CN104160224A - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
CN104160224A
CN104160224A CN201380011532.9A CN201380011532A CN104160224A CN 104160224 A CN104160224 A CN 104160224A CN 201380011532 A CN201380011532 A CN 201380011532A CN 104160224 A CN104160224 A CN 104160224A
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CN
China
Prior art keywords
refrigerating chamber
refrigerating
cooling
mode
evaporimeter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201380011532.9A
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Chinese (zh)
Inventor
境寿和
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Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CN104160224A publication Critical patent/CN104160224A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00Compression machines, plants or systems, with several condenser circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04Preventing the formation of frost or condensate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0403Refrigeration circuit bypassing means for the condenser

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

A refrigerator comprises a refrigeration cycle having at least a compressor (19), an evaporator (20), and a condenser (21); and the refrigerator has the condenser (21) as the main component of a forced air cooling system, a flow channel switching valve (40) connected to the downstream side of the main component condenser (21), and a plurality of anti-moisture pipes (44, 41) downstream of the flow channel switching valve (40). When the refrigeration cycle is operating under normal conditions, refrigerant is channeled alternately to the plurality of anti-moisture pipes (44, 41), and when the refrigeration cycle is operating under overload conditions, refrigerant is channeled to the plurality of anti-moisture pipes (44, 41) in parallel.

Description

Freezer
Technical field
The present invention relates to by have to refrigerating chamber and refrigerating chamber block respectively cold air air door (Damper) thereby, independent cooling refrigerating chamber and refrigerating chamber improve the freezer of the efficiency of kind of refrigeration cycle respectively to use 1 evaporimeter.
Background technology
From energy-conservation viewpoint, in family expenses freezer, have by with 1 evaporimeter, independent cooling refrigerating chamber and refrigerating chamber improve the freezer of the efficiency of kind of refrigeration cycle respectively.This is cooling by carrying out with the evaporating temperature higher than refrigerating chamber when the higher refrigerating chamber of cooling air temperature, improves the efficiency of kind of refrigeration cycle.
In addition, propose to have use to be arranged at respectively the air door that blocks cold air of refrigerating chamber and refrigerating chamber, when compressor stops, utilizing evaporimeter cold and hot of low temperature, carry out the scheme (for example,, with reference to patent documentation 1) of refrigerated compartment.This is by the white heat of sublimation or the heat of fusion that are attached to evaporimeter are recycled, and the heater power while cutting down defrosting makes the running rate of the cooling required kind of refrigeration cycle of refrigerating chamber reduce simultaneously, realizes energy-saving.
Below, with reference to the accompanying drawings of existing freezer.
Fig. 5 is the longitudinal section of existing freezer, and Fig. 6 is the refrigeration cycle structure figure of existing freezer, and Fig. 7 is the positive schematic diagram of existing freezer, and Fig. 8 means the state transition of cooling control and the figure of switching condition thereof of existing freezer.
In Fig. 5~7, freezer 11 has housing 12, door 13, the pin 14 of support housing 12, be arranged at the Machine Room, bottom 15 of the bottom of housing 12, be disposed at housing 12 top refrigerating chamber 17 and be disposed at the refrigerating chamber 18 of the bottom of housing 12.In addition, in freezer 11, as the parts that form kind of refrigeration cycle, have be accommodated in Machine Room, bottom 15 compressor 56, be accommodated in refrigerating chamber 18 rear side evaporimeter 20 and be accommodated in the main condenser 21 in Machine Room, bottom 15.In addition, freezer 11 have separate Machine Room, bottom 15 partition wall 22, be installed on partition wall 22 main condenser 21 is carried out air cooled fan 23, is arranged at the evaporating pan 57 on top and the base plate 25 of Machine Room, bottom 15 of compressor 56.
In addition, freezer 11 have be arranged at base plate 25 a plurality of air entries 26, be arranged at the outlet 27 and the communication air duct 28 that the top of the outlet of Machine Room, bottom 15 27 and housing 12 is connected of the rear side of Machine Room, bottom 15.Here, Machine Room, bottom 15 is divided into Room 2 by partition wall 22, at the weather side of fan 23, takes in main condenser 21, at downwind side, takes in compressor 56 and evaporating pan 57.
In addition, in freezer 11, as the parts that form kind of refrigeration cycle, have and be positioned at the downstream of main condenser 21, the dew eliminating tube 37 of being combined with the outer surface heat of the housing 12 of the peristome periphery of refrigerating chamber 18; Be positioned at dew eliminating tube 37 downstream, to circulation cold-producing medium carry out dry drier 38; With the throttling element 39 that links drier 38 and evaporimeter 20, the cold-producing medium of circulation is reduced pressure.
In addition, freezer 11 has the cool-air feed being produced by evaporimeter 20 to the evaporator fan 50 of refrigerating chamber 17 and refrigerating chamber 18, blocks the refrigerating chamber air door 51 of the cold air that is supplied to refrigerating chamber 18 and block the refrigerating chamber air door 52 of the cold air that is supplied to refrigerating chamber 17.And freezer 11 has the DEF temperature sensor 58 to the temperature of the PCC temperature sensor 55 of the temperature of the pipeline of refrigerating chamber 17 cool-air feeds (duct) 53, the FCC temperature sensor 54 that detects the temperature of refrigerating chamber 18, detection refrigerating chamber 17 and detection evaporimeter 20.
Below, the action of the existing freezer forming is in the above-described manner described.
Fig. 8 conditional M1~M11 means that the pattern in the cooling control of existing freezer switches.
From the cooling halted state (below this action being called to " stopping (OFF) pattern ") that fan 23, compressor 56, evaporator fan 50 are together stopped.In " stop mode ", the detected temperatures of FCC temperature sensor 54 rises to the PCC_ON temperature that the FCC_ON temperature of setting or the detected temperatures of PCC temperature sensor 55 rise to setting (that is, satisfy condition M1).Now, close refrigerating chamber air door 51, open refrigerating chamber air door 52, drive compression machine 56 and fan 23, evaporator fan 50 (below this action being called to " PC refrigerating mode ").
In " PC refrigerating mode ", by the driving of fan 23, main condenser 21 sides that are separated the Machine Room, bottom 15 of wall 22 separations form negative pressure, from a plurality of air entries 26, attract outside air, compressor 56 and evaporating pan 57 sides form malleation, and the air in Machine Room, bottom 15 is discharged to outside from a plurality of outlets 27.
On the other hand, the cold-producing medium of discharging from compressor 56 carries out heat exchange at main condenser 21 and extraneous air, and after residual a part of condensation of gas, to dew eliminating tube 37, supplies with.By the cold-producing medium after dew eliminating tube 37, the peristome of refrigerating chamber 18 is warmed, and via housing 12 to external cooling and condensation.By the liquid refrigerant after dew eliminating tube 37, at drier 38, be removed moisture, by throttling element 39, reduced pressure, evaporimeter 20 evaporation and with the case of refrigerating chamber 17 in air carry out heat exchange and refrigerated compartment 17, and be back to compressor 56 as gas refrigerant.
In " PC refrigerating mode ", the detected temperatures of FCC temperature sensor 54 declines and rises to PCC_OFF temperature that the FCC_OFF temperature of setting and the detected temperatures of PCC temperature sensor 55 drop to setting (, M2 satisfies condition) time, migrate to " stop mode ".
In addition, in " PC refrigerating mode ", the detected temperatures of FCC temperature sensor 54 is shown as the PCC_OFF temperature (that is, satisfy condition M5) that drops to setting higher than the temperature of the FCC_OFF temperature of setting and the detected temperatures of PCC temperature sensor 55.Now, open refrigerating chamber air door 51, closing cold room air door 52, drive compression machine 56 and fan 23, evaporator fan 50.Below, by turning round with the cooling kind of refrigeration cycle that makes equally of PC, air in the case of refrigerating chamber 18 and evaporimeter 20 are carried out to heat exchange, cooling refrigerating chamber 18 (following, this action to be called to " FC refrigerating mode ").
In " FC refrigerating mode ", the detected temperatures of FCC temperature sensor 54 drops to the FCC_OFF temperature of setting and the detected temperatures of PCC temperature sensor 55 shows that the PCC_ON temperature of setting is above (, M6 satisfies condition) time, migrate to PC refrigerating mode.
In addition, in " FC refrigerating mode ", when the detected temperatures of FCC temperature sensor 54 drops to the FCC_OFF temperature of setting and the detected temperatures of PCC temperature sensor 55 and shows the temperature (that is, M4 satisfies condition) lower than the PCC_ON temperature of setting, migrate to stop mode.
Then, illustrate and utilize the white cooling action that is attached to evaporimeter 20.
Be arranged at evaporimeter 20 near Defrost heater (not shown) in energising, and stop compressor 56, close refrigerating chamber air door 51, open refrigerating chamber air door 52, drive evaporator fan 50 (below this action being called to " defrosting mode "), melt thus and remove the frost that is attached to evaporimeter 20, and utilize the white heat of sublimation or the heat of fusion being removed gradually, refrigerated compartment 17.
In addition, be arranged at evaporimeter 20 near Defrost heater (not shown) in no power, stop compressor 56, close refrigerating chamber air door 51, open refrigerating chamber air door 52, drive evaporator fan 50 (following, this action is called to " stopping circulating cooling pattern "), thus, utilize evaporimeter 20 and be attached to the sensible heat of white low temperature of evaporimeter 20 and the white heat of sublimation or heat of fusion, refrigerated compartment 17.Now, the frost that is attached to evaporimeter 20 does not completely melt and removes, by the frost that is attached to evaporimeter 20 is recycled, and the electric power of the heater in the time of can cutting down " defrosting mode " (not shown) refrigerated compartment 17.
In " FC refrigerating mode ", while dropping into power supply, or when from last time, defrosting finishes through stipulated time Tx2 (, M7 satisfies condition) time, for refrigerating chamber 18 is cooled to lower than common temperature, make the cooling lasting stipulated time of FC (following, this action to be called to " pre-cooled pattern ").Then, from pre-cooled, while starting through stipulated time Tx3 (that is, M8 satisfies condition), migrating to defrosting action.In addition, in defrosting, when the detected temperatures that is installed on the DEF temperature sensor 58 of evaporimeter 20 shows higher than the temperature of the DEF_OFF temperature of setting or starts through stipulated time Tx4 (that is, M9 satisfies condition) from defrosting, migrate to " stopping circulating cooling pattern ".
In addition, in " stop mode ", while starting through stipulated time Tm (that is, M10 satisfies condition) from OFF, migrate to " stopping circulating cooling pattern ".
In " stopping circulating cooling pattern ", hydronic while starting through stipulated time Td (that is, M11 satisfies condition) from stopping, migrating to " stop mode ".
Here, the cooling action in overload condition is described.
In existing freezer, for switch the PC FC cooling and independent cooling refrigerating chamber 18 of independent refrigerated compartment 17 cooling carry out cooling control, during the excessive load such as food materials of putting into high temperature in occurring in refrigerating chamber 17 or refrigerating chamber 18, likely the side in refrigerating chamber 17 or refrigerating chamber 18 does not have cooling for a long time.
So, following situation is described: as condition M5 institute mark, in " PC refrigerating mode ", the detected temperatures of FCC temperature sensor 54 surpasses the situation of the FCC_ON temperature of setting, or as condition M6 institute mark, in " FC refrigerating mode ", the detected temperatures of PCC temperature sensor 55 surpasses the situation of the PCC_ON temperature of setting.Now, until during the FCC_OFF temperature of the detected temperatures of the PCC temperature sensor 55 arrival PCC_OFF temperature of setting or the detected temperatures of FCC temperature sensor 54 arrival setting, alternate repetition carries out that the PC of stipulated time Txr is cooling and FC stipulated time Txf is cooling (following, this action to be called to " alternately cooling ").Thus, can avoid refrigerating chamber 17 or refrigerating chamber 18 in a side there is no for a long time cooling state.
By the action illustrating as mentioned above, by the temperature of the evaporimeter 20 of " PC refrigerating mode " being kept than " FC refrigerating mode " height, can improve the efficiency of kind of refrigeration cycle.And, by utilizing " stopping circulating cooling pattern " to be attached to the white latent heat of fusion recycling of evaporimeter 20, can cut down the heater power (not shown) in when defrosting and reduce the running rate of the cooling required kind of refrigeration cycle of refrigerating chamber 17, can realize energy-saving thus.
But, in the structure of existing freezer, be not subject to freezer arrange environment, operating condition affect flow system cryogen in dew eliminating tube 37 always, so cause the thermic load of invading refrigerating chambers 18 from dew eliminating tube 37, become the reason that the power consumption amount of freezer increases.
In addition, dew eliminating tube 37 pressure losses that form with long thin diameter tube are large, particularly become the main cause that in the overload condition that circulating mass of refrigerant increases, condensation temperature rises, and become the reason that the power consumption amount of freezer increases.
Therefore, problem be to suppress according to freezer environment is set, operating condition is different and the pressure loss, the thermic load that cause because of dew eliminating tube.
Look-ahead technique document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 9-236369 communique
Summary of the invention
Freezer of the present invention is connected with a plurality of dew eliminating tubes in the downstream of main condenser via flow channel switching valve (parallel connection) arranged side by side.
Thus, particularly when the large excess load of circulating mass of refrigerant, use side by side a plurality of dew eliminating tubes simultaneously, can suppress the pressure loss that dew eliminating tube causes.During excess load, refer to when the temperature, the humidity that are for example assumed to air externally frequently carry out opening and closing higher summer, while taking in the high food of temperature.Now, the running rate of kind of refrigeration cycle increases, and circulating mass of refrigerant increases, and need to prevent from being equipped with the dewfall of surrounding of the freezer housing of dew eliminating tube.Now, by use side by side dew eliminating tube to reduce the circulating mass of refrigerant of each root simultaneously, can suppress the pressure loss that dew eliminating tube causes.
Accompanying drawing explanation
Fig. 1 is the longitudinal section of the freezer of the 1st embodiment of the present invention.
Fig. 2 is the loop structure figure of the freezer of the 1st embodiment of the present invention.
Fig. 3 is the schematic diagram at the back side of the freezer of the 1st embodiment of the present invention.
Fig. 4 means the state transition of cooling control and the figure of switching condition thereof of the freezer of the 1st embodiment of the present invention.
Fig. 5 is the longitudinal section of existing freezer.
Fig. 6 is the loop structure figure of existing freezer.
Fig. 7 is the positive schematic diagram of existing freezer.
Fig. 8 means the state transition of cooling control and the figure of switching condition thereof of existing freezer.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are just described, for the structure identical with conventional example, use same-sign, description is omitted.In addition, the present invention is not limited to this embodiment.
(the 1st embodiment)
Fig. 1 is the longitudinal section of the freezer of the 1st embodiment of the present invention, Fig. 2 is the loop structure figure of the freezer of the 1st embodiment of the present invention, Fig. 3 is the schematic diagram at the back side of the freezer of the 1st embodiment of the present invention, and Fig. 4 means the state transition of cooling control and the figure of switching condition thereof of the freezer of the 1st embodiment of the present invention.
In Fig. 1~3, freezer 11 has: housing 12, door 13, the pin 14 of support housing 12, be arranged at the bottom of housing 12 Machine Room, bottom 15, be arranged at the top of housing 12 Machine Room, top 16, be disposed at housing 12 top refrigerating chamber 17 and be disposed at the refrigerating chamber 18 of the bottom of housing 12.In addition, in freezer 11, as the parts that form kind of refrigeration cycle, have be accommodated in Machine Room, top 16 compressor 19, be accommodated in refrigerating chamber 18 rear side evaporimeter 20 and be accommodated in the main condenser 21 in Machine Room, bottom 15.In addition, freezer 11 have separate Machine Room, bottom 15 partition wall 22, to being installed on the main condenser 21 of partition wall 22, carry out air cooled fan 23, be arranged at the evaporating pan 24 of downwind side and the base plate 25 of Machine Room, bottom 15 of partition wall 22.
Here, compressor 19 is speed changeable compressor, uses the rotating speed in 6 stages that are selected from 20~80rps.This is the resonance for fear of pipe arrangement etc., and the rotating speed of compressor 19 is switched to adjust refrigerating capacity in 6 stages of low speed~high speed.Compressor 19 when starting with low-speed running, for the duration of runs of refrigerated compartment 17 or refrigerating chamber 18 elongated, thereby speedup.This is the low speed that uses peak efficiency due to main, and increases for the refrigerating chamber 17 causing due to high outside air temperature, door switching etc. or the load of refrigerating chamber 18, uses the cause of suitable higher rotating speed.Now, control independently mutually the rotating speed of compressor 19 with the cooling operation mode of freezer 11, but also can evaporating temperature is high, the speed setting during startup of " PC refrigerating mode " that refrigerating capacity is larger is lower than " FC refrigerating mode ".In addition, also can reduce along with the temperature of refrigerating chamber 17 or refrigerating chamber 18, compressor 19 is slowed down and adjust refrigerating capacity.
In addition, freezer 11 has and is arranged at a plurality of air entries 26 of base plate 25, the outlet 27 of rear side that is arranged at Machine Room, bottom 15 and the communication air duct 28 that the outlet of Machine Room, bottom 15 27 and Machine Room, top 16 linked.Here, Machine Room, bottom 15 is divided into Room 2 by partition wall 22, at the weather side of fan 23, takes in main condenser 21, at downwind side, takes in evaporating pan 24.
In addition, in freezer 11, as the parts that form kind of refrigeration cycle, have and be positioned at the downstream of main condenser 21, the 1st dew eliminating tube 44 of being combined with the outer surface heat of the housing 12 of the peristome periphery of refrigerating chamber 18; Be positioned at the 1st dew eliminating tube 44 downstream, to circulation cold-producing medium carry out dry drier 38; With the throttling element 39 that links drier 38 and evaporimeter 20, the cold-producing medium of circulation is reduced pressure.
Here, in order to make the refrigerant flow path branch of the 1st dew eliminating tube 44, there is flow channel switching valve 40, the 2nd dew eliminating tube 41 and junction of two streams 42.The 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 link flow channel switching valve 40 and junction of two streams 42 side by side, and flow channel switching valve 40 can open and close controlling the 1st dew eliminating tube 44 and the flowing of the 2nd dew eliminating tube 41 independent cold-producing medium separately.In addition, the 2nd dew eliminating tube 41 has and the 1st dew eliminating tube 44 equal internal volume and heat-sinking capability roughly, contact and dispel the heat with the back side of housing 12, and by with vacuum heat insulation material 43 repeated configuration, suppress the heat transfer to housing 12 inside.
In addition, freezer 11 has the cool-air feed being produced by evaporimeter 20 to the evaporator fan 30 of refrigerating chamber 17 and refrigerating chamber 18, blocks the refrigerating chamber air door 31 of the cold air that is supplied to refrigerating chamber 18 and block the refrigerating chamber air door 32 of the cold air that is supplied to refrigerating chamber 17.In addition, freezer 11 has the DEF temperature sensor 36 to the temperature of the PCC temperature sensor 35 of the temperature of the pipeline 33 of refrigerating chamber 17 cool-air feeds, the FCC temperature sensor 34 that detects the temperature of refrigerating chamber 18, detection refrigerating chamber 17 and detection evaporimeter 20.Here, pipeline 33 forms along the wall of refrigerating chamber 17 and Machine Room, top 16 adjacency, a part for cold air by pipeline 33 is discharged near the central authorities of refrigerating chamber, and, the wall of Machine Room, the cooling top of major part 16 adjacency of cold air and by after from the top of refrigerating chamber 17, discharge.
Below, the action of the freezer of the 1st embodiment of the present invention forming is in the above-described manner described.
In Fig. 4, condition L1~L15 represents that the pattern of cooling control of the freezer of the 1st embodiment of the present invention switches.Here, for cooling operation mode and the pattern switching condition identical with existing freezer, detailed.
" stopping circulating cooling pattern " first, is described.
In " stop mode ", when the L10 that satisfies condition (that is, condition M10), migrate to " stopping circulating cooling pattern ".
Then, in " stopping circulating cooling pattern ", when the detected temperatures of the L1 that satisfies condition (that is, condition M1) or DEF temperature sensor 36 rises to the OSR_OFF temperature (that is, L11 satisfies condition) of setting, migrate to " stop mode ".
Thus, can use the DEF temperature sensor 36 that is arranged at evaporimeter 20, suitably adjust the time of " stopping circulating cooling pattern ".There is following possibility in existing freezer: in order always to carry out the circulating cooling that stops of certain time interval T d, more than the temperature of evaporimeter 20 rises to the temperature needing, to approaching refrigerating chamber 18, conducts heat, thereby increase thermic load.As the OSR_OFF temperature that finishes the fiducial temperature of " stopping circulating cooling pattern ", be preferably set to-15~-5 ℃ of degree.Can not fully obtain stopping hydronic effect lower than-15 ℃, surpass-5 ℃ of possibilities that have the thermic load that increases refrigerating chamber 18.
Then, the cooling action in usual conditions is described.
In " PC refrigerating mode ", the detected temperatures of FCC temperature sensor 34 shows the temperature higher than the FCC_OFF temperature of setting, and when the detected temperatures of PCC temperature sensor 35 drops to the PCC_OFF temperature (that is, L5 satisfies condition) of setting, migrate to FC refrigerating mode.In addition, as condition L5 institute mark, in PC refrigerating mode, after stipulated time Tx1, the difference of the FCC_OFF temperature of the detected temperatures of FCC temperature sensor 34 and setting is that the difference of the detected temperatures of PCC temperature sensor 35 and the PCC_OFF temperature of setting is equal when above, migrates to " FC refrigerating mode ".
In " FC refrigerating mode ", the cold-producing medium of discharging from compressor 19 carries out heat exchange and residual a part of gas and after condensation, via flow channel switching valve 40, to the 1st dew eliminating tube 44 or the 2nd dew eliminating tube 41, supplies with at main condenser 21 and extraneous air.Now, control the one party alternative supply cold-producing medium in 40 pairs of the 1st dew eliminating tubes 44 of flow channel switching valve and the 2nd dew eliminating tube 41.Consequently, can reduce the thermic load amount of invading refrigerating chamber 18 from the 1st dew eliminating tube 44 via the peristome of refrigerating chamber 18.
Afterwards, by the liquid refrigerant after junction of two streams 42 and prior art, similarly at drier 38, remove moisture, by throttling element 39, reduced pressure, in evaporimeter 20 evaporations, and with the case of refrigerating chamber 17 in air carry out heat exchange, refrigerated compartment 17, and be back to compressor 19 as gas refrigerant.
In addition, the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 have roughly equal internal volume and heat-sinking capability, so the heat dissipation capacity under the maintenance dose of the liquid refrigerant under not use state and use state is equal, can follows and switch and the not large ground efficiency that changes of the state of cooling is carried out cooling well.
In " FC refrigerating mode ", the detected temperatures of FCC temperature sensor 34 drops to the FCC_OFF temperature of setting and the detected temperatures of PCC temperature sensor 35 shows that the PCC_ON temperature of setting is above (, L6 satisfies condition) time, migrate to " PC refrigerating mode ".In addition, as condition L6 institute mark, in " FC refrigerating mode ", after stipulated time Tx1, it is equal when following that the difference of the FCC_OFF temperature of the detected temperatures of FCC temperature sensor 34 and setting reaches the difference of the detected temperatures of PCC temperature sensor 35 and the PCC_OFF temperature of setting, migrates to " PC refrigerating mode ".
In " PC refrigerating mode ", the cold-producing medium of discharging from compressor 19 carries out heat exchange residual a part of gas and after condensation, via flow channel switching valve 40, to the 1st dew eliminating tube 44 or the 2nd dew eliminating tube 41, supplies with at main condenser 21 and extraneous air.Now, control the one party alternative supply cold-producing medium in 40 pairs of the 1st dew eliminating tubes 44 of flow channel switching valve and the 2nd dew eliminating tube 41.Consequently, can reduce the thermic load amount of invading refrigerating chamber 18 from the 1st dew eliminating tube 44 via the peristome of refrigerating chamber 18.
Afterwards, by the liquid refrigerant after junction of two streams 42 and prior art, similarly at drier 38, remove moisture, by throttling element 39, reduced pressure, in evaporimeter 20 evaporations, and with the case of refrigerating chamber 17 in air carry out heat exchange, refrigerated compartment 17, and be back to compressor 19 as gas refrigerant.
In addition, the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 have roughly equal internal volume and heat-sinking capability, so the heat dissipation capacity under the maintenance dose of the liquid refrigerant under not use state and use state is equal, can follows and switch and the not large ground efficiency that changes of the state of cooling is carried out cooling well.In addition, in " PC refrigerating mode ", cold air does not flow in refrigerating chamber 18, and the temperature in refrigerating chamber 18 is relatively higher than in " FC refrigerating mode ", so the usage rate of the 1st dew eliminating tube 44 can be suppressed than low in " FC refrigerating mode ".
Then, the cooling action in overload condition is described.
By the control of usual conditions as mentioned above, in overload condition when refrigerating chamber 17 and refrigerating chamber 18 together form the input power supply of high temperature etc., can per stipulated time Tx1 alternately switch the large side that deviates from of " PC refrigerating mode " and " FC refrigerating mode " and the preferential cooling OFF temperature with as the cooling benchmark of end.Its result, with the time of implementing in existing freezer fixing replace cooling comparing, can distribute more neatly the cooling duration of runs.
But, even in the cooling duration of runs, there is the free degree and carry out alternately cooling, owing to carrying out intermittently the cooling of refrigerating chamber 18, so likely surpass the upper limit of the storage temperature of the frozen food such as ice cream.Therefore, only, in overload condition, add the action (following, this action to be called to " refrigerating mode simultaneously ") of while refrigerated compartment 17 and refrigerating chamber 18.
" refrigerating mode simultaneously " refers to and opens refrigerating chamber air door 31, opens refrigerating chamber air door 32, drive compression machine 19 and fan 23, evaporator fan 30.In " refrigerating mode simultaneously ", by the driving of fan 23, main condenser 21 sides that are separated the Machine Room, bottom 15 of wall 22 separations form negative pressure, from a plurality of air entries 26, attract outside air, compressor 19 and evaporating pan 57 sides form malleation, and the air in Machine Room, bottom 15 is discharged to outside from a plurality of outlets 27.
On the other hand, the cold-producing medium of discharging from compressor 19 carries out heat exchange residual a part of gas and after condensation, via flow channel switching valve 40, to the 1st dew eliminating tube 44 or the 2nd dew eliminating tube 41, supplies with at main condenser 21 and extraneous air.Now, control flow channel switching valve 40, to the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 both sides' while the supply system cryogens.Its result, by reducing the circulating mass of refrigerant of every 1, can suppress the pressure loss that the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 cause.
Afterwards, by the liquid refrigerant after junction of two streams 42, similarly at drier 38, remove moisture with prior art, by throttling element 39, reduced pressure, in evaporimeter 20 evaporations, and with the case of refrigerating chamber 17 and refrigerating chamber 18 in air carry out heat exchange, refrigerated compartment 17 and refrigerating chamber 18, and be back to compressor 19 as gas refrigerant.
Now, make evaporator fan 30 High Rotation Speeds, guarantee for parallel refrigerated compartment 17 and the required air quantity of refrigerating chamber 18.Its result, compares with " FC refrigerating mode ", and the air that forms high temperature and high wind speed flow into evaporimeter 20, thus, there is ascendant trend in the blow out air temperature of evaporimeter 20, so preferably with relatively high rotation speed operation compressor 19, guarantee suitable refrigerating capacity." refrigerating mode " simultaneously if in low-speed running compressor 19, likely the blow out air temperature of evaporimeter 20 rises and refrigerating chamber 18 can not be cooled to low temperature.
Therefore, in " PC refrigerating mode ", the rotating speed of compressor 19 is above (for stipulating rotating speed, L12 satisfies condition) time, migrate to " refrigerating mode simultaneously ", and in " refrigerating mode simultaneously ", the rotating speed of compressor 19 lower than regulation rotating speed (, L13 satisfies condition) time, migrate to " PC refrigerating mode ".In addition, the switching of the pattern of condition L12 and condition L13 is preferentially carried out than other state transition.This be because, rotating speed speedup by compressor 19 is to more than stipulating rotating speed, detect freezer 11 for overload condition, migrate to " refrigerating mode " simultaneously, and the rotating speed of avoiding compressor 19 during lower than regulation rotating speed the blow out air temperature of evaporimeter 20 rise and refrigerating chamber 18 can not be cooled to low temperature.
In addition, in " refrigerating mode simultaneously ", the PCC_OFF temperature detected temperatures following or FCC temperature sensor 34 after stipulated time Tx5 that the detected temperatures of PCC temperature sensor 35 is reduced to setting shows higher than the FCC_LIM temperature of the setting of FCC_ON temperature above (, L14 satisfies condition) time, migrate to " FC refrigerating mode ".This is owing to rising in order to suppress the temperature of non-cooling refrigerating chamber 17 in " FC refrigerating mode ", until the temperature upper limit that refrigerating chamber 18 allows continues the cause of refrigerating mode simultaneously.Therefore, the FCC_ON temperature that the detection FCC_LIM temperature of FCC temperature sensor 34 is compared to conventionally the ceiling temperature in cooling is high 2~5 ℃, is preferably and is equivalent to weak cold setting.
In addition, in present embodiment, with the rotating speed of compressor 19, limit the condition L12 that migrates to " refrigerating mode simultaneously " corresponding to overload condition, but also can detect while dropping into power supply under high outside air temperature or frequently door open and close etc., migrate to " refrigerating mode simultaneously ".Do not need, until compressor 19 speedups need only clear and definite freezer 11 in overload condition, can earlier migrate to " refrigerating mode simultaneously ".In addition, now, also can change condition L13, make the temperature that detects refrigerating chamber 17, refrigerating chamber 18 reduce to a certain degree to remove refrigerating mode simultaneously.Thus, same with present embodiment, can the highest PC refrigerating mode of longer time service efficiency.
Defrosting when " refrigerating mode simultaneously " middle evaporimeter 20 frosting then, is described.
In " refrigerating mode ", in the moment in the detected temperatures of FCC temperature sensor 34 lower than FCC_LIM temperature, reduce the aperture of refrigerating chamber air door 31 simultaneously.This is in order to reach the cooling of preferential refrigerating chamber 17 of the moment that weak cold water is flat at refrigerating chamber 18, to suppress the allocation of the amount of air amount to refrigerating chamber 18.Then, from starting after stipulated time Tx6 of " refrigerating mode simultaneously ", when the detected temperatures of PCC temperature sensor 35 surpasses PCC_OFF temperature (that is, L15 satisfies condition), migrate to defrosting mode.
This be at " refrigerating mode " simultaneously thus in evaporimeter 20 frosting refrigerating chambers 17 while there is slow cooling trend, the common defrosting that quickening is carried out every stipulated time Tx2 is implemented, and can recover in advance by shortening the defrost interval of evaporimeter 20 cooling capacity of refrigerating chamber 17.In " refrigerating mode simultaneously ", make evaporator fan 30 High Rotation Speeds, guarantee the parallel air quantity of sending to the both sides of refrigerating chamber 17 and refrigerating chamber 18, but when a large amount of frostings occurs evaporimeter 20, can not guarantee sufficient air quantity.Now, compare with the refrigerating chamber 18 that front at evaporimeter 20 forms, from the air quantity of the longer refrigerating chamber 17 in the path of evaporimeter 20 air-supplies, decline to a great extent.Therefore, in order to reach the cooling of preferential refrigerating chamber 17 of the moment that weak cold water is flat at refrigerating chamber 18, inhibition is to the allocation of the amount of air amount of refrigerating chamber 18, and, in the cooling inadequate moment that is judged as refrigerating chamber 17 after stipulated time Tx6, by shortening the defrost interval of evaporimeter 20, can recover in advance the cooling capacity of refrigerating chamber 17.
As mentioned above, freezer of the present invention also only has " refrigerating mode simultaneously " on the basis of " FC refrigerating mode " and " PC refrigerating mode " under overload condition, wherein, in the downstream of main condenser 21, via flow channel switching valve 40, connect side by side the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 and select arbitrarily.Thus, when conventionally turning round, alternately switch and use the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 arbitrarily, can suppress the thermic load that the 1st dew eliminating tube 44 causes, and walk abreast simultaneously and use the 1st dew eliminating tube 44 and the 2nd dew eliminating tube 41 when overload operation, can reduce circulating mass of refrigerant, suppress the pressure loss.
In addition, in the freezer of present embodiment, do not implement to close completely the action of flow channel switching valve 40, if but close flow channel switching valve 40 completely in " stop mode ", do not make liquid refrigerant in main condenser 21 side flow downstream, can suppress to flow in " stop mode " amount of the liquid refrigerant of the high temperature in evaporimeter 20, can reduce the thermic load amount of freezer.
As mentioned above, the present invention includes the kind of refrigeration cycle at least with compressor, evaporimeter, condenser, condenser have force cooling air mode main condenser, be connected in main condenser downstream flow channel switching valve and be connected in the secondary condenser in the downstream of flow channel switching valve, secondary condenser comprises a plurality of dew eliminating tubes of connection arranged side by side in structure.Kind of refrigeration cycle, when turning round with usual conditions, makes cold-producing medium alternating current cross a plurality of dew eliminating tubes, and when turning round with overload condition, makes cold-producing medium parallel flow cross a plurality of dew eliminating tubes.
Thus, can conventionally time, be suppressed at the thermic load that dew eliminating tube causes, and simultaneously parallelly when the large excess load of circulating mass of refrigerant use a plurality of dew eliminating tubes, suppress the pressure loss that dew eliminating tube causes.During excess load, refer to when the temperature, the humidity that are for example assumed to air externally frequently carry out opening and closing higher summer, while taking in the high food of temperature.Now, the running rate of kind of refrigeration cycle increases, and circulating mass of refrigerant increases, and need to prevent from being equipped with the dewfall of surrounding of the freezer housing of dew eliminating tube.Now, by use side by side dew eliminating tube to reduce the circulating mass of refrigerant of each root simultaneously, can suppress the pressure loss that dew eliminating tube causes.
In addition, the present invention includes refrigerating chamber and refrigerating chamber, using refrigerating chamber and refrigerating chamber all higher than the situation of set point of temperature as overload condition, make cold-producing medium parallel flow cross a plurality of dew eliminating tubes.
Thus, situation about turning round during in the situation of usual conditions running with in overload condition, minute situation is carried out, and by meeting each condition, turns round, and can realize energy-saving.In addition, on the basis when grasping reliably the large excess load of circulating mass of refrigerant, can also walk abreast and suppress with a plurality of dew eliminating tubes the pressure loss that dew eliminating tube causes simultaneously, and the temperature that can suppress refrigerating chamber and refrigerating chamber rises.
In addition, the present invention includes refrigerating chamber, refrigerating chamber, kind of refrigeration cycle, as the evaporimeter of the inscape of kind of refrigeration cycle, the evaporator fan that the cold air being produced by evaporimeter is supplied with to refrigerating chamber and refrigerating chamber, block the refrigerating chamber air door of the cold air of supplying with from evaporimeter to refrigerating chamber and block the refrigerating chamber air door of the cold air of supplying with from evaporimeter to refrigerating chamber.The PCC temperature sensor also with the FCC temperature sensor of the temperature that detects refrigerating chamber and the temperature of detection refrigerating chamber.And, have: FC refrigerating mode, open refrigerating chamber air door, closing cold room air door, turns round kind of refrigeration cycle and supplies with the cold air being produced by evaporimeter, thus cooling refrigerating chamber; With PC refrigerating mode, close refrigerating chamber air door, open refrigerating chamber air door, kind of refrigeration cycle is turned round and supply with the cold air being produced by evaporimeter, thus refrigerated compartment.
And, have: while refrigerating mode, open refrigerating chamber air door, open refrigerating chamber air door, kind of refrigeration cycle is turned round and supply with the cold air being produced by evaporimeter, thus cooling refrigerating chamber of while and refrigerating chamber; With stop circulating cooling pattern, close refrigerating chamber air door, open refrigerating chamber air door, stop kind of refrigeration cycle and the evaporator fan that turns round, make thus the air in evaporimeter and refrigerating chamber carry out heat exchange.Under usual conditions, combine FC refrigerating mode and PC refrigerating mode, stop circulating cooling pattern carry out cooling, and under overload condition combination simultaneously refrigerating mode and FC refrigerating mode carry out cooling.
Thus, maintain as far as possible high efficiency PC refrigerating mode under usual conditions, and continue the cooling of refrigerating chamber under overload condition, and can automatically suitably adjust the amount of cooling water of refrigerating chamber and refrigerating chamber, the temperature that can suppress refrigerating chamber and refrigerating chamber rises.
In addition, in the present invention, compressor is speed changeable compressor, when common running, make compressor with lower than regulation rotation speed operation and combine FC refrigerating mode and PC refrigerating mode, stop circulating cooling pattern and carry out coolingly, and under overload condition, make compressor more than regulation rotating speed turn round and to combine while refrigerating mode and FC refrigerating mode carries out cooling.
Thus, the temperature that can suppress the evaporimeter under refrigerating mode simultaneously rises, and cooling capacity that can freezing-inhibiting chamber is not enough.
In addition, the present invention includes Machine Room, top and Machine Room, bottom, at Machine Room, top configuration compressor, and at Machine Room, bottom configuration flow channel switching valve.
Thus, by suppressing the connecting pipings of flow channel switching valve and the resonance of compressor, can reduce the noise of freezer.
In industry, utilize possibility
As mentioned above, freezer involved in the present invention, by the downstream at main condenser, via flow channel switching valve, connect side by side a plurality of dew eliminating tubes, can at random adjust the pressure loss, the thermic load that inhibition dew eliminating tube causes according to arrange environment, the operating condition of freezer, so, also can be applicable to other the freezing and refrigeration application commodity such as freezer for business.
Reference numeral explanation
11 freezers
12 housings
15 Machine Room, bottoms
16 Machine Room, tops
19 compressors
20 evaporimeters
24 evaporating pans
30 evaporator fans
31 refrigerating chamber air doors
32 refrigerating chamber air doors
33 pipelines
34 FCC temperature sensors
35 PCC temperature sensors
36 DEF temperature sensors
37 dew eliminating tubes
38 driers
39 throttling elements
40 flow channel switching valves
41 the 2nd dew eliminating tubes (secondary condenser)
42 junctions of two streams
43 vacuum heat insulation materials
44 the 1st dew eliminating tubes (secondary condenser)
50 evaporator fans
51 refrigerating chamber air doors
52 refrigerating chamber air doors
53 pipelines
54 FCC temperature sensors
55 PCC temperature sensors
56 compressors
57 evaporating pans
58 DEF temperature sensors

Claims (5)

1. a freezer, is characterized in that:
Comprise the kind of refrigeration cycle at least with compressor, evaporimeter, condenser,
Described condenser have force cooling air mode main condenser, be connected in described main condenser downstream flow channel switching valve and be connected in the secondary condenser in the downstream of described flow channel switching valve, described secondary condenser comprises a plurality of dew eliminating tubes of connection arranged side by side in structure
Described kind of refrigeration cycle, when turning round with usual conditions, makes cold-producing medium alternating current cross a plurality of described dew eliminating tubes, and when turning round with overload condition, makes cold-producing medium parallel flow cross a plurality of described dew eliminating tubes.
2. freezer as claimed in claim 1, is characterized in that:
Comprise refrigerating chamber and refrigerating chamber, using described refrigerating chamber and described refrigerating chamber all higher than the situation of set point of temperature as overload condition, make cold-producing medium parallel flow cross a plurality of described dew eliminating tubes.
3. freezer as claimed in claim 1, is characterized in that:
The FCC temperature sensor of the temperature that comprise refrigerating chamber, refrigerating chamber, described kind of refrigeration cycle, evaporator fan, the refrigerating chamber air door that blocks the cold air of supplying with to described refrigerating chamber from described evaporimeter, the refrigerating chamber air door that blocks the cold air of supplying with to described refrigerating chamber from described evaporimeter that the cold air being produced by described evaporimeter is supplied with to described refrigerating chamber and described refrigerating chamber, detects described refrigerating chamber and detect the PCC temperature sensor of the temperature of described refrigerating chamber
Described freezer has following pattern:
FC refrigerating mode, opens described refrigerating chamber air door, closes described refrigerating chamber air door, and described kind of refrigeration cycle is turned round and supply with the cold air being produced by described evaporimeter, thus cooling described refrigerating chamber;
PC refrigerating mode, closes described refrigerating chamber air door, opens described refrigerating chamber air door, and described kind of refrigeration cycle is turned round and supply with the cold air being produced by described evaporimeter, thus cooling described refrigerating chamber;
Refrigerating mode, opens described refrigerating chamber air door simultaneously, opens described refrigerating chamber air door, and described kind of refrigeration cycle is turned round and supply with the cold air being produced by described evaporimeter, thus cooling described refrigerating chamber of while and refrigerating chamber; With
Stop circulating cooling pattern, close described refrigerating chamber air door, open described refrigerating chamber air door, stop described kind of refrigeration cycle and the described evaporator fan that turns round, make thus the air in described evaporimeter and described refrigerating chamber carry out heat exchange,
Under usual conditions, combine FC refrigerating mode and PC refrigerating mode, stop circulating cooling pattern carry out cooling, and under overload condition combination simultaneously refrigerating mode and FC refrigerating mode carry out cooling.
4. freezer as claimed in claim 3, is characterized in that:
Described compressor is speed changeable compressor, when common running, make described compressor with lower than regulation rotation speed operation and combine FC refrigerating mode and PC refrigerating mode, stop circulating cooling pattern and carry out coolingly, and under overload condition, make described compressor more than regulation rotating speed turn round and to combine while refrigerating mode and FC refrigerating mode carries out cooling.
5. the freezer as described in any one in claim 1 or 2, is characterized in that:
Comprise Machine Room, top and Machine Room, bottom, in Machine Room, described top, configure described compressor, and configure described flow channel switching valve in Machine Room, described bottom.
CN201380011532.9A 2012-02-29 2013-02-20 Refrigerator Pending CN104160224A (en)

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JP2012042938 2012-02-29
PCT/JP2013/000926 WO2013128845A1 (en) 2012-02-29 2013-02-20 Refrigerator

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