Connection system structure and operation method for evaporators in refrigeration equipment

A technology of refrigeration equipment and connection system, applied in the field of evaporator connection system structure in refrigeration equipment, can solve the problems of increasing condensation pressure and evaporating pressure, deviating from the optimal injection amount, and deviating from the design working condition of the system, and achieves temperature uniformity. Improve, shorten the start-up time, speed up the effect of temperature pulling

Active Publication Date: 2013-10-23
QINGDAO AUCMA ULTRA LOW TEMPERATURE FREEZING MACHINES
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for a single-stage refrigeration cycle, an evaporator is used to absorb the heat of the refrigeration space. When operating under the design conditions, its cooling capacity is limited, and it also makes the compressor do more work, thus failing to achieve energy saving and emission reduction. Purpose
[0004] For a system in which the four major components of a refrigeration equipment have been selected under the design working conditions, the fixed capillary length corresponds to an optimal charging volume, which can be increased by increasing the charging volume without changing the four major components themselves. flow rate, but this will deviate from the optimal charging amount, and when the refrigerant is injected to a certain extent, the evaporator will be filled with liquid refrigerant, and if the charging amount is increased, the heat transfer effect of the evaporator will not be significantly improved , the increase of injection volume will also lead to the increase of condensing pressure and evaporation pressure, which will affect the performance of the refrigeration system, make the system deviate from the original design conditions, and cannot achieve high-quality refrigeration quality

Method used

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  • Connection system structure and operation method for evaporators in refrigeration equipment
  • Connection system structure and operation method for evaporators in refrigeration equipment

Examples

Experimental program
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Embodiment 1

[0026] like figure 1 As shown, the structure of the evaporator connection system in this refrigeration equipment includes a compressor 1, a condenser 2, a dry filter 3, several throttling devices and several evaporators that form a cycle series connection.

[0027] The throttling device can use capillary tubes, expansion valves and other components that can achieve throttling, and capillary tubes are specifically used in this embodiment. In this embodiment, two evaporators are used in the same refrigeration space, which are named as the first evaporator 7 and the second evaporator 9, and the size and model of the two evaporators can be set according to different requirements; therefore, two capillary tubes are used correspondingly , which are named as the first capillary 5 and the second capillary 6 .

[0028] The outlet side of the dry filter 3 is connected with a liquid inlet solenoid valve 4 in sequence, one of the multiple branch valve ports of the liquid inlet solenoid v...

Embodiment 2

[0040] like figure 2As shown, the structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that:

[0041] An auxiliary capillary 10 is connected between the condenser 2 and the first evaporator 7 , and the liquid inlet terminal of the auxiliary capillary 10 is connected with a liquid inlet solenoid valve 4 . The first capillary 5 and the auxiliary capillary 10 are capillaries of two specific specifications. If the flow rate of the first capillary tube 5 does not meet the refrigerant liquid intake of the corresponding evaporator, switch to use the auxiliary capillary tube 10 to meet the required requirements, that is, connect the first capillary tube 5 or the auxiliary capillary tube 10 according to the actual feed value of the evaporator. , and the on-off operation of the auxiliary capillary 10 is also controlled by the liquid inlet solenoid valve 4 .

[0042] In the initial temperature pulling speed stage, the liquid inle...

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Abstract

The invention provides a connection system structure and an operation method for evaporators in refrigeration equipment to solve the problem of upper limit of refrigerating capacity in the existing refrigeration construction and operation method. The connection system structure for the evaporators in the refrigeration equipment comprises a compressor, a condenser, a plurality of flow controllers and a plurality of evaporators which are in circulating series connection, where a first flow controller is connected with a first evaporator, a second flow controller is connected with a second evaporator and the next flow controller is sequentially connected with the next evaporator between the condenser and the plurality of evaporators, liquid inlet start ends of the plurality of flow controllers are provided with liquid inlet electromagnetic valves, the plurality of evaporators are sequentially connected in series, a liquid outlet electromagnetic valve is arranged on a series connection pipeline on every two adjacent evaporators, and branch valve ports of the liquid outlet electromagnetic valves pass through branch pipelines and are joined and collected to be connected to the compressor. According to the invention, parallel connection is firstly adopted to increase the temperature raising speed, then series connection is adopted to increase the temperature raising speed, so that the refrigerating capacity is effectively increased, the power consumption of the compressor is reduced, and the purposes of energy conservation and emission reduction are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and relates to an assembly structure of multiple evaporators in refrigeration, in particular to a connection system structure and operation method of evaporators in refrigeration equipment. Background technique [0002] Refrigeration equipment is equipment used for refrigeration operations. Different refrigeration methods use different equipment. At present, vapor compression refrigeration is the most widely used. The main equipment includes compressors (see fluid conveying machinery), condensers, evaporators and throttle valves. Compressors are used to compress and transport refrigerant vapor, among which piston type and centrifugal type are the most widely used. [0003] At present, for a single-stage refrigeration cycle, an evaporator is used to absorb the heat of the refrigeration space. When operating under the design conditions, its cooling capacity is limited, and it also ...

Claims

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Application Information

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IPC IPC(8): F25B5/00F25B41/04F25B41/06F25B41/20F25B41/31
Inventor李志波李培荣赵冲吉喆毛海刚徐伟
OwnerQINGDAO AUCMA ULTRA LOW TEMPERATURE FREEZING MACHINES