JP2000146358A - Excess heat utilizing unit for engine driven compression air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excess heat utilizing unit which can deal with only air conditioning or both air conditioning and hot water supply by switching one or both of condensation heat and engine exhaust heat freely and can deal with high temperature hot water supply, floor heating, and the like, through an extra firing function. SOLUTION: An excess heat utilizing unit comprises a boiler section 51 for extra firing the hot water in a hot water storage tank 50, a casing 52 surrounding a part of the boiler section 51 and the hot water storage tank 50, a passage 53 for circulating the hot water in the hot water storage tank 50, a refrigerant passage 55 for interconnecting a refrigerant inlet 4b from an engine driven compression air conditioner and a refrigerant outlet 4a to an air conditioner, a cooling water passage 56 for interconnecting an engine cooling water inlet 4d from the air conditioner and an engine cooling water outlet 4c to the air conditioner, a condensation heat exchanger 41a for heating hot water in the circulation passage with condensation heat of refrigerant in the refrigerant passage, and an exhaust heat exchanger 41b for heating hot water in the circulation passage with exhaust heat of engine cooling water in the cooling water passage 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual heat utilization unit for effectively utilizing condensation heat generated by an engine driven compression air conditioner and exhaust heat of an engine.

[0002]

2. Description of the Related Art Conventionally, for example, a hot water supply device using only exhaust heat of an engine or a floor heating device using condensed heat can be used as a device capable of utilizing residual heat generated by an engine driven compression type air conditioner. There is a device.

[0003]

However, the above-mentioned conventional apparatus can be used by freely switching one or both of the condensing heat and the engine exhaust heat, and can be used by a user who requests only air conditioning or both air conditioning and hot water supply. There are no proposals that can easily respond to various demands, and those that can provide high-temperature hot water supply, floor heating, and the like by a reheating function.

The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a unit for utilizing the residual heat of an engine-driven compression air conditioner capable of meeting the above-mentioned various demands.

[0005]

According to the first aspect of the present invention, a hot water storage tank for storing hot water, a boiler section for reheating hot water in the hot water storage tank, and at least a part of the boiler section and the hot water storage tank are provided. A surrounding casing, a circulation passage for circulating hot water in the hot water storage tank, a refrigerant communicating with a refrigerant inlet for introducing refrigerant from an engine driven compression air conditioner and a refrigerant outlet for discharging the refrigerant to the air conditioner. Aisle and
A cooling water passage which communicates a cooling water inlet into which the engine cooling water is introduced from the air conditioner and a cooling water outlet from which the engine cooling water is led out to the air conditioner, and the heat of condensation of the refrigerant in the refrigerant passage. A condensing heat exchanger for heating hot water in the circulation passage; and a waste heat exchanger for heating hot water in the circulation passage with exhaust heat of engine cooling water in the cooling water passage. It is a unit that uses residual heat of an engine driven compression air conditioner.

According to a second aspect of the present invention, in the first aspect, the circulation passage communicates between an upper portion and a lower portion of the hot water storage tank.
A circulation pump for circulating hot water in the hot water storage tank from an upper portion to a lower portion, wherein the condensing heat exchanger and the exhaust heat exchanger are connected in series between the circulation passage, the refrigerant passage, and the cooling water passage; The boiler section includes a reheating circulation path that circulates hot water in the hot water storage tank by natural convection, and a burner that heats a heat exchange section formed in the middle of the reheating circulation path. And a heating path branched from the downstream side of the heat exchangers in the circulation path, and a hot water supply path taken out from an upper end of the hot water storage tank.

According to a third aspect of the present invention, in the first aspect, the circulation passage communicates between an upper portion and a lower portion of the hot water storage tank.
A circulation pump for circulating hot water in the hot water storage tank from an upper portion to a lower portion, wherein the condensing heat exchanger and the exhaust heat exchanger are connected in series between the circulation passage, the refrigerant passage, and the cooling water passage; And the boiler unit heats a reheating circulation path branched from both heat exchangers downstream of the circulation path, and a heat exchange unit formed in the middle of the reheating circulation path. And at least one of a heating path and a hot water supply path branching off from the downstream side of the reburning circulation path, to enable further reheating of hot water whose temperature has increased due to condensation heat and exhaust heat. And

According to a fourth aspect of the present invention, in the first aspect, the circulation passage communicates between an upper portion and a lower portion of the hot water storage tank.
A circulation pump for circulating hot water in the hot water storage tank from an upper portion to a lower portion, wherein the condensing heat exchanger and the exhaust heat exchanger are connected in series between the circulation passage, the refrigerant passage, and the cooling water passage; And the boiler unit heats a reheating circulation path branched from both heat exchangers downstream of the circulation path, and a heat exchange unit formed in the middle of the reheating circulation path. A burner, a bypass passage communicating between the hot water storage tank and the burner upstream of the reheating circulation passage, and a check valve interposed in the bypass passage and allowing only a flow from the hot water storage tank to the reheating circulation passage. And at least one of the heating path and the hot water supply pipe is branched from the downstream side of the burner in the additional heating circulation path.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a direct heating path for circulating hot water in the hot water storage tank via a heater is provided.

According to a sixth aspect of the present invention, in the first aspect, the circulation passage communicates the upper portion and the lower portion of the hot water storage tank without having a branch passage, and circulates hot water in the hot water storage tank from the upper portion to the lower portion. And a condensing heat exchanger and a waste heat exchanger are arranged in series between the circulation passage, the refrigerant passage, and the cooling water passage. It has a reburning circulation passage for circulating hot water in the hot water storage tank by natural convection, and a burner for heating a heat exchange part formed in the middle of the reheating circulation passage, and a burner downstream of the reheating circulation passage. It is characterized by having at least one of a hot water supply path and a heating path taken out from the side.

According to a seventh aspect of the present invention, in the first aspect, the circulation path is a second path which directly communicates a first path returning from the hot water storage tank through the boiler section to the hot water storage tank, and an upper part and a lower part of the hot water storage tank. A first path, one of the condensing heat exchanger and the exhaust heat exchanger is disposed, a second path is disposed on the other, and the second path is disposed on the second path. The heat exchanger is characterized in that it only maintains the temperature in the hot water storage tank.

[0012]

According to the residual heat utilization unit of the engine driven compression air conditioner according to the first aspect of the present invention, the condensing heat exchanger is provided between the circulation passage of the hot water in the hot water storage tank and the refrigerant passage and the cooling water passage. Since the exhaust heat exchanger is provided, both the condensed heat generated on the engine driven compression air conditioner side and the engine exhaust heat can be effectively used.

[0013] In addition, an outdoor unit of an existing air conditioner includes:
By adding an inlet / outlet for the high-pressure side refrigerant, an inlet / outlet for cooling water that collects engine exhaust heat, and internal piping, and connecting a residual heat utilization unit, existing air conditioners can be easily air-conditioned and hot water supply and floor heating using residual heat. Etc. can be performed. Furthermore, it is possible to arrange the residual heat utilization unit at any position with respect to the outdoor unit,
Even if a large outdoor unit cannot be arranged, by installing a residual heat utilization unit in a separate space and connecting pipes to each other, hot water supply using residual heat can be easily performed in addition to air conditioning.
Floor heating and the like can be performed.

Further, since the boiler section for heating the hot water in the hot water storage tank is provided, even when the heat of condensation and the exhaust heat of the engine are not sufficient, the hot water in the hot water storage tank is reheated by the boiler section to increase the temperature. Hot water supply and heating are possible.

According to the second aspect of the present invention, the condensing heat exchanger and the exhaust heat exchange are connected in series, and the reheating circulation passage of the boiler section is of a natural convection type. Hot water supply and heating are possible, and even when the air conditioner is stopped, hot water supply and heating are possible by reheating.

According to the third aspect of the present invention, the condensing heat exchanger and the exhaust heat exchange are connected in series, and the reheating circulating passage of the boiler section is branched from the downstream sides of the heat exchangers. Therefore, the hot water whose temperature has increased due to the heat of condensation and the exhaust heat of the engine can be further refired, and the hot water supply and heating can be further increased, and the responsiveness of hot water supply and heating can be improved.

According to the fourth aspect of the present invention, since the hot water storage tank and the additional heating circulation path are connected by the bypass path having the check valve, even if the circulation pump of the circulation path is stopped when the air conditioner is stopped, the hot water storage tank can be used. By circulating hot water in the hot water storage tank through the bypass passage and the boiler section, the temperature in the hot water storage tank can be maintained, and hot water supply and heating can be performed by a reheating function.

According to the fifth aspect of the present invention, since the direct heating path for circulating the hot water in the hot water storage tank through the heater is provided, the heating is performed with the large heat capacity of the hot water storage tank. Avoid sudden changes.

According to the sixth aspect of the present invention, the circulation passage communicates between the upper and lower portions of the hot water storage tank without having a branch passage, and the condensing heat exchanger and the exhaust heat exchange communicate with the lubrication passage. Since the heater is installed, the heat of condensation and the exhaust heat of the engine are used only for maintaining the temperature inside the hot water storage tank, and therefore the temperature inside the hot water storage tank can be more reliably maintained at the set temperature. It is possible to reduce the size of the unit and reduce the size of the entire unit that uses residual heat.

According to the seventh aspect of the present invention, the circulation path includes the first path returning from the hot water storage tank to the hot water storage tank through the boiler section and the second path directly connecting the upper part and the lower part of the hot water storage tank. By disposing one of the condensing heat exchanger and the exhaust heat exchanger on the first path and disposing the other on the second path, each of the heat exchangers Since the heat exchangers are independent from the heat exchangers, the heat exchangers are not affected by the other heat exchangers, and the heat-raising ability of each heat exchanger can be sufficiently exhibited.

For example, when the condensing heat exchanger and the exhaust heat exchanger are arranged in the first and second paths, the amount of reheating when the residual heat on the condensing heat side is small, such as at the start of air conditioning, increases. However, the temperature of the hot water storage can be constantly stabilized by the exhaust heat of the engine. On the other hand, when the exhaust heat exchanger and the condensing heat exchanger are arranged in the first and second paths, when the air conditioning is started, etc.
It is possible to reduce the amount of reheating when the residual heat on the condensing heat side is small. Conversely, if it is equipped with a boiler that can secure a sufficient amount of reheating, high hot water supply and heating capacity can be obtained even at the start of air conditioning. Can be

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 are diagrams for explaining a residual heat unit of an engine driven compression type air conditioner according to a first embodiment of the invention of claims 1 and 2, FIG. 1 is a circuit configuration diagram of an outdoor unit of the air conditioner, 2 is a circuit configuration diagram of the indoor unit and the residual heat utilization unit of the air conditioner, FIG. 3 is a circuit configuration diagram of the residual heat utilization unit, and FIG. 4 is a block configuration diagram of the control device.

In FIG. 1, reference numeral 1 denotes an engine-driven compression air conditioner of the present embodiment. The air conditioner 1 has a configuration in which an outdoor unit 2 and an indoor unit 3 are connected by piping. In addition, the air conditioner 1 is connected to a residual heat utilization unit 4 which is configured independently of the air conditioner 1 by piping, and a floor heater or the like in the room is connected to the residual heat utilization unit 4 by piping.

The outdoor unit 2 includes an engine driving unit 5
And an accumulator unit 6 and a heat radiating unit 7.
These components 5, 6, 7 are connected by a refrigerant system 8 and a cooling water system 9.

The engine drive unit 5 includes an engine 10
And two sets of compressors 1 rotationally driven by the engine 10
1 and 11 are provided. A gas mixer 13 with a built-in throttle valve and an air cleaner 14 are connected to an intake port of the engine 10 via an air line 12 in this order from the intake port side. The gas mixer 13 has a gas flow control valve 16 for mainly controlling the air-fuel ratio via a gas line 15, a zero governor (pressure reducing valve) 17, and an electromagnetic switching valve 1.
8 are connected in order from the gas mixer side, and a gas fuel source (not shown) is connected to the upstream end 15 a of the gas pipeline 15. Reference numeral 13a denotes a throttle valve drive motor for adjusting the opening of the throttle valve 13b in the gas mixer 13.

An exhaust pipe 19 connected to the exhaust port of the engine 10 is provided with an exhaust gas heat exchanger 20, an exhaust silencer 21, and a mist separator 22 in this order from the exhaust port. Drain water generated in the exhaust gas heat exchanger 20, the exhaust silencer 21, and the mist separator 22 is collected in the neutralizer 23 and discharged to the outside. Further, a lubricating oil tank 24a disposed at a higher position than the engine 10 is connected to the oil pan of the engine 10, and when the lubricating oil decreases, the electromagnetic on-off valve 24b
Is opened so that the lubricating oil in the lubricating oil tank 24a is supplied by gravity.

The compressor 11 has an output shaft 1 of the engine 10.
Oa is rotationally driven via the clutch 10b. The clutch 10b has a temperature sensor which is lower than the temperature detected by the temperature sensor 50a under the condition that the absolute value of the difference between the indoor set temperature by the remote controller 69f and the room temperature detected by the temperature sensor 69d is equal to or less than a predetermined value and the circulation pump 53 is operated. It turns off when the detected temperature of 55a is low, and stops the rotation of the compressor 11. And the discharge port 1 of both compressors 11
1a and the suction port 11b are connected so as to circulate the refrigerant by the refrigerant system 8.

The refrigerant system 8 supplies the refrigerant to the discharge port 11
a, a refrigerant pipe 8a, an oil separator 24 for separating and storing the lubricating oil in the refrigerant, and a refrigerant pipe 8b to guide to a port 25a of the four-way valve 25. During the cooling operation, the four-way valve 25 is switched to a state in which the ports 25a and 25c and the ports 25d and 25b communicate with each other, as indicated by the solid line in FIG. Therefore, the refrigerant system 8 guides the refrigerant from the port 25c to the refrigerant port 2f of the outdoor unit 2 through the refrigerant line 8c, the refrigerant outdoor heat exchanger 26, and the refrigerant lines 8d and 8e. The pipe 8f is guided to the port 25d of the four-way valve 25. On the other hand, during the heating operation, the four-way valve 25 is switched so that the ports 25a and 25d and the ports 25c and 25b communicate with each other as shown by the broken line in FIG. The refrigerant is guided from the port 25d to the refrigerant pipe 8f and the refrigerant port 2e, and the refrigerant is further transmitted from the refrigerant port 2f to the refrigerant pipes 8e and 8d and the refrigerant outdoor heat exchanger 26.
Through the port 25c. Furthermore, the refrigerant system 8 supplies the refrigerant to the port 25
b, the refrigerant is returned to the suction port 11b via the refrigerant line 8g, the main accumulator 6a, the refrigerant line 8h, the sub-accumulator 6b, and the refrigerant line 8i.

The refrigerant line 8h is provided with a capillary tube 70a, and the main accumulator 6a is provided with a temperature sensor 70b, which is a combination of a capillary tube and a temperature detector.
70c is connected. These temperature sensors 70b, 70
By detecting the refrigerant temperature in the main accumulator 6a at c, the level of the liquid-phase refrigerant in the main accumulator 6a is detected. Reference numeral 70d denotes a manual opening / closing valve (or electromagnetic opening / closing), and 70e denotes an oil strainer. When the amount of oil accumulated at the bottom of the main accumulator 6a increases, the manual opening / closing valve 70d is opened to allow oil to flow to the sub accumulator 6b. Has become.
Of course, the oil may be automatically supplied by an electromagnetic on-off valve.

The indoor unit 3 disposed in the room R is connected between the refrigerant port 2f and the refrigerant port 2e via a refrigerant pipe 63f and a refrigerant pipe 63e. The indoor unit 3 includes a heat exchanger 69a, a blowing fan 69
b, an electronic expansion valve 69c, etc., and an indoor temperature sensor 69d and a refrigerant temperature sensor 69e.

In the refrigerant pipe in the indoor unit 3, the heat exchanger 69a and the electronic expansion valve 69c are arranged in series, the heat exchanger 69a is on the refrigerant pipe 63e side, and the electronic expansion valve 69c is on the refrigerant pipe 63f side. It is said.

When the amount of the lubricating oil separated by the oil separator 24 exceeds a predetermined value, the oil strainer 2
7a, refrigerant line 8 on the compressor suction side via capillary tube 27b
Returned to i. The refrigerant pipe 8b is connected to the oil strainer 2
8a, solenoid on-off valve 2 that opens when the pipe pressure exceeds a predetermined value
It is connected to the refrigerant line 8g on the inlet side of the main accumulator 6a via 8b, thereby avoiding an abnormal rise in the refrigerant line high pressure.

A heat exchange section 29a located in the main accumulator 6a is provided between the refrigerant pipes 8d and 8e.
A manual or electromagnetic on-off valve 29c is provided, and an electromagnetic on-off valve 29d is provided in the refrigerant line 8f.

The refrigerant lines 8g and 8d are connected to the refrigerant line 8j.
Are connected via an electromagnetic on-off valve 30a and an oil strainer 30b. During cooling, when the load on the indoor unit 3 becomes particularly small, the electromagnetic on-off valve 30a opens to allow the refrigerant having passed through the refrigerant outdoor heat exchanger 26 to bypass the indoor unit 3 and flow from the refrigerant pipe 8g to the main accumulator 6a. Try to balance the load.

The refrigerant line 8b is connected to the high-pressure side pressure sensor 31a of the compressor 11, the refrigerant line 8i is connected to the low-pressure side pressure sensor 31b of the compressor 11, and the refrigerant in the refrigerant line 8d. A refrigerant temperature sensor 32a is connected between the outdoor heat exchanger 26 and the heat exchange section 29a.

The refrigerant system 8 is connected to a refrigerant outlet 2 via a flow control valve 71 from a refrigerant supply side branch line 8 b ′ for branching a high-temperature and high-pressure refrigerant upstream of the four-way valve 25.
b, the refrigerant is supplied to the condensing heat exchanger 41a on the side of the residual heat utilization unit 4 via the refrigerant supply line 63b, and the refrigerant passing through the condensing heat exchanger 41a is supplied from the refrigerant return line 63a to the refrigerant return port 2a.
a, a residual heat utilization path for circulating the refrigerant to the refrigerant line 8g via the branch line 8g 'on the refrigerant return side via the expansion valve 72.

The condensing heat exchanger 41a is for utilizing the difference between the maximum capacity of the compressor 11 and the maximum capacity required by the indoor unit 3, and the flow rate control valve 71 is used when the refrigerant has residual heat. Opened in The expansion valve 72 may be a fixed throttle or an electronic type, or may be provided on the residual heat utilization unit 4 side.

A three-way valve is provided in the branch pipe 8g 'at an intermediate portion between the expansion valve 72 and the refrigerant return port 2a, and a bypass pipe connecting the three-way valve and the refrigerant pipe 8e is provided.
The return refrigerant is not supplied to the refrigerant line 8g via the expansion valve 72,
The refrigerant may be guided from the three-way valve to the refrigerant line 8 e via the bypass line, and the returned refrigerant may be used for cooling in the indoor unit 3. In this case, the on-off valve 29c may be closed.

The cooling water system 9 includes an engine-side circulation halfway 9.
a and a heat radiation side circulation halfway 9b. The engine-side circulation half-way 9a supplies the engine cooling water with the cooling water pump 3
4. The cooling water pipe 33a, the cooling water jacket 10c in the engine 10, the cooling water pipe 33b, the thermostatic or electromagnetic switching valve 35, and the cooling water pipe 33c are circulated.

The radiating half-way 9b is connected to the engine 10
During normal operation in a warm-up state, the engine cooling water is supplied to the cooling water pipe 36a, the cooling water pump 37, the cooling water pipe 36b, the heat exchange section 38 in the exhaust gas heat exchanger 20, the cooling water pipe 36c,
Cooling water pump 34, cooling water pipe 33a, cooling water jacket 10c, cooling water pipe 33b, switching valve 35, cooling water pipe 36d, three-way valve 39, cooling water pipe 36e, linear three-way valve (or thermostat valve) 40, cooling water pipe The cooling water is circulated through the cooling water pipe 36a from the path 36g and the radiator 42.

The switching valve 35 connects the cooling water pipe 33b and the cooling water pipe 33c during the warm-up operation corresponding to the cold state immediately after the start of the engine 10.
During normal operation with 0 being in the warm-up state, the cooling water line 33
b and the cooling water pipe 36d. During the warm-up operation, the cooling water pump 37 is stopped. The cooling water pipe 36c
In this case, the cooling water pump 37 is rotated even during the warm-up operation, and the engine side circulation half-way 9a and the heat radiation side are connected. The cooling water is independently circulated through the circulation half passages 9b. However, during the warm-up operation, the heat flows from the heat exchange section 38 to the cooling water pipe 36c, the bypass cooling water pipe, and the cooling water pipe 36d.

The radiator 42 is disposed so as to overlap the refrigerant outdoor heat exchanger 26 in the flow direction of the cooling air, and the refrigerant outdoor heat exchanger 26 and the radiator 42
Is provided with a cooling fan 42a for forcibly blowing the cooling air. That is, during the cooling operation, both the radiator 42 and the refrigerant outdoor exchanger 26 are cooled by air, while during the heating operation, the heat radiated from the radiator 42 to the blown air is discharged outside the refrigerant chamber functioning as an evaporator. The refrigerant flowing through the heat exchanger 26 absorbs the heat.

The radiator 4 of the cooling water pipe 36 g
A cooling water inlet 44 and a cooling water reservoir tank 43 are connected to the downstream side of the cooling water line 36h through a cooling water pipe 36h. The cooling water inlet 44 has a relief function for the entire cooling water system 9. One outlet a of the cooling water inlet 44 is connected to one inlet a 'of the switching valve 35 of the engine-side circulation half-way 9a. Further, a water inlet 43b and a communication port 43a with the atmosphere are connected to an upper portion of the reservoir tank 43.

The cooling water system 9 supplies the engine cooling water from the nilia three-way valve (or thermostat valve) 40 to the branch pipe line 36e 'on the cooling water supply side, the cooling water outlet 2d,
The cooling water is supplied to the waste heat exchanger 41b on the side of the residual heat utilization unit 4 via the cooling water supply pipe 63d, and the engine cooling water having passed through the waste heat exchanger 41b is supplied from the cooling water return pipe 63c to the cooling water return port 2c, It has a residual heat utilization path circulated to the cooling water pipe 36a via the branch pipe 36a 'on the cooling water return side.

Here, the linear three-way valve 40 supplies the engine cooling water to the residual heat utilizing unit 4 according to the temperature of the cooling water.
It is configured to flow to the side or the radiator 42 side.
In this case, for example, when the temperature of the cooling water is lower than the temperature in the hot water storage tank of the residual heat utilization unit 4, all the cooling water is configured to flow to the radiator 42 side. Further, when the cooling water temperature is, for example, 85 ° C. or less, the entire amount of the linear three-way valve flows to the residual heat utilization unit 4 side, and when the cooling water temperature exceeds 85 ° C., the cooling water starts flowing to the radiator 42 side. If the temperature exceeds 90 ° C., 80% of the temperature may flow to the radiator 42 side.

It should be noted that a thermostat valve may be provided in place of the linear three-way valve 40 so that the quantity ratio can be varied in the same manner as described above depending on the temperature of the cooling water.

The three-way valve 39 is connected to the cooling water pipe 36a through a branch passage 36g '. A heat exchange section 39a is provided in the middle of the branch passage 36g ', and the heat exchange section 39a is located in the main accumulator 6a. By switching the three-way valve 39 to the branch passage 36g 'side, engine exhaust heat is supplied to the refrigerant in the main accumulator 6a.

The three-way valve 39 is connected to the upper temperature sensor 70 when the refrigerant level in the main accumulator 6a rises.
b, the flow rate of the cooling water to the heat exchange section 39a is increased to, for example, 1/3 of the total flow rate,
When the refrigerant liquid level reaches the level detected by the lower temperature sensor 70c, the divided flow rate of the cooling water to the heat exchange section 39a is reduced to 0.
And

The residual heat utilization unit 4 includes a hot water storage tank 50 for storing hot water, a boiler unit 51 for reheating the hot water in the hot water storage tank 50, and a condensed heat of the refrigerant from the outdoor unit 2. A condensing heat exchanger 41a for heating hot water, and a waste heat exchanger 41b for heating hot water in the hot water storage tank 50 with exhaust heat of engine cooling water from the outdoor unit 2 are provided.
Housed within.

The upper and lower portions of the hot water storage tank 50 are connected to each other by a circulation passage 53 for circulating hot water in the tank 50, and the hot water is transferred from the upper portion to the lower portion by a circulation pump 53 a provided in the circulation passage 53. Flowed toward. 5
Reference numeral 0a denotes a temperature sensor for detecting the temperature of hot water in the hot water storage tank 50. When the detected hot water temperature of the temperature sensor 50a becomes lower than a preset hot water storage tank temperature by a predetermined value or more, the circulating pump 53a is activated and the condensation is performed. Heating of hot water in the hot water storage tank by heat and engine exhaust heat
1a, starting with the exhaust heat exchanger 41b, the pump discharge amount is increased as the temperature difference increases.

In the casing 52, a refrigerant outlet 4b of the air conditioner 2 to which a refrigerant outlet 2b is connected via a refrigerant supply pipe 63b and a refrigerant return port 2a of the air conditioner 2 are provided.
Outlet 4a connected to a refrigerant return line 63a
The refrigerant inlet 4b and the refrigerant outlet 4a are connected to each other through a refrigerant passage 55. Furthermore, the casing 52 has a cooling water inlet 4d to which the engine cooling water outlet 2d of the air conditioner 2 is connected via a cooling water supply pipe 63d and a cooling water return port 2c of the air conditioner 2 having a cooling water outlet. Cooling water outlet 4 connected via return line 63c
The cooling water inlet 4d and the cooling water outlet 4c are connected to each other through a cooling water passage 56. In addition,
The flows of the refrigerant and the cooling water in the refrigerant passage 55 and the cooling water passage 56 flow from the bottom to the top in the condensing heat exchanger 41a and the exhaust heat exchanger 41b, respectively, so as to face the flow of the hot water in the circulation passage 53. This is a so-called counterflow that flows toward the outside, thereby increasing the heat exchange efficiency.

The condensing heat exchanger 41a is formed so as to give the condensing heat of the refrigerant flowing in the refrigerant passage 55 to the cooling water flowing in the circulation passage 53.
Thereby, the temperature of the water in the hot water storage tank 50 is raised. Further, the exhaust heat exchanger 41b is formed so as to give the exhaust heat of the engine cooling water flowing in the cooling water passage 56 to the cooling water flowing in the circulation passage 53, whereby the water in the hot water storage tank 50 is provided. Is heated.

The refrigerant passage 55 and the cooling water passage 56
Are provided with a coolant temperature sensor 55a and a coolant temperature sensor 56a, respectively. When the detected refrigerant temperature of the refrigerant temperature sensor 55a is lower than the detected hot water temperature of the temperature sensor 50a, the flow control valve 71 is closed and the residual heat utilization unit 4 is closed.
The supply of refrigerant to the side is stopped. Similarly, when the detected cooling water temperature of the cooling water temperature sensor 56a is lower than the detected hot water temperature of the temperature sensor 50a, the supply of the cooling water to the residual heat utilization unit 4 is stopped by the linear three-way valve 40. When both the supply of the cooling water and the supply of the refrigerant are stopped, the circulation pump 53a is basically stopped.

The casing 52 is provided with a city water inlet 4g to which a public water supply is connected and a hot water supply outlet 4h. The city water inlet 4g is connected to the bottom of the hot water storage tank 50 by a water supply line 54a. The hot water supply outlet 4h is connected to the ceiling of the hot water storage tank 50 by a hot water supply pipe 54b. Thus, a hot water supply path for taking out hot water from the upper end of the hot water storage tank 50 is configured.

A relief valve 54c is connected in the middle of the hot water supply passage 54b, and drainage from the relief valve 54c is discharged through a drain pipe 54d. The hot water supply outlet 4h is connected through a hot water supply pipe 57 to a hot water supply faucet 58 disposed indoors. A check valve 59 for preventing the back flow of water to the city water inlet 4g is provided in the water supply pipe 54a.

The exhaust heat exchanger 41b of the circulation passage 53
The heating supply pipe 53b branched further downstream is connected to a hot water outlet 4j formed in the casing 52, and the hot water return port 4i formed in the casing 52 is connected to the heating return pipe 5
It is connected to the hot water storage tank 50 via 3c. Thus, a heating path for supplying the warm water whose temperature has been increased by the heat exchangers 41a and 41b to the indoor heater is formed.

The hot water outlet 4j and the hot water return port 4i
Between the floor heater 61 disposed in the room R is a heating pipe 61
a and 61b. A flow control valve 62 is interposed in the heating pipe 61a. The temperature set by the remote control switch 61d of the floor heater 61 and the indoor temperature sensor 6 provided in the floor heater 61 are provided.
In accordance with the difference from the detected temperature 1c, the flow control valve 62 operates so that the larger the difference, the larger the hot water supply amount. In addition,
The circulation pump 53a of the circulation passage 53 is
It is also used for raising the temperature of the internal warm water and supplying hot water to the floor heater 61. For this reason, the remote control switch 61d
Is in the ON state, the circulation pump 53a operates even when both the cooling water supply and the refrigerant supply are stopped.

The boiler section 51 has a burner 64 disposed in the lower portion of the combustion case 60 and a hot water storage tank 5 disposed in the upper portion.
This is a configuration in which a heat exchange portion 64a of a reheating circulation passage 64c that circulates hot water within 0 is disposed. The additional heating circulation passage 64c is piped so as to connect the bottoms of the hot water storage tanks 50, so that hot water circulates by natural convection.

An exhaust pipe 60a is connected to the combustion case 60, and a ventilation fan 65 for ventilation is provided in the exhaust pipe 60a. An overheat / overpressure detection sensor 64b is provided in the middle of the reheating circulation passage 64c. A drain valve 64d is mainly used for maintenance and repair. Drainage from the drain valve 64d is supplied to the drain pipe 54.
It is discharged outside through d.

A gas supply pipe 65a is connected to the burner 64, and a gas flow control valve 66, a pressure control valve 67, and an opening / closing valve 68 are interposed in this gas supply pipe 65a in this order. A gas supply source is connected to the gas inlet 4k of the gas supply pipe 65a. When the detected hot water temperature of the temperature sensor 53d disposed downstream of the exhaust heat exchanger 41b in the circulation passage 53 becomes lower than a preset hot water storage tank temperature by a predetermined value or more, the burner 64 is automatically ignited, and this temperature is lowered. The gas flow regulating valve 66 operates so that the gas flow increases as the gas flow rate decreases.

As a result, priority is given to utilization of residual heat, and it is possible to reduce fuel consumption by the burner 64. In addition, even when the circulation pump 53a is stopped and the residual heat cannot be used, the temperature of the hot water storage tank is raised to enable floor heating and hot water supply. Further, the outdoor unit 2, the indoor unit 3, and the residual heat utilization unit 4 of the present embodiment include CPUs 45, 46, and 47 shown in FIG. Outdoor CP provided in the outdoor unit 2
U45 receives the detection signals of the various sensors and other sensor group 45b shown in FIG. 1 and outputs necessary control signals to the various actuators and other actuator group 45a shown in FIG. The indoor CPU 46 provided in the indoor unit 3 receives the detection signals of the various sensors and other sensor groups 46b shown in FIG. 2 and receives the various actuators and other actuator groups 46a shown in FIG.
Output the required control signal. Furthermore, the residual heat utilization CPU 47 provided in the residual heat utilization unit 4 is configured as shown in FIG.
The detection signals from the various sensors and the other sensor group 47b shown in FIG. 3 are input, and a required control signal is output to the various actuators and the other actuator group 47a shown in FIG.

Next, the operation and effect of the first embodiment based on the various control signals will be described. In the warm-up operation state immediately after the start of the engine, the engine cooling water circulates in a path of the cooling water pump 34, the cooling water pipe line 33a, the water cooling jacket 10c, the switching valve 35, and the cooling water pipe 33c (engine side circulation halfway 9a). When the engine temperature becomes equal to or higher than a predetermined temperature, for example, 60 ° C., the switching valve 35 is connected to the heat radiation side circulation
Switch to b side. At this time, if the switching valve 39 is switched to the accumulator side, the engine cooling water is supplied from the cooling water pump 37 to the cooling water pipe 36b, the heat exchange section 38 of the engine side exhaust heat exchanger 20, the cooling water pump 34, the cooling water pipe. 33a, water cooling jacket 10c, cooling water line 33
a, the switching valve 35, and the cooling water pipe 36d are supplied to the heat exchange section 39a of the main accumulator 6a through the switching valve 39, where heat is applied to the refrigerant.

When the bypass cooling water pipe connecting the cooling water pipe 36c and the cooling water pipe 36d is arranged as described above, the cooling water pump 37 is rotated even during the warm-up operation, so that the heat radiation side circulation is performed. Cooling water is circulated through the half path 9b, and the cooling water heated by the exhaust gas heat exchanger 20 is supplied to the heat exchange section 39a.
Alternatively, it can be supplied to the exhaust heat exchanger 41b.

During the cooling operation, the refrigerant gas which has been compressed by the compressors 11, 11 and has become high temperature and high pressure passes through the refrigerant pipes 8a, 8b, the four-way valve 25, and the refrigerant pipe 8c, and passes through the refrigerant outdoor heat exchanger. 26, where it is cooled by outside air and liquefied. The liquefied high-pressure refrigerant liquid is supplied to the refrigerant pipe 8d, the heat exchange section 29a in the main accumulator 6a,
The refrigerant is supplied to the indoor unit 3 via the refrigerant pipe 8e and the refrigerant supply pipe 63f, and the pressure is reduced by the electronic expansion valve 69c of the unit. The decompressed low-pressure refrigerant liquid evaporates by removing heat from the indoor air in the indoor heat exchanger 69b, and the evaporated heat causes a cooling effect to cool the room. The evaporated refrigerant gas flows from the refrigerant return line 63e to the refrigerant line 8
f, through the solenoid on-off valve 29d, the four-way valve 25, and the refrigerant line 8g, through the main accumulator 6a, the refrigerant line 8h, the sub-accumulator 6b, and the refrigerant line 8i.
And the above cycle is repeated.

During the heating operation, the refrigerant gas which has been compressed by the compressors 11 and has become high temperature and high pressure is supplied to the refrigerant lines 8a and 8b, the four-way valve 25, the electromagnetic switching valve 29d, the refrigerant line 8f and the refrigerant return. The indoor unit 3 through the pipe 63e
Is supplied to the indoor heat exchanger 69a, where it is cooled and liquefied by the indoor air, and the indoor air is warmed by the heat of condensation in this case, and a heating effect is obtained. The liquefied refrigerant liquid is reduced in pressure by the expansion valve 69c. The decompressed low-pressure refrigerant liquid passes through the refrigerant supply line 63f, the refrigerant line 8e, the heat exchanging portion 29a, and the refrigerant line 8d, and evaporates by removing heat from the outside air in the refrigerant outdoor heat exchanger 26. The low-pressure refrigerant gas passes through the refrigerant line 8c, the four-way valve 25, and the refrigerant line 8g, returns to the compressor 11 via the main accumulator 6a, the refrigerant line 8h, the sub-accumulator 6b, and the refrigerant line 8i, and returns to the above-described cycle. Is repeated.

When the temperature of the hot water in the hot water storage tank 5 of the residual heat utilization unit 4 is raised by the condensation heat of the refrigerant during the cooling operation or the heating operation, the flow control valve 71 of the branch passage 8b 'is appropriately opened. be opened. Then, a part of the refrigerant gas which has been made high temperature and high pressure by the compressor 11 is
From b ′, the refrigerant is supplied to the condensation heat exchanger 41a disposed in the refrigerant passage 55 in the residual heat utilization unit 4 through the refrigerant supply pipe 63b. The refrigerant gas is liquefied by applying heat to the hot water passing through the circulation passage 53 in the condensing heat exchanger 41a, and the temperature of the hot water is raised at this time. The liquefied refrigerant is supplied to the refrigerant return line 6.
From 3a, it passes through the expansion valve 72 of the branch passage 8g ', and expands at the expansion valve 72 to become low-pressure refrigerant liquid and a part of refrigerant gas. This refrigerant liquid is supplied to the heat exchange section 39 in the main accumulator 6a.
The gas is heated and gasified by a, and returns to the compressor 11 from the main accumulator 6a through the sub accumulator 6b together with the refrigerant gas already gasified.

When the temperature of the engine cooling water rises, the switching valve 35 causes the cooling water to flow toward the radiating half-way 9b, and a part of the cooling water passes through the switching valve 39 and the linear three-way valve 40 to form the cooling water branch pipe. From the passage 36e ', the cooling water is supplied to the exhaust heat exchanger 41b provided in the cooling water passage 56 in the residual heat utilization unit 4 through the cooling water supply pipe 63d. The hot water is supplied and the temperature rises. When a thermostat valve is provided instead of the nilia three-way valve 40, the temperature of the engine cooling water is, for example, 85 ° C.
When the temperature exceeds 90 ° C., the engine cooling water starts to diverge from the thermostat valve 40 also to the radiator 42 side. For example, when the temperature reaches 90 ° C., 80% of the coolant flows to the radiator 42 side, thereby reliably preventing the engine 10 from overheating.

If the temperature of the hot water in the hot water storage tank 50 detected by the temperature sensor 50a is lower than the set temperature by a predetermined value or more, the burner 64 of the boiler unit 51 automatically ignites and reheats. In this case, the flow regulating valve 66 may be operated so that the larger the difference between the detected temperature and the set temperature is, the larger the gas flow supplied to the burner 64 is.

When the engine is stopped, the circulation passage 53
The circulation pump 53a is stopped, but in this case also, the boiler section 51 operates so that hot water can be supplied to the faucet 58 and the floor heater 61. However, when the floor heater 61 is used when the engine is stopped, the circulation pump 5 is used.
3a will be driven.

Further, even when the air conditioning is not performed, the exhaust heat of the engine can be used. For example, when the room temperature matches or is close to the set temperature, the supply of the refrigerant to the indoor unit 3 is stopped by temporarily disengaging the clutch 10b. By flowing to the 4 side, engine exhaust heat can be used.

As described above, in the first embodiment, the hot water in the hot water storage tank 50 of the residual heat utilization unit 4 can be heated by both the condensing heat generated on the outdoor unit 2 side and the engine exhaust heat, and the condensing heat and the engine Both waste heat can be used effectively. In this case, only the air conditioning for operating the indoor unit 3 by the outdoor unit 2 can be performed, and in addition to the air conditioning, hot water supply and floor heating can be performed, which can respond to various demands of the user.

A boiler section 51 is provided, and a hot water storage tank 50 is provided.
When the temperature difference between the detected hot water temperature or the detected hot water temperature of the temperature sensor 53d and the set temperature exceeds a predetermined value, the burner 64 is automatically ignited, and the larger the temperature difference is, the more gas is supplied to the burner 64. Since the amount is increased, high-temperature hot water supply and heating can be performed even when sufficient heating due to condensation heat and engine exhaust heat cannot be obtained.

The branch line 8b 'is branched not from the refrigerant line 8b but from the refrigerant line 8c, connected to the refrigerant outlet 2b via a flow control valve, and the branch line 8g' is connected to the refrigerant line 8c.
Alternatively, a three-way valve may be provided at one of both branch portions by connecting to the refrigerant return port 2a via an expansion valve 72 which can be branched and opened from the refrigerant pipe 8d instead of from the g. In the case of such a configuration, high-temperature and high-pressure refrigerant is circulated to the refrigerant heat exchanger 41a by bypassing the refrigerant outdoor heat exchanger 26 during the cooling operation,
The hot water in the circulating hot water storage tank can be heated,
During the heating operation, when the outside air temperature is low and the liquid refrigerant cannot evaporate in the refrigerant outdoor heat exchanger 26, the low-temperature and low-pressure liquid refrigerant is bypassed through the refrigerant outdoor heat exchanger 26, and is expanded through an expansion valve that is opened. The refrigerant can be circulated through the refrigerant heat exchanger 41a, and the refrigerant can be evaporated by the hot water in the hot water storage tank heated by additional heating or exhaust heat of the engine.

FIG. 5 is a circuit diagram for explaining a device according to a second embodiment of the present invention. The same reference numerals as those in FIG. 3 denote the same or corresponding parts. The second embodiment is an example in which hot water whose temperature has increased through a condensation heat exchanger 41a and a waste heat exchanger 41b can be further heated by a boiler unit 51.

More specifically, the reheating circulation passage 64 c ′ of the boiler section 51 branches off from the downstream side of the exhaust heat exchanger 41 b of the circulation passage 53 and passes through the combustion case 60. Further, heat exchangers 74a and 74b are provided in branch passages branched from the downstream side of the combustion case 60 of the reheating circulation passage 64c 'via the linear three-way valve 73, and the heat exchangers 74a and 74b are connected to the heat exchangers 74a and 74b via circulation pumps 75a and 75b. Floor heater 76,7
6. A dryer 77 is connected.

In the second embodiment, the condensing heat exchanger 41
(a) Since the hot water whose temperature has increased through the exhaust heat exchanger 41b can be further reheated by the boiler section 51, the floor heater 76 and the dryer 77 can be operated with good responsiveness. In addition,
The linear three-way valve 73 adjusts the partial flow rate to the floor heater or the dryer. Further, the circulation pumps 75a and 75b are operated in response to the operation request of the floor heater 76 and the dryer 77.

Further, the additional heating amount, that is, the fuel gas supply amount, may be increased as the required heat amount of the floor heater 76 and the dryer 77 increases. That is, when the use of the floor heater 76 and the dryer 77 is started, the floor heater 76 and the dryer 77
In order to increase the temperature of the burner 64, even if the temperature detected by the temperature sensor 53d or the temperature sensor 50a is equal to or higher than a predetermined value for the automatic ignition of the burner 64, the reheating is performed by the burner 64. Further, the downstream portion of the additional heating circulation passage 64c 'is connected to the hot water storage tank 50, and the hot water storage tank is connected from the downstream portion of the exhaust heat exchanger 41b of the circulation passage 53 similarly to the embodiments of FIGS. The circulation passage 53e that returns directly to 50 may be omitted. Also, the relief valve 54c is connected to the hot water storage tank 5
0, the upstream portion of the hot water supply passage 54b may be connected to the downstream portion of the heat exchange portion 64a of the additional heating circulation passage 64c '.

FIG. 6 is a circuit diagram for explaining a device according to a third embodiment of the present invention. The same reference numerals as those in FIGS. 3 and 5 denote the same or corresponding parts. In the third embodiment, when the outdoor unit 2 is operated, the hot water whose temperature has increased through the condensing heat exchanger 41a and the exhaust heat exchanger 41b can be further fired by the boiler unit 51 as in the second embodiment, Further, when the operation of the outdoor unit 2 is stopped, the temperature in the hot water storage tank 50 is maintained while the circulation pump 53a is stopped,
In this example, a hot water supply function and a heating function can be secured.

More specifically, the midway of the additional heating circulation passage 64 'and the inside of the hot water storage tank 50 are communicated via a check valve 64e via a bypass passage 64f through a check valve 64e, and hot water is supplied to the hot water supply faucet 58 via a linear three-way valve 73. It is configured as follows.

In the third embodiment, when the outdoor unit 2 is operated, high-temperature hot water can be supplied using the refrigerant heat exchanger 41a, the exhaust heat exchanger 41b, and the boiler section 51, and the heating function and the drying function are enhanced. be able to. When the operation of the outdoor unit 2 is stopped, the circulation pump 53a is stopped, and the hot water in the hot water storage tank 50 is supplied from the branch passage 64f to the boiler unit 5.
1, the hot water supply function, the heating function, and the drying function can be secured, and the heat loss can be reduced by controlling the temperature in the hot water storage tank 50 to be low. By stopping the circulation pump 53a while the operation of the outdoor unit 2 is stopped, the circulating water is supplied to the refrigerant heat exchanger 41a and the exhaust heat exchanger 4a.
It is possible to prevent the heat from being reduced during the passage through 1b, and on the other hand, by operating both the circulation pumps 53a and 53a ', it is possible to increase the heat receiving efficiency during additional heating.

FIG. 7 is a circuit diagram for explaining a device according to a fourth embodiment of the present invention. The same reference numerals as in FIGS. 3, 5, and 6 denote the same or corresponding parts. The fourth embodiment is an example in which the fluctuation of the heating capacity in floor heating can be moderated.

Specifically, the hot water supply faucet 58 is connected to the additional heating circulation passage 64 'via the linear three-way valve 73, and one dryer 77 is further connected via the heat exchanger 74b. And about the floor heater 76, the hot water storage tank 5
The hot water in 0 is directly circulated through the direct heating path 76a. The floor heater 78 is configured to circulate hot water heated by the heat exchange unit 78b disposed in the hot water storage tank 50 directly through the heating path 78a.

In the fourth embodiment, the floor heaters 76 and 78
Of the heating capacity depends on the heat capacity of the hot water in the hot water storage tank 50. By increasing the volume of the hot water storage tank 50, the fluctuation of the heating capacity can be reduced. In particular, when the hot water supply and the dryer are not used, the temperature in the hot water storage tank 50 can be increased in a short time.

FIG. 8 is a circuit diagram for explaining a device according to a fifth embodiment of the present invention, and FIGS.
The same reference numerals indicate the same or corresponding parts. The fifth embodiment is an example in which the required capacity of the boiler unit 51 is reduced, and the unit for utilizing residual heat can be made compact.

Specifically, the branch passage (53b in FIG. 3, 64c 'in FIGS. 5 to 7) from the circulation passage 53 is eliminated, and the heat of condensation and the exhaust heat of the engine are used only for maintaining the temperature in the hot water storage tank 50. It is configured to be. As a result, the heat of condensation
The temperature inside the hot water storage tank 50 can be maintained high only by the exhaust heat of the engine, so that the necessary reheating capacity of the boiler unit 51 can be reduced to make the boiler unit 51 compact, and as a result, the entire unit utilizing waste heat can be made compact.

FIG. 9 is a circuit diagram illustrating a device according to a sixth embodiment of the present invention.
The same reference numerals indicate the same or corresponding parts. The sixth embodiment is an example in which the condensing heat exchanger 41a and the exhaust heat exchanger 41b are made independent so that the respective heat-raising capabilities can be sufficiently exhibited without being affected by the other heat exchanger. .

Specifically, the condensing heat exchanger 41a has the same configuration as in the first to fourth embodiments, and the exhaust heat exchanger 41b maintains the temperature of the hot water storage tank 50 in the same manner as in the fifth embodiment. It is configured to be used only for

Here, the refrigerant temperature at the inlet side of the refrigerant passage 55 is Tr, and the cooling water temperature at the inlet side of the cooling water passage 56 is T.
e, assuming that the set temperature in the hot water storage tank is Tt, Tt is always
<Tr and Tt <Te. Naturally, there are limits to the refrigerant temperature and the cooling water temperature, so that the set temperature Tt cannot be set too high. In particular, when the condensing heat exchanger 41a and the exhaust heat exchanger 41b are arranged in series in the common circulation passage 53 as in the case of the first to fifth embodiments, the temperature is increased by the upstream heat exchanger. As a result, the temperature of the hot water entering the downstream heat exchanger changes. In other words, the downstream heat exchanger is affected by the upstream heat exchanger, so that it may not be possible to sufficiently exert the temperature raising ability it can have.

In the sixth embodiment, the condensing heat exchanger 41a
And the exhaust heat exchanger 41b are configured independently of each other, so that they are not affected by other heat exchangers and can sufficiently exhibit their respective temperature-raising capabilities. In addition, the hot water that has passed through the condensation heat exchanger 41a is circulated through the boiler unit 51, and the waste heat exchanger 41b is used only for maintaining the temperature of the hot water storage tank. Although the reheating amount increases when the amount is small, the hot water in the hot water storage tank can always be stably heated by the engine exhaust heat.

In contrast to the sixth embodiment, the hot water passed through the exhaust heat exchanger 41b is circulated through the boiler 51, and the condensing heat exchanger 41a is used only for maintaining the temperature of the hot water storage tank. You may. In this case, it is possible to reduce the amount of reheating when the residual heat of the condensed heat is small, such as at the start of air conditioning. Conversely, when a boiler unit having a sufficiently large reheating amount is provided, hot water supply and heating at a high temperature can be performed even at the start of air conditioning. The downstream part of the circulation passage 53 ′ is connected to the hot water storage tank 50, so that both the exhaust heat and the condensation heat can be received by operating both the circulation pumps 53 a and 53 a ′ even when the additional heating is stopped. .

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an outdoor unit of an engine driven compression air conditioner according to a first embodiment of the first and second aspects of the present invention.

FIG. 2 is a circuit configuration diagram of a residual heat utilization unit and an outdoor unit of the first embodiment device.

FIG. 3 is a circuit configuration diagram of a residual heat utilization unit of the first embodiment.

FIG. 4 is a block diagram of a control device of the first embodiment.

FIG. 5 is a circuit configuration diagram of a residual heat utilization unit according to a second embodiment of the third invention.

FIG. 6 is a circuit configuration diagram of a residual heat utilization unit according to a third embodiment of the present invention.

FIG. 7 is a circuit configuration diagram of a residual heat utilization unit according to a fourth embodiment of the present invention.

FIG. 8 is a circuit configuration diagram of a residual heat utilization unit according to a fifth embodiment of the present invention.

FIG. 9 is a circuit configuration diagram of a residual heat utilization unit according to a sixth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine driven compression air conditioner 4 residual heat utilization unit 4a refrigerant outlet 4b refrigerant inlet 4c cooling water outlet 4d cooling water inlet 41a condensation heat exchanger 41b waste heat exchanger 50 hot water storage tank 51 boiler 52 casing 53 circulation path 53 'first Path 53 '' Second path 53a Circulation pump 53b Heating path 54b Hot water supply path 55 Refrigerant path 56 Cooling water path 64 Burner 64a Heat exchange parts 64c, 64c 'Reheating circulation path 64e Check valve 64f Bypass path 78a Direct heating path

Claims (7)

[Claims] 1. A hot water storage tank for storing hot water, a boiler section for reheating the hot water in the hot water storage tank, a casing surrounding at least a part of the boiler section and the hot water storage tank, and a hot water in the hot water storage tank. A circulation passage for circulation,
A refrigerant passage communicating between a refrigerant inlet through which a refrigerant from the engine driven compression air conditioner is introduced and a refrigerant outlet through which the refrigerant is led to the air conditioner; and cooling water into which engine cooling water from the air conditioner is introduced. A cooling water passage which communicates an inlet and a cooling water outlet from which the engine cooling water is led to the air conditioner; and a condensing heat exchanger which heats hot water in the circulation passage with heat of condensation of the refrigerant in the refrigerant passage. A waste heat exchanger for heating the hot water in the circulation passage with waste heat of the engine cooling water in the cooling water passage. 2. The circulating passage according to claim 1, wherein the circulating passage includes a circulating pump that communicates an upper part and a lower part of the hot water storage tank and circulates hot water in the hot water storage tank from the upper part to the lower part. The condensing heat exchanger and the waste heat exchanger are arranged in series between the refrigerant passage and the cooling water passage, and the boiler circulates hot water in the hot water storage tank by natural convection. A reheating circulation path, which includes a burner that heats a heat exchange unit formed in the middle of the reheating circulation path, and a heating path branched from both heat exchangers downstream of the circulation path, And a hot water supply path taken out from an upper end of the hot water storage tank. 3. The circulation passage according to claim 1, wherein the circulation passage includes a circulation pump that communicates an upper part and a lower part of the hot water storage tank and circulates hot water in the hot water storage tank from the upper part to the lower part. The condensing heat exchanger and the exhaust heat exchanger are arranged in series between the refrigerant passage and the cooling water passage, and the boiler section is disposed in the circulation passage from a downstream side of the heat exchangers. It includes a branched reheating circulation passage, and a burner for heating a heat exchange unit formed in the middle of the reheating circulation passage, and includes a heating path and a hot water supply path from a burner downstream side of the reheating circulation path. A unit for utilizing residual heat of an engine-driven compression air conditioner, wherein at least one of the branches is formed so that hot water whose temperature has risen due to condensation heat and exhaust heat can be further heated. 4. The circulation passage according to claim 1, wherein the circulation passage includes a circulation pump that communicates an upper part and a lower part of the hot water storage tank and circulates hot water in the hot water storage tank from the upper part to the lower part. The condensing heat exchanger and the exhaust heat exchanger are arranged in series between the refrigerant passage and the cooling water passage, and the boiler section is disposed in the circulation passage from a downstream side of the heat exchangers. A branched reheating circulation passage, a burner that heats a heat exchange unit formed in the middle of the reheating circulation passage, a bypass passage that communicates the hot water storage tank with a burner upstream side of the reheating circulation passage, A check valve interposed in the bypass passage and allowing only a flow from the hot water storage tank to the reheating circulation passage; and a heating path and a hot water supply pipe from a downstream side of the burner of the reheating circulation passage. At least one A surplus heat utilization unit for an engine driven compression air conditioner, characterized in that one side is branched. 5. The unit according to claim 1, further comprising a direct heating path for circulating hot water in the hot water storage tank through a heater. . 6. The circulating pump according to claim 1, wherein the circulation passage communicates between the upper portion and the lower portion of the hot water storage tank without having a branch passage, and circulates hot water in the hot water storage tank from the upper portion to the lower portion. Wherein the condensing heat exchanger is provided between the circulation passage, the refrigerant passage, and the cooling water passage.
The exhaust heat exchanger is disposed in series, and the boiler section includes a reheating circulation path for circulating hot water in the hot water storage tank by natural convection, and a heat exchange formed in the reheating heating circulation path. And a burner for heating the heating section of the engine, and at least one of a hot water supply path and a heating path taken out from the downstream side of the burner in the additional heating circulation path. Usage unit. 7. The circulation path according to claim 1, wherein the circulation path has a first path returning from the hot water storage tank to the hot water storage tank through the boiler section, and a second path for directly communicating the upper part and the lower part of the hot water storage tank. One of the condensation heat exchanger and the exhaust heat exchanger is disposed in the first path, the other is disposed in the second path, and the heat exchanger disposed in the second path is a hot water storage. A residual heat utilization unit for an engine-driven compression air conditioner, wherein only the maintenance of the temperature in the tank is performed.