JP3726729B2 - Operation controller for freezer and refrigerated showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation controller for a show case having excellent handling property wherein the flexibility of installation upon assembling a show case in a canopy section is improved, and further inputting and alteration of varieties of set values of operation control are treated with ease from the front of the show case. SOLUTION: An apparatus is separated to an operation controller body, and an operation/display section equipped with an input set unit and a data display on a front panel section, and both are connected with each other through a signal cable. The controller body is contained in a canopy section provided at a front upper portion of a case body, and the operation/display section is fitted to a front decorative plate of the canopy section and the front surface of the operation/display section is covered with an opening/closing cover which is transparent through an opposite surface to a display.

Description

[0001]
[Industrial application fields]
The present invention relates to a configuration of an operation controller provided in a freezer / refrigeration showcase and a mounting structure thereof.
[0002]
[Prior art]
The refrigerated showcase is equipped with an operation controller that takes in signals from the internal temperature sensor, defrost temperature sensor, outside air temperature sensor, etc., and performs internal temperature adjustment and defrost control. In recent showcases, electronic controllers are generally employed as operation controllers. This electronic controller has a microcomputer control unit as its core, an operation unit for inputting set values such as the temperature sensor, the internal temperature, the defrosting time, the defrosting end temperature, etc., and its input data, the cold storage A liquid crystal display type display unit that digitally displays the internal temperature is combined. In the conventional configuration, the components except for the temperature sensor are all assembled into a controller. And this operation controller is stored in a canopy-like lighting fixture mounting part called a canopy part provided in the upper front part of the showcase, and the operation part and display part are in a see-through window opened in the front decorative plate of the canopy part. It is installed to face.
[0003]
[Problems to be solved by the invention]
By the way, the shape and size of the canopy portion differ depending on the type of the freezer / refrigerated showcase. For this reason, in the integrated operation controller as described above, when the controller is stored in the canopy unit, the controller may not be installed at a desired position due to space restrictions depending on the model of the showcase.
[0004]
In addition, the setting switches are installed on the front operation panel of the controller so that the user can change the input values of the internal temperature, defrost temperature, high temperature alarm, low temperature alarm, etc. at any time after the installation of the showcase. The differential setting (ON-OFF width) of the thermostat when the operation of the refrigerator is controlled by thermo-operation control is a dip switch provided on the side of the controller case, separately from the setting switch of the operation unit. Usually, it is set to the standard setting value and shipped from the factory. For this reason, if it is necessary to change the differential setting value of the thermostat after the showcase is installed locally, the decorative panel of the canopy part covering the controller is removed, and the dip switch built into the controller body Currently, this is dealt with by operating.
[0005]
The present invention has been considered in view of the above points, and its object is to solve the above-mentioned problems, increase the degree of freedom of installation when incorporated in a canopy part of a showcase, and also to input and change various set values for operation control. An object of the present invention is to provide an operation controller for a freezer / refrigerated showcase with excellent serviceability that can be easily performed from the front of the showcase.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the operation controller according to the present invention is separated into a controller main body and an operation / display unit having an input setting device and a data display display on the front panel unit, and a signal cable is used between them. In addition to connecting, the controller body is housed in the canopy part provided in the upper front of the case body, and the operation / display part is fitted into the front decorative plate of the canopy part and is operated on the front of the operation / display part. The display unit is provided with an opening / closing lid that allows the surface facing the display unit to be a transparent surface and the surface facing the operation unit to be a non-transparent surface, and allows the display contents of the display unit to be viewed from the front in a closed state .
[0007]
[Action]
According to the above configuration, even if it is difficult to install the controller main unit and the operation / display unit together in the same place due to the installation space limitation in the canopy unit, the controller main unit and the operation / display unit are separated. The controller body can be assembled separately from the operation / display unit by attaching an open / close lid to the front of the operation / display unit. In the normal operating state of the showcase, the internal temperature displayed on the display unit can be read from the front of the showcase through the transparent surface of the cover, while the switches on the operation unit are It is hidden behind the screen and cannot be seen from the outside, and it cannot be touched directly, preventing mischief operations.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. First, in FIG. 1A, 1 is a case main body of a multistage open showcase, 2 is a product display shelf in a warehouse, 3 is a cooler (evaporator for a refrigerator) installed in a cold air circulation duct 4, 3a Is a defrosting heater of the cooler 3, 5 is a cool air blower fan, 6 is a canopy portion provided on the upper front of the case body 1, 7 is an illumination lamp attached to the lower surface side of the canopy portion, and 8 is incorporated in the canopy portion 6. It is an installed operation controller. Here, as shown in FIG. 1B, the operation controller 8 includes a controller main body 9 incorporating a microcomputer control unit, an operation / display unit 10 separated from the controller main body 9 and an independent temperature sensor (thermistor) 11. The operation / display unit 10 is connected to the terminal 9a of the controller body 9 via a signal cable 12 and a cable connector (connector with a locking claw) 12a, and the temperature sensor 11 has a lead wire 11a via a connector 11b. It is connected to the input terminal 9b of the controller body. Reference numeral 9 c denotes a thermostat differential setting dip switch incorporated in the controller main body 9, which is provided on the side of the controller main body 9.
[0009]
Further, as the temperature sensor 11, the temperature sensor (thermistor) of the internal temperature sensor 11A, the temperature adjustment temperature sensor 11B, the defrost temperature sensor 11C, and the outside air temperature sensor 11D is provided at each position as shown in FIG. And is connected to the controller main body 9. In this case, as measures to prevent wiring mistakes of each temperature sensor and simplify wiring work, the temperature sensor lead wires (covered wires) are color-coded and then connected to the input terminals of the same color. .
[0010]
Then, the controller main body 9 is stored in the canopy unit 6, and the operation / display unit 10 is attached to the front window 6a of the canopy unit 6 as shown in FIGS. 2 (a) and 2 (b). And is fixed to the window frame via locking claws 10a provided at both left and right ends. In this case, as shown in FIG. 2B, the controller main body 9 is positioned and arranged at a position where the above-mentioned dip switch 9c provided on the side of the main body faces the mounting window 6b.
[0011]
Returning to FIG. 1B, on the front panel of the operation / display unit 10, an input setter 13, a liquid crystal display 14 for digitally displaying various data such as the internal temperature and set value, a defrost lamp, etc. 15 (lights up at the time of defrosting) etc., and the arrangement is shown in FIG. The input setting unit 13 includes a control item changeover switch 13a, a control item indicator lamp 13b, a feed switch 13c for changing the set value of each control item, and a return switch 13d.
[0012]
Further, the operation / display unit 10 includes an opening / closing lid 16 so as to cover the front surface thereof. As shown in FIG. 3B, the opening / closing lid 16 has the front surface of the display 14 and the defrosting lamp 15 as a transparent surface 16a and the remaining surface area as an opaque surface 16b, and the opening / closing lid 16 is closed. Thus, the display content of the display 14 and the lighting state of the defrost lamp can be visually observed from the front of the showcase. In addition, if a list showing the temperature setting value of the cabinet for each application such as vegetables, meat, fish and frozen food is pasted on the back of the opening / closing lid 16, the setting value can be changed with reference to this list. Easy to do and convenient.
[0013]
With such a configuration, the opening / closing lid 16 of the operation / display unit 10 is closed during normal operation of the showcase, and in this state, the internal temperature displayed on the display 14 through the transparent surface 16a of the opening / closing lid 16 is set to the front of the showcase. Can be confirmed visually. On the other hand, when changing the internal temperature setting value or the like according to the season or the like, the input setting device 13 is operated from the front with the opening / closing lid 16 open, and the setting value of the necessary control item is changed. When the differential of the temperature sensor 11 needs to be changed, the operation / display unit 10 is moved forward from the front decorative plate 6a of the canopy unit 6 as shown in FIG. And the dip switch 9c of the controller body 9 can be operated by inserting a fingertip into the mounting window 6b of the front decorative board 6a.
[0014]
FIG. 4 is an input / output configuration diagram showing functions of the operation controller.
[0015]
【The invention's effect】
As described above, according to the configuration of the present invention, the following effects can be obtained in terms of incorporating the operation controller into the showcase and adjusting the operation performed at the location of the showcase.
The controller for operation is separated into the controller main unit and the operation / display unit equipped with an input setter and data display on the front, and they are interconnected with a signal cable, and the controller main unit is provided on the upper front of the case main unit. The operation / display unit is fitted into the front decorative plate of the canopy unit, and the surface facing the display unit of the operation / display unit is transparent on the front surface of the operation / display unit. Since the surface facing the operation unit is a non-transparent surface, and an open / close lid is attached to allow the display contents of the display unit to be viewed from the front in the closed state, various shows are not subject to restrictions on the installation space. The case can be easily incorporated into its canopy, and various control items can be easily adjusted at the location of the showcase. While fluoroscopic display contents of the display during normal operation of Yokesu can prevent mischief operation of the input setting unit simultaneously.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an embodiment of the present invention, (a) is a layout diagram of an operation controller incorporated in a showcase, and (b) is a configuration perspective view of the operation controller. -It is a figure showing the assembly structure to the canopy part of a display part, (a) is an attachment state figure, (b) is a removal state figure,
3 is a front view of an operation / display unit of the controller in FIG. 1. (a) is a state of opening of the opening / closing lid, and (b) is a state of closing of the opening / closing lid. [FIG. I / O configuration diagram showing functions [Explanation of symbols]
1 Showcase body 6 Canopy section 6a Front decorative panel 6b Mounting window 8 Controller 9 for operation Controller body 9a, 9b Terminal 9c Dip switch (for differential adjustment of temperature sensor)
DESCRIPTION OF SYMBOLS 10 Operation / display part 10a Locking claw 11 Temperature sensor 12 Signal cable 13 Input setting device 14 Display 15 Defrost lamp 16 Opening / closing lid 16a Perspective surface 16b Opaque surface

Claims (1)

Operation controller that controls the temperature and defrosting control of the refrigerator / freezer showcase, and separates the controller into a controller body and an operation / display unit with an input setter and data display on the front panel. In addition to interconnecting the two with a signal cable, storing the controller body inside the canopy part provided in the upper front of the case body, and installing the operation / display part by fitting it in the front decorative plate of the canopy part The operation / display unit has a transparent surface facing the display unit and a non-transparent surface facing the operation unit, and the display content of the display unit is viewed from the front in the closed state. A controller for the operation of a freezer / refrigerated showcase, which is equipped with an openable lid .

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