CN203657306U

CN203657306U - Self-washing mechanism for ultralow-temperature refrigerator

Info

Publication number: CN203657306U
Application number: CN201320447390.8U
Authority: CN
Inventors: 蔡昊然; 胡效宗
Original assignee: Zhongke Meiling Cryogenics Co Ltd
Current assignee: Zhongke Meiling Cryogenics Co Ltd
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2014-06-18
Anticipated expiration: 2023-07-26

Abstract

The utility model relates to a self-washing mechanism for an ultralow-temperature refrigerator. The mechanism comprises a capillary tube, a filter and a condenser, wherein an inlet three-way joint is in series connection between the condenser and the filter through two ports of the inlet three-way joint; an outlet three-way joint is in series connection between the filter and the capillary tube through two ports of the outlet three-way joint; a bypass branch is in parallel connection with two ends of the filter which is in series connection between the capillary tube and the condenser; and a solenoid valve is in series connection with the bypass branch and electrically connected with a control panel. The self-washing mechanism is simple in structure, the system power consumption is not increased, and compared with existing refrigerating systems, the mechanism has the good compatibility and is easy to implement; the capillary tube can be washed regularly, so that the capillary tube is prevented from being blocked, the stable operation time of a refrigerating system is prolonged greatly, and the working reliability is improved.

Description

For ultra low temperature freezer from flushing machine

Technical field

The utility model relates to ultra low temperature freezer field, relate in particular to a kind of for ultra low temperature freezer from flushing machine.

Background technology

Ultralow temperature is preserved and is referred to that cryogenic temperature scope is-30 ℃ to-86 ℃ even lower warm areas, the infrastructure device of ultra-low temperature storage Xiang Shi hospital, Disease Control and Prevention Center, blood station, colleges and universities and scientific research institution's indispensability, is mainly used in preserving organ, tissue, skin, red blood cell, lymphocyte, DNA, embryo, marrow, seed, pollen, sample etc.

The ultra low temperature freezer of at present ,-80 ℃ of following storage temperatures adopts single stage compress or twin-stage overlapping technology substantially.In refrigerant system design; refrigeration piping design is generally longer; caliber is larger; throttle capillary tube caliber is thinner; lubricating oil very easily condenses in capillary import department under this storage temperature, adds the impurity and the moisture content that in pipeline, exist, and they mix can thoroughly block capillary; cause ultra low temperature freezer after work a period of time, disorderly closedown or refrigeration performance variation.

The method that the problem of stopping up for solution capillary in prior art is taked comprises: before pipeline is welded, first pipeline is carried out to cleaning, removal may remain in the impurity in pipeline; Freezing oil mass and optimization that the minimizing of trying one's best enters cryogenic piping arrange pipeline rout etc., once and occur capillary blockade, only have opening conduits to process, passive like this resolution policy had both affected client and had used, cause again maintenance cost significantly to increase, waste time and energy, be unfavorable for the maintenance and normal work of refrigeration system.

Utility model content

The purpose of this utility model is in order to overcome the deficiencies in the prior art, provide a kind of for ultra low temperature freezer from flushing machine, effectively prevent obstruction capillaceous.

The utility model technical solution problem adopts following technical scheme:

For ultra low temperature freezer from flushing machine, comprise capillary, filter, condenser, entrance three passes to two port series connection and is arranged between condenser and filter, outlet three passes to two port series connection and is arranged between filter and capillary, the two ends that are arranged at the filter between capillary and condenser in series connection are arranged in parallel a bypass branch road, in described bypass branch road, series connection arranges a magnetic valve, and described magnetic valve is electrically connected with control panel.

For the ease of assembling, magnetic valve, entrance threeway and outlet threeway are set to standard external member by connecting pipe, between each parts, adopt and are welded to connect.

Compared with prior art, the beneficial effects of the utility model are: the utility model is simple in structure, do not increase system power dissipation, have good compatibility with existing refrigeration system, easy to implement; Can carry out flushing operation to capillary regularly, prevent that it from stopping up, greatly extend the parallel-adder settle-out time of refrigeration system, improve functional reliability.

Accompanying drawing explanation

Fig. 1 is the normal refrigerating state schematic diagram of the utility model;

Fig. 2 is the utility model working state schematic representation.

In figure: 1 is magnetic valve; 2 is entrance threeway; 3 is outlet threeway; 4 is capillary; 5 is filter; 6 is condenser; 7 is control panel.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Refer to Fig. 1 and Fig. 2, Fig. 1 is the normal holding state schematic diagram of the utility model, and Fig. 2 is the utility model working state schematic representation.

For ultra low temperature freezer from flushing machine, comprise capillary 4, filter 5, condenser 6, entrance threeway 2 is arranged between condenser 6 and filter 5 with two port series connection, outlet threeway 3 is arranged between filter 5 and capillary 4 with two port series connection, the two ends that are arranged at the filter 5 between capillary 4 and condenser 6 in series connection are arranged in parallel a bypass branch road, in described bypass branch road, series connection arranges a magnetic valve 1, and described magnetic valve 1 is electrically connected with control panel 7.

In the time that ultra low temperature freezer is normally worked, magnetic valve 1 does not obtain the signal of telecommunication, and in off-position, now bypass branch road, for turn-offing, directly flows to capillary 4 from the cold-producing medium of condenser 6 filter 5 of flowing through, and system is in normal refrigerating operaton state.

Refrigeration system is in running, and when running into capillary 4 and stopping up, kind of refrigeration cycle is stagnated, and compressor protection is shut down, major cycle path blockade, and ultra-low temperature storage case case temperature is gone up gradually.Control panel 7 obtains after signal that capillary 4 stops up, power to magnetic valve 1, magnetic valve is opened conducting, now between entrance threeway 2 and outlet threeway 3, there is pressure differential, cold-producing medium is spontaneous to flow, the obstructive position of capillary 4 is carried out to the continuous flushing in 10 seconds, the moisture that capillary 4 joints may be existed, oil content or impurity rinse and clean out, original system is got through again, rear electromagnetic valve 1 power-off in 10 seconds, bypass branch road is closed, compressor starts again, kind of refrigeration cycle continues, the shutdown that refrigeration system occurs because of capillary 4 obstructions, chaser fault is removed.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

For ultra low temperature freezer from flushing machine, comprise capillary (4), filter (5), condenser (6), entrance threeway (2) is arranged between condenser (6) and filter (5) with two port series connection, outlet threeway (3) is arranged between filter (5) and capillary (4) with two port series connection, it is characterized in that: the two ends that are arranged at the filter (5) between capillary (4) and condenser (6) in series connection are arranged in parallel a bypass branch road, in described bypass branch road, series connection arranges a magnetic valve (1), described magnetic valve (1) is electrically connected with control panel (7).