JPH0338512B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus in which a compressor of a heat pump is driven by an internal combustion engine, and the exhaust heat of the heat pump and the internal combustion engine can be used for hot water supply, space heating, etc. Regarding.

FIG. 1 is a system diagram of the prior art. The compressor 2 of the heat pump 1 is driven by an internal combustion engine 3. During heating, the refrigerant from the compressor 2 is guided from the pipe 4 through the four-way switching valve 5 and the pipe 6 to the heat exchanger 7, where it is condensed, and the refrigerant condensed here is transferred from the pipe 8 to the heat exchanger 9. It is then evaporated and returned to the pipe 10.
From there, it is led to the compressor 2 through a pipe line 14 via a switching valve 5. The heat medium heated by heat exchange in the heat exchanger 7 is led to an air conditioner 13 provided in the room via pipes 11 and 12, and is circulated by a pump 24. Warm air is blown into the room from the air conditioner 13.

During cooling, the refrigerant from the compressor 2 passes from the pipe 4 through the switching valve 5 and the pipe 10, condenses in the heat exchanger 9, is led from the pipe 8 to the heat exchanger 7, evaporates, and is transferred to the pipe 6, It is led to the compressor 2 via the switching valve 5 and the pipe line 14. The heat medium from the pipe line 11 cooled in the heat exchanger 7 is guided from the pipe line 12 to the air conditioner 13 and circulated, thereby blowing cold air into the room.

A cooler 15 for cooling the cylinders of the internal combustion engine 3 and a heat exchanger 17 provided in the middle of the combustion exhaust gas passage 16 are connected in series. The heat medium is circulated through the pump 20 and the pump 20. An auxiliary radiator 21 is connected to the switching valve 19, and this auxiliary radiator 2
The cooled heat transfer medium from 1 is led to pump 20. In the heat exchanger 18, water such as tap water supplied through the pipe line 22 is taken out from the pipe line 23 as hot water.

In such prior art, the temperature of the heat medium led out from the heat exchanger 7 is detected by the temperature detector 60 provided in the pipe line 12, and the temperature of the heat medium led out from the heat exchanger 7 is detected by the temperature detector 60, and the temperature is transferred to the internal combustion engine 3 so that this temperature becomes a predetermined value. Controls the flow rate of fuel supplied. For example, during heating, if the temperature detector 60 detects that the temperature of the heat medium is high, the flow rate of fuel supplied to the internal combustion engine 3 is reduced to reduce the output of the internal combustion engine 3. Since such control of the internal combustion engine 3 is performed regardless of the flow rate of hot water led out from the pipe 23, the temperature of the hot water changes undesirably. Therefore, when the temperature detector 60 in the pipe line 12 detects that the temperature of the heat medium has become high and the output of the internal combustion engine 3 decreases, the hot water supply temperature is sufficient even though there is a hot water supply load. It may happen that you are not able to obtain the desired results. Further, when the temperature of the heat medium detected by the temperature detector 60 is low, the fuel flow rate of the internal combustion engine 3 is increased,
As a result, the temperature of the heat medium heated by the heat exchangers 15 and 17 increases. Therefore, in order to bring the tapping temperature to a predetermined value, it is necessary to guide a portion of the heat medium from the heat exchanger 18 to the auxiliary cooler 21 via the switching valve 19 to radiate heat. Therefore, the exhaust heat of the internal combustion engine 3 is wasted.

The object of the present invention is to provide a device equipped with a heat pump driven by an internal combustion engine, which is able to achieve a desired value of heat load and maintain a high total thermal efficiency at any load. .

In order to achieve the above object, the present invention operates a heat pump by driving a compressor with an internal combustion engine,
In a device equipped with a heat pump driven by an internal combustion engine that circulates the heat medium heated by the heat exchanger of the heat pump to the air conditioner, the heat medium is passed from the heat exchanger 7 to the air conditioner. 13
The first passage 12, 43 supplies the air to the heat exchanger 7, and the second passage 40, conversely, supplies the air from the air conditioner 13 to the heat exchanger 7.
11 to form a circulation path, and the first path 12, 4
A first on-off valve 42 is interposed in the second passage 40,1.
1 is provided with a second on-off valve 41 and a first pump 24 facing the heat exchanger 7 between the second on-off valve 41 and the air conditioner 13, and the heat exchanger of the first passages 12 and 43 7 and the first on-off valve 42, one end is connected between the second passage 11, 4
The third passage 32, 36, 25, 26, 3 whose other end is connected between the heat exchanger 7 of 0a and the second on-off valve 41
0,47 is provided, and this third path 32,36,25,26,30,4
The heat medium from the heat exchanger 7 is supplied to 7, and heat exchangers 15 and 17 provided in the internal combustion engine for heating the heat medium from the upstream side to the downstream side through the third on-off valve 33, and the hot water supply. Heat exchanger 18, heating heat exchanger 2
7. The second pump 29 and the fourth on-off valve 31 are interposed in this order, and the first temperature detector 4 is located downstream of the fourth on-off valve 31 in the third passages 32, 36, 25, 26, 30, 47.
8, and a processing circuit 49 that controls the fuel flow rate of the internal combustion engine in response to the output of the first temperature sensor 48.
A fifth on-off valve 52 is provided which connects between the third on-off valve 33 and the heat exchangers 15, 17 and between the second pump 29 and the fourth on-off valve 31, one end of which connects the first on-off valve 33 and the heat exchanger 15, 17, A first pump 24 and a second on-off valve 41 are connected to the first passages 12, 43 between the valve 42 and the air conditioner 13, and the other end is the first passage 11, 40a.
The fourth path 40, 38, 37, 4 connected between
4 is formed, and this fourth path 40, 38, 37, 44 is supplied with the heat medium from the first pump 24, and from the upstream side to the downstream side is a sixth on-off valve 45, a heating heat exchanger 2
7 and the seventh on-off valve 39 are interposed in this order,
A second temperature detector 50 is provided to detect the heat medium temperature at the outlet of the heating heat exchanger in the fourth path, and during heating, the third on-off valve 33, the fourth on-off valve 31,
The sixth opening/closing valve 45 and the seventh opening/closing valve 39 are opened and the first opening/closing valve 42, the second opening valve 41 and the fifth opening valve 52 are closed.
An internal combustion engine characterized in that the on-off valve 41 and the fifth on-off valve 52 are opened, and the third on-off valve 33, the fourth on-off valve 31, the sixth on-off valve 45 and the seventh on-off valve 39 are closed. This device includes a driven heat pump.

The present invention also provides a compressor driven by the internal combustion engine, which operates the heat pump, and circulates the heat medium heated by the heat exchanger of the heat pump to the air conditioner. In the apparatus equipped with a heat pump, the heat medium is transferred from the heat exchanger 7 to the air conditioner 13.
The first passage 12, 43 supplies the air to the heat exchanger 7, and the second passage 40, conversely, supplies the air from the air conditioner 13 to the heat exchanger 7.
11 to form a circulation path, and the first path 12, 4
A first on-off valve 42 is interposed in the second passage 40,1.
1 is provided with a second on-off valve 41 and a first pump 24 facing the heat exchanger 7 between the second on-off valve 41 and the air conditioner 13, and the heat exchanger of the first passages 12 and 43 7 and the first on-off valve 42, one end is connected between the second passage 11, 4
A third passage 36, 25, 47 is provided between the heat exchanger 7 of 0a and the second on-off valve 41, and the other end is connected to the third passage 36, 25, 47. The heat medium is supplied from the upstream side to the downstream side through the third on-off valve 33, and heat exchangers 15 and 17 are provided in the internal combustion engine to heat the heat medium, and a heating heat exchanger that also serves as a hot water heat exchanger. vessel 18, second pump 2
9 and a fourth on-off valve 31 are interposed in this order, and a fifth on-off valve connects between the third on-off valve 33 and the heat exchangers 15 and 17, and between the second pump 29 and the fourth on-off valve 31. An on-off valve 52 is provided, one end of which is connected to the first passages 12, 43 between the first on-off valve 42 and the air conditioner 13, and the other end connected to the first pump 24 and the second on-off valve of the first passage 11, 40a. valve 41
The fourth path 40, 38, 37, 4 connected between
4 is formed, and this fourth path 40, 38, 37, 44 is connected to the first
The heat medium from the pump 24 is supplied, and the sixth on-off valve 45 and the heating heat exchanger 18 are supplied from the upstream side to the downstream side.
and a seventh on-off valve 39 are interposed in this order, and a temperature detector 57 for detecting the heat medium temperature at the outlet of the heating heat exchanger in the fourth path is provided. A bypass path is formed that connects the upstream and downstream sides of the exchanger 18, and during heating, the third on-off valve 33, the fourth on-off valve 31,
The sixth opening/closing valve 45 and the seventh opening/closing valve 39 are opened and the first opening/closing valve 42, the second opening valve 41 and the fifth opening valve 52 are closed.
An internal combustion engine characterized in that the on-off valve 41 and the fifth on-off valve 52 are opened, and the third on-off valve 33, the fourth on-off valve 31, the sixth on-off valve 45 and the seventh on-off valve 39 are closed. This device includes a driven heat pump.

FIG. 2 is an overall system diagram of an embodiment of the present invention. Corresponding parts of the previous embodiments are given the same reference numerals. The compressor 2 of the heat pump 1 is driven by an internal combustion engine 3. During heating, the refrigerant from the compressor 2 is transferred from the pipe 4 to the four-way switching valve 5 and the pipe 6.
It is led to a heat exchanger 7 through a pipe 8, where it is condensed, and then led to a heat exchanger 9 through a pipe line 8, where it is evaporated, and then guided from a pipe line 10 through a four-way switching valve 5 and a pipe line 14 to a compressor 2. . Heat exchanger 15 provided in internal combustion engine 3
The heat exchanger 17 provided in the exhaust gas path 16 of the internal combustion engine 3 is connected in series, and the heated heat medium is guided from the pipe line 25 to the heat exchanger 18, and further from the pipe line 26 for heat exchange. The heat exchanger 27 passes through a three-way switching valve 28, a pump 29, a conduit 30, an on-off valve 31, and then is led to the heat exchanger 7 via conduits 47 and 11. The heat medium heated in the heat exchanger 7 is guided from the pipe line 32 through the on-off valve 33 and the pipe line 36 to the heat exchanger 15, where it is heated. In the heat exchanger 18 , water such as tap water supplied from a pipe 22 is heated, and hot water is discharged from a pipe 23 .
The heat medium from the pipe 37 is heated in the heat exchanger 27, and the heated heat medium is guided from the pipe 38 to the pipes 40, 43 and the air conditioner 13 via the on-off valve 39. In this air conditioner 13, indoor air is heated by a heat medium, and warm air is blown into the room. Further, by the pump 24, the pipe line 4
4. Heat exchanger 27 via on-off valve 45 and pipe line 37
It will be returned to normal. Open/close valves 41, 42, 52 during heating
is closed.

A temperature detector 48 is provided in the conduit 47, and a processing circuit 49 controls the fuel flow rate of the internal combustion engine 3 based on a signal from the temperature detector 48. When the temperature of the heat medium detected by the temperature detector 48 increases, the processing circuit 49 reduces the fuel flow rate supplied to the internal combustion engine 3. This heat medium is used for heating performed by the air conditioner 13 and hot water supply performed by the heat exchanger 18. Further, the three-way switching valve 28 directs a portion of the heat medium from the pipe line 26 to the pipe line 51 so that the temperature of the heat medium detected by the temperature detector 50 interposed in the pipe line 38 is constant. is bypassed from the heat exchanger 27 to the pump 29 via the switching valve 28, and at this time, the heat exchanger 27 is guided to the pump 29 via the three-way switching valve 28.
9. Decrease the flow rate of the heat transfer medium guided to 9. In this way, the temperature of the heat medium in the conduit 38 can be set to a desired value. In this way, the pipe line 12 of the heat exchanger 7 is directly connected to the heat exchangers 15 and 17, and the pipe line 47 is connected to the pipe line 11, so that
All of the output of the internal combustion engine 3 becomes a heat load, resulting in good efficiency.

When cooling, the refrigerant from the compressor 2 of the heat pump 1 is passed from the four-way switching valve 5 to the pipe line 10.
It is condensed in the heat exchanger 9 via the pipe line 8, evaporated in the heat exchanger 7 through the pipe line 6, passed through the switching valve 5 from the pipe line 6, and guided from the pipe line 14 to the compressor 2. In the heat exchanger 7, the heat medium from the pipe line 11 is cooled and guided from the pipe line 12 through the on-off valve 42 and the pipe line 43 to the air conditioner 13, thereby cooling the indoor air. . The heat medium from the air conditioner 13 is transferred to the pump 24 provided in the pipe line 40.
The air is then guided from the on-off valve 41 to the indoor unit 7 via the conduit 11. The on-off valves 31, 33, 39, and 45 are closed. Pipe lines 30, 36 for supplying hot water
An on-off valve 52 interposed between the two is opened. As a result, the heat medium passing through the pipe line 36 is transferred to the heat exchanger 1.
5 and 17 by the exhaust heat of the internal combustion engine 3, and is heated from the pipe 25 to the heat exchanger 18 and the pipe 26.
From there, it passes through the bypass pipe 51, the three-way switching valve 28, the pump 29, and the on-off valve 52, and is led to the pipe 36 for circulation. This allows the heat exchanger 18
Cooling is possible through the action of

FIG. 3 is a system diagram of another embodiment of the present invention.
This embodiment is similar to the embodiment shown in FIG.
Corresponding parts are given the same reference signs. It should be noted that the bypass line 51, the three-way switching valve 28, and the heat exchanger 27 in the embodiment shown in FIG. Water such as tap water from the pipe 22 is then heated, and hot water is discharged from the pipe 23. The heat medium from the pipe line 37 is heated by using water such as tap water introduced from the pipe line 22 into the heat exchanger 18 as a heat medium.

During heating, the heated heat medium passes from the pipe line 38 to the three-way switching valve 55 and from the pipe line 56 to the on-off valve 3.
You will be led to the 9th side. When the temperature of the heat medium detected by the temperature detector 57 provided in the middle of the pipe line 56 rises, a part of the heat medium led from the pipe line 44 via the on-off valve 45 is removed from the pipe line 58. The heat medium is returned to the conduit 56 via the three-way switching valve 55, thereby making it possible to maintain the temperature of the heat medium in the temperature sensor 57 at a desired value. During this heating, the on-off valves 31, 33, 39, and 45 are open, and the on-off valves 41, 42, and 52 are closed. Further, during cooling, the on-off valves 31, 33, 39, and 45 are closed, and the on-off valves 41, 42, and 52 are opened.

Although in the embodiments described above the invention has been implemented for heating, cooling and hot water heating, it can be widely implemented in conjunction with other heat load applications.

As described above, according to the present invention, the compressor is driven by the internal combustion engine to operate the heat pump, and the heat medium heated by the condenser of the heat pump is further heated by the exhaust heat of the internal combustion engine. The heat medium heated in the condenser can be further heated using the exhaust heat of the internal combustion engine, and this heated heat medium is sent to the water heater, so hot water at a high temperature can be obtained. It will be done. Furthermore, this heat medium is sent to a heating heat exchanger and used as a heating source, and the heat medium heated by this heating source is sent to the air conditioner at a predetermined temperature by a temperature detector. The outlet temperature of the air conditioner can be maintained at a desired constant temperature.

Further, since the fuel flow rate to the internal combustion engine can be controlled and the temperature of the heat medium supplied to the water heater can be kept constant, the hot water supply temperature is constant. In this way, heating
Regardless of the rate at which a plurality of different heat loads such as hot water supply fluctuate, the device can always operate efficiently and can respond to a desired plurality of heat loads.

To use the device of the present invention for cooling, switching can be easily performed by opening the first and second on-off valves and closing the third, fourth, sixth, and seventh on-off valves, and the device can be easily switched even during cooling. By operating the valve to open the bypass passage and opening the fifth release valve, hot water supply will not be affected.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of the prior art, FIG. 2 is an overall system diagram of one embodiment of the present invention, and FIG. 3 is a system diagram of another embodiment of the present invention. 1... Heat pump, 2... Compressor, 3... Internal combustion engine, 5... Four-way switching valve, 7, 9, 17, 18, 27
...Heat exchanger, 13...Air conditioner, 24, 29...
Pump, 28, 55... Three-way switching valve, 31, 33,
39, 41, 42, 52...Opening/closing valve.

Claims (1)

[Claims] 1. An internal combustion engine that drives a compressor to operate a heat pump, and circulates a heat medium heated by a heat exchanger of the heat pump to an air conditioner. In an apparatus including a driven heat pump, the heat medium is transferred from the heat exchanger 7 to the air conditioner 13.
The first passage 12, 43 supplies the air to the heat exchanger 7, and the second passage 40, conversely, supplies the air from the air conditioner 13 to the heat exchanger 7.
11 to form a circulation path, and the first path 12, 4
A first on-off valve 42 is interposed in the second passage 40,1.
1 is provided with a second on-off valve 41 and a first pump 24 facing the heat exchanger 7 between the second on-off valve 41 and the air conditioner 13, and the heat exchanger of the first passages 12 and 43 7 and the first on-off valve 42, one end is connected between the second passage 11, 4
The third passage 32, 36, 25, 26, 3 whose other end is connected between the heat exchanger 7 of 0a and the second on-off valve 41
0,47 is provided, and this third path 32,36,25,26,30,4
The heat medium from the heat exchanger 7 is supplied to 7, and heat exchangers 15 and 17 provided in the internal combustion engine for heating the heat medium from the upstream side to the downstream side through the third on-off valve 33, and the hot water supply. Heat exchanger 18, heating heat exchanger 2
7. The second pump 29 and the fourth on-off valve 31 are interposed in this order, and the first temperature detector 4 is located downstream of the fourth on-off valve 31 in the third passages 32, 36, 25, 26, 30, 47.
8, and a processing circuit 49 that controls the fuel flow rate of the internal combustion engine in response to the output of the first temperature sensor 48.
A fifth on-off valve 52 is provided which connects between the third on-off valve 33 and the heat exchangers 15, 17 and between the second pump 29 and the fourth on-off valve 31, one end of which connects the first on-off valve 33 and the heat exchanger 15, 17, A first pump 24 and a second on-off valve 41 are connected to the first passages 12, 43 between the valve 42 and the air conditioner 13, and the other end is the first passage 11, 40a.
The fourth path 40, 38, 37, 4 connected between
4 is formed, and this fourth path 40, 38, 37, 44 is supplied with the heat medium from the first pump 24, and from the upstream side to the downstream side is a sixth on-off valve 45, a heating heat exchanger 2
7 and the seventh on-off valve 39 are interposed in this order,
A second temperature detector 50 is provided to detect the heat medium temperature at the outlet of the heating heat exchanger in the fourth path, and during heating, the third on-off valve 33, the fourth on-off valve 31,
The sixth opening/closing valve 45 and the seventh opening/closing valve 39 are opened and the first opening/closing valve 42, the second opening valve 41 and the fifth opening valve 52 are closed.
An internal combustion engine characterized in that the on-off valve 41 and the fifth on-off valve 52 are opened, and the third on-off valve 33, the fourth on-off valve 31, the sixth on-off valve 45 and the seventh on-off valve 39 are closed. A device comprising a driven heat pump. 2 Equipped with a heat pump driven by an internal combustion engine, which operates a heat pump by driving a compressor by the internal combustion engine, and circulates the heat medium heated by the heat exchanger of the heat pump to the air conditioner. In the apparatus, the heat medium is transferred from the heat exchanger 7 to the air conditioner 13.
The first passage 12, 43 supplies the air to the heat exchanger 7, and the second passage 40, conversely, supplies the air from the air conditioner 13 to the heat exchanger 7.
11 to form a circulation path, and the first path 12, 4
A first on-off valve 42 is interposed in the second passage 40,1.
1 is provided with a second on-off valve 41 and a first pump 24 facing the heat exchanger 7 between the second on-off valve 41 and the air conditioner 13, and the heat exchanger of the first passages 12 and 43 7 and the first on-off valve 42, one end is connected between the second passage 11, 4
A third passage 36, 25, 47 is provided between the heat exchanger 7 of 0a and the second on-off valve 41, and the other end is connected to the third passage 36, 25, 47. The heat medium is supplied from the upstream side to the downstream side through the third on-off valve 33, and heat exchangers 15 and 17 are provided in the internal combustion engine to heat the heat medium, and a heating heat exchanger that also serves as a hot water heat exchanger. vessel 18, second pump 2
9 and a fourth on-off valve 31 are interposed in this order, and a fifth on-off valve connects between the third on-off valve 33 and the heat exchangers 15 and 17, and between the second pump 29 and the fourth on-off valve 31. An on-off valve 52 is provided, one end of which is connected to the first passages 12, 43 between the first on-off valve 42 and the air conditioner 13, and the other end connected to the first pump 24 and the second on-off valve of the first passage 11, 40a. valve 41
The fourth path 40, 38, 37, 4 connected between
4 is formed, and this fourth path 40, 38, 37, 44 is connected to the first
The heat medium from the pump 24 is supplied, and the sixth on-off valve 45 and the heating heat exchanger 18 are supplied from the upstream side to the downstream side.
and a seventh on-off valve 39 are interposed in this order, and a temperature detector 57 for detecting the heat medium temperature at the outlet of the heating heat exchanger in the fourth path is provided. A bypass path is formed that connects the upstream and downstream sides of the exchanger 18, and during heating, the third on-off valve 33, the fourth on-off valve 31,
The sixth opening/closing valve 45 and the seventh opening/closing valve 39 are opened and the first opening/closing valve 42, the second opening valve 41 and the fifth opening valve 52 are closed.
An internal combustion engine characterized in that the on-off valve 41 and the fifth on-off valve 52 are opened, and the third on-off valve 33, the fourth on-off valve 31, the sixth on-off valve 45 and the seventh on-off valve 39 are closed. A device comprising a driven heat pump.