KR100800619B1 - Method for controlling driving in a showcase - Google Patents

Abstract

A method of controlling operation of an island type showcase refrigerator is provided to prevent temperature of commodities stored in the refrigerator from rising by operating the refrigerator under continuous refrigeration before turning on a defrost heater. A method of controlling operations of a showcase refrigerator includes a first step(S101~S105) of starting a controlled operation of a showcase refrigerator with a normal cycle stored in the memory of a controller and checking whether a defrost time is set by a user, a second step(S107~S109) of operating the refrigerator with the normal cycle when the defrost time is not changed while changing a cycle corresponding to the defrost time when an input is made by a user, a third step(S111~S113) of operating the showcase refrigerator with a normal cycle or a changed cycle and checking whether elapsed time of operation is reached to a determined time period prior to the start of defrosting, a fourth step(S115~S117) of stopping the controlled operation of showcase refrigerator for performing an operation of the showcase refrigerator under continuous cooling mode for a determined period to prevent temperature of commodities in the showcase refrigerator from being raised if the elapsed time of operation is reached to a time for starting a continuous cooling, and a fifth step(S119~S125) of returning to a controlled operation of the refrigerator after performing defrost process for a determined period or under determined conditions followed by completion of continuous cooling.

Description

{Method for controlling driving in a showcase}

1 is a diagram illustrating a control operation cycle in a conventional refrigeration flat showcase.

2 is a block diagram of a system to which the operation control method of the freezing flat showcase according to the present invention is applied.

3 is a view illustrating a control operation cycle of a refrigeration flat showcase in the present invention.

Figure 4 is a flow chart of a first embodiment showing the operation control method of the freezing flat showcase according to the present invention.

Figure 5 is a flow chart of a second embodiment showing the operation control method of the freezing flat showcase according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110... compressor

120... Condenser

130... Expansion valve

140... evaporator

150... Controller

160... temperature Senser

170... Memory

The present invention relates to a method for controlling the operation of a freezing flat showcase, and more particularly, to a continuous flat cooling operation under a predetermined condition before defrosting to prevent the temperature of a stored product from rising above a reference value during defrosting. It relates to a driving control method.

In general, the freezing flat showcase is to maintain the cooling and freezing while displaying the product so that the ice cream and meat can be seen from the outside, which is made by the cooling circuit of the refrigerant circuit, the refrigeration cycle, especially the evaporator of the refrigerant circuit During the exchange, the temperature is maintained while absorbing heat inside the freezer compartment.

That is, a low temperature is obtained by heat exchange between the evaporator heat and the outside air temperature. At this time, frost is stuck on the surface of the evaporator by the difference between the heat of the evaporator and the outside air temperature. The defrosting operation is performed to remove the frost for a time, and the defrosting operation removes the frost generated on the surface of the evaporator.

Looking at the defrosting operation control method in the conventional refrigeration flat showcase, the defrosting operation time is set by the user in real time or a non-real time with a fixed periodicity by a program, etc., a certain condition such as defrost time during the control operation As soon as the defrosting operation is performed.

However, in the conventional freezing flat showcase, the defrosting operation control method performs the defrosting operation immediately when a predetermined condition such as the defrosting time is performed, and thus the defrosting operation is performed immediately even after the cooling cycle is turned off or on. Since it starts, the temperature of the commodity during defrosting rises above the reference value as shown in FIG.

1 shows an operation control cycle in a conventional refrigeration flat showcase, in which a control cooling operation, a defrosting operation, and a control cooling operation are performed periodically. In this case, as is well known at the time of defrosting, for example, the cooling cycle is turned off. In the case of defrosting, or when defrosting is started shortly after turning on), the temperature of the product during defrosting is raised above the reference value.

Accordingly, the present invention has been proposed to solve various problems occurring during defrosting in the conventional freezing flat showcase as described above,

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling the operation of a freezing flat showcase in which a continuous cooling operation is performed under a predetermined condition before defrosting to prevent a temperature of a stored product from rising above a reference value during defrosting.

The first embodiment of the "operation control method of the frozen flat showcase" according to the present invention for achieving the above object,

A first step of starting a control operation by drawing a basic operation control cycle stored in a memory when the operation start is requested, and checking whether a defrosting operation time is set by a user;

If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps;

A third step of confirming whether or not a predetermined time before defrosting operation is performed while performing a control operation according to the basic operation control cycle or the changed operation control cycle;

A fourth step of stopping the control operation if the defrosting operation is performed before the defrosting operation and the pre-cooling operation for the predetermined time to prevent the temperature rise of the product;

Performing a defrosting operation for a set time or condition after the pre-cooling operation ends, and returning to the control operation if the set time passes or the condition is satisfied, and performs a control operation according to the operation control cycle; do.

According to the first preferred embodiment of the present invention, by performing a pre-cool operation (continuous cooling operation) for a predetermined time before starting the defrosting, by dropping the temperature of the stored goods sufficiently low before starting the defrosting The temperature of the stored product can be prevented from rising, thereby increasing the cold storage function of the product.

According to a second embodiment of the "operation control method of a frozen flat showcase" according to the present invention for achieving the above object,

A first step of starting a control operation by drawing a basic operation control cycle stored in a memory when the operation start is requested, and checking whether a defrosting operation time is set by a user;

If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps;

A third step of confirming whether or not a predetermined time before defrosting operation is performed while performing a control operation according to the basic operation control cycle or the changed operation control cycle;

A fourth step of stopping the control operation and executing a pre-cool operation to prevent a rise in temperature of the product when the third step is confirmed before the defrosting operation;

During the pre-cool operation, the internal temperature is detected, and if the detected internal temperature is lower than or equal to the set temperature, the defrost operation is performed after the pre-cool operation is terminated for a set time or condition, and the set time passes or the condition is satisfied. And returning to the control operation and performing a control operation according to the operation control cycle.

According to the second preferred embodiment of the present invention, by performing a pre-cool operation (continuous cooling operation) before starting the defrosting, by dropping the temperature of the storage product sufficiently low before starting the defrosting the storage goods at the time of defrosting It is possible to prevent the temperature of the rise, thereby increasing the cold storage function of the product.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention. If it is determined that the detailed description of the known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a system configuration diagram to which the operation control method of the refrigeration flat showcase according to the present invention is applied, wherein the configuration of the compressor 110, the condenser 120, the expansion valve 130, the evaporator 140 is a general refrigeration / refrigeration It is the same as the construction of the flat showcase, the operation is also the same as the operation of the normal freezing flat showcase.

Reference numeral 150 controls the entire operation of the freezing flat showcase by drawing out the basic operation control cycle stored in the memory 170, but if the change of the defrosting time is requested by the user during the operation or before the operation start, the existing operation control in response thereto. The controller controls the operation by changing the cycle, and performs a pre-cool operation (continuous cooling operation) before the set defrosting time to prevent the temperature of the stored product from rising above the set temperature during defrosting. A temperature sensor for detecting the temperature in the freezing flat showcase to provide to the controller 150.

Figure 4 is a first embodiment of the "operation control method of the freezing flat showcase" according to the present invention for achieving the above object,

A first step (S101 ˜ S105) of extracting a basic operation control cycle stored in a memory to start a control operation and checking whether a defrost operation time is set by a user when an operation start is requested; If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps S107 to S109; A third step (S111 ˜ S113) of checking whether the defrosting operation is performed before a predetermined time while performing a control operation according to the basic operation control cycle or the changed operation control cycle; A fourth step (S115 to S117) of stopping the control operation if the defrosting operation is performed before the defrosting operation and stopping pre-cooling during the predetermined time to prevent the temperature rise of the product; A fifth step of performing a defrosting operation for a set time or condition after the pre-cooling operation ends, and returning to the control operation if the set time passes or the condition is satisfied (S119); S125).

According to the first embodiment of the present invention, a method of controlling the operation of a frozen flat showcase according to the present invention, first, when operation is requested by the user in step S101, the controller 150 performs basic operation stored in the memory 170 in step S103. Withdraw the control cycle and start operating control. In this case, the control cooling operation during the operation control is performed by driving the compressor 110, and the refrigerant is reduced to the compressor 110 through the condenser 120, the expansion valve 130, and the evaporator 140, and the cooling operation is generally performed. Since the basic operation of the freezing flat showcase, detailed description thereof will be omitted.

While starting the operation control, the controller 150 checks whether a change in the defrost time is requested in real time by the user as in step S105. Here, the defrosting time may be divided into real time or non-real time, and the non-real time means periodically included in the basic operation control cycle, and the real time refers to the case where the defrost time is arbitrarily set by the user during operation or before the start of operation. it means.

If there is no request for changing the defrosting time in real time by the user, the operation of the freezing flat showcase is controlled while maintaining the basic operation control cycle by moving to steps S107 and S111. Set), go to step S109 to change the basic operation control cycle according to the defrost time set by the user and store it in the memory 170, and go to step S111 to control the operation according to the changed operation control cycle. do.

During operation, as in step S113, whether or not a predetermined time before the defrosting operation is periodically checked, and as a result of this check, if it is a predetermined time before the start of the defrosting operation, the control operation is stopped at step S115. The predetermined time is preferably calculated by an experiment, but may be, for example, 10 minutes before or 5 minutes before the start of the defrosting operation.

In the state of stopping the control operation, the pre-cool operation is started as in step S117. Here, the pre-cool operation means not performing the control cooling operation for the predetermined time but performing the cooling operation continuously. When the continuous cooling is performed for a predetermined time, the temperature of the stored product is lower than when the cooling cycle is on as shown in FIG. 3. In other words, the pre-cool operation means that the continuous cooling operation is performed so that the temperature of the stored product is lower than that of the cooling cycle operation.

After the predetermined temperature is lowered sufficiently by the pre-cool operation, the predetermined time passes (S119) and the defrosting operation is performed for a predetermined time or condition to remove frost generated in the evaporator. Here, in the defrosting operation, as shown in FIG. 1, the temperature of the stored product rises above the maximum allowable temperature of the product under certain conditions (when the cooling cycle is turned off or the cooling cycle has just been driven) to prevent product deterioration. However, in the present invention, since the temperature of the product is sufficiently lowered in advance by the pre-cool operation, the temperature of the stored product is prevented from rising above the maximum allowable temperature even during defrosting as shown in FIG. 3. As a result, the temperature of the product during defrosting can be prevented from rising above the reference value, thereby increasing the cold storage function of the product.

When the defrosting operation is finished (S121), the process moves to step S125 to return to the controlled cooling operation to control the cooling operation.

FIG. 5 is a flowchart illustrating a second embodiment of a method for controlling operation of a frozen flat showcase according to the present invention. When a start of operation is requested, a basic operation control cycle stored in a memory is extracted to start a control operation. First steps S201 to S205 confirming whether or not the defrosting operation time is set; If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps S207 to S209; A third step (S211 to S213) for checking whether a defrost operation is performed before a predetermined time while performing a control operation according to the basic operation control cycle or the changed operation control cycle; A fourth step (S215 to S217) of stopping the control operation and executing a pre-cool operation to prevent the temperature rise of the product if the check result of the third step is a predetermined time before the defrosting operation; During the pre-cool operation, the internal temperature is detected, and if the detected internal temperature is lower than or equal to the set temperature, the defrost operation is performed after the pre-cool operation is terminated for a set time or condition, and the set time passes or the condition is satisfied. When the control operation returns to the control operation, a control operation is performed according to the operation control cycle (S219 to S227).

According to the second embodiment of the "operation control method of the freezing flat showcase" according to the present invention, if the start of operation is requested by the user in step S201, the controller 150 stores the basic information stored in the memory 170 in step S203. Withdraw the operation control cycle to start operation control. In this case, the control cooling operation during the operation control is performed by driving the compressor 110, and the refrigerant is reduced to the compressor 110 through the condenser 120, the expansion valve 130, and the evaporator 140, and the cooling operation is generally performed. Since the basic operation of the freezing flat showcase, detailed description thereof will be omitted.

While starting the operation control, the controller 150 checks whether a change in the defrost time is requested in real time by the user as in step S205. Here, the defrosting time may be divided into real time or non-real time, and the non-real time means periodically included in the basic operation control cycle, and the real time refers to the case where the defrost time is arbitrarily set by the user during operation or before the start of operation. it means.

If there is no request for changing the defrosting time in real time by the user, the operation of the freezing flat showcase is controlled while maintaining the basic operation control cycle by moving to steps S207 and S211. Set), go to step S209 to change the basic operation control cycle according to the defrost time set by the user and store it in the memory 170, and go to step S211 to control the operation according to the changed operation control cycle. do.

During operation, as in step S213, it is periodically checked whether a predetermined time before defrosting operation is performed. If the result of the check is before a predetermined time before starting defrosting operation, the control operation is stopped by moving to step S215. The predetermined time is preferably calculated by an experiment, but may be, for example, 10 minutes before or 5 minutes before the start of the defrosting operation.

In the state where the control operation is stopped, the pre-cool operation is started as in step S217. Here, the pre-cool operation means not performing a controlled cooling operation but performing a continuous cooling operation. When the continuous cooling operation is performed, the temperature of the stored product is lower than that at the cooling cycle on as shown in FIG. 3. In other words, the pre-cool operation means that the continuous cooling operation is performed so that the temperature of the stored product is lower than that of the cooling cycle operation.

When the pre-cool operation is started, the temperature inside the refrigerator is detected using the temperature sensor 160 as in step S219, and it is checked whether the detected temperature inside the refrigerator is less than or equal to the set temperature as in step S221. Here, it is preferable to determine the set temperature within a range for preventing the temperature of the stored product from rising above the maximum allowable temperature even if the defrosting operation is performed in advance by experiment. When the detection temperature of the check result of the step S221 is lower than the set temperature, go to step S223 to end the pre-cool operation and immediately start the defrost operation to remove the frost generated in the evaporator.

Here, in the defrosting operation, as shown in FIG. 1, the temperature of the stored product rises above the maximum allowable temperature of the product under certain conditions (when the cooling cycle is turned off or the cooling cycle has just been driven) to prevent product deterioration. However, in the present invention, since the temperature of the product is sufficiently lowered in advance by the pre-cool operation, the temperature of the stored product is prevented from rising above the maximum allowable temperature even during defrosting as shown in FIG. 3. As a result, the temperature of the product during defrosting can be prevented from rising above the reference value, thereby increasing the cold storage function of the product.

In this case, when the start time of the defrosting operation is determined by the temperature inside the defrost, the defrosting operation start time is determined by the detection temperature inside the refrigerator regardless of the defrosting operation start time. In other words, when the defrosting operation temperature is lower than or equal to the set temperature, defrosting operation is immediately started even if the defrosting operation time does not arrive.In contrast, when the defrosting operation time when the defrosting operation temperature does not reach or below the set temperature, The defrosting operation is delayed until the inside temperature is below the set temperature, and the defrosting operation is started when the inside detection temperature is below the set temperature.

Next, it is checked in step S225 whether the defrosting operation is finished, and when the defrosting operation is completed, the process moves to step S227 to return to the controlled cooling operation to control the cooling operation.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

According to the present invention as described above, there is an advantage that the temperature of the stored product during the defrost can be prevented from rising above the reference value by performing a continuous cooling operation under a predetermined condition before defrosting.

In addition, there is an effect that can increase the cold storage function of the storage goods due to the advantages as known.

Claims (4)

In the method of controlling the operation of the freezing flat showcase, A first step of starting a control operation by drawing a basic operation control cycle stored in a memory when the operation start is requested, and checking whether a defrosting operation time is set by a user; If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps; A third step of confirming whether or not a predetermined time before defrosting operation is performed while performing a control operation according to the basic operation control cycle or the changed operation control cycle; A fourth step of stopping the control operation if the defrosting operation is performed before the defrosting operation and the pre-cooling operation for the predetermined time to prevent the temperature rise of the product; Performing a defrosting operation for a set time or condition after the pre-cooling operation ends, and returning to the control operation if the set time passes or the condition is satisfied, and performs a control operation according to the operation control cycle; Operation control method of the refrigeration flat showcase, characterized in that. The method of claim 1, wherein the pre-cool operation is an operation of continuously performing cooling. In the method of controlling the operation of the freezing flat showcase, A first step of starting a control operation by drawing a basic operation control cycle stored in a memory when the operation start is requested, and checking whether a defrosting operation time is set by a user; If there is no change in the defrost time as a result of the checking, the control operation is performed while maintaining the stored basic operation control cycle, and when the change of the defrost time is requested by the user, the second control unit changes the operation control cycle according to the defrost time set by the user. Steps; A third step of confirming whether or not a predetermined time before defrosting operation is performed while performing a control operation according to the basic operation control cycle or the changed operation control cycle; A fourth step of stopping the control operation and executing a pre-cool operation to prevent a rise in temperature of the product when the third step is confirmed before the defrosting operation; During the pre-cool operation, the internal temperature is detected, and if the detected internal temperature is lower than or equal to the set temperature, the defrost operation is performed after the pre-cool operation is terminated for a set time or condition, and the set time passes or the condition is satisfied. And a fifth step of returning to the control operation to perform a control operation according to the operation control cycle. 4. The method of claim 3, wherein the pre-cool operation is an operation of continuously performing cooling.

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