CN103415749A - Binary refrigeration cycle device - Google Patents
Binary refrigeration cycle device Download PDFInfo
- Publication number
- CN103415749A CN103415749A CN2012800124732A CN201280012473A CN103415749A CN 103415749 A CN103415749 A CN 103415749A CN 2012800124732 A CN2012800124732 A CN 2012800124732A CN 201280012473 A CN201280012473 A CN 201280012473A CN 103415749 A CN103415749 A CN 103415749A
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- Prior art keywords
- heat exchanger
- temperature
- refrigeration cycle
- high temperature
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 70
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 46
- 230000005494 condensation Effects 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000004087 circulation Effects 0.000 claims description 4
- 230000037361 pathway Effects 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009183 running Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
- F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/227—Temperature of the refrigerant in heat pump cycles
- F24H15/232—Temperature of the refrigerant in heat pump cycles at the condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/258—Outdoor temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/375—Control of heat pumps
- F24H15/385—Control of expansion valves of heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/375—Control of heat pumps
- F24H15/38—Control of compressors of heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Other Air-Conditioning Systems (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
This binary refrigeration cycle device has: a low-temperature-side refrigeration cycle provided with a low-temperature-side compressor and a heat-source-side heat exchanger that absorbs heat from an external heat source; a high-temperature-side refrigeration cycle provided with a high-temperature-side compressor and a use-side heat exchanger that supplies heat to the use side; an intermediate heat exchanger for exchanging heat between the refrigerants of the low-temperature-side refrigeration cycle and the high-temperature-side refrigeration cycle; a casing that is loaded with at least the use-side heat exchanger; use-side piping that is loaded in the casing, is connected to the use-side heat exchanger, causes heat exchange and supply to the use side of a use-side fluid flowing through and the refrigerant of the high-temperature-side refrigeration cycle; a bypass pathway that is connected in parallel to the use-side piping and the use-side heat exchanger, and that sends the use-side fluid at the use-side heat exchanger exit side of the use-side piping to the use-side heat exchanger entrance side; and a fluid control means that controls the flow of the use-side fluid flowing within the bypass pathway.
Description
Technical field
Embodiments of the present invention relate to the binary refrigeration EGR.
Background technology
On the refrigerating circulatory devices such as air regulator, Teat pump boiler, for to heat utilization machine supplying high temperature heat, sometimes can use the binary refrigeration EGR that possesses low temperature side kind of refrigeration cycle and high temperature side kind of refrigeration cycle.
The low temperature side kind of refrigeration cycle of binary refrigeration EGR and high temperature side kind of refrigeration cycle, have compressor, expansion gear etc. separately, connects in the mode that can carry out heat exchange by intermediate heat exchanger.Then, make the heat drawn by the heat exchanger of the heat source side as the low temperature side evaporimeter arranged on the low temperature side kind of refrigeration cycle, via on the high temperature side kind of refrigeration cycle, arrange as the high temperature side condenser utilize the side heat exchanger, the heat of high temperature is offered to the heat utilization machine.
The prior art document
Patent documentation
[patent documentation 1] Japanese kokai publication hei 08-189714 communique
Summary of the invention
[problem to be addressed by invention]
But, as everyone knows, if it is lower from the heat utilization device, to flow into the temperature of (the utilizing side) fluid utilize the side heat exchanger, the compression ratio of high temperature side kind of refrigeration cycle can descend, the reliability of compressor also can descend, and meanwhile the reliability of refrigerating circulatory device itself can reduce.
The present invention proposes for addressing the above problem, and according to the embodiment of the present invention, provides a kind of reliability decrease problem that solves compressor, and then solves the binary refrigeration EGR of the reliability decrease problem of refrigerating circulatory device.
[solving the unit of problem]
The binary refrigeration EGR that embodiments of the present invention relate to possesses: from the low temperature side kind of refrigeration cycle of external heat source absorption heat, to utilizing side supply the high temperature side kind of refrigeration cycle of heat and make the low temperature side kind of refrigeration cycle and the intermediate heat exchanger of the cold-producing medium generation heat exchange of described high temperature side kind of refrigeration cycle.
Utilize on the side heat exchanger and dispose, make to utilize after the cold-producing medium generation heat exchange of side liquid and high temperature side kind of refrigeration cycle be supplied to utilize side utilize the side pipe road.In addition, be provided with the housing that utilizes the side heat exchanger has been installed at least.This housing is equipped with bypass channel, this bypass channel with utilize the side heat exchanger to be connected in side by side to utilize the side pipe road, make to utilize the side pipe road utilize side heat exchanger outlet side utilize side liquid to be circulated to utilize side heat exchanger entrance side.And, be provided with the fluid control module flowed that utilizes side liquid that is controlled at circulation in bypass channel.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the binary refrigeration EGR that relates to of embodiments of the present invention.
Fig. 2 is the controller that relates to of embodiments of the present invention and the block diagram of Zhou side machine thereof.
Fig. 3 is the flow chart of the control that relates to of embodiments of the present invention.
The specific embodiment
Below, use accompanying drawing to describe embodiments of the present invention.
(the 1st embodiment)
Use Fig. 1 to describe the 1st embodiment.
As shown in Figure 1, the low temperature side kind of refrigeration cycle 6a of the binary refrigeration EGR 100 of this example, high temperature side kind of refrigeration cycle 6b are forming by the mode that intermediate heat exchanger 5 carries out heat exchange.
Binary refrigeration EGR 100 has the 1st housing 8a and the 2nd housing 8b.
By refrigerant tubing, is connected with successively in the 1st housing 8a: low temperature side compressor 1a, the low temperature side cross valve 2a be connected with low temperature side compressor 1a by refrigerant tubing, and the air (external heat source) of the outside heat source side heat exchanger 3, the low temperature side expansion gear 4a that carry out heat exchange.In addition, low temperature side cross valve 2a and low temperature side expansion gear 4a, be connected with communicating pipe 9a, 9b separately, and the intermediate heat exchanger 5 that this communicating pipe 9a, 9b are located at the 2nd housing 8b connects.
On heat source side heat exchanger 3, be provided with air blast 11, in order to the heat exchange of promotion with extraneous air.In addition, on heat source side heat exchanger 3, be provided with the external air temperature sensor 16 as the external heat source temperature detecting unit, in order to detect the temperature that is supplied to the extraneous air of heat source side heat exchanger 3 by air blast 11.
In the 2nd housing 8b, by refrigerant tubing, be connected with high temperature side compressor 1b, the high temperature side cross valve 2b be connected with high temperature side compressor 1b, intermediate heat exchanger 5, high temperature side expansion gear 4a in turn, utilize side heat exchanger 7, form high temperature side kind of refrigeration cycle 6b.
Entrance side and outlet side at the refrigerant tubing that utilizes side heat exchanger 7, be provided with high temperature side refrigerant temperature sensors 17a, 17b as the refrigerant temperature detecting unit, utilize the refrigerant temperature of side heat exchanger 7 and the refrigerant temperature of outflow in order to detect to flow into.
Here, on intermediate heat exchanger 5, be connected with filler valve 21a, the 21b that can be connected with communicating pipe 9a, 9b, this filler valve 21a, 21b are upper forms low temperature side kind of refrigeration cycle 6a owing to being connected with communicating pipe 9a, 9b, can carry out heat exchange via intermediate heat exchanger 5 low temperature side kind of refrigeration cycle 6a and high temperature side kind of refrigeration cycle 6b.
In low temperature side kind of refrigeration cycle 6a and high temperature side kind of refrigeration cycle 6b, be packaged with separately the cold-producing medium of different qualities.
The kind of the cold-producing medium of encapsulation is according to the purposes of binary refrigeration EGR 100 and different, such as, utilize side heat exchanger 7 as water heat exchanger in order to nearly to produce in the situation of high-temperature heat-pump water-heater of hot water of 90 ℃, the low temperature side cold-producing medium used in low temperature side kind of refrigeration cycle 6a is preferably similar R410A's, even the circulating refrigerant of superperformance is also arranged under temperature (15 ℃ of left and right) outside low, the high temperature side refrigerant used in high temperature side kind of refrigeration cycle 6b is preferably similar R134a's, the circulating refrigerant that also has superperformance under high temperature (95 ℃ of left and right).
Utilize on side heat exchanger 7 to be connected with and utilize side liquid pipeline 18, this purposes of utilizing side liquid pipeline 18 is that the heat will drawn by binary refrigeration EGR 100 is supplied to the heat utilization machine that utilizes this heat.
And entrance side branching portion 12a directly is connected by bypass channel 13 with outlet side branching portion 12b, with respect to utilizing side pipe road 18, bypass channel 13 with utilize side heat exchanger 7 to be connected in parallel.On the middle part of bypass channel 13, be provided with flow control valve 14.
Fluid control module in this example passes through to control the aperture of flow control valve 14, thereby is controlled at the flow that utilizes side liquid of bypass channel 13 interior circulations.
When making to utilize side liquid to flow, at entrance side branching portion 12a with utilize between side heat exchanger 7 the stream pump 10 that send arranged to come into operation, from connector body 23a flow through successively entrance side branching portion 12a, utilize side heat exchanger 7, outlet side branching portion 12b will utilize side liquid to send to flow to connector body 23b.Utilize the side liquid flow direction as shown in the dotted arrow of Fig. 1.
Due to entrance side branching portion 12a and utilize between side heat exchanger 7 be provided with send stream pump 10.Therefore, the flow direction that utilizes side liquid in the bypass channel 13 when flow control valve 14 is opened is for flowing to the direction of entrance side branching portion 12a from outlet side branching portion 12b.In addition, entrance side branching portion 12a, outlet side branching portion 12b, send stream pump 10, bypass channel 13 to be installed on the 2nd housing 8b.
Utilizing sending stream pump 10 and utilizing in the interval between side heat exchanger 7 cooling-water temperature sensor 15 be provided with as utilizing the side liquid temperature detecting unit of side liquid pipeline 18, flow in order to detect the temperature of utilizing side liquid of utilizing side heat exchanger 7.
Utilize in side liquid pipeline 18 and be packaged with to the hot warm water of supplying of heat utilization machine or salt solution etc. in the mode that can circulate.
External air temperature sensor 16, high temperature side refrigerant temperature sensors 17a, 17b and cooling-water temperature sensor 15 are connected with controller 23, in order to the refrigerant temperature that detects outdoor temperature, high temperature side kind of refrigeration cycle and flow into the temperature that the warm water that utilizes side heat exchanger 7 or salt solution etc. utilize side liquid.
The 2nd housing 8b possesses the electrical box 22 of controlling 100 runnings of binary refrigeration EGR.
The flow process of the cold-producing medium during the 100 heating operation of binary refrigeration EGR is as shown in the solid arrow of Fig. 1.
At first, in low temperature side kind of refrigeration cycle 7, the low temperature side cold-producing medium successively by low temperature side stream, low temperature side expansion gear 4a and the heat source side heat exchanger 3 of low temperature side cross valve 2, intermediate heat exchanger 5, then returns to low temperature side compressor 1a from low temperature side cross valve 2 from low temperature side compressor 1a.Equally, in high temperature side kind of refrigeration cycle 6b, via the high temperature side cold-producing medium of high temperature side compressor 1b compression successively by high temperature side cross valve 2b, utilize the high temperature side stream of side heat exchanger 7, high temperature side expansion gear 4b and intermediate heat exchanger 5, then from high temperature side cross valve 2b, return to high temperature side compressor 1b.
At this moment, the low temperature side cold-producing medium evaporates by heat source side heat exchanger 3, and condenses at the low temperature side of intermediate heat exchanger 5.In addition, the high temperature side cold-producing medium condenses in utilizing side heat exchanger 7, and by warm warm water or the salt solution in side pipe road 18 that utilizes that utilizes side that is supplied to, high temperature side stream at intermediate heat exchanger 5, to evaporate by the aqueous cold-producing medium of high temperature side expansion gear 4b decompression, and the heat of condensation of absorption low temperature side cold-producing medium is as heat of evaporation.
Utilize interior the flowing in side pipe road 18 to have by sending stream pump 10 to be sent the side liquid that utilizes of stream.
At this, if flow into, utilize the temperature of utilizing side liquid of side heat exchanger 7 obviously very low, utilize that the temperature of the high temperature side cold-producing medium of side heat exchanger 7 can become lower than set point of temperature Tb1, the compression ratio of high temperature side compressor 1b can descend.If move compressor under the state that compression ratio descends, the reliability of compressor can descend to some extent.
On the controller 23 of the electrical box 22 interior settings of binary refrigeration EGR 100, as shown in the block diagram of Fig. 2, be connected with cooling-water temperature sensor 15, external air temperature sensor 16, high temperature side refrigerant temperature sensors 17a, 17b and flow control valve 14.
If lower to the temperature of utilizing side liquid of utilizing 7 supplies of side heat exchanger from the heat utilization machine, the flow control valve of bypass channel 13 14 is opened, make from utilizing the side liquid that utilizes that side heat exchanger 7 flows out to send and flow to entrance side branching portion 12a via bypass channel 13 from outlet side branching portion 12b, again with from connector body 23a flow into and utilize the side liquid that utilizes of side heat exchanger 7 to mix, make it to utilize side heat exchanger 7 as the side liquid inflow that utilizes of medium temperature.
Secondly, about the control of controller 23 for flow control valve 14, describe with reference to the flow chart of Fig. 3.
At first, in service at binary refrigeration EGR 100, the judgement (step S201) that controller 23 will carry out is: the outdoor temperature T0 that external air temperature sensor 16 detects be arranged on the utilizing of the entrance side that utilizes side heat exchanger 7 poor (Tw-T0) that the side liquid temperature sensor detects the 15 temperature T w that utilize side liquid that detect with no below set point of temperature Ta.
At this, if the temperature difference of the outdoor temperature T0 detected and the temperature T w that utilizes side liquid is than the temperature T a of regulation large (step S201's is no), the flow control valve 14 of bypass channel 13 cuts out (step S205), utilizes side liquid all to be sent to flow to the heat utilization machine from what utilize that side heat exchanger 7 flows out.
On the other hand, if the outdoor temperature T0 detected and the temperature difference (step S201 is) below set point of temperature Ta of utilizing the temperature T w of side liquid, the flow control valve 14 of bypass channel 13 is with certain aperture open (step S202), from utilize a part of utilizing side liquid that side heat exchanger 7 flows out by bypass channel 13 send flow to utilize side heat exchanger 7 utilize the side liquid entrance.Therefore, mix with the side liquid that utilizes of low temperature by the supply of heat utilization machine from the side liquid that utilizes that utilizes high temperature that side heat exchanger 7 flows out, become medium temperature and flow into and utilize side heat exchanger 7.
Then, calculate by two high temperature side refrigerant temperature sensors 17a, the inflow side that utilizes side heat exchanger 7 that 17b detects and the high temperature side refrigerant temperature Ts1 of outflow side, the mean temperature of Ts2, using the large approximate number of this mean temperature as the adiabatic condensation temperature Ts of high temperature side cold-producing medium.Then, carry out whether adiabatic condensation temperature Ts is in to the judgement (step S203, S204) in the scope of set point of temperature Tb1～Tb2(Tb1<Tb2).
Namely, judge that the adiabatic condensation temperature Ts of high temperature side cold-producing medium is whether more than Tb1 (step S203), if the adiabatic condensation temperature Ts of high temperature side cold-producing medium, than Tb1 low (step S203's is no), increases the aperture (step S206) of flow control valve 14, then, return to step S203.
On the other hand, as the adiabatic condensation temperature Ts of high temperature side cold-producing medium (step S203 is) when Tb1 is above, judge whether the adiabatic condensation temperature Ts of high temperature side cold-producing medium is in Tb2 following (step S204).If the adiabatic condensation temperature Ts of high temperature side cold-producing medium than Tb2 high (step S204's is no), makes the aperture of flow control valve 14 reduce (step S207) and return to step S203.
After this, if utilize the adiabatic condensation temperature Ts of the high temperature side cold-producing medium of side heat exchanger 7 be in the scope of set point of temperature Tb1～Tb2 (step S203 be and step S204 be), the aperture of flow control valve 14 continues to remain unchanged and returns to step S201.
As mentioned above, according to the outside air temperature of external heat source with flow into the temperature difference of utilizing the side liquid temperature of utilizing the side heat exchanger, when if judgement meets the temperature conditions of low compression ratio operation, flow control valve 14 is opened, to the side liquid that utilizes be supplied to after utilizing utilizing in side liquid of side heat exchanger 7 to mix to heat, by making to flow into, utilize the temperature of utilizing side liquid of side heat exchanger to raise, thereby can evade the temperature conditions that becomes the low compression ratio operation.
And, by detection, utilize the temperature of the high temperature side cold-producing medium in side heat exchanger 7, determine whether the low compression ratio operation, and, by controlling the aperture of the flow control valve 14 arranged on bypass channel 13, can make to rise to the most applicable temperature of avoiding the low compression ratio operation to the temperature of utilizing side liquid of utilizing 7 supplies of side heat exchanger.
By above-mentioned formation with control, can suppress to utilize the adiabatic condensation temperature of side heat exchanger 7 to descend, thereby suppress compression ratio, descend.Thus, can prevent that the compressor reliability caused due to the low compression ratio state from descending, and then, can prevent that the reliability of binary refrigeration EGR 100 from reducing.
The same with above-mentioned embodiment, due to the 1st housing and the 2nd housing are separately formed to binary refrigeration EGR 100, so can be corresponding flexibly according to the state of installation site.For example, can not guarantee fully outdoorly when space is set, also the 1st housing with heat source side heat exchanger 3 can be configured in outdoorly, will have and utilize the 2nd housing of side heat exchanger to be configured in indoor.
In addition, in the above-described embodiment, although low temperature side housing 8a and high temperature side housing 8b also are not limited only to this for forming respectively, can be also in a housing, to possess the configuration of high temperature side kind of refrigeration cycle and low temperature side kind of refrigeration cycle.
In addition, in the above-described embodiment, although be that the control aperture that the fluid control module of the flow that utilizes side liquid of bypass channel 13 is made as flow control valve 14 of flowing through is controlled, also can use other control module.For example, can be also that making at least one side is three-way valve in entrance side branching portion 12a and outlet side branching portion 12b, as flow control valve, control the aperture of three-way valve.
The invention is not restricted to above-mentioned embodiment.In addition, the disclosed a plurality of inscapes in the combination embodiment of the present invention of passing through that can also be suitable form various inventions.For example, also can delete the several inscapes in disclosed all inscapes in embodiment of the present invention.And, also can suitably the inscape the embodiment from different be combined.
Symbol description
1a ... the low temperature side compressor,
1b ... the high temperature side compressor,
2a ... the low temperature side cross valve,
2b ... the high temperature side cross valve,
3 ... the heat source side heat exchanger,
4a ... the low temperature side expansion gear,
4b ... the high temperature side expansion gear,
5 ... intermediate heat exchanger,
6a ... the low temperature side kind of refrigeration cycle,
6b ... the high temperature side kind of refrigeration cycle,
7 ... utilize the side heat exchanger,
8a ... the low temperature side housing,
8b ... the high temperature side housing,
9a, 9b ... communicating pipe,
10 ... send the stream pump,
12a ... the entrance side branching portion,
12b ... the outlet side branching portion,
13 ... bypass channel,
22 ... electrical box,
15 ... utilize the side temperature detecting unit,
16 ... the outside air temperature sensor,
17a, b17 ... the high temperature side refrigerant temperature sensors,
18 ... utilize the side pipe road,
100 ... the binary refrigeration EGR
Claims (4)
1. a binary refrigeration EGR, is characterized in that, comprising:
Low temperature side kind of refrigeration cycle, described low temperature side kind of refrigeration cycle comprise heat source side heat exchanger and the low temperature side compressor that absorbs heat from external heat source;
High temperature side kind of refrigeration cycle, described high temperature side kind of refrigeration cycle comprise to what utilize side supply heat utilizes side heat exchanger and high temperature side compressor;
Intermediate heat exchanger, described intermediate heat exchanger in described low temperature side kind of refrigeration cycle cold-producing medium and the cold-producing medium in described high temperature side kind of refrigeration cycle between heat-shift;
Housing, the described at least side heat exchanger that utilizes is installed to described housing;
Utilize the side pipe road, be arranged at described housing, and be connected to the described side heat exchanger that utilizes, so as circulation utilize side liquid and high temperature side kind of refrigeration cycle in cold-producing medium between heat-shift, and described heat is fed to the described side of utilizing;
Bypass channel, described bypass channel and the described side heat exchanger that utilizes are parallel-connected to the described side pipe road that utilizes, in order to the described ducted described side liquid that utilizes of side that utilizes is utilized to side heat exchanger entrance side from utilizing side heat exchanger outlet side to be fed to; And
Fluid control module, described fluid control module are controlled at described the mobile of side liquid that utilize circulated in described bypass channel.
2. binary refrigeration EGR according to claim 1, is characterized in that,
What described fluid control module was controlled at circulation in described bypass channel utilizes flowing of side liquid, with the adiabatic condensation temperature of the cold-producing medium of avoiding described high temperature side kind of refrigeration cycle descend, the high temperature side compressor moves under low compression ratio.
3. binary refrigeration EGR according to claim 1, is characterized in that,
What described fluid control module inclusion test flowed into the described described temperature of utilizing side liquid of utilizing the side heat exchanger utilizes the side liquid temperature detecting unit, be arranged on the external heat source temperature detecting unit of described heat source side heat exchanger with the temperature that detects described external heat source, and the flow control valve that changes the flow in described bypass channel, and control described fluid control module, while with the difference between the described described described temperature of utilizing the described temperature of side liquid and the described external heat source that described external heat source temperature detecting unit detects of utilizing that the side liquid temperature detecting unit detects of box lunch, being equal to or less than predetermined value, open described flow control valve.
4. binary refrigeration EGR according to claim 1, is characterized in that,
Described fluid control module inclusion test flows into the refrigerant temperature detecting unit of temperature of the described cold-producing medium in the described described high temperature side kind of refrigeration cycle of utilizing the side heat exchanger and the flow control valve that changes the flow in described bypass channel, and when the condensation temperature of the described cold-producing medium in the described high temperature side kind of refrigeration cycle that described refrigerant temperature detecting unit detects during lower than predetermined temperature, described fluid control module is controlled, to increase the aperture of described flow control valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2011-051306 | 2011-03-09 | ||
| JP2011051306 | 2011-03-09 | ||
| PCT/JP2012/055951 WO2012121326A1 (en) | 2011-03-09 | 2012-03-08 | Binary refrigeration cycle device |
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| Publication Number | Publication Date |
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| CN103415749A true CN103415749A (en) | 2013-11-27 |
| CN103415749B CN103415749B (en) | 2015-09-09 |
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| CN201280012473.2A Active CN103415749B (en) | 2011-03-09 | 2012-03-08 | Binary refrigeration cycle device |
Country Status (5)
| Country | Link |
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| EP (1) | EP2672204B1 (en) |
| JP (1) | JP5681787B2 (en) |
| KR (1) | KR101510978B1 (en) |
| CN (1) | CN103415749B (en) |
| WO (1) | WO2012121326A1 (en) |
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| CN111595000A (en) * | 2020-05-18 | 2020-08-28 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device of hydraulic module of air conditioning system and storage medium |
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| JP6910210B2 (en) | 2017-02-03 | 2021-07-28 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
| FR3082606B1 (en) * | 2018-06-13 | 2020-07-03 | Lacaze Energies | THERMAL TRANSFER MODULE FOR THE PRODUCTION OF HOT WATER |
| CN116568972A (en) * | 2020-12-01 | 2023-08-08 | 大金工业株式会社 | Refrigeration cycle system |
| JP7235998B1 (en) | 2021-09-30 | 2023-03-09 | ダイキン工業株式会社 | Cascade unit and refrigeration cycle equipment |
| JP7265193B2 (en) * | 2021-09-30 | 2023-04-26 | ダイキン工業株式会社 | Cascade unit and refrigeration cycle equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012121326A1 (en) | 2012-09-13 |
| EP2672204B1 (en) | 2017-07-05 |
| KR101510978B1 (en) | 2015-04-10 |
| EP2672204A4 (en) | 2015-06-17 |
| CN103415749B (en) | 2015-09-09 |
| JPWO2012121326A1 (en) | 2014-07-17 |
| JP5681787B2 (en) | 2015-03-11 |
| EP2672204A1 (en) | 2013-12-11 |
| KR20130116360A (en) | 2013-10-23 |
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