WO2014061105A1 - プレート式熱交換器及びこのプレート式熱交換器を備えた冷凍サイクル装置 - Google Patents
プレート式熱交換器及びこのプレート式熱交換器を備えた冷凍サイクル装置 Download PDFInfo
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- WO2014061105A1 WO2014061105A1 PCT/JP2012/076726 JP2012076726W WO2014061105A1 WO 2014061105 A1 WO2014061105 A1 WO 2014061105A1 JP 2012076726 W JP2012076726 W JP 2012076726W WO 2014061105 A1 WO2014061105 A1 WO 2014061105A1
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- fluid
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- heat exchanger
- heat transfer
- groove
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/06—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
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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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
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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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
- F28D2021/007—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
- F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
Definitions
- the present invention relates to a plate heat exchanger and a refrigeration cycle apparatus including the plate heat exchanger.
- a plurality of heat transfer plates are stacked between two side plates at a predetermined interval, and a first flow path and a second flow path through which a first fluid flows in a space formed between these heat transfer plates.
- a plate-type heat exchanger in which second flow paths through which fluid flows are alternately formed has been proposed.
- such a conventional plate type heat exchanger has been proposed in which an inner fin is provided in the flow path.
- a plurality of heat transfer plates 1, 1. Are laminated so as to form the first flow paths 2, 2,... And the second flow paths 3, 3,... Adjacent to each other between the heat transfer plates 1, 1,.
- the core portion 1 of the oil cooler has a plurality of first core plates 5 and second cores having a common basic shape.
- the oil flow paths 7 and the cooling water flow paths 8 are alternately formed between the core plates 5 and 6.
- the oil flow paths 7 include fin plates 11 respectively.
- the first core plate 5 has a first protrusion 31 and the second core plate 6 has a second protrusion 32 so as to swell outward as viewed from the oil flow path 7.
- JP 2003-185375 A (Summary, FIG. 1) JP 2011-007410 A (summary, FIG. 9) JP 2003-294382 A (summary, FIG. 2)
- the heat exchangers described in Patent Documents 1 to 3 have the following problems.
- the plate-type heat exchanger described in Patent Document 1 has a flat (flat) range facing (contacting) the heat transfer surface of the heat transfer plate and the heat transfer surface of the inner fin.
- the liquid film of the condensate is likely to be formed in the flow path through which the first fluid flows in a range facing (in contact with) the heat transfer surface of the heat transfer plate and the heat transfer surface of the inner fin. For this reason, there is a problem that this liquid film becomes a thermal resistance and the heat transfer rate from the first fluid to the second fluid is lowered.
- the plate-type heat exchanger described in the cited document 2 has ridges (ridges 31 and 32) formed on the heat transfer surface of the heat transfer plate. Also, an inclined groove (inclined groove 7) is formed on the heat transfer surface of the flat tube. For this reason, these heat exchangers form a liquid film in a range opposite to (in contact with) the heat transfer surface of the heat transfer plate and the heat transfer surface of the inner fin as compared with the plate heat exchanger described in Patent Document 1. It can be suppressed.
- the plate-type heat exchanger described in the cited document 2 has the ridge portion formed perpendicular to the flow direction of the first fluid, so that the liquid condensate of the condensate held by the ridge portion is low. bad.
- the plate-type heat exchanger described in the cited document 2 has a problem that the condensate staying in the ridge portion becomes a thermal resistance, and the heat transfer rate from the first fluid to the second fluid decreases. there were.
- the inclined groove is inclined with respect to the flow direction of the first fluid, and is formed intermittently. For this reason, in the heat exchanger described in the cited document 3, the condensate retained in the inclined groove tends to stay, and the staying condensate becomes thermal resistance. Therefore, similarly to the plate heat exchanger described in Patent Document 2, the heat exchanger described in the cited document 3 has a problem that the heat transfer rate from the first fluid to the second fluid decreases. It was.
- the present invention has been made to solve the above-described problems, and can suppress a decrease in heat transfer coefficient due to the formation of a liquid film of the condensate, and a decrease in heat transfer coefficient due to the stay of the condensate. It is an object of the present invention to obtain a plate-type heat exchanger that can also suppress the refrigeration cycle apparatus including the heat exchanger.
- the plate heat exchanger includes a plurality of heat transfer plates each having a flat heat transfer surface formed between two side plates at a predetermined interval, and the side plates and the heat transfer are stacked.
- the first fluid inlet and outlet and the second fluid inlet and outlet different from the first fluid alternately
- the first flow path through which the first fluid flows and the second flow path through which the second fluid flows are alternately formed, and at least the first flow path is in a range facing the heat transfer surface.
- a plate-type heat exchanger provided with inner fins, wherein an installation range of the inner fins in the first flow path includes a range facing the heat transfer plate in the inner fins, and the heat transfer plate At least one of The small plurality of grooves than the dimension between the fins of the inner fin is one that is formed along the flow direction of the first fluid.
- the refrigeration cycle apparatus according to the present invention includes the plate heat exchanger according to the present invention.
- the present invention for example, when the first fluid (for example, refrigerant) condenses from vapor to liquid in the first flow path provided with the inner fin, the condensed liquid film of the first fluid is held in the concave groove, The fluid condensate film can be concentrated in the groove. For this reason, this invention can suppress that a liquid film is formed in the range facing the heat-transfer surface of a heat-transfer plate, and the heat-transfer surface of an inner fin.
- the present invention can thin the condensate film of the first fluid formed in a range facing (contacting) the heat transfer surface of the heat transfer plate and the heat transfer surface of the inner fin. Therefore, the present invention can improve the heat transfer rate from the first fluid to the second fluid.
- the concave groove is formed along the flow direction of the first fluid. For this reason, the condensate of the 1st fluid currently hold
- FIG. 1 It is a disassembled perspective view which shows the conventional plate type heat exchanger. It is a perspective view which shows the inner fin provided in the conventional plate type heat exchanger. It is sectional drawing which shows the conventional plate type heat exchanger. It is the V section enlarged view of FIG. It is a principal part enlarged view of the plate heat exchanger which concerns on Embodiment 1 of this invention, and is an enlarged view of the position corresponded to the V section of FIG. It is a perspective view which shows the heat-transfer plate and inner fin of the plate heat exchanger which concern on Embodiment 1 of this invention. It is the W section enlarged view of FIG. It is a perspective view which shows the heat-transfer plate of the plate heat exchanger which concerns on Embodiment 1 of this invention.
- Embodiment 1 FIG.
- the plate heat exchanger 100 according to the first embodiment is provided with an inner fin 6 in the flow path.
- the plate heat exchanger 100 according to the first embodiment is characterized in that the groove 8 is formed in the inner fin 6 and the groove 9 is formed in the heat transfer plate 7.
- the conventional general plate heat exchanger 200 that is, the concave groove 8 according to the first embodiment 8).
- 9 is not described.
- the plate heat exchanger 100 according to the first embodiment will be described in comparison with the conventional plate heat exchanger 200.
- the same reference numerals are given to the configurations that perform the same functions.
- FIG. 1 is an exploded perspective view showing a conventional plate heat exchanger.
- FIG. 2 is a perspective view showing an inner fin provided in the plate heat exchanger.
- FIG. 3 is a sectional view showing this plate heat exchanger.
- FIG. 4 is an enlarged view of a portion V in FIG.
- FIG. 3 is a cross-sectional view taken along a cross section perpendicular to the flow direction of the fluid flowing in the flow path formed between the heat transfer plates.
- A shown in FIGS. 1 and 4 indicates the flow direction of the first fluid
- “B” shown in FIGS. 1 and 4 indicates the flow direction of the second fluid.
- the plate heat exchanger 200 includes a heat transfer plate 7 in which a flat (flat) heat transfer surface is formed between two side plates 5 that function to reinforce the plate heat exchanger 200.
- a plurality of layers are stacked at intervals.
- the two side plates 5 are formed in a rectangular shape, for example.
- the one side plate 5 is formed with an inlet 1 for the first fluid, an outlet 2 for the first fluid, an inlet 3 for the second fluid, and an outlet 4 for the second fluid at the four corners.
- pipes are connected to the first fluid inlet 1, the first fluid outlet 2, the second fluid inlet 3, and the second fluid outlet 4.
- the end direction of the side plate 5 will be referred to as the x axis
- the longitudinal direction of the side plate 5 will be described as the y direction.
- the heat transfer plate 7 is composed of two types of heat transfer plates (a heat transfer plate 7a and a heat transfer plate 7b).
- the heat transfer plates 7 a and the heat transfer plates 7 b are alternately arranged between the two side plates 5.
- the heat transfer plate 7a and the heat transfer plate 7b are rectangular like the side plate 5, and the heat transfer surface is formed flat (flat).
- the heat transfer plate 7a and the heat transfer plate 7b are, like the side plate 5, at the four corners thereof, the first fluid inlet 1, the first fluid outlet 2, the second fluid inlet 3, and The second fluid outlet 4 is formed (hereinafter, the heat transfer plate 7a and the heat transfer plate 7b are collectively referred to as the heat transfer plate 7).
- the heat transfer plate 7a has a shape in which a peripheral edge portion, a first fluid inlet 1 and a first fluid outlet 2 protrude.
- the heat transfer plate 7a is configured to separate the flow path through which the second fluid inlet 3 and the second fluid outlet 4 communicate with each other from the first fluid inlet 1 and the first fluid outlet 2.
- the heat transfer plate 7b has a shape in which a peripheral edge portion, a second fluid inflow port 3 and a second fluid outflow port 4 protrude. That is, the heat transfer plate 7b has a configuration in which the flow path through which the first fluid inlet 1 and the first fluid outlet 2 communicate with each other and the second fluid inlet 3 and the second fluid outlet 4 are separated from each other.
- the first flow path 11 through which the first fluid flows and the second flow path 12 through which the second fluid flows are alternately formed.
- the Rukoto As shown in FIGS. 1 and 4, the first fluid flowing through the first flow path 11 flows from the upper side to the lower side in FIG. 1 along the y axis, and flows through the second flow path 12. The fluid will flow from the lower side to the upper side in FIG. 1 along the y-axis. That is, the first fluid and the second fluid are counterflows.
- inner fins 6 are provided in both the first flow path 11 and the second flow path 12 of the plate heat exchanger 200 in a range facing the heat transfer surface of the heat transfer plate 7.
- the inner fin 6 is formed by cutting and raising a plurality of first cut and raised portions 61 and second cut and raised portions 62 from the substrate portion 6a.
- the first cut-and-raised portion 61 has a U-shaped cross section, and connects the first top surface portion 61a parallel to the substrate portion 6a and both ends of the first top surface portion 61a to the substrate portion 6a. It is formed by two first leg portions 61b.
- a plurality of first cut-and-raised portions 61 are formed in the x-axis direction at a predetermined interval.
- the second cut-and-raised portion 62 has a U-shaped cross section, and connects the substrate portion 6a with the second top surface portion 62a parallel to the substrate portion 6a and both ends of the second top surface portion 62a. Two second legs 62b are formed. And the 2nd cut-and-raised part 62 is also formed in multiple numbers by the x-axis direction via the predetermined space
- the second cut-and-raised part 62 is offset in the x-axis direction with respect to the first cut-and-raised part 61 so that a part of the second top surface part 62a is connected to a part of the first top surface part 61a.
- the first top surface portion 61a and the second top surface portion 62a are collectively referred to as the top surface portion 6b).
- the first cut-and-raised portions 61 formed in the x-axis direction at a predetermined interval and the second cut-and-raised portions 61 formed in the x-axis direction at a predetermined interval are A plurality of the surface portions 62a are arranged in the y-axis direction so as to be connected to a portion of the first top surface portion 61a.
- the inner fin 6 has a configuration in which a plurality of first leg portions 61b and second leg portions 62b are formed between the substrate portion 6a and the top surface portion 6b.
- the substrate portion 6a faces (joins) one of the heat transfer plate 7a and the heat transfer plate 7b, and the top surface portion 6b and the other of the heat transfer plate 7a or the heat transfer plate 7b. It arrange
- the plate type heat exchanger 200 configured as described above has the following problems.
- the heat transfer surface of the heat transfer plate 7, the substrate portion 6a of the inner fin 6, and the top surface portion 6b are connected to the high temperature side.
- the heat of the fluid is transferred to the low temperature side fluid.
- the first fluid that is a high-temperature refrigerant or the like exchanges heat with the second fluid that is a low-temperature water or the like
- the heat of the first fluid is the heat transfer surface of the heat transfer plate 7 or the substrate portion of the inner fin 6.
- the second fluid is transmitted through 6a and the top surface portion 6b.
- the vapor-like first fluid condenses in the first flow path 11 in the process of giving heat to the second fluid.
- the heat transfer surface of the heat transfer plate 7, the substrate portion 6a and the top surface portion 6b of the inner fin 6 are formed flat, and thus the liquid of the first fluid that has become the condensate. A film is easily formed. For this reason, this liquid film becomes resistance, and the heat transfer rate from the first fluid to the second fluid decreases.
- the plate heat exchanger 100 according to the first embodiment as shown in FIGS. 5 to 8 described later, in addition to the configuration of the conventional plate heat exchanger 200, The groove 9 of the heat transfer plate 7 is provided.
- FIG. 5 is an enlarged view of a main part of the plate heat exchanger according to the first embodiment of the present invention, and is an enlarged view of a position corresponding to the V part of FIG.
- FIG. 6 is a perspective view showing a heat transfer plate and inner fins of the plate heat exchanger according to the first embodiment.
- FIG. 7 is an enlarged view of a portion W in FIG.
- FIG. 8 is a perspective view showing a heat transfer plate of the plate heat exchanger according to the first embodiment. Note that “A” shown in FIG. 5 indicates the flow direction of the first fluid, and “B” shown in FIGS. 1 and 4 indicates the flow direction of the second fluid.
- the plate heat exchanger 100 includes a plurality of concave grooves 8 having a U-shaped cross section in the inner fin 6 provided in the first flow path 11. Is formed. These concave grooves 8 are formed along the y-axis, that is, along the flow direction of the first fluid. The concave grooves 8 are formed on the surface on the first flow path side of the substrate portion 6a and the surface on the first flow path side of the top surface portion 6b. That is, these concave grooves 8 are provided in a range (a range in contact) facing the heat transfer surface of the heat transfer plate 7 in the inner fin 6.
- each of the concave grooves 8 is formed without interruption from the upstream side to the downstream side in the flow direction of the first fluid flowing through the inner fin 6. Further, in the first embodiment, each of the concave grooves 8 is formed in a linear shape.
- FIG. 5 and FIG.8 the board
- FIG. A plurality of concave grooves 9 having a U-shaped cross section are formed in a range that does not face the portion 6a and the top surface portion 6b (a range that does not contact). These concave grooves 9 are formed along the y-axis, that is, along the flow direction of the first fluid.
- each of the concave grooves 9 is formed without interruption from the upstream side to the downstream side in the flow direction of the first fluid flowing through the inner fin 6. Further, in the first embodiment, each of the concave grooves 9 is formed in a linear shape.
- the concave groove 8 of the inner fin 6 and the concave groove 9 of the heat transfer plate 7 are formed in a range in contact with the first fluid.
- the first fluid for example, a process in which the first fluid, which is a vapor-like refrigerant or the like at a high temperature, gives heat to the second fluid.
- the condensed liquid film of the first fluid can be held in the concave grooves 8 and the concave grooves 9, and the condensed liquid film of the first fluid can be concentrated in the concave grooves 8 and the concave grooves 9. Therefore, the plate heat exchanger 100 according to the first embodiment condenses the first fluid on the heat transfer surface of the heat transfer plate 7, the substrate portion 6 a of the inner fin 6, and the top surface portion 6 b in the first flow path 11.
- the plate heat exchanger 100 according to the first embodiment is configured such that the first fluid formed on the heat transfer surface of the heat transfer plate 7, the substrate portion 6 a and the top surface portion 6 b of the inner fin 6 in the first flow path 11.
- the condensate film can be made thinner. Therefore, the plate heat exchanger 100 according to the first embodiment can improve the heat transfer rate from the first fluid to the second fluid.
- the concave groove 8 and the concave groove 9 are formed along the flow direction of the first fluid. Therefore, the condensate of the first fluid held in the concave groove 8 and the concave groove 9 is likely to flow downstream, and the liquid repellency of the condensate of the first fluid from the concave groove 8 and the concave groove 9 is improved. . Therefore, in the plate heat exchanger 100 according to the first embodiment, the condensate of the first fluid stays in the concave groove 8 and the concave groove 9 and the heat transfer rate from the first fluid to the second fluid decreases. It can also be suppressed.
- the concave groove 8 and the concave groove 9 are formed without interruption from the upstream side to the downstream side in the flow direction of the first fluid flowing inside the inner fin 6. Has been. For this reason, the spillability of the condensate of the 1st fluid from the ditch
- the concave groove 8 and the concave groove 9 are formed in a straight line, the first fluid is condensed from the concave groove 8 and the concave groove 9.
- the liquid spillability is further improved, and the heat transfer rate from the first fluid to the second fluid can be further improved.
- the groove 9 is smaller than the thickness of the heat transfer plate 7. For this reason, the groove 9 can be formed in the heat transfer plate 7 without causing the heat transfer surface of the heat transfer plate 7 to protrude toward the second flow path 12. Therefore, the joining of the heat transfer plate 7 and the inner fin 6 is not complicated, and the plate heat exchanger 100 can be easily manufactured.
- the example in which the second fluid is heated while the high temperature first fluid is condensed has been described.
- the plate heat exchanger 100 when the low temperature first fluid evaporates and the high temperature second fluid is cooled, and the first fluid is a single phase (liquid phase or gas phase).
- the first fluid is held in the groove 8 and the groove 9 when the first fluid evaporates, nucleate boiling can be promoted, thereby improving the heat transfer coefficient between the first fluid and the second fluid. It is.
- the corner portions of the concave groove 8 (the flat portions of the substrate portion 6a and the top surface portion 6b of the inner fin 6).
- the agitation effect of the first fluid is improved by the boundary between the portion and the groove 8 and the corner of the groove 9 (the boundary between the flat portion of the heat transfer surface of the heat transfer plate 7 and the groove 9). Because.
- the said stirring effect is an effect acquired even when the 1st fluid condenses and evaporates.
- FIG. The concave groove 8 and the concave groove 9 shown in the first embodiment are formed in a substantially U-shape in which the distance from the opening to the bottom is constant in a cross section perpendicular to the longitudinal direction of these concave grooves.
- groove 9 may be formed in the following cross-sectional shapes, for example. Note that a configuration not particularly described in the second embodiment is the same as that of the first embodiment, and the same function and configuration are described using the same reference numerals.
- FIG. 9 is an enlarged view of a main part showing an example of a plate heat exchanger according to Embodiment 2 of the present invention.
- FIG. 9 is a cross-sectional view taken along a cross section perpendicular to the longitudinal direction of the groove 8 and the groove 9.
- the concave groove 8 and the concave groove 9 of the plate heat exchanger 100 according to Embodiment 2 have a width that decreases from the opening to the bottom. Is formed. For example, as shown in FIG.
- the concave groove 8 and the concave groove 9A by forming the concave groove 8 and the concave groove 9 in a triangular cross section, the concave groove 8 and the concave groove 9 whose width decreases from the opening to the bottom can be formed. it can. Further, for example, as shown in FIG. 9B, by forming the concave groove 8 and the side surface of the concave groove 9 in a stepped shape, in other words, a concave groove having a width smaller than that of the concave groove at the bottom of the concave groove. By forming the groove 8 and the groove 9, it is possible to form the groove 8 and the groove 9 whose width decreases from the opening to the bottom.
- a through-groove 8a having a square cross section formed in the substrate portion 6a and the top surface portion 6b of the inner fin 6 and a portion facing the through-groove 8a of the heat transfer plate 7 are formed.
- the concave groove 8 is formed by the bottom side concave groove 8b having a width smaller than that of the groove 8a.
- a groove having a width smaller than that of the groove may be formed in the bottom of the groove on the substrate portion 6a and the top surface portion 6b of the inner fin 6, and the groove 8 may of course be used. That is, as a matter of course, the concave groove 8 may be formed by processing only the substrate portion 6 a and the top surface portion 6 b of the inner fin 6.
- the concave groove 8 shown in FIG. 9A has a triangular cross section formed in a trapezoidal through groove 8a formed in the inner fin 6 and a portion of the heat transfer plate 7 facing the through groove 8a.
- the concave groove 8 shown in the first embodiment is also formed in the through-groove 8a having a square cross section formed in the inner fin 6 and the portion facing the through-groove 8a of the heat transfer plate 7, and the through-groove 8a
- the bottom groove 8b having the same width.
- the plate heat exchanger 100 configured as in the second embodiment can obtain the following effects as compared with the first embodiment in addition to obtaining the same effects as the first embodiment. You can also
- the concave groove 8 and the concave groove 9 are held.
- the amount of condensate to be adjusted can be adjusted.
- the plate heat exchanger 100 according to the second embodiment has the condensate liquid in the initial stage where the condensate film of the first fluid is formed.
- the holding amount can be smaller than that in the first embodiment.
- the amount of the condensate retained in the concave groove 8 and the concave groove 9 gradually increases, but this increased amount can be made larger than in the first embodiment.
- the concave groove 8 with the through groove 8a of the inner fin 6 and the bottom side concave groove 8b of the heat transfer plate 7, the through groove 8a and the bottom side concave groove 8b are formed. Since it becomes a mark at the time of aligning the inner fin 6 and the heat transfer plate 7, the assembly accuracy of the plate heat exchanger 100 can be improved, and the reliability of the plate heat exchanger 100 is improved.
- the concave groove 8 and the concave groove 9 are formed in a cross-sectional triangle shape as shown in FIG. 9A, the amount of liquid film retained during condensation can be adjusted by the apex angle and the side length of the triangle. Further, when the concave groove 8 and the concave groove 9 are formed in a triangular cross section as shown in FIG. 9B, the amount of liquid film retained during condensation can be adjusted by changing the dimensions a and b.
- Embodiment 3 The shape of the concave groove 8 and the concave groove 9 is not limited to the shape shown in the first and second embodiments, and may be formed in the following cross-sectional shape, for example. Note that a structure not particularly described in the third embodiment is the same as that in the first or second embodiment, and the same function or structure is described using the same reference numeral.
- FIG. 10 is a main part enlarged view showing an example of a plate heat exchanger according to Embodiment 3 of the present invention.
- FIG. 10 is a cross-sectional view taken along a cross section perpendicular to the longitudinal direction of the groove 8 and the groove 9.
- the concave groove 8 and the concave groove 9 of the plate heat exchanger 100 according to Embodiment 3 have a width that increases from the opening to the bottom. Is formed. For example, as shown in FIG.
- the concave groove 8 and the concave groove 9 are formed in a trapezoidal shape having an opening on the short side, whereby the concave groove 8 having a width that increases from the opening to the bottom.
- a concave groove 9 can be formed.
- FIG. 10B by forming the side surfaces of the concave groove 8 and the concave groove 9 in a step shape, in other words, the concave groove having a width wider than the concave groove at the bottom of the concave groove.
- a through-groove 8a having a rectangular cross section formed in the substrate portion 6a and the top surface portion 6b of the inner fin 6 and a portion facing the through-groove 8a of the heat transfer plate 7 are formed.
- the concave groove 8 is formed by the bottom side concave groove 8b having a width larger than that of the groove 8a.
- the plate heat exchanger 100 configured as in the third embodiment can obtain the following effects as compared with the first embodiment, in addition to obtaining the same effects as the first embodiment. You can also
- the plate heat exchanger 100 according to the third embodiment since the concave groove 8 and the concave groove 9 are formed so as to increase in width from the opening to the bottom, the groove is held in the concave groove 8 and the concave groove 9.
- the amount of condensate to be adjusted can be adjusted.
- the plate heat exchanger 100 according to the third embodiment has the condensate liquid in the initial stage where the condensate film of the first fluid is formed.
- the holding amount can be made larger than that in the first embodiment.
- the amount of the condensate retained in the concave groove 8 and the concave groove 9 gradually increases, but this increased amount can be made smaller than in the first embodiment.
- the shape of the concave groove 8 and the concave groove 9 according to the third embodiment is a shape in which the condensate is easily drawn. For this reason, in the concave groove 8 and the concave groove 9, boiling is easily activated by adjacent bubbles, and therefore, when the plate heat exchanger 100 according to the third embodiment is used under the condition that the first fluid evaporates.
- the heat transfer coefficient between the first fluid and the second fluid can be improved as compared with the first and second embodiments.
- Embodiment 4 The end of the concave groove 9 shown in the first to third embodiments may be provided with the following outlet side concave groove 9a and inlet side concave groove 9b. Note that a structure not particularly described in the fourth embodiment is the same as that of any of the first to third embodiments, and the same function or configuration is described using the same reference numeral.
- FIG. 11 is a perspective view showing a heat transfer plate of a plate heat exchanger according to Embodiment 4 of the present invention.
- the heat transfer plate 7 of the plate heat exchanger 100 according to the fourth embodiment has one outlet connected to the concave groove 9 and the other outlet connected to the outlet 2 of the first fluid. Is formed.
- the heat transfer plate 7 of the plate heat exchanger 100 according to the fourth embodiment has one end connected to the groove 9 and the other end connected to the inlet 1 of the first fluid.
- a groove 9b is also formed.
- the first fluid that has flowed through the inner fin 6 is inclined to flow into the first fluid outlet 2.
- the first fluid that has flowed into the first flow path 11 from the first fluid inlet 1 flows into the inner fin 6 after flowing into the inner fin 6 side. Therefore, the flow path from the first fluid inlet 1 to the inner fin 6 and the flow path from the inner fin 6 to the first fluid outlet 2 are in contrast to the inner fin 6 flow path.
- the flow path is difficult to flow.
- the plate heat exchanger 100 according to the fourth embodiment includes the inlet-side concave groove 9b and the outlet-side concave groove 9a, it is difficult to flow with respect to the inner fin 6 flow path.
- the first fluid can be smoothly flowed by flowing the first fluid along the inlet-side groove 9b and the outlet-side groove 9a. Further, since the first fluid can flow smoothly in the flow path that is difficult to flow with respect to the flow path in the inner fin 6, the effective heat transfer area of the heat transfer plate 7 can also be increased. These effects can be obtained by providing the first fluid only by providing one of the inlet side concave groove 9b and the outlet side concave groove 9a.
- the present invention has been described by taking the plate heat exchanger 100 in which the inner fin 6 is provided in the second flow path 12 as an example.
- the present invention can be applied to a plate heat exchanger in which the fins 6 are not provided and the inner fins 6 are provided only in the first flow path 11.
- the plate-type heat in which the concave groove 8, the concave groove 9, the outlet side concave groove 9a and the inlet side concave groove 9b are formed only on the first flow path 11 side.
- the concave groove 8, the concave groove 9, the outlet side concave groove 9a, and the inlet side concave groove 9b may be formed on the second flow path 12 side.
- the effect obtained on the first flow path 11 side can also be obtained on the second flow path 12 side.
- the plate heat exchanger 100 in which both the concave groove 8 and the concave groove 9 are formed has been described. However, only one of the concave groove 8 and the concave groove 9 is described. Even if formed, the above-mentioned effect can be obtained.
- the plate heat exchanger 100 in which the first flow path and the second flow path are opposed to each other has been described.
- the first flow path and the second flow path have been described.
- the road may be a parallel flow.
- the plate heat exchanger according to the present invention may be configured by combining the concave grooves 8 and the concave grooves 9 having the shapes shown in the first to third embodiments.
- Embodiment 5 FIG. Finally, an example of the refrigeration cycle apparatus including the plate heat exchanger 100 shown in the first to fourth embodiments will be described.
- FIG. 12 is a circuit diagram showing a refrigeration cycle apparatus according to Embodiment 5 of the present invention.
- a refrigeration cycle apparatus 150 shown in FIG. 12 is an air conditioner using any of the plate heat exchangers 100 described in the first to fourth embodiments as a refrigerant-to-refrigerant heat exchanger.
- the refrigeration cycle apparatus 150 includes a heat source side refrigerant circuit 30, a use side refrigerant circuit 40, and the like.
- the heat source side refrigerant circuit 30 includes a compressor 31, a plate heat exchanger 100 serving as a condenser, an expansion valve 33, and an evaporator 32, which are sequentially connected by refrigerant piping.
- the usage-side refrigerant circuit 40 is configured by sequentially connecting a pump 41, a usage-side heat exchanger 42, and a plate heat exchanger 100 through refrigerant piping.
- the heat source side refrigerant that has flowed into the plate heat exchanger 100 condenses by heating the use side refrigerant (for example, the second fluid).
- the heat source side refrigerant condensed in the plate heat exchanger 100 becomes a supercooled liquid refrigerant and flows into the expansion valve 33.
- the low-temperature and low-pressure heat-source-side refrigerant expanded by the expansion valve 33 enters a two-phase state with a low dryness and flows into the evaporator 32.
- the heat-source-side refrigerant that has flowed into the evaporator 32 absorbs heat from the air sent from the blower 32a and evaporates.
- the heat source side refrigerant evaporated in the evaporator 32 is sucked into the compressor 31 and compressed again.
- the use side refrigerant heated by the heat exchange with the heat source side refrigerant in the plate heat exchanger 100 is sucked by the pump 41 and then discharged and flows into the use side heat exchanger 42.
- the use-side refrigerant heats the air in the air-conditioned space sent out from the blower 42a and heats the air-conditioned space. Thereafter, the use-side refrigerant flows into the plate heat exchanger 100 again.
- the refrigeration cycle apparatus 150 configured as described above includes the plate heat exchanger 100 shown in the first to fourth embodiments, the refrigeration cycle apparatus 150 has high energy saving and high reliability.
- the plate heat exchanger 100 is used as the condenser of the heat source side refrigerant circuit 30, but the plate heat exchanger 100 is used as the evaporator of the heat source side refrigerant circuit 30. It may be used. Of course, the plate heat exchanger 100 may be used for both the condenser and the evaporator of the heat source side refrigerant circuit 30.
- the plate-type heat exchanger according to the present invention can be used for many industrial and household devices equipped with a plate-type heat exchanger, such as power generation and food sterilization treatment equipment, in addition to the above-described air conditioner. .
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Abstract
Description
特許文献1に記載のプレート式熱交換器は、伝熱プレートの伝熱面及びインナーフィンの伝熱面と対向する(接する)範囲がフラット(平坦)になっている。このため、第1流体が流れる流路には、伝熱プレートの伝熱面及びインナーフィンの伝熱面と対向する(接する)範囲に凝縮液の液膜が形成されやすい。このため、この液膜が熱抵抗となり、第1流体から第2流体への熱伝達率が低下してしまうという問題点があった。
本実施の形態1に係るプレート式熱交換器100は、流路にインナーフィン6を設けたものである。そして、本実施の形態1に係るプレート式熱交換器100は、インナーフィン6に凹溝8を形成し、伝熱プレート7に凹溝9を形成したことを特徴の1つとしている。
以下では、本実施の形態1に係るプレート式熱交換器100の理解を容易とするため、まず、従来の一般的なプレート式熱交換器200(つまり、本実施の形態1に係る凹溝8,9が形成されていないプレート式熱交換器)を説明する。その後、従来のプレート式熱交換器200と比較しながら、本実施の形態1に係るプレート式熱交換器100について説明する。
なお、本実施の形態1に係るプレート式熱交換器100及び従来のプレート式熱交換器200を説明するに際し、同一の機能を果たす構成には同一の符号を付して説明することとする。
まず、図1~図4を用いて、従来のプレート式熱交換器200について説明する。
なお、以下では、便宜上、サイドプレート5の端手方向をx軸とし、サイドプレート5の長手方向をy方向として説明する。
実施の形態1で示した凹溝8及び凹溝9は、これら凹溝の長手方向と垂直な断面において、開口部から底部までの距離が一定の略コの字形状に形成されていた。これに限らず、凹溝8及び凹溝9を、例えば次のような断面形状に形成してもよい。なお、本実施の形態2で特に記述しない構成については実施の形態1と同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
凹溝8及び凹溝9の長手方向と垂直な断面において、本実施の形態2に係るプレート式熱交換器100の凹溝8及び凹溝9は、開口部から底部にかけて幅が小さくなるように形成されている。例えば、図9(a)に示すように、凹溝8及び凹溝9を断面三角形状に形成することにより、開口部から底部にかけて幅が小さくなる凹溝8及び凹溝9を形成することができる。また例えば、図9(b)に示すように、凹溝8及び凹溝9の側面部を階段形状に形成することにより、換言すると、凹溝の底部に該凹溝よりも幅の小さい凹溝を形成して凹溝8及び凹溝9を構成することにより、開口部から底部にかけて幅が小さくなる凹溝8及び凹溝9を形成することができる。
凹溝8及び凹溝9の形状は、実施の形態1及び実施の形態2で示した形状に限定されるものではなく、例えば次のような断面形状に形成してもよい。なお、本実施の形態3で特に記述しない構成については実施の形態1又は実施の形態2と同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
凹溝8及び凹溝9の長手方向と垂直な断面において、本実施の形態3に係るプレート式熱交換器100の凹溝8及び凹溝9は、開口部から底部にかけて幅が大きくなるように形成されている。例えば、図10(a)に示すように、凹溝8及び凹溝9を、短辺側が開口部となった台形形状に形成することにより、開口部から底部にかけて幅が大きくなる凹溝8及び凹溝9を形成することができる。また例えば、図10(b)に示すように、凹溝8及び凹溝9の側面部を階段形状に形成することにより、換言すると、凹溝の底部に該凹溝よりも幅の大きい凹溝を形成して凹溝8及び凹溝9を構成することにより、開口部から底部にかけて幅が大きくなる凹溝8及び凹溝9を形成することができる。
実施の形態1~実施の形態3で示した凹溝9の端部に、次のような流出口側凹溝9a及び流入口側凹溝9bを設けてもよい。なお、本実施の形態4で特に記述しない構成については実施の形態1~実施の形態3のいずれかと同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
本実施の形態4に係るプレート式熱交換器100の伝熱プレート7には、一端が凹溝9と接続され、他端が第1流体の流出口2に接続された流出口側凹溝9aが形成されている。
また、本実施の形態4に係るプレート式熱交換器100の伝熱プレート7には、一端が凹溝9と接続され、他端が第1流体の流入口1に接続された流入口側凹溝9bも形成されている。
最後に、実施の形態1~実施の形態4で示したプレート式熱交換器100を備えた冷凍サイクル装置の一例について説明する。
この図12に示す冷凍サイクル装置150は、実施の形態1~実施の形態4に記載のいずれかのプレート式熱交換器100を冷媒対冷媒熱交換器として用いた空気調和装置である。冷凍サイクル装置150は熱源側冷媒回路30及び利用側冷媒回路40等から構成されている。
Claims (10)
- 2枚のサイドプレートの間に、フラットな伝熱面が形成された伝熱プレートを所定の間隔を介して複数積層し、
前記サイドプレートと前記伝熱プレートとの間及び各前記伝熱プレートの間に形成される空間に、第1流体が流通するための第1流体流入ポート及び第1流体流出ポートと、前記第1流体とは異なる第2流体が流通するための第2流体流入ポート及び第2流体流出ポートとが交互に連通し、
前記第1流体が流通する第1流路と前記第2流体が流通する第2流路が交互に形成され、
少なくとも前記第1流路には、前記伝熱面と対向する範囲にインナーフィンが設けられたプレート式熱交換器であって、
前記第1流路における前記インナーフィンの設置範囲には、
前記インナーフィンにおける前記伝熱プレートと対向する範囲、及び、前記伝熱プレートのうちの少なくとも一方に、前記インナーフィンのフィン部間の寸法よりも小さい複数の凹溝が、前記第1流体の流れ方向に沿って形成されていることを特徴とするプレート式熱交換器。 - 前記凹溝の長手方向と垂直な断面において、
前記凹溝は、開口部から底部にかけて幅が小さくなっていることを特徴とする請求項1に記載のプレート式熱交換器。 - 前記凹溝の長手方向と垂直な断面において、
前記凹溝は、開口部から底部にかけて幅が大きくなっていることを特徴とする請求項1又は請求項2に記載のプレート式熱交換器。 - 前記凹溝が形成された流路には、
一端が前記凹溝と接続され、他端が当該流路と連通する流入口に接続された流入口側凹溝、及び、一端が前記凹溝と接続され、他端が当該流路と連通する流出口に接続された流出口側凹溝のうちの少なくとも一方が形成されていることを特徴とする請求項1~請求項3のいずれか一項に記載のプレート式熱交換器。 - 前記第2流路にも、
前記伝熱面と対向する範囲に前記インナーフィンが設けられ、
前記凹溝が、前記第2流体の流れ方向に沿って形成されていることを特徴とする請求項1~請求項4のいずれか一項に記載のプレート式熱交換器。 - 前記インナーフィンの設置範囲において、
前記凹溝のそれぞれは、該インナーフィンの内部を流れる流体の流れ方向上流側から下流側にかけて途切れることなく形成されていることを特徴とする請求項1~請求項5のいずれか一項に記載のプレート式熱交換器。 - 前記凹溝のそれぞれは、直線状に形成されていることを特徴とする請求項1~請求項6のいずれか一項に記載のプレート式熱交換器。
- 前記凹溝の前記伝熱プレートに形成された部分の深さは、該伝熱プレートの厚みよりも小さくなっていることを特徴とする請求項1~請求項7のいずれか一項に記載のプレート式熱交換器。
- 前記凹溝のうちの少なくとも一部は、
前記インナーフィンに形成された貫通溝、及び、前記伝熱プレートの前記貫通溝と対向する部分に形成された底部凹溝によって形成されていることを特徴とする請求項1~請求項8のいずれか一項に記載のプレート式熱交換器。 - 請求項1~請求項9のいずれか一項に記載のプレート式熱交換器を備えたことを特徴とする冷凍サイクル装置。
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US14/435,237 US10168102B2 (en) | 2012-10-16 | 2012-10-16 | Plate type heat exchanger and refrigeration cycle apparatus having the same plate type heat exchanger |
PCT/JP2012/076726 WO2014061105A1 (ja) | 2012-10-16 | 2012-10-16 | プレート式熱交換器及びこのプレート式熱交換器を備えた冷凍サイクル装置 |
CN201280076435.3A CN104718423B (zh) | 2012-10-16 | 2012-10-16 | 板式热交换器以及具备该板式热交换器的冷冻循环装置 |
JP2014541853A JP6016935B2 (ja) | 2012-10-16 | 2012-10-16 | プレート式熱交換器及びこのプレート式熱交換器を備えた冷凍サイクル装置 |
EP12886566.4A EP2918958B1 (en) | 2012-10-16 | 2012-10-16 | Plate heat exchanger and refrigeration cycle device provided with plate heat exchanger |
CN201320782658.3U CN203615791U (zh) | 2012-10-16 | 2013-10-16 | 板式热交换器以及具有该板式热交换器的冷冻循环装置 |
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US20210341186A1 (en) * | 2018-11-16 | 2021-11-04 | Mitsubishi Electric Corporation | Plate-type heat exchanger, heat pump device, and heat-pump-type cooling and heating hot-water supply system |
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Also Published As
Publication number | Publication date |
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US20150260460A1 (en) | 2015-09-17 |
JP6016935B2 (ja) | 2016-10-26 |
EP2918958A4 (en) | 2016-08-10 |
EP2918958B1 (en) | 2018-12-05 |
CN203615791U (zh) | 2014-05-28 |
CN104718423B (zh) | 2017-03-01 |
US10168102B2 (en) | 2019-01-01 |
CN104718423A (zh) | 2015-06-17 |
EP2918958A1 (en) | 2015-09-16 |
JPWO2014061105A1 (ja) | 2016-09-05 |
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