CN2360810Y - Feeding and return-air device of refrigerating system - Google Patents

Abstract

The utility model relates to a liquid supply and air return device of a refrigerating system, which belongs to refrigerating equipment. The liquid supply and air return device of a refrigerating system is used for the refrigeration and liquid supply air return of ammonia and R22. The liquid supply and air return device of a refrigerating system is characterized in that the liquid supply and air return device of a refrigerating system is composed of a vertical or horizontal liquid storage barrel which is arranged on the same machine rack and is automatically provided with a relative accessories, an electric control box, an installation plate, a liquid use check valve arranged on the installation plate, an electromagnetical main valve, filters with high numbers, a liquid supply device, connecting pipe fittings, conducting wires, a liquid level controller which is arranged outside the vertical or horizontal liquid storage barrel by a balance pipe and a vertical pipe, etc. The liquid supply and air return device of a refrigerating system has the advantages that the liquid supply and air return device of a refrigerating system has simple structure and electromechanical integration; the liquid supply and air return device of a refrigerating system not only can be automatically controlled, but also can be manually operated; the liquid supply and air return device of a refrigerating system does not use a pump, and does not consume electricity; the liquid supply and air return device of a refrigerating system can reduce the matching area of an evaporator; the liquid supply and air return device of a refrigerating system has no fault, no abrasion, low factory building height, investment saving, etc.

Description

Refrigeration system feed flow back-steam device

A kind of refrigeration system feed flow back-steam device belongs to technical field of refrigeration equipment, is used for ammonia and R ₂₂Feed flow back-steam for the refrigeration system of cold-producing medium.

In the prior art, be that feed liquid way commonly used in the refrigeration system of cold-producing medium has three kinds of gravity force liquid-supply, ammonia pump feed flow and ammoniacal liquor circulating pump group feed flows with ammonia; And with R ₂₂For feed flow back-steam mode commonly used in the refrigeration system of cold-producing medium also has three kinds, i.e. heating power expansion valve feed flow, fluorine pump feed flow and fluorine barrel pump device (fluorine low pressure recycle liquid receiver and fluorine pump composite set) feed flow.It also can only be that disengagement area is utilized inadequate dry evaporator that gravity force liquid-supply is only applicable in short miniature cold storage of feed flow pipeline etc. and the storehouse; The ammonia pump feed flow must guarantee certain feed liquor liquid-column height, machine room height must be up to 7.5～8 meters for this reason, its bucket, pump, valve etc. all must on-the-spotly be installed, and not only long construction period, and installation quality is difficult to ensure, when especially temperature requirement in storehouse is very low, ammonia pump is not gone up liquid sometimes, and in addition, the open-type ammonia pump exists Vent to leak problem, and there is the lubricated normal problem that trouble occurs in the protected type ammonia pump, problems such as power consumption is big no matter which kind of ammonia pump all also has, serious wear; Though ammoniacal liquor circulating pump group is an electromechanical integrated device, but except that on-the-spot installation is more convenient, the existing defective of ammonia pump feed flow, it also all exists substantially, and in order to ensure normal operation, ammonia pump must be installed two simultaneously, and wherein one is standby, protected type ammonia pump price is expensive in addition, refrigeration cost height.The heating power expansion valve feed flow also is only applicable to middle-size and small-size freezer and aircondition, and also can only utilize inadequate dry evaporator with disengagement area, and in addition, the thermal expansion valve events is often malfunctioning, and fault rate is higher; Fluorine pump feed flow and fluorine barrel pump device feed flow are only applicable to big-and-middle-sized fluorine refrigeration system or the lower quick freezer of temperature, and its weak point and ammonia pump feed flow and ammoniacal liquor circulating pump group feed flow are basic identical, and there be limited evidence currently of has the people to adopt again.

The purpose of this utility model is to provide a kind of can keep R ₂₂Simple in structure and the barrel pump device electromechanical integration of the heating power expansion valve in the refrigeration system and can control advantages such as feed flow automatically, can fundamentally solve existing variety of issue in the prior art again, can really realize the feed flow back-steam fault-free in the two big class refrigeration systems and can control the refrigeration system feed flow back-steam device of running without not power consumption of pump automatically.

According to fluorine liquid R particularly wherein ₂₂The characteristic of liquid and two kinds of cold-producing mediums of ammoniacal liquor, at existing questions in the prior art, basic design of the present utility model is: the low pressure liquid receiver that will in the past suit measures to local conditions to disperse to be installed on the different refrigeration system diverse locations (contains its annex hereinafter to be referred as liquid receiver, for small-sized R ₂₂Refrigeration and the ammonia refrigeration that does not have a defrosting adopt vertical, for big-and-middle-sized ammonia refrigeration and have the then employing of defrosting horizontal), high order is counted filter, electromagnetic main valve, the liquid check-valves, fluid level controller, electric cabinet (can be shared same) and relative valve with whole system for small-sized, pipe fittings etc. are assembled in same frame and are contained on the installing plate on this frame and install fluid supplier additional, for big-and-middle-sized ammonia refrigeration (needing defrosting) equipment remove liquid receiver be horizontal also need above-mentioned fluid level controller, liquid respectively increases consumption more on demand with check-valves and fluid supplier.High pressure liquid refrigerant process valve, high order are counted filter like this, electromagnetic main valve enters fluid supplier, the low pressure liquid refrigerant that is come out by liquid receiver is counted filter, electromagnetic main valve, liquid through too high order and is entered fluid supplier with check-valves, the two is low in fluid supplier removes evaporimeter in the refrigeration system through liquid with check-valves after being mixed by the high-tenacity injection again, finishes the feed flow process; The back-steam flow process then is: the liquid vapour mix refrigerant that is come out by above-mentioned evaporimeter enters this bucket from the steam inlet pipe of liquid receiver, and liquid vapour separates the back low pressure liquid and removes fluid supplier by above-mentioned flow process, and low pressure gas removes compressor in the refrigeration system through the steam outlet pipe of this barrel.Thereby realization purpose of design.

Refrigeration system feed flow back-steam device described in the utility model is by having into, steam outlet pipe a and b and height, low pressure refrigerant liquid advances, going out to manage h and i and two ends is welded with the liquid receiver 1 of end socket and is loaded on the outer liquid of bucket check-valves 2, electromagnetic main valve 4, high order is counted filter 5, fluid level controller 6 and electric cabinet 7 constitute, it is characterized in that this installs its above-mentioned liquid check-valves 2, electromagnetic main valve 4, high order is counted filter 5 and is connected them and the pipe fitting of liquid receiver 1, control line and/or power line are all concentrated and are loaded on the installing plate 13 and this plate 13 and above-mentioned liquid receiver 1 are loaded on the same frame 8, simultaneously on this installing plate 13, fluid supplier 3 is housed also, above-mentioned fluid level controller 6 then is loaded on a barrel outer side by balance pipe e with the vertical tube 12 parallel with liquid receiver 1, and 7 of above-mentioned electric cabinets are contained near the frame 8 the ground and are shared with complete machine.

When this device is used for ammonia refrigeration and has defrosting to go back to the big-and-middle-sized system of liquid, its above-mentioned liquid receiver 1 has steam inlet pipe a on it, steam outlet pipe b, high pressure ammoniacal liquor feed tube h, the drain pipe i of low pressure ammoniacal liquor devaporation device, Pressure gauge 9, safety valve 10, defrosting liquid back pipe d, the horizontal bucket of high pressure ammonia vapour forcing pipe f and liquid level gauge 11, and on this staving also by balance pipe e with install another again additional perpendicular to the vertical tube 12 of liquid receiver 1 staving and be used for controlling the fluid level controller 6 of high liquid level (together with the controller of the normal operation of control liquid level two of interior meters), on above-mentioned installing plate 13, increase in addition the number of above-mentioned liquid according to actual needs with check-valves 2 and fluid supplier 3, and electric cabinet 7 must for special use and also be installed on the above-mentioned frame 8.

The utility model has the advantages that: with R ₂₂The gravity force liquid-supply that generally adopts at present a large amount of heating power expansion valve feed flows that use and the ammonia refrigeration system in the refrigeration system is compared, can make the supporting area of evaporimeter reduce 30%, and oil can not stayed in the evaporimeter, also can eliminate heating power expansion valve and often block motionless fault; Compare with ammonia pump feed flow with the most use in the present ammonia refrigeration system, machine room height can reduce greatly, thereby saves capital expenditure, shortening set-up time, assurance installation quality, makes equipment operation more reliable; Compare with existing barrel pump device, can further reduce height of devices, the cavitation of no pump drags without motor, economize on electricity, and movement-less part can be avoided fault and wearing and tearing, reduces maintenance load greatly; In addition since fluid supplier than protected type pump considerably cheaper, so equipment cost is low.

Accompanying drawing 1 is one of the utility model most preferred embodiment bulk shape structure front elevational schematic;

Accompanying drawing 2 is Fig. 1 schematic side view;

Accompanying drawing 3 is two bulk shape structure front elevational schematic of the utility model most preferred embodiment;

Accompanying drawing 4 is accompanying drawing 3 schematic side view.

In conjunction with the accompanying drawings and most preferred embodiment, further describe architectural feature of the present utility model as follows: most preferred embodiment one be used for refrigerating capacity 1.5 ten thousand to 20,000 kilocalories/time R ₂₂Cold-producing medium does not have the feed flow back-steam device that defrosting returns liquid, as shown in Figures 1 and 2, it is that external diameter of setting installation is that the high 800mm of 325mm wall thickness 8mm two ends are welded with the sphere end socket on the rectangle frame of being made by the shaped steel weldering 8, and band vapour-liquid is mixed into steam pipe a, steam outlet pipe b, high pressure R on it ₂₂Liquid feed tube h and low pressure R ₂₂Its plate face of the low pressure liquid receiver 1 of the steel of the drain pipe i of liquid devaporation device and steel plate matter is perpendicular to the installing plate 13 of frame 8, the liquid check-valves 2 of ZZRN-20 type is housed on plate 13, small-sized adjustable powerful liquid supply injector 3, two ZCL-32YB type electromagnetic main valves 4, the high order of two ZYG-32 types is counted filter 5 and is connected these parts and reaches pipe fitting between they and the liquid receiver 1 each other, control line and/or power line, adorning a UQK-40 type fluid level controller 6 by one with bucket 1 parallel vertical tube 12 in liquid receiver 1 outside one side is controlled at liquid level apart from a bucket end 300mm place, promptly arrive or when being lower than 300mm 4 of fluid electromagnetic main valves on the liquid receiver drain pipe close, then open when being higher than 300mm, near the ground frame, also be equipped with one with the shared electric cabinet 7 of complete machine.

Two of most preferred embodiment is to be used for ammonia refrigeration to have defrosting to return the feed flow back-steam device of the large-scale refrigerating system of liquid, as accompanying drawing 3 and shown in Figure 4.It is its top to be housed have drain pipe i, defrosting liquid back pipe d, high pressure ammonia vapour forcing pipe f and the liquid level gauge 11 that vapour-liquid that internal diameter is 200mm is mixed into steam pipe a and steam outlet pipe b, high pressure ammoniacal liquor feed tube h, low pressure ammoniacal liquor devaporation device on shaped steel matter rectangle frame 8, internal diameter 1400mm, long 3500mm, two ends are welded with the horizontal low pressure liquid receiver 1 of end socket, and also by balance pipe e with perpendicular to the vertical tube 12 of liquid receiver 1 staving two UQK-40 type fluid level controllers 6 are housed on this staving, one of them is used to control normal operation liquid level (being stabilized in apart from a bucket end 465mm); Another is used for the highest liquid level of control (apart from bucket top 410mm).2.45m between above-mentioned two liquid levels ³Volume can hold defrosting and return liquid.With the vertical tube 12 parallel liquid level gauges 11 that are equipped with.Charged magnetic main valve switch display lamp also is housed on frame 8, normally moves the special-purpose electric cabinet 7 and the steel plate matter rectangle installing plate 13 of liquid level display lamp, the highest liquid level display lamp, alarm and manual operation button, three ZCL-32YB type electromagnetic main valves 4, three high orders of ZYG-32 type are housed on the plate count filter 5, three (wherein two are the ZZRN-80Y type, and another is used for the medium-sized fluid supplier of ZZRN-32 type) liquid with check-valves 2, two adjustable powerful liquid supply injectors 3 and connect pipe fitting, control line and/or the power line of above-mentioned each parts.This device both can be realized control automatically according to the follow procedure block diagram under electric cabinet 7 controls, also can be manual.

Change as present embodiment: 1, this feed flow back-steam device can be made and can control automatically and can be manual, also can control automatically or can only manually control; 2, the type kind of fluid supplier can suitably change, and used number also can be according to practical needs increase and decrease; 3, electric controller 7 both can adopt general general electric cabinet, also can adopt computer control; 4, the specifications and models of each parts of adorning on the tube connector on the liquid receiver and the valve on the pipeline, filter and the installing plate, quantity etc. all can suitably change according to practical needs; 5, also can install oil scavenger and automatic by pass valve etc. additional.

Claims (2)

1, a kind of refrigeration system feed flow back-steam device, by having into, steam outlet pipe [a] and [b] and high, low pressure refrigerant liquid advances, going out pipe [h] and [i] and two ends is welded with the liquid receiver [1] of end socket and is loaded on the outer liquid of bucket check-valves [2], electromagnetic main valve [4], high order is counted filter [5], fluid level controller [6] and electric cabinet [7] constitute, it is characterized in that this installs its above-mentioned liquid check-valves [2], electromagnetic main valve [4], high order is counted filter [5] and is connected them and the pipe fitting of liquid receiver [1], control line and/or power line are all concentrated and are loaded on that installing plate [13] is gone up and this plate [13] and above-mentioned liquid receiver [1] are loaded on the same frame [8], fluid supplier [3] also is housed on this installing plate [13] simultaneously, above-mentioned fluid level controller [6] then is loaded on a barrel outer side by balance pipe e with the vertical tube [12] parallel with liquid receiver [1], and above-mentioned electric cabinet [7] then is contained near the frame [8] the ground and is shared with complete machine.

2, refrigeration system feed flow back-steam device according to claim 1, it is characterized in that when this device is used for ammonia refrigeration and has defrosting to go back to the big-and-middle-sized system of liquid, its above-mentioned liquid receiver [1] has steam inlet pipe [a] on it, steam outlet pipe [b], high pressure ammoniacal liquor feed tube [h], the drain pipe [i] of low pressure ammoniacal liquor devaporation device, Pressure gauge [9], safety valve [10], defrosting liquid back pipe [d], the horizontal bucket of high pressure ammonia vapour forcing pipe [f] and liquid level gauge [11], and on this staving also by balance pipe [e] with install another again additional perpendicular to the vertical tube [12] of liquid receiver [1] staving and be used for controlling the fluid level controller [6] of high liquid level, on above-mentioned installing plate [13], increase in addition the number of above-mentioned liquid according to actual needs with check-valves [2] and fluid supplier [3], and electric cabinet [7] must for special use and also be installed on the above-mentioned frame [8].