KR100443317B1 - Refrigeration showcase - Google Patents

Abstract

The present invention relates to a refrigerated showcase, and more particularly, to classify the refrigerator compartment according to the type of products stored such as fresh cream cake or butter cake, and to keep the stored product fresh for a long time by keeping the temperature and humidity different for each refrigerator compartment. It is about a refrigerated showcase.

In the refrigerator showcase of the present invention, a refrigerator having a glass for displaying the goods displayed on the front part and a door for entering the goods inside the rear part and a compressor for keeping the temperature of the refrigerator room constant at a low temperature. And a refrigerating showcase comprising a condenser, an expansion valve, and an evaporator, the partition which divides the refrigerating compartment into a first refrigerating compartment and a second refrigerating compartment, a first temperature sensor for detecting a temperature of the first refrigerating compartment, and a second refrigerating compartment. A second temperature sensor for detecting a temperature, a humidity sensor for detecting humidity of the refrigerating compartment, and at least one cooling fan for allowing cold air generated from the evaporator to flow into the refrigerating compartment, the evaporators being in parallel A first evaporator for refrigerating the connected first refrigerating compartment and a second evaporator for refrigerating a second refrigerating compartment, wherein the expansion valve is configured to be adapted to A first expansion valve and a second expansion valve provided on an upstream side of the refrigerant flow to the erection, an on / off valve provided on an upstream side of at least one of the first or second expansion valves, and a defrost heater installed on the expansion valve. And a water tank for storing condensed water in the refrigerating chamber, an evaporation heater for heating the water tank, an evaporation fan for transmitting moisture evaporated by the evaporation heater, and a signal from the sensors. And a control unit for controlling the cooling fan and the on / off valve and each heater.

Description

Refrigerated Showcase {REFRIGERATION SHOWCASE}

The present invention relates to a refrigerated showcase, and more particularly, according to the type of products to be stored, such as fresh cream cake or butter cake, to classify the storage refrigerator compartment, and to keep the temperature and humidity different for each refrigerator compartment to keep the stored product fresh for a long time. It is about a refrigerated showcase that can be preserved.

In general, a refrigerated showcase is a product having a refrigeration system installed so that food or other items can be freshly stored and stored for a long time. The refrigerated showcase is classified into a refrigerated or frozen showcase according to the stored food. Showcases are mainly installed in supermarkets, large stores, shopping centers, etc., so that the manager can take out the food from the inside when the consumer selects the product to buy while looking inside.

In addition, the showcase is horizontally installed to display and take out goods upwards and vertically to display and take out goods to the front. In addition, the door is installed at the entrance and there is an open type to form an air curtain without installing the door.

6A and 6B are schematic views of a control block and a refrigerating system of a refrigerating system of a conventional refrigerating showcase, wherein the refrigerating system includes a compressor, a condenser, an expansion valve, and an evaporator, and a control unit for controlling the same is a temperature sensor installed in a refrigerating compartment. The temperature value and the set temperature value are compared with each other, and when the temperature is higher than the set temperature, refrigeration is performed by driving a compressor and driving a cooling fan for circulating cold air generated by the evaporator. That is, when the temperature of the refrigerating compartment is higher than the set value, the compressor and the cooling fan are driven, and the refrigerant compressed by the compressor at high temperature and high pressure is condensed in the condenser, and the refrigerating compartment is kept at a low temperature through the expansion valve and the evaporator.

However, the conventional refrigeration showcase as described above has only one refrigeration chamber, so that various kinds of refrigeration conditions may be stored in the same refrigeration chamber. Therefore, when simultaneously storing products with different refrigerated storage conditions, such as temperature or humidity, products that do not meet the storage conditions had a problem of easily damaged. In addition, if it is desired to store products with different storage conditions separately, it is necessary to install separate showcases, resulting in excessive costs and inefficient use of space.

In addition, the conventional showcase has a problem in that the production cost is increased because an additional humidity maintenance apparatus is additionally installed in order to maintain the stored goods at an appropriate humidity.

The present invention is to solve the above problems, it is an object of the present invention to provide a showcase having a plurality of refrigerating compartment that can be stored separately stored products having different storage conditions in one refrigeration system.

In addition, the present invention collects the condensed water generated in the refrigerating chamber without installing a separate moisture supply device in order to maintain the constant humidity in the refrigerating chamber, when the humidity is low, the humidity suitable for the characteristics of the product to be stored by evaporating it appropriately It aims to provide a showcase that can be maintained.

It is another object of the present invention to provide a control method of a showcase as described above.

1 is a schematic control system block diagram of a refrigeration showcase according to the present invention;

2 is a configuration of a refrigeration showcase of the refrigeration showcase according to the present invention

Figure 3 is a flow chart for controlling the refrigeration system of the refrigeration showcase of the present invention

4 is a perspective view of a refrigerated showcase according to the present invention;

5 is a partial cross-sectional view of the refrigerated showcase according to the present invention.

6 is a configuration of a refrigeration system of a conventional general refrigeration showcase

<Description of Symbols for Main Parts of Drawings>

10 Control section 110 Function setting section

120, 130 Temperature sensor 1 and 2 room 140 Humidity sensor

170 Level Sensor 200 Compressor

210 Condenser 230, 240 First and Second Evaporators

150, 260 First and second expansion valves 601, 602 First and second refrigerating compartments

620, 630 exhaust and suction grille 670, 680 upper and lower evaporators

610 display racks 650, 660 upper and lower cooling fans

611 Lighting 740 Drain Hose

800 Housing 640 Bulkhead

Refrigeration showcase of the present invention for achieving the above object, the front of the glass and the product to display the goods displayed on the inside of the refrigerating chamber having a door for entering the goods inside and the temperature of the refrigerating chamber at a low temperature A refrigeration showcase comprising a compressor, a condenser, an expansion valve, and an evaporator for maintaining a constant, comprising: a partition for dividing the refrigerator compartment into a first compartment and a second compartment, and a first temperature sensor for detecting a temperature of the first compartment And a second temperature sensor for detecting the temperature of the second refrigerating compartment, a humidity sensor for detecting the humidity of the refrigerating compartment, and at least one cooling fan for allowing cold air generated from the evaporator to flow into the refrigerating compartment. The evaporator includes a first evaporator for refrigerating the first refrigerator compartment and a second evaporator for refrigerating the second refrigerator compartment connected in parallel. The expansion valve is composed of a first expansion valve and a second expansion valve provided on the upstream side of the refrigerant flow to each evaporator, an on-off valve provided on at least one upstream side of the first or second expansion valve, A defrost heater installed in an expansion valve, a water tank for storing condensed water in the refrigerating chamber, an evaporation heater for heating the water tank, an evaporation fan for transmitting moisture evaporated by the evaporation heater, and the sensors And a controller for receiving the signal and controlling the compressor, the cooling fan, the on / off valve and each heater.

In the refrigerated showcase of the present invention, the partition wall is made of vacuum glass.

In another aspect, the present invention provides a method for controlling the showcase, the method comprising the steps of measuring the temperature (T1, T2) of the first and second refrigerating chamber, and driving the compressor and the cooling fan when the measured temperature is higher than the temperature of the low-temperature refrigerating chamber And opening and closing the valve when the temperature of the low temperature refrigerating compartment is higher than the temperature of the low temperature refrigerating compartment, and opening the on / off valve when the temperature of the high temperature refrigerating compartment is higher than the measurement temperature. If the temperature is lower than or equal to the measured temperature, close the on / off valve and if the measured temperature of the low temperature freezer compartment is lower than the temperature of the low temperature set refrigerator, the value obtained by subtracting a certain temperature value from the low temperature set temperature value is higher than the measured temperature of the low temperature refrigerator compartment. If the compressor, the operation of the cooling fan is stopped, and the temperature of the refrigerating compartment is lower than the temperature of the cold refrigerating compartment. When the temperature is low, measuring the humidity of the refrigerating chamber when the value obtained by subtracting a constant temperature value from the low temperature setting temperature value is higher than the low temperature refrigerating chamber measurement temperature and the evaporation heater when the measured humidity is lower than the set humidity and there is an input of the water level sensor. And driving the evaporation fan and stopping the driving of the evaporation heater and the evaporation fan when the measured humidity is higher than the set humidity or there is no input of the water level sensor.

In addition, the method of controlling the showcase according to the present invention, the driving of the compressor, the cooling fan and the circulating fan may include setting a first timer and setting a second timer when the first timer reaches a set value. Driving the defrost heater and resetting the first timer; and resetting the second timer and stopping driving of the defrost heater when the first timer does not reach the set value.

Hereinafter, a refrigeration showcase of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic control system block diagram of a refrigerated showcase according to the present invention, FIG. 2 is a configuration diagram of a refrigeration showcase according to the present invention, and FIG. 3 is a flow for controlling a refrigeration system of a refrigerated showcase according to the present invention. 4 is a perspective view of a refrigerated showcase according to the present invention.

The refrigeration showcase according to the present invention includes a first refrigerator compartment 601 and a second refrigerator compartment 602 for displaying and storing goods displayed as shown in FIG. 4, and a refrigeration system for maintaining a constant temperature of the refrigerator compartment. It is composed of a housing 800 for storing the inside or supporting the refrigerating chamber.

The refrigerator compartment is divided into a first refrigerator compartment 601 and a second refrigerator compartment 602 by the partition wall 640. The first refrigerating chamber 601 and the second refrigerating chamber 602 may be set to different refrigerating temperatures using the function setting unit 110 shown in FIG. The partition wall is preferably composed of vacuum glass in order to improve insulation between the two refrigerating chambers.

As shown in Figs. 4 and 5, in each refrigerator compartment, temperature sensors 120 and 130 for detecting temperature, humidity sensor 140 for detecting humidity, and evaporator 230 for discharging cold air are provided. It is installed. The humidity sensor may be installed in either the first room or the second room. The evaporator is installed in parallel with the first evaporator 230 installed in the first refrigerator compartment shown in FIG. 2 and the first evaporator 240 installed in the second refrigerator compartment. Each evaporator is installed in series by connecting an upper evaporator 670 installed at an upper portion of each refrigerator compartment and a lower evaporator 680 provided at a lower portion thereof. Each evaporator may be equipped with a defrost heater 290 to remove frost generated in the evaporator.

In addition, a plurality of shelves 610 are installed in each refrigerator compartment to display the product, the front is closed with glass so that consumers can see the product inside, the rear is the seller put the goods inside There is a door to take it out.

In addition, the ejection grill 630 for ejecting cold air from the lower evaporator 680 installed in the housing is formed on the door side of the bottom of the refrigerating chamber, and the suction grill 620 is installed on the glass side of the bottom to suck cold air circulated. It is. A plurality of upper cooling fans 660 and lower cooling fans 650 are installed at the lower part of the spray grill 630 and the rear of the upper evaporator 670 to circulate cold air at an appropriate speed. In addition, in order to increase the display effect of the display products displayed in the refrigerator compartment, a lighting lamp 611 is installed at a suitable position of the refrigerator compartment.

The lower housing 800 of the showcase is provided with a compressor 200, a condenser 210, a condenser cooling fan (not shown), a lower evaporator 680, and a dryer (not shown) for cooling the condenser. The condenser cooling fan is configured to be controlled in conjunction with the operation of the compressor 200. In addition, a water tank 710 for storing the condensed water of the evaporators 230 and 240, and an evaporation heater 720 and an evaporation fan 730 for heating and evaporating the water of the water tank are installed. A drain hose 740 for delivery to the bath is also provided inside the side wall of the refrigerating compartment. And the water level sensor 170 for detecting the water level of the tank is installed inside the tank. The control unit 10 for adjusting the temperature and humidity of the refrigerating chamber according to the signals from the temperature sensors 120 and 130, the humidity sensor 140, and the water level sensor 170 and the driving unit of the apparatus such as a compressor or a fan are also provided in the housing ( 800 is installed inside.

As shown in FIG. 2, the refrigeration system for freezing the showcase includes a compressor 200 for compressing the refrigerant, a condenser 210 for condensing the compressed refrigerant, and expanding the condensed refrigerant before sending it to the evaporator. It is composed of expansion valves 250 and 260 and evaporators 230 and 240. The evaporator of the refrigerating showcase of the present invention is parallel to the first evaporator 230 and the second evaporator 240 disposed in each refrigerating compartment to freeze the first refrigerating compartment 601 and the second refrigerating compartment 602 at different temperatures. Is connected to the condenser. Correspondingly, two expansion valves 250 and two expansion valves 260 are provided on the upstream side of the refrigerant flow direction of each evaporator. In addition, a defrost heater for removing frost generated in each evaporator is additionally installed in the evaporator.

1 to 3, the operation and control method of the showcase of the present invention will be described.

As shown in FIG. 1, the control unit 10 includes a function setting unit 110 for setting the temperature and humidity of each refrigerator compartment, temperature sensors 120 and 130 installed in each refrigerator compartment, and a humidity sensor 140. And receiving the signal from the water level sensor 170, by the flow chart shown in Figure 3 compressor drive unit 20, cooling fan and evaporation fan drive unit (30, 40) and on-off valve drive unit 50, defrost and The temperature and humidity of the showcase are controlled by controlling the evaporation heater driving units 70 and 80.

The function setting unit 110 may set the temperature and humidity according to the stored product, in particular, when the stored product is a butter cake, the temperature is preferably 10 to 12 degrees Celsius, the humidity is 50 to 60%, In the case of fresh cream cakes, the temperature is preferably set to 3 to 5 degrees Celsius and humidity to 80% or more. In addition, it is preferable to keep the cold air velocity in the refrigerating chamber to be less than 0.3 m / s, and the humidity deviation of the upper end and the lower end of the refrigerating compartment is preferably maintained at less than 5%. Such conditions can be satisfied by appropriately adjusting the position of the sensor and the speed of the cooling fan.

When the temperature and humidity are set as described above, the control unit controls each device according to the process of the flowchart shown in FIG. 3.

When the first refrigerator compartment 601 is at a low temperature and the second refrigerator compartment 602 is set at a high temperature, first, the temperatures T1 and T2 of the first refrigerator compartment and the second refrigerator compartment are measured (310), and the set temperature of the first refrigerator compartment ( If the measured temperature (T1) is higher than the ST1) (320) by outputting a drive signal to the compressor driving unit 20 and the cooling fan driving unit (30, 40) to operate the refrigeration cycle (330). At this time, when the set temperature ST2 of the second refrigerating chamber set at a high temperature is higher than the second refrigerating chamber measurement temperature T2 (420), the opening / closing valve 270 is opened to freeze both the first refrigerating chamber and the second refrigerating chamber.

If the first refrigerator compartment measurement temperature T1 is higher than the set temperature ST1 of the first refrigerator compartment and the set temperature ST2 of the second refrigerator compartment is lower than or equal to the measured temperature T2 (420), the opening and closing valve driver 50 By outputting the valve closing signal to the) to close the on-off valve 270 to freeze only the first refrigerator compartment (430).

When the first refrigerating chamber measurement temperature is lower than a value obtained by subtracting a constant temperature ΔT from the set temperature of the first refrigerating chamber, the refrigeration is stopped by stopping the driving of the compressor and the cooling fan (450). When controlling the refrigeration showcase of the present invention by setting the value of ΔT too small in the flow chart shown in Fig. 3, the compressor may run and stop too often, causing the device to be unreasonable. In this case, therefore, it is desirable to protect the compressor by increasing the value of DELTA T sufficiently. In other words, if the temperature for operating the compressor is T, it is preferable that the temperature at which the compressor is stopped is T + ΔT so that the temperature deviation of the low-temperature refrigerator compartment is not too small.

Control to control humidity while refrigeration is stopped. That is, when the measured temperature of the first refrigerating compartment is lower than the set temperature of the first refrigerating compartment, the humidity of the refrigerating compartment is measured (460). When the measured humidity is lower than the set humidity and there is an input of the water level sensor indicating that there is water in the water tank 710. The evaporation heater and the evaporation fan are driven to supply water to the refrigerating compartment (490). In particular, in this case, the size of the moisture supply pipe may be adjusted so as to supply a large amount of moisture to the refrigerating chamber to which the humidity should be high, or the supply of moisture to a specific refrigerating chamber may be blocked. If the measured humidity is higher than the set humidity or there is an input of the water level sensor that there is no water in the water tank 710, the supply of water is cut off by stopping the driving of the evaporation heater and the evaporation fan.

If the defrost heater 290 for defrosting is installed in the upper evaporator 670, a control method is added to perform a step (340 to 410) of operating the defrost heater for a predetermined time only when the refrigerating chamber is frozen. can do. That is, the first timer is set for time setting in order to operate the defrost heater at regular time intervals while the compressor is running. When the first timer setting time for operating the defrost heater is reached, the second timer for setting the time for defrosting by driving the defrost heater is set, and the defrost heater is driven only for the time interval set in the second timer. Reset the first timer. When the first timer does not reach the set value, the second timer is reset and the drive of the defrost heater is stopped to stop the humidification.

According to the present invention, it is possible to store a product having different storage conditions in one showcase by providing a showcase having two refrigerating chambers for storing products having different storage temperatures in one refrigeration system.

In addition, according to the present invention without installing a separate moisture supply device to maintain the humidity in the refrigerating chamber, and collects the condensed water generated in the refrigerating chamber and when the humidity is lowered to evaporate it to keep the humidity suitable for the characteristics of the product stored It will provide a showcase that can be properly maintained.

In addition, the present invention provides a control method capable of controlling a showcase having the above effects.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical spirit of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

Claims (4)

In the front part there is a refrigeration chamber equipped with a glass to view the goods displayed on the inside and the rear part a door for entering the goods inside, a compressor, a condenser, an expansion valve, to keep the temperature of the fridge constant at a low temperature, And in the refrigeration showcase comprising an evaporator, A partition wall which divides the refrigerator compartment into a first chamber and a second chamber, A first temperature sensor for detecting a temperature of the first chamber, A second temperature sensor for detecting a temperature of the second chamber, Humidity sensor for detecting the humidity of the refrigerator compartment, The evaporator is composed of a first evaporator for refrigerating the first chamber connected in parallel and a second evaporator for refrigerating a second chamber, The expansion valve is composed of a first expansion valve and a second expansion valve installed on the upstream side of the refrigerant flow to each evaporator, At least one cooling fan for allowing the cold air generated from the evaporator to flow into the refrigerating chamber, An on / off valve provided on an upstream side of at least one of the first or second expansion valves; Defrost heater installed in the expansion valve, A water tank for storing the condensed water in the refrigerating chamber, An evaporator heater for heating the tank; An evaporation fan for transmitting the water evaporated by the evaporation heater to the refrigerating chamber, And a control unit for receiving the signals of the sensors and controlling the compressor, the cooling fan, the opening / closing valve, and the respective heaters. The method of claim 1, The partition wall is a refrigerated showcase, characterized in that the glass. A method for controlling the showcase according to any one of claims 1 and 2, Measuring the temperatures (T1, T2) of the first refrigerator compartment and the second refrigerator compartment, Driving the compressor and the cooling fan when the measured temperature is higher than the temperature of the cold storage room; Opening and closing the valve when the temperature of the low temperature refrigerating compartment is higher than the temperature of the low temperature refrigerating compartment and the temperature of the high temperature refrigerating compartment is higher than the measurement temperature; Closing the shut-off valve when the measured temperature is higher than the temperature of the low temperature set refrigerator and the temperature of the high temperature set refrigerator is lower than or equal to the measured temperature; Stopping the operation of the compressor and the cooling fan when the measured temperature of the low temperature freezer compartment is lower than the temperature of the low temperature set refrigerator compartment, when a value obtained by subtracting a constant temperature value from the low temperature set temperature value is higher than the measured temperature of the low temperature refrigerator compartment; Measuring the humidity of the refrigerating compartment when the measured temperature of the low temperature refrigerating compartment is lower than the temperature of the low temperature refrigerating compartment, when the value obtained by subtracting a constant temperature value from the low temperature setting temperature value is higher than the low temperature refrigerating compartment measurement temperature; Driving the evaporator heater and the evaporator fan when the measured humidity is lower than the set humidity and there is an input of the water level sensor; And stopping the driving of the evaporation heater and the evaporation fan when the measured humidity is higher than the set humidity or there is no input of the water level sensor. The method of claim 3, The driving of the compressor, the cooling fan, and the circulation fan may include setting a first timer; Setting a second timer, driving a defrost heater, and resetting the first timer when the first timer reaches a set value; Resetting the second timer and stopping driving of the defrost heater when the first timer does not reach the set value.