CN101836061A - Refrigeration storage - Google Patents
Refrigeration storage Download PDFInfo
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- CN101836061A CN101836061A CN200880112805A CN200880112805A CN101836061A CN 101836061 A CN101836061 A CN 101836061A CN 200880112805 A CN200880112805 A CN 200880112805A CN 200880112805 A CN200880112805 A CN 200880112805A CN 101836061 A CN101836061 A CN 101836061A
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- 238000003860 storage Methods 0.000 title claims abstract description 23
- 238000005057 refrigeration Methods 0.000 title claims abstract description 12
- 230000007423 decrease Effects 0.000 claims description 74
- 238000001816 cooling Methods 0.000 claims description 61
- 238000005070 sampling Methods 0.000 claims description 18
- 230000000052 comparative effect Effects 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 230000007812 deficiency Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012886 linear function Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
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Classifications
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
- F25B2400/061—Several compression cycles arranged in parallel the capacity of the first system being different from the second
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a kind of refrigeration storage, has in the running of the frequency-changeable compressor (32A) by first refrigerating circuit (31A) only then under the situation of refrigerating capacity deficiency the function of the constant-speed compressor (32B) of independent second refrigerating circuit (31B) that is provided with that can turn round simultaneously.But, after frequency-changeable compressor (32A) reaches the state of maximum speed, under the continuous situation of sending the speedup instruction for 4 times of this frequency-changeable compressor (32A), just begin to start constant-speed compressor (32B).When the variation of storehouse temperature etc., can avoid unnecessarily driving constant-speed compressor (32B) with moment.
Description
Technical field
The present invention relates to a kind of refrigeration storage, relate in particular to the refrigeration storage that improvement has been carried out in the running control of the compressor that constitutes refrigerating plant.
Background technology
In the past, as a near example that cooling in the storehouse is controlled at the predetermined design temperature, the known technology that patent documentation 1 record is arranged.Wherein, refrigerating plant has the independently refrigerating circuit of 2 systems, in a refrigerating circuit, be provided with frequency-changeable compressor, in another refrigerating circuit, be provided with constant-speed compressor, when the cooling running, detected storehouse temperature and design temperature are compared, according to its temperature difference frequency-changeable compressor is increased and decreased speed control system, thereby will maintain in the storehouse near the design temperature.In addition, cause storehouse temperature significantly to rise in the switching of Yin Men, frequency-changeable compressor reaches maximum speed and when having temperature difference more than predetermined between storehouse temperature and design temperature, drive the constant-speed compressor of another refrigerating circuit in the lump, thereby apace in the cold room, if storehouse temperature descends, then constant-speed compressor is stopped.
Patent documentation 1:JP spy opens the 2005-16874 communique
Summary of the invention
(problem that invention will solve)
Yet when shutter door as mentioned above, if its short time, near the temperature moment when opening the storehouse temperature sensor significantly rises, and drops sharply to the temperature higher slightly than original temperature behind the door closing.
Therefore, in above-mentioned existing control method, start constant-speed compressor, but because storehouse temperature descends immediately, so constant-speed compressor stops very soon by detecting the storehouse temperature that moment significantly rises.Promptly, carried out repeatedly we can say the driving of unnecessary constant-speed compressor and stopping, therefore power consumption increases in vain, and because only short-time running of constant-speed compressor, therefore exists lubricating oil can't fully spread all in the portion of mechanism and causes insufficient lubrication etc. to diminish reliability problems.
The present invention finishes in view of above situation, and its purpose is to suppress the unnecessary running of this compressor when the driving by complementary compressor replenishes refrigerating capacity not enough.
(means that are used to deal with problems)
Refrigeration storage of the present invention is characterised in that, is provided with: refrigerating plant, have a plurality of independently refrigerating circuits, and the compressor of ability type variable is set in one of the main refrigerating circuit therein; Storage device stores the cooling target based on the related predetermined physical quantities of cooling in the storehouse; And operation controller, according to output from the physical quantity transducer that detects above-mentioned physical quantity, the capacity variation that makes above-mentioned compressor is so that the approaching cooling target of reading from above-mentioned storage device of above-mentioned physical quantity, and also require this compressor to increase the compressor that drives other refrigerating circuits under the situation of ability simultaneously at the state that above-mentioned compressor is in the performance maximum capacity, and, possess the driving restraint device in above-mentioned operation controller, this driving restraint device continues just to begin under the situation of the scheduled time to allow the driving of the compressor of above-mentioned other refrigerating circuits in the requirement to the above-mentioned increase ability of the compressor of above-mentioned main refrigerating circuit.
According to this formation, refrigerating capacity at the main refrigerating circuit of the compressor by having the ability type variable only is then not enough, and will utilize the refrigerating capacity of other refrigerating circuits simultaneously the time, brought into play at the compressor of main refrigerating circuit under the state of maximum capacity, continued to carry out just to begin to drive under the situation of the scheduled time compressor of other refrigerating circuits to the requirement of the increase ability of this compressor.
In this control mode, the storehouse temperature of the moment that produces for the switching etc. of the short time of following door changes, and can drive the compressor of other refrigerating circuits necessarily.Therefore suppressed the increase of power consumption, can avoid in addition because of the compressor of other refrigerating circuits only short-time running produce the situation that lubricating oil can't fully spread all over, thereby can guarantee the reliability of the driving of this compressor.
In addition, also can be following formation.
(1) be provided with: refrigerating plant, have a plurality of independently refrigerating circuits, the compressor of ability type variable is set in one of the main refrigerating circuit therein; Storage device, as data store become that the expression of target temperature descends through the time variation pattern cooling characteristics; Temperature sensor is used to detect storehouse temperature; And operation controller, according to output from this temperature sensor, make above-mentioned main refrigerating circuit above-mentioned compressor capacity variation so that above-mentioned storehouse temperature descend according to the above-mentioned cooling characteristics of reading from above-mentioned storage device, and also require this compressor to increase the compressor that drives other refrigerating circuits under the situation of ability simultaneously at the state that above-mentioned compressor is in the performance maximum capacity, and, possess the driving restraint device in above-mentioned operation controller, this driving restraint device continues just to begin under the situation of the scheduled time to allow the driving of the compressor of above-mentioned other refrigerating circuits in the requirement to the above-mentioned increase ability of the compressor of above-mentioned main refrigerating circuit.
(2) compressor of above-mentioned main refrigerating circuit is the frequency-changeable compressor of speed-controllable, and above-mentioned operation controller comprises: the variations in temperature calculating part, according to the predetermined sampling time, according to the decline degree of the calculated signals storehouse temperature of said temperature sensor; Target temperature decline degree efferent, according to above-mentioned sampling time according to the above-mentioned cooling characteristics that is stored in the above-mentioned storage device, export the temperature decline degree of target of the storehouse temperature in this sampling time; Comparing section compares to the temperature decline degree of the reality that calculated by said temperature change calculations portion with from the temperature decline degree of the target of above-mentioned target temperature decline degree efferent output; With the fast instruction department of increase and decrease, comparative result according to this comparing section, when the temperature decline degree of above-mentioned reality is spent less than the temperature decline of above-mentioned target, send the speedup instruction to above-mentioned frequency-changeable compressor, when the temperature decline degree of above-mentioned reality is spent greater than the temperature decline of above-mentioned target, send deceleration instruction to above-mentioned frequency-changeable compressor, and, above-mentioned driving restraint device is allowed the driving of the compressor of above-mentioned other refrigerating circuits when the frequency-changeable compressor of above-mentioned main refrigerating circuit is under the state of maximum speed continuously pre-determined number and sends above-mentioned speedup instruction.
At this, temperature decline degree is defined as the temperature slippage of time per unit.
In this constitutes, the frequency-changeable compressor of main refrigerating circuit at first only turns round, calculate actual temperature decline degree according to the predetermined sampling time and based on detected storehouse temperature, export the temperature decline degree of the target of this storehouse temperature in addition from the data of cooling characteristics, when the temperature decline degree of reality is spent less than the temperature decline of target, frequency-changeable compressor is carried out speedup control, otherwise, and cool off according to cooling characteristics to the frequency-changeable compressor control of slowing down.At this, only the refrigerating capacity of the main refrigerating circuit by having frequency-changeable compressor is then not enough, and will utilize the refrigerating capacity of other refrigerating circuits simultaneously the time, frequency-changeable compressor at main refrigerating circuit is under the state of maximum speed, just begins to drive the compressor of other refrigerating circuits under the speedup of this frequency-changeable compressor is instructed the situation of sending pre-determined number continuously.
In this control mode, the storehouse temperature of the moment that produces for the switching etc. of the short time of following door changes, and can drive the compressor of other refrigerating circuits necessarily.Therefore suppressed the increase of power consumption, can avoid in addition because of the compressor of other refrigerating circuits only short-time running produce the situation that lubricating oil can't fully spread all over, thereby can guarantee the reliability of the driving of this compressor.
(3) above-mentioned driving restraint device has: counter, send the number of times of above-mentioned speedup instruction and accumulate when the frequency-changeable compressor of above-mentioned main refrigerating circuit is in maximum speed; And drive control part, the compressor to above-mentioned other refrigerating circuits when the accumulated value of this counter has reached predetermined value sends the driving signal.
In this constitutes, when being in maximum speed,, then its number of times is accumulated the frequency-changeable compressor of main refrigerating circuit with counter if send the speedup instruction, after reaching predetermined value, accumulated value just drives the compressor of other refrigerating circuits.
(4) above-mentioned operation controller has following function: after having driven the compressor of above-mentioned other refrigerating circuits at the same time, also based on the comparative result of above-mentioned comparing section the frequency-changeable compressor of above-mentioned main refrigerating circuit is sent the instruction of increase and decrease speed.
In this constituted, behind the compressor that has driven other refrigerating circuits, the frequency-changeable compressor of main refrigerating circuit remained in operation, this frequency-changeable compressor based on the comparison portion comparative result and by increase and decrease speed control system.
(invention effect)
According to the present invention, when carrying out storehouse temperature control, can suppress the unnecessary running of the compressor of other refrigerating circuits, thereby can suppress the increase of power consumption, and can guarantee the reliability of the driving of this compressor.
Description of drawings
Fig. 1 is the stereoscopic figure of the freezer of an embodiment of the invention.
Fig. 2 is near the cutaway view position of being provided with of refrigerating plant.
Fig. 3 is the circuit structure figure of refrigerating plant.
Fig. 4 is the block diagram of the controlling organization portion of compressor.
Fig. 5 is the chart of expression cooling characteristics.
Fig. 6 is the flow chart of the running control of compressor.
Label declaration
30 ... refrigerating plant, 31A ... first refrigerating circuit, 31B ... second refrigerating circuit, 32A ... frequency-changeable compressor (compressor of ability type variable), 32B ... constant-speed compressor, 39 ... the storehouse temperature sensor, 40 ... control part, 42 ... data store, 44 ... negative circuit, 45 ... the variations in temperature calculating part, 46 ... target temperature decline degree efferent, 47 ... comparing section, 48 ... increase and decrease fast instruction department, 50 ... counter, TR ... storehouse temperature, TL ... (design temperature To's) lower limit temperature (cooling lower limit temperature), Xp, Xc ... the temperature curve of target (cooling characteristics), A, Ap, Ac ... the temperature decline degree of target, S ... actual temperature decline degree
The specific embodiment
＜embodiment 〉
Followingly an embodiment of the invention are described according to Fig. 1 to Fig. 6.In the present embodiment example the vertical freezer of professional usefulness.
In Fig. 1 and Fig. 2, label 10 is freezer main bodys that the heat insulating box by front openings constitutes, and inside is refrigerating chamber 11, and the insulated door 12 of a pair of up and down double door formula is installed on the front openings of refrigerating chamber 11.Freezer main body 10 is supported by the foot 13 that is disposed at four jiaos of bottom surfaces, constitutes Machine Room 14 by erectting sheet material around in the above.
Form square peristome 15 in substantial middle portion as the roof 10A of the freezer main body 10 of the bottom surface of Machine Room 14, and with the top mode mounting of blocking this peristome 15 unit platform 20 is arranged, this unit platform 20 is equipped with the refrigerating plant 30 of the blocking of write up hereinafter.The position of the peristoma below the front side (right side of Fig. 2) of peristome 15 is equipped with the cooling pipe 22 that is also used as drain pan with descending grade, and is formed with evaporator room 23 between this cooling pipe 22 and unit platform 20 towards rear wall.Front at cooling pipe 22 forms suction inlet 25, is equipped with storehouse internal fan 26 in its inside, and is formed with blow-off outlet 27 in the rear end side of cooling pipe 22.
Refrigerating plant 30 has the independently refrigerating circuit of 2 systems, i.e. first refrigerating circuit 31A (being equivalent to main refrigerating circuit of the present invention) and the second refrigerating circuit 31B (being equivalent to other refrigerating circuits of the present invention).Two refrigerating circuit 31A, 31B roughly, compressor differs from one another, but shared evaporimeter and condenser.
Be schematically shown as Fig. 3, the first refrigerating circuit 31A is by connecting the variable frequency-changeable compressor 32A of rotating speed, shared condenser 33, drier 35A with refrigerant piping circulation, forming as the capillary 36A of pressure relief mechanism and shared evaporimeter 37.In addition, in the first refrigerating circuit 31A, on the refrigerant piping of the outlet side of evaporimeter 37, be folded with and store up device 38.
The second refrigerating circuit 31B is by connecting the certain constant-speed compressor 32B of rotating speed, shared condenser 33, drier 35B with refrigerant piping circulation, forming as the capillary 36B of pressure relief mechanism and shared evaporimeter 37.
In the formation accessory of two refrigerating circuit 31A, 31B, frequency-changeable compressor 32A, constant-speed compressor 32B, shared condenser 33, two drier 35A, 35B, two capillary 36A, 36B be arranged on unit platform 20 above, shared evaporimeter 37 then suspention is installed in the following side of unit platform 20, thus blocking.In addition, be provided with shared condenser fan 34 at the back side of shared condenser 33.Unit platform 20 blocks the peristome 15 of roof 10A of freezer main body 10 and during mounting, evaporimeter 37 is housed in the position of the rear side of storehouse internal fan 26 in evaporator room 23.
Basically, when driving refrigerating plant 30 and storehouse internal fan 26, shown in the arrow of Fig. 2, air in the refrigerating chamber 11 is attracted in the evaporator room 23 from suction inlet 25, and will during by evaporimeter 37, be blown out to the refrigerating chamber 11 from blow-off outlet 27 by the cold air by the heat exchange generation, cool off in the refrigerating chamber 11 by such circulation.
In the present embodiment, adopted the means of controlling the temperature (storehouse temperature) in the refrigerating chamber 11 along predetermined temperature curve, below be described.
Comprise as the type of cooling in the storehouse: control cooling will maintain in the storehouse near the design temperature; And quick-frozen (pull-down) cooling, when the rising because of the increase of storehouse internal loading or environment temperature causes storehouse temperature to rise, make in the storehouse rapid cooling near design temperature.
As control device, as shown in Figure 4, the control part 40 possess microcomputer etc. and to carry out preset program is set, and is received in the top Denso case 28 of being located at unit platform 20.This control part 40 is equivalent to operation controller of the present invention.Input side at control part 40 connects the storehouse temperature sensor 39 that is used to detect storehouse temperature, and this storehouse temperature sensor 39 is arranged on the downstream of the storehouse internal fan 26 in the evaporator room 23 as shown in Figure 2.
Clock signal generating unit 41 and data store 42 (being equivalent to storage device of the present invention) are set in control part 40, temperature curve Xc, the Xp of the target when as shown in Figure 5, in this data store 42, storing when cooling control and quick-frozen cooling as data.
The control area is that the quick-frozen zone is the zone that has surpassed ceiling temperature TH than the ceiling temperature TH of the high predetermined value of predetermined design temperature To (for example 1K) with than the temperature province between the lower limit temperature TL of the low predetermined value (for example 2K) of design temperature To.
The temperature curve Xp of the target in quick-frozen zone represents with the straight line of the linear function of steeper slope, the storehouse temperature decline degree that this temperature curve Xp relates to (the temperature slippage of time per unit: Δ T/ Δ t), irrelevant and be fixed value Ap (K/min) with storehouse temperature as target.In addition, the storehouse temperature decline degree Ap as target abbreviates desired value Ap sometimes as.
The temperature curve Xp of the target when the temperature curve Xc of the target of control area uses and cools off with quick-frozen compare slope the straight line of slow linear function represent.In this temperature curve Xc, fixing as the storehouse temperature decline degree Ac (K/min) (abbreviating desired value Ac sometimes as) of target, it is less value that target temperature decline degree (desired value) Ap when still cooling off with quick-frozen compares.
In addition, in the flow chart of Fig. 6, the unified target temperature decline degree A that is labeled as of target temperature decline degree (desired value) Ac when target temperature decline degree (desired value) Ap when quick-frozen is cooled off and control cooling, but in the quick-frozen zone,, in the control area, export " Ac " as target temperature decline degree A as target temperature decline degree A output " Ap ".
Temperature curve Xp, the Xc of the target in two zones is stored in the data store 42 of control part 40, uses when the program that execution cooling running relates to.
Outlet side at control part 40 is connected with above-mentioned frequency-changeable compressor 32 through negative circuit 44.The rotating speed of the frequency-changeable compressor 32A of present embodiment for example divides 5 grades of switchings.
In order to carry out basic cooling control, in control part 40, be provided with: variations in temperature calculating part 45, according to the predetermined sampling time, according to the decline degree of the calculated signals storehouse temperature of storehouse temperature sensor 39; Target temperature decline degree efferent 46, according to this in sampling time according to being stored in the temperature curve Xp of the target in the data store 42, the data of Xc, export the temperature decline degree A of target of the storehouse temperature in this sampling time; Comparing section 47 compares to the temperature decline degree S of the reality that calculated by variations in temperature calculating part 45 with from the temperature decline degree A of the target of target temperature decline degree efferent 46 outputs; With the fast instruction department 48 of increase and decrease,, send the instruction of increase and decrease speed to negative circuit 44 according to the comparative result of this comparing section 47.
In this embodiment, the sampling time for example is set at 0.5 minute.
And control part 40 possesses following characteristic function.That is, under the state of above-mentioned frequency-changeable compressor 32A,, then start the constant-speed compressor 32B of the second refrigerating circuit 31B if send the speedup instruction from increasing and decreasing fast instruction department 48 with the maximum speed running.But this constant-speed compressor 32B just begins to drive under speedup is instructed the situation of sending pre-determined number (being 4 times in the present embodiment) continuously.Therefore, at the outlet side connection constant-speed compressor 32B of control part 40, and in control part 40, be provided with: rotating speed test section 49, the rotating speed of detection frequency-changeable compressor 32A; Counter 50 is counted the quantity of sending the speedup instruction; And drive control part, after reaching predetermined value (3 times), also sends the accumulated value of this counter 50 under the situation of speedup instruction, send the driving signal to constant-speed compressor 32B.
The part of the above function of performance is equivalent to driving restraint device of the present invention in the control part 40.
And then, in control part 40, be provided with following function.
After having driven constant-speed compressor 32B by above-mentioned control, frequency-changeable compressor 32A still remains in operation, frequency-changeable compressor 32A based on the comparison portion 47 comparative result and by increase and decrease speed control system.
Under the situation that frequency-changeable compressor 32A and constant-speed compressor 32B all turn round, send deceleration instruction if be at frequency-changeable compressor 32A under the state of minimum speed to this frequency-changeable compressor 32A, constant-speed compressor 32B is stopped.
When detecting storehouse temperature TR and reached predetermined cooling lower limit temperature (being the lower limit temperature TL of design temperature To in the present embodiment), frequency-changeable compressor 32A is stopped.
Next, with reference to the action of the flowchart text present embodiment of Fig. 5 and Fig. 6.
Basic cooling control from the quick-frozen zone to the control area at first is described.In the flow chart of Fig. 6, according to predetermined sampling time detection storehouse temperature TR (step S1), in step S2, judge this storehouse temperature TR, because the quick-frozen zone is the temperature province that has surpassed the ceiling temperature TH of design temperature To, therefore carry out the judgement of " TH＜TR ", starting frequency-changeable compressor 32A in step S3 when on-stream (keep on the go).In step S4, calculate actual storehouse temperature decline degree S, and the desired value Ap of the storehouse temperature decline degree that in following step S5 the temperature curve Xp of the calculated value S of above-mentioned storehouse temperature decline degree and the quick-frozen cooling usefulness of reading from data store 42 is related to compares according to detected storehouse temperature TR thereupon.
Calculated value S is during less than desired value Ap, in step S6, frequency-changeable compressor 32A is sent the speedup instruction, if current rotating speed is not that maximum speed (step S7 is a "No") then increases rotating speed one-level (step S8), if maximum speed (step S7 is a "Yes") is then kept this rotating speed.When calculated value S equated with desired value Ap, frequency-changeable compressor 32A kept current rotating speed (step S9).Calculated value S is during greater than desired value Ap, in step S10, frequency-changeable compressor 32A is sent deceleration instruction, if the current rotating speed of frequency-changeable compressor 32A is not that minimum speed (step S11 is a "No") then reduces rotating speed one-level (step S12), if minimum speed (step S11 is a "Yes") is then kept this rotating speed.
Carry out above control repeatedly according to the predetermined sampling time, thereby carry out the quick-frozen cooling along the temperature curve Xp of the target in quick-frozen zone shown in Figure 5.
The quick-frozen cooling advances, storehouse temperature TR drops to below the ceiling temperature TH, when promptly entering the control area, in step S2, carry out the judgement of " TL≤TR≤TH ", the state (step S13) that keeps frequency-changeable compressor 32A continuous running, similarly calculate storehouse temperature decline degree S in step S4, then the desired value Ac of the storehouse temperature decline degree that this time the temperature curve Xc of the calculated value S of above-mentioned storehouse temperature decline degree and the control cooling usefulness of reading from data store 42 is related in step S5 compares.
Similarly, as calculated value S during less than desired value Ac, frequency-changeable compressor 32A is sent speedup instruction (step S6), if current rotating speed is not that maximum speed (step S7 is a "No") then increases rotating speed one-level (step S8), if maximum speed (step S7 is a "Yes") is then kept this rotating speed.When calculated value S equated with desired value Ac, frequency-changeable compressor 32A kept current rotating speed (step S9).Calculated value S is during greater than desired value Ac, frequency-changeable compressor 32A is sent deceleration instruction (step S10), if the current rotating speed of frequency-changeable compressor 32A is not that minimum speed (step S11 is a "No") then reduces rotating speed one-level (step S12), if minimum speed (step S11 is a "Yes") is then kept this rotating speed.
Carry out above control repeatedly according to the predetermined sampling time, thereby control cooling along the temperature curve Xc of the target of control area shown in Figure 5.
The control cooling advances, and when storehouse temperature TR drops to the temperature of the lower limit temperature TL that is lower than design temperature To, carries out the judgement of " TL＞TR " in step S2, based on this judgement, in step S14 frequency-changeable compressor 32A is stopped.
Afterwards, as shown in Figure 5, wait for rising naturally of storehouse temperature, when storehouse temperature TR turns back to the ceiling temperature TH of design temperature To, begin once again to control according to the cooling of the temperature curve Xc of the target of control area.
During above-mentioned control cooling, when environment temperature rising or the increase of storehouse internal loading, in order to cool off, to have and reach under the state of maximum speed (step S7 is a "Yes") at frequency-changeable compressor 32A and also send the situation (step S6) of speedup instruction to frequency-changeable compressor 32A along temperature curve Xc ground.At this moment, so long as after stopping (step S15 is a "No") from constant-speed compressor 32B, the count value N of counter 50 then makes counter 50 add " 1 " in step S17 less than " 3 " (step S16 is a "No").In the ensuing 2 times sampling time, instruct if all send speedup, then the count value N of counter 50 becomes " 3 " (step S16 is a "Yes"), if therefore in the next sampling time, further send the speedup signal, then in step S18, start constant-speed compressor 32B, after in step S19, counter 50 being resetted, return step S1.
Afterwards, under the state that frequency-changeable compressor 32A and constant-speed compressor 32B all turn round, similarly the desired value Ac of the storehouse temperature decline degree of the calculated value S of storehouse temperature decline degree and control cooling usefulness is compared with above-mentioned, the rotating speed of frequency-changeable compressor 32A is increased and decreased speed control system according to its comparative result.
At this, being in the state of maximum speed from frequency-changeable compressor 32A, continuous to send the reason that the speedup instruction just begins to start constant-speed compressor 32B for 4 times be as follows.That is, avoid all starting constant-speed compressor 32B one by one at the increase of the storehouse internal loading of moment.
For example, if near temperature moment of opening the allocation position of 12 storehouse temperature sensors 39 of insulated door significantly rises, therefore in the next sampling time, in step S2, be judged as " TH＜TR ", in step S5, compare the calculated value S of storehouse temperature decline degree and the desired value Ap that the storehouse temperature decline degree of usefulness is cooled off in quick-frozen.At this moment, calculated value S is certainly less than desired value Ap (S＜Ap), therefore frequency-changeable compressor 32A is sent speedup instruction (step S6), when frequency-changeable compressor 32A is in maximum speed (step S7 is a "Yes"), if the restriction of carrying out as the numerical value of the counter 50 of the feature of present embodiment (step S16) will not started constant-speed compressor 32B in step S18.
Afterwards, if insulated door 12 was just closed through the short time, then the air circulation in the refrigerating chamber 11 imports near the storehouse temperature sensor 39, and the temperature in the whole freezing chamber 11 rise and are not really high, and therefore the storehouse temperature TR that is detected by storehouse temperature sensor 39 drops sharply to than the high slightly temperature of opening before the insulated door 12 of temperature.At this moment, if the constant-speed compressor 32B that remains in operation, then refrigerating capacity is superfluous and can become so-called overcooled state, therefore need stop constant-speed compressor 32B.On the contrary, when existing the short time to open and close the increase of storehouse internal loading of 12 moments such as grade of insulated door, do not need to start constant-speed compressor 32B, in addition if make only short-time running of constant-speed compressor 32B as mentioned above, then lubricating oil can't fully spread all in the portion of mechanism and may cause insufficient lubrication.
Therefore, in the present embodiment, the state that is in maximum speed from frequency-changeable compressor 32A begins to send the speedup instruction 4 times and just start constant-speed compressor 32B continuously as mentioned above, thereby under the situation about increasing in storehouse internal loading so-called moment, the starting of inhibition constant-speed compressor 32B.
In addition, if time of opening of insulated door 12 is longer, then after closing insulated door 12, also exists storehouse temperature to rise to the quick-frozen zone and stay in this possibility.At this moment, carry out quick-frozen cooling control, send the speedup instruction to frequency-changeable compressor 32A, make frequency-changeable compressor 32A speedup, after reaching maximum speed (step S7 is a "Yes"), (step S16 is a "Yes") sent in the instruction of wait speedup continuously 4 times, just starting constant-speed compressor 32B in step S18.
After this, under the state that frequency-changeable compressor 32A and constant-speed compressor 32B all turn round, the desired value Ap that the storehouse temperature decline degree of usefulness is cooled off in the calculated value S and the quick-frozen of storehouse temperature decline degree compares, according to its comparative result the rotating speed of frequency-changeable compressor 32A is increased and decreased speed control system, carry out the quick-frozen cooling with temperature curve Xp along the target in quick-frozen zone.
Its result, if storehouse temperature TR drops to the control area, then the desired value Ac that the storehouse temperature decline degree of usefulness is cooled off in the calculated value S and the control of storehouse temperature decline degree compares, make the rotating speed increase and decrease speed of frequency-changeable compressor 32A according to its comparative result, control cooling with temperature curve Xc along the target of control area.
In addition, under the state that frequency-changeable compressor 32A and constant-speed compressor 32B all turn round (step S20 is a "Yes"), under the situation of carrying out quick-frozen cooling control or control cooling control, the calculated value S of storehouse temperature decline degree uses greater than the quick-frozen cooling or the desired value Ap of the storehouse temperature decline degree of control cooling usefulness if be judged as in step S5, Ac (S＞A), then in step S 10, frequency-changeable compressor 32A is sent deceleration instruction, and if this frequency-changeable compressor 32A becomes the state (step S11 is a "Yes") of minimum speed and also frequency-changeable compressor 32A sent deceleration instruction, then in step S21, constant-speed compressor 32B is stopped.
After this, frequency-changeable compressor 32A remains in operation, the desired value Ap that uses or control the storehouse temperature decline degree of cooling usefulness is cooled off in calculated value S and quick-frozen to storehouse temperature decline degree, Ac compares, according to its comparative result the rotating speed of frequency-changeable compressor 32A is increased and decreased speed control system, with the temperature curve Xp along the target of quick-frozen zone or control area, Xc carries out quick-frozen cooling or control cooling.
The control cooling advances, and as mentioned above, when storehouse temperature TR drops to the temperature of the lower limit temperature TL that is lower than design temperature To, carries out the judgement of " TL＞TR " in step S2, based on this judgement frequency-changeable compressor 32A is stopped (step S14).
As mentioned above according to present embodiment, then have by the constant-speed compressor 32B of the independent second refrigerating circuit 31B that is provided with of running simultaneously under the situation of refrigerating capacity deficiency in the device of function of additional refrigerating capacity in the running of the frequency-changeable compressor 32A by the first refrigerating circuit 31A only, behind the state that reaches maximum speed from frequency-changeable compressor 32A this frequency-changeable compressor 32A under the continuous situation of sending the speedup instruction for 4 times, is just started constant-speed compressor 32B.
By adopting this control mode, the storehouse temperature of the moment that produces for the switching of the short time of following insulated door 12 etc. changes, and can drive constant-speed compressor 32B necessarily.Therefore suppressed the increase of power consumption.Can avoid in addition because of constant-speed compressor 32B only short-time running produce the situation that lubricating oil can't fully spread all over, thereby can guarantee the reliability of the driving of this constant-speed compressor 32B.
＜other embodiments 〉
The invention is not restricted to the illustrated embodiment of above-mentioned record and accompanying drawing, for example following embodiment is also contained in the technical scope of the present invention.
(1) in the above-described embodiment, example the compressor of complementary second refrigerating circuit that uses be the situation of constant-speed compressor, but the compressor of complementary refrigerating circuit also can use frequency-changeable compressor.
(2) also can possess the above independently refrigerating circuit of 3 systems, one of them refrigerating circuit with the refrigerating circuit of deciding, is used as complementary refrigerating circuit with other refrigerating circuits.
(3) in the above-described embodiment, when starting constant-speed compressor in order to replenish refrigerating capacity, reach the state of maximum speed from frequency-changeable compressor after, send the speedup instruction for 4 times and just begin to start constant-speed compressor this frequency-changeable compressor is continuous, thereby avoid the starting of unnecessary constant-speed compressor, but the number of times of speedup instruction is not limited to 4 times, also can be other number of times according to the conditions such as interval in sampling time.
(4) in the above-described embodiment, as the data instance of the control cooling characteristics of target the straight line of linear function, but also can use the data of representing with the quadratic function of temperature-time or make storehouse temperature and the contrast of the temperature decline degree of target with reference to form.
(5) in the above-described embodiment, corresponding according to the cooling characteristics example expression storehouse temperature through the time variation pattern characteristic, but also can represent in addition yardstick, for example cold-producing medium of cooling device side low pressure, evaporating temperature through the time variation pattern.
(6) and then, near the method as cooling in the storehouse being controlled at the predetermined design temperature also can increase and decrease speed control system frequency-changeable compressor according to the design temperature of storehouse temperature and the deviation of actual detection temperature.In addition, can also increase and decrease speed control system frequency-changeable compressor according to the setting pressure of the low pressure of cold-producing medium with by the design temperature of the evaporating temperature of the deviation of detected this detected pressures of pressure sensor or cold-producing medium with by the deviation of detected this detected temperatures of temperature sensor.
(7) in the above-described embodiment, as the means example of the refrigerating capacity of adjusting cooling device use the situation of frequency-changeable compressor as compressor, but be not limited thereto, also can use the compressor of other volume-variable formulas such as compressor that have offloading functions with a plurality of inflators and inflator number that adjustment will drive according to load.
(8) the invention is not restricted to the freezer of above-mentioned embodiment example, can be widely used in other refrigeration storages such as freezing-cooling storeroom, freezer, constant temperature high humidity storehouse.
Claims (5)
1. a refrigeration storage is characterized in that,
Be provided with: refrigerating plant, have a plurality of independently refrigerating circuits, the compressor of ability type variable is set in one of the main refrigerating circuit therein;
Storage device stores the cooling target based on the related predetermined physical quantities of cooling in the storehouse; With
Operation controller, according to output from the physical quantity transducer that detects above-mentioned physical quantity, the capacity variation that makes above-mentioned compressor is so that the approaching cooling target of reading from above-mentioned storage device of above-mentioned physical quantity, and also require this compressor to increase the compressor that drives other refrigerating circuits under the situation of ability simultaneously at the state that above-mentioned compressor is in the performance maximum capacity
And, possess the driving restraint device in above-mentioned operation controller, this driving restraint device continues just to begin under the situation of the scheduled time to allow the driving of the compressor of above-mentioned other refrigerating circuits in the requirement to the above-mentioned increase ability of the compressor of above-mentioned main refrigerating circuit.
2. a refrigeration storage is characterized in that,
Be provided with: refrigerating plant, have a plurality of independently refrigerating circuits, the compressor of ability type variable is set in one of the main refrigerating circuit therein;
Storage device, as data store become that the expression of target temperature descends through the time variation pattern cooling characteristics;
Temperature sensor is used to detect storehouse temperature; With
Operation controller, according to output from this temperature sensor, make above-mentioned main refrigerating circuit above-mentioned compressor capacity variation so that above-mentioned storehouse temperature descend according to the above-mentioned cooling characteristics of reading from above-mentioned storage device, and also require this compressor to increase the compressor that drives other refrigerating circuits under the situation of ability simultaneously at the state that above-mentioned compressor is in the performance maximum capacity
And, possess the driving restraint device in above-mentioned operation controller, this driving restraint device continues just to begin under the situation of the scheduled time to allow the driving of the compressor of above-mentioned other refrigerating circuits in the requirement to the above-mentioned increase ability of the compressor of above-mentioned main refrigerating circuit.
3. refrigeration storage according to claim 2 is characterized in that,
The compressor of above-mentioned main refrigerating circuit is the frequency-changeable compressor of speed-controllable, and,
Above-mentioned operation controller comprises: the variations in temperature calculating part, according to the predetermined sampling time, according to the decline degree of the calculated signals storehouse temperature of said temperature sensor;
Target temperature decline degree efferent, according to above-mentioned sampling time according to the above-mentioned cooling characteristics that is stored in the above-mentioned storage device, export the temperature decline degree of target of the storehouse temperature in this sampling time;
Comparing section compares to the temperature decline degree of the reality that calculated by said temperature change calculations portion with from the temperature decline degree of the target of above-mentioned target temperature decline degree efferent output; With
Increase and decrease fast instruction department, comparative result according to this comparing section, when the temperature decline degree of above-mentioned reality is spent less than the temperature decline of above-mentioned target, send the speedup instruction to above-mentioned frequency-changeable compressor, when the temperature decline degree of above-mentioned reality is spent greater than the temperature decline of above-mentioned target, send deceleration instruction to above-mentioned frequency-changeable compressor
And above-mentioned driving restraint device is allowed the driving of the compressor of above-mentioned other refrigerating circuits when the frequency-changeable compressor of above-mentioned main refrigerating circuit is under the state of maximum speed continuously pre-determined number and sends above-mentioned speedup instruction.
4. refrigeration storage according to claim 3 is characterized in that,
Above-mentioned driving restraint device has: counter, send the number of times of above-mentioned speedup instruction and accumulate when the frequency-changeable compressor of above-mentioned main refrigerating circuit is in maximum speed; And drive control part, the compressor to above-mentioned other refrigerating circuits when the accumulated value of this counter has reached predetermined value sends the driving signal.
5. according to claim 3 or 4 described refrigeration storages, it is characterized in that,
Above-mentioned operation controller has following function: after having driven the compressor of above-mentioned other refrigerating circuits at the same time, also based on the comparative result of above-mentioned comparing section the frequency-changeable compressor of above-mentioned main refrigerating circuit is sent the instruction of increase and decrease speed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007276481A JP5421526B2 (en) | 2007-10-24 | 2007-10-24 | Cooling storage |
| JP2007-276481 | 2007-10-24 | ||
| PCT/JP2008/067442 WO2009054225A1 (en) | 2007-10-24 | 2008-09-26 | Refrigeration storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101836061A true CN101836061A (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880112805A Pending CN101836061A (en) | 2007-10-24 | 2008-09-26 | Refrigeration storage |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5421526B2 (en) |
| CN (1) | CN101836061A (en) |
| WO (1) | WO2009054225A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62299656A (en) * | 1986-06-19 | 1987-12-26 | 三洋電機株式会社 | Operation controller for refrigerator |
| JP2005016874A (en) * | 2003-06-27 | 2005-01-20 | Matsushita Electric Ind Co Ltd | Freezing and refrigerating unit and refrigerator |
| JP2005121341A (en) * | 2003-10-20 | 2005-05-12 | Hoshizaki Electric Co Ltd | Cooling storage |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6291755A (en) * | 1985-10-16 | 1987-04-27 | 株式会社日立製作所 | Refrigerator functioning as capacity control in combination |
-
2007
- 2007-10-24 JP JP2007276481A patent/JP5421526B2/en active Active
-
2008
- 2008-09-26 WO PCT/JP2008/067442 patent/WO2009054225A1/en active Application Filing
- 2008-09-26 CN CN200880112805A patent/CN101836061A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62299656A (en) * | 1986-06-19 | 1987-12-26 | 三洋電機株式会社 | Operation controller for refrigerator |
| JP2005016874A (en) * | 2003-06-27 | 2005-01-20 | Matsushita Electric Ind Co Ltd | Freezing and refrigerating unit and refrigerator |
| JP2005121341A (en) * | 2003-10-20 | 2005-05-12 | Hoshizaki Electric Co Ltd | Cooling storage |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009054225A1 (en) | 2009-04-30 |
| JP5421526B2 (en) | 2014-02-19 |
| JP2009103379A (en) | 2009-05-14 |
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Application publication date: 20100915 |