CN100370198C - Refrigerator - Google Patents
Refrigerator Download PDFInfo
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- CN100370198C CN100370198C CNB038192969A CN03819296A CN100370198C CN 100370198 C CN100370198 C CN 100370198C CN B038192969 A CNB038192969 A CN B038192969A CN 03819296 A CN03819296 A CN 03819296A CN 100370198 C CN100370198 C CN 100370198C
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- Prior art keywords
- producing medium
- cold
- control device
- refrigerator
- omen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
- F25B2500/222—Detecting refrigerant leaks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2511—Evaporator distribution valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/04—Refrigerators with a horizontal mullion
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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)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
A refrigerator comprising storerooms (2, 3, 4, 5) provided in a refrigerator body (1); a compressor (20), a condenser (27) and evaporators (14, 16) are provided; a high-voltage electrical component (23) provided to the refrigerator body; a refrigerating means (70) which refrigerates the storerooms by driving the compressor; a low-pressure side refrigerant leakage sensor (70) which detects a refrigerant leakage or a premonitory sign of leakage from the low-pressure side of the freezing cycle unit; and a false detection control means (70) which temporarily stops the operation of the high-voltage electrical component while allowing the refrigerating means to continue the refrigerating operation when the low-pressure side refrigerant leakage sensor has detected a refrigerant leakage or a premonitory sign of leakage.
Description
Technical field
The present invention relates to use in the kind of refrigeration cycle refrigerator of combustible refrigerant.
Background technology
In recent years, for the protection of ozone layer, the concern that the global greenhouse effect problem more and more is subjected to the world, the cold-producing medium that uses in the kind of refrigeration cycle to refrigerator and air-conditioning etc. is also being assessed again.For example, the great majority of selling on the present market are to use as cold-producing medium with the HFC (carbon fluorine hydrogen) that does not damage the ozone layer.But, the global greenhouse effect coefficient ratio nature cold-producing medium height of HFC cold-producing medium.Therefore, need neither to damage the ozone layer and the global greenhouse effect coefficient low: HC (hydrocarbon) uses as cold-producing medium, the commercialization of such refrigerator.But the HC cold-producing medium has combustibility, thereby has the problem of the security when guaranteeing the cold-producing medium leakage.
For this reason, this case applicant has applied for following a kind of refrigerator, that is, have and detect the device that cold-producing medium leaks, and when detecting cold-producing medium and leaking this situation is informed and refrigerator out of service (Japanese patent application 2001-336602 number etc.).Above-mentioned patent application according to the load of compressor for example the dutycycle of air compressor motor (Japanese: rate of change デ ユ-テ ィ value) detects the leakage of cold-producing medium.
But, act on the load of compressor, even also can produce very big change sometimes when normally carrying out because of mobile become during instability etc. that the food of the on-off action of refrigerator doors or higher temperature is put into refrigerator or cold-producing medium in cooling.
For example, Fig. 8 represent to have refrigeration with evaporimeter (hereinafter referred to as the R evaporimeter) and freezing with evaporimeter (hereinafter referred to as the F evaporimeter), make cold-producing medium alternately flow to these evaporimeters with variation to the dutycycle of the air compressor motor of the refrigerator that cools off in the case.
Among Fig. 8, " R cooling " expression is supplied with the operational mode of R evaporimeter so that refrigerating chamber or vegetable compartment are cooled off with cold-producing medium." F cooling " expression is supplied with the operational mode of F evaporimeter so that refrigerating chamber etc. is cooled off with cold-producing medium.Stop the state of the operation of compressor etc. when " stopping " expression and reaching cooling in the case and stop temperature etc.In addition, the door of " in opening the door " expression refrigerating chamber is in the state of opening.
As shown in Figure 8, from the F refrigerating mode switch to the R refrigerating mode or after the R refrigerating mode switches to the F refrigerating mode soon, the temperature of each chamber and evaporimeter is higher, so load acts on compressor, the dutycycle of air compressor motor sharply rises.After this, after the temperature decline that reaches evaporimeter in the case was stable, the load that acts on compressor reduced, and dutycycle descends and stablizes.
On the other hand, when in that cooling is in service when opening, the cold air in the case leaks towards the outside.For this reason, near the cool cycles that is configured in opening the door the evaporimeter stops with fan.Therefore, the heat exchange of evaporimeter is inhibited, and the load that acts on compressor temporarily reduces, and dutycycle descends.
Therefore, be judged as cold-producing medium as all changes without exception leakage has taken place, do not leak but still the operation of refrigerator is stopped although in fact cold-producing medium then takes place according to the dutycycle of air compressor motor.But, adopt in the refrigerator of combustible refrigerant, the detection that exists cold-producing medium to leak postpones to cause the worry of fire generation, wishes that detection is more early good more period.
Summary of the invention
The object of the present invention is to provide a kind of at the refrigerator that combustible refrigerant is used for kind of refrigeration cycle, can detect the refrigerator whether cold-producing medium leaks from kind of refrigeration cycle as early as possible.
Refrigerator according to the present invention comprises: refrigerator body;
Be arranged on the storeroom in the described refrigerator body; The kind of refrigeration cycle that has compressor, condenser, evaporimeter and enclose combustible refrigerant: be arranged on the high voltage electrical parts in the described refrigerator body; Control device, described control device cools off storeroom by the drive compression machine, and wherein, described control device also is arranged to: detect the omen that described cold-producing medium leaks from the low-pressure side of described kind of refrigeration cycle; When detecting the omen of described cold-producing medium leakage by described low-pressure side refrigerant leakage detecting device, described control device makes described cooling running gear continue to carry out the cooling operation, temporarily stop simultaneously the high voltage electrical parts, the drive source of described compressor is made of the motor that carries out VFC by pulse width modulation, and control device reaches the situation more than the setting based on the dutycycle of described motor with respect to the increment rate of reference duty cycle and detects cold-producing medium and is about to the omen of leaking.
According to a further aspect of the invention, a kind of refrigerator comprises: refrigerator body; Be arranged on the storeroom in the described refrigerator body; The kind of refrigeration cycle that has compressor, condenser, evaporimeter and enclose combustible refrigerant; Be used to distribute the radiator fan of the heat of described compressor or described condenser; Control device, described control device cools off described storeroom by driving described compressor, wherein, described control device also is arranged to: detect situation that described cold-producing medium leaked from the high-pressure side of described kind of refrigeration cycle or described cold-producing medium and be about to the omen of leaking; This control device when detecting the omen that situation that cold-producing medium leaked or cold-producing medium be about to leak by described high-pressure side refrigerant leakage detecting device, the operation of described compressor stopped and making described radiator fan restart the operation of described compressor after the rotation stipulated time.
The present invention, be in having the refrigerator of enclosing the kind of refrigeration cycle that combustible refrigerant constitutes, when in detecting described kind of refrigeration cycle, producing cold-producing medium and leaking such damage, the structure of the processing of the danger that may cause when being used to avoid cold-producing medium to leak.That is, when the low-pressure side generation cold-producing medium in kind of refrigeration cycle leaked such damage, after outer gas entered in the kind of refrigeration cycle from the damage happening part, the cold-producing medium in the kind of refrigeration cycle spilt gradually.Therefore, when detecting described cold-producing medium, continue to carry out the cooling operation, and the high voltage electrical parts that are arranged in the refrigerator body are temporarily stopped from the low-pressure side of kind of refrigeration cycle is leaked or described cold-producing medium leaks omen.
In addition, when when generation cold-producing medium in the high-pressure side of kind of refrigeration cycle leaks such damage, the cold-producing medium in the kind of refrigeration cycle spills rapidly from the damage happening part.Therefore, when detecting the omen that cold-producing medium leaks from the high-pressure side of kind of refrigeration cycle or described cold-producing medium leaks, stop to constitute the operation of the compressor of described kind of refrigeration cycle, the radiator fan of described compressor after the rotation stipulated time, is moved described compressor once again.
By such structure, can detect cold-producing medium from the omen that kind of refrigeration cycle is leaked or cold-producing medium leaks in period early, improve security.In addition, if detection ahead of time period, then under whether the cold-producing medium reality of kind of refrigeration cycle has leaked to uncertain state, judge, can increase the possibility that flase drop is surveyed whether damage taking place.But, among the present invention, in the scope that can guarantee security, continue the cooling operation, so when the such damage of cold-producing medium leakage takes place, also can reduce harmful effect as far as possible to the food in the refrigerator.
When cold-producing medium taking place when kind of refrigeration cycle is leaked such damage, because of air enters or cold-producing medium spills from this damage happening part, the load of compressor changes a lot.The drive source of the compressor of kind of refrigeration cycle be by undertaken by pulse width modulation frequency conversion (Japanese: when the motor of the control of ィ Application バ-) constitutes, along with the load change of described compressor, the dutycycle change of described motor.Therefore, according to the dutycycle of described motor, can detect cold-producing medium just from kind of refrigeration cycle is leaked or cold-producing medium leaks omen.
Description of drawings
Fig. 1 is one embodiment of the invention, and expression is used for detecting kind of refrigeration cycle and has taken place that cold-producing medium leaks or a part of flow chart of the control content of the control device of omen that cold-producing medium leaks.
Fig. 2 is the subsequent figure of the flow chart of presentation graphs 1.
Fig. 3 is the integrally-built longitudinal side of an expression refrigerator cutaway view.
Fig. 4 is the figure of expression kind of refrigeration cycle.
Fig. 5 is the block diagram of summary of the electrical structure of expression refrigerator.
Fig. 6 is the figure of change of the dutycycle of the low-pressure side that the is illustrated in kind of refrigeration cycle air compressor motor when having taken place that cold-producing medium leaks.
Fig. 7 is the figure of change of the dutycycle of the high-pressure side that the is illustrated in kind of refrigeration cycle air compressor motor when having taken place that cold-producing medium leaks.
Fig. 8 is the figure of change of the dutycycle of the expression door air compressor motor when opening.
The specific embodiment
Below, with reference to accompanying drawing the present invention is described in more detail.
Fig. 1 to Fig. 7 represents one embodiment of the invention.Among integrally-built Fig. 3 of refrigerator of expression present embodiment, the refrigerator body 1 that constitutes by body of thermal insulating box in, be provided with refrigerating chamber 2, vegetable compartment 3, switching chamber 4, refrigerating chamber 5 successively as storeroom from top beginning.In addition, be equipped with ice-making compartment (not shown) on the next door of described switching chamber 4 with automatic ice-making plant transversely arrangedly.
Separate by plastic dividing plate 10 between refrigerating chamber 2 and the vegetable compartment 3.Separate by adiabatic next door 11 between vegetable compartment 3 and switching chamber 4 and the ice-making compartment.In addition, separate by not shown adiabatic next door between switching chamber 4 and the ice-making compartment.Thus, the cold air that flows in vegetable compartment 3, switching chamber 4, ice-making compartment is separate.
Be provided with the door 6 of hinge open and close type with thermal insulation in the front of refrigerating chamber 2.Be respectively equipped with the door 7,8,9 of drawer type with thermal insulation in the front of vegetable compartment 3, switching chamber 4, refrigerating chamber 5.
The inboard of the bottom in refrigerating chamber 2 is provided with the deodorization device 23 that makes photocatalyst activityization carry out deodorization with air in to case by high voltage.Top in top in refrigerating chamber 2, the switching chamber 4, the door switch 57 that the top in the refrigerating chamber 5 is respectively equipped with the on-off action of detecting gate 6,8,9.And the top in refrigerating chamber 2 is provided with lamp inside the box 17.
Front surface at described door 6 is provided with guidance panel 60.Described guidance panel 60 has: with the display part 62 of the running status of the voice portion 61 of voice informing generation abnormal conditions, display refrigerator and temperature, be used to regulate the operating portion 63 (all only being shown in Fig. 5) of the demonstration of the temperature inside the box and running mode switching or described display part 62.
Be provided with electric door opener 25 on the top of described refrigerator body 1.Although not shown, described door opener 25 comprises: the electromagnet that during energising plunger is moved to the direction of opening described door 6; Move to push the push strut of described door 6 with described plunger one.By operating operation portion 63 or be arranged on the switch drive described door opener 25 of door on 6, described door 6 is opened.
The rear portion of the refrigerating chamber 2 in refrigerator body 1 is provided with pipeline 12.In addition, the rear portion of the vegetable compartment in refrigerator body 13 is provided with refrigeration evaporator room (hereinafter referred to as R evaporator room) 100.In R evaporator room 100, be provided with: the refrigeration evaporimeter (hereinafter referred to as the R evaporimeter) 14 etc. of the cooler of refrigeration cool cycles fan (hereinafter referred to as the R fan) 13, formation refrigerating chamber 2 and vegetable compartment 3.When R fan 13 drives, then repeat after the cold air of R evaporimeter 14 coolings is supplied with in the refrigerating chambers 2 by pipeline 12, return the such circulation of R evaporator room 100 via vegetable compartment 3.Thus, refrigerating chamber 2 and vegetable compartment 3 obtain cooling.
The rear portion of the switching chamber 4 in refrigerator body 1, ice-making compartment, refrigerating chamber is provided with freezing with evaporator room (hereinafter referred to as F evaporator room) 101.In F evaporator room 101, be provided with: freezing with cool cycles fan (hereinafter referred to as the F fan) 15; Constitute to switch cooler freezing of chamber 4, ice-making compartment and refrigerating chamber 5 with evaporimeter (hereinafter referred to as the F evaporimeter) 16, by the preheating (Defrost heater 18 that the heater of Japanese: シ-ズ) constitutes etc.
When F fan 15 drives, then repeat after the cool-air feed of F evaporimeter 16 coolings switches chamber 4, refrigerating chamber 5, ice-making compartment, return the such circulation of F evaporator room 101.Thus, switching chamber 4, refrigerating chamber 5, ice-making compartment obtain cooling.
In addition, the rear lower in refrigerator body 1 forms Machine Room 22.In described Machine Room 22, be provided with: compressor 20, by wire-shaped cooling fin tube (Japanese: radiator fan (hereinafter referred to as the C fan) 19 of condenser 27, cooling compressor 20 and condenser 27 usefulness of Gou Chenging etc. ヮ ィ ャ Off ィ Application チ ユ-Block).
Fig. 4 is the structure of kind of refrigeration cycle of the refrigerator of expression present embodiment.The kind of refrigeration cycle of present embodiment is used combustible refrigerant, for example HC cold-producing medium as cold-producing medium.
As shown in Figure 4, the outlet 20a of compressor 20 is connected with condenser 27.The outlet of described condenser 27 is connected with the import interface of transfer valve 26.In 2 discharge couplings of described transfer valve 26 one is connected with the import of R evaporimeter 14 with capillary (hereinafter referred to as the R capillary) 29 by refrigeration.In addition, the opposing party's of described transfer valve 2 discharge coupling is connected with the import of F evaporimeter 16 with capillary (hereinafter referred to as the F capillary) 30 by freezing.In addition, the outlet of described R evaporimeter 14 is connected with the import of F evaporimeter 16.The outlet of F evaporimeter 16 is connected with the suction inlet 20b of compressor 20 by gas receiver 34.
Described transfer valve 26 for example is the structure of Motor Drive formula, changeable one-tenth: with any one state that is communicated with, the state (full-gear) that is communicated with both sides, the whole disconnected state (full closing state) in import interface and 2 discharge couplings.
As described later, in the refrigeration refrigerating mode of refrigerated compartment 2 and vegetable compartment 3, transfer valve 26 switches to the 1st path that cold-producing medium flows through R capillary 29 in the refrigerant flow path, flows to F evaporimeter 16 by R evaporimeter 14.In addition, in the freezing refrigerating mode of cooling refrigerating chamber 5, switching chamber 4, ice-making compartment, transfer valve 26 switches to cold-producing medium and flows through the 2nd path that F capillary 30 flows to F evaporimeter 16.
Fig. 5 represents the electric formation of the refrigerator of present embodiment.The drive source of the voice portion 61 of control device 70 and door switch 57, a plurality of indoor temperature transmitter 58, outer temperature degree sensor 71, a plurality of evaporator temperature sensor 59, guidance panel 60, display part 62, operating portion 63, compressor 20 is that air compressor motor 200, R fan 13, F fan 15, C fan 19, Defrost heater 18, lamp inside the box 17, deodorization device 23, door opener 25, transfer valve 26 etc. are connected.
Here omit detailed explanation, described control device 70 constitutes the VFC of utilizing pulse width modulation to carry out and drives described air compressor motor 200.As described later, control device 70 detects the load of compressor 20 according to the dutycycle of pulse width modulation, still is that the high-pressure side is detected to the position that not damaged is arranged in the kind of refrigeration cycle and damage takes place in the low-pressure side of kind of refrigeration cycle.And,, detect generation or the cold-producing medium that cold-producing medium leaks in the kind of refrigeration cycle and leak the omen that takes place according to its testing result.
Here, the limit describes with reference to Fig. 6 and Fig. 7 limit relation to the dutycycle of the load of compressor 20 and air compressor motor 200.Fig. 6 and Fig. 7 represent experimental result that the variation of the dutycycle of the air compressor motor 200 when damage has taken place for the low-pressure side of kind of refrigeration cycle and high-pressure side is investigated respectively.Here, because pin hole has appearred on the pipeline of kind of refrigeration cycle, as damage has taken place.The low-pressure side of so-called kind of refrigeration cycle is meant between the suction inlet 20b from capillary 29,30 to compressor 20, and the high-pressure side of so-called kind of refrigeration cycle is meant that outlet 20a from compressor 20 is between the capillary 29,30.
In Fig. 6 and Fig. 7, " R cooling " is meant the refrigeration refrigerating mode, and " F cooling " is meant freezing refrigerating mode." stop " being meant air compressor motor 200 off-positions, close transfer valve 26 when " operation stops " being meant air compressor motor 200 outage, and R fan 13, F fan 15, C fan 19 for open (ON) state, other electric component is pass (OFF) state.In addition, represent with arrow A when on the pipeline of kind of refrigeration cycle, pin hole having occurred, represent with arrow B when detecting the omen that the cold-producing medium generation is leaked or the cold-producing medium generation is leaked.And, in Fig. 6, when abending, compressor 20 represents with arrow C.
As shown in Figure 6, when pin hole having occurred on the pipeline in the low-pressure side of kind of refrigeration cycle, then the dutycycle of air compressor motor 200 rises.This can think that the pipeline of pin hole is interior to be low pressure because occurred, so outer gas sucks the cause that load acts on compressor 20 from described pin hole.In addition, as shown in Figure 6, when the dutycycle of air compressor motor 200 continues to rise, then can't make the rotor rotation of air compressor motor 200 with the speed that matches with rotary speed instruction, thereby control device 70 makes described air compressor motor 70 force to stop (abending).
But, even damage, suck outer gas momently cold-producing medium is leaked in the low-pressure side of kind of refrigeration cycle.And air compressor motor 200 stops the back or after refrigerating mode alternately repeated 1,2 time, cold-producing medium leaked gradually.
On the other hand, as shown in Figure 7, when pin hole having occurred on the on high-tension side pipeline in kind of refrigeration cycle, then the dutycycle of air compressor motor 200 reduces.This can think because occurred being high pressure in the pipeline of pin hole, so when occurring along with pin hole, cold-producing medium sharply begins leakage, the cause of the load reduction of compressor 20.
By contrast, even under the normal condition before in kind of refrigeration cycle, damaging, by running mode switching, the dutycycle change of air compressor motor 200.In addition, after switching to the R refrigerating mode, the F refrigerating mode aspirates (Japanese: Port Application ダ ゥ Application soon, " low-pressure side is found time ") (reclaiming with the cold-producing medium in the evaporimeter) operation with compressor suction is freezing, so the dutycycle of air compressor motor 200 temporarily rises.And, compressor 20 instabilities when the F refrigerating mode after compressor 20 stops to begin, the dutycycle of air compressor motor 200 temporarily rises.And, even open, also can make the dutycycle of air compressor motor 200 that very big change (with reference to Fig. 8) takes place because of door 6.
Thus, among control device 70 cuts out according to door and the change of the dutycycle in the same operational mode detect generation or the cold-producing medium that cold-producing medium leaks and leak the omen that takes place.
Then the effect to present embodiment describes.At first, the cooling operation of carrying out as the control device 70 of cooling operation actuating unit is described.Control device 70 is alternately carried out by switching transfer valve 26: the refrigeration refrigerating mode that refrigerating chamber 2 and vegetable compartment 3 are cooled off; Be used for refrigerating chamber 5, switch the freezing refrigerating mode that cool off chamber 4, ice-making compartment.
In the refrigeration refrigerating mode, control device 70 switches transfer valve R26, so that cold-producing medium flows through R capillary 29, flows to F evaporimeter 16 by R evaporimeter 14.At this moment, R fan 13 and C fan 19 are driven.Thus, supply with refrigerating chamber 2 and vegetable compartment 3, make refrigerating chamber 2 and vegetable compartment 3 obtain cooling by the air of R evaporimeter 14 coolings.
In freezing refrigerating mode, control device 70 switches transfer valve 26, flows to F evaporimeter 16 so that cold-producing medium flows through F capillary 30.At this moment, F fan 15 and C fan 19 are driven.Thus, supply with refrigerating chamber 5 and switch chamber 4, ice-making compartment, make refrigerating chamber 5, switching chamber 4, ice-making compartment obtain cooling by the air of F evaporimeter 16 coolings.Switch quantity delivered that chamber 4 can be by air door adjusting cold air such as (not shown) to become the temperature of setting.
In addition, in freezing refrigerating mode, control device 70 also drives R fan 13.This is to promote defrosting in order to eliminate the frost that sticks on the R evaporimeter 14.Thus, the amount of moisture that contains in the air of circulation in refrigerating chamber 5 increases, and can improve the humidity in the refrigerating chamber 5.
The moment of switching refrigeration refrigerating mode and freezing refrigerating mode can be according to decision in advance such as the time of implementation of each pattern and the temperature of refrigerating chamber 2 and refrigerating chamber 5.
For example, after the refrigeration refrigerating mode has passed through official hour (for example 20 minutes), or refrigerating chamber 2 reached cooling and stops temperature and refrigerating chamber 5 and rise to set point of temperature (for example 2 ℃) when above with respect to target temperature, switches to freezing refrigerating mode from refrigerating refrigerating mode.
In addition, except above-mentioned cooling operation, the Cumulative Elapsed Time of compressor 20 for example passed through 8 hours, and then Defrost operation is carried out in 18 energisings of 70 pairs of Defrost heaters of control device.Thus, eliminate the frost that sticks on the F evaporimeter 16.The temperature that reaches regulation when the temperature of F evaporimeter 16 for example 3 ℃ the time, finishes Defrost operation, restarts common cooling operation.
Then, control device 70 performed contents processings are described for the generation that detects cold-producing medium and leak and cold-producing medium leak the omen that takes place with reference to the flow chart of Fig. 1 and Fig. 2.
To be in out (ON) state (is YES in step 1) be that condition enters step 2 to control device 70 to carry out common cooling operation and high-tension electric component.
In step 2, whether decision gate 6 is in closed condition.And, door 6 (YES) when being in closed condition, enter step 3.
Because even Men Gang closes, big change also appears in the dutycycle of air compressor motor 200, thus control device 70 be judged as by door switch 57 detect close the door after official hour, for example 5 minutes for not closing the door.In addition, because the dutycycle of compressor 20 is inappropriate in compressor 20 stops, in the Defrost operation, when carrying out the suction (aspirating freezing action of reclaiming with the cold-producing medium in the evaporimeter 16 with compressor 20) before the R cooling etc., so control device 70 does not detect dutycycle in the above-mentioned moment.
In step 3, judge whether refrigerating mode switched or whether the rotating speed of air compressor motor 200 changed.And, when the rotating speed of the switching of refrigerating mode and air compressor motor 200 does not all change (NO), enter step 4, as refrigerating mode etc. switching (YES) is arranged, then enter step 5.
In step 4, judge whether to have set reference duty cycle.Enter step 6 when being set with reference duty cycle, return step 2 when not setting reference duty cycle.By the processing of step 3 and 4, can prevent that compressor 20 is also unstable, for example when the refrigerator power connection, reference duty cycle be set.
In step 5, control device 70 detects the dutycycle of air compressor motor 200, is stored as reference duty cycle.This is because after switching refrigerating mode or the cause that changes the change that the dutycycle generation is very big behind the rotating speed of air compressor motor 200 thereby need reset reference duty cycle.This occasion, dutycycle instability after just having switched refrigerating mode or just having changed the rotating speed of air compressor motor 200.Therefore, will be after switching refrigerating mode or change behind the rotating speed of air compressor motor 200 through the stipulated time, for example the dutycycle after 2 minutes is stored as reference duty cycle.
In step 6, whether control device 70 decision gates 7 are in closed condition.And, when door 7 is in closed condition, then enter step 7.In step 7, control device 70 detects the dutycycle of air compressor motor 200.Reference duty cycle with detected dutycycle and step 5 storage compares then, (is .YES in step 8) when detected dutycycle increases than reference duty cycle, then enters step 9.
In step 9, control device 70 judge detected dutycycle with respect to the increment rate of reference duty cycle whether at setting, for example more than 10%.More than 10%, then enter step 10 as increment rate, as returning step 1 less than 10%.
In step 10, control device 70 stops the operation of high-tension electric component.Here, so-called high-tension electric component is meant that distribution cuts off and can produces the electric component of spark discharge when breaking down etc. that deodorization device 23 is equivalent to high-tension electric component in the present embodiment.
The rising of the dutycycle of air compressor motor 200 also can take place when the state of kind of refrigeration cycle becomes instability or when putting into the higher food of temperature etc. except when damage takes place for the low-pressure side of kind of refrigeration cycle.Therefore, only whether leak with the temporary transient rising of the dutycycle cold-producing medium that can not judge rightly.For this reason, in step 10, be in uncertain state, but still will make just in case cold-producing medium has the high-tension electric component of fire hazard when leaking stops although whether cold-producing medium takes place to leak.
Described deodorization device 23 has blast resistance construction, also can not catch fire even the cold-producing medium leakage takes place.But, in order further to guarantee safety it is stopped here.In addition, door opener 25 also is high-tension electric component, but is arranged on outside the case, leaks even cold-producing medium takes place, and the danger of catching fire is also little.And door opener 25 is different with deodorization device 23, and the user finds that easily it stops.Therefore, leak under the uncertain state and stop as whether cold-producing medium takes place, just in case cold-producing medium not the leakage meeting to user's sense of losing confidence.Therefore, in the present embodiment, do not stop door opener 25, to improve reliability.But, because of door opener 25 does not influence cooling performance, so can stop yet.
In step 11, judge whether compressor 20 abends.And, then enter step 12 as not abending, as be in the state that abends and then enter step 13.
In step 12, judge whether the switching of whether having passed through stipulated time (for example 1 hour) or refrigerating mode after the change detect dutycycle has reached stipulated number (for example 3 times).After leak taking place, cold-producing medium, returns step 1 through during the stipulated time or the switching of refrigerating mode when having reached stipulated number.On the other hand, the switching that leaks to through stipulated time or refrigerating mode from cold-producing medium reaches the stipulated number processing of repeating step 11 before.
As mentioned above, even there is change in the dutycycle of air compressor motor 200 under the state that cold-producing medium does not have to leak, but as long as will return stable status through the regular hour.But under the situation that actual generation cold-producing medium leaks, the dutycycle of air compressor motor 200 can continue to increase, and compressor 20 abends subsequently.
Therefore, even detect the change of dutycycle, if but under the situation that compressor 20 does not abend through the stipulated time, then being judged as is to damage, leak reason in addition and make dutycycle that change take place because of cold-producing medium takes place, and returns step 1.At this moment, remove the halted state of high-tension electric component.
On the other hand, in step 13, transfer valve 26 switched to full closing state after, air compressor motor 200 is stopped power supply.Here, damage has taken place in the low-pressure side that is judged as in kind of refrigeration cycle, carries out to be used to prevent the processing of cold-producing medium from the leakage of damage happening part.
In addition, the electric component beyond R fan 13, F fan 15, the C fan 19 stops.Thus, all got rid of the interior ignition cause of case.And, by the driving of R fan 13, F fan 15, C fan 19, just in case under the situation that cold-producing medium spills, can prevent that cold-producing medium is trapped in interior grade of storeroom and reaches inflammability limit concentration.In addition, each fan adopts blast resistance construction or brushless motor, not become the structure of the reason of catching fire.
In step 14, whether passed through for example 3 hours stipulated time after judging the processing begun step 13.And, as passed through 3 hours, then enter step 15, stop R fan 13, F fan 15, C fan 19, end process.After all processing that is through with, such information by having taken place to damage in display part 62 or the voice portion 61 report kind of refrigeration cycle in control device 70.
By contrast, when in step 8, being judged as detected dutycycle when not increasing (No), enter step 16 than reference duty cycle.
In step 16, control device 70 judge detected dutycycle with respect to the slip of reference duty cycle whether at setting for example more than 10%.And, more than 10%, then enter step 17 as slip, as returning step 1 less than 10%.
In step 17, control device 70 switches to full closing state with transfer valve 26, and stops air compressor motor 200, drives C fan 19 simultaneously.Here, damage has taken place in the high-pressure side that is judged as kind of refrigeration cycle, the processing that execution will promptly be spread from the cold-producing medium that the damage happening part spills.As mentioned above, this be because, when in the high-pressure side of kind of refrigeration cycle damage taking place, the cause that all spills at short notice of the cold-producing medium in the kind of refrigeration cycle then.
In step 18, whether passed through for example 8 minutes stipulated time after judging the processing begun step 17.As passed through 8 minutes, then enter step 19, restart common cooling operation.
Even in step 16, being judged as detected dutycycle is more than 10% with respect to the slip of reference duty cycle, and the high-pressure side that has detected kind of refrigeration cycle has taken place under the situation of damage, actual sometimes the damage.For this reason, control device 70 restarts common cooling operation after the processing (step 17) of having carried out the diffusion cold-producing medium, and end process.
By such structure, do not damage and stop to cool off the situation of operation for a long time although the high-pressure side of kind of refrigeration cycle can not occur.In addition, even just in case taken place in the high-pressure side of kind of refrigeration cycle under the situation of damage, the roughly all cold-producing mediums in the kind of refrigeration cycle all spill, do not restart to cool off the possibility of moving and the cold-producing medium that spills being caught fire so do not exist.
When damage takes place in the high-pressure side of kind of refrigeration cycle,, can not get cooling in the storage bin even restart the cooling operation.Therefore, because of the rising of the temperature inside the box, report has taken place unusual.
Step 10-15 in more than handling, step 17-19 are equivalent to survey the processing that prevents control device as flase drop.That is, control device 70 plays flase drop and surveys the effect that prevents control device.
By above explanation as can be known, adopt present embodiment, but earlier detection goes out the leakage of cold-producing medium in the kind of refrigeration cycle, even adopt the occasion of combustible refrigerant also can guarantee security as the cold-producing medium of kind of refrigeration cycle.
In addition, the position that takes place is in low-pressure side or the high-pressure side is judged to damaging in the kind of refrigeration cycle, carries out the processing corresponding to the damage happening part.Therefore, can avoid cold-producing medium to leak the danger that may cause when taking place reliably.
And, whether leak lasting cooling operation under the also uncertain state in the cold-producing medium reality of kind of refrigeration cycle, judge that cold-producing medium stops cooling and moves when leakage has taken place.Therefore, can avoid cooling off unnecessary the stopping of operation as much as possible, improve reliability.
But, the present invention is not limited to the above embodiments, for example can carry out following distortion.
Refrigerant leakage detecting device also can constitute: go out cold-producing medium according to the unusual temperature rise detection of the evaporimeter that constitutes kind of refrigeration cycle or compressor, condenser and from kind of refrigeration cycle the omen that leakage or cold-producing medium leak has taken place.In addition, also can be provided with and detect in the storeroom or the sensor of the refrigerant concentration in the Machine Room, detect the omen that leakage or cold-producing medium leakage have taken place from kind of refrigeration cycle cold-producing medium according to the testing result of the sensor.
The possibility of utilizing on the industry
As mentioned above, refrigerator of the present invention is little and the global greenhouse effect coefficient is little by adopting the ozone layer destroying coefficient Combustible refrigerant is useful as the refrigerator with kind of refrigeration cycle of having considered earth environment.
Claims (14)
1. refrigerator comprises:
Refrigerator body (1);
Be arranged on the storeroom (2,3,4,5) in the described refrigerator body;
The kind of refrigeration cycle that has compressor (20), condenser (27), evaporimeter (14,16) and enclose combustible refrigerant:
Be arranged on the high voltage electrical parts in the described refrigerator body (1);
Control device (70), described control device (70) cools off described storeroom by driving described compressor (20),
It is characterized in that, described control device (70) also is arranged to detect the omen that described cold-producing medium leaks from the low-pressure side of described kind of refrigeration cycle, and described control device continues to carry out the cooling operation when detecting the omen of described cold-producing medium leakage, temporarily stop simultaneously described high voltage electrical parts
The drive source of described compressor (20) is made of the motor (200) that carries out VFC by pulse width modulation,
Described control device reaches the situation more than the setting based on the dutycycle of described motor (200) with respect to the increment rate of reference duty cycle and detects cold-producing medium and is about to the omen of leaking.
2. refrigerator as claimed in claim 1 is characterized in that,
Described storeroom has refrigerating chamber (2) and refrigerating chamber (5),
Described kind of refrigeration cycle comprises: the refrigeration evaporimeter (14) that is used to cool off described refrigerating chamber (2); Be used to cool off the freezing of described refrigerating chamber (5) with evaporimeter (16); By mainly described cold-producing medium being reached the refrigerant flow path that mainly described cold-producing medium is constituted to described freezing the 2nd path of supplying with evaporimeter (16) to the 1st path that described refrigeration is supplied with evaporimeter (14); Switch the transfer valve (26) in the path of described cold-producing medium circulation,
Described control device is alternately carried out following 2 kinds of refrigerating modes, that is, and and by the refrigeration refrigerating mode of the action of described transfer valve (26) being controlled, made described cold-producing medium in described the 1st path, circulate, described refrigerating chamber is cooled off; The freezing refrigerating mode that makes described cold-producing medium in described the 2nd path, circulate, described refrigerating chamber is cooled off.
3. refrigerator as claimed in claim 1, it is characterized in that, described control device after described high voltage electrical parts are stopped through the stipulated time after, when described control device does not detect the omen that cold-producing medium be about to leak, remove stopping of described high voltage electrical parts.
4. refrigerator as claimed in claim 2, it is characterized in that, described control device is set at, after described high voltage electrical parts are stopped, after described control device has carried out the switching of stipulated number to refrigerating mode, when described control device does not detect the omen of described cold-producing medium leakage soon, remove stopping of described high voltage electrical parts.
5. refrigerator as claimed in claim 1 is characterized in that,
Have the electric component that is arranged in the described refrigerator body (1) and comprises fan assembly (13,15,19),
Described control device is set at, and makes described high voltage electrical parts stop the back to through the stipulated time, when described control device detects described cold-producing medium and leaks the omen that is about to, stops the electric component beyond the described fan assembly.
6. refrigerator as claimed in claim 2 is characterized in that,
Have the electric component that is arranged in the described refrigerator body (1) and comprises fan assembly (13,15,19),
Described control device is set at, extremely described cooling running gear carries out between the switching of stipulated number to refrigerating mode after described high voltage electrical parts are stopped, when described control device detects the omen of described cold-producing medium leakage soon, stop described fan assembly (13,15,19) electric component in addition.
7. refrigerator as claimed in claim 1 is characterized in that,
Have the door (6) that is arranged on the described refrigerator body (1) and is used to open and close described storeroom,
Be under the closed condition at described door (6), described control device has passed through the dutycycle setting reference duty cycle of the described motor (200) after the stipulated time after changing according to the rotating speed of described motor (200).
8. refrigerator as claimed in claim 1 is characterized in that,
Have the door (6) that is arranged on the described refrigerator body (1) and is used to open and close described storeroom,
Described control device is set at, be in the increment rate of the dutycycle of the described motor (200) under the closed condition according to described door (6), detect cold-producing medium and whether be about to the omen that leakage or cold-producing medium leak to have taken place from the low-pressure side of kind of refrigeration cycle with respect to described reference duty cycle.
9. refrigerator as claimed in claim 2 is characterized in that,
Described control device is set at, according to setting reference duty cycle through the dutycycle of the described motor (200) after the stipulated time behind the described control device switching refrigerating mode, simultaneously based on the dutycycle of described motor (200) increment rate, detect described cold-producing medium and be about to the omen of leaking from the low-pressure side of kind of refrigeration cycle with respect to described reference duty cycle.
10. refrigerator comprises:
Refrigerator body (1);
Be arranged on the storeroom (2,3,4,5) in the described refrigerator body;
The kind of refrigeration cycle that has compressor (20), condenser (27), evaporimeter (14,16) and enclose combustible refrigerant;
Be used to distribute the radiator fan (19) of the heat of described compressor (20) or described condenser (27);
Control device (70), described control device (70) cools off described storeroom by driving described compressor (20), it is characterized in that described control device (70) also is arranged to:
Detect situation that described cold-producing medium leaked from the high-pressure side of described kind of refrigeration cycle or described cold-producing medium and be about to the omen of leaking;
Described control device stops the operation of described compressor (20) and makes described radiator fan (19) restart the operation of described compressor (20) after the rotation stipulated time when detecting the omen that situation that cold-producing medium leaked or cold-producing medium be about to leak.
11. refrigerator as claimed in claim 10 is characterized in that,
The drive source of described compressor (20) is made of the motor (200) that carries out VFC by pulse width modulation,
Described control device is based on the dutycycle of described motor (200) reduction rate with respect to reference duty cycle, detects situation that described cold-producing medium leaking from the high-pressure side of kind of refrigeration cycle or described cold-producing medium and is about to the omen of leaking.
12. refrigerator as claimed in claim 11 is characterized in that,
Have the door (6) that is arranged on the described refrigerator body (1) and is used to open and close described storeroom,
Be under the closed condition at described door (6), described control device has passed through the dutycycle setting reference duty cycle of the described motor (200) after the stipulated time after changing according to the rotating speed of described motor (200).
13. refrigerator as claimed in claim 11 is characterized in that,
Have the door (6) that is arranged on the described refrigerator body (1) and is used to open and close described storeroom,
Described control device is in the described motor (200) under the closed condition based on described door dutycycle detects situation that described cold-producing medium leaking from the high-pressure side of described kind of refrigeration cycle or described cold-producing medium with respect to the reduction rate of described reference duty cycle and is about to the omen of leaking.
14. refrigerator as claimed in claim 11 is characterized in that,
Described storeroom has refrigerating chamber (2) and refrigerating chamber (5),
Described kind of refrigeration cycle comprises: the refrigeration evaporimeter (14) that is used to cool off described refrigerating chamber (2); Be used to cool off the freezing of described refrigerating chamber (5) with evaporimeter (16); By the 1st path from evaporimeter to described refrigeration and the main refrigerant flow path that described cold-producing medium is constituted to described freezing the 2nd path of supplying with evaporimeter mainly described cold-producing medium supplied with; Switch the transfer valve (26) in the path of described cold-producing medium circulation,
Described control device is alternately carried out following 2 kinds of refrigerating modes, that is, and and by the refrigeration refrigerating mode of the action of described transfer valve (26) being controlled, made described cold-producing medium in described the 1st path, circulate, described refrigerating chamber (2) is cooled off; The freezing refrigerating mode that makes described cold-producing medium in described the 2nd path, circulate, described refrigerating chamber (5) is cooled off,
Described control device is set at, set reference duty cycle according to after switching refrigerating mode at described cooling running gear through the dutycycle of the described motor (200) after the stipulated time, simultaneously based on the dutycycle of described motor (200) slip, detect situation that cold-producing medium leaking from the high-pressure side of described kind of refrigeration cycle or cold-producing medium and be about to the omen of leaking with respect to described reference duty cycle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002236226A JP2004077000A (en) | 2002-08-14 | 2002-08-14 | Refrigerator |
| JP236226/2002 | 2002-08-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1675510A CN1675510A (en) | 2005-09-28 |
| CN100370198C true CN100370198C (en) | 2008-02-20 |
Family
ID=31884402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038192969A Expired - Fee Related CN100370198C (en) | 2002-08-14 | 2003-08-11 | Refrigerator |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2004077000A (en) |
| KR (1) | KR100639716B1 (en) |
| CN (1) | CN100370198C (en) |
| TW (1) | TW574493B (en) |
| WO (1) | WO2004016999A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3963190B2 (en) | 2005-04-07 | 2007-08-22 | ダイキン工業株式会社 | Refrigerant amount determination system for air conditioner |
| CN101469928B (en) * | 2007-12-26 | 2011-07-27 | 财团法人工业技术研究院 | Energy-saving control method and apparatus |
| DE202008009956U1 (en) | 2008-04-15 | 2009-08-20 | Liebherr-Hausgeräte Lienz Gmbh | Fridge and / or freezer |
| JP2009264660A (en) * | 2008-04-24 | 2009-11-12 | Toshiba Corp | Refrigerator |
| JP2010203658A (en) * | 2009-03-03 | 2010-09-16 | Hitachi Appliances Inc | Ice supply device and refrigerator including the ice supply device |
| JP2011021851A (en) * | 2009-07-17 | 2011-02-03 | Toshiba Carrier Corp | Refrigerating cycle |
| JP5619664B2 (en) * | 2011-03-31 | 2014-11-05 | ホシザキ電機株式会社 | Ice machine |
| JP5766006B2 (en) * | 2011-04-26 | 2015-08-19 | ホシザキ電機株式会社 | How to operate an ice machine |
| CN105308395B (en) * | 2013-06-18 | 2018-01-23 | 三菱电机株式会社 | Refrigerating plant |
| JP5812081B2 (en) * | 2013-11-12 | 2015-11-11 | ダイキン工業株式会社 | Indoor unit |
| JP6825336B2 (en) * | 2016-11-30 | 2021-02-03 | ダイキン工業株式会社 | Refrigeration equipment |
| KR102418005B1 (en) | 2017-08-28 | 2022-07-07 | 삼성전자주식회사 | Refrigerator and controlling method thereof |
| JP7085405B2 (en) * | 2018-05-15 | 2022-06-16 | 三菱重工サーマルシステムズ株式会社 | Heat source system, control device, heat source system operation method and program |
| US11662128B2 (en) | 2018-07-09 | 2023-05-30 | Crane Payment Innovations, Inc. | Refrigerant leak detector for a vending machine |
| CN112739964A (en) | 2018-09-06 | 2021-04-30 | 开利公司 | Refrigerant leak detection system |
| JP7215919B2 (en) * | 2019-02-07 | 2023-01-31 | ホシザキ株式会社 | cold storage |
| JP7201466B2 (en) * | 2019-02-07 | 2023-01-10 | ホシザキ株式会社 | cold storage |
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| CN1180823A (en) * | 1996-10-18 | 1998-05-06 | 松下电器产业株式会社 | Refrigerating apparatus |
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| JP2002005548A (en) * | 2000-06-19 | 2002-01-09 | Mitsubishi Electric Corp | Household electrical appliance in which combustible refrigerant is used |
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- 2002-08-14 JP JP2002236226A patent/JP2004077000A/en active Pending
-
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- 2003-03-21 TW TW92106362A patent/TW574493B/en not_active IP Right Cessation
- 2003-08-11 KR KR1020057002439A patent/KR100639716B1/en not_active IP Right Cessation
- 2003-08-11 CN CNB038192969A patent/CN100370198C/en not_active Expired - Fee Related
- 2003-08-11 WO PCT/JP2003/010237 patent/WO2004016999A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5671775A (en) * | 1979-11-16 | 1981-06-15 | Nippon Denso Co | Refrigerating plant |
| CN1180823A (en) * | 1996-10-18 | 1998-05-06 | 松下电器产业株式会社 | Refrigerating apparatus |
| JP2001093039A (en) * | 1999-09-22 | 2001-04-06 | Sanden Corp | Automatic vending machine |
| JP2001116419A (en) * | 1999-10-22 | 2001-04-27 | Matsushita Refrig Co Ltd | Refrigerator |
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| JP2001355955A (en) * | 2001-05-11 | 2001-12-26 | Matsushita Refrig Co Ltd | Refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200402523A (en) | 2004-02-16 |
| WO2004016999A1 (en) | 2004-02-26 |
| KR100639716B1 (en) | 2006-11-01 |
| JP2004077000A (en) | 2004-03-11 |
| KR20050042153A (en) | 2005-05-04 |
| TW574493B (en) | 2004-02-01 |
| CN1675510A (en) | 2005-09-28 |
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