CN1818521A

CN1818521A - Refrigerator

Info

Publication number: CN1818521A
Application number: CNA2006100037694A
Authority: CN
Inventors: 野口好文; 天明稔; 仁木茂; 塚本惠造
Original assignee: Toshiba Corp; Toshiba Consumer Marketing Corp; Toshiba Home Appliances Corp
Current assignee: Toshiba Corp; Toshiba Lifestyle Products and Services Corp
Priority date: 2005-02-10
Filing date: 2006-02-09
Publication date: 2006-08-16
Anticipated expiration: 2026-02-09
Also published as: CN100417883C; JP4461038B2; JP2006220377A; KR100691587B1; TWI315385B; KR20060090754A; TW200632264A

Abstract

A refrigerator, coolers (7, 9) for exclusively cooling freezing and refrigerating spaces respectively, and cool air circulating fans (8, 10) are provided, cooling is performed by alternately switching the refrigerant passage to the coolers for freezing and refrigeration by a passage switching valve (14). and when switching the refrigerant passage from the cooler (7) for freezing to the cooler (9) for refrigeration, the refrigerator is operated in a refrigeration cooling mode after operating both coolers in a simultaneous cooling mode. When operating the refrigerator in the simultaneous cooling mode, if a temperature difference between the refrigerant entrance and exit parts of the cooler for refrigeration is not more than a prescribed value, passage resistance to the cooler for refrigeration is made large, and if it is not less than the prescribed value, the passage resistance is made small. Abnormal noise is prevented from generating, by performing highly efficient cooling operation by reducing a cooling loss due to refrigerant delay caused when switching a passage, when switching operation from cooling operation of a freezing side circuit to a refrigeration side circuit by a refrigerant passage switching device such as a three way valve, and by supplying well-balanced flow of the refrigerant to respective coolers for freezing and refrigeration.

Description

Refrigerator

Technical field

The present invention relates to a kind of refrigerator, it is provided with respectively specially cooler that keep in cold storage space and refrigerating space are cooled off and the fan that cold air is circulated, and by flow channel switching valve described freezing and refrigeration storage space is replaced cooling.

Background technology

Fig. 8 represents the kind of refrigeration cycle of current refrigerator, as the compressor 12 that cold-producing medium is compressed, discharges, the compressor of use ability type variable, the refrigerant flow path switching device shifter that constitutes with condenser 13, by triple valve 14, the 1st throttling arrangement 15 and refrigeration are connected with compressor 12 with cooler 9, with the 2nd throttling arrangement 16 with freezingly be connected in parallel formation kind of refrigeration cycle 20 with cooler 9 with described the 1st throttling arrangement 15 and refrigeration with cooler 7, accumulator 17 and check valve 18.

And, according to refrigerating chamber, the detected temperatures of the temperature sensor that the indoor temperature of refrigerating chamber detects, utilize described flow passage selector device 14 refrigerant flow path alternately to be switched to the refrigeration side loop 21 that constitutes with cooler 9 by the 1st throttling arrangement 15 and refrigeration, and by the 2nd throttling arrangement 16 and freezing with cooler 7, the freezing side loop 22 that accumulator 17 and check valve 18 are constituted turns round, by being provided in described cooler 7 separately, near the rotation of the circulating cold air fan 9, control is independently alternately cooled off in refrigerating chamber space and refrigerating chamber space respectively, and turning round from the cooling of freezing side loop 22 when the cooling running of refrigeration side loop 21 is switched, make at certain hour and close triple valve 14, to refrigeration side loop 21 and freezing side loop 22 state of flow system cryogen not, so-called pumping operation by running compressor 12, attract to be stranded in the cold-producing medium in the cooler, guarantee that to the circulating mass of refrigerant of refrigeration with

cooler

9,21 pairs of refrigerating spaces of refrigerant flow direction refrigeration side loop cool off then.

Adopt this pumping operation, be stranded in the cold-producing medium of the cooler 7 of low-pressure side from triple valve 14 attractions, pressure is transferred to it to be on high-tension side condenser 13, after the suction, cold-producing medium is supplied in refrigeration rapidly with cooler 9, therefore has the advantage that keeps circulating mass of refrigerant, can improve the cooling effectiveness of refrigerating space.

In addition, shown in Figure 9 as patent documentation 1 record of this case patent applicant application, turn round when the running of refrigeration side loop is switched in the cooling of freezing side loop from the refrigeration cycle structure that constitutes by aforementioned same refrigeration cycle structure, opposite with aforementioned example in the past, by with the flow passage selector device standard-sized sheet, cold-producing medium flows in the both sides of freezing side loop and refrigeration side loop, the refrigerant amount of regulation is stored in switches to the refrigerating chamber cooling behind the refrigerating chamber side loop, just can not postpone at the beginning cold-producing medium not taking place.

Patent documentation 1: TOHKEMY 2002-267312 communique.

But, itself not only is unprofitable to indoor cooling the pumping operation of described example in the past, and be the occasion of high temperature the or when rotating speed of compressor 12 is higher when high temperature food put into case etc. in the environment temperature of refrigerating box, if carry out pumping operation with this rotating speed like this, then cool off running and triple valve 14 is switched to the occasion that refrigerates side loop 21 in order to refrigerate side behind pumping operation, the cold-producing medium that is stored in condenser 13 by pumping operation just is pressed in the refrigeration usefulness cooler 9 that is in the space state in large quantities by high-revolving compressor 12.Its result, the rapid change of flow of refrigerant sound becomes noise greatly, in addition, has the problem that the user is not acoustically being felt well because of intermittent flow of refrigerant abnormal noise.

In addition, adopt patent documentation 1, though can prevent that when the cooling running of freezing side loop switches to the running that refrigerates side loop refrigeration taking place uses the cold-producing medium of cooler to postpone, but because cold-producing medium flows in freezing and refrigeration side loop both sides, so refrigerating capacity descends, to the loading condiction in some refrigerating chamber, exist the time of cooling running simultaneously to be with elongated, inefficient shortcoming.And, towards the refrigerant flow path of refrigeration with cooler, its flow path resistance is set than little towards freezing refrigerant flow path with cooler, when using the refrigeration refrigerating mode that flows in the cooler only to refrigerate at cold-producing medium, under high evaporating temperature, turn round, therefore, when cold-producing medium is mobile towards both sides, exist more cold-producing medium towards the problem of refrigeration with the cooler side flow.

Summary of the invention

In view of the above problems, the object of the present invention is to provide a kind of like this refrigerator: turn round when the running of refrigeration side loop is switched in the cooling that refrigerant flow path switching device shifters such as triple valve are carried out from freezing side loop, thereby the cooling loss that cold-producing medium postpones to be produced when reducing the stream switching carries out high efficiency cooling running, cold-producing medium is suitably flowed to each cooler of freezing usefulness and refrigeration usefulness, prevent the generation of abnormal noise.

For achieving the above object, the refrigerator of technical solution of the present invention 1 is, be provided with respectively specially to keep in cold storage space and refrigeration storage space cool off freezing with cooler and refrigeration with cooler and cooling fan that cold air is circulated, by flow channel switching valve with refrigerant flow path alternately switch to described freezing with cooler and refrigeration cool off with cooler, and with refrigerant flow path from freezing with cooler when refrigeration is switched with cooler, when flowing, both sides' cooler carries out the running of refrigerating space refrigerating mode after the refrigerating mode running at cold-producing medium, when refrigerating mode turns round at the same time, if the temperature difference that refrigerates the refrigerating fluid discharging and feeding portion that uses cooler is smaller or equal to setting, then increase to the flow path resistance of refrigeration with cooler, if more than or equal to setting, then reduce this flow path resistance, the refrigerator of technical solution of the present invention 2 is, be provided with respectively specially to keep in cold storage space and refrigeration storage space cool off freezing with cooler and refrigeration with cooler and cooling fan that cold air is circulated, by flow channel switching valve with refrigerant flow path alternately switch to described freezing with cooler and refrigeration cool off with cooler, and from freezing with cooler when refrigeration is switched refrigerant flow path with cooler, when flowing, both sides' cooler carries out the running of refrigerating space refrigerating mode after the refrigerating mode running at cold-producing medium, littler than freezing flow path resistance towards refrigeration with cooler with the flow path resistance of cooler, when refrigerating mode turned round at the same time, the flow path resistance when refrigeration uses the flow path resistance ratio of cooler to turn round usually was big.

Adopt structure of the present invention, because exercise freezing by advancing in the cooling running of refrigeration side and refrigeration side cooling circuit circulation cold-producing medium in the refrigerating mode running, make cold-producing medium be stranded in the refrigeration cooler, therefore can when refrigeration side cooling running beginning, rapidly cold-producing medium be supplied in the refrigeration cooler, can eliminate the cooling loss that the cold-producing medium delay is caused, and balancedly make refrigerant flow direction freezing with cooler and refrigeration use cooler, acquisition can improve the advantage of cooling effectiveness.In addition, the flow of refrigerant noise in the time of can eliminating refrigeration side cooling running beginning can reduce the user to the sense of discomfort of abnormal noise takes place.

Description of drawings

Fig. 1 is the running when control figure of the refrigerator of the expression embodiment of the invention 1.

Fig. 2 is the longitudinal section of the general refrigerator of expression.

Fig. 3 is the kind of refrigeration cycle skeleton diagram of expression while refrigerating mode state of the present invention.

Fig. 4 is the kind of refrigeration cycle skeleton diagram of the refrigeration refrigerating mode of presentation graphs 3.

Fig. 5 is the kind of refrigeration cycle skeleton diagram of the refrigeration refrigerating mode of presentation graphs 3.

Fig. 6 is the kind of refrigeration cycle skeleton diagram of expression with respect to the refrigerator of other embodiment of Fig. 3.

The refrigeration cyclic graph of the pumping operation when Fig. 7 is a presentation graphs 3 after the refrigerating mode.

Fig. 8 represents the skeleton diagram of the kind of refrigeration cycle of refrigerator in the past.

Fig. 9 is the running when control figure of refrigerator in the past.

The specific embodiment

One embodiment of the invention are described below with reference to the accompanying drawings.Fig. 2 is the longitudinal section of refrigerator, the inside of the refrigerator body 1 that will be formed by heat insulating box is as storage space, respectively independently at topmost configuration refrigerating chamber 2, configuration vegetable compartment 3 below refrigerating chamber 2, at foot configuration refrigerating chamber 4, being set up in parallel automatic ice-making chamber 5 and not shown many temperature switchings chamber about by heat insulation partition wall between refrigerating chamber 2 and the vegetable compartment 3, in the front openings of each storeroom, be respectively equipped with special-purpose door 6, freely it sealed to open and close.

The fan 8 that cooler of using in the spaces that keeps in cold storage such as the rear portion of refrigerating chamber 4 configuration refrigerating chamber and ice-making compartments 7 and the cold air that this cooler 7 is generated by pipeline circulate in storeroom, refrigeration storage space that refrigerating chamber 2 and vegetable compartment 3 are cooled off is set with cooler 9 and fan 10 at the back side of refrigerating chamber 2, driving by the coolant compressor 12 in the Machine Room 11 that is arranged on the body bottom, utilize the rotation of

fan

8,10 to be sent to each storeroom, and they are cooled off separately be controlled at set point of temperature by described cooler 7,9 cooled cold air.

As shown in Figure 3, described each storeroom is by kind of refrigeration cycle 20 coolings, this kind of refrigeration cycle 20 is following structures: from the compressor 12 that the refrigerant gas of HTHP is discharged, condenser 13 with refrigerant gas heat radiation liquefaction, thereby the be connected in series refrigeration of the 1st throttling arrangement 15 and high temperature side forms the loop of returning described compressor 12 with cooler 9 as the triple valve 14 of the switching device shifter of refrigerant flow path, simultaneously, from described triple valve 14 freezing side loop 22 is connected in parallel with refrigeration side loop 21, wherein said refrigeration side loop 21 is made of the cooler 9 of described the 1st throttling arrangement 15 and high temperature side, and described freezing side loop 22 is in order with freezing the use cooler 7 of the 2nd throttling arrangement 16 with low temperature side, accumulator 17 and check valve 18 are formed by connecting.

Each pipe arrangement of this kind of refrigeration cycle 20 is connected to form circulation separately in described Machine Room 11, as cold-producing medium, enclosed can not damage the ozone layer, the global warming coefficient is low but be the HC cold-producing medium of hydro carbons such as flammable iso-butane.

And, detected temperatures according to the not shown temperature sensor that is located at refrigerating chamber 2 and refrigerating chamber 4 etc., by described triple valve 14 stream is alternately switched to refrigeration side loop 21 or freezing side loop 22, cool off running to supply with cold-producing medium, and refrigeration side loop 21 has the 1st throttling arrangement 15 and refrigeration cooler 9, freezing side loop 22 has the 2nd throttling arrangement 16, freezing with cooler 7, accumulator 17 and check valve 18, simultaneously, by being configured in described freezing usefulness cooler 7 respectively and refrigerating with near the fan 8 the

cooler

9,10 rotation is to the refrigeration storage space of the refrigerating chamber 2 of high temperature side and vegetable compartment 3 etc., and the spaces that keep in cold storage such as the refrigerating chamber 4 of low temperature side and automatic ice-making chamber 5 are cooled off independently of one another and are controlled to set point of temperature.

The Fig. 4 that the part identical with Fig. 3 is put on identical symbol represents that described refrigeration side loop 21 cools off the kind of refrigeration cycle of the refrigeration refrigerating mode of running, by cooling off the alternately cooling running that the freezing refrigerating mode of running is hocketed to this refrigeration refrigerating mode with the represented freezing side loop 22 of the kind of refrigeration cycle of the same Fig. 5 of Fig. 4, thereby alternately cooling of storage space with the both sides of refrigerated storage temperature band and cryogenic temperature band, when both sides' storage space all is cooled to set point of temperature, compressor 12 stops, because of rising, the storage indoor temperature make any storeroom temperature be higher than the occasion of design temperature then, make compressor 12 and fan 8 once more, 10 startings are cooled off this storage space circulation cold air.

As Fig. 1 the time figure shown in, the control of described cooling running is to carry out corrected Calculation according to the operating condition of the detected temperatures of the storeroom temperature sensor that is configured in described refrigerating space and reefer space respectively and the design temperature in the storeroom separately, the compressor 12 in its running moment and

fan

8,10 rotating speeds etc., utilize indoor thermic load to make refrigerating capacity variable, and with freezing refrigerating mode and refrigeration refrigerating mode to the hocket cooling running of keep in cold storage space and refrigerating space.

In addition, under the state of described freezing refrigerating mode, the cold-producing medium evaporating temperature is the temperature lower than reefer space temperature.On the contrary, the refrigeration that is located at refrigerating chamber 2 back sides is more than or equal to 0 ℃ with the environment temperature of cooler 9, and refrigeration is with just evaporation of the cold-producing mediums in the cooler 9, so be in the state that does not have liquid refrigerant.

Therefore, promptly use triple valve 14 to switch to from this state and make the refrigeration refrigerating mode of cold-producing medium in 21 circulations of refrigeration side loop, cold-producing medium in the described freezing side loop 22 also still is stored in freezing with in cooler 7 and the accumulator 17, correspondingly make and be used for cooling refrigeration with the short of refrigerant of cooler 9, refrigeration after just the having switched interior no cold-producing medium of the pipe of cooler 9, therefore, the inflow of the cold-producing medium that helps cooling off postpones, thereby cooling effect postpones.

For preventing that cold-producing medium from postponing, turning round when refrigeration side loop 21 turns round switching from the cooling of freezing side loop 22, with the 14 standard-sized sheet stipulated times of triple valve, as shown in Figure 3, refrigerating side loop 21 still is that freezing side loop 22 all makes the state that makes flow of refrigerant, and refrigerating mode running when implementing to make compressor 12 runnings is after the described stipulated time, by triple valve 14 the flow of refrigerant loop is switched to refrigeration side loop 21, refrigerate the cooling of storage space.

At this moment, the 1st throttling arrangement 15 that constitutes by capillary that is connected with 9 in cooler in triple valve 14 and refrigeration because of its flow path resistance than freezing the 2nd throttling arrangement 16 little cold-producing mediums that flow into easily with cooler 7 sides.And, after stream has just switched, because the refrigeration temperature height of cooler 9, so the cold-producing medium that flows into seldom flow to cooler 9 outlets because of promoting evaporation, but As time goes on, liquid refrigerant just increases gradually and flows, and in the stage after near the stipulated time that fully flows to the export department, refrigerant flow path is switched to the refrigeration refrigerating mode.

As mentioned above, when switching to the refrigeration refrigerating mode from freezing refrigerating mode, refrigerating mode when cold-producing medium being flowed in refrigeration side loop 21 and freezing side loop both sides by insertion, thereby can reduce cooling loss and carry out high efficiency cooling running, cold-producing medium behind the elimination pumping operation in the past when the cooling of refrigeration side is switched postpones, and can prevent the noise of flow of refrigerant generation.

The purpose of refrigerating mode running simultaneously is to realize by the cold-producing medium of the necessary amount that flows in refrigerating with cooler 9, its duration of runs is preferably short as far as possible, therefore, in the present invention, at the entrance and exit that refrigerates with cooler 9

temperature sensor

23,24 is set, its temperature is measured, thereby detect the cold-producing medium inflow situation of refrigeration with cooler 9 inside, in the temperature difference moment littler, finish refrigerating mode simultaneously than setting.

That is, just after the while, refrigerating mode switched, though refrigeration with the temperature step-down of cooler 9 inlets because the cold-producing medium influx is insufficient, so become the superheat state of being evaporated in the cooler tube of export department, the temperature of export department does not reduce.When refrigeration with the refrigerant amount in the cooler 9 in time passing and when becoming abundant, because the superheating phenomenon of export department disappears, so by detecting this low temperature and detecting and the temperature difference of inlet temperature between mutually, thereby as the time that switches to refrigeration refrigerating mode running from the while refrigerating mode, be in promptly 40～60 minutes duration of runs about 5 minutes of the freezing and refrigeration of about 1 circulation the duration of runs of refrigerating mode in the time of above-mentioned.

Be controlled to this moment, and the temperature difference of the

temperature sensor

23,24 of gateway increases the refrigerant flow path resistance during less than certain value, and temperature difference reduces flow path resistance during greater than certain value.

Originally, as described in above-mentioned embodiment, with in freezing side loop 22 and the circulation in parallel that is connected in parallel of refrigeration side loop 21, by improving the evaporating temperature of refrigeration refrigerating mode, can improve cycle efficieny, therefore, refrigeration is made the mild throttling degree littler than the 2nd throttling arrangement 16 of freezing usefulness cooler 7 sides with the flow path resistance of the 1st throttling arrangement 15 of cooler 9 sides.And under this state, when entering into described while refrigerating mode running, cold-producing medium does not flow into the big freezing side loop 22 of flow path resistance, only flows into the little refrigeration side loop 21 of resistance.In addition, when a large amount of flow of refrigerant, cold-producing medium has little time whole evaporations in the refrigeration side loop 21 of no accumulator usually, and the problem that liquid refrigerant returns the phenomenon of compressor 12 that takes place is arranged.

Therefore, at the same time in the refrigerating mode running, must prevent that cold-producing medium from too much flowing with cooler 9 to refrigeration, cold-producing medium is balancedly flowed freezing using among the both sides of cooler 9 with cooler 7 and refrigeration, for this reason, the throttling degree of the 1st throttling arrangement 15 of the adjustable restraining cryogen refrigeration side loop 21 that is more prone to flow.

The throttling of the 1st throttling arrangement 15 is regulated as has similarly been put on symbol as shown in Figure 6 with aforementioned, the switching device shifter of refrigerant flow path is the cold-producing medium control valve 25 of configuration automatic expansion valve etc. on the stream in triple valve 14 downstreams in refrigeration side loop 21, be located at the temperature difference of refrigeration by detection with the

temperature sensor

23,24 of refrigerant inlet in the cooler 9 and export department, thereby set the valve opening of cold-producing medium control valve 25 for setting according to temperature difference, the refrigerant amount that flows in throttling arrangement 15 is controlled.

Promptly, when refrigeration uses the refrigerant inlet of cooler 9 to equate with outlet temperature, because the refrigerant amount that expression is flowed is too much, liquid state is returned compressor 12, so with the throttling about 5～20% when common of the aperture of cold-producing medium control valve 25, flow path resistance is adjusted to refrigeration becomes the weak overheated state higher 2～4 ℃ than entrance side with the temperature of the outlet side of cooler 9.

On the contrary, when inlet and outlet side temperature difference are big, because lack of refrigerant becomes superheat state, so enlarge the aperture of cold-producing medium control valve 25, reduce flow path resistance, be adjusted to weak superheat state as hereinbefore, by making this structure, can prevent that cold-producing medium from postponing the cooling loss produced, and liquid state can not take place return, can make cold-producing medium balancedly freezing with cooler 7 and refrigeration with flowing in the cooler 9.

In described embodiment, by measuring inlet and the outlet temperature of refrigeration with cooler 9, regulate to the refrigerant flow path resistance of refrigeration with cooler 9, but be not limited to this, also can to a certain degree flow path resistance be done and fix under the big state and cold-producing medium is flowed in both sides'

cooler

7,9 with certain hour.At this moment, within a certain period of time, be adjusted to the liquid refrigerant underfill to the refrigerant flow path resistance of refrigeration, or set flow path resistance determines that then cold-producing medium flows in both sides' cooler 7,9 time in advance with cooler 9 outlets.

Adopt said structure, be controlled to while refrigerating mode running proceeded to liquid refrigerant and is filled the moment of refrigeration with cooler 9 exits till, can not need the

temperature sensor

23,24 that refrigeration is measured with the temperature of cooler 9.

In addition, in the above-described embodiments, cold-producing medium control valve 25 is made other parts, but and be limited to this, also export department's opening of the triple valve 14 that can switch in flow path forms flow control mechanism.

As previously mentioned, with triple valve 14 standard-sized sheets, carry out cold-producing medium in refrigeration side and freezing

side loop

21,22 both sides, flow in the refrigerating mode running during, with after this refrigerant flow path is switched to the refrigeration refrigerating mode that carried out of refrigeration side loop 21 and compares, the evaporating temperature of cold-producing medium is because of freezing cooler 7 step-downs of using along low pressure, the refrigerating efficiency step-down, simultaneously because cold-producing medium is mobile in freezing side and refrigeration side both sides, tail off with the refrigerant amount of cooler 9 so flow to refrigeration, as the refrigerating capacity of refrigerator integral body with regard to step-down.

Therefore, in the refrigerating mode running simultaneously, for the decline of tackling refrigerating capacity and usually the rotation of either party's fan becomes the rotations of 2

fans

8,10 of freezing and refrigeration usefulness the time, so the rotating speed freezing and

fan

8,10 that the refrigeration cooler is used is controlled to the slow-speed of revolution, for example be controlled to 40～70% when common, by making the slow-speed of revolution, but just freezing-inhibiting refrigeration both sides'

fan

8,10 is rotated the noise that is produced and increases.

In addition, for the duration of runs that shortens described while refrigerating mode and the decline of tackling aforesaid refrigerating capacity, also can be by increasing the rotating speed of compressor 12, the cooling capacity that keeps freezing and refrigerating space, during this time, making common rotating speed with 50Hz～76Hz compressor driven 12 increase about 20～50% turns round.

In addition, in the described while refrigerating mode, also can help the rotating speed of the radiator fan 19 that dispels the heat to be provided with to such an extent that be higher than common rotating speed, improve refrigerating capacity, shorten the duration of runs of refrigerating mode simultaneously the compressor 12 that is located at Machine Room 11 and condenser 13 are cooled off.

Also suction mode can be set, when the described while, the refrigerating mode running finished, as shown in Figure 7, under the state that compressor 12 remains in operation by closing refrigerant flow path transfer valve 14, cut off cold-producing medium circulation, the cold-producing medium of kind of refrigeration cycle low-pressure side is reclaimed to freezing side loop 22 and refrigeration side loop 21.

As mentioned above, in the past when switching to the refrigeration refrigerating mode from freezing refrigerating mode, flow channel switching valve 14 is closed, the compressor 12 that descends to pass through to turn round is in off position implemented the pumping operation with the refrigerant-recovery of low-pressure side, but the present invention is before it, refrigerating mode when cold-producing medium being set in freezing side loop 22 and refrigeration side loop 21 both sides, flowing, compare with previous methods, by freezingly aspirating under with the refrigerant amount less state in the cooler 7 being stranded in, just can carry out refrigerant-recovery at short notice.

Therefore, can shorten the useless time that is unprofitable to the storage space cooling is the duration of runs of refrigerant-recovery pattern, can switch to the refrigeration refrigerating mode fast.Because the cold-producing medium inhalation power of refrigerant-recovery time with compressor 12 changes, therefore, when reclaiming cold-producing medium, change by the rotating speed that makes compressor, for example rotating speed is that the occasion of 25rps made 90 seconds, rotating speed is that the occasion of 75rps made 45 seconds, thereby can carry out best refrigerant-recovery.

When described pumping operation, the rotating speed of compressor 12 can not drop to middling speed as shown in Figure 1 yet, and be still rotating speed when cooling off simultaneously, freezingly turn round with low speed in the present embodiment with fan 8, freezing to promote with the refrigerant-recovery in the cooler 7, but be not limited to this, also can make freezingly to stop with fan 8.

The present invention can be used in and be provided with cooler that keep in cold storage space and refrigeration storage space are cooled off respectively specially and the fan that cold air is circulated, and by flow channel switching valve refrigerant flow path is alternately switched to the described freezing refrigerator that cools off with cooler with cooler and refrigeration.

Claims

1. refrigerator, it is characterized in that, be provided with respectively specially to keep in cold storage space and refrigeration storage space cool off freezing with cooler and refrigeration with cooler and cooling fan that cold air is circulated, by flow channel switching valve with refrigerant flow path alternately switch to described freezing with cooler and refrigeration cool off with cooler, with refrigerant flow path from freezing with cooler when refrigeration is switched with cooler, when flowing, cold-producing medium carries out the running of refrigerating space refrigerating mode after the refrigerating mode running in both sides' cooler, when refrigerating mode turns round at the same time, if the temperature difference that refrigerates the refrigerating fluid discharging and feeding portion that uses cooler is smaller or equal to setting, then increase to the flow path resistance of refrigeration with cooler, if more than or equal to setting, then reduce this flow path resistance.

2. refrigerator, it is characterized in that, be provided with respectively specially to keep in cold storage space and refrigeration storage space cool off freezing with cooler and refrigeration with cooler and cooling fan that cold air is circulated, by flow channel switching valve with refrigerant flow path alternately switch to described freezing with cooler and refrigeration cool off with cooler, with refrigerant flow path from freezing with cooler when refrigeration is switched with cooler, when flowing, cold-producing medium carries out the running of refrigerating space refrigerating mode after the refrigerating mode running in both sides' cooler, make to refrigeration littler than freezing flow path resistance with cooler with the flow path resistance of cooler, when refrigerating mode turns round at the same time, make the flow path resistance when refrigeration uses the flow path resistance ratio of cooler to turn round usually big.

3. refrigerator as claimed in claim 1 or 2 is characterized in that, to the adjusting of refrigeration with the flow path resistance of cooler, carries out with the cold-producing medium control valve of double as flow channel switching valve.

4. refrigerator as claimed in claim 1 or 2 is characterized in that, refrigerating mode when running at the same time, freezing is rotating speed low when common with cooler and refrigeration with the rotating speed of the circulating cold air fan of cooler.

5. refrigerator as claimed in claim 1 or 2 is characterized in that, refrigerating mode when running at the same time, the rotating speed of compressor is a rotating speed high during than common cooling.

6. refrigerator as claimed in claim 1 or 2, it is characterized in that, carry out the refrigerant-recovery mode operation after the refrigerating mode running finishes at the same time, by flow channel switching valve stop cold-producing medium to freezing with cooler and refrigeration with the flowing of cooler, with the refrigerant-recovery in each cooler in compressor.