JP2011033295A - High temperature type heat pump system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-temperature type heat pump system capable of achieving stable performance. <P>SOLUTION: The high-temperature type heat pump system comprises a first unit (10) equipped with a heat pump flowing a first fluid therein, including an endoergic part (11), a compression part (12), a heat-radiation part (13), and an expansion part (14), and pumping-up heat of an outside medium, and a second unit (20) which includes a path (22) flowing a second fluid therein and to which the second fluid which has received transmitted heat from the first fluid is output. The heat pump (10) further includes an intermediate part (40) where the first fluid from the heat-radiation part (13) is at least temporarily stored for supplying the gas-phased first fluid to the compression part (12), and a complementary heat absorption part (60) for transmitting the heat from the outside medium to at least either the first fluid going to the intermediate part (40) or the first fluid in the intermediate part (40). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a high-temperature heat pump system.

  Conventionally, the output temperature of the heat medium in the heat pump system is generally 40 to 50 ° C. As a system having a high output temperature, a configuration is known in which a heated fluid is heated by burning fuel in a boiler (see, for example, Patent Document 1).

JP-A-6-249450

  A system using a boiler has a relatively low primary energy efficiency. On the other hand, in a system using a heat pump, if the amount of heat and temperature supplied from a heat source are unstable, there may be a situation where the heat demand cannot be sufficiently met.

  An object of this invention is to provide the high temperature type heat pump system which can achieve the stable performance.

  According to the aspect of the present invention, the first fluid flows, includes a heat absorption part, a compression part, a heat dissipation part, and an expansion part, and includes a first unit including a heat pump that pumps up heat of the external medium, and a path through which the second fluid flows. And a second unit that outputs the second fluid that has received the heat transferred from the first fluid, and the heat pump at least temporarily stores the first fluid from the heat radiating portion, Complement in which heat from the external medium is transmitted to at least one of the intermediate part in which the first fluid in the gas phase is supplied to the compression part, the first fluid heading toward the intermediate part, and the first fluid in the intermediate part. There is provided a high-temperature heat pump system that further includes a heat absorption part.

  According to the aspect of the present invention, by having the heat absorption part and the supplemental heat absorption part, it is possible to flexibly cope with fluctuations in the heat source level. As a result, the high temperature heat pump can achieve stable performance.

It is the schematic which shows 1st Embodiment. It is the schematic which shows 2nd Embodiment. It is the schematic which shows 3rd Embodiment. It is the schematic which shows 4th Embodiment. It is the schematic which shows 5th Embodiment. It is the schematic which shows 6th Embodiment.

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

  FIG. 1 is a schematic diagram showing a high-temperature heat pump system S1 according to the first embodiment. In FIG. 1, a heat pump system S1 includes a heat pump 10 (first unit) through which a working fluid (working medium, first fluid) flows, and a supply unit 20 (second unit) for a heated fluid (heated medium, second fluid). ) And a control device 70. The control device 70 comprehensively controls the entire system. The configuration of the system S1 can be variously changed according to the design requirements of the system S1.

  In the present embodiment, the fluid to be heated is water. In other embodiments, other media are applicable as the heated fluid. As other examples of the fluid to be heated, high-pressure water (compressed water), low-viscosity oil (for example, silicon oil, propylene glycol, or the like) can be used.

  In the present embodiment, the supply unit 20 has a path (conduit 22) through which the fluid to be heated flows, and the fluid to be heated is supplied from the supply source to the supply unit 20. The output temperature (extraction temperature) of the heated fluid (water) from the supply unit 20 is 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, or 150. It is above ℃. For example, when water is heated to 100 ° C. or higher under atmospheric pressure, steam of 100 ° C. or higher is output from the supply unit 20. In the present embodiment, the fluid to be heated having a low output temperature (less than 70 ° C.) can be taken out as necessary.

  The heat pump 10 is a device that pumps heat from a low-temperature object (external medium) and supplies heat to the high-temperature object by a cycle including evaporation, compression, condensation, and expansion processes. A heat pump generally has the advantage of relatively high energy efficiency and, as a result, relatively low emissions of carbon dioxide and the like.

  In the present embodiment, the heat pump 10 includes a heat absorption unit 11, a compression unit 12, a heat radiation unit 13, and an expansion unit 14, which are connected via a conduit. In the present embodiment, the heat pump 10 further includes an intermediate part 40 (first intermediate part 40A, second intermediate part 40B, and third intermediate part 40C), an intermediate heat exchange part 44, and a supplemental heat absorption part 60. Note that various sensors, pumps, valves, and the like (not shown) can be disposed in each part and conduit as needed.

  In the heat absorption part 11, the working fluid absorbs heat from a heat source (external medium) outside the cycle. In the present embodiment, the heat absorbing unit 11 includes an evaporator that is thermally connected to the heat radiating pipe 91 </ b> A of the external device 90 and in which the working fluid evaporates. That is, the heat absorption part 11 has a function as an evaporator. The heat of the medium (refrigerant, etc.) flowing through the heat radiating pipe 91 </ b> A is absorbed by the heat absorbing part 11 of the heat pump 10. As a heat source, it is possible to use the exhaust heat (heat exhaust heat) of the external device 90. It can also be set as the structure which the heat absorption part 11 absorbs the heat of other heat sources, such as air | atmosphere.

  In the present embodiment, the heat absorbing unit 11 has a region where the liquid phase of the working fluid exists and a region where the gas phase of the working fluid exists. The heat radiating pipe 91A of the external device 90 is disposed in the liquid phase region. Alternatively or additionally, the endothermic part 11 can have a spray structure.

  The compression unit 12 compresses the working fluid by a compressor or the like. At this time, the temperature of the working fluid usually increases. The compressing unit 12 has a structure for compressing the working fluid into a single stage or a plurality of stages. The number of stages of compression is set according to the specification of the system S1, and is 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more. Among the various compressors such as an axial flow compressor, a centrifugal compressor, a reciprocating compressor, and a rotary compressor, a compressor suitable for compressing a working fluid is applied. Power is supplied to the compressor. The compression ratio (pressure ratio) of the compression unit 12 is set according to the specifications of the system S1.

  In the present embodiment, the compression unit 12 has a four-stage compression structure including a first compression unit 12A, a second compression unit 12B, a third compression unit 12C, and a fourth compression unit 12D. As the working fluid used in the heat pump 10, various known heat mediums such as chlorofluorocarbon media (HFC 245fa, R134a, etc.), ammonia, water, carbon dioxide, air, etc. are used according to the specifications and heat balance of the system S1 It is done. In this embodiment, when R134a is used as the working fluid, the first compression unit 12A and the second compression unit 12B increase the low pressure R134a from the heat absorption unit 11 to an intermediate pressure. The third compression unit 12C and the fourth compression unit 12D increase the pressure of R134a from the second compression unit 12B to a high pressure (including a supercritical pressure region). The present invention is applicable to both specifications in which at least a part of the working fluid is in a supercritical state and specifications in which the working fluid is not in a supercritical state.

  In the heat radiating part 13, the heat of the working fluid flowing in the main path 15 is given to a heat source outside the cycle. In the present embodiment, the heat dissipating unit 13 is thermally connected to the supply unit 20, and the working fluid dissipates heat therein to become a liquid phase.

  In this embodiment, when R134a is used as the working fluid, heat exchange is performed between the supercritical state and liquid phase R134a and the water flowing through the supply unit 20, and high-temperature water or steam is output from the supply unit 20. Is done.

  In the present embodiment, the heat radiating section 13 has a region where a gas phase (or supercritical state) working fluid exists and a region where a liquid phase working fluid exists. In this embodiment, the conduit 22 of the supply unit 20 is arranged over both regions. Alternatively or additionally, the heat dissipation part 13 may have a spray structure.

  The expansion unit 14 expands the working fluid by a pressure reducing valve, a turbine, or the like. At this time, the temperature of the working fluid usually decreases. When a turbine is used, power can be taken out from the expansion unit 14, and the power may be supplied to the compression unit 12, for example.

  In the present embodiment, the expansion unit 14 includes a high-pressure or intermediate-pressure expansion valve 24 (expansion valve 24A, expansion valve 24B, expansion valve 24C) and a low-pressure expansion valve 25. The expansion valve 24A is disposed on a conduit 26A that fluidly connects the heat dissipating part 13 and the first intermediate part 40A. More specifically, the arrangement position of the expansion valve 24A is on the conduit 26A and before the working fluid inlet in the first intermediate portion 40A. The expansion valve 24A reduces the high-pressure working fluid from the heat radiating unit 13 to an intermediate pressure. Similarly, the expansion valve 24B is disposed on a conduit 26B that fluidly connects the first intermediate portion 40A and the second intermediate portion 40B, and the expansion valve 24C includes the second intermediate portion 40B and the third intermediate portion 40C. Are disposed on a conduit 26C that fluidly connects the two. The expansion valves 24A-24C can also control the flow rate of the working fluid.

  The expansion valve 25 is disposed on a conduit 27 that fluidly connects the third intermediate portion 40C and the heat absorbing portion 11, and reduces the working fluid from the third intermediate portion 40C to a low pressure. More specifically, the arrangement position of the expansion valve 25 is on the conduit 27 and before the inlet of the working fluid in the heat absorption part 11. The expansion valve 25 can also control the flow rate of the working fluid.

  The intermediate portions 40A-40C separate the working fluid decompressed to an intermediate pressure into a gas phase and a liquid phase, and store the working fluid at least temporarily. The gas phase working fluid from the first intermediate portion 40A is injected between the stages of the third compression portion 12C and the fourth compression portion 12D through the conduit 23A. The gas phase working fluid from the second intermediate portion 40B is injected between the stages of the second compression portion 12B and the third compression portion 12C through the conduit 23B. The gas phase working fluid from the third intermediate portion 40C is injected between the first compression portion 12A and the second compression portion 12B through the conduit 23C.

  The intermediate heat exchange part 44 is for giving a part of heat of the working fluid having a relatively high temperature to the working fluid in the middle of the compression part 12. In the intermediate heat exchanging unit 44, heat exchange is performed between the working fluid from the heat radiating unit 13 and the working fluid in the middle of the compression unit 12 (between the second compression unit 12B and the third compression unit 12C). .

  In the present embodiment, the intermediate heat exchanging part 44 is a part of the conduit between the interstage part of the compression part 12 and the main path 15 of the heat pump 10 (part of the conduit 30 between the heat radiation part 13 and the first intermediate part 40A). ) And are thermally connected. The intermediate heat exchange unit 44 may have a countercurrent heat exchange structure in which a high-temperature fluid (working fluid in the compression unit 12) and a low-temperature fluid (working fluid in the conduit 30) flow in opposition. Alternatively, the intermediate heat exchange unit 44 may have a parallel flow type heat exchange structure in which a high-temperature fluid and a low-temperature fluid flow in parallel.

  Various heat exchange structures such as a plate-type heat exchange structure and a fin-and-tube heat exchange structure can be applied to the intermediate heat exchange unit 44.

  The auxiliary heat absorption unit 60 is for transferring heat from an external medium to at least one of the working fluid toward the intermediate unit 40 and the working fluid in the intermediate unit 40. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption unit 60, which is a place different from the heat absorption unit 11. In the present embodiment, the supplemental heat absorption part 60 is disposed between the expansion valve 24B and the second intermediate part 40B on the path between the first intermediate part 40A and the second intermediate part 40B.

  In the present embodiment, the auxiliary heat absorption unit 60 includes a conduit (part of a conduit on the main path of the heat pump 10) thermally connected to the heat radiating pipe 91B (part of the conduit of the external device 90) of the external device 90. . For example, both conduits are placed in contact with or adjacent to each other. In the present embodiment, the heat exchange structure is configured including the auxiliary heat absorption part 60 and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91 </ b> B of the external device 90 exchanges heat with the working fluid from the first intermediate portion 40 </ b> A flowing through the auxiliary heat absorption unit 60. The heat exchange structure including the supplemental heat absorption unit 60 may have a countercurrent heat exchange structure in which a low-temperature fluid and a high-temperature fluid flow oppositely. Alternatively, the heat exchange structure including the auxiliary heat absorption unit 60 can have a parallel flow type heat exchange structure in which a high-temperature fluid and a low-temperature fluid flow in parallel.

  In addition, the path of the external medium from the external device 90 may include a sensor that measures the temperature and / or flow rate of the external medium and a valve that switches the supply path of the external medium. For example, the control device 70 can select a supply destination of the external medium between the heat absorbing unit 11 (radiating pipe 91A) and the auxiliary heat absorbing unit 60 (radiating pipe 91B) based on the measurement result of the sensor.

  In the heat pump system S1 configured as described above, when the heat pump 10 is operated, the water flowing through the supply unit 20 is heated by the heat supplied from the heat pump 10, and as a result, high-temperature water or steam is output from the supply unit 20. .

Hereinafter, the operation of the heat pump system S1 will be described.
In the heat pump 10, the compression unit 12 is driven. The first compression unit 12A compresses the working fluid from the heat absorption unit 11. The second compression unit 12B compresses the working fluid from the first compression unit 12A and the working fluid from the third intermediate unit 40C. The third compression unit 12C compresses the working fluid from the second compression unit 12B and the working fluid from the second intermediate unit 40B. The fourth compression unit 12D compresses the working fluid from the third compression unit 12C and the working fluid from the first intermediate unit 40A.

  The compressed working fluid from the compression unit 12 is supplied to the heat dissipation unit 13. In the heat radiating unit 13, heat from the working fluid is transmitted to the heated fluid (water) flowing through the conduit 22 of the supply unit 20. From the supply unit 20, water or steam heated to a high temperature is output. With the heat exchange between the working fluid and the medium to be heated, a part of the working fluid becomes a liquid phase inside the heat radiating unit 13.

  The liquid-phase working fluid from the heat radiating unit 13 flows through the intermediate heat exchanging unit 44. In the intermediate heat exchange unit 44, heat from the working fluid from the heat radiating unit 13 having a relatively high temperature is transmitted to the working fluid between the stages of the compression unit 12.

  As a result, the working fluid injected between the stages of the compression unit 12 (inlet of the third compression unit 12C) is heated. When the temperature of the injected fluid and the introduced fluid (the inlet temperature of the working fluid in the compression unit 12) increases, the output temperature of the working fluid from the compression unit 12 also increases. Therefore, according to the present embodiment, the medium to be heated can be stably heated at a high temperature.

  The liquid-phase working fluid from the heat radiating unit 13 is decompressed to an intermediate pressure by the expansion valve 24A. By controlling the opening degree of the expansion valve 24 </ b> A, the liquid level of the heat radiating unit 13 can be controlled.

  The reduced working fluid from the expansion valve 24A flows into the first intermediate portion 40A. In the first intermediate portion 40A, the working fluid is separated into a gas phase and a liquid phase. The gas phase working fluid from the first intermediate section 40A is supplied to the middle of the compression section 12 (between the third compression section 12C and the fourth compression section 12D) via the conduit 23A.

  The working fluid from the first intermediate portion 40A is further decompressed by the expansion valve 24B. By controlling the opening degree of the expansion valve 24B, the liquid level of the first intermediate portion 40A can be controlled.

  The decompressed working fluid from the first intermediate portion 40 </ b> A flows through the auxiliary heat absorption portion 60. In the auxiliary heat absorption part 60, the heat of the medium (external medium) from outside the cycle is transmitted to the working fluid. The working fluid absorbs the heat of the external medium flowing through the heat radiating pipe 91B. Along with the heat exchange between the medium outside the cycle and the working fluid, a part of the working fluid evaporates inside the auxiliary heat absorption unit 60. The evaporation of the working fluid is promoted by the absorption of heat by the auxiliary heat absorption unit 60. In other words, the auxiliary heat absorption part 60 has a function as an evaporator in which the working fluid evaporates.

  The working fluid from the auxiliary heat absorption part 60 flows into the second intermediate part 40B. In the second intermediate portion 40B, the working fluid is separated into a gas phase and a liquid phase. The gas phase working fluid from the second intermediate section 40B is supplied to the middle of the compression section 12 (between the second compression section 12B and the third compression section 12C) via the conduit 23B.

  The working fluid from the second intermediate portion 40B is further depressurized by the expansion valve 24C. By controlling the opening degree of the expansion valve 24C, the liquid level of the second intermediate portion 40B can be controlled.

  The reduced working fluid from the second intermediate portion 40B flows into the third intermediate portion 40C. In the third intermediate portion 40C, the working fluid is separated into a gas phase and a liquid phase. The gas phase working fluid from the third intermediate part 40C is supplied to the middle of the compression part 12 (between the first compression part 12A and the second compression part 12B) via the conduit 23C.

  The liquid-phase working fluid from the third intermediate portion 40C is decompressed to a low pressure by the expansion valve 25. By controlling the opening degree of the expansion valve 25, the liquid level of the third intermediate portion 40C can be controlled.

  The reduced working fluid from the third intermediate portion 40C is supplied to the heat absorbing portion 11. In the heat absorbing part 11, the heat of the medium (external medium) from outside the cycle is transmitted to the working fluid. A part of the working fluid evaporates inside the heat absorbing part 11 with heat exchange between the medium outside the cycle and the working fluid. The gas phase working fluid from the heat absorption unit 11 is supplied to the compression unit 12. In this way, the above cycle is repeated.

  In this embodiment, when R134a is used as the working fluid, the heat from the R134a is transferred to the heated fluid (water) in the supply unit 20 in the heat radiating section 13, and high-temperature water or steam at about 130 ° C. Can be generated. The temperature of the critical point of R134a (HFC134a) is in the vicinity of 100 ° C., which is the normal boiling point of water, and the output temperature of R134a from the compression unit 12 can be set to about 150 ° C. Therefore, R134a is suitable as a working fluid for a heat pump cycle in which the medium to be heated is water. Moreover, the output temperature of R134a from the compression part 12 is set to about 150 degreeC, The pressure can be restrained comparatively low to about 5 MPa. This is advantageous in reducing the apparatus cost.

  In the present embodiment, in the intermediate heat exchange unit 44, heat from the working fluid from the heat radiating unit 13 having a relatively high temperature is transmitted to the working fluid flowing between the stages of the compression unit 12. As a result, the output temperature of the working fluid from the compression unit 12 increases. Therefore, according to the present embodiment, it is possible to effectively utilize the excess heat of the working fluid and stably heat the medium to be heated at a high temperature.

  In the present embodiment, the heating of the working fluid between the stages of the compression unit 12 is effective in recovering the excess heat of the working fluid. The recovery of surplus heat is advantageous in improving the coefficient of performance (COP) as energy efficiency.

  In the present embodiment, since the heat of the working fluid from the heat radiating unit 13 is taken away in the intermediate heat exchanging unit 44, the input temperature of the working fluid to the expansion valve 24A and the first intermediate unit 40A is lowered.

  Here, when the exhaust heat (hot exhaust heat) of the external device 90 is used, a plurality of exhaust heats having different temperature levels may be supplied from the external device 90. Or the temperature and flow rate of the exhaust heat may vary. Such fluctuations in the heat source level may lead to instability of operation such as fluctuations in the output temperature from the heat pump system S1.

  In the present embodiment, it is possible to vary the temperature of the external medium that is a heat source between the heat absorbing unit 11 and the auxiliary heat absorbing unit 60. The external medium from the external device 90 can be selectively supplied to one of a plurality of heat absorption units (the heat absorption unit 11 and the auxiliary heat absorption unit 60) suitable for the temperature of the external medium. Thereby, the heat of the external medium is effectively used. As a result, the heat pump system S1 can be stably operated.

  For example, in the present embodiment, the temperature of the external medium for the auxiliary heat absorption unit 60 can be made higher than the temperature of the external medium for the heat absorption unit 11. In one example, the temperature of the external medium with respect to the heat absorbing unit 11 is about 35 ° C., the temperature of the external medium with respect to the auxiliary heat absorbing unit 60 is about 55 ° C., and the output temperature of the system S 1 is about 130-140 ° C.

  It is more efficient in terms of heat efficiency to supply a plurality of external media having different temperature levels separately than to supply them mixed. Additionally or alternatively, multiple external media with different temperature levels can be mixed. Also, a plurality of external media having temperatures close to each other can be mixed and supplied, and a plurality of external media having temperatures separated from each other can be supplied separately.

  As described above, in the present embodiment, the heat pump system S1 includes a plurality of heat absorption units, so that it is possible to select a supply destination of the external medium according to the temperature level, and as a result, the heat source level can be flexibly changed. Yes. That is, in the present embodiment, the heat pump system S1 has high versatility with respect to the heat source level.

  In the present embodiment, the heat pump system S1 can be switched between partial operation and full operation according to the heat source level. In the present embodiment, the heat pump system S1 can be partially operated when the flow rate per unit time of the external medium having a relatively high temperature (for example, about 55 ° C.) is equal to or greater than the required amount. In this partial operation, the external medium having a relatively high temperature flows through the heat radiating pipe 91B. That is, a relatively high temperature external medium is supplied to the auxiliary heat absorption unit 60, while a relatively low temperature (eg, about 35 ° C.) external medium may or may not be supplied to the heat absorption unit 11. Good. Further, in the partial operation, the working fluid includes the auxiliary heat absorption unit 60, the second intermediate unit 40B, the third compression unit 12C, the fourth compression unit 12D, the heat radiation unit 13, the intermediate heat exchange unit 44, the expansion valve 24A, and the first intermediate. The part 40A and the expansion valve 24B substantially flow in this order.

  In the partial operation, the first compression unit 12A and the second compression unit 12B in the heat pump system S1 can be stopped. As a result, the partial operation can obtain a high COP. In one trial calculation example of the system S1, the COP at the time of full operation (4-stage compression, 4-stage cycle) is 2.66, and the COP at the time of partial operation (2-stage compression, 2-stage cycle) is 3.77. In this trial calculation example, when the external medium having a relatively high temperature (for example, about 55 ° C.) is supplied less than the required amount and the external medium having a relatively low temperature (for example, about 35 ° C.) is also supplied, 2.66 to 3 A COP between .77 can be obtained.

  Additionally or alternatively, the external medium used in one of the auxiliary heat absorption part 60 and the heat absorption part 11 can be used for the other. For example, an external medium that has been absorbed by the auxiliary heat absorption unit 60 and has fallen in temperature can be supplied to the heat absorption unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91A.

  In the present embodiment, the number of heat absorption parts including the auxiliary heat absorption part 60 is two. In other embodiments, the number of heat sinks can be 3, 4, 5, 6, 7, 8, 9, 10 or more. Additionally or alternatively, the supplemental heat sink 60 can be placed at other locations.

  FIG. 2 is a schematic diagram showing a heat pump system S2 according to the second embodiment. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  As shown in FIG. 2, the heat pump system S2 includes a supplemental heat absorption unit 60 disposed between the second intermediate unit 40B and the third intermediate unit 40C. That is, in this heat pump system S2, the arrangement | positioning position of the supplementary heat absorption part 60 differs with respect to heat pump system S1 of FIG.

  The auxiliary heat absorption unit 60 is for transferring heat from an external medium to at least one of the working fluid toward the intermediate unit 40 and the working fluid in the intermediate unit 40. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption unit 60, which is a place different from the heat absorption unit 11. In the present embodiment, the supplemental heat absorption part 60 is disposed between the expansion valve 24C and the third intermediate part 40C on the path between the second intermediate part 40B and the third intermediate part 40C.

  In the present embodiment, the auxiliary heat absorption unit 60 includes a conduit (part of a conduit on the main path of the heat pump 10) thermally connected to the heat radiating pipe 91B (part of the conduit of the external device 90) of the external device 90. . For example, both conduits are placed in contact with or adjacent to each other. In the present embodiment, the heat exchange structure is configured including the auxiliary heat absorption part 60 and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91 </ b> B of the external device 90 exchanges heat with the working fluid from the second intermediate portion 40 </ b> B flowing through the auxiliary heat absorption unit 60. The heat exchange structure including the supplemental heat absorption unit 60 may have a countercurrent heat exchange structure in which a low-temperature fluid and a high-temperature fluid flow oppositely. Alternatively, the heat exchange structure including the auxiliary heat absorption unit 60 can have a parallel flow type heat exchange structure in which a high-temperature fluid and a low-temperature fluid flow in parallel. The heat of the external medium (refrigerant etc.) flowing through the heat radiating pipe 91 </ b> B is transmitted to the auxiliary heat absorption unit 60.

  In the present embodiment, an external medium having a relatively high temperature (for example, about 55 ° C.) is selectively supplied to the auxiliary heat absorption unit 60, and an external medium having a relatively low temperature (for example, about 35 ° C.) is supplied to the heat absorption unit 11. Selectively supplied.

  Additionally or alternatively, the external medium used in one of the auxiliary heat absorption part 60 and the heat absorption part 11 can be used for the other. For example, an external medium that has been absorbed by the auxiliary heat absorption unit 60 and has fallen in temperature can be supplied to the heat absorption unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91A.

  Also in the present embodiment, since the heat pump system S2 includes a plurality of heat absorption units, it is possible to select a supply destination of the external medium according to the temperature level, and as a result, it is possible to flexibly cope with fluctuations in the heat source level.

  FIG. 3 is a schematic diagram showing a heat pump system S3 according to the third embodiment. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  As shown in FIG. 3, the heat pump system S3 includes a first supplementary heat absorption unit 60A, a second intermediate unit 40B, and a third intermediate unit 40C that are disposed between the first intermediate unit 40A and the second intermediate unit 40B. And the second supplemental heat absorption unit 60B. That is, in the present embodiment, the number of heat absorption parts including the auxiliary heat absorption parts 60A and 60B and the heat absorption part 11 is three.

  The auxiliary heat absorption parts 60A-60B are for transferring heat from an external medium to at least one of the working fluid toward the intermediate part 40 and the working fluid in the intermediate part 40. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption units 60A-60B, which is a place different from the heat absorption unit 11. In the present embodiment, the supplemental heat absorption part 60A is disposed between the expansion valve 24B and the second intermediate part 40B on the path between the first intermediate part 40A and the second intermediate part 40B. The auxiliary heat absorption part 60B is arranged between the expansion valve 24C and the third intermediate part 40C on the path between the second intermediate part 40B and the third intermediate part 40C.

  In the present embodiment, the auxiliary heat absorption unit 60A includes a conduit (part of a conduit on the main path of the heat pump 10) that is thermally connected to the heat radiating pipe 91B (part of the conduit of the external device 90) of the external device 90. . For example, both conduits are placed in contact with or adjacent to each other. In the present embodiment, the heat exchange structure is configured to include the auxiliary heat absorption part 60A and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91B of the external device 90 exchanges heat with the working fluid from the first intermediate portion 40A flowing through the auxiliary heat absorption unit 60A. The heat exchange structure including the auxiliary heat absorption part 60A can have a countercurrent heat exchange structure in which a low-temperature fluid and a high-temperature fluid flow oppositely. Alternatively, the heat exchange structure including the auxiliary heat absorption part 60A can have a parallel flow type heat exchange structure in which a high-temperature fluid and a low-temperature fluid flow in parallel. Similarly, the auxiliary heat absorption unit 60B includes a conduit (a part of the conduit of the main path of the heat pump 10) that is thermally connected to the heat radiating tube 91C of the external device 90. The heat of the external medium (refrigerant etc.) flowing through the heat radiating pipes 91B and 91C is transmitted to the auxiliary heat absorption parts 60A and 60B.

  In the present embodiment, a first high temperature (for example, about 55 ° C.) external medium is selectively supplied to the first supplemental heat absorption unit 60A, and a second high temperature (for example, about 45 ° C.) is supplied to the second supplemental heat absorption unit 60B. ) Is selectively supplied, and an external medium having a relatively low temperature (for example, about 35 ° C.) is selectively supplied to the heat absorbing unit 11.

  Additionally or alternatively, the external medium used in one of the first supplemental heat absorption unit 60A, the second supplemental heat absorption unit 60B, and the heat absorption unit 11 can be used for at least one of the other. That is, the external medium used in one auxiliary heat absorption part can be used in another auxiliary heat absorption part located further downstream. For example, an external medium that has been absorbed by the first auxiliary heat absorption unit 60A and has fallen in temperature can be supplied to the second auxiliary heat absorption unit 60B. Furthermore, the external medium that has been absorbed by the second supplemental heat absorption unit 60B and has fallen in temperature can be supplied to the heat absorption unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91C. Further, the outlet of the heat radiating pipe 91C can be fluidly connected to the inlet of the heat radiating pipe 91A.

  Also in the present embodiment, since the heat pump system S3 includes a plurality of heat absorption units, it is possible to select a supply destination of the external medium according to the temperature level, and as a result, it is possible to flexibly cope with fluctuations in the heat source level.

  FIG. 4 is a schematic diagram showing a heat pump system S4 according to the fourth embodiment. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  As shown in FIG. 4, the heat pump system S4 includes a first supplemental heat absorption unit 60A disposed between the heat dissipation unit 13 and the first intermediate unit 40A, and the first intermediate unit 40A and the second intermediate unit 40B. And a second supplemental heat absorption part 60B disposed between the second intermediate part 40B and the third intermediate part 40C. In other words, in the present embodiment, the number of heat absorption parts including the auxiliary heat absorption parts 60A, 60B, 60C and the heat absorption part 11 is four.

  The auxiliary heat absorption units 60 </ b> A to 60 </ b> C are for transferring heat from an external medium to at least one of the working fluid toward the intermediate unit 40 and the working fluid in the intermediate unit 40. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption units 60A-60C, which is a place different from the heat absorption unit 11. In the present embodiment, the supplemental heat absorption part 60A is arranged between the expansion valve 24A and the first intermediate part 40A on the path between the heat dissipation part 13 (intermediate heat exchange part 44) and the first intermediate part 40A. The The auxiliary heat absorption part 60B is arranged between the expansion valve 24B and the second intermediate part 40B on the path between the first intermediate part 40A and the second intermediate part 40B. The auxiliary heat absorption part 60C is disposed between the expansion valve 24C and the third intermediate part 40C on the path between the second intermediate part 40B and the third intermediate part 40C.

  In the present embodiment, the auxiliary heat absorption unit 60A includes a conduit (part of a conduit on the main path of the heat pump 10) that is thermally connected to the heat radiating pipe 91B (part of the conduit of the external device 90) of the external device 90. . For example, both conduits are placed in contact with or adjacent to each other. In the present embodiment, the heat exchange structure is configured to include the auxiliary heat absorption part 60A and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91B of the external device 90 exchanges heat with the working fluid from the first intermediate portion 40A flowing through the auxiliary heat absorption unit 60A. The heat exchange structure including the auxiliary heat absorption part 60A can have a countercurrent heat exchange structure in which a low-temperature fluid and a high-temperature fluid flow oppositely. Alternatively, the heat exchange structure including the auxiliary heat absorption part 60A can have a parallel flow type heat exchange structure in which a high-temperature fluid and a low-temperature fluid flow in parallel. Similarly, the auxiliary heat absorption unit 60B includes a conduit (a part of the conduit of the main path of the heat pump 10) that is thermally connected to the heat radiating tube 91C of the external device 90. In addition, supplemental heat absorption unit 60 </ b> C includes a conduit (a part of the conduit of the main path of heat pump 10) that is thermally connected to heat radiating pipe 91 </ b> D of external device 90. The heat of the external medium (refrigerant etc.) flowing through the heat radiating pipes 91B, 91C, 91D is transmitted to the auxiliary heat absorption units 60A, 60B, 60C.

  In the present embodiment, a first high temperature (for example, about 90 ° C.) external medium is selectively supplied to the first auxiliary heat absorption unit 60A, and a second high temperature (for example, about 70 ° C.) is supplied to the second auxiliary heat absorption unit 60B. ) External media is selectively supplied. Further, an external medium having a third high temperature (for example, about 50 ° C.) is selectively supplied to the third supplementary heat absorption unit 60C, and an external medium having a relatively low temperature (for example, about 35 ° C.) is selected for the heat absorption unit 11. Supplied.

  In addition or alternatively, the external medium used in one of the first auxiliary heat absorption unit 60A, the second auxiliary heat absorption unit 60B, the third auxiliary heat absorption unit 60C, and the heat absorption unit 11 is used for at least one of the other. be able to. For example, an external medium that has been absorbed by the first auxiliary heat absorption unit 60A and has fallen in temperature can be supplied to the second auxiliary heat absorption unit 60B. Furthermore, the external medium that has been absorbed by the second supplemental heat absorption unit 60B and has fallen in temperature can be supplied to the third supplemental heat absorption unit 60C. Furthermore, the external medium that has been absorbed by the third supplementary heat absorbing unit 60C and has fallen in temperature can be supplied to the heat absorbing unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91C. Further, the outlet of the heat radiating pipe 91C can be fluidly connected to the inlet of the heat radiating pipe 91A. Further, the outlet of the heat radiating pipe 91D can be fluidly connected to the inlet of the heat radiating pipe 91A.

  Also in the present embodiment, since the heat pump system S4 includes a plurality of heat absorption units, it is possible to select a supply destination of the external medium according to the temperature level, and as a result, it is possible to flexibly cope with fluctuations in the heat source level.

  FIG. 5 is a schematic diagram showing a heat pump system S5 according to the fifth embodiment. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  As shown in FIG. 5, in the heat pump system S <b> 5, the second intermediate portion 40 </ b> B has a function as the auxiliary heat absorption portion 60. In the present embodiment, the number of heat absorption parts including the auxiliary heat absorption part 60 and the heat absorption part 11 is two.

  The auxiliary heat absorption part 60 is for transferring heat from the external medium to the working fluid in the intermediate part 40. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption unit 60, which is a place different from the heat absorption unit 11.

  In the present embodiment, the supplemental heat absorption part 60 includes a container of the second intermediate part 40B that at least temporarily stores the working fluid. Inside the container, a heat radiating pipe 91B of the external device 90 (a part of the conduit of the external device 90) is disposed. In the present embodiment, the heat exchange structure is configured including the auxiliary heat absorption part 60 and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91B of the external device 90 exchanges heat with the working fluid in the auxiliary heat absorption unit 60 (second intermediate unit 40B). The heat of the external medium (refrigerant, etc.) flowing through the heat radiating pipe 91B is transmitted to the working fluid in the supplemental heat absorption part 60 (second intermediate part 40B).

  In the present embodiment, an external medium having a relatively high temperature (for example, about 55 ° C.) is selectively supplied to the auxiliary heat absorption unit 60, and an external medium having a relatively low temperature (for example, about 35 ° C.) is supplied to the heat absorption unit 11. Selectively supplied.

  Additionally or alternatively, the external medium used in one of the auxiliary heat absorption part 60 and the heat absorption part 11 can be used for the other. For example, an external medium that has been absorbed by the auxiliary heat absorption unit 60 and has fallen in temperature can be supplied to the heat absorption unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91A.

  Also in the present embodiment, since the heat pump system S5 includes a plurality of heat absorption units, it is possible to select a supply destination of the external medium according to the temperature level, and as a result, it is possible to flexibly cope with fluctuations in the heat source level.

  The system S1-S4 in FIGS. 1 to 4 has a separate type auxiliary heat absorption part 60 separated from the intermediate part 40, whereas the system S5 in FIG. 5 has an auxiliary heat absorption part 60 integrated with the intermediate part 40. Have The integrated auxiliary heat absorption part 60 is advantageous for making the system configuration compact.

  FIG. 6 is a schematic diagram showing a heat pump system S6 according to the sixth embodiment. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  As shown in FIG. 6, the heat pump system S6 includes an integrated first auxiliary heat absorption unit 60A and second auxiliary heat absorption unit for the first intermediate part 40A, the second intermediate part 40B, and the third intermediate part 40C, respectively. 60B and the 3rd supplement heat absorption part 60C. In the present embodiment, the number of heat absorbing parts including the auxiliary heat absorbing parts 60A, 60B, 60C and the heat absorbing part 11 is four.

  The auxiliary heat absorption parts 60A-60C are for transferring heat from the external medium to the working fluid in the intermediate parts 40A-40C. In other words, the working fluid can absorb the heat of the heat source (external medium) outside the cycle in the auxiliary heat absorption units 60A-60C, which is a place different from the heat absorption unit 11.

  In the present embodiment, the first supplemental heat absorption part 60A includes a container of the first intermediate part 40A that stores the working fluid at least temporarily. Inside the container, a heat radiating pipe 91B of the external device 90 (a part of the conduit of the external device 90) is disposed. In the present embodiment, a heat exchange structure is configured including the first supplemental heat absorption part 60A and the heat radiating pipe 91B. In the heat exchange structure, the external medium flowing through the heat radiating pipe 91B of the external device 90 exchanges heat with the working fluid in the first supplemental heat absorption part 60A (first intermediate part 40A). Similarly, the 2nd supplement heat absorption part 60B contains the container of 2nd intermediate part 40B. The third supplemental heat absorption part 60C includes a container of the third intermediate part 40C. The heat of the external medium (refrigerant, etc.) flowing through the heat radiating pipes 91B, 91C, 91D is transmitted to the working fluid in the auxiliary heat absorption parts 60A, 60B, 60C (intermediate parts 40A, 40B, 40C).

  In the present embodiment, a first high temperature (for example, about 90 ° C.) external medium is selectively supplied to the first supplemental heat absorption unit 60A, and a second high temperature (for example, about 70 ° C.) is supplied to the second supplemental heat absorption unit 60B. ) External media is selectively supplied. Further, an external medium having a third high temperature (for example, about 50 ° C.) is selectively supplied to the third supplementary heat absorption unit 60C, and an external medium having a relatively low temperature (for example, about 35 ° C.) is selected for the heat absorption unit 11. Supplied.

  In addition or alternatively, the external medium used in one of the first auxiliary heat absorption unit 60A, the second auxiliary heat absorption unit 60B, the third auxiliary heat absorption unit 60C, and the heat absorption unit 11 is used for at least one of the other. be able to. For example, an external medium that has been absorbed by the first auxiliary heat absorption unit 60A and has fallen in temperature can be supplied to the second auxiliary heat absorption unit 60B. Furthermore, the external medium that has been absorbed by the second supplemental heat absorption unit 60B and has fallen in temperature can be supplied to the third supplemental heat absorption unit 60C. Furthermore, the external medium that has been absorbed by the third supplementary heat absorbing unit 60C and has fallen in temperature can be supplied to the heat absorbing unit 11. In this case, the outlet of the heat radiating pipe 91B can be fluidly connected to the inlet of the heat radiating pipe 91C. Further, the outlet of the heat radiating pipe 91C can be fluidly connected to the inlet of the heat radiating pipe 91A. Further, the outlet of the heat radiating pipe 91D can be fluidly connected to the inlet of the heat radiating pipe 91A.

  Also in the present embodiment, since the heat pump system S6 has a plurality of heat absorbing units, it is possible to select a supply destination of the external medium according to the temperature level, and as a result, it is possible to flexibly cope with fluctuations in the heat source level.

  Although some embodiments have been described above, the present invention is not limited to these embodiments. The numerical value used in the above description is an example, and the present invention is not limited to this. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the appended claims.

  S1, S2, S3, S4, S5, S6 ... heat pump system, 10 ... heat pump (first unit), 11 ... heat absorption part, 12 ... compression part, 12A ... first compression part, 12B ... second compression part, 12C ... 3rd compression part, 12D ... 4th compression part, 13 ... Radiation part, 14 ... Expansion part, 15 ... Main path, 20 ... Supply unit (2nd unit), 24A, 24B, 24C ... Expansion valve (expansion part), 25 ... expansion valve (expansion part), 40 ... intermediate part, 40A ... first intermediate part, 40B ... second intermediate part, 40C ... third intermediate part, 44 ... intermediate heat exchange part, 60 ... auxiliary heat absorption part, 60A ... 1st supplementary heat absorption part, 60B ... 2nd supplemental heat absorption part, 60C ... 3rd supplemental heat absorption part, 70 ... Control apparatus, 90 ... External device, 91A, 91B, 91C, 91D ... Radiation pipe.

Claims (9)

A first unit in which a first fluid flows and includes a heat absorption unit, a compression unit, a heat dissipation unit, and an expansion unit, and a heat pump that pumps up heat of an external medium;
A second unit that includes a path through which the second fluid flows, and that outputs the second fluid that has received heat transferred from the first fluid;
The heat pump
An intermediate portion in which the first fluid from the heat radiating portion is at least temporarily stored, and the gas phase first fluid is supplied to the compression portion;
A high-temperature heat pump system, further comprising: an auxiliary heat absorption unit that transmits heat from the external medium to at least one of the first fluid heading toward the intermediate unit and the first fluid in the intermediate unit.   2. The high-temperature heat pump system according to claim 1, wherein the temperature of the external medium is different between the heat absorption unit and the auxiliary heat absorption unit.   3. The high temperature mold according to claim 1, wherein a supply destination of the external medium is selected between the heat absorption unit and the auxiliary heat absorption unit according to a temperature of the external medium. Heat pump system.   The external medium used in the supplementary heat absorption unit is used in one of another supplemental heat absorption unit and the heat absorption unit located further downstream, according to any one of claims 1 to 3. High temperature type heat pump system.   The high-temperature heat pump system according to any one of claims 1 to 4, wherein the auxiliary heat absorption part is disposed substantially integrally with the intermediate part.   The high-temperature heat pump system according to any one of claims 1 to 4, wherein the supplementary heat absorption part is disposed substantially separately from the intermediate part before the intermediate part.   The heat further from the first fluid toward the intermediate portion further includes an intermediate heat exchange portion that is transferred to the first fluid in the middle of the compression portion or before inflow. The high temperature type heat pump system according to any one of the above.   The high-temperature heat pump system according to any one of claims 1 to 7, wherein a path of the first fluid changes according to a heat level of the external medium.   The high-temperature heat pump system according to any one of claims 1 to 8, wherein the heat pump can be partially operated according to a heat level of the external medium.

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