WO2011120293A1 - 风冷冰箱及其控制方法和控制系统 - Google Patents

风冷冰箱及其控制方法和控制系统 Download PDF

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Publication number
WO2011120293A1
WO2011120293A1 PCT/CN2010/077844 CN2010077844W WO2011120293A1 WO 2011120293 A1 WO2011120293 A1 WO 2011120293A1 CN 2010077844 W CN2010077844 W CN 2010077844W WO 2011120293 A1 WO2011120293 A1 WO 2011120293A1
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WO
WIPO (PCT)
Prior art keywords
refrigerating
temperature
evaporator
fan
compartment
Prior art date
Application number
PCT/CN2010/077844
Other languages
English (en)
French (fr)
Inventor
李凌云
任伟
陈潘送
方忠诚
Original Assignee
合肥美的荣事达电冰箱有限公司
合肥华凌股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN 201010138403 external-priority patent/CN101937247B/zh
Priority claimed from CN2010201593478U external-priority patent/CN201662283U/zh
Application filed by 合肥美的荣事达电冰箱有限公司, 合肥华凌股份有限公司 filed Critical 合肥美的荣事达电冰箱有限公司
Priority to AU2010350112A priority Critical patent/AU2010350112B2/en
Priority to EP10848752.1A priority patent/EP2505946B1/en
Publication of WO2011120293A1 publication Critical patent/WO2011120293A1/zh
Priority to US13/472,697 priority patent/US8677771B2/en

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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
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with 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
    • F25D29/00Arrangement or mounting of control or safety devices
    • 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
    • F25B2600/00Control issues
    • F25B2600/11Fan speed control
    • F25B2600/112Fan speed control of evaporator fans
    • 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
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature

Definitions

  • the present invention relates to a control method and control system for an air-cooled water tank and an air-cooled water tank having the same, and more particularly to a method and system for controlling the humidity of a refrigerating compartment of an air-cooled water tank and an air-cooled water tank having the same.
  • Conventional air-cooled frost-free water tanks are usually cooled by a single refrigeration system, that is, only one evaporator and fan placed in the freezer compartment are used to provide cold air to the freezing compartment and the refrigerating compartment, and the cold air enters the cold compartment through the opening and closing of the damper. .
  • an air-cooled frost-free water tank with a double evaporator circulation system in which the refrigerating chamber and the freezing chamber are respectively arranged with evaporators, and the air volume of the refrigerating chamber and the freezing chamber are independently cycled, but since there is no certain treatment means for the evaporator, Moreover, the working condition of the refrigerator of the refrigerating compartment is not optimized. Although the factors such as the odor between the foods are unfavorable to the user, the moisture of the refrigerating compartment is frosted on the evaporator, and then heated and discharged to the tank, and the whole refrigerating compartment The humidity is not guaranteed and the freshness of the food cannot be guaranteed.
  • the present invention aims to solve at least one of the technical problems existing in the prior art.
  • an object of the present invention is to provide a control method and control system for an air-cooled water tank and an air-cooled water tank having the same, and to control the refrigerating chamber flexibly by controlling the refrigerating evaporator and the refrigerating fan reasonably. Humidity, avoiding water loss from food and improving freshness preservation.
  • a method of controlling an air-cooled water tank having a refrigerating chamber, a refrigerating evaporator, and circulating air between the refrigerating evaporator and the refrigerating chamber includes the following steps: detecting the temperature TL in the refrigerating chamber; determining whether the temperature TL is greater than or equal to the first preset temperature ⁇ , and if the temperature TL > T T , starting the refrigerating evaporator for cooling and refrigerating The speed of the fan is adjusted to r 1;
  • the independent refrigerating evaporator and the refrigerating fan are provided for the refrigerating chamber, and the operation of the refrigerating evaporator is controlled according to the temperature in the refrigerating chamber and the temperature of the refrigerating evaporator is rational and flexible according to the temperature of the refrigerating evaporator Adjusting the rotation speed of the refrigerating fan to make the refrigerating room have higher humidity, effectively reducing the moisture loss of the food in the refrigerating room and enhancing the fresh-keeping effect.
  • the control method of the air-cooled water tank according to the embodiment of the present invention, most of the water on the refrigerating evaporator can be brought into the cold
  • the storage compartment relatively reduces the frost on the refrigerating evaporator, thereby prolonging the defrosting cycle of the refrigerating compartment or the number of times the defrosting heating wire is operated, thereby reducing power consumption.
  • first preset temperature 1 ⁇ is the maximum allowable temperature in the refrigerating compartment
  • second preset temperature ⁇ 2 is the minimum allowable temperature in the refrigerating compartment.
  • the refrigerating evaporator is maintained and the speed of the refrigerating fan is maintained ⁇ .
  • adjusting the rotation speed of the refrigerating fan according to the temperature ⁇ _to adjust the humidity in the refrigerating chamber includes gradually decreasing the rotation speed of the refrigerating fan as the temperature rises.
  • adjusting the rotation speed of the refrigerating fan according to the temperature ⁇ _ to adjust the humidity in the refrigerating compartment includes:
  • t 3 is the third preset temperature
  • t 4 is the fourth preset temperature
  • r 4 ⁇ r 3 ⁇ r 2 ⁇ r lo
  • adjusting the rotational speed of the refrigerating fan according to the temperature T Tin to adjust the humidity in the refrigerating compartment includes gradually decreasing the rotational speed of the refrigerating fan as the temperature rises.
  • a control system for an air-cooled water tank having a refrigerating chamber, a refrigerating evaporator, and a refrigerating fan for circulating air between the refrigerating evaporator and the refrigerating chamber
  • the control system comprises: a refrigerating compartment temperature detecting unit, configured to detect a temperature TL in the refrigerating compartment;
  • a refrigerating compartment temperature determining unit configured to determine whether the temperature TL is within a range of T 2 ⁇ TL ⁇ T ⁇ , wherein 1 ⁇ is a first preset temperature, and ⁇ 2 is a second preset temperature;
  • Refrigerated evaporator temperature detecting unit for detecting the temperature of the evaporator ⁇ .
  • control unit configured to start the refrigerating evaporator for cooling at a temperature TL > T ⁇ and adjust the rotational speed of the refrigerating fan to r and stop the refrigerating evaporator operation when TL ⁇ T 2 and adjust the refrigerating according to the temperature T Tin The speed of the fan to adjust the humidity in the refrigerator.
  • the control unit maintains the operation of the refrigerated evaporator at T 2 ⁇ ⁇ ⁇ and maintains the rotational speed of the refrigerating fan ⁇ .
  • control unit gradually reduces the number of revolutions of the refrigerating fan in accordance with the temperature increase.
  • control system may further include an evaporator temperature determination unit for determining the evaporator temperature, wherein the control unit will rotate the refrigerating fan when the evaporator temperature determination unit determines T Benefici ⁇ t 3 Adjust to r 2 , adjust the speed of the refrigerating fan to r 3 when t 3 ⁇ T Structure ⁇ t 4 , and adjust the speed of the refrigerating fan to r 4 when T Formula> t 4 , where t 3 is the third pre- Set the temperature, t 4 is the fourth preset temperature, and r 4 ⁇ r 3 ⁇ r 2 ⁇ r lo
  • an air-cooled water tank having a refrigerating chamber, a refrigerating evaporator, and a refrigerating fan for circulating air between the refrigerating evaporator and the refrigerating chamber, wherein the wind
  • the cold water tank also includes a control system in accordance with an embodiment of the second aspect of the invention.
  • the air-cooled water tank according to the embodiment of the third aspect of the present invention may further include a freezing compartment, a freezing evaporator, and a switching unit, wherein the switching unit is connected to the freezing evaporator through a freezing capillary, and the refrigerating evaporator is switched by the refrigerating capillary
  • the units are connected, and the refrigerating evaporator and the refrigerating capillary are connected in parallel with the freezing capillary, and the control unit controls the switching unit to selectively supply the refrigerant to the refrigerating evaporator to start or stop the refrigerating of the refrigerating chamber.
  • the refrigerating evaporator includes a coil and a plurality of fins extending in a longitudinal direction in a corrugated shape to constitute a plurality of horizontal tubular sections in a longitudinal direction, the plurality of fins being arranged in a lateral direction and respectively connected to the coil Above, at least a portion of the fins each have at least one break point in the longitudinal direction to be discontinuous in the longitudinal direction.
  • each fin has a plurality of break points located between adjacent two transverse pipe sections.
  • each of the fins is provided with a plurality of through holes, wherein the plurality of horizontal pipe segments respectively pass through the plurality of through holes.
  • FIG. 1 is a flow chart showing a method of controlling an air-cooled water tank according to an embodiment of the present invention
  • FIG. 1 is a flow chart showing a method of controlling an air-cooled water tank according to another embodiment of the present invention.
  • FIG. 3 is a block diagram of a control system for an air-cooled water tank according to an embodiment of the present invention
  • Figure 4 is a schematic view of a refrigeration system of an air-cooled water tank according to an embodiment of the present invention.
  • Figure 5 is a schematic structural view of an air-cooled water tank according to an embodiment of the present invention.
  • Figure 6 is a schematic view of a refrigerating evaporator of an air-cooled water tank which is an embodiment of the present invention.
  • Fig. 7 is an enlarged schematic view of ⁇ I in Fig. 6. Detailed ways
  • a water tank according to an embodiment of the present invention includes a casing 1 and a tank door 2, and the casing 1 defines therein a refrigerating chamber 5 at an upper portion and a freezing chamber 7 at a lower portion.
  • a variable greenhouse B may be provided between the refrigerating compartment 5 and the freezing compartment 7.
  • a refrigerating evaporator 3 is disposed behind the refrigerating compartment 5 (on the left side in FIG.
  • variable greenhouse B is also cooled by the cold air generated by the refrigerant evaporator 3, but the present invention is not limited thereto.
  • a freezing evaporator 6 is provided behind the freezing compartment 7.
  • the compressor 9 is installed at the bottom of the tank 1, and the condenser 8 is placed at the right side of the compressor 9 at the bottom of the tank.
  • FIG. 4 a refrigeration system of an air-cooled water tank according to an embodiment of the present invention will be described with reference to FIG.
  • the refrigerating evaporator 3 and the refrigerating evaporator 6 are disposed in a refrigerating system, a compressor 9, a condenser 8, an anti-dew tube 12, a drier filter 11, a solenoid valve 10 as a switching unit, and
  • the freezing evaporators 7 are sequentially connected, wherein the solenoid valve 10 is connected to the freezing evaporator 6 through a freezing capillary 13.
  • solenoid valve 10 is also connected to the refrigerating evaporator 3 through the refrigerating capillary 14, and the refrigerating evaporator 3 and the refrigerating capillary 14 are connected in parallel with the freezing capillary 13. Solenoid valve 10 is used to selectively supply refrigerant The refrigerating evaporator 3 is supplied to selectively control the refrigeration of the refrigerating compartment 5.
  • the water tank, the refrigerating compartment 5 and the freezing compartment 7 according to the embodiment of the present invention are respectively cooled by independent evaporators, and a refrigeration system is used, thereby reducing the number of components and reducing the cost.
  • the refrigerated evaporator 3 includes a coil 31 and a plurality of fins 32.
  • the coil 31 extends in a corrugated shape in the longitudinal direction (vertical direction in Fig. 6) so that the coil 31 constitutes a plurality of transverse tubular sections 31 1 in the longitudinal direction, and the adjacent transverse tubular sections 31 1 can pass through the curved transitional section 31 2 Connected so that two adjacent transverse pipe segments 31 1 and transition pipe segments 31 2 form a generally U-shape.
  • a plurality of fins 32 are arranged in the lateral direction (left-right direction in Fig.
  • the discontinuity of the fins 32 in the longitudinal direction can be achieved by disposing the longitudinally integral fins.
  • the fins 32 connected to each of the transverse pipe segments 31 1 may be separate fins such that the fins 32 connected to each of the transverse pipe segments 31 1 are discontinuous in the longitudinal direction.
  • each of the fins 32 has a plurality of breaking points between the adjacent two lateral pipe sections 31 1 in the longitudinal direction, so that each of the fins 32 is in the longitudinal direction. It consists of multiple segments that are not continuous.
  • each of the fins 32 is provided with a through hole (not shown) through which the plurality of lateral tube segments 31 1 respectively pass through the plurality of through holes on the fins 32, thereby bringing the fins 32 and the lateral direction
  • the pipe segments 31 1 are connected.
  • the fins 32 may also be welded to the transverse tube segments 31 1 , respectively.
  • the fins 32 have a split structure that is discontinuous in the longitudinal direction. Therefore, the surface tension of the water can be used to form small water droplets at the bottom end of each of the fins 32, thereby preventing the water droplets from flowing and converging along the longitudinally continuous fins, thereby causing water loss and prolonging the time that the water droplets stay on the refrigerating evaporator 3.
  • These small water droplets can be brought into the refrigerating chamber 5 by means of a water vapor circulation, so that the refrigerating chamber 5 maintains a high humidity.
  • the refrigerating fan 4 can be used to change the water droplets generated by the defrosting on the plurality of fins 32 into the refrigerating chamber 5, thereby effectively reducing the water loss in the refrigerating chamber 5, and preventing the water droplets from rapidly descending along the longitudinally continuous fins.
  • the water tray that flows and quickly converges into the bottom is discharged out of the tank 1. Therefore, the refrigerating compartment 5 can be placed in a relatively high humidity state, the moisture loss of the food is reduced and the freshness keeping time is prolonged, and the fresh-keeping performance of the refrigerating compartment 5 is remarkably improved.
  • the control method and the control system of the air-cooled water tank according to the embodiment of the present invention are described below with reference to FIG. 1 to 3.
  • the control method and the control system of the embodiment of the present invention can adjust the temperature of the refrigerating evaporator 4 according to the temperature of the refrigerating evaporator.
  • the rotational speed is such that the defrosted water on the refrigerating evaporator 3 is sent into the refrigerating compartment 5 to maintain the humidity in the refrigerating compartment 5.
  • a control method for maintaining the humidity in the refrigerating compartment 5 of the air-cooled water tank includes the following steps:
  • step S1 01 the temperature in the refrigerating compartment 5 is detected.
  • step S102 it is judged whether or not the temperature TL in the refrigerating compartment 5 is greater than or equal to the first preset temperature 1 ⁇ (step S102). If T L > T ⁇ , the refrigerating evaporator 3 is started to perform cooling and the rotation speed of the refrigerating fan 4 is adjusted to ⁇ (step S 1 03 ).
  • step S 1 04 it is further determined whether the temperature TL is lower than the second preset temperature T 2 (step S 1 04 ).
  • the refrigerating evaporator 3 is stopped and the temperature T réelle of the surface of the refrigerating evaporator 3 is detected (step S 1 05 ). Finally, the rotation speed of the refrigerating fan 4 is adjusted according to the temperature of the refrigerating evaporator 3, thereby The humidity in the refrigerating compartment 3 is adjusted (step S106). According to the control method of the embodiment of the invention, the refrigerating evaporator 3 is activated to cool the inside of the refrigerating compartment 5 when the temperature in the refrigerating compartment 5 is higher than or equal to the first preset temperature 1 ⁇ .
  • the refrigerating evaporator 3 When the temperature in the refrigerating compartment 5 satisfies the requirements, the refrigerating evaporator 3 is stopped, at which time the refrigerating fan 4 does not stop, but continues to operate to feed the defrost water on the surface of the refrigerating evaporator 3 into the refrigerating compartment 5, and The rotation speed of the refrigerating fan 4 is adjusted according to the temperature of the surface of the refrigerating evaporator 3, so that the high humidity is maintained in the refrigerating compartment 5, the moisture loss of the food in the refrigerating compartment 5 is effectively reduced, and the fresh-keeping effect is enhanced.
  • the frosting on the refrigerating evaporator 3 is relatively reduced, so that the defrosting cycle of the refrigerating compartment 5 can be lengthened, that is, the number of operations of the defrosting heating wire in the refrigerating compartment per unit time can be reduced, and the electric energy consumption can be also reduced, thereby achieving an energy saving effect.
  • the first preset temperature 1 ⁇ may be the maximum allowable temperature in the refrigerating compartment 5, and the second preset temperature T 2 may be the minimum allowable temperature in the refrigerating compartment 5.
  • the temperature in the refrigerating compartment 5 is usually 1 degree Celsius - 6 degrees Celsius. Then the first preset temperature 1 ⁇ can be set to 6 degrees Celsius, and the second preset temperature ⁇ 2 can be 1 degree Celsius.
  • the refrigerating evaporator 3 can be maintained. the fan speed running and kept refrigerated ⁇ 4 until T 2 ⁇ TL is less than T 2 stops operation of the refrigerating evaporator 3.
  • T 2 ⁇ It is also possible to stop the operation of the refrigerating evaporator 3.
  • adjusting the rotational speed of the refrigerating fan according to the temperature T of the refrigerating evaporator 3 may gradually decrease the rotational speed of the refrigerating fan 4 as the temperature rises.
  • the higher the temperature of the refrigerating evaporator 3 The lower the rotational speed of the refrigerating fan 4, the greater the humidity in the refrigerating compartment 5.
  • the speed of the refrigerating fan is adjusted according to the temperature, and the temperature is increased with the temperature.
  • the rotation speed of the refrigerating fan 4 is lowered.
  • the control method according to another embodiment of the present invention includes the following steps: First, the temperature TL in the refrigerating compartment 5 is detected (step S201).
  • step S202 it is judged whether or not the temperature TL in the refrigerating compartment 5 is greater than or equal to the first preset temperature 1 ⁇ (step S202). If T L > T ⁇ , the refrigerating evaporator 3 is started to perform cooling and the rotation speed of the refrigerating fan 4 is adjusted to ⁇ (step S203).
  • step S204 If temperature It is further determined whether the temperature TL is lower than the second preset temperature T 2 (step S204).
  • the refrigerating evaporator 3 is stopped and the temperature T réelle of the surface of the refrigerating evaporator 3 is detected (step S 205 ).
  • the rotation speed of the refrigerating fan 4 is adjusted according to the temperature of the refrigerating evaporator 3, thereby The humidity inside the refrigerating compartment 3 is adjusted. More specifically, it is judged whether or not ⁇ is smaller than t 3 (step 2601), and if T réelle ⁇ t 3 , the rotation speed of the refrigerating fan 4 is adjusted to r 2 (step 2602).
  • T Process is not less than t 3 , it is judged whether T desire is smaller than t 4 (step 2603), and if t 3 ⁇ Têt ⁇ t 4 , the rotation speed of the refrigerating fan 4 is adjusted to r 3 (step 2604). If it is not less than t 4 , then judge Tmony t 4 (step 2605 ), then adjust the rotation speed of the refrigerating fan 4 to r 4 (step 2606 ), where t 3 is the third preset temperature, and t 4 is the fourth preset. Temperature, and r 4 ⁇ r 3 ⁇ r 2 ⁇ r lo
  • the rotational speed of the refrigerating fan 4 is adjusted in accordance with the temperature of the refrigerating evaporator 3, wherein the temperature T of the refrigerating evaporator 3 is divided into three sections, it being understood that the present invention is not limited thereto. , you can divide any suitable number of segments according to the application.
  • a control system includes a refrigerating compartment temperature detecting unit 18, a refrigerating compartment temperature judging unit 19 connected to the refrigerating compartment temperature detecting unit 18, a refrigerating evaporator temperature detecting unit 20, and a control unit. 15.
  • the refrigerating compartment temperature detecting unit 18 is, for example, a temperature sensor for detecting the temperature TL in the refrigerating compartment 5.
  • the refrigerating compartment temperature judging unit 19 is for judging whether or not the temperature TL is within the range of T 2 ⁇ T L ⁇ T ⁇ .
  • the refrigerated evaporator temperature detecting unit 10 is used to detect the temperature of the evaporator.
  • the control unit 15 activates the refrigerating evaporator 3 for cooling at the temperature T > T t and adjusts the rotational speed of the refrigerating fan 4 to r l 5 and stops the refrigerating evaporator 3 when TL ⁇ T 2 and adjusts the refrigerating fan 4 according to the temperature T Formula
  • the rotation speed is to adjust the humidity in the refrigerating compartment 5.
  • control unit 15 may specifically include a refrigeration control module 17 and a refrigerating fan control module 16.
  • the refrigeration control module 17 is for controlling the operation and stop of the refrigerating evaporator 3, and the refrigerating fan control module 16 is for controlling the refrigerating fan 4.
  • control unit 15 maintains the operation of the refrigerating evaporator 3 at ⁇ 1 ⁇ 1 ⁇ and maintains the rotational speed control unit 15 of the refrigerating fan 4 to gradually reduce the rotational speed of the refrigerating fan 4 according to the temperature increase, or a phased The rotation speed of the refrigerating fan 4 is lowered.
  • control system may further include an evaporator temperature determining unit 21 for determining the evaporator temperature ⁇ .
  • the control unit 15 refrigerating fan speed 4 adjusted to r 2, at t 3 ⁇ T " ⁇ refrigerating fan speed 4 is adjusted 4 t is r 3, and the T"> t 4 when the refrigerating fan speed 4 adjusted to r 4.
  • the rotational speed of the refrigerating fan 4 can be adjusted according to the evaporator temperature, thereby feeding the defrosted water on the surface of the refrigerating evaporator 3 into the refrigerating chamber 5, so that the inside of the refrigerating chamber 5 is kept high.
  • the humidity effectively reduces the water loss of the food in the refrigerating compartment 5 and enhances the freshness preservation effect.
  • the frosting on the refrigerating evaporator 3 is relatively reduced, so that the defrost cycle of the refrigerating compartment 5 can be prolonged, that is, the number of times of refining the frosting heating wire per unit time is reduced, and the electric energy consumption is also reduced, thereby achieving an energy saving effect.
  • control unit 15, the refrigerating compartment temperature judging unit 19 and the evaporator temperature judging unit 21 are separate components, and in practical applications, they can be integrated into a single chip, which is suitable for the art. Ordinary technicians can be easily understood.
  • the air-cooled water tank according to an embodiment of the present invention may include the above-described control system.
  • the following is a description of the operation of the air-cooled water tank according to an embodiment of the present invention.
  • the control unit 15 activates the compressor 9, and the switching unit (solenoid valve) 10 switches the refrigerant to the refrigerating capillary 14, the refrigerant from the refrigerating capillary 14 enters the refrigerating evaporator 3, and then enters the refrigerating evaporator 6 from the refrigerating evaporator 3, thereby cooling the refrigerating chamber 3 and the freezing chamber 7, at which time the control unit 15 controls the revolving fan 4 to rotate at a speed r l when the refrigerating chamber 5 does not
  • the control unit 15 controls the solenoid valve 10 to switch the refrigerant to the freezing capillary 13, and the refrigerant enters the freezing evaporator 6 from the freezing capillary 13 to cool the freezing compartment 7, since the refrigerant does not enter the refrigeration.
  • the control unit 15 stops the operation of the compressor 9.
  • the refrigerating evaporator temperature detecting unit 20 detects the temperature T Mandarin of the refrigerating evaporator 3, and if T Zhao ⁇ t 3 , the control unit 15 adjusts the rotational speed of the refrigerating fan 4 to r 2 ; t 3 ⁇ Têt ⁇ t 4 , the control unit 15 adjusts the rotational speed of the refrigerating fan 4 to r 3 ; if T Vietnamese > t 4 , the control unit 15 adjusts the rotational speed of the refrigerating fan 4 to r 4 .
  • the refrigerating fan 4 feeds the defrosted water on the refrigerating evaporator 3 into the refrigerating compartment 5, thereby maintaining the humidity and freshness in the refrigerating compartment 5.
  • the independent evaporator and the air duct are respectively disposed in the refrigerating compartment and the freezing compartment of the air-cooled water tank, and the working state of the refrigerating fan is adjusted by a reasonable and flexible control manner, so that the refrigerating compartment is in a
  • the higher humidity state reduces the water loss of the food and prolongs the preservation time, thus significantly improving the freshness preservation performance of the refrigerator.
  • the refrigerating compartment and the freezing compartment have independent air duct circulation systems to avoid odor between foods, the user's needs can be further satisfied.
  • the defrosted water on the refrigerating evaporator 3 is sent to the refrigerating chamber by the refrigerating fan 4, so that the high humidity is maintained in the refrigerating chamber 5, and the moisture loss of the food in the refrigerating chamber 5 is effectively reduced, and the fresh-keeping effect is enhanced. .
  • the frosting on the refrigerating evaporator 3 is relatively reduced, so that the defrost cycle of the refrigerating compartment 5 can be prolonged, that is, the number of operations of the refrigerating compartment defrosting heating wire per unit time can be reduced, and the electric energy consumption can be reduced, thereby achieving an energy saving effect.
  • the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” and the like means a specific feature described in connection with the embodiment or example.
  • a structure, material or feature is included in at least one embodiment or example of the invention.
  • the schematic representation of the above terms does not necessarily mean the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

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Description

风冷水箱及其控制方法和控制系统 技术领域
本发明涉及风冷水箱的控制方法和控制系统和具有该控制系统的风冷水箱, 尤其是涉 及用于控制风冷水箱的冷藏室湿度的方法和系统及具有所述控制系统的风冷水箱。 背景技术
传统风冷无霜水箱通常釆用单制冷系统的制冷方式, 即仅使用一个置于冷冻室的蒸发 器和风机为冷冻室和冷藏室提供冷风, 并通过风门的开启和闭合控制冷风进入冷藏室。 然 而, 由于只有一个蒸发器, 冷藏室内的水分几乎全部通过风循环的方式带回冷冻室的蒸发 器上并结霜, 从而需要定期通过热丝的加热化霜处理将水排出水箱, 由此导致冷藏室内湿 度很低, 储藏的食物 (尤其是蔬菜、 水果等)极易失去水分, 保鲜效果较差, 容易造成食 物表皮风千、 营养流失等后果。
为此提出了具有双蒸发器循环系统的风冷无霜水箱, 其中冷藏室和冷冻室分别布置蒸 发器, 冷藏室和冷冻室的风量独立循环但是由于没有对蒸发器釆取一定的处理手段, 并且 冷藏室风机的工作状况没有进行优化, 虽然解决了食物之间的串味等对用户不利的因素, 但是冷藏室的水分在蒸发器上结霜, 然后加热化掉后排出箱体, 整个冷藏室的湿度无法保 证, 食物的保鲜时间无法保证。 发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。
为此, 本发明的一个目的在于提出一种风冷水箱的控制方法和控制系统以及具有这种 控制系统的风冷水箱, 通过对冷藏蒸发器以及冷藏风机进行合理控制, 从而灵活地控制冷 藏室内的湿度, 避免食物水分流失, 改善保鲜效果。
为了实现上述目的, 根据本发明第一方面的实施例提出一种风冷水箱的控制方法, 所 述风冷水箱具有冷藏室、 冷藏蒸发器和用于在冷藏蒸发器与冷藏室之间循环空气的冷藏风 机, 所述控制方法包括以下步骤: 检测冷藏室内的温度 TL; 判断温度 TL是否大于或等于第 一预设温度 Τ\ , 如果温度 TL > TT则启动冷藏蒸发器进行制冷且将冷藏风机的转速调整为 r1;
如果温度
Figure imgf000003_0001
则进一步判断温度 TL是否低于第二预设温度 T2 ; 如果温度 TL<T2, 停止 冷藏蒸发器制冷并检测冷藏蒸发器的温度 T„; 和根据温度 Τ„调整冷藏风机的转速以调节冷 藏室内的湿度。
根据本发明实施例的风冷水箱的控制方法, 通过为冷藏室设置独立的冷藏蒸发器和冷 藏风机, 并根据冷藏室内的温度控制冷藏蒸发器的运行以及根据冷藏蒸发器的温度合理、 灵活地调整冷藏风机的转速, 使冷藏室内具有较高的湿度, 有效减少了冷藏室内的食物的 水分流失, 增强了保鲜效果。
根据本发明实施例的风冷水箱的控制方法, 可以将冷藏蒸发器上的大部分水份带入冷 藏室, 使冷藏蒸发器上的结霜相对减少, 因此可以延长冷藏室的化霜周期或化霜加热丝的 工作次数, 因此减少了电能消耗。
进而, 所述第一预设温度 1\为冷藏室内的最大允许温度, 第二预设温度 τ2为冷藏室内 的最小允许温度。
可选地, 如果 < 1\<1\, 维持冷藏蒸发器运行且保持冷藏风机的转速 Γι
进而, 根据温度 Τ„调整冷藏风机的转速以调节冷藏室内的湿度包括随着温度 Τ„升高, 阶段性地降低冷藏风机的转速。
具体地, 根据温度 Τ„调整冷藏风机的转速以调节冷藏室内的湿度包括:
如果 T„<t3, 则将冷藏风机的转速调整为 r2;
如果 t3<T„<t4, 则将冷藏风机的转速调整为 r3;
如果 T„ > t4, 则将冷藏风机的转速调整为 r4;
其中 t3为第三预设温度, t4为第四预设温度, 且 r4 < r3 < r2 < rlo
可选地, 根据温度 T„调整冷藏风机的转速以调节冷藏室内的湿度包括随着温度 Τ„的升 高逐渐降低冷藏风机的转速。
根据本发明第二方面的实施例提出一种风冷水箱的控制系统,该风冷水箱具有冷藏室、 冷藏蒸发器和用于在冷藏蒸发器与冷藏室之间循环空气的冷藏风机, 所述控制系统包括: 冷藏室温度检测单元, 用于检测冷藏室内的温度 TL;
冷藏室温度判断单元, 用于判断温度 TL是否在 T2 < TL< T\的范围内, 其中 1\为第一预 设温度, τ2为第二预设温度;
冷藏蒸发器温度检测单元, 用于检测蒸发器的温度 Τ„; 和
控制单元, 所述控制单元用于在温度 TL > T\时启动冷藏蒸发器进行制冷且将冷藏风机 的转速调整为 r 且在 TL <T2时停止冷藏蒸发器运行并根据温度 T„调整冷藏风机的转速以 调节冷藏室内的湿度。
控制单元在 T2 < Τ <Τ\时维持冷藏蒸发器运行且保持冷藏风机的转速 Γι
进而, 所述控制单元根据温度 Τ„升高阶段性地降低冷藏风机的转速。
具体地, 根据本发明实施例的控制系统可以进一步包括用于判断蒸发器温度的蒸发器 温度判断单元, 其中在蒸发器温度判断单元判断 T„<t3时所述控制单元将冷藏风机的转速调 整为 r2, 在 t3<T„<t4时将冷藏风机的转速调整为 r3, 且在 T„> t4时将冷藏风机的转速调整 为 r4, 其中 t3为第三预设温度, t4为第四预设温度, 且 r4 < r3 < r2 < rlo
根据本发明第三方面的实施例提出一种风冷水箱, 所述风冷水箱具有冷藏室、 冷藏蒸 发器和用于在冷藏蒸发器与冷藏室之间循环空气的冷藏风机, 其中所述风冷水箱还包括根 据本发明第二方面实施例所述的控制系统。
根据本发明第三方面实施例的风冷水箱可以进一步包括冷冻室、 冷冻蒸发器, 和切换 单元, 其中所述切换单元通过冷冻毛细管与冷冻蒸发器相连, 所述冷藏蒸发器通过冷藏毛 细管与切换单元相连, 且所述冷藏蒸发器与冷藏毛细管与所述冷冻毛细管并联, 所述控制 单元控制切换单元选择性地给将制冷剂供给到冷藏蒸发器以启动或停止冷藏室的制冷。 所述冷藏蒸发器包括盘管和多个翅片, 所述盘管在纵向上呈波紋状延伸以便在纵向上 构成多层横向管段, 所述多个翅片沿横向排列且分别连接到盘管上, 其中至少一部分翅片 在纵向上分别具有至少一个断开点以便在纵向上不连续。
可选地, 每个翅片都具有分别位于相邻两层横向管段之间的多个断开点。
具体地, 每个翅片上设有多个通孔, 其中多层横向管段分别穿过所述多个通孔。 附图说明
图 1是本发明一个实施例的风冷水箱的控制方法的流程图;
图 1是本发明另一实施例的风冷水箱的控制方法的流程图;
图 3是本发明一个实施例的风冷水箱的控制系统的框图;
图 4是本发明一个实施例的风冷水箱的制冷系统的示意图;
图 5是根据本发明一个实施例的风冷水箱的结构示意图;
图 6是才 居本发明一个实施例的风冷水箱的冷藏蒸发器的示意图; 和
图 7是图 6中的圏 I的放大示意图。 具体实施方式
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其中自始至终相同 或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 下面通过参考附图描 述的实施例是示例性的, 仅用于解释本发明, 而不能理解为对本发明的限制。
在本发明的描述中, 术语 "纵向"、 "横向"、 "上,,、 "下,,、 "前,,、 "后,,、 "左,,、 "右,,、 顶"、 "底" 等指示的方位或位置关系为基于附图所示的方位或位置关系, 仅为了便于描述 本发明而不是要求本发明必须以特定的方位构造和操作 , 因此不能理解为对本发明的限制。
下面参考图 5描述根据本发明一个实施例的水箱。 如图 5 所示, 根据本发明实施例的 水箱包括箱体 1和箱门 2 , 箱体 1内限定有位于上部的冷藏室 5和位于下部的冷冻室 7。 可 选地, 在冷藏室 5和冷冻室 7之间还可以设有变温室 B。 在冷藏室 5后面 (图 5中的左侧) 设有冷藏蒸发器 3 , 在冷藏蒸发器 3与冷藏室 5之间设有冷藏风道 F , 冷藏通道 F内可以设 置泡沫材料(未示出), 冷藏风道 F与冷藏室 5之间设有冷藏风机 4 , 冷藏风机 4用于将冷 藏蒸发器 3产生的冷空气输送到冷藏室 5内。 在图 5所示的实施例中, 变温室 B也通过冷 藏蒸发器 3产生的冷空气制冷, 但是本发明并不限于此。
冷冻室 7的后面设有冷冻蒸发器 6。压缩机 9安装在箱体 1的底部,冷凝器 8设置在箱 体底部压缩机 9右侧。
下面参考图 4描述 # ^据本发明实施例的风冷水箱的制冷系统。 如图 4所示, 冷藏蒸发 器 3和冷冻蒸发器 6设置在一个制冷系统中, 压缩机 9、 冷凝器 8、 防露管 12、 千燥过滤 器 11、 作为切换单元的电磁阀 10、 和冷冻蒸发器 7依次相连, 其中电磁阀 10通过冷冻毛 细管 1 3与冷冻蒸发器 6相连。此外,电磁阀 10还通过冷藏毛细管 14与冷藏蒸发器 3相连, 冷藏蒸发器 3和冷藏毛细管 14与冷冻毛细管 1 3并联。电磁阀 10用于选择性地将制冷剂供 给到冷藏蒸发器 3 , 从而选择性地控制冷藏室 5的制冷。
根据本发明实施例的水箱, 冷藏室 5和冷冻室 7分别由独立的蒸发器制冷, 并且釆用 一个制冷系统, 从而减少了部件数量, 降低了成本。
在本发明的一些实施例中,如图 6和 7所示,冷藏蒸发器 3包括盘管 3 1和多个翅片 32。 盘管 31在纵向 (图 6中的竖直方向)上呈波紋状延伸以便盘管 31在纵向上构成多层横向 管段 31 1 , 相邻横向管段 31 1之间可以通过弧形过渡管段 31 2相连, 以便两个相邻横向管 段 31 1与过渡管段 31 2构成大体 U形。 多个翅片 32沿横向(图 6中的左右方向)排列且连 接到多层横向管段 32上, 其中至少一部分翅片 32在纵向上不连续。 在本发明的一些实施 例中, 翅片 32在纵向上不连续可以通过将纵向一个整体的翅片设置断开实现。 可选地, 每 层横向管段 31 1上连接的翅片 32可以为独立的翅片,从而每层横向管段 31 1上连接的翅片 32在纵向上不连续。
在本发明的一些具体示例中, 如图 6所示, 每个翅片 32沿纵向具有分别位于相邻两个 横向管段 31 1之间的多个断开点, 从而每个翅片 32在纵向上由不连续的多段构成。
在本发明的具体示例中, 每个翅片 32上设有通孔(未示出), 多层横向管段 31 1分别 穿过翅片 32上的多个通孔, 从而将翅片 32与横向管段 31 1相连。 可选地, 翅片 32也可以 分别焊接到横向管段 31 1上。
根据本发明的实施例, 由于翅片 32具有在纵向上不连续的分体式结构。 因此可利用水 的表面张力在每段翅片 32的底端形成小水滴, 由此避免水滴沿纵向连续的翅片流动和汇聚 从而造成水分流失, 延长了水滴停留在冷藏蒸发器 3上的时间, 可以通过水汽循环的方式 将这些小水滴带入冷藏室 5内 , 使冷藏室 5保持较高的湿度。 例如可利用冷藏风机 4将多 段翅片 32上化霜产生的小水滴变为水汽带入冷藏室 5内,有效减少冷藏室 5内的水分流失, 避免水滴顺着纵向连续的翅片迅速向下流动而很快汇聚流入底部的接水盘被排出箱体 1。 因此能够使冷藏室 5处于一个较高的湿度状态, 减少食物的水分流失并延长其保鲜时间, 显著改善冷藏室 5的保鲜性能。
下面参考图 1 - 3描述 据本发明实施例的风冷水箱的控制方法和控制系统, 居本发 明实施例的控制方法和控制系统可以根据冷藏蒸发器的温度合理、 灵活地调整冷藏风机 4 的转速, 从而将冷藏蒸发器 3上的化霜水送入冷藏室 5内 , 保持冷藏室 5内的湿度。
如图 1所示, 根据本发明一个实施例的用于保持风冷水箱的冷藏室 5 内的湿度的控制 方法包括如下步骤:
首先, 检测冷藏室 5内的温度 (步骤 S 1 01 )。
接着, 判断冷藏室 5 内的温度 TL是否大于或等于第一预设温度 1\ (步骤 S 1 02 )。 如果 TL > T\则启动冷藏蒸发器 3进行制冷且将冷藏风机 4的转速调整为 ^ (步骤 S 1 03 )。
如果温度
Figure imgf000006_0001
则进一步判断温度 TL是否低于第二预设温度 T2 (步骤 S 1 04 )。
如果温度 TL<T2, 停止冷藏蒸发器 3并检测冷藏蒸发器 3表面的温度 T„ (步骤 S 1 05 )。 最后, 根据冷藏蒸发器 3的温度 Τ„调整冷藏风机 4的转速, 由此调节冷藏室 3内的湿 度(步骤 S 1 06 )。 根据本发明实施例的控制方法, 当冷藏室 5 内的温度高于或等于第一预设温度 1\时启 动冷藏蒸发器 3以对冷藏室 5内进行制冷。 当冷藏室 5内的温度满足要求时, 停止冷藏蒸 发器 3 , 此时冷藏风机 4并不停机, 而是继续运行从而将冷藏蒸发器 3表面上的化霜水送 入冷藏室 5内 , 并且根据冷藏蒸发器 3表面的温度调节冷藏风机 4的转速, 从而使冷藏室 5 内的保持较高的湿度, 有效减少了冷藏室 5 内的食物的水分流失, 增强了保鲜效果。 而 且, 冷藏蒸发器 3上的结霜相对减少,因此可以延长冷藏室 5的化霜周期, 即减少单位时间 内冷藏室化霜加热丝的工作次数, 同样减少了电能消耗, 达到节能的效果。
在本发明的一些实施例中, 第一预设温度 1\可以为冷藏室 5 内的最大允许温度, 第二 预设温度 T2可以为冷藏室 5内的最小允许温度。 例如, 冷藏室 5内的温度通常为 1摄氏度 -6摄氏度。 那么第一预设温度 1\可以设置为 6摄氏度, 第二预设温度 Τ2可以为 1摄氏度。
在本发明的一些实施例中, 如果冷藏室 5 内的温度为丁2 < 1\<1\ , 例如, 冷藏室 5 内的 温度是从 Τ,朝向 Τ2降低, 那么可以维持冷藏蒸发器 3的运行且保持冷藏风机 4的转速 Γι , 直到 T2 < TL小于 T2停止冷藏蒸发器 3的运行。 可选地, 当 T2 <
Figure imgf000007_0001
也可以停止冷藏蒸发 器 3的运行。
在本发明的一些实施例中, 根据冷藏蒸发器 3的温度 T„调整冷藏风机的转速可以是随 着温度 Τ„升高逐渐降低冷藏风机 4的转速, 换言之, 冷藏蒸发器 3的温度越高, 冷藏风机 4的转速越低, 从而冷藏室 5内的湿度更大。
下面参考图 2描述才 居本发明另一实施例的控制方法, 在图 2所示的实施例中, 才艮据 温度 Τ„调整冷藏风机的转速是随着温度 Τ„升高, 阶段性地降低冷藏风机 4的转速。
更具体而言, 如图 2所示, 根据本发明另一实施例的控制方法包括如下步骤: 首先, 检测冷藏室 5内的温度 TL (步骤 S201 )。
接着, 判断冷藏室 5 内的温度 TL是否大于或等于第一预设温度 1\ (步骤 S 202 )。 如果 TL > T\则启动冷藏蒸发器 3进行制冷且将冷藏风机 4的转速调整为 ^ (步骤 S 203 )。
如果温度
Figure imgf000007_0002
则进一步判断温度 TL是否低于第二预设温度 T2 (步骤 S 204 )。
如果温度 TL<T2, 停止冷藏蒸发器 3并检测冷藏蒸发器 3表面的温度 T„ (步骤 S 205 )。 接下, 根据冷藏蒸发器 3的温度 Τ„调整冷藏风机 4的转速, 由此调节冷藏室 3内的湿 度。 更具体而言, 判断 Τ„是否小于 t3 (步骤 2601 ), 如果 T„< t3,将冷藏风机 4的转速调整为 r2 (步骤 2602 )。 如果 T„不小于 t3,则判断 T„是否小于 t4 (步骤 2603 ), 如果 t3 < T„<t4, 则 将冷藏风机 4的转速调整为 r3 (步骤 2604 )。 如果 T„不小于 t4 , 则判断 T„> t4 (步骤 2605 ), 则将冷藏风机 4的转速调整为 r4 (步骤 2606 )。 其中 t3为第三预设温度, t4为第四预设温 度, 且 r4 < r3 < r2 < rl o
在上面的实施例中, 根据冷藏蒸发器 3的温度分段调节冷藏风机 4的转速, 其中冷藏 蒸发器 3的温度 T„划分了三个区段, 需要理解的是, 本发明并不限于此, 可以根据应用划 分任何合适数量的区段。
根据本发明的上述实施例, 通过检测冷藏蒸发器 3 的温度, 分阶段地灵活调节冷藏风 机 4的转速, 因此保证了冷藏室 5内的湿度, 改善了冷藏室 5内的保鲜度。 下面参考图 3描述根据本发明实施例的风冷水箱的控制系统。 如图 3所示, 根据本发 明一个实施例的控制系统包括冷藏室温度检测单元 18 , 与冷藏室温度检测单元 18相连的 冷藏室温度判断单元 19 , 冷藏蒸发器温度检测单元 20 , 和控制单元 15。
冷藏室温度检测单元 18例如为温度传感器, 用于检测冷藏室 5内的温度 TL。 冷藏室温 度判断单元 19用于判断温度 TL是否在 T2 < TL< T\的范围内。 冷藏蒸发器温度检测单元 10 用于检测蒸发器的温度 Τ„。
控制单元 15在温度 T > Tt时启动冷藏蒸发器 3进行制冷且将冷藏风机 4的转速调整为 rl 5 而在 TL <T2时停止冷藏蒸发器 3并根据温度 T„调整冷藏风机 4的转速以调节冷藏室 5 内的湿度。
在本发明的一些实施例中, 如图 3所示, 控制单元 15可以具体包括制冷控制模块 17 和冷藏风机控制模块 16。 制冷控制模块 17用于控制冷藏蒸发器 3的运行和停止, 而冷藏 风机控制模块 16用于控制冷藏风机 4。
可选地, 控制单元 15在 < 1\<1\时维持冷藏蒸发器 3运行且保持冷藏风机 4的转速 控制单元 15可以根据温度 Τ„升高逐渐地降低冷藏风机 4的转速,或者阶段性地降低冷 藏风机 4的转速。
在本发明的一个示例中, 控制系统可以进一步包括蒸发器温度判断单元 21 , 用于判断 蒸发器温度 Τ„。 例如, 当蒸发器温度判断单元 21判断 T„< t3时, 控制单元 15将冷藏风机 4 的转速调整为 r2 , 在 t3 < T„< t4时将冷藏风机 4的转速调整为 r3, 且在 T„> t4时将冷藏风机 4的转速调整为 r4
根据本发明实施例的控制系统, 可以根据蒸发器温度调节冷藏风机 4 的转速, 从而将 冷藏蒸发器 3表面上的化霜水送入冷藏室 5内, 使冷藏室 5内的保持较高的湿度, 有效减 少了冷藏室 5 内的食物的水分流失, 增强了保鲜效果。 而且, 冷藏蒸发器 3上的结霜相对 减少,因此可以延长冷藏室 5 的化霜周期, 即减少单位时间内冷藏室化霜加热丝的工作次 数, 同样减少了电能消耗, 达到节能的效果。
需要理解的是, 在上面的描述中, 控制单元 15、 冷藏室温度判断单元 19和蒸发器温度 判断单元 21为单独的部件, 在实际应用中, 它们可以集成单个芯片中, 这对于本领域的普 通技术人员是能够容易理解的。
才艮据本发明实施例的风冷水箱可以包括上述控制系统。 下面筒单描述 # ^据本发明实施 例的风冷水箱的操作。
当冷藏室 5和冷冻室 7内的温度高于预设温度需要制冷时,控制单元 15启动压缩机 9 , 控制切换单元(电磁阀) 10将制冷剂切换到冷藏毛细管 14 , 制冷剂从冷藏毛细管 14进入 冷藏蒸发器 3 , 然后从冷藏蒸发器 3进入冷冻蒸发器 6 , 从而对冷藏室 3和冷冻室 7进行制 冷, 此时控制单元 15控制冷藏风机 4的转速为 rl 当冷藏室 5不需制冷而冷冻室 7需要制 冷时, 控制单元 15控制电磁阀 10将制冷剂切换到冷冻毛细管 13 , 制冷剂从冷冻毛细管 13 进入冷冻蒸发器 6对冷冻室 7进行制冷, 由于制冷剂没有进入冷藏蒸发器 3 , 因此冷藏室 5 没有制冷。 当冷藏室 5和冷冻室 7都不需要制冷时, 控制单元 15停止压缩机 9运行。 当冷藏室 5内没有被制冷时,冷藏蒸发器温度检测单元 20检测冷藏蒸发器 3的温度 T„, 并且如果 T„< t 3 , 控制单元 15将冷藏风机 4的转速调整为 r2; 如果 t 3 < T„< t4 , 控制单元 15 将冷藏风机 4的转速调整为 r3; 如果 T„ > t4 , 控制单元 15将冷藏风机 4的转速调整为 r4。 由此, 冷藏风机 4将冷藏蒸发器 3上的化霜水送入冷藏室 5内, 由此保持了冷藏室 5内的 湿度和保鲜度。
根据本发明的实施例, 通过在风冷水箱的冷藏室和冷冻室分别设置独立的蒸发器和风 道, 并釆用合理、 灵活的控制方式对冷藏风机的工作状态进行调整, 使冷藏室处于一个较 高的湿度状态, 减少食物的水分流失, 延长其保鲜时间, 因此显著改善了冷藏室的保鲜性 能。 同时, 由于冷藏室和冷冻室具有独立的风道循环系统, 避免食物之间产生串味, 能够 进一步满足用户需求。
而且, 通过冷藏风机 4将冷藏蒸发器 3上的化霜水送入冷藏室, 使冷藏室 5 内的保持 较高的湿度, 有效减少了冷藏室 5 内的食物的水分流失, 增强了保鲜效果。 而且, 冷藏蒸 发器 3上的结霜相对减少,因此可以延长冷藏室 5的化霜周期,即减少单位时间内冷藏室化 霜加热丝的工作次数, 同样减少了电能消耗, 达到节能的效果。
在本说明书的描述中, 参考术语 "一个实施例"、 "一些实施例"、 "示例"、 "具体示 例"、 或 "一些示例" 等的描述意指结合该实施例或示例描述的具体特征、 结构、 材料或者 特点包含于本发明的至少一个实施例或示例中。 在本说明书中, 对上述术语的示意性表述 不一定指的是相同的实施例或示例。 而且, 描述的具体特征、 结构、 材料或者特点可以在 任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施例, 本领域的普通技术人员可以理解: 在不脱离 本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型, 本发 明的范围由权利要求及其等同物限定。

Claims

权利要求书
1、 一种风冷水箱的控制方法, 所述风冷水箱具有冷藏室、 冷藏蒸发器和用于在冷藏蒸 发器与冷藏室之间循环空气的冷藏风机, 其特征在于, 所述控制方法包括以下步骤: 检测冷藏室内的温度 TL;
判断温度 TL是否大于或等于第一预设温度 1\, 如果温度 TL > T\则启动冷藏蒸发器进行 制冷且将冷藏风机的转速调整为 r1;
如果温度
Figure imgf000010_0001
则进一步判断温度 TL是否低于第二预设温度 T2;
如果温度 Τ <Τ2, 停止冷藏蒸发器并检测冷藏蒸发器的温度 Τ„; 和
根据温度 τ„调整冷藏风机的转速以调节冷藏室内的湿度。
2、根据权利要求 1所述的控制方法, 其特征在于, 所述第一预设温度 1\为冷藏室内的 最大允许温度, 第二预设温度 Τ2为冷藏室内的最小允许温度。
3、 根据权利要求 1所述的控制方法, 其特征在于, 如果 <1\<1\, 则维持冷藏蒸发器 运行且保持冷藏风机的转速 Γι
4、根据权利要求 1所述的控制方法, 其特征在于, 根据温度 Τ„调整冷藏风机的转速以 调节冷藏室内的湿度包括随着温度 Τ„升高, 阶段性地降低冷藏风机的转速。
5、根据权利要求 4所述的控制方法, 其特征在于, 根据温度 Τ„调整冷藏风机的转速以 调节冷藏室内的湿度包括:
如果 T„<t3, 则将冷藏风机的转速调整为 r2;
如果 t3<T„<t4, 则将冷藏风机的转速调整为 r3;
如果 T„ > t4, 则将冷藏风机的转速调整为 r4;
其中 t3为第三预设温度, t4为第四预设温度, 且 r4 < r3 < r2 < rlo
6、 如权利要求 1所述的控制方法, 其特征在于, 根据温度 T„调整冷藏风机的转速以调 节冷藏室内的湿度包括随着温度 Τ„的升高逐渐降低冷藏风机的转速。
7、 一种风冷水箱的控制系统, 所述风冷水箱具有冷藏室、 冷藏蒸发器和用于在冷藏蒸 发器与冷藏室之间循环空气的冷藏风机, 其特征在于, 所述控制系统包括:
冷藏室温度检测单元, 用于检测冷藏室内的温度 TL;
冷藏室温度判断单元, 用于判断温度 TL是否在 T2 < TL< T\的范围内, 其中 1\为第一预 设温度, T2为第二预设温度;
冷藏蒸发器温度检测单元, 用于检测蒸发器的温度 Τ„; 和
控制单元, 所述控制单元用于在温度 TL > T\时启动冷藏蒸发器进行制冷且将冷藏风机 的转速调整为 r 且在 TL <T2时停止冷藏蒸发器运行并根据温度 T„调整冷藏风机的转速以 调节冷藏室内的湿度。
8、根据权利要求 7所述的控制系统, 其特征在于, 所述控制单元在 <1\<1\时维持冷 藏蒸发器运行且保持冷藏风机的转速 ^。
9、根据权利要求 7所述的控制系统, 其特征在于, 所述控制单元根据温度 T„升高阶段 性地降低冷藏风机的转速。
10、 根据权利要求 9所述的控制系统, 其特征在于, 进一步包括用于判断蒸发器温度 的蒸发器温度判断单元, 其中在蒸发器温度判断单元判断 T„< t3时所述控制单元将冷藏风机 的转速调整为 r2 , 在 t3 < T„< t4时将冷藏风机的转速调整为 r3, 且在 T„> t4时将冷藏风机的 转速调整为 r4 , 其中 t3为第三预设温度, t4为第四预设温度, 且 r4 < r3 < r2 < rl o
11、 一种风冷水箱, 所述风冷水箱具有冷藏室、 冷藏蒸发器和用于在冷藏蒸发器与冷 藏室之间循环空气的冷藏风机, 其特征在于, 所述风冷水箱还包括根据权利要求 7至 10中 任一项所述的控制系统。
12、根据权利要求 11所述的风冷水箱, 其特征在于, 进一步包括冷冻室、冷冻蒸发器, 和切换单元, 其中所述切换单元通过冷冻毛细管与冷冻蒸发器相连, 所述冷藏蒸发器通过 冷藏毛细管与切换单元相连, 且所述冷藏蒸发器与冷藏毛细管与所述冷冻毛细管并联, 所 述控制单元控制切换单元选择性地给将制冷剂供给到冷藏蒸发器以启动或停止冷藏室的制 冷。
13、 根据权利要求 11所述的风冷水箱, 其特征在于, 所述冷藏蒸发器包括盘管和多个 翅片, 所述盘管在纵向上呈波紋状延伸以便在纵向上构成多层横向管段, 所述多个翅片沿 横向排列且分别连接到盘管上, 其中至少一部分翅片在纵向上分别具有至少一个断开点以 便在纵向上不连续。
14、 根据权利要求 13所述的风冷水箱, 其特征在于, 每个翅片都具有分别位于相邻两 层横向管段之间的多个断开点。
15、 根据权利要求 14所述的风冷水箱, 其特征在于, 每个翅片上设有多个通孔, 其中 多层横向管段分别穿过所述多个通孔。
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