CN105806035A

CN105806035A - Super-cooling control method of refrigeration device

Info

Publication number: CN105806035A
Application number: CN201610033253.8A
Authority: CN
Inventors: 刘志海; 王哲; 梁静; 彭洪祥; 范志军; 陈宝贵
Original assignee: Qingdao Haier Special Refrigerator Co Ltd
Current assignee: Qingdao Haier Special Refrigerator Co Ltd
Priority date: 2015-01-20
Filing date: 2016-01-19
Publication date: 2016-07-27
Anticipated expiration: 2036-01-19
Also published as: CN105806035B; CN105806034B; CN105806034A; CN105806007B; CN105806007A; CN105806006B; CN205536772U; CN105806006A

Abstract

The invention provides a super-cooling control method of a refrigeration device. The refrigeration device comprises a freezing chamber used for containing frozen foods, a temperature detection mechanism used for detecting temperature of the frozen foods, an air feeder used for blowing freezing air down in the freezing chamber, and a freezing circulation loop, wherein the freezing circulation loop comprises a compressor, a radiator, an expansion valve and a cooler which are connected together. According to the refrigeration device, the foods in the freezing chamber can be efficiently frozen by super cooling; the cooling speed is kept constant as far as possible during super cooling; the temperature of the frozen foods can be measured every specified time; the operation parameters of the refrigeration device are adjusted on the basis of the measurement results; the control is updated for n1 times repeatedly under the condition that the frozen foods are thick foods; the control is updated for n2 times repeatedly under the frozen foods are thin foods; therefore, the super cooling caused by loss of thin blood can also be suppressed even if the frozen foods are thick foods.

Description

The supercooling control method of refrigeration plant

Technical field

The present invention relates to a kind of refrigeration plant of cooling preservation food etc. in storeroom, particularly relate to the supercooling control method of the refrigeration plant of the function of a kind of food etc. having in supercooling carrys out freezing refrigerating chamber.

Background technology

So far, make the freezing method of food product refrigeration be used when refrigerating chamber freezing through supercooling state, when this method is used, then little due to the crystallization of ice, the cell of survivable food, therefore can be reduced the effect that blood and slime runs off.

There is the refrigeration plant of above-mentioned supercooling function Figure 10 in the patent documentation of following Japanese Patent Laid-Open 2008-267646 and the record of its explanation.Specifically, when pressing supercooling button, proceed by the accumulative (step 1) of supercooling time.Here, time till room temperature arrives supercooling is set in advance in the scope of 5 minutes to 72 hours, preferably in the scope of 1 hour to 24 hour, (step 2) after this time, it is controlled making automatically to carry out variations in temperature (step 3) to low temperature side inside supercooling box.It addition, not shown critesistor detect refrigeration plant door trip etc. actually used in temperature rise time, the time below the most accumulative set point of temperature.The (step 4) when the cumulative time judging the step 2 shown in Fig. 9 and step 3 has reached the stipulated time, returns to common value (step 5) by the speed of the design temperature of critesistor, compressor 10 and fan 2.

By carrying out such cooling such that it is able to realize the supercooling of food with less energy, and improve freezing quality.

But, in the invention described in above-mentioned patent documentation, when the temperature that the temperature of the refrigerating chamber when supercooling sets is not enough low temperature (the most subzero about 15 degree), when carrying out supercooling at such a temperature, have the situation that blood and slime loss is multiple.

Summary of the invention

The present invention completes in view of the foregoing, its object is to provide the supercooling control method of a kind of refrigeration plant, and it can be through the food in supercooling efficiently freezing refrigerating chamber.

The supercooling control method of the refrigeration plant that the present invention provides, described refrigeration plant includes: for storage be frozen the refrigerating chamber of thing, for being frozen the temperature sensor of the temperature of thing described in detecting, for blowing downward pressure fan and the freeze cycle loop of cold air inside described refrigerating chamber, described freeze cycle loop includes compressor, radiator, expansion valve and the cooler linked together；Cooling control method includes:

After step 1, supercooling pattern start, set the operation initial value of refrigeration plant；

Step 2, use rate of cooling V being frozen thing described in described temperature sensor measurement；

Rate of cooling V measured in step 3, comparison step 2 and the size of the fixed number a of setting；

If step 4 V is less than a, then improve the operational factor of refrigeration plant；

If step 5 V is not less than a, then maintain the operational factor of refrigeration plant；

Step 6, use described temperature sensor again measure described in be frozen rate of cooling V of thing；

Rate of cooling V measured in step 7, comparison step 6 and the fixed number b of setting, fixed number c and the size of fixed number d；

If step 8 V is less than fixed number b, then improve the operational factor of refrigeration plant；

If step 9 V is more than b and less than c, then maintain the operational factor of refrigeration plant；

If step 10 V is more than c and less than d, then reduce the operational factor of refrigeration plant；

If step 11 V is more than d, then refrigeration plant runs to run initial value；

Step 12, repetitive operation step 7-step 11, if reach set point number n1；If it is step 13 is performed, if not then performing step 14；

Step 13, judge whether the operational factor of refrigeration plant reaches peak；If it is step 15 is performed, if not then performing step 14；

Step 14, repetitive operation step 7-step 11, if reach set point number n2；If it is step 16 is performed, if not then repetitive operation step 7-step 11 until reaching set point number n2；

Step 15, refrigeration plant run to run initial value；

If step 16 supercooling mode operation time reaches the setting time, then stop refrigeration plant and perform supercooling pattern；Wherein, a ＜ b ＜ c ＜ d, n1 ＜ n2.

According to the present invention, rate of cooling is kept constant when carrying out supercooling as far as possible, measure the temperature being frozen thing at intervals of set time, the operational factor of refrigeration plant is adjusted based on measurement result, it is frozen the situation that thing is thicker food control to be updated n1 time repeatedly, is frozen the situation that thing is relatively thin food and control is updated n2 time repeatedly, thus, even if being frozen thing is thick food, it is also possible to carry out the supercooling suppressing blood and slime loss to produce.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the front appearance figure of the refrigeration plant of the present invention.

Fig. 2 is the side sectional view of the general structure of the refrigeration plant representing the present invention.

Fig. 3 (A) is the side sectional view of the structure of the upper strata refrigerating chamber periphery of the refrigeration plant representing the present invention.

Fig. 3 (B) is the sectional view of part released and represent accommodating container.

Fig. 4 is the axonometric chart of the spacer member representing the refrigeration plant constituting the present invention.

Fig. 5 is the flow chart representing the cooling action when refrigeration plant of the present invention carries out supercooling pattern.

Fig. 6 is the flow chart of the action representing the wind path shutter when refrigeration plant of the present invention carries out supercooling pattern.

Description of reference numerals

1, refrigeration plant；

2, heat insulating box；

2a, outer container；

2b, interior case；

2c, heat-barrier material；

3, cold room；

4, ice-making compartment；

5, upper strata refrigerating chamber；

6, lower floor's refrigerating chamber；

7, vegetable compartment；

8, door；

9, door；

10, door；

11, door；

12, door；

13, cooling chamber；

13b, opening；

14, supply wind path；

15, supply wind path；

17, wind path is returned；

18, wind path shutter；

20, spacer member；

20a, inclined plane；

21, connected entrance；

22, peristome；

23, the 2nd pressure fan；

23a, fan；

23b, housing；

24, loading plate；

25, hole portion；

26, it is frozen thing；

28, blow-off outlet；

29, accommodating container；

29a, blow vent；

31, compressor；

32, the 1st pressure fan；

33, cooler；

34, temperature sensor；

36, heat insulation next door；

37, heat insulation next door；

38, spacer member；

39, spacer member；

40, wind path；

41, wind path；

42, wind path；

43, wind path

44, the 1st region；

45, the 2nd region；

46, wind path.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.

Below, based on accompanying drawing, the refrigeration plant involved by embodiments of the present invention is described in detail.

As it is shown in figure 1, refrigeration plant 1 possesses the heat insulating box 2 as main body, it is internally formed the storeroom of preserved food products etc. at heat insulating box 2.It is divided into multiple cool room according to storage temperature or purposes inside storeroom.The superiors are cold rooms 3, are ice-making compartment 4 on the left of its lower floor, and right side is upper strata refrigerating chamber 5, then its lower floor is lower floor's refrigerating chamber 6, and orlop is vegetable compartment 7.

The basic function of refrigeration plant 1 is the food etc. being accommodated in each storeroom to be stored thing be cooled to the temperature of regulation.As an example, the indoor temperature of cold room 3 is in the range of 3 DEG C to 6 DEG C, and the indoor temperature of freezer (lower floor's refrigerating chamber 6 etc.) is in the range of-16 DEG C to-22 DEG C, and the indoor temperature of vegetable compartment 7 is in the range of 3 DEG C to 8 DEG C.

Having opening before heat insulating box 2, on the peristome of corresponding described each cold room 3 grade, opening and closing is provided with each 8-12 freely.The top and the bottom, right side of door 8 are rotatably supported on heat insulating box 2.It is supported in freely on heat insulating box 2 additionally, door 9-12 extracts out before refrigeration plant 1.

As shown in Figure 2, the main body of refrigeration plant 1 i.e. divides heat insulating box 2 by outer container 2a, interior case 2b and heat-barrier material 2c is constituted, wherein, described outer container 2a is to make at the steel plate above with peristome, described interior case 2b has the inner side being arranged at outer container 2a with gap, is to make at the synthetic resin above with peristome, and described heat-barrier material 2c is that the foamed polyurethane being filled in the gap between outer container 2a and interior case 2b is made.It addition, each 8-12 can also use the thermal insulation construction identical with heat insulating box 2.

Cold room 3 and be insulated next door 36 between the ice-making compartment 4 and upper strata refrigerating chamber 5 of its lower floor and be spaced.Heat insulation next door 36 is the manufactured goods of synthetic resin, is filled with heat-barrier material inside it.

Additionally, be spaced by next door (not shown) between ice-making compartment 4 and upper strata refrigerating chamber 5.It addition, between ice-making compartment 4 and upper strata refrigerating chamber 5 and the lower floor's refrigerating chamber 6 being arranged at its lower floor, cold air circulation connects freely.Further, it is insulated next door 37 between lower floor's refrigerating chamber 6 and vegetable compartment 7 to divide.

Additionally, be formed with the wind path of the air flow cold room 3 by cooling on the inside and end face of the cold room 3 within interior case 2b.Equally, the inboard at ice-making compartment 4 and upper strata refrigerating chamber 5 is formed with the supply wind path 14 divided by spacer member 38.

Upper strata refrigerating chamber 5 be formed above be synthesized the spacer member 20 that resin makes and divide, and be communicated in the wind path of supply wind path 14.Further, the 2nd pressure fan 23 of cold air is sent when being configured with supercooling pattern on upper strata refrigerating chamber 5 to upper strata refrigerating chamber 5.

The more inboard of supply wind path 14 in the inside of interior case 2b is provided with the cooling chamber 13 being divided formation by spacer member 39.The spacer member 29 on cooling chamber 13 top is formed and connects cooling chamber 13 and the opening of supply wind path 14, its opening is equipped the 1st pressure fan 32 for being circulated air.On the other hand, at the opening 13b that the return cold air from storeroom is sucked to the inside of cooling chamber 13 formed below of cooling chamber 13.

Upper strata refrigerating chamber 5 is provided with the accommodating container 29 being frozen thing for receiving food etc..Accommodating container 29 is the container that the synthetic resin of the substantially box-shape of upper opening is made.Accommodating container 29 is assembled in the not shown framework being fixed on door 10, and forwards extracts out together with door 10 and constitute freely.

Furthermore, in the present embodiment, loading plate 24 is arranged in the inside of accommodating container 29.Thus, it is possible to guarantee the wind path of the lower section of loading plate 24, it is possible to more effectively food etc. is frozen thing and cools down through supercooling.Therefore, the ice crystal that food is i.e. frozen thing is little, the cell of survivable food, such that it is able to the generation that suppression blood and slime runs off.This item is described in detail with reference to Fig. 3 etc..

The cooler 33(vaporizer of the air being circulated for cooling it is configured with) inside cooling chamber 13.Cooler 33 is connected with compressor 31, radiator (not shown), expansion valve (capillary tube) (not shown) by refrigerant piping, constitutes the freeze cycle loop of steam compression type.It addition, in refrigeration plant 1 involved by present embodiment, iso-butane (R600a) is used as the cold-producing medium of described freeze cycle.

Below, the basic cooling action of the refrigeration plant 1 with above-mentioned composition is illustrated.

First, carry out the air in cooling chamber 13 by the cooler 33 in described steam compression type freeze cycle loop to cool down.The air of cooled device 33 cooling is discharged to supply wind path 14 from the opening of cooling chamber 13 by the 1st pressure fan 32.

Then, the part cooling air discharged passes through wind path shutter 18(such as to supply wind path 14, motor antivibrator) it is adjusted to suitable flow, flow to supply wind path 15, supply to cold room 3.Thus, it is stored in the food etc. within cold room 3 and can carry out cooling preservation at a suitable temperature.

It is supplied in the cold air within cold room 3, is supplied to vegetable compartment 7 by not shown connection wind path.Return to the inside of cooling chamber 3 through returning wind path 17, the opening 13b of cooling chamber 13 at the cold air of vegetable compartment 7 circulation.Therefore, then by cooler 33 cool down.

On the other hand, supply wind path 14 the part cooling air discharged supplies to ice-making compartment 4 and upper strata refrigerating chamber 5.Further, lower floor's refrigerating chamber 6 that ice-making compartment 4 connects with the air flow within upper strata refrigerating chamber 5, the air within lower floor's refrigerating chamber 6 flows through the bottom of lower floor's refrigerating chamber 6, is flowed to the inside of cooling chamber 13 by the opening 13b of cooling chamber 13.

As described above, the air of cooled device 33 cooling is circulated in storeroom, carries out freezing or the cooling preservation of food etc..In present embodiment, possessing the operation according to user and be frozen, by be accommodated in upper strata refrigerating chamber 5, the supercooling pattern that thing carries out cooling down, this function carries out described below with reference to Fig. 5 etc..

Below, with reference to Fig. 3 and Fig. 4, the composition near upper strata refrigerating chamber 5 is described in detail.

With reference to Fig. 3 (A), upper strata refrigerating chamber 5 is configured with the accommodating container 29 in substantially cell type shape, is configured with loading plate 24 in accommodating container 29.In square shape under loading plate 24 top view, the sidewall of its each side and accommodating container 29 near to or in contact with.Material employing as loading plate 24 has metal or the resin in multiple hole portion.Additionally, the position of the loading plate 24 in accommodating container 29 inside is fixed.This fixture construction can make the leg position highlighted downwards from loading plate 24 contact below accommodating container 29, by being arranged at the card locking mechanisms such as the hook of accommodating container 29, loading plate 24 can be hung from top, it is also possible to the periphery of loading plate 24 is positioned in the side walls collapse making accommodating container 29 position outside side.

By loading plate 24, accommodating container 29 is divided into two spaces.For specifically, the inner space of accommodating container 29 is divided into than loading plate 24 the 1st region 44 by the top with than loading plate 24 the 2nd region 45 on the lower.1st region 44 is the region being frozen thing 26 of the food etc. that storage should be freezing, is frozen thing 26 and is placed in above loading plate 24.2nd region 45 is the region of the narrow width than the 1st region 44 above-below direction, is the region for cold wind process under behaviour in service.Between the inside of accommodating container 29, the 1st region 44 and the 2nd region 45, the hole portion through being formed from loading plate 24 connects.

Spacer member 20 is the component being made up of the resin of tabular, is the component separating wind path in the upper end of upper strata refrigerating chamber 5.Connected entrance 21 is by the shape of regulation and configuration, and is formed multiple in spacer member 20, in order to the cold air of upper strata refrigerating chamber 5 uniformly across.Peristome 22 is formed at than connected entrance 21 more rearward, i.e. the inboard of upper strata refrigerating chamber 5, and peristome 22 is configured with the 2nd pressure fan 23.In other words, the 2nd pressure fan 23 is configured at than connected entrance 21 more rearward, is arranged at the vicinity of the cold wind inflow blowing mouth 28 automatically supplying wind path 14.

2nd pressure fan 23 is the axial flow fan that swinging fan is accommodated in housing.The housing of the 2nd pressure fan 23 is fixed on spacer member 20 upper face side.

It is configured with temperature sensor 34 on the top of upper strata refrigerating chamber 5.Temperature sensor 34 is such as infrared ray sensor, measures the surface temperature being frozen thing 26 being placed in loading plate 24 above.In the present embodiment, when carrying out supercooling pattern in the requirement according to user, measured the temperature being frozen thing 26 by temperature sensor 34 while, the freezing function of regulation upper strata refrigerating chamber 5.The detailed content of concerns once describes with reference to the flow chart etc. shown in Fig. 5.

With reference to Fig. 3 (B), when in order to carry out supercooling pattern startup 2 pressure fan 23, cooler 33 cold air cooled down is formed by the air-supply effect of the 2nd pressure fan 23 and forms wind path 40 to the 1st region air-supply of upper strata refrigerating chamber 5.Here, the direction of wind path 40 is lower diagonally forward.

Therefore, a part of cold air of formation wind path 40, through the hole portion 25 of loading plate 24, enters the 2nd region 45 from the 2nd pressure fan 23.Thereafter, described cold air moves towards front in the 2nd region 45 and forms wind path 41.Additionally, a part of cold air forming wind path 40 can blow to be frozen thing 26.

Inside the 2nd region 45, it flow to the cold air near the front end of upper strata refrigerating chamber 5, through the hole portion 25 of loading plate 24, and moved towards the 1st region 44 from the 2nd region 45.Thus, in the inside in the 1st region 44, form the wind path 42 flowed upward.

Thereafter, the cold air of composition wind path 42 is via the connected entrance 21 being arranged in spacer member 20, and enters between spacer member 20 and insulated room next door 36.Further, formation is flowed into the wind path 43 that the cold air in this region flows towards rear.Wind path 43 arrives the 2nd pressure fan 23.

During from the foregoing, make the 2nd pressure fan 23 operate under in behaviour in service, according to the path sequentially forming circulating cold air of wind path 40,41,42,43.Thus, the temperature difference in the inside of upper strata refrigerating chamber 5 diminishes, it is possible to proceeded through overcooled freezing.

Additionally, in the present embodiment, be not only when supercooling pattern be frozen thing 26 side and above, and the most also form wind path and make cold air circulate.Consequently, because be frozen thing 26 to carry out freezing in a low temperature of such as less than-20 DEG C equably from periphery, so its internal temperature difference diminishes, the incidental situation of supercooling can be realized.

Additionally, in the present embodiment, on the loading plate 24 being formed with multiple hole portion 25, mounting is frozen thing 26.Consequently, because the cold air contact flowed into from below via this hole portion 25 is frozen thing 26, being integrally cooled so being frozen thing 26, the incidental situation of supercooling can be realized.

Furthermore, in the present embodiment, it is being frozen configuration temperature sensor 34 above thing 26, while measuring the upper surface temperature being frozen thing 26, the refrigerating function of regulation cooling upper strata refrigerating chamber 5.Consequently, because while being able to confirm that the situation being frozen thing 26, carry out supercooling, run off it is possible to reduce blood and slime.

With reference to Fig. 4 in detail, the structure of spacer member 20 is described in detail.Connected entrance 21 by regulation shape and configuration formed multiple, in order to upper strata refrigerating chamber 5 inner homogeneous cool down.Here, elongated connected entrance is formed in the direction of the width.

2nd pressure fan 23 is to possess swinging fan 23a(such as, propeller type fan), housing 23b and the axial flow fan of not shown fan motor.In 2nd pressure fan 23, housing 23b is fixed in the upper face side of spacer member 20.Here, the cold air being made up of the wind path 46 from cooler and the wind path 43 from upper strata refrigerating chamber enters fan 23a.

The rear portion of spacer member 20, i.e. inboard are formed with inclined plane 20a the most just tilted towards rear.Further, inclined plane 20a is formed with peristome 22, peristome 22 is equipped the 2nd pressure fan 23.

Additionally, due to the 2nd pressure fan 23 is disposed in inclined plane 20a, therefore the gyroaxis of fan 23a is not vertical, but direction tilts before and after refrigeration plant 1.For specifically, the 2nd its blow-off direction of pressure fan 23 (the rotary shaft direction of the blowout side of fan 23a) downward, and configures the most obliquely.

Below, according to the flow chart shown in Fig. 5 and Fig. 6, while above-mentioned each figure, centered by supercooling pattern, the action to the refrigeration plant of present embodiment illustrates.Here, following action is to be controlled by the controlling organization such as CPU or remote control.

First, the flowing to the cold air in common cooling operating illustrates (step S11).With reference to Fig. 3 (A), in common cooling operating, it is sent to supply a part of cold air of wind path 14 by the 1st pressure fan 32 from cooling chamber 13, through blowing mouth 28, and flows into upper strata refrigerating chamber 5.It addition, as described, in common cooling operating, a part of cool-air feed in supply wind path 14 to ice-making compartment 4(reference Fig. 2) or lower floor's refrigerating chamber 6, and it is supplied to cold room 3 by supply wind path 15.

From the cold air of supply wind path 14 inflow through being formed at connected entrance 21 and the peristome 22 of spacer member 20, and flow into upper strata refrigerating chamber 5.Here, when common cooling operating, the 2nd pressure fan 23 being configured at peristome 22 is inoperative, and cold air is through being in the fan circumference of halted state.The cold air being supplied to upper strata refrigerating chamber 5 flows into the lower floor's refrigerating chamber 6 being disposed below.

Common cooling operating is until supercooling pattern starts to be carried out continuously (NO of step S12).

Below, user pressing operation button etc., start supercooling pattern (YES of step S12).After supercooling pattern starts, initial value is set to regulation A(step S13).Here, it is stipulated that A is with reference to Fig. 2 to compressor 31(), the 1st pressure fan 32(is with reference to Fig. 3 (A)), the 2nd pressure fan 23(is with reference to Fig. 3 (A)), wind path shutter 18(is with reference to Fig. 3 (A)) etc. the combination of setting at each position.Here, as it has been described above, the 1st pressure fan 32 sends into cold air to each storeroom of cold room 3 grade, the 2nd pressure fan 23 carries out cold air air-supply in the inside of upper strata refrigerating chamber 5.

Below, use temperature sensor 34(with reference to Fig. 3 (B)), measure rate of cooling.For specifically, first, temperature sensor 34 is used to start to be frozen the measurement (step S14) of the surface temperature of thing 26.Particular up to carrying out this temperature survey (NO of step S15) till certain time.After reaching the stipulated time (YES of step S15), obtain rate of cooling (step S16).For specifically, obtain rate of cooling with following formula.Here, certain time is such as 150 seconds.

V=(T1-T2)/T

Here, T1 is to measure the temperature being frozen thing 26 when starting, and T2 is the temperature being frozen thing 26 after certain period, and T is above-mentioned certain period.

Below, rate of cooling V obtained by step S16 and fixed number a(step S17 are compared).For specifically, in above-mentioned steps S13, set A and be set to that rate of cooling is as minimum.Therefore, if rate of cooling V is less than the YES of fixed number a(step S17), then in order to improve rate of cooling change setting A.Such as, carry out following control: improve the rotating speed of each fan, improve the operating frequency of compressor 31, improve the rotating speed of the fan (not shown) of radiator (not shown), expand the aperture etc. of expansion valve (not shown).On the other hand, if rate of cooling V is higher than fixed number a, then setting A(step S18 that (NO of step S17) is present is maintained).

In the refrigeration plant of present embodiment, rate of cooling is kept constant when carrying out supercooling as far as possible.To this end, measure the temperature being frozen thing 26 at intervals of set time, adjust based on measurement result and set A.

Below, said temperature sensor 34 is used again to measure the temperature (step S20) being frozen thing 26.Further, till the stipulated time, carry out this measurement (NO of step S21) always, after the stipulated time (YES of step S21), measure rate of cooling and compare (from step S22 to step S25) with fixed number set in advance.

Here, using fixed number b, c, d from step S22 to step S25, the magnitude relationship of these fixed numbers is b ＜ c ＜ d.

If the rate of cooling calculated by step S21 is less than the YES of fixed number b(step S22), then inadequate due to its speed, therefore to improve rate of cooling change setting A(step S26).The concrete grammar improving rate of cooling is described above.

If rate of cooling is more than b and the YES less than c(step S23), then, owing to rate of cooling is in suitable scope, therefore maintain and set A(step S27).

If rate of cooling is more than c and the YES less than d(step S24), then too fast due to rate of cooling, therefore reduce rate of cooling change setting A(step S28).Such as, reduce the winding number of each fan, reduce the operating cycle of compressor 31, reduce the winding number of the fan (not shown) of radiator (not shown), for reducing the control of the aperture etc. of expansion valve (not shown).

If rate of cooling is more than the YES of d(step S25), the most in this case, also due to rate of cooling is too fast, therefore setting A is set as initial value (minimum).

In the present embodiment, the measurement from step S21 to step S25 will be utilized and judge the most such as 4 times (NO of step S30).Further, if such measurement and judgement carry out 4 times (YES of step S30), then judge whether setting A now reaches maximum cooling (step S31).If setting A to reach maximum one (YES of step S31), then setting A is returned to initial value (step S32).That is, setting A is reduced to floor level.Reason for this is that because setting A as maximum case in step S31 is to represent that being frozen thing 26 is thicker food, the generation that so thick food runs off to suppress blood and slime, need to reduce rate of cooling.

On the other hand, if setting A in step S31 is not maximum (NO of step S31), then in order to will be from above-mentioned steps S20 to step S31 the most such as 10 times, these steps carry out 6 times (NO of step S33) again.This is because being frozen thing 26 is relatively thin food, it is possible to improve rate of cooling further.

In other words above-mentioned control, in the present embodiment, be frozen the situation that thing 26 is thicker food and control updated 4 times repeatedly, be frozen the situation that thing 26 is relatively thin food and control is updated 10 times repeatedly.Thus, even if being frozen thing 26 is thick food, it is also possible to carry out the supercooling suppressing blood and slime loss to produce.Additionally, in the present embodiment, the process after step S33, set A and do not change.

If above-mentioned mensuration reaches 10 times (YES of step S33), then until till the stipulated time, continuing supercooling pattern (NO of step S34, step S35) with the setting of present situation.Further, if through certain time (YES of step S34), then terminating supercooling pattern, return to generally cool down.

Here, the stipulated time of step S34 is such as about 75 minutes.In this flow chart, preset the period carrying out supercooling pattern, cool down but it is also possible to be set to the output according to temperature sensor to return to generally.

With reference to the flow chart of Fig. 6, below, to wind path shutter 18(when carrying out supercooling pattern with reference to Fig. 2) action illustrate.

According to the operation of user, when moving to supercooling pattern from generally cooling (step S51, the NO of step S52) (YES of step S52), it is judged that whether the indoor temperature of cold room 3 is more than 8 DEG C (step S53).Further, if the temperature of cold room 3 is more than 8 DEG C (YES of step S53), then confirm that wind path shutter 18(is with reference to Fig. 2) whether open (step S58), if wind path shutter 18 opens (YES of step S58), then maintain the state of its original.On the other hand, if wind path shutter 18 cuts out (NO of step S58), then open wind path shutter 18 and cold air is imported cold room 3 cool down.Thereby, it is possible to the temperature of cold room 3 is maintained suitable low temperature state.

On the other hand, if the temperature of cold room 3 is less than 8 DEG C (NO of step S53), and wind path shutter 18 cuts out (NO of step S54), then the state maintaining wind path shutter 18 to close is constant.

If wind path shutter 18 is opened (YES of step S54), then use the upper surface temperature being frozen thing 26 measured by temperature sensor 34 higher than 2 DEG C (YES of step S55), then close wind path shutter 18(step S60).Thereby, it is possible to the air quantity improving upper strata refrigerating chamber 5 accelerates rate of cooling, it is achieved supercooling.

On the other hand, if food temperature is less than 0 DEG C (YES of step S56) less than 2 DEG C (NO of step S55), the temperature of cold room, then close wind path shutter 18(step S61), reduce the ability (step S62) of the 2nd pressure fan 23.Thus, even if increasing the cold air from blow-off outlet 28 supply by closing wind path shutter 18, it is also possible to by reducing the ability of the 2nd pressure fan 23, and rate of cooling is kept constant.Said process carries out (NO of step S57) till the stipulated time (such as 75 minutes) always.Thereafter, if having passed through the stipulated time (YES of step S57), then perform to generally operate.Here, it is also possible to be set to the output according to temperature sensor to return to generally and operate.

It is above the explanation of refrigeration plant 1 involved in the present invention.

The present invention can change as follows.

Such as, in the above description, with reference to Fig. 3 (B), it is illustrated being frozen the situation of thing 26 with supercooling pattern freezing in upper strata refrigerating chamber 5, uses the upper strata refrigerating chamber 5 of present embodiment can also carry out common freezing action or quick-freezing.

Claims

1. the supercooling control method of a refrigeration plant, it is characterized in that, described refrigeration plant includes: for storage be frozen the refrigerating chamber of thing, for being frozen the temperature sensor of the temperature of thing described in detecting, for blowing downward pressure fan and the freeze cycle loop of cold air inside described refrigerating chamber, described freeze cycle loop includes compressor, radiator, expansion valve and the cooler linked together；Cooling control method includes:

Step 15, refrigeration plant run to run initial value；

The supercooling control method of refrigeration plant the most according to claim 1, it is characterised in that: described step 16 includes:

If step 161 supercooling mode operation time not up to sets the time, but is frozen thing described in described temperature sensor measurement and is less than set temperature value, then stop refrigeration plant and perform supercooling pattern；

If step 162 supercooling mode operation time reaches the setting time, then stop refrigeration plant and perform supercooling pattern.

The supercooling control method of refrigeration plant the most according to claim 1 and 2, it is characterized in that: described step 2 and step 6 use rate of cooling V being frozen thing described in temperature sensor measurement, particularly as follows: use surface temperature T1 being frozen thing described in described temperature sensor measurement, after setting time T, re-use surface temperature T2 being frozen thing described in described temperature sensor measurement, according to formula V=(T1-T2)/T, obtains rate of cooling V.

The supercooling control method of refrigeration plant the most according to claim 1 and 2, it is characterized in that: the operational factor of described raising refrigeration plant, particularly as follows: improve the operating frequency of compressor, and/or improve the rotating speed of the fan of radiator, and/or expand the aperture of expansion valve.

The supercooling control method of refrigeration plant the most according to claim 1 and 2, it is characterized in that: the operational factor of described reduction refrigeration plant, particularly as follows: reduce the operating frequency of compressor, and/or reduce the rotating speed of the fan of radiator, and/or reduce the aperture of expansion valve.