JPH08145530A - Defrosting chamber - Google Patents

Abstract

PURPOSE: To carry out defrosting in a short time, and keep quality of a frozen cake after defrosting by starting operation of a circulation fan as a storage chamber temperature sensitive device in a good thermally conductive box detects the temperature to be lowered to a predetermined temperature, and continuously operating the circulation fan until the defrosting operation is completed. CONSTITUTION: There is used as a storage chamber 6 an inside space defined by a thermally conductive box 4 disposed in a heat insulation box 1. There is provided a temperature sensor 19 in the vicinity of a suction inlet 17 for sucking air in the storage chamber 6 as a temperature sensing device for detecting temperature in the storage chamber 6. Once a frozen cake being an article to be defrosted is carried in, the temperature in the storage chamber 6 is steeply lowered because the frozen cake is at about -20 deg.C. Accordingly, once a predetermined time has elapsed since the frozen cake was carried in, the temperature becomes at least the lowest temperature in a normal cycle to detect the frozen cake to be carried in. Thereafter, a circulation fan 7 is continuously operated during the defrosting of the cake, and at the time the defrosting is completed the operation of the fan is interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thaw cabinet for thawing frozen cakes and the like.

[0002]

2. Description of the Related Art As a prior art prior to the present invention, for example, Japanese Patent Laid-Open No. 2-279972 (F25D 13/0).
In 0), a heat conducting box is disposed inside the storage body formed by the heat insulating wall at a distance from the heat insulating wall, and the inside of the heat conducting box serves as a storage chamber, and Disclosed is a cooling storage which is provided with a cooling means for indirectly cooling the storage in the space between the heat insulating box and the heat conducting box. Inventions that prevent condensation are described.

[0003]

When the frozen cakes and the like are put into the cold storage in the weight and thawed, the weights are piled up and the storage chamber has a high humidity. There was a problem that the generated condensed water of dropping weight dripped onto the cake and the quality of the cake was significantly impaired. Also,
In the case of the indirect cooling method as described above, there is a problem that the thawing time is long because of the natural convection method in the storage chamber.

The present invention has been made in view of the above-mentioned problems, and provides a thawing chamber which is capable of completing thawing in a short time and maintaining the quality of frozen cake after thawing.

[0005]

As a means for achieving the above object, in claim 1, a heat insulating box made of a heat insulating material is provided, and a predetermined space is provided inside the heat insulating box. A heat conducting box whose inside is a storage chamber, a cooler and a cooling fan provided between the heat conducting box and the heat insulating box, and a space provided in the heat conducting box. A duct, a circulation fan provided in the duct, and a temperature sensing device provided in the heat conducting box for detecting a temperature drop in the storage chamber, and the temperature sensing device has dropped to a predetermined temperature. The present invention provides a defrosting store that detects such a situation and starts the operation of the circulation fan, and controls the continuous operation until the end of defrosting.

According to the invention of claim 2, a heat-insulating box formed of a heat insulating material, and a heat-conducting box provided inside the heat-insulating box with a predetermined space therebetween and having a storage chamber inside thereof. A cooler and a cooling fan provided between the heat conducting box and the heat insulating box, a duct provided at a distance in the heat conducting box, and a circulation provided in the duct. A fan, a temperature-sensing device that is provided in the heat conducting box and detects the temperature in the storage chamber, and an outside-air temperature detecting device that detects the outside-air temperature,
It is intended to provide a thawing chamber which is controlled so as to determine the thawing time depending on the amount of the object to be thawed and the outside air temperature.

[0007]

According to the invention of claim 1, when the object to be defrosted is carried into the storage chamber, the temperature in the storage chamber decreases. Therefore, when the temperature-sensing device provided in the storage chamber has dropped to a predetermined temperature, it is determined that the object to be defrosted has been carried in, and the circulation fan is continuously operated from this detection until the end of defrosting. This prevents condensation on the object to be thawed during thawing, and
Since it is indirect cooling, it is possible to prevent the object to be thawed from drying.

According to the second aspect of the present invention, the load amount of the object to be thawed is detected by the temperature decrease in the storage chamber, and the outside air temperature is detected by the outside air temperature detecting device, and the load amount and the outside air temperature are detected. Since the thawing time is determined by, the object to be thawed can be thawed in an accurate thawing time, and thawing in a short time becomes possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a thawing chamber equipped with the present invention, FIG. 2 is a vertical sectional view of the thawing chamber of the present invention, and FIG. 3 shows a temperature change when a cake or the like is thawed in the thawing chamber of the present invention. It is a figure. Reference numeral 1 denotes a heat insulating box formed by a heat insulating wall 2, which is configured by filling a heat insulating material between both the inner and outer boxes, and a front opening portion thereof is openably and closably closed by a door body 3 formed of the heat insulating material. . Inside this heat-insulating box 1, a heat-conducting box 4 having an open front surface is provided, which is spaced apart from all the inner wall surfaces of the heat-insulating wall 2.
A cold air passage 5 is formed between the heat conduction box 4 and the heat insulation box 1. An inner space defined by the heat conducting box 4 is a storage chamber 6, and a circulation duct 8 accommodating and circulating a circulation fan 7 for circulating the air in the storage chamber 6 is provided on a top surface and a back surface of the storage chamber 6. It is provided. It should be noted that the storage chamber 6 is formed into two upper and lower chambers, and a plurality of shelves 21 are arranged in the vertical direction in the storage chamber 6. Further, a weight (storage case) that stores a load of a frozen cake or the like to be thawed is placed on the shelf 21.

The cold air passage 5 formed between the heat insulating box 1 and the heat conducting box 4 has a cooler 9 at the top of the heat insulating box 1.
And a cooling fan 10 are provided respectively, and for the purpose of preventing a short cycle, the heat insulation box side cold air passage 5A having the cooler 9 and the cooling fan 10 and the heat conduction box side cold air formed on the heat conduction box 4 side. It is partitioned from the passage 5B by a partition plate 11. Also, these heat insulation box side, heat conduction box side cold air passage 5A,
5B communicates with the top and bottom surfaces, and the cooling fan 10 is provided facing the communication part on the top surface side.

A machine room 15 is provided above the heat insulation box 1 and comprises a condenser 12 and a compressor 13 which together with the cooler 9 constitute a refrigeration cycle, and a condenser cooling fan 14 which cools them. Has been. This machine room 15
Is provided with a machine room door 16 that opens and closes in the vertical direction on the front side, and this machine room door 16 introduces cooling air into the machine room 15 from the gap between the lower end of the machine room door 16 and the heat insulating box 1. Reference numeral 20 denotes an outside air temperature detection device (outside air temperature sensor) that detects the outside air temperature.

Further, the circulation duct 8 is provided in the heat conducting box 4
Is installed on the top surface and the back surface of the above, and a suction port 17 for sucking the air in the storage chamber 6 is formed at a position facing the door body 3 in the top surface side circulation duct 8A, and the suction port 17 is faced to the above-mentioned. The circulation fan 7 is attached. In addition, a plurality of discharge ports 18 for discharging air into the storage chamber 6 are formed in the rear circulation duct 8B at predetermined intervals. Further, in the vicinity of the suction port 17, a temperature sensor 19 as a temperature sensing device for detecting the temperature inside the storage chamber 6 is provided.

The gist of the present invention having the above structure will be described with reference to FIG. First, in the unloaded state, when the set temperature is 5 ° C., the temperature changes within the range of 5 ° C. ± 2 ° C. Next, when the load, that is, the frozen cake that is the object to be thawed is carried in, the temperature inside the storage chamber 6 rapidly decreases because the frozen cake is cooled at around -20 ° C. Therefore, after the frozen cake is carried in and the point A in FIG. 3 elapses, the temperature becomes lower than the minimum temperature during the normal cycle (in this case, + 3 ° C.),
It is possible to detect that a frozen cake has been loaded.
After that, while the frozen cake is being thawed, the circulation fan 7 is continuously operated during the thaw to set the air temperature in the storage chamber 6 to, for example, 5
When the temperature converges to ± 2 ° C, the thawing is complete and the fan operation is stopped. As described above, it is possible to prevent the dew condensation water from dripping on the frozen cake during the thawing of the frozen cake, and to shorten the thawing time. Furthermore, because of the indirect cooling method, keep the inside of the storage chamber 6 at high humidity. You can Thus, the frozen cake can be thawed in high quality.

Next, a description will be given of an embodiment in which the thaw time is determined by the amount of the object to be thawed, that is, the frozen cake. The operating rate N (load amount) after the frozen cake is loaded

[0015]

[Equation 1]

Then, the thawing time is

[0017]

[Equation 2]

It is represented by However, T is the outside air temperature.
When calculated by the above formula 2, for example, when the outside air temperature is 30 ° C. and the full state (operating rate is 25%), 0, 32 (1, 25 × 30 ° C.-25%) = 4 h, and the appropriate thawing time is 4 hours. Become.

This time is 4 hours from the time point A since the point A in FIG. 3 is the time point when the frozen cake is detected. As described above, the optimum thawing time can be determined by the load amount from the operating rate and the outside air temperature. The circulation fan 7 is continuously operated during this thawing time, and the above-mentioned mathematical formulas are formulas calculated by experiments.

[0020]

As described above, according to the first aspect of the present invention, since the stored material is detected at the temperature in the storage chamber and the circulating fan is continuously operated from the detected storage material to the end of the thawing, the frozen cake is being thawed. In addition, dew condensation on the frozen cake and the container for storing the weight and the like can be prevented, and the dew condensation water can be prevented from dripping on the frozen cake and the thawing time can be shortened. Furthermore, because of the indirect cooling method, the storage chamber can be kept at high humidity. Thus, the frozen cake can be thawed in high quality.

According to the second aspect of the invention, since the optimum defrosting time can be determined by detecting the outside air temperature and the load amount of the defrosted object, it is possible to thaw the defrosted object with an accurate defrosting time. You can For this reason, it is possible to prevent wasteful thawing time, enable thawing in a short time, and prevent deterioration of the quality of the thawing object because there is no unnecessary thawing time.

[Brief description of drawings]

FIG. 1 is a perspective view of a thawing cabinet equipped with the present invention.

FIG. 2 is a vertical cross-sectional view of a thawing cabinet equipped with the present invention.

FIG. 3 is a diagram showing a thawing time, a product temperature of a frozen cake, and a temperature inside a storage chamber when the present invention is carried out.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation box 4 Heat conduction box 6 Storage room 7 Circulation fan 8 Duct 9 Cooler 10 Cooling fan 19 Temperature sensing device 20 Outside air temperature detection device

Claims (2)

[Claims] 1. A heat-insulating box formed of a heat insulating material, a heat-conducting box provided inside the heat-insulating box at a predetermined interval, and the inside of which serves as a storage chamber, and the heat-conducting box. And a cooling fan provided between the heat insulation box and the heat insulation box, a duct provided at a distance in the heat conduction box, a circulation fan provided in the duct, and the heat conduction path. The temperature sensing device is provided in the box and detects a temperature decrease in the storage chamber. The temperature sensing device detects that the temperature has dropped to a predetermined temperature, starts the operation of the circulation fan, and continuously operates until the end of thawing. A defroster characterized by being controlled so that 2. A heat-insulating box formed of heat-insulating material, a heat-conducting box provided inside the heat-insulating box with a predetermined space, and the inside of which serves as a storage chamber, and the heat-conducting box. And a cooling fan provided between the heat insulation box and the heat insulation box, a duct provided at a distance in the heat conduction box, a circulation fan provided in the duct, and the heat conduction path. Controlled to determine the thawing time according to the amount of the object to be defrosted and the outside air temperature, which consists of a temperature sensing device installed in the box that detects the temperature inside the storage room and an outside air temperature detection device that detects the outside air temperature. Thaw store characterized by