JP2006329554A - Cooling unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling unit attaining energy saving without enlarging structure. <P>SOLUTION: The cooling unit having a refrigerating cycle allowing a refrigerant to flow through an electric compressor 3, a condenser 4 and an evaporator 5, comprises a cooling chamber 7 covering the periphery of the evaporator 5 with a resin foam heat insulating material 6 and forming an air course inside, and a machine chamber 8 with the electric compressor 3 and the condenser 4 disposed at the side of the cooling chamber 7, wherein a vacuum heat insulating material is stuck to the machine chamber 8 side outer peripheral surface of the cooling chamber 7 to attain energy saving without enlarging the structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technology of a cooling unit that is attached to a device that stores and stores food and the like and adjusts the temperature inside the device.

  For example, Patent Document 1 discloses a conventional cooling unit.

  The conventional cooling unit will be described below with reference to the drawings.

  FIG. 7 is a perspective view of a low temperature storage with a cooling unit attached. 8 is a plan sectional view of a conventional cooling unit, FIG. 9 is a vertical sectional view of a cooling chamber of the conventional cooling unit, and FIG. 10 is an exploded perspective view of a resin foam heat insulating material of the conventional cooling unit.

  The storage body is mainly composed of a storage chamber 1 for storing food and a cooling unit 2 disposed on the upper surface of the storage chamber 1. The cooling unit 2 includes a refrigeration cycle mainly composed of an electric compressor 3, a condenser 4 and an evaporator 5, and the evaporator 5 is covered with a resin foam heat insulating material 6 to form an air passage inside. A cooling chamber 7 is formed. Further, a machine room 8 is formed which is located on the side of the cooling chamber 7 and in which the electric compressor 3 and the condenser 4 are disposed.

  As shown in FIG. 7, the storage body has a heat insulating structure and is formed to a size that can store brown rice, vegetables, and other foods. The front surface can be opened and closed by a door 9. Is attached. In order to prevent the taste of the food to be stored from deteriorating, cold air is introduced into the storage chamber 1 and circulated by the cooling unit 2 as means for maintaining the atmosphere in the storage chamber 1 under appropriate conditions.

  As shown in FIG. 8, the cooling unit 2 includes a refrigeration cycle including cooling portions of the electric compressor 3, the condenser 4, and the evaporator 5. Reference numeral 10 denotes a fan attached to the evaporator 3.

  As shown in FIG. 9, the cooling unit 2 communicates with the inside of the storage chamber 1 through a suction port 11 provided on the upstream side of the evaporator 5 and a blowout port 12 provided on the downstream side of the evaporator 5. .

  Then, the air in the storage chamber 1 flows into the evaporator 5 from the suction port 11 by the fan 10 and exchanges heat, and the heat exchange and cold air flows out from the outlet 12 into the storage chamber 1. Cold air circulates in the interior 1 to adjust the temperature in the storage chamber 1. Since the portion of the evaporator 5 is the coldest region in the refrigeration cycle, it is surrounded by a resin foam heat insulating material 6 to block the outside air in order to avoid contact with the outside air and being affected by the outside air temperature. Yes.

  As shown in FIG. 10, the resin foam heat insulating material 6 has a function and shape for holding the internal components of the cooling chamber 7, and therefore a resin foam material is used from the viewpoint of freedom of molding.

  On the other hand, in the machine room 8, heat radiation is promoted from the condenser 4 and the electric compressor 3 which are heated by introducing outside air, thereby forming a healthy refrigeration cycle. At that time, the machine room 8 becomes a high temperature region with respect to the outside air.

Recently, there is a strong demand for energy saving from a user even in a storage, and when energy saving is promoted as a storage, it is important to suppress the amount of heat entering the cooling chamber 7.
JP 2002-81846 A

  However, since the conventional cooling chamber 7 is exposed to the outside air or the air of the machine chamber 8 and has a relatively large amount of heat penetration, the conventional cooling chamber 7 performs a function and shape for holding the internal components of the cooling chamber 7. Resin foam material is used because of the degree of freedom, and heat insulation has a limit. In order to compensate for this, it is necessary to increase the thickness of the resin foam heat insulating material 6, and there is a problem that the structure of the cooling unit 2 is enlarged.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a cooling unit that can save energy without increasing the size of the structure.

  The cooling unit of the present invention is obtained by attaching a vacuum heat insulating material with good heat insulation to a cooling chamber.

  Thereby, the amount of heat penetration from the outside into the cooling chamber can be suppressed.

  The cooling unit of the present invention can save energy without increasing the size.

  The invention according to claim 1 is provided with a refrigeration cycle for circulating a refrigerant through an electric compressor, a condenser, and an evaporator, and the periphery of the evaporator is covered with a resin foam heat insulating material to form an air passage inside. A cooling chamber that is a low-temperature part by attaching a vacuum heat insulating material to the cooling chamber on the blow-out side of the fan attached to the evaporator. By shutting off the blower side of the chamber fan and the outside with a vacuum heat insulating material and suppressing the amount of heat entering the cooling chamber from the outside, energy can be saved without increasing the size of the cooling unit.

  The invention according to claim 2 is the low temperature part by sticking a vacuum heat insulating material to the outer peripheral surface of the cooling chamber on the blowing side of the fan attached to the evaporator in the invention according to claim 1. By shutting off the blow-out side of the cooling chamber fan and the outside with a vacuum heat insulating material and suppressing the amount of heat entering the cooling chamber from the outside, energy can be saved without increasing the size of the cooling unit.

  According to a third aspect of the present invention, in the first aspect of the present invention, the mechanical shock is applied by attaching a vacuum heat insulating material to the inner peripheral surface of the cooling chamber on the blowing side of the fan attached to the evaporator. It becomes difficult to receive, and deterioration of heat insulation performance can be prevented.

  The invention according to claim 4 is provided with a refrigeration cycle for circulating a refrigerant through an electric compressor, a condenser, and an evaporator, and the periphery of the evaporator is covered with a resin foam heat insulating material to form an air passage inside. And a machine room in which the electric compressor and the condenser are arranged on the side of the cooling chamber. By blocking with a vacuum insulation material, the amount of heat intrusion from the outside into the cooling chamber, especially the amount of heat intrusion from the machine room, which is a high-temperature part, can be suppressed, so that further energy saving can be achieved without increasing the size of the cooling unit. it can.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, a vacuum heat insulating material is attached to the outer peripheral surface of the cooling chamber on the machine room side, so that the machine room that becomes a high temperature part and the outside are vacuumed. It is possible to achieve further energy savings without increasing the size of the cooling unit by blocking heat insulation and reducing the amount of heat entering the cooling chamber from the outside, especially the amount of heat entering from the machine room that is the high temperature part. .

  The invention according to claim 6 is the invention according to claim 4, wherein a vacuum heat insulating material is attached to the inner peripheral surface of the cooling chamber on the machine room side, so that it is less susceptible to mechanical shock, and heat insulation is performed. Degradation of performance can be prevented.

  The invention according to claim 7 is the invention according to claim 1 or 4, wherein a vacuum heat insulating material is attached to a plurality of outer peripheral surfaces or inner peripheral surfaces of the cooling chamber, so that the cooling chamber can be externally provided. By further reducing the amount of heat penetration, energy can be dramatically saved without increasing the size of the cooling unit.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a vertical sectional view of a cooling chamber of a cooling unit according to Embodiment 1 of the present invention. FIG. 2 is a vertical sectional view of a cooling chamber of another cooling unit in the same embodiment.

  101 is a vacuum heat insulating material affixed to the outer peripheral surface of the cooling chamber 7 on the blowing side of the fan 10 attached to the evaporator 5.

  The operation of the cooling unit configured as described above will be described below.

  Since the operation of cooling the storage of the cooling unit is the same as that of the conventional example, the description thereof is omitted.

  On the blowing side of the fan 10 attached to the evaporator 5, the wind once hits the surface of the resin foam heat insulating material 6 and the heat transfer coefficient is locally increased, but the vacuum heat insulation attached to the outer peripheral surface of the resin foam heat insulating material 6. The amount of heat penetration is suppressed by the material 101.

  In the present embodiment, an example in which the blowout side of the fan 10 is opposite to the machine room 8 has been described. However, depending on the layout of the evaporator 5 and the fan 10 in the cooling chamber 7, the machine room side or the cooling side A vacuum heat insulating material may be affixed to the front and back surfaces of the unit.

  In the present embodiment, the fan 10 is attached to the evaporator 5, but the same effect can be obtained even if the fan 10 is not attached to the evaporator 5 (not integrated with the evaporator). .

  As described above, in this embodiment, the electric compressor 3, the condenser 4, and the evaporator 5 are provided with a refrigeration cycle, and the periphery of the evaporator 5 is covered with the resin foam heat insulating material 6 and the interior is blown with air. A cooling chamber 7 having a passage formed therein and a machine chamber 8 in which the electric compressor 3 and the condenser 4 are disposed. Vacuum insulation is provided on the outer peripheral surface of the cooling chamber 7 on the blow-out side of the fan 10 attached to the evaporator 5. By adhering the material 101, the blowout side of the fan 10 of the cooling chamber 7 which is a low temperature part and the outside are blocked by the vacuum heat insulating material 101, and the amount of heat entering the cooling chamber 7 from the outside can be suppressed. Energy saving can be achieved without increasing the size.

  In addition, the heat insulating performance of the vacuum heat insulating material 102 is severely deteriorated due to mechanical impact, and the possibility is rare if there is a decorative board as shown in FIG. Since the heat insulating material may be mechanically and accidentally subjected to mechanical shock, it is effective to attach the vacuum heat insulating material 102 to the inner peripheral surface of the cooling chamber on the machine room side.

(Embodiment 2)
FIG. 3 is a vertical sectional view of the cooling chamber of the cooling unit according to Embodiment 2 of the present invention. FIG. 4 is a vertical sectional view of a cooling chamber of another cooling unit in the same embodiment.

  103 is a vacuum heat insulating material affixed to the outer peripheral surface of the cooling chamber 7 on the machine chamber 8 side.

  The operation of the cooling unit configured as described above will be described below.

  Since the operation of cooling the storage chamber of the cooling unit is the same as in the conventional example, the description thereof is omitted.

  The inside of the machine room 8 is generally about 50 to 60 ° C., the inside of the cooling room 7 is generally around 0 ° C., and the temperature difference between the machine room 8 and the cooling room 7 is very large.

  However, the amount of heat intrusion from the outside into the cooling chamber 7, particularly the amount of heat intrusion from the machine chamber 8, which is a high temperature portion, can be suppressed by the vacuum heat insulating material 103.

  In the present embodiment, the fan 10 is attached to the evaporator 5, but the same effect can be obtained even if the fan 10 is not attached to the evaporator 5 (not integrated with the evaporator). .

  As described above, in this embodiment, the electric compressor 3, the condenser 4, and the evaporator 5 are provided with a refrigeration cycle, and the periphery of the evaporator 5 is covered with the resin foam heat insulating material 6 and the interior is blown with air. A cooling chamber 7 having a passage and a machine chamber 8 in which the electric compressor 3 and the condenser 4 are arranged on the side of the cooling chamber 7, and a vacuum heat insulating material on the outer peripheral surface of the cooling chamber 7 on the machine chamber 8 side. By pasting 103, the machine room that becomes the high temperature part and the outside are shut off by the vacuum heat insulating material, and the amount of heat intrusion from the outside to the cooling room, especially the amount of heat intrusion from the machine room that becomes the high temperature part can be suppressed. Thus, further energy saving can be achieved without increasing the size of the cooling unit.

  Further, the heat insulating performance of the vacuum heat insulating material 104 is severely deteriorated due to mechanical impact, and the possibility is rare if there is a decorative board as shown in FIG. Since the heat insulating material may be mechanically and accidentally subjected to mechanical shock, it is effective to attach the vacuum heat insulating material 104 to the inner peripheral surface of the cooling chamber on the machine room side.

(Embodiment 3)
FIG. 5 is a vertical sectional view of the cooling chamber of the cooling unit according to Embodiment 3 of the present invention. FIG. 6 is a vertical sectional view of a cooling chamber of another cooling unit in the same embodiment.

  Reference numerals 105, 106, and 107 denote vacuum heat insulating materials attached to the outer peripheral surface of the cooling chamber 7 on the machine room 8 side, the outer peripheral surface of the counter machine room 8 side, and the top surface.

  The operation of the cooling unit configured as described above will be described below.

  Since the operation of cooling the storage of the cooling unit is the same as that of the conventional example, the description thereof is omitted.

  The amount of heat intrusion from the outside into the cooling chamber 7, particularly the amount of heat intrusion from the machine chamber 8, which is a high temperature part, is suppressed by the vacuum heat insulating material 105 on the machine room 8 side.

  Further, the vacuum heat insulating material 107 attached to the outer peripheral surface 106 and the top surface of the anti-machine room 8 suppresses the amount of heat intrusion from the outside air.

  As described above, in the present embodiment, the electric compressor 3, the condenser 4, and the evaporator 5 are provided with a refrigeration cycle that circulates the refrigerant, the periphery of the evaporator 5 is covered with the resin foam heat insulating material, and the air path is formed inside. And a mechanical chamber 8 in which the electric compressor 3 and the condenser 4 are disposed on the side of the cooling chamber 7, and vacuum heat insulating materials are attached to a plurality of outer peripheral surfaces of the cooling chamber 7. As a result, the amount of heat entering the cooling chamber from the outside is drastically suppressed, so that energy can be dramatically saved without increasing the size of the cooling unit.

  In this embodiment, the vacuum heat insulating material is pasted on the three surfaces of the cooling chamber, but the same effect can be obtained even when pasted on the two surfaces.

  In addition, as shown in FIG. 6, the same effect can be obtained even if two surfaces are attached to the inner peripheral surface, and the effect of preventing the vacuum heat insulating materials 108 and 109 from mechanical impact as described above can also be expected.

  As described above, the cooling unit according to the present invention can provide a cooling unit that saves energy without increasing the size by attaching a vacuum heat insulating material to the outer peripheral surface of the cooling chamber. It can also be applied to applications.

Vertical sectional view of the cooling chamber of the cooling unit according to Embodiment 1 of the present invention. Vertical sectional view of a cooling chamber of another cooling unit in the same embodiment Vertical sectional view of the cooling chamber of the cooling unit according to Embodiment 2 of the present invention. Vertical sectional view of a cooling chamber of another cooling unit in the same embodiment Vertical sectional view of the cooling chamber of the cooling unit according to Embodiment 3 of the present invention Vertical sectional view of a cooling chamber of another cooling unit in the same embodiment A perspective view showing a low-temperature storage equipped with a conventional cooling unit Plan sectional view of a conventional cooling unit Vertical sectional view of the cooling chamber of a conventional cooling unit Disassembled perspective view of resin foam insulation of conventional cooling unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Electric compressor 4 Condenser 5 Evaporator 6 Resin foam insulation 7 Cooling room 8 Machine room 10 Fan 101, 102, 103, 104, 105, 106, 107, 108, 109 Vacuum insulation

Claims (7)

  A cooling chamber having a refrigeration cycle for circulating a refrigerant through an electric compressor, a condenser, and an evaporator, the periphery of the evaporator being covered with a resin foam heat insulating material, and an air passage formed therein; the electric compressor; A cooling unit comprising a machine room provided with a condenser and having a vacuum heat insulating material attached to the cooling room on the blow-out side of a fan attached to the evaporator.   The cooling unit according to claim 1, wherein a vacuum heat insulating material is attached to an outer peripheral surface of the cooling chamber on a blowing side of a fan attached to the evaporator.   The cooling unit according to claim 1, wherein a vacuum heat insulating material is attached to an inner peripheral surface of the cooling chamber on a blowing side of a fan attached to the evaporator.   A cooling chamber in which a refrigerant is circulated through an electric compressor, a condenser, and an evaporator, the periphery of the evaporator is covered with a resin foam heat insulating material, and an air passage is formed inside, and on the side of the cooling chamber A cooling unit comprising a machine room in which the electric compressor and the condenser are arranged, and a vacuum heat insulating material attached to the cooling room.   The cooling unit according to claim 4, wherein a vacuum heat insulating material is attached to an outer peripheral surface of the cooling chamber on the machine room side.   The cooling unit according to claim 4, wherein a vacuum heat insulating material is attached to an inner peripheral surface of the cooling chamber on the machine room side.   The cooling unit according to claim 1 or 4, wherein a vacuum heat insulating material is attached to a plurality of outer peripheral surfaces or inner peripheral surfaces of the cooling chamber.

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