EP0160542A2 - Kühlmittelverteiler und Verfahren zur Einrichtung eines solchen Verteilers - Google Patents

Kühlmittelverteiler und Verfahren zur Einrichtung eines solchen Verteilers Download PDF

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Publication number
EP0160542A2
EP0160542A2 EP85302972A EP85302972A EP0160542A2 EP 0160542 A2 EP0160542 A2 EP 0160542A2 EP 85302972 A EP85302972 A EP 85302972A EP 85302972 A EP85302972 A EP 85302972A EP 0160542 A2 EP0160542 A2 EP 0160542A2
Authority
EP
European Patent Office
Prior art keywords
chamber
refrigerant
nozzle plate
distributor
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85302972A
Other languages
English (en)
French (fr)
Other versions
EP0160542A3 (en
EP0160542B1 (de
Inventor
John David Gillan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUTER ENVIRONMENTAL Ltd
Original Assignee
SUTER ENVIRONMENTAL Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SUTER ENVIRONMENTAL Ltd filed Critical SUTER ENVIRONMENTAL Ltd
Publication of EP0160542A2 publication Critical patent/EP0160542A2/de
Publication of EP0160542A3 publication Critical patent/EP0160542A3/en
Application granted granted Critical
Publication of EP0160542B1 publication Critical patent/EP0160542B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F25B41/45—Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow control on the upstream side of the diverging point, e.g. with spiral structure for generating turbulence

Definitions

  • This invention relates to a distributor used to feed refrigerant to the component circuits of a multi- circuit evaporator in a direct expansion refrigeration system, and to a method of setting-up such a distributor.
  • the universal method used to distribute the refrigerant in a direct expansion evaporator coil to each individual circuit is through small diameter feeder pipes connected together in an accurately machined cone-shaped header so that each pipe is aligned with its neighbour in both position and angle.
  • the cone-shaped header is located downstream of the expansion valve (or other refrigerant metering device) and thus has to divide a mixed liquid/vapour to the separate feeder pipes.
  • the size of the feeder pipes does, by creating a' pressure drop, help considerably with the distribution of the refrigerant, due to the application range, type of refrigerant and site conditions which can occur, they can only partly cope.
  • devices of United States manufacture have been used to distribute the liquid refrigerant between circuits by employing a nozzle plate removably fitted into a cavity just upstream of a cone-shaped deflector to create a mixing point for the refrigerant just prior to its distribution through the separate distribution feeder pipes.
  • nozzle plates are removably mounted in the distributor, they can be changed only with diffi- cultyy because a considerable amount of refrigeration pipework has to be disconnected and the nozzle plate "fished out" from the cavity which is always difficult and in a low temperature cold room rapidly becomes a most unpleasant task.
  • the present invention relates inter alia to an improved refrigerant distributor which reduces the severity of some of the problems detailed above.
  • a refrigerant distributor comprising a housing defining a refrigerant chamber, an inlet for refrigerant to the chamber and a plurality of outlets for refrigerant from the chamber with a nozzle plate disposed in the chamber is characterised in that the housing includes a nozzle plate removing passage opening into the chamber and seal means for closing said passage.
  • the chamber is large enough to accommodate two nozzle plates, a first in the flowpath of refrigerant from the inlet to the outlets and a second, linked to the first, adjacent to the location where the nozzle plate removing passage opens into the chamber.
  • the second nozzle plate can be provided with a pilot recess or hole of smaller bore than that in the first nozzle plate so that it can be drilled out as required following removal from the housing.
  • the linkage between, the first and second nozzle plates includes a measure of resilience.
  • the housing also includes a pressure measuring point which opens into the chamber upstream of the nozzle plate.
  • the first nozzle plate would be located just upstream of a cone-shaped deflector around which are arranged the refrigerant outlets.
  • the tried and proven nozzle type distribution system is used but with the advantage that the nozzle plate is more accessible and consequently it is quicker for an installer of a refrigerating system to change it.
  • Charts would-be provided with- each distributor so that predicted nozzle bores could be determined after running the refrigeration system at or close to its operating conditions with the "standard” or first nozzle plate in place in the housing.
  • the predicted nozzle size can be expected to be determined in one operation, thus making just one opening of the chamber for nozzle plate removal necessary.
  • Another aspect of the invention represents an improved method of setting-up a refrigeration plant using a distributor as defined above and this is featured in the following claim 8.
  • the distributor shown in Figure 1 has a housing 1 defining a chamber 2 that contains a pair of nozzle plates 3 and 4 linked by a linkage generally shown at 5.
  • a refrigerant inlet 6 and a plurality of outlets 7 are provided in the usual manner.
  • a conical deflector 8 is provided centrally below the bore 9 in the plate 3.
  • a pressure-sensing connection '10 is provided in the housing 1 as is a plug 11 closing a passage 12 large enough to permit removal of the linked plates 3, 4.
  • the plate 4 can have a pilot hole 13 in it so that following removal from the housing 1 it can be drilled out easily to the required bore size.
  • the pressure sensing connection 10 has been shown in the upper surface of the plug 11 since this is advantageous having regard to manufacturing cost and accessibility for connection to a pressure gauge. However the connection 10 could be located elsewhere, for example in the wall of the housing 1.
  • the pressure sensing connection 10 may be a simple flare connection or it could be a Schroeder valve to facilitate the connection of a pressure valve thereto.
  • the linkage 5 can be rods 5a, 5b as shown in Figure 2 which spring load the plates 3, 4 away from each other and aid in retaining the operating nozzle plate 3 in its correct position relative to the conical deflector 8.
  • FIG 3 shows a modified arrangement in which the same reference numerals have been used as were used in Figure 1 but with the addition of a prime.
  • the chamber 2' includes a nozzle plate 3' and the housing 1' includes a valve 13 attached to a spindle 14 which is threadedly engaged in the plug 11'.
  • the valve 13 includes a spigot 15 sliding in a recess 16 to keep the valve 13 central in the aperture 9' in the nozzle plate 3'.
  • a further possibility is the use of a spring-loaded nozzle with a guide, so that on reverse refrigerant flow conditions (e.g. a reverse cycle defrost) the liquid refrigerant will lift the nozzle and bypass this liquid around the nozzle hole rather than through it to reduce the pressure losses.
  • reverse refrigerant flow conditions e.g. a reverse cycle defrost
  • This arrangement could improve the effectiveness and efficiency of the reverse cycle defrost.
  • the nozzle Upon restoration of the normal refrigeration effect the nozzle would return to its seat under the action of the spring and guide.
  • the pressure drop occurring across the distributor needs to be measured during normal operation of the system. This can be assessed with sufficient accuracy by pumping the system down to atmospheric pressure and fitting a suitable pressure gauge to the connection 10. On restarting the system, the difference in pressure ( ⁇ P) between that indicated on the gauge and the suction pressure of the system is noted.
  • a ratio can be read off that corresponds to the measured ⁇ P.
  • This ratio indicates the change required in the diameter of the hole 9.
  • the measured ⁇ Pindicated a ratio of 1.25 and the hole has a diameter of 10 mm
  • the likely new hole diameter would be 12.5 mm and a reboring to at least 12 mm should be made before the ⁇ P is remeasured.
  • the hole 9 can easily be bored out further, but if the ratio is less than unity, a new nozzle plate with a smaller hole (e.g. plate 4) must be used for the reboring operation.
  • the pressure gauge can be connected to the connection 10' and the spindle 14 adjusted to bring the 4P down to the value shown by the respective normal point 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP85302972A 1984-04-27 1985-04-26 Kühlmittelverteiler und Verfahren zur Einrichtung eines solchen Verteilers Expired EP0160542B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848410844A GB8410844D0 (en) 1984-04-27 1984-04-27 Refrigerant distributors
GB8410844 1984-04-27

Publications (3)

Publication Number Publication Date
EP0160542A2 true EP0160542A2 (de) 1985-11-06
EP0160542A3 EP0160542A3 (en) 1986-09-03
EP0160542B1 EP0160542B1 (de) 1989-12-20

Family

ID=10560190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85302972A Expired EP0160542B1 (de) 1984-04-27 1985-04-26 Kühlmittelverteiler und Verfahren zur Einrichtung eines solchen Verteilers

Country Status (3)

Country Link
EP (1) EP0160542B1 (de)
DE (1) DE3574905D1 (de)
GB (1) GB8410844D0 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119063565B (zh) * 2024-11-07 2025-01-28 中国核动力研究设计院 一种基于ai的旋叶式流量自分配封头及其自动调控方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2044455A (en) * 1935-05-16 1936-06-16 Young Radiator Co Distributing head for evaporators
US2126364A (en) * 1937-07-14 1938-08-09 Young Radiator Co Evaporator distributor head
US2960845A (en) * 1958-01-31 1960-11-22 Sporlan Valve Co Refrigerant control for systems with variable head pressure
US3563055A (en) * 1969-03-17 1971-02-16 Sporlan Valve Co Refrrigerant distribvtor
US3741242A (en) * 1971-12-10 1973-06-26 Refrigerating Specialties Co Refrigerant feed control and system
US3864938A (en) * 1973-09-25 1975-02-11 Carrier Corp Refrigerant flow control device
ES512122A0 (es) * 1981-07-08 1983-02-16 Sueddeutsche Kuehler Behr "perfeccionamientos en los evaporadores".

Also Published As

Publication number Publication date
GB8410844D0 (en) 1984-06-06
EP0160542A3 (en) 1986-09-03
EP0160542B1 (de) 1989-12-20
DE3574905D1 (de) 1990-01-25

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