JP2001227875A - Cooler for heat resistant panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooler for heat resistant panel operable under high temperature while protecting electric components against heat in which workability of maintenance work is enhanced. SOLUTION: Electric components 50 including the control circuit for the cooler 1 of a heat resistant panel are disposed in a first chamber 9 and the operating section 52 of the electric components 50 disposed in the first chamber 9 is set to direct outward F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooler for a panel for cooling a control panel and the like, and more particularly to a cooler for a heat-resistant panel capable of cooling a compressor by a cooling cycle.

[0002]

2. Description of the Related Art Heretofore, there has been known a panel cooler for cooling a periphery of an evaporator by circulating the refrigerant by pumping the refrigerant from an evaporator to a condenser via a conduit by a compressor. FIG. 4 shows an example of such a cooler for a panel. The panel cooler 100 is installed, for example, on the back or side of the control panel 2. The panel cooler 100 includes a first chamber 9 and a second chamber
A chamber 10 is provided. 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.

The first chamber 9 has an evaporator 4 and a first
The fan 11 is housed. The evaporator 4 and the first fan 11 are attached to the control surface 2 of the first chamber 9 on the control panel 2.
It is arranged in. The evaporator 4 cools the warm air Aw taken in from the control panel 2. The first fan 11
Sends the cool air Ac cooled by the evaporator 4 into the control panel 2. The evaporator 4 and the first fan 11 are disposed at positions where the warm air Aw and the cool air (cooling air) Ac flow (flow).

The second chamber 10 accommodates a compressor 3, electrical components 50, a condenser 6, and a second fan 12. The electrical component 50 includes a control circuit for controlling 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 outside air A1 taken in from the outer surface 31 on which the condenser 6 is provided, to the outside.

[0005] Next, referring to FIG.
The cooling system according to 0 will be briefly described. The compressor 3 pressurizes and circulates the refrigerant gasified in the evaporator 4 from the condenser 6 via the conduit 5 to the expansion valve 7. At this time, the refrigerant is gradually liquefied in the condenser 6 and the expansion valve 7. The expansion valve 7 indicated by a broken line is formed of an extremely thin tube. The refrigerant exits the expansion valve 7, has a low pressure in a relatively thick pipe in the evaporator 4, and vaporizes again, thereby removing 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 and passes through the evaporator 4 by the first fan 11, the warm air Aw is cooled by the evaporator 4 and Ac is sent into the control panel 2. On the other hand, in the condenser 6, while the refrigerant is
By passing outside air A1 through the condenser 6 by the fan 12,
The temperature of the refrigerant is decreasing. In this manner, the panel cooler 100 cools the inside of the control panel 2.

[0006]

However, in the prior art, when the cooler 100 is used for a long time, when the outside air temperature is high, the temperature inside the second chamber 10 becomes high due to the heat generated in the condenser 6 and the like. . Therefore, electrical components 50
Does not operate normally due to the heat. Therefore,
As a cooler for a heat-resistant panel, one in which the electric component 50 is installed in the control panel 2 and is of a remote control type,
Is housed in a first chamber 9.

However, in the former conventional technique of the remote control system, a space for accommodating the electric component 50 is required in the control panel 2. Further, in the latter conventional technique, since the electrical component 50 is housed in the first chamber 9, the cooler 1
Since the electrical component 50 must be checked from inside the control panel 2 at the time of the maintenance of 00, workability is poor.

Accordingly, an object of the present invention is to provide a cooler for a heat-resistant panel in which electrical components can be used at a high temperature without being affected by heat and workability during maintenance is improved. is there.

[0009]

In order to achieve the above-mentioned object, according to the present invention, a housing is divided into a first chamber and a second chamber by a partition wall, wherein the first chamber contains an evaporator, A condenser is housed in the second chamber, and the refrigerant is circulated by pumping the refrigerant to the condenser by a compressor from the evaporator via a conduit, and the air taken in from the panel is cooled by the evaporator. A heat-resistant panel cooler for blowing the cooling air from the first chamber provided to the panel into the panel, wherein an electrical component including a control circuit for controlling the heat-resistant panel cooler is provided in the first chamber. And an operation unit of the electrical component provided in the first chamber is provided facing the outside air.

In the second chamber, the outside air taken in from the surface provided with the condenser absorbs the heat energy of the refrigerant in the condenser, and the outside air having absorbed the heat energy is discharged. On the other hand, in the first chamber, the warm air taken in from the inside of the panel is cooled by the refrigerant in the evaporator that has absorbed the thermal energy and sent back into the panel. Thus, the inside of the panel can be cooled.

In the present invention, "partitioning" means that the air in the first chamber and the air in the second chamber are separated so that they do not circulate with each other. For example, a drain pan or the like is provided. Gaps and holes may be formed in the partition wall. The "compressor" is generally preferably contained in the second chamber. However, the present invention does not limit the arrangement position of the compressor.
It may be provided in the chamber. Further, the “panel” refers to a unit including a controller provided with a control panel and an operation unit in addition to a so-called control panel.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below 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 board surface 51 faces the outer surface 31.
The first chamber 9 is divided into an electrical room 91 and a cooling room 92 by a mounting plate 14 shown by a broken line. In the electrical equipment room 91, the electrical equipment 50 is accommodated by being fixed toward the outside air side F by the mounting plate. 1 and 2
As shown in (a) and (b), the electrical equipment room 91 is provided so that the board surface 51 can be removed from the housing 8 on the outside air side F. An operation unit 52 of the electrical component 50 is provided on the board surface 51 so as to be exposed toward the front of the outside air side F. As shown in FIG. 2B, the mounting plate 14 is provided with a plurality of through holes 15. This allows
As indicated by the two-dot chain line arrow in FIG. 1, the cooled air in the cooling chamber 92 flows from the through hole 15 into the electrical equipment chamber 91 and is convected. That is, the cooled air flows over the front and back of the mounting plate 14. The partition wall 1
3 is provided with a heat insulating material.

As shown in FIG. 1, the second chamber 10
A plurality of second fans 1 above and below the condenser 6
2 are provided. The second fan 12 is provided slightly inclined with respect to the outer surface 31 as clearly shown in FIG. This prevents the air discharged from the second chamber 10 from being taken into the condenser 6 again.

Next, referring to FIG. 3, the heat-resistant panel cooler 1 will be described.
Will be briefly described. The cooling system of the heat-resistant panel cooler 1 includes a bypass path 70, a first pressure regulating valve 71, and a sensor 73.
The bypass path 70 is configured such that an expansion valve 7 a branched at a branch point D of the expansion valve 7 is connected 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 increases. The sensor 73 detects the rise in the temperature and outputs the signal (predetermined trigger). The first and second
The 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.

When the sensor 73 senses a rise in temperature, predetermined control is performed based on a signal output from the sensor 73, and each of the pressure regulating valves 71 and 72 regulates the pressure of the refrigerant.
Thereby, a part of the refrigerant whose temperature has decreased in the condenser 6
It is returned to the compressor 3 from the bypass path 70. Therefore, the refrigerant whose temperature has decreased is sent to the compressor 3, so that
The compressor 3 can be cooled.

The other structure is the same as that of the conventional example shown in FIGS. 4 and 5, and the same or corresponding portions are denoted by the same reference characters, and detailed description and illustration thereof will be omitted.

In this embodiment, the electric component 50 shown in FIG.
Is provided on the front side toward the outside air side F, but need not always be provided on the front side. For example, board 5
It may be provided on one side.

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.

Further, according to the present invention, a plurality of second fans 12 are provided.
The number, arrangement, and angle of are not limited, and any configuration may be used as long as the outside air A1 taken into the second chamber 10 can be efficiently exhausted to the outside.

[0020]

As described above, according to the present invention,
Since the electrical components are provided in the first chamber through which the cool air cooled by the evaporator passes, the electrical components are cooled by the cooling air in the first chamber, so that a rise in the temperature of the electrical components can be suppressed. The product works properly. In particular, since the operation part of the electrical component is provided so as to be exposed toward the outside air, maintenance of the electrical component can be easily performed from outside the heat-resistant panel cooler. Therefore, workability during maintenance is significantly improved. Further, if the panel surface provided with the operation unit of the electrical component can be detached from the housing, the workability during maintenance is further improved.

Further, if a plurality of through holes are provided in the mounting plate, the air cooled by the evaporator flows over the front and back of the mounting plate. Therefore, the electrical components are sufficiently cooled.

[Brief description of the drawings]

FIG. 1 is a side layout diagram of a heat-resistant panel cooler according to an embodiment of the present invention.

FIG. 2A is a front view showing a state in which a board surface is attached,
(B) is a front view which shows the time of removal of a board surface.

FIG. 3 is a conceptual diagram of a heat-resistant panel cooler showing a flow of a refrigerant.

FIG. 4 is a side view layout diagram showing a conventional example.

FIG. 5 is a conceptual diagram showing a flow of a conventional refrigerant.

[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 equipment 51: Board 52: Operation unit 70: Bypass path F: Outside air side

Claims (5)

[Claims] 1. A housing is divided into a first chamber and a second chamber by a partition wall, wherein the first chamber houses an evaporator, the second chamber houses a condenser, and The first chamber in which the refrigerant is circulated by pumping the refrigerant to the condenser by a compressor via a conduit, air taken in from the panel is cooled by the evaporator, and the cooling air is provided facing the panel. An electrical component including a control circuit for controlling the cooler for heat-resistant panel is provided in the first chamber, and the electrical component provided in the first chamber. A heat-resistant panel cooler provided with an operation unit for operating the unit exposed to the outside air side. 2. The method according to claim 1, wherein a mounting plate is provided in the first chamber, the electrical component is fixed to the mounting plate, and a plurality of through-holes are provided in the mounting plate to allow the air in the first chamber to flow through the first chamber. Cooler for heat-resistant panels that can be distributed over both sides of the mounting plate. 3. The cooler for a heat-resistant board according to claim 1, wherein a board surface provided with the operation unit is detachable from the housing. 4. The heat-resistant panel cooler according to claim 1, wherein the partition wall includes a heat insulating material. 5. The bypass according to claim 1, wherein a part of the refrigerant sent from the compressor to the condenser is returned to the compressor by a predetermined trigger without passing through the evaporator. Heat-resistant board cooler with a channel.