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Ways to Increase Valve Capacity of Refrigeration Units

A refrigeration unit and expansion valve technology, applied in the field of evaporator systems, can solve the problems of increased probability of failure, high cost, and complicated control respectively

Active Publication Date: 2016-08-03
SIEMENS SWITZERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

separate control is complex
Also as the control complexity increases, the probability of failure also increases
In addition, the use of multiple expansion valves is very expensive

Method used

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  • Ways to Increase Valve Capacity of Refrigeration Units
  • Ways to Increase Valve Capacity of Refrigeration Units
  • Ways to Increase Valve Capacity of Refrigeration Units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The same or similar components are marked with the same reference numerals in the figures. The illustration in the figure is schematic.

[0075] figure 1 A refrigeration unit 100 is shown having an evaporator 110 , a compressor 120 and a condenser 130 . A throttle device is arranged upstream of the evaporator 110 , consisting of a first line 101 and at least one second line 102 connected in parallel to the first line 101 .

[0076] figure 1 The continuous straight lines in represent the fluid lines of the refrigeration unit 100 . Dashed lines indicate control or data lines.

[0077] Both the first line and the second line 102 connected in parallel to the first line 101 are connected to the fluid inlet 106 of the evaporator 110 . The expansion valve 103 has a continuously adjustable first flow cross section and is arranged in the first line 101 in such a way that the continuously adjustable first flow cross section can be used to continuously set the first line 101 ...

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PUM

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Abstract

The present invention relates to a method of increasing the valve capacity of a refrigeration unit. A system for supplying fluid to an evaporator of a refrigeration unit has first and second lines connectable to a fluid inlet of the evaporator and an expansion valve having a continuously variable first flow cross-section. The valve is arranged in the first line so that the first flow cross-section can be used to continuously set a first mass flow of fluid through the first line. a shutoff device capable of discretely switching between open and closed positions is provided in the second line through which a second mass flow rate of fluid can be conveyed when it is in the open position and through the second line when it is in the closed position fluid flow is blocked. A throttle valve with a constant second flow cross-section is provided in the second line, through which a second mass flow can be delivered when the closing device is in the open position. The control unit is arranged such that a continuous change of the first flow cross-section of the expansion valve can be controlled and the closing device can be controlled as a function of the first flow cross-section.

Description

technical field [0001] The present invention relates to a system for supplying fluid to an evaporator of a refrigeration unit and a method for supplying fluid to an evaporator of a refrigeration unit. Background technique [0002] Larger expansion valves are correspondingly used in refrigeration systems with larger refrigeration capacity (or capacity). The expansion valve is used to expand the liquid refrigerant and direct it to the so-called evaporator. Large expansion valves allow large mass flows of refrigerant to be controlled in order to obtain output ranges in excess of 1 MW with refrigeration units. Such a large expansion valve is technically complex and expensive to produce. [0003] In order to be able to use smaller expansion valves without reducing the cooling capacity of the refrigeration system, multiple expansion valves are connected in parallel downstream of the evaporator. Expansion valves connected in parallel either work simultaneously or are individuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/06F25B41/04
CPCF25B2600/2513F25B2600/2519F25B41/385F25B41/34Y02B30/70F16K31/004
Inventor A.耶基莫夫K-H.佩特里G.特拉马格利诺
Owner SIEMENS SWITZERLAND