WO2017075931A1

WO2017075931A1 - Refrigeration device and method for control super-cooling

Info

Publication number: WO2017075931A1
Application number: PCT/CN2016/076558
Authority: WO
Inventors: 田岛博志; 小野田岳史; 金野麻里菜
Original assignee: 青岛海尔特种电冰柜有限公司; 亚科雅株式会社
Priority date: 2015-11-06
Filing date: 2016-03-17
Publication date: 2017-05-11
Also published as: JP2017089947A

Abstract

A refrigeration device (1), comprising: an upper freezer (5) for accommodating objects to be frozen (26); a compressor (31), constituting a freezing circulation system which cools the air provided to the upper freezer (5); a second blower (23) for blowing cold air to the objects to be frozen (26). In addition, a temperature sensor (34) for detecting the temperature of the objects to be frozen (26) is disposed at an upper part of the upper freezer (5). During a super-cooling operation of the refrigeration device (1), when the temperature of the objects to be frozen (26) detected by the temperature sensor (34) is lower than a first temperature, a control mechanism enables the compressor (31) to operate continuously. Moreover, when the temperature of the objects to be frozen (26) is lower than a second temperature which is lower than the first temperature, the control mechanism enables the compressor (31) to operate continuously, while enabling the second blower (23) to operate so as to blow cold air to the objects to be frozen (26).

Description

Refrigeration device and supercooling control method thereof

Technical field

[0001] The present invention relates to an apparatus for cooling a food or the like in a storage compartment, and more particularly to a refrigeration apparatus having a function of freezing a food or the like in a freezing compartment and freezing it, and a supercooling control method therefor. Background technique

[0002] Currently, a freezing method in which a frozen food in a freezer compartment is subjected to a supercooled state to freeze a food is employed. When this method is employed, since the ice crystals are small and it is difficult to destroy the cells of the food, the effect of reducing blood loss after thawing can be obtained.

A refrigeration apparatus having the above-described supercooling function is described in the patent document of Japanese Patent Publication No. 2008-267646. Specifically, referring to the flowchart of Fig. 8, when the user presses the supercooling button 吋, the control mechanism accumulates the supercooling time in step S101 after accumulating the time of the phase 1 in step S100. Here, the time from the normal temperature to the overcooling temperature is set in advance until the time passes, that is, in the case of N 0 in step S101, it stands by. Then, when the predetermined time has elapsed, that is, YES in step S101, the process proceeds to step S102. In step S102, it is controlled to automatically change the temperature inside the supercooling cartridge to the low temperature side. The control unit performs the processing of step S102 until the predetermined time period, that is, the step S103 is NO. When it is determined that the accumulated time between the phase 2 and the phase 3 reaches the predetermined time, that is, if the step S103 is YES, in step S104, the control mechanism returns the set temperature of the thermistor, the speed of the compressor and the fan. To the usual value. By performing such a cooling operation, it is possible to achieve supercooling of the food with less energy and to improve the quality of the freezing.

[0004] In the patent document of Japanese Patent Publication No. 2011-7487, a refrigeration device 100 that controls supercooling while performing a supercooling operation while detecting the indoor temperature of the freezer is described. Specifically, referring to Fig. 9, the refrigerating apparatus 100 that controls supercooling is provided with a freezing compartment 101, and the front opening is closed by the doors 105, 106. Further, a cooler 102 and a fan 107 that blows cold air cooled by the cooler to the freezer compartment 101 side are disposed inside the freezing compartment 101. Further, a compressor 104 that compresses the refrigerant is disposed below the inside of the freezing compartment 101. After the cooling operation is performed, the control mechanism adjusts the rotation speed of the fan 107 in accordance with the temperature condition of the freezing compartment 101, thereby achieving supercooling. technical problem

[0005] However, in the invention described in Patent Document 1, since the fan and the compressor are intermittently operated even at any stage, there is a case where the cooling ability for generating the supercooling enthalpy is not sufficiently large, and the defrosting is performed. The problem of blood loss cannot be reduced. Further, in Patent Document 2, the rotation speed of the fan 107 is adjusted according to the temperature condition of the freezing compartment 101, but, for example, when a food such as meat having a weight of several kilograms is to be frozen in a supercooled state, it is difficult to occur. cool down. Further, even if it is near the surface of the food, supercooling cannot occur. In this case, there is a problem that blood loss of the thawed sputum is more likely to occur as described above.

Problem solution

Technical solution

The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigeration apparatus capable of effectively freezing a frozen object by supercooling even if a frozen object stored in a freezer compartment is a relatively large object. Its supercooling control method.

The present invention provides a refrigeration apparatus including:

[0008] a freezer compartment for accommodating the frozen object;

[0009] a refrigeration cycle system in which a compressor, a condenser, a throttle device, and an evaporator are connected in order, and the cold air supplied to the freezer compartment is cooled by the evaporator;

[0010] a first blower, configured to send the cold air to the freezing chamber;

[0011] a second air blower, configured to blow the cold air blown by the first blower to the object to be frozen; [0012] a temperature detecting mechanism, configured to detect a temperature of the object to be frozen;

[0013] The control mechanism controls the operation of the refrigeration cycle system and the second blower based on an output of the temperature detecting mechanism.

Advantageous effects of the invention

Beneficial effect

[0014] The refrigeration apparatus and the supercooling control method thereof according to the present invention are configured such that the compressor of the refrigeration cycle system is continuously operated according to the temperature of the object to be frozen detected by the temperature detecting means, and the blower is The cold air is blown by the frozen product, so that even when a large-sized food is used as the frozen product, supercooling can be caused in the food, and the amount of blood loss of the defrosted mites can be reduced. Brief description of the drawing

DRAWINGS

1 is a front external view of a refrigeration apparatus according to an embodiment of the present invention.

2 is a side cross-sectional view showing a refrigeration apparatus according to an embodiment of the present invention.

3 is a block diagram showing an electrical structure of a refrigeration apparatus according to an embodiment of the present invention.

4 is a side cross-sectional view taken along line A-A of FIG. 1.

[ Fig. 5A] Fig. 5A is a side cross-sectional view showing a structure around a superstructure freezer compartment of the refrigeration apparatus according to the embodiment of the present invention.

[ Fig. 5B] Fig. 5B is a perspective view showing a spacer member of the refrigeration apparatus according to the embodiment of the present invention.

[0021] FIG. 6 is a flowchart showing a cooling operation for performing a supercooling operation in the refrigeration apparatus according to the embodiment of the present invention.

[0022] FIG. 7 is a sequence diagram showing a cooling operation for performing a supercooling operation in the refrigeration apparatus according to the embodiment of the present invention.

8 is a flow chart showing a supercooling operation in a refrigeration apparatus according to the background art.

9 is a side cross-sectional view showing a structure of a freezing compartment of a refrigeration apparatus according to the background art.

[0025] Description of the reference numerals:

[0026] 1, refrigeration equipment; 2, insulation box; 2a, outer box; 2b, inner box; 2c, insulation material; 3, cold storage room; 4A, freezer; 4, ice-making room 5, upper freezer; 6, the lower freezer; 7, vegetable room; 8, Π; 9, door; 10, door; 11, door; 12, door; 13, cooling room; 13b, cornice; 14, supply airway; 15, supply Wind road; 17, return to wind road; 18, wind circuit breaker; 19, defrosting heater; 20, spacer member; 20a, inclined surface; 21, communication port; 22, mouth; 23, blower; , fan; 23b, outer casing; 24, mounting plate; 25, hole; 26, cold animal; 27, operation panel; 28, air outlet; 29, storage container; 30, CPU; 31, compressor; 33, cooler 34, temperature sensor; 35, control button; 36, adiabatic spacer; 37, adiabatic spacer; 38, spacer; 39, spacer member; 40, wind road; 41, wind road; Wind path; 43, wind road; 44, first area 45, second area; 4 6. Wind path; 47, control substrate; 100, refrigeration equipment for controlling supercooling; 101, freezing chamber; 102, cooler; 104, compressor; 105, door; 106, door; 107, fan.

BEST MODE FOR CARRYING OUT THE INVENTION BEST MODE FOR CARRYING OUT THE INVENTION

[0027] Hereinafter, a refrigeration apparatus according to an embodiment of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, the refrigeration apparatus 1 is provided with a heat insulating box as a main body. 2. The inside of the heat insulating box 2 forms a storage chamber for storing food or the like. As the storage compartment, the uppermost layer is the refrigerating compartment 3, and the lower side of the lower layer is the ice making compartment 4, and the right side is the upper freezing compartment 5, and the lower layer is the lower freezing compartment 6, and the lowermost layer is the vegetable compartment 7. Here, since the ice making compartment 4, the upper freezing compartment 5, and the lower freezing compartment 6 are storage compartments in the freezing temperature zone, these may be collectively referred to simply as the freezing compartment 4A. Further, in the present embodiment, the upper freezing compartment 5 has a function of freezing the stored frozen object in a supercooled state. This function is described below.

[0029] Here, in the present embodiment, the refrigeration apparatus 1 is exemplified as a refrigeration apparatus including a plurality of storage compartments. However, as the refrigeration equipment 1, a refrigeration apparatus having only one freezer compartment may be employed, and the freezer compartment may have passed through. Cooling freezes the function of the frozen material.

[0030] The basic function of the refrigerating compartment 1 is to cool the stored objects such as foods stored in the respective storage compartments to a predetermined temperature. That is, the indoor temperature of the freezing compartment 3 is the refrigerating temperature zone, the indoor temperature of the freezing compartment 4A is the freezing temperature zone, and the indoor temperature of the vegetable compartment 7 is the refrigerating temperature zone.

[0031] The front surface of the heat insulating box 2 is formed with a cornice, and the doors 8 to 12 are closably provided in the mouth portions corresponding to the respective refrigerator compartments 3 and the like. The right upper and lower portions of the door 8 are rotatably supported by the heat insulating box 2. In addition, the door 9

〜12 is supported by the heat insulating box 2 in front of the refrigeration unit 1.

[0032] Here, the front surface of the door 8 is provided with an operation panel 27, and the user operates the operation panel 27 to realize various functions of the refrigeration apparatus 1. For example, the operator presses the operation button of the operation panel 27 to realize the supercooling operation for supercooling the frozen object 26 in the upper freezing compartment 5. This matter will be explained below.

[0033] As shown in FIG. 2, the heat insulating box 2 which is the main body of the refrigeration apparatus 1 is provided with an outer casing 2a made of a steel plate having the above-mentioned mouth portion, and having a gap inside the outer casing 2a. The inner box 2b made of synthetic resin having a mouth portion on the front side. Further, a gap between the outer casing 2a and the inner casing 2b is filled and foamed with a heat insulating material 2c made of foamed polyurethane. Further, each of the doors 8 to 12 also has the same heat insulating structure as that of the heat insulating box 2.

[0034] The refrigerating compartment 3 is partitioned by the adiabatic partition wall 36 between the ice making compartment 4 and the upper freezing compartment 5 located in the lower layer thereof. The heat insulating partition wall 36 is a molded product of a synthetic resin, and the inside thereof is filled with a heat insulating material. Further, the lower freezing compartment 6 and the vegetable compartment 7 are separated by an insulating partition wall 37. [0035] The ice making compartment 4 and the upper freezing compartment 5 are partitioned by a partition wall (not shown). Further, the ice making compartment 4 and the upper freezing compartment 5 communicate with each other and the lower freezing compartment 6 provided in the lower layer.

[0036] The inside and the top surface of the refrigerating compartment 3 inside the inner casing 2b are formed with a supply air passage 15 for allowing the cooled air to flow to the refrigerating compartment 3. Similarly, a supply air path 14 partitioned by a partition wall 38 made of synthetic resin is formed inside the ice making compartment 4 and the upper freezing compartment 5.

An air passage that is separated from the supply air passage 14 and partitioned by a spacer member 20 made of synthetic resin is formed above the upper freezing compartment 5. Further, on the upper surface of the upper freezing compartment 5, a blower 23 that sends cold air to the upper freezing compartment 5 in the supercooling operation is disposed. The blower 23 is a second blower for blowing cold air to the object to be frozen.

A further cooling chamber 13 partitioned and formed by the partition member 39 is provided on the further inner side of the supply air passage 14 inside the inner casing 2b. A port connecting the cooling chamber 13 and the supply air path 14 is formed in the partition member 39 at the upper portion of the cooling chamber 13, and a blower 32 for circulating air is disposed in the port. The blower 32 is a first blower for supplying cold air to each storage compartment. On the other hand, below the cooling chamber 13, a port 13b for sucking the returning cold air from the storage chamber into the inside of the cooling chamber 13 is formed.

The upper freezing compartment 5 is provided with a storage container 29 for storing a frozen object such as a food. The storage container 29 is a substantially box-shaped synthetic resin container having an upper mouth. The storage container 29 is assembled to a casing (not shown) fixed to the door 10, and is configured to be drawn forward in the same manner as the door 10.

Further, in the present embodiment, the placing plate 24 is disposed inside the storage container 29. Thereby, the air passage below the placing plate 24 is secured, and the frozen object 26 such as food can be more effectively cooled and frozen. Therefore, it is possible to reduce the ice crystals of the frozen product as food, and it is difficult to destroy the cells of the food, thereby suppressing the occurrence of blood loss. This matter will be described in detail with reference to Fig. 3 .

[0041] Here, the frozen object can be efficiently cooled by using the placing plate 24. However, it is also possible to have no mounting plate 24. In this case, the frozen object 26 is placed on the bottom surface portion of the storage container 29.

[0042] The inside of the cooling chamber 13 is provided with a cooler 33 as an evaporator that cools the circulating air. The cooler 33 is connected to a compressor 31, a condenser (not shown), and a throttle device (not shown) through a refrigerant pipe to constitute an evaporative compression refrigeration cycle. Further, a defrosting heater 19 for periodically dissolving frost applied to the surface of the cooler 33 is disposed below the cooler 33.

Further, the refrigeration apparatus 1 includes a control unit including a CPU (not shown), and the indoor temperature in each storage chamber is detected by a thermometer (not shown), and an electric signal indicating the indoor temperature is input to the control unit. This Further, the control unit controls the compressor 31, the blower 32, the blower 23, the defrosting heater 19, the air passage shutter 18, and the like based on an electric signal input from a thermometer or the like.

[0044] Next, a basic cooling operation of the refrigeration apparatus 1 having the above configuration will be described.

First, the compressor 31 constituting the vapor compression refrigeration cycle is operated by the control mechanism, whereby the air in the cooling chamber 13 is cooled by the cooler 33. The blower 32, which is cooled by the cooler 33 and operated by the control means, is discharged from the port of the cooling chamber 13 to the supply duct 14.

Further, a part of the cooling air discharged to the supply air passage 14 is adjusted to an appropriate flow rate by the air passage shutter 18 composed of the motor damper, and flows to the supply air passage 15 to be supplied to the refrigerating chamber 3. Thereby, it is possible to cool and store the food or the like stored in the inside of the refrigerator compartment 3 at a suitable temperature.

The cold air supplied to the inside of the refrigerating compartment 3 is supplied to the vegetable compartment 7 through a connecting air passage (not shown). And, vegetable room

The cold air circulating in 7 is returned to the inside of the cooling chamber 13 via the return branch 17 and the vent 13b of the cooling chamber 13. Therefore, it is cooled by the cooler 33.

On the other hand, a part of the cooling air discharged to the supply air path 14 is supplied to the ice making chamber 4 and the upper freezing chamber 5. Further, the air inside the ice making compartment 4 and the upper freezing compartment 5 flows into the communicating lower freezing compartment 6, and the air inside the lower freezing compartment 6 flows into the lower portion of the lower freezing compartment 6, and flows to the cooling compartment 13 through the opening 13b of the cooling chamber 13. internal.

As described above, the cooling air cooled by the cooler 33 is circulated in the storage chamber to perform freezing and cooling storage of the food or the like. In the present embodiment, the supercooling function of freezing the frozen object 26 accommodated in the upper freezing compartment 5 in accordance with the operation of the user is provided. This function will be described below.

[0050] Next, an electrical configuration of the above-described refrigeration apparatus 1 will be described with reference to Fig. 3 . As shown in Fig. 3, a CPU 30 as a control mechanism for controlling the operation of each part of the refrigeration apparatus 1 is attached to the control board 47 housed in the refrigeration apparatus 1. Further, the upper freezing compartment 5 is provided with a blower 23 that blows cold air to the frozen object 26 during the supercooling operation, and the motor housed in the blower 23 is connected to the output side terminal of the CPU 30. Further, in the upper freezing compartment 5, as described above, a temperature sensor 34 as a far-infrared thermometer for detecting the surface temperature of the frozen object 26 is disposed, and the temperature sensor 34 is connected to the input side terminal of the CPU 30.

Further, a control button 35 provided on the operation panel 27 is connected to the input side terminal of the CPU 30. Further, the compressor 31 and the defrosting heater 19 are connected to the output side terminals of the CPU 30, respectively.

[0052] Next, the structure in the vicinity of the upper freezing compartment 5 will be described in detail with reference to FIGS. 4, 5A and 5B. As shown in FIG. 4, a storage box 29 having a substantially box shape is disposed in the upper freezing compartment 5, and a placing plate 24 is disposed in the storage container 29. The mounting plate 24 has a quadrangular shape in plan view. As the material of the placing plate 24, a metal plate having a plurality of holes or a resin plate or a metal mesh or the like is used.

[0054] The storage container 29 is partitioned into two spaces by the placing plate 24. Specifically, the internal space of the storage container 29 is divided into a first region 44 above the mounting plate 24 and a second region 45 below the mounting plate. The first area 44 is an area in which the frozen object 26 such as a food to be frozen is stored, and the frozen object 26 is placed on the upper surface of the placing board 24. The second area 45 is an area for passing cold air under use conditions. Inside the storage container 29, the first region 44 and the second region 45 communicate via a hole formed in the mounting plate 24.

The spacer member 20 is a member made of a plate-like resin and is a member for partitioning the air passage at the upper end of the upper freezing compartment 5. The communication hole 21 has a predetermined shape and arrangement formed by uniformly passing cold air of the layer freezer compartment 5, and is formed in the spacer member 20. The mouth portion 22 is formed at the rear of the communication hole 21, that is, inside the upper freezing chamber 5, and the blower portion 23 is disposed on the mouth portion 22.

[0056] The blower 23 is an axial flow fan in which a rotary fan is housed in a casing. The outer casing of the blower 23 is fixed to the upper side of the spacer member 20.

A temperature sensor 34 is disposed at an upper portion of the upper freezing compartment 5. The temperature sensor 34 is a radiation thermometer such as a far-infrared sensor, and detects the surface temperature of the object 26 to be placed placed on the placing board 24. In the present embodiment, after the supercooling operation is performed in accordance with the user's instruction, the temperature sensor 34 detects the temperature of the frozen product 26, and the cooling capacity is adjusted. The matter is explained below.

Referring to FIG. 5A, when the blower 23 is operated for the supercooling operation, the cold air cooled by the cooler 33 shown in FIG. 2 is sent to the first region 44 of the upper freezing compartment 5 by the air blowing effect of the blower 23. A wind path 40 is formed. Specifically, the cold air constituting the air path 40 which is inclined downward toward the front is blown toward the surface of the object 26 to be frozen.

Further, a part of the cold air forming the air passage 40 passes through the hole portion 25 of the placing plate 24, and enters the second region 45 from the blower 23. Thereafter, the cold air moves forward in the second region 45 to form the air passage 41.

The cold air that has advanced to the vicinity of the front end of the upper freezing compartment 5 inside the second region 45 is moved from the second region 45 to the first region 44 through the hole portion 25 of the placing plate 24. Thereby, the air passage 42 that advances upward in the interior of the first region 44 is formed.

[0061] Thereafter, the cold air constituting the air passage 42 enters the partition member via the communication hole 21 provided in the partition member 20. 20 is between the insulating partition wall 36. Further, an air passage 43 that advances cold air entering the region to the rear is formed. The air passage 43 reaches the blower 23.

As described above, when the blower 23 is operated in the use state, a cold air circulation path in the order of the air passages 40, 41, 42, 43 is formed. Thereby, the temperature difference inside the upper freezing compartment 5 becomes small, and freezing by supercooling is promoted.

Further, in the present embodiment, in the supercooling operation, not only the side and the upper side of the object 26 but also the air path is formed below the object 26 to allow the cold air to flow. Therefore, since the frozen object 26 is from the periphery, for example, -20 °. Since the lower and lower temperatures are uniformly cooled as follows, the temperature difference inside is reduced, and a situation in which supercooling is likely to occur can be achieved.

Further, in the present embodiment, the temperature sensor 34 is disposed above the object 26 to be frozen, and the temperature of the upper surface of the object 26 to be frozen is detected, and the cooling capacity of the upper layer freezer compartment 5 is adjusted. Therefore, it can reduce the freezing of blood loss. The matter is explained below.

[0065] Referring to FIG. 5B, the structure of the spacer member 20 will be described in detail. Connecting hole 21 in order to uniformly cool the upper freezing compartment

The interior of 5 is formed in a plurality of shapes and configurations. Here, a continuous hole extending in the width direction is formed

twenty one.

The blower 23 is an axial flow fan including a rotary fan 23a such as a propeller fan, a casing 23b, and a fan motor (not shown). In the blower 23, the outer casing 23b is fixed to the upper surface of the spacer member 20. Here, the cold air constituting the air passage 46 from the cooler and the air passage 43 from the upper refrigeration unit enters the fan 23a.

[0067] An inclined surface 20a which is gradually inclined downward toward the rear is formed in the rear portion of the spacer member 20, that is, the internal measurement. Further, a mouth portion 22 is formed on the inclined surface 20a, and a blower 23 is disposed in the mouth portion 22.

Since the blower 23 is disposed on the inclined surface 20a, the rotation axis of the fan 23a is not perpendicular, but is inclined toward the front-rear direction of the cooling device 1. Specifically, in the blower 23, the direction of the rotation of the blower 23, that is, the direction of the rotation of the fan 23a, is directed downward, and is inclined forward.

[0069] Hereinafter, the refrigeration equipment 1 of the present embodiment will be described focusing on the supercooling operation 基于 based on the flowchart shown in FIG. 6 and the sequence diagram shown in FIG. Here, the following actions are controlled by the CPU 30 as a control means. In addition, in FIG. 7, the upper part shows a graph, and the lower part shows a sequence diagram. In the upper graph, the horizontal axis represents the transit time, and the vertical axis represents the freezer compartment temperature and temperature sensing. The unit 34 displays the temperature. Further, in the graph, the surface temperature of the frozen object 26 detected by the temperature sensor 34 shown in Fig. 4 is indicated by a broken line, and the indoor temperature of the upper freezing chamber 5 is indicated by a chain line.

[0070] First, the flow of cold air in the normal cooling operation performed in step S10 will be described. Referring to Fig. 4, in the normal cooling operation, a portion of the cold air sent from the cooling chamber 13 to the supply air passage 14 by the blower 32 flows into the upper freezing chamber 5 through the air outlet 28. Further, as described above, in the normal cooling operation, a part of the cold air in the supply air passage 14 is supplied to the ice making chamber 4 (see FIG. 2) and the lower freezing chamber 6, and is supplied to the freezing chamber 3 through the supply air passage 15. .

The cold air that has flowed in from the supply air passage 14 mainly flows into the upper freezing compartment 5 from the mouth portion 22. Further, a part of the cold air which flows in from the supply air passage 14 flows into the upper freezing compartment 5 through the communication port 21. Here, in the normal cooling port, the blower 23 disposed in the mouth portion 22 of the partition member 20 does not operate, but the cool air passes through the periphery of the blower 23 in the stopped state. The cold air supplied to the upper freezing compartment 5 is introduced into the lower freezing compartment 6 located below it. This normal cooling operation is continuously performed until the supercooling operation 吋, that is, the NO in step S11.

Further, in the normal operation described above, the control unit intermittently operates the compressor 31 included in the refrigeration cycle based on the output of the thermometer. Specifically, a thermometer (not shown) is disposed in any one or more of the refrigerating compartment 3, the freezing compartment 4A, and the vegetable compartment 7, and the control mechanism causes the compressor 31 to intermittently operate based on the output of the thermometer. . Thereby, the refrigerating compartment 3, the freezing compartment 4A, and the vegetable compartment 7 are maintained in a predetermined temperature region.

When the step S11 is YES, the user starts the supercooling operation by pressing the operation button or the like provided on the operation panel 27 shown in Fig. 1 . On the other hand, if the user does not press the operation button, step S11 is NO, and the supercooling operation does not start.

[0074] Thereafter, the frozen object 26 is stored in the upper freezing compartment 5 shown in FIG. However, in the present embodiment, as the frozen product 26, meat having a weight of several kilograms or the like can be used. In general, it is not easy to freeze such a large-scale frozen object 26 by subcooling. However, in the present embodiment, the frozen object 26 is frozen in a supercooled state by the cooling method described below.

[0075] If the supercooling operation is started, the period of step S12 is NO, and the predetermined inter-turn α is waited for. Here, it is prescribed that the daytime α is, for example, 20 seconds. And, step S12 becomes YES, and when the predetermined inter-turn ot transition is made to the step [0076] In step S13, defrosting is prohibited. Here, the defrosting action will be described. Specifically, referring to Fig. 2, when the cooling operation is continued, the frost on the air-side heat transfer surface of the cooler 33 is applied to hinder heat transfer and block the air flow path. Therefore, the control means determines the frosting from the decrease in the evaporation temperature of the refrigerant or the like, and starts the defrosting operation for removing the frost applied to the cooler 33. When the defrosting operation is performed, the control unit stops the operation of the compressor 31 and the blower 32, and the air passage shutter 18 is closed. Further, the control mechanism energizes the defrosting heater 19. Then, the frost applied to the cooler 33 and the cooling chamber 13 is melted due to the heat generated by the defrosting heater 19. The water after the frost has melted falls to an evaporation tray (not shown). After the defrosting stroke is completed, the control unit further operates the compressor 31 and the blower 32 to supply cold air to the upper freezing compartment 5.

In the defrosting stroke, as described above, since the compressor 31 is stopped, it is impossible to supply cold air to the upper freezing compartment 5 during the defrosting stroke, and there is concern that the temperature control of the upper freezing compartment 5 is unstable. Further, in the defrosting stroke, since the air inside the cooling chamber 13 is heated by the defrosting heater 19, there is also concern that the temperature control of the upper freezing compartment 5 is unstable. In the present embodiment, in the steps subsequent to step S13, the compressor 31 is continuously operated by prohibiting the defrosting stroke, and the cold air can be continuously supplied to the upper freezing compartment 5. Further, since the defrosting heater 19 does not generate heat by prohibiting the defrosting stroke, the upper freezing compartment 5 is not affected by the heating of the defrosting heater 19. Therefore, in order to achieve an overcooled state, the temperature of the upper freezing compartment 5 can be accurately controlled.

[0078] In step S14, the temperature of the frozen object 26 is detected. That is, referring to Fig. 4, an information input control means for displaying the temperature of the frozen object 26 detected by the temperature sensor 34 is displayed. Since the temperature sensor 34 is a far-infrared thermometer, the temperature sensor 34 detects the temperature near the surface of the object 26 to be frozen.

When the step S15 is NO, the temperature of the object 26 to be detected detected by the temperature sensor 34 is equal to or higher than a predetermined temperature β. Here, β is a preset first temperature and is set to, for example, -3 °C. Therefore, the control mechanism shifts to step S16, and the temperature sensor 34 detects the temperature of the frozen object 26, and gradually cools the frozen object 26 in order to maintain the intermittent operation of the compressor 31. In the present embodiment, when the temperature of the frozen product 26 is equal to or higher than the temperature β, the compressor 31 is intermittently operated to suppress the cooling ability, and the temperature of the object 26 to be frozen is not excessively lowered.

On the other hand, when the step S15 is YES, the temperature of the frozen object 26 detected by the temperature sensor 34 is lower than a predetermined temperature. In this case, the process shifts to step S17, and the control mechanism causes the compressor 31 to continuously operate. In the sequence diagram of Fig. 7, the timing of the continuous operation of the compressor 31 is indicated by T11. Referring to FIG. 2, the control mechanism cools the air inside the cooling chamber 13 by the cooler 33 by continuously operating the compressor 31. Further, at the same time, the control mechanism causes the blower 32 to continuously operate, and supplies the cool air cooled inside the cooling chamber 13 to the upper freezing compartment 5. Thereby, with reference to Fig. 4, cold air is continuously supplied to the frozen object 26 stored in the upper freezing compartment 5. Thereby, the cooling ability of the cooled object 26 is increased.

Here, in step S17, the control means causes the compressor 31 to continuously operate, but the blower 23 is not operated. The reason for this is to suppress the cooling ability in this step, and the temperature of the object to be frozen 26 is not lowered too fast.

When the step S18 is NO, the temperature detected by the temperature sensor 34 is equal to or higher than a predetermined temperature γ. Here, γ is a second temperature set in advance and is a temperature lower than the above β. The specific value of γ is set to, for example, -4.5 °C. In this case, the control unit shifts to step S19, and in order to maintain the current situation, the temperature sensor 34 detects the temperature of the frozen object 26, and the compressor 31 is continuously operated to cool the frozen object 26.

On the other hand, if the step S18 is YES, the temperature of the frozen object 26 detected by the temperature sensor 34 is lower than the temperature γ. In this case, the process shifts to step S20, and the control mechanism causes the blower 23 to continuously operate. In the sequence diagram of Fig. 7, the timing of the continuous operation of the compressor 31 is indicated by T12.

Specifically, in this step, the control mechanism continuously operates the compressor 31, and the blower 23 continuously operates. Therefore, referring to Fig. 5, the blower 23 is operated by the control means to blow cold air to the object 26 to be frozen. Further, a part of the cold air blown by the blower 23 is circulated through the air passages 40, 41, 42, and 43 to cool the frozen object 26.

When the compressor 31 is operated by the control means, the blower 23 is also operated, so that the amount of cold air supplied to the object 26 to be frozen can be increased, and the surface temperature of the object 26 to be frozen can be rapidly lowered. In the case of freezing the frozen object 26, it is most suitable to supercool the entire frozen product 26, but in the case where the frozen product 26 is, for example, a meat of several kilograms, it is cooled until the central portion thereof is cooled. difficult. Even in such a case, according to the present embodiment, by causing supercooling in the vicinity of the surface of the object 26 to be frozen, it is possible to suppress blood loss of the defrosted sputum.

When the step S21 is NO, the temperature of the frozen object 26 detected by the temperature sensor 34 is equal to or higher than a predetermined temperature δ. Here, δ is a third temperature set in advance and is a temperature lower than the above γ. The specific value of δ is set to, for example, -20 °C. Therefore, the process goes to step S22, and the control mechanism determines whether it is the initial cooling. After the operation, the specified time ε has elapsed.

On the other hand, if the temperature of the frozen object 26 detected by the temperature sensor 34 is lower than the temperature δ, since it is judged as YES in step S21, it is determined that the frozen object 26 is completely cooled, and the transition to the allowable division is performed. Step S24 of the frost step.

Further, if the predetermined time ε has elapsed, since the decision step S22 is YES, the process shifts to the step 24 of the allowable defrosting step. Here, as an example, it is 25 hours. On the other hand, if the predetermined interval ε has not elapsed, since step S22 is ΝΟ, the process proceeds to step S23, and the control mechanism maintains the status quo. That is, by continuously operating the compressor 31, the cooled cold air is blown toward the object 26 by the blower 23.

[0090] In step S24, it is judged that the frozen object 26 has been cooled, and the defrosting step is permitted. That is, by applying the above method, by heating the defrosting heater 19, the frost applied to the surface of the cooler 33 is dissolved and removed.

Thereafter, the process proceeds to step S25, and the supercooling operation is ended to shift to the normal cooling operation. That is, referring to Fig. 2, the control means controls the compressor 31 such that the indoor temperature of each storage compartment of the refrigeration apparatus 1 is a predetermined temperature.

[0092] The structure and operation of the refrigeration apparatus 1 of the present embodiment have been described above.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

Claims

claims

[Claim 1] A refrigeration equipment, characterized in that it includes:

Freezer compartment, used to store frozen items;

The refrigeration cycle system is composed of a compressor, a condenser, a throttling device, and an evaporator connected in order, and the cold air supplied to the freezing chamber is cooled by the evaporator;

The first air blower is used to send the cold air to the freezing chamber; the second air blower is used to blow the cold air blown by the first air blower to the frozen object;

A temperature detection mechanism is used to detect the temperature of the object to be frozen; a control mechanism is used to control the actions of the refrigeration cycle system and the second air blower based on the output of the temperature detection mechanism.

[Claim 2] The refrigeration equipment according to claim 1, further comprising:

A placing plate for placing the object to be frozen inside the freezing chamber, the placing plate having a plurality of holes, the freezing chamber being divided into a third section located above the placing plate. 1 area and a 2nd area located below the placement plate, the second air blower sends part of the wind into the 2nd area through the hole of the placement plate.

[Claim 3] The refrigeration equipment according to claim 2, wherein a partition member is provided at the upper end of the freezing chamber, and a separation air path is formed between the partition member and the top of the freezing chamber, so The spacing member is provided with a communication port and an opening portion, and the air blower is arranged on the opening portion.

4. The refrigeration equipment according to claim 3, wherein the rear portion of the partition member is formed with an inclined surface that is gradually inclined downward toward the rear, and the opening is formed on the inclined surface.

[Claim 5] The refrigeration equipment according to claim 2, characterized in that, the freezing chamber is formed with: a first air passage, which is supplied by the cold air delivered by the second air blower in the first area. ; A second air passage formed by the cold air entering the second area from the first area through the hole of the mounting plate;

A third air passage enters the third air passage from the second area through the hole of the mounting plate. Said cold air formation in zone 1; and

A fourth air path is formed by the cold air returned from the first area to the second air blower through the communication port.

6.

A subcooling control method for refrigeration equipment, characterized in that the refrigeration equipment as described in any one of claims 1 to 5 is used; the subcooling control method includes: when subcooling is in operation, the control mechanism is controlled by the temperature When the temperature of the frozen object detected by the detection mechanism is lower than the set first temperature, the compressor of the refrigeration cycle system is continuously operated; when the temperature detected by the temperature detection mechanism When the temperature of the object to be frozen is lower than the set second temperature, the second air blower is operated; wherein the second temperature is lower than the first temperature.

The subcooling control method of refrigeration equipment according to claim 6, wherein defrosting operation is prohibited while the compressor is continuously operated in the subcooling operation. The subcooling control method of refrigeration equipment according to claim 7, characterized in that the control mechanism causes the compressor to operate intermittently during a certain period after the subcooling operation is started.

The subcooling control method of refrigeration equipment according to claim 8, characterized in that, during the subcooling operation, defrosting is prohibited after a prescribed time; if the temperature of the frozen object detected by the temperature sensor is not lower than the predetermined Keep the compressor in intermittent operation at the set first temperature; if the temperature sensor detects that the temperature of the frozen object is lower than the preset first temperature, keep the compressor in continuous operation.

The subcooling control method of refrigeration equipment according to claim 9, characterized in that if the temperature of the frozen object detected by the temperature sensor is lower than the preset first temperature, the compressor is kept running continuously, and at the same time, the control The mechanism disables the second blower.

The subcooling control method of refrigeration equipment according to claim 6, characterized in that if the temperature detected by the temperature sensor is not lower than the preset second temperature, the compressor is kept running continuously; if the temperature detected by the temperature sensor is at Lower than the preset second temperature γ, the compressor is kept running continuously, and at the same time, the control mechanism keeps the second air blower running continuously.

[Claim 12] The subcooling control method of refrigeration equipment according to claim 6, characterized in that the control mechanism is configured to operate when the temperature of the object to be frozen detected by the temperature detection mechanism is lower than the required temperature. When the second temperature is set to a lower third temperature, the defrosting operation is allowed.

[Claim 13] The subcooling control method of refrigeration equipment according to claim 12, characterized in that if the temperature detected by the temperature sensor is not lower than the set third temperature, the compressor and the air blower are kept running continuously; If the temperature detected by the temperature sensor is lower than the third temperature, it is determined that the object to be frozen is completely cooled and the defrosting step is permitted; wherein the third temperature is lower than the second temperature.