CN106051216A - Three-way defrosting valve for cold storage rooms and cold storage room defrosting system - Google Patents
Three-way defrosting valve for cold storage rooms and cold storage room defrosting system Download PDFInfo
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- CN106051216A CN106051216A CN201610581246.1A CN201610581246A CN106051216A CN 106051216 A CN106051216 A CN 106051216A CN 201610581246 A CN201610581246 A CN 201610581246A CN 106051216 A CN106051216 A CN 106051216A
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- defrosting
- main valve
- trachea
- capillary tube
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- 238000010257 thawing Methods 0.000 title claims abstract description 68
- 230000008020 evaporation Effects 0.000 claims abstract description 46
- 238000001704 evaporation Methods 0.000 claims abstract description 46
- 238000005057 refrigeration Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 210000003437 trachea Anatomy 0.000 claims description 58
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 208000002925 dental caries Diseases 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229950000845 politef Drugs 0.000 claims description 3
- 230000002411 adverse Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 abstract 2
- 239000006200 vaporizer Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 210000001520 comb Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/42—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor
- F16K31/423—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor the actuated members consisting of multiple way valves
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- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a three-way defrosting valve for cold storage rooms and a cold storage room defrosting system. The defrosting valve comprises a main valve, a pilot valve and an electromagnetic coil, wherein the electromagnetic coil is arranged at the right side of the pilot valve, and the main valve is connected with the pilot valve through capillary tubes; the main valve comprises a main valve body, one group of air tubes on the main valve body, a main valve seat and a main valve block, and the two ends of the valve block are separately fixedly provided with a piston; and the right end of a slider in the pilot valve is connected with the pilot valve through a compressed spring. The defrosting system comprises evaporation bank tubes, the three-way defrosting valve, a gas-liquid separator, a compressor, a condenser, a liquid storing tank, an electromagnetic valve and an expansion valve which are sequentially connected through pipelines and form a closed-loop pipeline, and the three-way defrosting valve controls that a refrigerant flows towards the compressor from the evaporation bank tubes to carry out normal refrigeration or flows towards the evaporation bank tubes from the compressor to carry out heating defrosting. The three-way defrosting valve for the cold storage rooms and the cold storage room defrosting system are simple in structure, are convenient to operate, can be set into automatic fixed-time defrosting, save energy, are efficient, safe and reliable, are great in a defrosting function and are suitable for cold storage rooms with various sizes and various common refrigerants.
Description
Technical field
The present invention relates to a kind of freezer threeway defrosting valve and freezer defrosting system, belong to refrigeration plant, freezer defrost neck
Territory.
Background technology
When cold storage refrigerating system is properly functioning, the surface temperature of vaporizer is far below the dew point temperature of air, the water in air
Branch separates out and condenses on tube wall.If tube wall temperature is less than 0 °, water dew then condenses into frost.Frosting is also that refrigeration system is normally transported
The result of row, so evaporator surface allows a small amount of frosting.Owing to the thermal conductivity of frost is the least, it is one of percentage of metal,
Even more than one percent, thus frost layer is the formation of bigger thermal resistance.When particularly frost layer is thicker, just as insulation, make steaming
The cold sent out in device is not easy to come out, and have impact on the refrigeration of vaporizer, finally makes freezer not reach required temperature
Degree.Meanwhile, cold-producing medium evaporation situation in vaporizer also to weaken, and the cold-producing medium of incomplete evaporation is likely inhaled by compressor
Enter and cause liquid hammer accident.Therefore, it is necessary to manage to remove frost layer, otherwise frost layer can be increasingly thicker, and refrigeration is worse and worse.
In order to ensure that freezer heat exchange evaporation comb has good heat exchange property, it is necessary for it is carried out defrosting work.
Freezer Defrost method mainly has now: one, water spray defrosting: periodically use Water spray vaporizer, utilize the heat of water
Fall frost layer；Although the method defrosting effect is fine, but at temperature ratio in relatively low freezer, through defrosting repeatedly, water temperature is the lowest,
The effect of defrosting can be affected；And if set time in, frost is not rinsed, after heat exchange evaporation comb normally works, frost
Layer is likely to become ice sheet, makes next defrosting increasingly difficult.Two, electrically defrosting: utilize electrothermal tube of arranging on heat exchange evaporation comb to add evanescence of heat
Frost；Although the method is simple, but according to the practical structures of freezer and service condition at that time, the construction installing electrothermal tube is difficult
Spending the least, and later fault rate is the highest, maintenance management difficulty is relatively big, and economy is the poorest, and in storehouse being caused
Temperature raises, the poor quality of electric heating tube or use of long duration, easily burns out and even causes fire, there is serious peace
Full hidden danger.Three, machinery defrosting: manually defrost mainly by instrument, when the frost layer on freezer heat exchange evaporation comb needs to remove,
Owing to design freezer is without automatic defrosting device, can only manually defrost, but have a lot of inconvenience, and relatively costly, inefficiency.
It is therefore preferable that the mode of hot gas defrosting, the pressure high temperature hot gas discharged by compressor is sent into vaporizer, is temporarily treated as by vaporizer
Condenser, when utilizing condensation, the frost on vaporizer top layer is melted by liberated heat.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of freezer threeway to defrost valve
And freezer defrosting system, present configuration is simple, easy to operate, can arrange self-timing defrost, and efficient energy-saving is safe and reliable,
Defrosting better function, and it is applicable to large, medium and small freezer and various conventional cold-producing medium.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of freezer threeway defrosts valve, including main valve, pilot valve and solenoid；
Wherein, described main valve includes main valve body, main valve seat, main valve valve block, D trachea, E trachea and S trachea；Described main valve seat
Being arranged on the inwall on the downside of main valve body, be connected as a single entity with main valve body, main valve valve block is placed on main valve seat；Main valve valve block two ends
Respectively being fixed with a piston, main valve body inner chamber is divided into three cavitys, i.e. left piston chamber, main chamber, right plunger shaft by two pistons；
On main valve body, middle side part is provided with passage, connects with D trachea；Under main valve body, middle side part is provided with two passages, with E trachea and S
Trachea connects, and the two passage extends upward through whole main valve seat；Wherein D trachea connects with the gas outlet of compressor, S trachea
Connecting with the air intake of compressor, E trachea is connected with heat exchange evaporation comb；Main valve body is respectively arranged at the two ends with a passage, and left end is ventilated
Hole connection E capillary tube, right-hand member passage connection C capillary tube, it is achieved the function of control bound both sides cavity internal gas pressure difference；
When right plunger shaft internal gas pressure is more than left piston chamber, main valve valve block moves to left, and E trachea connects with S trachea；Work as left piston
Intracavity air pressure moves to right more than main valve valve block during right plunger shaft, and D trachea connects with E trachea.
Described pilot valve is internally provided with pilot valve slide block, and pilot valve slide block right-hand member passes through compression spring and pilot valve phase
Even；Pilot valve left end is provided with passage, connects with D capillary tube, and the other end of D capillary tube connects with D trachea；Bottom pilot valve
It is provided with some passages, is from left to right sequentially communicated E capillary tube, S capillary tube, C capillary tube, wherein the other end of S capillary tube and S
Trachea connects；
When pilot valve slide block moves to left, D capillary tube connects with C capillary tube, and E capillary tube connects with S capillary tube；Work as pilot valve
When slide block moves to right, D capillary tube connects with E capillary tube, and C capillary tube connects with S capillary tube.
Described solenoid is arranged on pilot valve right hand external, and during solenoid energising, pilot valve slide block is at solenoid
The tension force of compression spring is overcome to move to right under magneticaction；During solenoid power-off, pilot valve slide block is made at the tension force of compression spring
Move to left under with.
Preferably, described main valve body internal diameter is 100～110mm.
Preferably, described capillary inner diameter is 7.9～9.1mm, changes according to the internal diameter of main valve body and adjusts, it is possible to adapts to
The air-flow strengthened.
Preferably, the width of described main valve seat is 195～205mm, and material is politef, PTFE anti-wear degree
High.
A kind of freezer defrosting system, uses freezer threeway as above defrosting valve to realize, passes through pipeline including all
Be sequentially connected with and formed the heat exchange evaporation comb of closed loop pipeline, threeway defrosting valve, gas-liquid separator, compressor, condenser, fluid reservoir,
Electromagnetic valve and expansion valve；Wherein, threeway defrosting valve controls cold-producing medium and flows to compressor from heat exchange evaporation comb and normally freeze or from compression
Machine flows to heat exchange evaporation comb heating and defrosting；Flow in electromagnetic valve control access；In system, circuit is controlled by control electricity cabinet.
Because of freezer size, for the heat exchange evaporation comb more than one of refrigeration, branch connects in parallel, and every
Corresponding heat exchange evaporation comb, expansion valve and threeway defrosting valve, and each expansion valve check valve in parallel it is equipped with on branch road；It is anti-
Only temperature of ice house significantly raises, and heat exchange evaporation comb carries out defrost one by one, and when a heat exchange evaporation comb has adverse current, fluid is from this branch road
On check valve pass through, flow to remaining heat exchange evaporation comb bypass line.
Further, described compressor is piston compressor.
Further, described condenser is cocurrent flow type condenser.
Further, described control electricity cabinet arranges display screen.
Beneficial effect: a kind of freezer threeway defrosting valve of present invention offer and freezer defrosting system, relative to existing skill
The high temperature and high pressure gas that art has the advantage that 1, the present invention utilizes compressor to discharge, adds evanescence of heat to freezer heat exchange evaporation comb
Frost, defrosting effect is good, and efficient energy-saving is safe and reliable, No leakage, hidden peril of explosion；2, simple in construction, simplifies circuit design, subtracts
Lack the consumption of electromagnetic valve, cost-effective；3, easy to operate, self-timing defrost can be set, thus extend the freezer unit longevity
Life, promotes freezer refrigerating efficiency；4, to the defrost one by one of freezer comb, storehouse temperature does not raises, thus ensures that temperature of ice house is constant,
And it is applicable to large, medium and small freezer and various conventional cold-producing medium.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention a kind of freezer threeway defrosting valve；
Fig. 2 is the left view of the present invention a kind of freezer threeway defrosting valve；
Fig. 3 is the present invention a kind of freezer threeway defrosting valve operation principle when the most normal refrigeration of solenoid power-off
Figure；
Fig. 4 is the present invention a kind of freezer threeway defrosting valve operation principle when the i.e. heating defrosting of solenoid energising
Figure；
Fig. 5 is the fundamental diagram of a kind of freezer of present invention defrosting system；
Figure includes: 1, main valve, 2, pilot valve, 3, solenoid, 4, D trachea, 5, E trachea, 6, S trachea, 7, D capillary
Pipe, 8, E capillary tube, 9, S capillary tube, 10, C capillary tube, 11, pilot valve slide block, 12, compression spring, 13, main valve body, 14, main valve
Seat, 15, main valve valve block, 16, piston, 17, right plunger shaft, 18, heat exchange evaporation comb, 19, compressor, 20, left piston chamber, 21, gas-liquid
Separator, 22, condenser, 23, fluid reservoir, 24, threeway defrosting valve, 25, electromagnetic valve, 26, expansion valve, 27, check valve
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
Defrost valve for a kind of freezer threeway as shown in Figure 1, 2, including main valve 1, pilot valve 2 and solenoid 3；
As shown in Figure 3,4, described main valve 1 include main valve body 13, main valve seat 14, main valve valve block 15, D trachea 4, E trachea 5 and
S trachea 6；Described main valve seat 14 is arranged on the inwall on the downside of main valve body 13, is connected as a single entity with main valve body 13；Described main valve body 13
Internal diameter is 100～110mm, and the width of main valve seat 14 is 195～205mm, and material is politef；Main valve valve block 15 is placed in
On main valve seat 14, described main valve valve block 15 includes that inner shell and shell, inner shell and shell connect fixing by supporting pin；
Main valve valve block 15 two ends are respectively fixed with a piston 16, and main valve body 13 inner chamber is divided into three chambeies by two pistons 16
Body, i.e. left piston chamber 20, main chamber, right plunger shaft 17；On main valve body 13, middle side part is provided with passage, connects with D trachea 4；Main
13 times middle side parts of valve body are provided with two passages, connect with E trachea 5 and S trachea 6, and the two passage extends upward through whole
Main valve seat 14；Wherein D trachea 4 connects with the gas outlet of compressor 19, and S trachea 6 connects with the air intake of compressor 19, E trachea 5
It is connected with heat exchange evaporation comb 18；Main valve body 13 is respectively arranged at the two ends with a passage, and left end passage connection E capillary tube 8, right-hand member is ventilated
Hole connection C capillary tube 10, it is achieved the function of control bound 1 both sides cavity internal gas pressure difference；
When right plunger shaft 17 internal gas pressure is more than left piston chamber 20, main valve valve block 15 moves to left, and E trachea 5 connects with S trachea 6；
When left piston chamber 20 internal gas pressure is more than right plunger shaft 17, main valve valve block 15 moves to right, and D trachea 4 connects with E trachea 5.
Described pilot valve 2 is internally provided with pilot valve slide block 11, and pilot valve slide block 11 right-hand member passes through compression spring 12 with first
Pilot valve 2 is connected；Pilot valve 2 left end is provided with passage, connects with D capillary tube 7, and the other end of D capillary tube 7 is with D trachea 4 even
Logical；It is provided with some passages bottom pilot valve 2, is from left to right sequentially communicated E capillary tube 8, S capillary tube 9, C capillary tube 10, wherein
The other end of S capillary tube 9 connects with S trachea 6；
When pilot valve slide block 11 moves to left, D capillary tube 7 connects with C capillary tube 10, and E capillary tube 8 connects with S capillary tube 9；Guide
When valve slider 11 moves to right, D capillary tube 7 connects with E capillary tube 8, and C capillary tube 10 connects with S capillary tube 9.
Described solenoid 3 is arranged on pilot valve 2 right hand external, and when solenoid 3 is energized, pilot valve slide block 11 is at electromagnetism
The tension force of compression spring 12 is overcome to move to right under the magneticaction of coil 3；During solenoid 3 power-off, pilot valve slide block 11 is in compression
Move to left under the tension force effect of spring 12.
Described capillary inner diameter is 7.9mm～9.1mm, changes according to the internal diameter of main valve body 13 and adjusts, it is possible to adapts to increase
Strong air-flow.
As shown in Figure 3,4, the operation principle of freezer threeway defrosting valve is:
When solenoid 3 is in off-position, pilot valve slide block 11 moves to left under compression spring 12 drives, compressor 19
The high temperature and high pressure gas discharged enters from D trachea 4, is entered the right plunger shaft in main valve body 13 by D capillary tube 7, C capillary tube 10
17, meanwhile, in left piston chamber 20, gas is discharged, thus produces the draught head in the cavity of both sides so that piston 16 and main valve
Valve block 15 moves to left, and now E trachea 5 connects with S trachea 6, carries out normal refrigeration work circulation.
When solenoid 3 is in "on" position, pilot valve slide block 11 moves to right under the magneticaction of solenoid 3, compression
The high temperature and high pressure gas that machine 19 is discharged enters from D trachea 4, is entered the left work in main valve body 13 by D capillary tube 7, E capillary tube 8
Plug chamber 20, meanwhile, in right plunger shaft 17, gas is discharged, thus produces the draught head in both sides cavitys so that piston 16 and
Main valve valve block 15 moves to right, and now D trachea 4 connects with E trachea 5, and the high temperature and high pressure gas that compressor 19 is discharged enters heat exchange evaporation comb
18 heating and defrostings.
It is illustrated in figure 5 a kind of freezer defrosting system, uses freezer threeway as above defrosting valve to realize, including institute
Have and be sequentially connected with and formed the heat exchange evaporation comb 18 of closed loop pipeline, threeway defrosting valve 24, gas-liquid separator 21, compressor by pipeline
19, condenser 22, fluid reservoir 23, electromagnetic valve 25 and expansion valve 26；Threeway defrosting valve 24 controls cold-producing medium and flows from heat exchange evaporation comb 18
Normally freeze to compressor 19 or flow to heat exchange evaporation comb 18 heating and defrosting from compressor 19；Stream in electromagnetic valve 25 control access
Amount；In system, circuit is controlled by control electricity cabinet.
Because of freezer size, for heat exchange evaporation comb 18 more than one of refrigeration, branch connects in parallel, and often
Corresponding heat exchange evaporation comb 18, expansion valve 26 and threeway defrosting valve 24, and one in parallel of each expansion valve 26 it is equipped with on bar branch road
Check valve 27；For preventing temperature of ice house from significantly raising, heat exchange evaporation comb 18 is carried out one by one defrost, when a heat exchange evaporation comb 18 has inverse
During stream, fluid check valve 27 from this branch road passes through, and flows to remaining heat exchange evaporation comb 18 bypass line.
Further, described compressor 19 is piston compressor.
Further, described condenser 22 is cocurrent flow type condenser.
Further, described control electricity cabinet arranges display screen.
Its operation principle is described below as a example by the refrigeration storage system having three heat exchange evaporation combs:
When carrying out normal freezer refrigerating, the solenoid 3 on threeway defrosting valve 24 is in off-position, from compressor
The air vent of 19 high temperature and high pressure gas out divides two-way, the D trachea 4 on a road to threeway defrosting valve 24, now E trachea 5 and S
Trachea 6 is in connected state, and high temperature and high pressure gas rests in threeway defrosting valve 24 body；After the condensed device in another road 22, heat release becomes
For cryogenic high pressure gas-liquid mixture to fluid reservoir 23, highly pressurised liquid leads to expansion valve through three parallel branches of electromagnetic valve 25 tailing edge
26, after expenditure and pressure respectively, highly pressurised liquid becomes low temperature and low pressure steam, then arrives and absorbs heat at heat exchange evaporation comb 18, carries out normal
Freezer refrigerating.
When carrying out freezer heat exchange evaporation comb 18 heating and defrosting, if three heat exchange evaporation combs 18 carry out heating defrost and can cause simultaneously
Temperature of ice house significantly raises, and causes stored goods to go bad, so defrost must be carried out one by one.When single heat exchange evaporation comb 18 is carried out
During defrost, threeway defrosting valve 24 solenoid 3 on this branch road is energized, and D trachea 4 is connected with E trachea 5, and compressor 19 is discharged
High temperature and high pressure gas is directly entered this heat exchange evaporation comb 18 defrost, after then flowing to check valve 27, by other two-way expansion valve 26
Expenditure and pressure, enters remaining heat exchange evaporation comb 18 and freezes normally.The system of each heat exchange evaporation comb 18 is set by control electricity cabinet
Hot defrosting time, timing automatic defrosting, thus extend freezer unit durability, promote freezer refrigerating efficiency.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a freezer threeway defrosts valve, it is characterised in that include main valve (1), pilot valve (2) and solenoid (3)；
Wherein, described main valve (1) includes main valve body (13), main valve seat (14), main valve valve block (15), D trachea (4), E trachea (5)
And S trachea (6)；
Described main valve seat (14) is arranged on the inwall of main valve body (13) downside, is connected as a single entity with main valve body (13), main valve valve block
(15) it is placed on main valve seat (14)；Main valve valve block (15) two ends are respectively fixed with a piston (16), and two pistons (16) will be main
Valve body (13) inner chamber is divided into three cavitys, i.e. left piston chamber (20), main chamber, right plunger shaft (17)；In main valve body (13) upside
Portion is provided with passage, connects with D trachea (4)；Under main valve body (13), middle side part is provided with two passages, with E trachea (5) and S gas
Pipe (6) connects, and the two passage extends upward through whole main valve seat (14)；Wherein the giving vent to anger of D trachea (4) and compressor (19)
Mouth connection, S trachea (6) connects with the air intake of compressor (19), and E trachea (5) is connected with heat exchange evaporation comb (18)；Main valve body (13)
It is respectively arranged at the two ends with a passage, left end passage connection E capillary tube (8), right-hand member passage connection C capillary tube (10)；
When main valve valve block (15) moves to left, E trachea (5) connects with S trachea (6)；When main valve valve block (15) moves to right, D trachea (4)
Connect with E trachea (5)；
Described pilot valve (2) is internally provided with pilot valve slide block (11), and pilot valve slide block (11) right-hand member passes through compression spring (12)
It is connected with pilot valve (2)；Pilot valve (2) left end is provided with passage, connects with D capillary tube (7), and the other end of D capillary tube (7)
Connect with D trachea (4)；Pilot valve (2) bottom is provided with some passages, is from left to right sequentially communicated E capillary tube (8), S capillary tube
(9), C capillary tube (10), wherein the other end of S capillary tube (9) connects with S trachea (6)；
When pilot valve slide block (11) moves to left, D capillary tube (7) connects with C capillary tube (10), E capillary tube (8) and S capillary tube (9)
Connection；When pilot valve slide block (11) moves to right, D capillary tube (7) connects with E capillary tube (8), C capillary tube (10) and S capillary tube (9)
Connection；
Described solenoid (3) is arranged on pilot valve (2) right hand external, and during solenoid (3) energising, pilot valve slide block (11) is right
Move；During solenoid (3) power-off, pilot valve slide block (11) moves to left.
A kind of freezer threeway the most according to claim 1 defrosts valve, it is characterised in that described main valve body (13) internal diameter is
100～110mm.
A kind of freezer threeway the most according to claim 1 defrosts valve, it is characterised in that described capillary inner diameter is 7.9
～9.1mm.
A kind of freezer threeway the most according to claim 1 defrosts valve, it is characterised in that the width of described main valve seat (14)
Being 195～205mm, material is politef.
5. a freezer defrosting system, uses the freezer threeway defrosting valve described in claim 1 to realize, it is characterised in that bag
Include all be sequentially connected with by pipeline and form closed loop pipeline heat exchange evaporation comb (18), threeway defrosting valve (24), gas-liquid separator
(21), compressor (19), condenser (22), fluid reservoir (23), electromagnetic valve (25) and expansion valve (26)；Threeway defrosting valve (24) control
Cold-producing medium processed flows to compressor (19) normally refrigeration from heat exchange evaporation comb (18) or flows to heat exchange evaporation comb (18) system from compressor (19)
Evanescence of heat frost；Flow in electromagnetic valve (25) control access；In system, circuit is controlled by control electricity cabinet；
Because of freezer size, for heat exchange evaporation comb (18) more than one of refrigeration, branch connects in parallel, and every
Being equipped with corresponding heat exchange evaporation comb (18), expansion valve (26) and threeway defrosting valve (24) on branch road, each expansion valve (26) is in parallel
One check valve (27)；When a heat exchange evaporation comb (18) has adverse current, fluid check valve (27) from this branch road passes through, and flows to
Remaining heat exchange evaporation comb (18) bypass line.
A kind of freezer defrosting system the most according to claim 5, it is characterised in that described compressor (19) is piston type pressure
Contracting machine.
A kind of freezer defrosting system the most according to claim 5, it is characterised in that described condenser (22) is parallel flow type
Condenser.
A kind of freezer defrosting system the most according to claim 5, it is characterised in that described control electricity cabinet arranges display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610581246.1A CN106051216A (en) | 2016-07-21 | 2016-07-21 | Three-way defrosting valve for cold storage rooms and cold storage room defrosting system |
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| CN201610581246.1A CN106051216A (en) | 2016-07-21 | 2016-07-21 | Three-way defrosting valve for cold storage rooms and cold storage room defrosting system |
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| CN106051216A true CN106051216A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610581246.1A Pending CN106051216A (en) | 2016-07-21 | 2016-07-21 | Three-way defrosting valve for cold storage rooms and cold storage room defrosting system |
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| CN (1) | CN106051216A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013707A (en) * | 2017-04-10 | 2017-08-04 | 张红丽 | It is a kind of to be fluorinated white valve without decompression guided piston type freezer heat |
| CN111765270A (en) * | 2019-04-01 | 2020-10-13 | 浙江三花智能控制股份有限公司 | Four-way valve |
| CN114935220A (en) * | 2022-05-30 | 2022-08-23 | 郑州凯雪运输制冷设备有限公司 | Refrigerator set for preventing wet compression during defrosting or heating and defrosting or heating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107013707A (en) * | 2017-04-10 | 2017-08-04 | 张红丽 | It is a kind of to be fluorinated white valve without decompression guided piston type freezer heat |
| CN111765270A (en) * | 2019-04-01 | 2020-10-13 | 浙江三花智能控制股份有限公司 | Four-way valve |
| CN114935220A (en) * | 2022-05-30 | 2022-08-23 | 郑州凯雪运输制冷设备有限公司 | Refrigerator set for preventing wet compression during defrosting or heating and defrosting or heating method |
| CN114935220B (en) * | 2022-05-30 | 2024-05-24 | 郑州凯雪运输制冷设备有限公司 | Refrigerator set capable of preventing wet compression during defrosting or heating and defrosting or heating method |
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Application publication date: 20161026 |