passage 41, the passage 45, the bypass passage 46, and the passage 47 downstream of the branch point of the passage 45, respectively, to cool these passages. The ratio of water circulation is regulated.

Further, there is provided a passage 55 which branches off from the main passage 41 downstream of the exhaust gas heat exchanger 8 and guides a part of the high-temperature cooling water to the WR heat exchanger 26. Through the -R heat exchanger 26, it reaches the main passage 41 downstream of the radiator 44. An electromagnetic valve 56 for adjusting the flow rate is provided in the middle of the passage 55.

On the other hand, the absorption refrigeration system 70 is a single-effect cycle in this embodiment, and includes an evaporator 71, an absorber 72, a regenerator 73, and a condenser 74, between which a refrigerant and an absorbent are supplied. A passage is provided, and a cooling water circuit 90 for cooling the refrigerant and the absorbing liquid in the absorber 72 and the condenser 74 is provided.

In the evaporator 71, a heat transfer tube 75 forming a part of the heat medium fluid circulation path 100 is disposed in a container maintained at a high vacuum, and a refrigerant liquid such as water introduced from the upper portion is supplied to the heat transfer tube 75. 7
The heat transfer fluid (water) in the heat transfer tube 75 is deprived of heat corresponding to the heat of vaporization by being dropped on the evaporator 5 and evaporated. The evaporator 71 is connected to a refrigerant liquid passage 77 for guiding a refrigerant liquid from a condenser 74 and a refrigerant vapor passage 78 for extracting refrigerant vapor generated in the evaporator 71.
Further, a passage 79 provided with a refrigerant pump 80 is connected to the evaporator 71 in order to return the unevaporated refrigerant (refrigerant liquid) stored at the bottom of the evaporator 71 to the upper part of the evaporator 71.

In the absorber 72, the absorbing liquid is dropped into a container maintained at a high vacuum so that the refrigerant vapor sent from the evaporator 71 is absorbed by the absorbing liquid.
The absorber 72 is connected to the refrigerant vapor passage 78, a concentrated solution passage 81 for leading the absorbing liquid from the regenerator 73, and a dilute solution passage 82 for leading the absorbing liquid (dilute solution) after absorbing the refrigerant. The dilute solution passage 82 is provided with a solution pump 83 for sending the dilute solution to the regenerator 73.

The regenerator 73 is adapted to evaporate and separate the refrigerant by heating the dilute solution sent from the absorber 72. The dilute solution passage 82 is provided above the regenerator 73 to introduce the dilute solution. Are connected to each other, and a refrigerant vapor passage 84 and a concentrated solution passage 81 are formed at an upper end and a lower end of the regenerator 73 to derive the separated refrigerant vapor and the absorbent (concentrated solution) after the refrigerant separation. It is connected.

The condenser 74 cools the refrigerant vapor sent from the regenerator 73 with cooling water to condense and liquefy the refrigerant vapor. A refrigerant vapor passage 84 is connected to the upper end of the condenser 74. On the other hand, a refrigerant liquid passage 77 is connected to a lower end of the condenser 74.

In the absorption refrigeration system 70, a heat exchanger 85 for heating the absorption liquid is provided in the dilute solution passage 82 between the absorber 72 and the regenerator 73 as absorption liquid heating means. The heat exchanger 85 is connected to the passage 45 for supplying the condensed heat. Further, the heat exchanger 85
The dilute solution passage 82 between the
A solution heat exchanger 86 for performing heat exchange between the dilute solution therein and the concentrated solution in the concentrated solution passage 81 is provided.

The regenerator 73 is provided with a heating section 87 for heating the dilute solution in the regenerator 73 to evaporate the refrigerant. In this embodiment, the exhaust gas passage 5b is connected to the heating section 87, and the regenerator 73 is connected to the exhaust gas of the engine.
Is to be heated.

The cooling water circuit 90 is disposed inside the outdoor heat exchanger 91 functioning only as a radiator, a pump 92, a passage 93 disposed inside the absorber 72, and inside the condenser 74. The cooling water formed over the passage 94 and cooled by the outdoor heat exchanger 91 is supplied to the absorber 72.
And to the condenser 74 to cool them.

The heat medium fluid circulation path 100 is
1, a heat transfer tube 75, a heat exchanger 14,
A heat exchanger 48 for supplying engine exhaust heat, and a control valve 102
And the indoor heat exchanger 101 and the pump 103,
It is configured to circulate water as a heat transfer fluid. Further, the heat transfer medium 75 is
The bypass passage 105 for bypassing the three-way solenoid valve 104
Connected through.

The control valve 102 and the indoor heat exchanger 101
Is provided in the indoor unit 106 installed in each room for cooling and heating.

The operation of the combined heat transfer apparatus of the present embodiment as described above will be described below for a cooling operation and a heating operation.

During the cooling operation, the flow of the refrigerant in the compression heat pump system 1, the engine cooling water, the engine exhaust gas, the refrigerant in the absorption refrigeration system 70, the absorption liquid, the cooling water, and the water in the heat medium fluid circulation path 100 are respectively. Are indicated by solid arrows in FIG.

That is, in the refrigerant circuit 10 of the compression heat pump system 1, a control unit (not shown)
The four-way valve 12 is brought into the circuit connection state shown by the solid line, and the solenoid valve 33 and the electronic expansion valve 17 in the bypass passage 31 are connected.
Is opened, the electronic expansion valve 16 between the outdoor heat exchanger 13 and the receiver 28 is closed, and the receiver 28 and the heat exchanger 1 are closed.
4, the electronic expansion valve 15 is set in a proper throttle state.
In this state, the refrigerant discharged from the compressor 11 passes through the bypass passage 31, releases heat, is condensed and liquefied in the RW heat exchanger 32, and then passes through the electronic expansion valve 17, the receiver 28, and the electronic expansion valve 15. , Where it is expanded, then guided to the heat exchanger 14 to evaporate, further flows through the four-way valve 12 to the suction side line 22, and returns to the compressor 11 via the accumulator 24.

In this case, the heat exchanger 14 serves as an evaporator, and the heat medium fluid 1
Heat is taken from the water in 00. Further, in the conventional compression heat pump system, the refrigerant is circulated so that the outdoor heat exchanger 13 becomes a condenser during the cooling operation, but in the present embodiment, the RW heat exchange is performed instead of the outdoor heat exchanger 13. Vessel 3
Refrigerant is passed through the bypass passage 31 so that 2 becomes a condenser, and the RW heat exchanger 32 gives heat of condensation to the engine cooling water in the cooling water circuit 40.

In the cooling water circuit 40, the heat exchanger 48
Valve 53 and WR heat exchanger 2 in a passage for guiding cooling water to
The solenoid valves 56 of the passages for leading the cooling water to 6 are closed. Also, the solenoid valve 50 in the passage leading to the radiator 44
Is closed at a temperature equal to or higher than a set cooling water temperature (about 90 ° C.) and is opened at a temperature lower than the set cooling water temperature, whereby the amount of cooling water flowing to the radiator 44 is adjusted so that the engine cooling water temperature is maintained in an appropriate range. Solenoid valve 51 of passage 45 for feeding condensed heat
The solenoid valve 52 of the bypass passage 46 is controlled in accordance with the engine coolant temperature. When the coolant temperature is equal to or higher than the set coolant temperature (about 50 ° C.), the solenoid valve 51 is opened and the solenoid valve 52 is closed, so that the heat for absorbing liquid heating is obtained. Cooling water flows to the exchanger 85 side. When the cooling water temperature is lower than the set cooling water temperature, the electromagnetic valve 51 is closed and the electromagnetic valve 52 is opened to flow the cooling water to the bypass passage 46.

The three-way solenoid valve 9 provided in the exhaust passage 9
The exhaust gas is controlled to be guided to the heating section 87 of the regenerator 73.

In the absorption refrigeration system 70, the refrigerant liquid is evaporated in the evaporator 71, and the refrigerant vapor is led to the absorber 72 and absorbed by the absorption liquid. And the refrigerant is evaporated and separated by heating, and the absorbing liquid after the refrigerant separation is sent to the absorber 72, while the separated refrigerant vapor is condensed and liquefied in the condenser 74 and then sent to the evaporator 71. Is repeated. Then, the water in the heat transfer tube 75 is cooled by the evaporation of the refrigerant in the evaporator 71.

The three-way solenoid valve 104 of the heat medium fluid circulation path 100
Is controlled so that water flows into the evaporator 71 when the absorption refrigeration system 70 is operated during cooling.

Therefore, when both the compression heat pump system 1 and the absorption refrigeration system 70 are operating during the cooling operation, the water flowing through the heat medium fluid circulation path 100 is pre-cooled by the evaporator 71 of the absorption refrigeration system 70. Then, after being guided to the heat exchanger 14 of the compression heat pump system 1 (heat exchanger functioning as an evaporator during cooling) and further cooled, the heat is sent to the indoor heat exchanger 101 to cool the room. Thus, the evaporator 71 of the absorption refrigeration system 70 and the heat exchanger 1 of the compression heat pump system 1
Since the water is cooled in two stages in step 4, the cooling effect is sufficiently enhanced.

Also, during this cooling operation, the heat of condensation generated in the refrigerant circuit 10 of the compression heat pump system 1 is recovered by the RW heat exchanger 32, and the absorption liquid of the absorption refrigeration system 70 is used with the engine cooling water as a medium. It is sent to the heat exchanger 85 for heating. Therefore, in the compression heat pump system 1, the condensed heat, which was conventionally discarded at the time of cooling, is effectively used for heating the absorption liquid sent from the absorber 72 to the regenerator 73 in the absorption refrigeration system 70. Then, the temperature of the absorbent flowing into the regenerator 73 is increased by the heating in the heat exchanger 85 for heating the absorbent, and the evaporation of the refrigerant in the regenerator 73 is promoted.

Further, in this embodiment, the water jacket 7 and the exhaust gas heat exchanger 8 are added to the heat of condensation by the cooling water of the cooling water circuit 40 of the compression heat pump system 1.
, The heat of the engine is also recovered, and the heat of condensation and the heat of the engine are sent to the heat exchanger 85 for heating the absorbent, so that the absorbent is heated more effectively. Furthermore, the exhaust gas of the engine is supplied to the regenerator 7 of the absorption refrigeration system 70.
3 and is guided to the heating section 87 of the regenerator 7 by the heat of the exhaust gas.
The absorption liquid in 3 is heated, and the refrigerant is evaporated. In this manner, the heat of condensation and the engine exhaust heat and the heat of the engine exhaust gas recovered by the cooling water in the compression heat pump system 1 are effectively used as the heat source of the absorption refrigeration system 70.

When the load on the indoor unit is small and the air conditioning is low during cooling, the operation of the absorption refrigeration system 70 is stopped, and only the compression heat pump system 1 having a high COP (coefficient of performance) is operated. At this time, the heat medium fluid circulation path 1
The three-way solenoid valve 104 is controlled so that water flows through the bypass passage 105.

During the heating operation, the refrigerant in the compression heat pump system 1, the engine cooling water, the engine exhaust gas, the refrigerant in the absorption refrigeration system 70, the absorbing liquid, the cooling water, and the water in the heat medium fluid circulation path 100 are respectively provided. 1 is indicated by a broken-line arrow in FIG.

That is, in the refrigerant circuit 10 of the compression heat pump system 1, a control unit (not shown)
The four-way valve 12 is brought into the circuit connection state shown by the broken line, and the solenoid valve 33 and the electronic expansion valve 17 in the bypass passage 31 are connected.
Is closed, the electronic expansion valve 15 between the heat exchanger 14 and the receiver 28 is opened, and the receiver 28 and the outdoor heat exchanger 1
The electronic expansion valve 16 between the positions 3 and 3 is set in an appropriate throttle state.
In this state, the refrigerant discharged from the compressor 11 is supplied to the four-way valve 12, the heat exchanger 14, the electronic expansion valve 15, and the receiver 2
8, the electronic expansion valve 16, the outdoor heat exchanger 13, the WR heat exchanger 26, and the four-way valve 12 are returned to the compressor 11 in this order. In this case, the heat exchanger 14 serves as a condenser, and heat is given to water in the heat medium fluid 100 by condensation of the refrigerant in the heat exchanger 14. The outdoor heat exchanger 13 serves as an evaporator, where the refrigerant absorbs heat and evaporates.

The three-way solenoid valve 9 provided in the exhaust passage 5 allows the exhaust gas to pass through the main passage 5a to the exhaust gas heat exchanger 8
In the cooling water circuit 40, the electromagnetic valve 56 in the passage for guiding the cooling water to the WR heat exchanger 26 is opened, so that the water jacket 7 and the exhaust gas heat exchanger 8 The warm water that has recovered the exhaust heat is W
-R is introduced to the heat exchanger 26 to heat the low-pressure refrigerant. Thereby, heating performance is improved.

Further, when the temperature of the engine cooling water becomes equal to or higher than the set temperature, the solenoid valve 53 is opened, so that the warm water having recovered the engine exhaust heat by the water jacket 7 and the exhaust gas heat exchanger 8 is conducted to the heat exchanger 48. I will

The solenoid valve 50 in the cooling water circuit 40 is controlled in the same manner as in cooling, and the solenoid valves 52 and 53 are closed.

The absorption refrigeration system 70 includes a pump 80,
The operation is stopped, for example, by stopping 83 and 92.

The three-way solenoid valve 104 of the heat medium fluid circulation path 100
Is controlled so that water flows through the bypass passage 105 without flowing through the heat transfer tube 75 in the evaporator 71.

In such a control state during the heating operation, water flowing through the heat medium fluid circulation path 100 is guided to the heat exchanger 14 (a heat exchanger functioning as a condenser during heating) of the compression heat pump system 1. If the temperature of the engine coolant is high and the temperature of the engine coolant is high, it is also heated by the engine exhaust heat in the heat exchanger 48 and then sent to the indoor heat exchanger 101 to heat the room. Thus, the heating effect is sufficiently enhanced.

The specific structure of the device of the present invention is not limited to the above embodiment (first embodiment), but can be variously changed.
Another embodiment will be described with reference to FIGS.

In the second embodiment shown in FIG. 2, as a structure for guiding the heat of condensation generated in the refrigerant circuit 10 of the compression heat pump system 1 to the absorption refrigeration system 70, the bypass passage 31 'of the refrigerant circuit 10 is used to condense heat. A supply passage is formed, and the refrigerant in the refrigerant circuit 10 is directly led to the heat exchanger 85A for heating the absorbent by the passage 31 '.

That is, the compression heat pump system 1
The bypass passage 31 ′ branched from the discharge line 21 of the refrigerant circuit 10 of the refrigerant circuit 10 is connected to the absorber 72 of the absorption refrigeration system 70.
It is formed so as to reach the receiver 28 of the refrigerant circuit 10 via the heat exchanger 85A for heating the absorbing liquid provided in the passage between the heat exchanger 85 and the regenerator 73. The electromagnetic valve 33 and the electronic expansion valve 17 provided in the bypass passage 31 ′ open and close according to the cooling and heating similarly to the first embodiment.

Further, the engine cooling water obtained by recovering the exhaust heat of the engine of the compression heat pump system 1 is led to the heating section 85B of the regenerator 73. That is, the main passage 41 between the exhaust gas heat exchanger 8 and the radiator 44 in the cooling water circuit 40 of the compression heat pump system 1.
The passage 45 ′ branched from the heating unit 85 B of the regenerator 73
Through the main passage 41 between the radiator 44 and the water pump 42. Main passage 41, passage 4
5 ', the solenoid valves 50 to 53 provided in the bypass passage 46 and the passage 47 open and close as in the first embodiment.

According to this embodiment, during the cooling operation,
When the electronic expansion valve 17 and the solenoid valve 33 are opened,
The refrigerant in the refrigerant circuit 10 is guided to the heat exchanger 85A for heating the absorption liquid, where the heat of condensation of the refrigerant is directly supplied to heat the absorption liquid. When the solenoid valve 51 is opened, the hot water recovered from the engine exhaust heat by the water jacket 7 and the exhaust gas heat exchanger 8 is guided to the heating section 85B of the regenerator 73,
Heating within 3 is performed. Other structures, operations and actions according to cooling and heating are the same as those of the first embodiment.

In the third embodiment shown in FIG. 3, different from the first embodiment, 15 is an electronic expansion valve (opening adjustment is controlled in accordance with the load) which serves as a throttle for both cooling and heating. Solenoid valve opened during cooling, and 17 opened during heating,
An electromagnetic valve that is closed during cooling and a refrigerant circuit 1
0, the WR heat exchanger 26 is omitted, and instead, the heat exchangers 111 and 11 for exchanging heat with the stored liquid-phase low-pressure low-temperature refrigerant are stored in the accumulator 24.
2 are provided. The heat exchanger 111 includes the cooling water circuit 4
When the passage 114 is opened to the cooling water circuit 40 by the three-way solenoid valve 113 through the passage 114 branched from the zero through the three-way solenoid valve 113, the hot water recovered from the engine exhaust heat is supplied to the heat exchanger. 111.

Regarding the engine exhaust heat, during the heating operation, the first
Similarly to the first embodiment, the low-pressure refrigerant is recovered without using the exhaust heat of the engine for heating the regenerator 73 and for heating the absorbing liquid. You may make it collect | recover. As a result, the output of the engine 3 for driving the compressor 11 can be reduced to reduce fuel consumption. Then, the remaining portion of the engine exhaust heat is used for heating the regenerator 73 and for heating the absorbent.

The heat exchanger 112 is connected to the R
During the passage, the liquefied refrigerant passing through the -W heat exchanger 32 is further cooled by a low-temperature liquid refrigerant in the accumulator 24 to be in a supercooled state, thereby increasing the efficiency of the refrigeration cycle on the compression heat pump system 1 side.

According to this embodiment, the accumulator 2
4 can reduce the stagnation of the liquid-phase refrigerant. Other structures, operations, and operations are the same as those of the first embodiment.

In the fourth embodiment shown in FIG. 4, the absorption refrigeration system 70 has a double effect cycle, and the absorption refrigeration system 70 is operated even during heating.

In this figure, the evaporator 71 and the absorber 7
2. The configurations of the condenser 74, the heat transfer tube 75, the cooling water circuit 90, and the like are the same as those in the first embodiment, but two high temperature regenerators 73A and 73B are provided as regenerators. High temperature regenerator 73 from absorber 72 via pump 83
A heat exchanger 8 for heating the absorbing solution
5A, a low-temperature-side solution heat exchanger 121 and a high-temperature-side solution heat exchanger 122 are provided. Also, a passage 123 branched from between the heat exchangers 85A and 121 in the dilute solution passage 82.
Is connected to the evaporator 71, and the heat exchanger 121,
A passage 124 branched from between the passages 122 is connected to the low-temperature regenerator 73B. The passages 123 and 124 are provided with solenoid valves 125 and 126, respectively.

The low-temperature regenerator 73B has a heating section 8 through which hot water from which engine exhaust heat has been recovered is guided through a passage 45 '.
5B is provided.

The high-temperature regenerator 73A is provided with a heating section 87 through which the exhaust gas of the engine of the compression heat pump 1 is guided through the exhaust gas passage 5b, and is provided with a burner 127. A fuel gas passage having a control valve 128 is connected. In this high temperature regenerator 73A, a refrigerant passage 130 for leading the refrigerant separated by evaporation and a passage 1 for leading the absorbing liquid after the refrigerant separation are provided.
31 are connected. After passing through the low temperature regenerator 73B, the refrigerant passage 130 reaches the condenser 74. Further, the low-temperature regenerator 73B is connected to a refrigerant vapor passage 132 for leading out the refrigerant evaporated and separated by the regenerator 73B and a passage 133 for leading out the absorbent after the refrigerant separation. The condenser 74 has been reached.

The passage 131 passes through the high-temperature solution heat exchanger 122 and then passes through the passage 131 and the passage 13.
After the three have merged, they have passed through the low-temperature solution heat exchanger 121 and reached the absorber 72.

In order to send a part of the refrigerant vapor from the high-temperature regenerator 73A to the evaporator 71 during heating to make the evaporator 71 function as a boiler, a passage 134 branched from the refrigerant passage 130 bypasses the condenser 74. It is connected to the evaporator 71. The passage 134 is provided with an electromagnetic valve 135 that is opened only when the absorption refrigeration system 70 is operating during heating.

On the other hand, in the compression heat pump system 1, instead of the heat exchanger 14 in the first embodiment, a heat exchanger 14A serving as an evaporator during cooling and a heat exchanger 14B serving as a condenser during heating are provided. Separately provided, these are connected in parallel between the expansion valve 15 and the four-way valve 12, and the refrigerant flow state is set so that the refrigerant flows to the heat exchanger 14A during cooling and to the heat exchanger 14B during heating. Switching solenoid valves 141 and 142 are provided.

The heat exchangers 14 A and 14 B exchange heat between the refrigerant flowing through the refrigerant circuit 10 and the water flowing through the heat medium fluid circulation path 100. As an arrangement of the heat exchangers 14A and 14B, the heat exchanger 14A is located downstream of the heat transfer tube 75 provided in the evaporator 71 of the absorption refrigeration system 70 (heat transfer tube 7).
5 in the middle of the path from the first heat exchanger 5 to the indoor heat exchanger 101), and the heat exchanger 14B is located upstream of the heat transfer tube 75. The heat exchanger 48 for guiding the engine cooling water
Is configured to supply heat to water in the heat medium fluid circulation path 100 downstream of the heat transfer tube 75.

The structures of the compression heat pump system 1 and the absorption refrigeration system 70 are the same as those of the first embodiment except for the points described above.

According to this embodiment, during the cooling operation, in the compression heat pump system 1, the four-way valve 12 is set to the state shown by the solid line, and the solenoid valve 33 and the electronic expansion valve 17
The electromagnetic expansion valve 141 is opened, the electronic expansion valve 16 and the electromagnetic valve 142 are closed, and the electronic expansion valve 15 is brought into an appropriate throttle state. Thereby, the refrigerant discharged from the compressor 11 returns to the compressor 11 via the bypass passage 31 ', the heat exchanger 85A for absorbing liquid heating, the receiver 28, the electronic expansion valve 15, the heat exchanger 14A, and the four-way valve 12. The heat exchanger 85A serves as a condenser to supply heat of condensation while the heat exchanger 14A serves as an evaporator, thereby removing heat from water in the heat medium fluid circulation path 100. .

When the absorption refrigeration system 70 is operating during the cooling operation, the solenoid valve 125 and the solenoid valve 135 are closed, and the solenoid valve 126 is opened. An absorption cycle similar to that of the absorption refrigeration system 70 shown in one embodiment is performed. However, the refrigerant is evaporated and separated by the high-temperature regenerator 73A and the refrigerant vapor is led out to the passage 130, and the refrigerant in the dilute solution is heated and separated by the heat of condensation of the refrigerant in the passage 130 by the low-temperature regenerator 73B. The refrigerant vapor led to the passage 132 from the low-temperature regenerator 73B and the refrigerant in the passage 130 are sent to the condenser 74, while the refrigerant separation led to the passages 131 and 133 from the high-temperature regenerator 73A and the low-temperature regenerator 73B. The later absorbing liquid is sent to the absorber 72.

In this way, two-stage heat treatment is performed by the high-temperature regenerator 73A and the low-temperature regenerator 73B. Further, while the absorbing liquid after the absorption of the refrigerant flows through the dilute solution passage 82 toward the regenerators 73A and 73B, the heat exchangers 85A and 85A
Heated in multiple stages at 21 and 122,
A and 73B are heated by the heating units 85B and 87 using the engine exhaust heat and the heat of the engine exhaust gas. Further, if necessary, the burner 127 is also heated. Therefore, a highly efficient and high performance driving state can be obtained.

During the cooling operation, when both the systems 1 and 70 are operating, the water flowing through the heat medium fluid circulation path 100 is pre-cooled by the evaporator 71 of the absorption refrigeration system 70, and then the compressor Heat pump system 1
Is cooled by the heat exchanger 14A of the indoor heat exchanger 10
1 to cool the room is the same as in the first embodiment.

When the air conditioning is under a low load, the operation of the absorption refrigeration system 70 is stopped, and only the compression heat pump system 1 having a high COP (coefficient of performance) is operated. Reference numeral 104 denotes a state in which water flows through the bypass passage 105. Then, when the load becomes equal to or more than the air conditioning medium load, the three-way solenoid valve 104 is switched to a state in which water flows through the heat transfer tube 75 of the evaporator 71, and the absorption refrigeration system 70 is operated. However, in the air-conditioning medium load, the high temperature regenerator 73A is heated only by the exhaust gas led to the heating unit 87 without using the burner 127,
The burner 127 is used only when the air conditioning high load is reached. In this way, operation is performed with high efficiency while saving fuel as much as possible.

On the other hand, in the compression heat pump system 1 during the heating operation, the four-way valve 12 is in the state shown by the broken line, and the solenoid valve 33, the electronic expansion valve 17 and the solenoid valve 141
Are closed, the electronic expansion valve 15 and the solenoid valve 142 are each opened, and the electronic expansion valve 16 is brought into an appropriate throttle state. Thereby, the refrigerant discharged from the compressor 11 passes through the four-way valve 12, the heat exchanger 14B, the receiver 28, the electronic expansion valve 15, the outdoor heat exchanger 13, the WR heat exchanger 26, and the four-way valve 12, and Circulate back to 11 and heat exchanger 1
4B serves as a condenser to supply heat of condensation to water in the heat medium fluid circulation path 100.

Further, when the temperature of the engine cooling water becomes equal to or higher than the set temperature, the solenoid valve 53 is opened, so that the hot water from which the engine exhaust heat is recovered by the water jacket 7 and the exhaust gas heat exchanger 8 is guided to the heat exchanger 48. It is also heated by engine exhaust heat.

In this embodiment, the absorption refrigeration system 70 is also capable of heating operation. During the heating operation, the solenoid valve 125 and the solenoid valve 135 are opened, the solenoid valve 126 is closed, and the burner 127 is turned on. High temperature regenerator 73
A is heated. As a result, high-temperature refrigerant vapor is sent from the high-temperature regenerator 73A to the evaporator 71 through the passage 134, and the refrigerant vapor heats the water in the heat transfer tube 75. The refrigerant vapor sent to the evaporator 71 heats the water passing through the heat transfer tube 75, while being cooled and partially liquefied,
It is mixed with a part of the diluted solution absorbing liquid guided to the evaporator 71 through the passage 123. The diluted solution absorbing liquid diluted by absorbing the vapor reaches the absorber 72 through the communication path 136 between the evaporator 71 and the absorber 72. On the other hand, the non-liquefied refrigerant is guided to the absorber 72 through the refrigerant vapor passage 78.

In a state where both systems 1 and 70 are operated during heating, water flowing through the heat medium fluid circulation path 100 is supplied to the heat exchanger 14B of the compression heat pump system 1.
And then evaporator 7 of absorption refrigeration system 70
1, when the temperature of the engine cooling water is high, it is also heated by the engine cooling water in the heat exchanger 48 and then sent to the indoor heat exchanger 101 to heat the room.

When the air conditioning is under a low load, the heating medium fluid 100
In the state where the three-way solenoid valve 104 is set to flow water through the bypass passage 105, heating is performed by operating only the compression heat pump system 1, and when the air conditioning is under a high load, the three-way solenoid valve 104 is turned on by the evaporator 71. The absorption refrigeration system 70 may be operated as described above with water flowing through the heat pipe 75.

In the fourth embodiment, the heating by the absorption refrigeration system 70 is performed by the evaporator method. In addition, the heating water production cycle by the absorption refrigeration system is the absorber / evaporator method. Hot water heat exchanger systems are known, and these systems may be employed.

[0091]

As described above, the present invention relates to a composite heat transfer device in which at least cooling of a heat transfer fluid circulating in a heat transfer fluid circulation path is performed by a compression heat transfer device and an absorption heat transfer device. The refrigerant condensing heat generated in the refrigerant circuit of the compression heat transfer device is guided to the absorption heat transfer device, and the absorbing liquid flowing from the absorber of the absorption heat transfer device to the regenerator is heated by the condensation heat. Therefore, when cooling or freezing is performed, the performance of cooling or the like can be improved by the compression heat transfer device and the absorption heat transfer device, and the condensation heat generated in the compression heat transfer device is absorbed by the absorption heat transfer device. It can be effectively used for heating the absorbing liquid in the moving device. Therefore, the heat of condensation is not wastefully released during cooling or the like, and the energy use efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a first embodiment of a composite heat transfer device according to the present invention.

FIG. 2 is a circuit diagram showing a second embodiment of the composite heat transfer device of the present invention.

FIG. 3 is a circuit diagram showing a third embodiment of the composite heat transfer device of the present invention.

FIG. 4 is a circuit diagram showing a fourth embodiment of the composite heat transfer device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compression heat pump system 2 Engine 7 Water jacket 8 Exhaust gas heat exchanger 10 Refrigerant circuit 11 Compressor 13 Outdoor heat exchanger 14 Heat exchanger 31 Bypass passage 32 RW heat exchanger 40 Cooling water circuit 45 Condensed heat supply Passage 48 Heat exchanger 70 Absorption refrigeration system 71 Evaporator 72 Absorber 73 Regenerator 74 Condenser 85 Heat exchanger for heating the absorbent 87 Heating section of regenerator 100 Heat medium fluid circulation path 101 Indoor heat exchanger

Claims (10)

[Claims] 1. A compression type heat transfer device for circulating a refrigerant by a compressor, and an absorption type heat transfer device, wherein a heat medium fluid circulation path including an indoor heat exchanger is connected to the compression type heat transfer device and an absorption type heat transfer device. A composite heat transfer device provided so as to cover at least the heat transfer fluid and circulating the heat transfer fluid in the heat transfer fluid circulation path by the compression heat transfer device and the absorption heat transfer device. A condensed heat supply passage for guiding the refrigerant condensing heat generated in the refrigerant circuit of the device to the absorption type heat transfer device, and an absorption liquid flowing from the absorber of the absorption type heat transfer device to the regenerator by the condensed heat supply passage. A composite heat transfer device comprising: an absorption liquid heating means for heating the refrigerant with the refrigerant condensation heat. 2. The condensing heat supply passage circulates water, and transfers the water passing through a heat exchanger for condensing heat recovery for recovering the refrigerant condensing heat of the compression heat transfer device to an absorption heat transfer device. The composite heat transfer device according to claim 1, wherein the condensed heat supply passage is configured to guide the condensed heat. 3. The compression heat transfer device according to claim 2, wherein the compressor is driven by a water-cooled engine, and water circulating in the condensed heat supply passage is engine cooling water. Combined heat transfer equipment. 4. A condensed heat supply passage is formed so that engine cooling water that has passed through a heat exchanger for condensed heat recovery and an exhaust gas heat exchanger for recovering heat of exhaust gas from an engine is guided to an absorption type heat transfer device. The composite heat transfer device according to claim 3, wherein: 5. A condensed heat supply passage is formed so that engine cooling water passing through a heat exchanger for condensed heat recovery and a cooling water jacket of the engine is guided to an absorption type heat transfer device. Item 4. The composite heat transfer device according to Item 3. 6. The condensing heat transfer passage according to claim 1, wherein the high-temperature and high-pressure refrigerant in the refrigerant circuit of the compression heat transfer device is guided to the absorption liquid heating means of the absorption heat transfer device. Combined heat transfer equipment. 7. A cooling apparatus according to claim 1, wherein during cooling or freezing, the heat transfer fluid circulating in the heat transfer fluid circulation path is cooled by the evaporator of the compression heat transfer device and the evaporator of the absorption heat transfer device. The composite heat transfer device according to any one of claims 1 to 6, wherein: 8. A combined heat transfer device constituting an air conditioner capable of cooling and heating, wherein condensing heat of the compression heat transfer device is supplied to the absorption liquid heating means of the absorption heat transfer device by the condensing heat transfer passage during cooling. The combined heat transfer device according to any one of claims 1 to 7, wherein during the heating, the condensing heat of the compression heat transfer device is sent to the indoor heat exchanger during heating. 9. The heating apparatus according to claim 1, wherein the heating medium fluid in the heat medium fluid circulation path is heated by the condenser of the compression heat transfer device during heating, and the heated heat medium fluid is guided to the indoor heat exchanger. The composite heat transfer device according to claim 8, wherein 10. During heating, the heat medium fluid in the heat medium fluid circulation path is heated by the exhaust heat of the engine driven compression heat transfer device, and the heated heat medium fluid is guided to the indoor heat exchanger. The composite heat transfer device according to claim 8, wherein: