JPH0440626B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerated/warm storage switching type show case equipped with a heating device.

Structure of the conventional example and its problems FIGS. 1 to 4 show a conventional refrigerated/heated storage switchable case. The configuration of this conventional example will be explained below with reference to FIGS. 1 to 4.

In the figure, 1 indicates a storage chamber 2, a cooling chamber 3, and
This is the main body of a refrigerated/warm storage switching type show case that forms a machine room 4. The storage room 2 has a transparent door 5 that opens and closes an opening 5' formed in the front, transparent left and right side walls 6, 6', a back wall 7, a top wall 8, and a bottom plate 9.
and four supports 10a, 10b, 10c, 10
It is composed of d. The side walls 6, 6', the back wall 7, the top wall 8, and the bottom plate 9 are the supports 10a, 1
0b, 10c, and 10d to form a storage chamber 2. The cooling chamber 3 is located below the bottom plate 9, and is thermally separated from the machine room 4 by a container-shaped bottom wall 11 made of a heat insulating material. In the cooling chamber 3, the evaporator 16 of the cooling system consisting of a compressor 12, a condenser 13, a dryer 14, a chiapillary tube 15, and an evaporator 16 is installed, and cool air is supplied to the storage chamber 2. A fan motor 17 for forced circulation is installed on the leeward side of the evaporator 16.

The bottom plate 9 is provided with a discharge port 18 and a suction port 19, and the discharge port 18 and the suction port 19 are opened along the side walls 6, 6' of the door 5 that do not face each other. Further, the fan motor 17 is connected to the discharge port 1
8 and parallel to the discharge port 18.

The machine room 4 is located below the main body 1, and contains a compressor 12 and a condenser 1 of the cooling system.
3, a dryer 14 and a capillary tube 15 are installed. In order to improve heat dissipation in the machine room 4, a condenser fan motor 20 is installed in the machine room 4.
is installed. The outer circumferences of the cooling chamber 3 and the machine chamber 4 are covered with a grille 21 having slits 21'. Reference numeral 22 denotes a drain pan, which guides drain water adhering to the evaporator 16 to the drain pan 22 via a drain hole 23 and a drain tube 24. Further, casters 25 are provided at the bottom of the machine room 4,
It is made to be transportable.

In addition, a partition wall 26 is provided in the center of the storage room 2.
The storage room 2 is divided into a refrigeration-only room 2a and a refrigeration/hot storage switching room 2b. The partition wall 26 includes two upper and lower metal plates 28 sandwiching a heat insulating material 27.
The main body 30 of the partition wall 26 consists of a main body 30 of the partition wall 29, and a suction duct 31 and a discharge duct 32 provided on both sides thereof. The suction duct 31 is located on an extension of the discharge port, and the discharge duct 32 is located on an extension of the suction port 19. A heater 33 is attached to the inner surface of the metal plate 28 at the top of the main body 30 using aluminum foil or the like, and a Z-shaped plastic plate 34 connects the metal plates 28, 29 and the heat insulating material 27 to the side surface of the main body 30.
is fixed. The suction duct 31 is connected to the main body 30
The part located on the side of the main body 30 and in contact with the main body 30 is made of Z-shaped plastic material 30a similar to the plastic plate 34 on the side surface of the main body 30, and has openings 35 on the upper and lower sides.
It has a rectangular cylindrical shape with a and 35b. The lower opening 35b has an opening 35b.
It has a shutter 37 that is installed over the entire area so as to be openable and closable with a shaft 36 as the center point. Further, an opening 35b is provided at the lower part of the outer peripheral side of the suction duct 31.
A cut and raised portion 31a is provided in the horizontal inward direction over the entire area. Further, the discharge duct 32 is connected to the suction duct 31.
Since the shutter 37, the upper and lower openings 35a and 35b, and the shaft 36 have the same configuration, a detailed explanation thereof will be omitted, and the same parts will be explained by adding dots to the drawing numbers. The suction duct 31 and the discharge duct 32 are connected to the support 10.
a, 10b, 10c, 10d, and the main body 3
0 is received by a Z-shaped plastic plate 30'.

Then, a gasket 38 is installed around the partition wall 26.
are provided and brought into contact with the side walls 6, 6', the door 5, and the back wall 7 to thermally seal the refrigerating chamber 2a and the refrigerating/warming switching chamber 2b.

Next, the operation of the refrigerated/heated storage switching type case will be described when the refrigerating operation is performed.

A thermostat (not shown) having a heat-sensitive part fixed in thermal contact with the evaporator 16 activates the compressor 12 of the cooling system to compress and circulate the refrigerant enclosed within the cooling system. Then, it is condensed in a condenser 13, passed through a dryer 14, reduced in pressure in a capillary tube 15, and evaporated in an evaporator 16, thereby cooling the evaporator 16. The cooling fan motor 17 sends the cold air to the lower part of the storage chamber 2 through the discharge port 18 .

At this time, the shutter 37 of the suction duct 31 and the shutter 37' of the discharge duct 32 are set in a state where they are pushed upward by a handle (not shown). For this reason, the opening 35 of the suction duct 31
a and the opening 35a' of the discharge duct portion 32 are opened.

In addition, since the suction duct 31 opens in the same direction as the cold air discharge port 18, the cold air rises along the side wall 6' and hits the partition wall 26, and some of the cold air reaches the main body 30 of the partition wall 26. It flows along the lower surface, and part of it passes through the opening 35a and enters the refrigerating/warming switching chamber 2a.
flow inside. The cold air passes through the opening 35a' of the discharge duct 32 and is sucked into the suction port 19 after cooling the products in the refrigerating/warming switching chamber 2a.

Next, a case will be described in which the refrigerating/warming switching chamber 2a is set to hot storage. Each shutter 37, 37' is connected to each opening 35b, 3 by a handle (not shown).
5b' is lowered and fixed until it hits the cut and raised portions 31a, 31a' (indicated by dotted lines in Figure 4). Also,
The heater 33 is energized by switching a refrigerating/warming switch (not shown) to the warming side.
Since the heater 33 is attached to the metal plate 28, the metal plate 28 is heated by being energized.

For this reason, the product in the refrigerated/warm storage switching chamber 2b is heated to keep the product warm. At this time, the dedicated refrigeration room 2a is
As in the case of the refrigerating operation, the fan motor 17 circulates cold air to cool the refrigerating chamber 2a.
The cold air flowing out from the discharge port 18 is transferred to the side wall 6'
It rises along the inside and hits the lower part of the suction duct 31. However, since the shutter 37 of the suction duct 31 is closed, all of the rising cold air flows along the lower surface of the partition wall 26 and the suction port 19
It gets sucked in even more. Further, at this time, the shutter 37' on the discharge duct 32 side is also closed, and the peripheral part of the partition wall 26 is sealed by the gasket 38, so cold air does not enter into the refrigerating/heating switching chamber 2b. This made it possible to keep it warm without causing any problems.

However, when the refrigerating/warming switching chamber 2b is set to hot storage, the openings 35b and 35b' of the suction duct 31 and the discharge duct 32 are shutters 37 and 37',
Although it is thermally separated from the refrigerating compartment 2a, since it is a single layer, there is a lot of heat loss, and the refrigerating/warming switching compartment 2
In order to maintain the temperature of b at a high level, a large amount of heater input is consumed. Further, since the shutter 37 is heated, the cold air discharged from the refrigeration compartment 2a is heated, and the operation rate of the cooling cycle becomes high. The temperature of the products around the suction duct 31 and discharge duct 32 of the refrigerating/warming switching chamber 2b has become low due to the influence of cold air from the refrigerating room 2a. Also shutter 37,3
7' is located at the bottom of the partition wall 26, so refrigeration and
When small products are placed in the heating switching chamber 2b, the openings 35a and 35 of the suction duct 31 and the discharge duct 32
In some cases, the product may fall into the container a', and since each shutter 37, 37' is closed at this time, the product stops at each shutter 37, 37'. However, this depressed product has the disadvantage that it is difficult to see, and even if it is found, it is difficult to take out.

When the storage room 2 is refrigerated, a part of the cold air discharged from the discharge port 18 passes through the opening 35b of the suction duct 31 and cools the refrigerating/warming switching room 2b. Since the cold air enters the refrigerating/warming switching room 2b only by dynamic pressure, the amount of cold air entering the refrigerating/warming switching room 2b is small and the product temperature is higher than in the refrigerating room 2a. Was.

Purpose of the Invention The present invention eliminates the drawbacks of the conventional example described above, and when the upper and lower storage compartments are set for hot storage and cold storage, heat loss in both compartments is further reduced, power is saved, and both compartments are When the product is refrigerated, the temperature of the product in the refrigerated/warm storage switching room is maintained lower by taking in a large amount of cold air.

Structure of the Invention In order to achieve the above object, the present invention provides a shutter that can be opened and closed on the upper and lower surfaces of the opening on both sides of the partition wall, and extends diagonally downward from the lower outer periphery of the opening of the suction duct in the partition wall. Equipped with an extending wind direction plate, it enables power-saving operation during combined refrigeration and heating operation, and maintains low product temperature in the refrigeration/warming switching room during refrigeration/warming switching operation.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, and the same components as those of the prior art will be given the same numbers and detailed explanations thereof will be omitted.

39, 39' are suction duct 31 and discharge duct 3
This is an upper shutter provided on the top surface of 2. L-shaped elongated plates 40 and 40' are installed in the longitudinal direction of the suction duct 31 and the discharge duct 32 from approximately the center of the outer side surfaces of the suction duct 31 and the discharge duct 32. Duct 3
The width of the grooves 42, 42' formed by the side surfaces of the upper shutter 3 and the L-shaped elongated plates 40, 40' is equal to the width of the upper shutter 3.
It is slightly larger than the thickness of 9.39'. Further, on the surface facing the openings 35a, 35a', cut and raised portions 41, 41' are provided throughout the openings 35a, 35a' at the same height as the upper end height of the outer side surface. Further, a wind direction plate 43 is provided which extends from the outer periphery of the opening 35b at the lower part of the suction duct 31 toward the outside and obliquely downward along the suction duct 31 to the side wall 6.

Next, the operation of the above embodiment will be explained.

First, when the refrigerating/warming switching room 2b is set to refrigerate, that is, when the storage room 2 is set to refrigerate, the heater 33 is turned off by a switch (not shown).
The shutters 37, 37' are manually opened at the opening 35.
b, rotate upward to open 35b'. Also, the upper shutters 39, 39' have grooves 42, 4.
2' (the state shown by the solid line in Figure 8),
The upper shutters 39, 39' are installed vertically.
Therefore, the suction duct 31 and the discharge duct 32 are opened. The cold air discharged from the discharge port 18 flows upward along the side wall 6' and hits the wind direction plate 43. Since the wind direction plate 43 extends diagonally downward, a portion of the cold air is guided by the wind direction plate 43, passes through the openings 35b and 35a, and enters the refrigerating/heating switching chamber 2b. After cooling the product by exchanging heat with the product in the refrigerating/heating switching chamber 2b, the product passes through the openings 35a' and 35b' of the discharge duct 32 and is sucked into the suction duct 31. Also, shutter 3
By displaying the product name "COLDDRINK" on 9 and 39', it is easy for product sellers to understand that the refrigerating/warming switching chamber 2b is in the refrigerated state (No. 9
figure).

Next, when the refrigerating/warming switching chamber 2b is set to hot storage, the heater 33 is turned on by a switch (not shown), and the shutters 37, 37' are manually moved downward to close the openings 35a, 35a'. Rotate. Further, the upper shutters 39, 39' are pulled out from the grooves 42, 42' and applied to the cut and raised portions 41, 41' to close the openings 35a, 35a'. In this way, the suction duct 31 and the discharge duct 32 are thermally insulated by the double shutters. Therefore, the lower surfaces of the shutters 37, 37' are extremely less susceptible to the thermal influence of the heater 33, and the cold air discharged into the refrigeration compartment 2a is not heated by the shutters, so the operating rate of the cooling cycle can be lowered. Conversely, the heat influence on the refrigerating/warming switching chamber 2b is reduced, and the heater 3
3 input consumption can be reduced.

Furthermore, the influence of heat on the products around the suction duct 31 and the discharge duct 32 is reduced, and the temperature distribution of the products can also be reduced.

Further, since the upper shutters 39, 39' are provided above the suction duct 31 and the discharge duct 32, there is an advantage that small products will not fall into the respective ducts 31, 32.

Effects of the Invention As is clear from the above embodiments, the present invention provides a shutter that can be opened and closed on the upper and lower surfaces of the opening on both sides of the partition wall, and that is diagonally outward from the lower outer periphery of the opening of the suction duct in the partition wall. By providing a wind direction plate that extends downward, it not only enables power-saving operation when the storage room is used for both refrigeration and heating, but also reduces the temperature distribution of the products in the greenhouse, and also allows the storage room to be used for both refrigeration and heating. It has the advantage that the temperature of the product placed in the refrigerated/warm storage switching chamber can be maintained at a lower temperature during the heating operation.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional refrigerated/heated storage case, Figure 2 is a central sectional view of Figure 1, and Figure 3 is a perspective view of a conventional refrigerated/heated storage case.
4 is an enlarged sectional view of the main part of FIG. 1, and FIG. 5 is a refrigeration system showing an embodiment of the present invention.
A perspective view of the warming storage case, FIG. 6 is a sectional view of the center of FIG. 5, and FIG. 7 is a sectional view of the partition wall of FIG. 5.
FIG. 8 is an enlarged sectional view of the main part of FIG. 5, and FIG. 9 is a perspective view of FIG. 5 during refrigeration operation. 2...Storage room, 3...Cooling room, 5...Opening,
6, 6'... Left and right sides, 16... Evaporator, 17...
...Fan motor, 18...Discharge port, 19...Suction port, 26...Partition wall, 33...Heater, 35a,
35b, 35a', 35b'...opening, 37,3
7'... Shutter, 39, 39'... Upper shutter, 43... Wind direction plate.

Claims (1)

[Claims] 1. A storage chamber equipped with a door covering an opening formed in the front, a cooling chamber equipped with an evaporator and a fan motor that forcibly circulates cold air into the storage chamber, and a discharge chamber that communicates the cooling chamber and the storage chamber. A partition wall made of a heat insulating material is horizontally installed in the storage chamber, and an opening is provided in the partition wall on an extension of the discharge port and the suction port, and the upper and lower surfaces of the opening are provided with an opening. Refrigerating/warming storage comprising a shutter that can be opened and closed, a wind direction plate that extends outward and downward from the outer periphery of the lower part of the opening on the discharge port side, and a heater arranged in the center of the partition wall. Switchable case.