JPH0436564A - Defrosting control device in defrosting device - Google Patents

Abstract

PURPOSE:To enable a defrosting state for a cooking to be attained by a method wherein a standard defrosting operation is carried out after elapsing a maintained time of the first set temperature, and when a forced switch is turned on, a forced defrosting is carried out and finally the third set temperature is maintained. CONSTITUTION:After a time of timer in which a set temperature of a defrosting device 1 is kept at T1 elapses a time M1, a control circuit 22 keeps it to becomes a set temperature T2. In addition, after a time of the timer elapses a time M2, the timer time is changed to a limitless state. The control circuit 22 keeps a temperature of the defrosting device at a set temperature T3. Then, as the timer time is M3 under an inputting of the forced switch 26, the control circuit 22 turns ON or OFF the heater and freezing cycle is response to a result of sensing of temperature sensing means 2, keeps the defrosting device at a set temperature T4 so as to perform a forced defrosting operation. After the time M3 elapses, it keeps the defrosting device to the set temperature T3 as the forced defrosting is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a thawing chamber for allowing frozen items, etc., carried into the thawing chamber to thaw without releasing the flavor components of the food. I can tolerate it and decompress it.
The present invention relates to a control device for a thawing warehouse configured to forcibly thaw the frozen food before cooking in order to improve the workability of cutting the frozen food after ripening.

Conventional technology The defrosting device in conventional refrigerators is
A method is known in which the temperature is maintained at 0 degrees or higher and the temperature is gradually thawed over a long period of time.

Problems to be Solved by the Invention However, although there is no problem with thawing at a relatively high temperature at the beginning of thawing, maintaining the same temperature at the end of thawing may lead to spoilage of the food and the umami components of the food may be lost to moisture. There is an inconvenience that the discharge can be completed at the same time.

When defrosting at a relatively low temperature, there is a disadvantage that it takes a long time to defrost.

On the other hand, a method is conceivable in which the temperature in the thawing chamber is controlled by a computer to thaw the food at an appropriate temperature based on the type and amount of food, but in this case, the disadvantages are that the device becomes complicated and it is difficult to handle.

Therefore, in view of the drawbacks of the prior art, the present applicant has invented a control device that can set the inside of the thawing chamber at a temperature suitable for thawing using a relatively simple device (Utility Application No. 01-48, 768).

However, when the ripening temperature is around 0°C, there is a problem that the food becomes firm and difficult to cut with a knife or the like.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a control device that has a relatively simple structure but can control the thawing temperature, and can also forcefully thaw foods to make cooking easier when ripened for a long time.

A means for solving the problem, that is, the present invention, is a thawing warehouse for gradually thawing objects to be thawed by indirectly or directly blowing hot air or cold air into the thawing chamber. and means t for setting n (n>2) set temperatures τ.
i, a predetermined time corresponding to the setting means, and an open setting temperature T of 1.
a set of (n-1) timer means for maintaining tn; a comparison circuit for comparing the detected temperature t and the set temperature τ1;
It consists of a control circuit that turns on and off the operation of the heater or cooler according to the output from the comparison circuit, and for a predetermined period of time.
After the elapsed time, change the set temperature and set time to Tl+11 and Mll.
A standard defrosting system configured to switch to 1 and ultimately maintain a set temperature ti, and a forced switch O using the temperature detection means, comparison circuit, and control circuit.
When set to N, set temperature Ti. , with the set time. This objective is achieved by a thawing control device for a thawing warehouse that performs forced thawing, which is configured to allow the comparison circuit and the control circuit to operate at a certain time, and return the set temperature to Ti after the lapse of time Mi.

For production In the case of standard decompression, the procedure is as follows.

The thawing temperature is set via the temperature setting means ti and the timer means mi (as n-1), for example Tl l Tl +
Ih is set, and the time is set to, for example, Ml and L, and thawing is started.

Then, during the first Mi time, the thawing operation is performed at the set temperature.

Each cooling means and heater operates to maintain the set temperature Ti, but a temperature detection means installed in the thawing chamber detects the temperature t inside the thawing chamber, and a comparison circuit compares this with the set temperature Ti. and the comparison result is transmitted to the control circuit. The control circuit then controls the operation of the cooling means and heater.

After the predetermined time Mi has passed, the set temperature changes from T1 to Ti, the timer time changes from H to h, and for 8 hours, the control circuit controls the cooling means and Control timers.

After a predetermined period of time has elapsed, the set temperature changes from 0 to τ, the timer time changes from 0 to unlimited, and the control circuit operates to maintain the temperature inside the thawing chamber. Control means and timers.

The case of forced thawing is as follows.

First, it is assumed that the thawing temperature is set to T12 and M.

The heater operates as described above, but is controlled by comparing the temperature t detected by the temperature detection means with the set temperature T4.

The control circuit maintains the temperature inside the thawing chamber at T4.

After one hour has elapsed, the set temperature is returned to normal and this state is maintained.

Embodiments The present invention will be explained in detail below according to embodiments shown in the drawings.

Reference numeral 1 denotes a thawing chamber covered with a casing 2 made of a heat insulating material and a door body 3 made of a heat insulating material. A compressor 5 is installed in the space between the heat panel 4 and the wall surface. Condenser 6
．． An evaporator 8 of a refrigeration cycle, an electric heater 9, and a fan 1 for blowing air are connected in circulation to an expansion valve 7 and an evaporator 8.
0 has been set.

A is a thawing control device that controls the refrigeration cycle of the thawing warehouse 1 and the operation of the electric heater 9, and the thawing control device A
, a temperature detection means 12 installed on the heat transfer panel 4 of the thawing chamber 1, and a detection circuit 14 connected to the temperature detection means 12.
, an amplifier circuit 16 that amplifies the detection output of the detection circuit 14, a detected temperature t input from the amplifier circuit 16, and a set temperature T that can be input from the timer setting and set temperature setting circuit 18.
It consists of a comparison circuit 20 that compares I (defrosting temperature) and a control circuit 22 that controls the operation of each refrigeration cycle and the electric heater 9 according to the output from the comparison circuit 20.

The timer setting and temperature setting circuit 18 has an IT setting means 1. input via setting knobs 24g, 24b, 24c, and 24d. , 11 , 1. , 1. and these temperature setting means t+ * tt + ts, ta
Timer means 111+I11 which works in conjunction with and outputs the set temperature to the comparison circuit 20 for a predetermined period of time! , fils
It consists of

26 is a switch that forces the temperature setting means t4 and the timer means m$ to operate.

Timer means ml; mt has a standard thawing configuration having a function of switching the temperature setting means from tl to ti after a predetermined time has elapsed, and from +tl to ti, and the timer means m
s is a forced defrost configuration having a function of switching the temperature setting means t4 to ti after a predetermined period of time has elapsed.

Although not shown, each timer means mi-h-1 is configured so that it can be set manually.

The operation of the standard defrosting apparatus according to the embodiment of the present invention in the above-described configuration will be explained with reference to the drawings shown in FIGS. 2 and 3.

First, the set temperature τ1. τ1. Ti and timer time, M
Activate the device after inputting t.

Then, the set temperature becomes τ1. It operates when the timer time is set. During this time, the set temperature is maintained at Ti.

Based on the detection result of the temperature detection means 12 installed in the thawing chamber 1, the comparison circuit 20 determines whether the detected temperature t is t<T+.

It is determined whether t-Ti or t>II, and based on the comparison result, the control circuit 22 controls the heater and refrigeration cycle side/OF.
F as shown in Fig. 2 to bring the inside of the thawing chamber to the set temperature T1.

Next, after the time Mi time has elapsed, the set temperature changes from τ1 to Ti, the timer time also changes from 1, and so on, and the control circuit adjusts the inside of the thawing chamber to the set temperature τ under the control described above. maintain it as such.

After a further 8 hours have elapsed, the set temperature changes from Ti to Ti, the timer time changes from h to unlimited, and the control circuit brings the inside of the thawing chamber to the set temperature Ti under the control described above. to maintain without time limit.

After the defrosting is completed, the control circuit is turned off to complete the defrosting.

Next, the operation of the device according to the forced defrosting configuration of this embodiment will be explained with reference to the drawings shown in FIGS. 4 and 5.

By inputting the forced switch 26, the operation is performed with the set temperature being t4 and the timer time being mi. Therefore, for one hour,
The set temperature can be maintained at T4. (T4>T$) Based on the detection result of the temperature detection means 12, the comparison circuit determines whether the detected temperature t is t'>Ti, t-Ti, or 1<τ, and performs control based on the result. The circuit 22 turns on and off the heater and the refrigeration cycle as shown in FIG. 5, maintains the inside of the thawing chamber at the installation temperature τ4, and performs forced thawing.

Next, after one hour has passed, the set temperature changes from Ti to Ti, and the inside of the thawing chamber is
, to be maintained.

In this embodiment, the temperature setting means is a three-step change method and the timer time is a two-step change method, but the present invention is not limited to this. ), any number of levels are acceptable,
Further, the number of timer times may be one (n-1) less than the number of temperature setting means.

Further, in this embodiment, an electric heater is used as the heater, but the heater is not limited to this, and a heat pump type heater may be used in which the refrigerant discharged from the compressor is directly poured into the evaporator via a refrigerant bypass pipe. .

Effects As explained above, although the device according to the present invention has a relatively simple structure, it can gradually thaw the thawing chamber while changing the set time and temperature, thereby releasing the flavor components of the food. There is no.

In addition, it is easy to operate because you can easily transfer the temperature control and defrost by simply setting the temperature.

Furthermore, since the present invention has an additional configuration for forcibly defrosting the food before cooking, it is possible to easily perform cooking such as cutting the defrosted and ripened food without producing flavor components.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the device according to the present invention, 2150 is a flowchart showing the operation of the control circuit in standard thawing, and Fig. 3 shows the relationship between the temperature in the thawing chamber and the operation of the heater and refrigeration cycle in standard thawing. FIG. 4 is a flowchart showing the operation of the control circuit during forced thawing, and FIG. 5 is a time chart showing the relationship between the temperature inside the thawing chamber and the operation of the heater and refrigeration cycle during forced thawing. 1... Thawing chamber 2... Casing 3... Door body 4... Heat transfer panel 5... Compressor 6... Condenser 7... Expansion valve 8... Evaporator 9. ...Electric heater 10... Fan for blowing air 12... Temperature detection means 14... Detection circuit 16... Amplification circuit
20...Comparison circuit 18...Timer setting and temperature setting circuit 22-...Control circuit 24a, 24b,
24c, 24d=-setting knob 26...forced switch

Claims (2)

[Claims] (1) In a thawing warehouse for gradually thawing items by indirectly or directly sending warm air or cold air into the thawing chamber, a temperature detecting means installed in the thawing chamber and n pieces (n
>2) Set temperature T_i and forced thawing temperature T_n_+_
means t_i for setting 1 and maintaining the set temperature T_i for a predetermined time M_i corresponding to the setting means (n-1)
timer means m_i and a timer m_n for maintaining the forced defrosting time M_n; and the forced defrosting timer m_n.
a comparator circuit that compares the detected temperature t and the set temperature T_i, and a comparator circuit that turns on and off the operation of the heater or cooler according to the output from the comparison circuit.
After M_i time has elapsed, standard thawing is performed by switching the set temperature and set time to Ti+1 and M_i_+_1, and when the forced switch is input, the control circuit and comparison circuit control the inside of the thawing chamber to a predetermined level. Forced thawing is performed to maintain the internal temperature at T_n_+_1 for m_n hours, and both standard thawing and forced thawing ultimately reach the set temperature t_
A thawing control device in a thawing warehouse, characterized in that it is configured to maintain n. (2) The thawing control device in a thawing warehouse according to claim 10, wherein the heater is a heat pump that connects a compressor and an evaporator of a refrigeration cycle with a bypass pipe.