JP2005073941A - Heating cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cabinet wherein the actual temperature of article is matched with a set temperature as much as possible. <P>SOLUTION: The heating cabinet comprises: display shelves 2 on which a large number of commodities 5 are placed; heating wires 6 for heating the display shelves 2; temperature sensors 7 arranged at the shelves 2; a setting switch 13 for setting the heating temperature of the commodities 5 on the shelves 2; and a control part 11 for controlling the heating wires 6. At the center 8 of the shelf 2, the heating wire 6 is arranged with lower arranging density than that at the peripheral part of the shelf 2 for heating the respective commodities 5 on the shelf 2 to an equal temperature. The temperature sensor 7 is arranged at the center 8 of the shelf 2 to detect the temperature at the center 8 of the shelf 2. The control part 11 controls the heating wires 6 so that the detected temperature by the sensor 7 may become a temperature higher than the set temperature set by the setting switch by a prescribed temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a warm storage such as a warm storage open showcase that stores products such as can drinks placed on display shelves in a heated state.

  Patent Document 1 discloses a device in which a heater is provided on a display shelf to heat products on the display shelf. Further, in Patent Document 1, two thermistors are provided on the front and rear sides of the display shelf, and the temperature of the display shelf heater in a normal heat-retaining state is controlled to be a set temperature.

JP 2002-248034 A (paragraph number 0015-0017 / 0028, FIG. 1-2)

  Since the actual product temperature becomes lower than the temperature of the display shelf itself due to heat radiation or the like, the product tends to be kept at a temperature lower than a desired set temperature. For this reason, raw warm goods are sold, and the creditworthiness with respect to goods falls.

  Therefore, an object of the present invention is to provide a warm storage room in which the actual product temperature matches the set temperature as much as possible.

  As shown in FIGS. 1 and 2, the warm storage of the present invention includes a display shelf 2 on which a large number of products 5 are placed, a heating wire 6 for heating the display shelf 2, and a temperature disposed on the display shelf 2. It includes a sensor 7, a setting unit 13 that sets the heating temperature of the commodity 5 on the display shelf 2, and a control unit 11 that controls the heating wire 6. In order to heat each product 5 on the display shelf 2 to a substantially uniform temperature, the heating wire 6 is arranged at a lower density than the peripheral portion of the display shelf 2 in the central portion 8 of the display shelf 2 as shown in FIG. It is arranged to be. The temperature sensor 7 detects the temperature of the central portion 8 of the display shelf 2. The control unit 11 controls the heating wire 6 so that the temperature detected by the temperature sensor 7 is higher than the temperature set by the setting unit 13 by a predetermined temperature.

  The warm storage here includes a product that can switch between warm storage and cold storage of the product 5. The predetermined temperature corresponds to the temperature difference between the temperature detected by the temperature sensor 7 and the actual temperature of the product 5, and this temperature difference is usually 4 to 6 ° C., but is experimentally determined according to the outside air temperature condition and the like. . The number of products 5 that can be placed on the display shelf 2 can be arbitrarily selected.

  In order to provide the display shelves 2 on which a large number of products 5 are placed in upper and lower multi-stages, the heating wires 6 arranged in each selected display shelf 2 and the temperature sensors 7 arranged in each selected display shelf 2; The setting part 13 which sets the heating temperature of the goods 5 of each display shelf 2 respectively, and the control part 11 which controls each heating wire 6 are included. In the central part 8 of each display shelf 2, the heating wires 6 are arranged so as to be less dense than the peripheral edge of the display shelf 2, and the temperature sensor 7 of each display shelf 2 is connected to each display shelf 2. It arrange | positions at the center part 8, and the temperature in this center part 8 is detected. The control unit 11 sets the heating wire 6 of each display shelf 2 so that the detected temperature of the temperature sensor 7 of each display shelf 2 is higher than the set temperature of each display shelf 2 by the setting unit 13 by a predetermined temperature. Each is controlled.

  The storage warehouse here is one that puts all the display shelves 2 in a refrigerated state, one that puts each selected display shelf 2 in a refrigerated state, and puts the other display shelves 2 in a refrigerated state, This includes switching between warm storage and cold storage. The display shelf 2 includes a case where a plurality of rows are provided in the left-right direction. The number of upper and lower stages of the display shelf 2 can be arbitrarily selected.

  In order to display the current temperature of the product 5 on the display shelf 2, a display unit 12 is provided on the outer surface of the storage cabinet main body to display a temperature lower by a predetermined temperature than the temperature detected by the temperature sensor 7. ing. When the display shelves 2 are provided in multiple upper and lower stages, the display unit 12 can switch the current temperatures of the products 5 in each display shelf 2 at predetermined time intervals and display them in order.

  According to the present invention, since the heating wire 6 is controlled so that the temperature detected by the temperature sensor 7 is higher than the temperature set by the setting unit 13 by a predetermined temperature, the temperature is excessively lower than the desired temperature setting. It is possible to reliably prevent the raw lukewarm product 5 from being sold. The manager of the warm warehouse simply sets the heating temperature of the desired product 5, and the product 5 is heated to a temperature substantially matching the set temperature, so the reliability of the warm warehouse is improved.

  Moreover, since each product 5 on the display shelf 2 is heated to a substantially uniform temperature, the temperature of all the products 5 on the display shelf 2 can be obtained by providing only one temperature sensor 7 at the central portion 8 of the display shelf 2. Can be grasped. Therefore, the number of temperature sensors 7 can be minimized, and the cost of the hot storage can be reduced. This is particularly advantageous when the display shelves 2 are provided in multiple stages.

  When the display unit 12 displays a temperature that is lower than the temperature detected by the temperature sensor 7 by a predetermined temperature, the display unit 12 displays a temperature that matches the current temperature of the product 5, and the reliability of the storage cabinet Will improve. In addition, since the temperature sensor 7 for controlling the heating wire 6 also serves as the sensor for displaying the temperature, the cost of the storage can be reduced also in this respect.

  FIG. 2 shows a storage cabinet that is the subject of the present invention. The display chamber 1 has an open front surface, upper and lower multi-level display shelves 2 arranged inside the display chamber 1, the front end of each display shelf 2, and the like. The lighting device 3 arranged on the ceiling surface of the display room 1 and the like, the display panel 4 arranged on the upper surface of the display room 1 on the outer surface of the main body of the storage cabinet, and the like are included.

  Each display shelf 2 is horizontally long, and products 5 such as can beverages such as canned coffee and plastic bottle drinks are placed on the display shelves in a plurality of rows on the left and right sides. As shown in FIG. 1, heating lines 6 and temperature sensors 7 are arranged on the back side of each display shelf 2. The heating wire 6 stores the product 5 on the upper surface of the heating wire 6 in a heated state via the display shelf 2. Each display shelf 2 is formed of an aluminum metal plate having heat conductivity.

  The heating lines 6 are arranged symmetrically over the entire display shelf 2 while being folded back, and exist so that the arrangement density at the central portion 8 of the display shelf 2 is sparser than the peripheral edge of the display shelf 2.

  That is, since the central portion 8 of the display shelf 2 is also heated by heat transfer from the heating wires 6 arranged in the peripheral portion of the display shelf 2, the arrangement density of the heating wires 6 is set to be higher than that of the peripheral portion of the display shelf 2. It is sparse so that it is not overheated. Thereby, each product 5 on the display shelf 2 is heated substantially uniformly.

  Since the front end portion 9 of the display shelf 2 is easy to cool because the front surface of the display chamber 1 is open, and it is necessary to raise the temperature at an early stage in order to be taken out from the product 5 on the front side, The density of the arrangement is set so as to be further dense.

  The temperature sensor 7 is disposed in the central portion 8 of the display shelf 2 to detect the temperature of the central portion 8 and outputs the detected temperature to the control portion 11. The control part 11 is arrange | positioned in the lower part in a warm storage main body. As shown in FIG. 3, the display panel 4 includes a display unit 12 that displays the current temperature of the product 5 displayed on each display shelf 2, and a setting switch (setting unit) 13 that sets the heating temperature of the product 5. The lighting switch 14 is connected to the control unit 11. The setting switch 13 can set the heating temperature of the product 5 for each display shelf 2. When setting the heating temperature, the set temperature is displayed on the display unit 12.

  The control unit 11 controls the heating wire 6 of each display shelf 2 based on the heating temperature of the product 5 set on the display panel 4 and the temperature detected by the temperature sensor 7 of each display shelf 2, and each display shelf 2 The current temperature of the product 5 in each display shelf 2 is displayed on the display panel 4 every moment based on the temperature detected by the temperature sensor 7. The controller 11 controls the heating wires 6 of each display shelf 2 independently.

  The heating lines 6 and the display on the display panel 4 are controlled as follows. When the set temperature of the product 5 of each display shelf 2 is set to 55 ° C., for example, by the setting switch 13 of the display panel 4, the control unit 11 determines that the temperature detected by the temperature sensor 7 is 5 ° C. higher than the set temperature. The heating wire 6 is controlled so that the temperature is increased to 60 ° C.

  The reason why the temperature of the display shelf 2 is set higher than the set temperature is that the actual temperature of the product 5 becomes lower than the temperature of the display shelf 2 due to thermal conductivity, heat dissipation, and the like, so that this temperature decrease is compensated. . The predetermined temperature (5 ° C.) corresponds to the temperature difference between the temperature detected by the temperature sensor 7 and the current temperature of the product 5, and this temperature difference was obtained based on experiments and the like.

  The controller 11 displays a temperature lower than the current detected temperature of the temperature sensor 7 by a predetermined temperature of 5 ° C. on the display unit 12 of the display panel 4 during normal storage. At this time, the control unit 11 switches the product temperatures of the display shelves 2 every predetermined time and sequentially displays them on the display unit 12. The temperature display is switched every 5 seconds, for example.

  The temperature of the product 5 on the display shelf 2 was measured by the warm storage of the present invention. As shown in FIG. 4, the measurement is performed in the horizontal center (point A) of the rear end 10 of the display shelf 2, the right end (point B) of the rear end 10, the center left end (point C) in the front-rear direction, front and rear Center in the left-right direction (D point), right end in the center in the front-rear direction (point E), left end of the front end 9 (point F), center in the left-right direction of the front end 9 (point G), right end of the front end 9 (H This was done with the product 5 placed at each point.

  The set temperature of Product 5 was 55 ° C. Product 5 used canned coffee. The outside temperature at the time of measurement was 25.5 ° C. Table 1 shows the measurement results.

  The measurement temperature at each measurement point of A to H of the product 5 is in the range of 48.7 to 58.1 ° C., and is within the allowable temperature range (+ −10 ° C.) with respect to the set temperature (55 ° C.). . The average value of the measurement temperatures at the measurement points A to H was 53.3 ° C.

  In the above description, the temperature of the display shelf 2 is controlled to be higher than the set temperature of the product 5 by a predetermined temperature of 5 ° C., but the predetermined temperature may be changed according to the outside air temperature. For example, when the outside air temperature is lower than 20 ° C., the predetermined temperature is changed to 6 ° C., and when the outside air temperature is higher than 30 ° C., the predetermined temperature is changed to 4 ° C. The predetermined temperature may be fixed at the 5 ° C.

  You may comprise the display part 12 of the display panel 4 so that the product temperature of each display shelf 2 can be displayed simultaneously. The arrangement pattern of the heating wires 6 is not limited to the example of FIG. 1 and can be arbitrarily set as long as each product 5 on the display shelf 2 can be heated substantially uniformly.

Bottom view of display shelf of warm storage according to the present invention Schematic side view of warm storage Block diagram of the control system of the hot storage Top view of a display shelf showing the location of product temperature measurement

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display room 2 Display shelf 4 Display panel 5 Goods 6 Heating wire 7 Temperature sensor 8 Display shelf center part 9 Display shelf front end part 11 Control part 12 Display part 13 Setting switch

Claims (3)

A display shelf 2 on which a large number of products 5 are placed, a heating wire 6 for heating the display shelf 2, a temperature sensor 7 arranged on the display shelf 2, and a setting for setting the heating temperature of the products 5 on the display shelf 2 Part 13 and a control part 11 for controlling the heating wire 6,
In the central part 8 of the display shelf 2, the heating wires 6 are arranged so that the arrangement density is sparser than the peripheral part of the display shelf 2,
The temperature sensor 7 detects the temperature of the central portion 8 of the display shelf 2,
A heating cabinet characterized in that the controller 11 controls the heating wire 6 so that the temperature detected by the temperature sensor 7 is higher than the temperature set by the setting unit 13 by a predetermined temperature. A multi-stage display shelf 2 on which a large number of products 5 are placed, a heating wire 6 arranged in each selected display shelf 2, a temperature sensor 7 arranged in each selected display shelf 2, and each display Including a setting unit 13 for setting the heating temperature of the product 5 on the shelf 2 and a control unit 11 for controlling each heating wire 6;
In the central part 8 of each display shelf 2, the heating wires 6 are arranged so that the arrangement density is less sparse than the peripheral part of the display shelf 2,
The temperature sensor 7 of each display shelf 2 is arranged at the central portion 8 of each display shelf 2 and detects the temperature at the central portion 8.
The control unit 11 sets the heating wire 6 of each display shelf 2 so that the temperature detected by the temperature sensor 7 of each display shelf 2 is higher than the set temperature of each display shelf 2 by the setting unit 13 by a predetermined temperature. A warm storage that is controlled individually.   In order to display the current temperature of the product 5 on the display shelf 2, a display unit 12 is provided on the outer surface of the storage cabinet main body to display a temperature lower by a predetermined temperature than the temperature detected by the temperature sensor 7. The warm storage warehouse of Claim 1 or 2.

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