JP4355079B2 - Cooler for heat-resistant panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a panel cooler that cools a control panel and the like, and more particularly to a heat-resistant panel cooler that can cool a compressor by a cooling cycle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a panel cooler that cools the periphery of an evaporator by circulating the refrigerant by pumping the refrigerant from an evaporator to a condenser through a conduit. An example of such a panel cooler is shown in FIG. The panel cooler 100 is installed, for example, on the back surface or side surface of the control panel 2. The panel cooler 100 includes a first chamber 9 and a second chamber 10 in which one casing 8 is partitioned by a partition wall 13. The first chamber 9 is provided facing the control panel 2 and communicates with the inside of the control panel 2. On the other hand, the second chamber 10 communicates with the outside air A1.
[0003]
The first chamber 9 contains an evaporator 4 and a first fan 11. The evaporator 4 and the first fan 11 are disposed on the mounting surface 30 of the first chamber 9 to the control panel 2. The evaporator 4 cools the warm air Aw taken from the control panel 2. The first fan 11 sends the cold air Ac cooled by the evaporator 4 into the control panel 2. The evaporator 4 and the first fan 11 are arranged at a position where warm air Aw and cold air (cooling air) Ac convect (flow).
[0004]
The second chamber 10 accommodates a compressor 3, an electrical component 50, a condenser 6 and a second fan 12. The electrical component 50 includes a control circuit that controls the cooler 1. The electrical component 50 is fixed inside the outer surface 31 of the second chamber 10. The operation unit 52 of the electrical component 50 is provided outside the outer surface 31. The second fan 12 discharges the outside air A1 taken in from the outer surface 31 where the condenser 6 is provided outward.
[0005]
Next, a cooling system using the panel cooler 100 will be briefly described with reference to FIG.
The compressor 3 circulates the refrigerant that has become a gas in the evaporator 4 by pumping it from the condenser 6 to the expansion valve 7 via the conduit 5. At this time, the refrigerant gradually liquefies in the condenser 6 and the expansion valve 7. The expansion valve 7 indicated by a broken line is an extremely thin tube. The refrigerant exits from the expansion valve 7, becomes a low pressure in a relatively thick pipe in the evaporator 4, and vaporizes again, thereby taking away the heat around the evaporator 4 and lowering the ambient temperature. Therefore, as shown in FIG. 4, when the warm air Aw in the control panel 2 is taken into the first chamber 9 by the first fan 11 and passes through the evaporator 4, the warm air Aw is cooled by the evaporator 4, Ac is fed into the control panel 2. On the other hand, in the condenser 6, the refrigerant is compressed to a high temperature, while the second fan 12 passes the outside air A <b> 1 through the condenser 6 to reduce the temperature of the refrigerant.
In this way, the panel cooler 100 cools the inside of the control panel 2.
[0006]
[Problems to be solved by the invention]
However, in the prior art, when the cooler 100 is used for a long time, when the outside air temperature is high, the inside of the second chamber 10 becomes high due to the heat generated in the condenser 6 or the like. Therefore, the electrical component 50 that is vulnerable to heat does not operate normally due to the influence of the heat. Therefore, as a heat-resistant panel cooler, one in which the electrical component 50 is installed in the control panel 2 and is of a remote control type, or one in which the electrical component 50 is accommodated in the first chamber 9 is known.
[0007]
However, in the former prior art of the remote control system, a space for accommodating the electrical component 50 is required in the control panel 2. In the latter prior art, since the electrical component 50 is accommodated in the first chamber 9, the electrical component 50 must be confirmed from the control panel 2 during maintenance of the cooler 100. Is bad.
[0008]
Accordingly, an object of the present invention is to provide a heat-resistant panel cooler that can be used at high temperatures without the electrical components being affected by heat, and the workability during maintenance is improved.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a casing is partitioned into a first chamber and a second chamber by a partition wall, an evaporator is accommodated in the first chamber, and a condenser is stored in the second chamber. The refrigerant is circulated by pumping the refrigerant from the evaporator through a conduit to the condenser through a conduit, and the air taken in from the board is cooled by the evaporator, and the cooling air faces the board. A heat-resistant panel cooler that blows air into the panel from the first chamber provided in the first chamber, wherein an electrical component including a control circuit that controls the heat-resistant panel cooler is disposed in the first chamber, and the first chamber The operation part of the electrical component provided inside is provided facing the outside air side.
[0010]
In the second chamber, the outside air taken in from the surface on which the condenser is provided absorbs the heat energy of the refrigerant in the condenser, and the outside air that has absorbed the heat energy is discharged. On the other hand, in the first chamber, the warm air taken in from the board is cooled by the refrigerant that has absorbed the thermal energy in the evaporator and sent back into the board. Thus, the inside of the board can be cooled.
[0011]
In the present invention, “partition” means that the air in the first chamber and the air in the second chamber are partitioned so as not to circulate with each other. For example, a gap or a hole in which a drain pan or the like is disposed. May be formed on the partition wall.
The “compressor” is generally preferably housed in the second chamber. However, the present invention does not limit the position where the compressor is disposed, and may be disposed in the first chamber, for example.
In addition to the so-called control panel, the “board” means a controller including a control panel and a controller provided with an operation unit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the first chamber 9 is provided between the mounting surface 30 and the outer surface 31, and the first fan 11 and the evaporator 4 face the mounting surface 30, while the outer surface 31 has a panel surface 51. Is facing. The first chamber 9 is divided into an electrical component chamber 91 and a cooling chamber 92 by a mounting plate 14 indicated by a broken line. An electrical component 50 is accommodated in the electrical chamber 91 by being fixed toward the outside air side F by the mounting plate 14. As shown in FIG. 1 and FIGS. 2A and 2B, the electrical chamber 91 is provided with a panel surface 51 that can be removed from the housing 8 on the outside air side F. On the panel surface 51, an operation unit 52 of the electrical component 50 is provided so as to be exposed toward the front side of the outside air side F. As shown in FIG. 2B, the mounting plate 14 is provided with a plurality of through holes 15. As a result, as indicated by the two-dot chain line arrow in FIG. 1, the cooled air in the cooling chamber 92 flows into the electrical component chamber 91 from the through hole 15 and is convected. That is, the cooled air flows over the front and back of the mounting plate 14. The partition wall 13 includes a heat insulating material.
[0013]
As shown in FIG. 1, a plurality of second fans 12 are provided above and below the condenser 6 on the outer surface 31 of the second chamber 10. As clearly shown in FIG. 1, the second fan 12 is provided to be slightly inclined with respect to the outer surface 31. Thereby, the air exhausted from the second chamber 10 is prevented from being taken into the condenser 6 again.
[0014]
Next, the cooling system using the heat-resistant panel cooler 1 will be briefly described with reference to FIG.
The cooling system of the heat-resistant panel cooler 1 is provided with a bypass path 70, a first pressure regulating valve 71, and a sensor 73. The bypass path 70 is formed by connecting an expansion valve 7 a branched at a branch point D of the expansion valve 7 to the conduit 5 via a second pressure regulating valve 72. The bypass path 70 returns a part of the refrigerant sent from the compressor 3 to the condenser 6 to the compressor 3 without passing through the evaporator 4 when the temperature of the outside air or the refrigerant rises. The sensor 73 senses the temperature rise and outputs the signal (predetermined trigger). The first and second pressure regulating valves 71 and 72 adjust the pressure of the refrigerant in response to the signal from the sensor 73, and send a part of the refrigerant whose temperature has decreased in the condenser 6 to the bypass path 70.
[0015]
When the sensor 73 senses a rise in temperature, predetermined control is performed by the signal output of the sensor 73, and the pressure regulating valves 71 and 72 adjust the refrigerant pressure. As a result, a part of the refrigerant whose temperature has decreased in the condenser 6 is returned from the bypass path 70 to the compressor 3. Therefore, since the refrigerant whose temperature has decreased is sent to the compressor 3, the compressor 3 can be cooled.
[0016]
Other configurations are the same as those of the conventional example shown in FIGS. 4 and 5, and the same reference numerals are given to the same portions or corresponding portions, and detailed description and illustration thereof are omitted.
[0017]
In addition, in this embodiment, although the operation part 52 of the electrical component 50 of FIG. 1 was provided in the front toward the external air side F, it does not necessarily need to be provided toward the front. For example, it may be provided on the side surface of the board surface 51.
[0018]
Further, the present invention does not limit the mounting position and shape of the mounting plate 14 and the shape and number of the plurality of through holes 15.
[0019]
Further, the present invention does not limit the number, arrangement, and angle of the plurality of second fans 12, but may be configured so that the outside air A <b> 1 taken into the second chamber 10 can be efficiently discharged outside. .
[0020]
【The invention's effect】
As described above, according to the present invention, since the electrical component is provided in the first chamber through which the cool air cooled by the evaporator passes, the electrical component is cooled by the cooling air in the first chamber. The temperature rise of the electrical component can be suppressed, and therefore the electrical component operates normally.
In particular, since the operation part of the electrical component is provided so as to be exposed to the outside air side, the electrical component can be easily maintained from the outside of the heat-resistant panel cooler. Therefore, workability at the time of maintenance is remarkably improved.
Furthermore, if the panel surface provided with the operation unit for electrical components can be removed from the housing, the workability during maintenance is further improved.
[0021]
Furthermore, if a several through-hole is provided in a mounting plate, the air cooled with the evaporator will distribute | circulate over the front and back of a mounting plate. Therefore, the electrical component is sufficiently cooled.
[Brief description of the drawings]
FIG. 1 is a side layout view of a heat-resistant panel cooler according to an embodiment of the present invention.
FIG. 2A is a front view showing when the board surface is attached, and FIG. 2B is a front view showing the board surface being removed.
FIG. 3 is a conceptual diagram of a heat-resistant panel cooler showing the flow of refrigerant.
FIG. 4 is a side layout diagram showing a conventional example.
FIG. 5 is a conceptual diagram showing the flow of refrigerant in a conventional example.
[Explanation of symbols]
1: Heat-resistant panel cooler 2: Control panel (panel)
3: Compressor 4: Evaporator 5: Conduit 6: Condenser 8: Housing 9: First chamber 10: Second chamber 13: Partition wall 14: Mounting plate 15: Through hole 50: Electrical component 51: Panel surface 52: Operation unit 70: bypass path F: outside air side

Claims (4)

The housing is partitioned into a first chamber and a second chamber by a partition wall, an evaporator is accommodated in the first chamber, a condenser is accommodated in the second chamber, and compression is performed from the evaporator through a conduit. The refrigerant is circulated by pumping the refrigerant to the condenser by a machine, the air taken in from the board is cooled by the evaporator, and the cooling air is blown into the board from the first chamber provided facing the board. A heat-resistant panel cooler,
An electrical component including a control circuit for controlling the heat-resistant panel cooler is disposed in the first chamber;
An operation unit for operating the electrical component provided in the first chamber is provided to be exposed toward the outside air side ,
A mounting plate is provided in the first chamber, and the electrical component is fixed to the mounting plate.
A heat-resistant panel cooler in which a plurality of through holes are provided in the mounting plate so that air in the first chamber flows over the front and back surfaces of the mounting plate . In claim 1,
A heat-resistant panel cooler in which a panel surface provided with the operation unit can be removed from the housing. In claim 1 or 2 ,
A heat-resistant panel cooler in which the partition wall is provided with a heat insulating material. In any one of Claims 1 thru | or 3 ,
A heat-resistant panel cooler comprising a bypass path for returning a part of the refrigerant sent from the compressor to the condenser to the compressor without passing through the evaporator by a predetermined trigger.

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