JP4935609B2 - How to use the reactor - Google Patents

Description

  The present invention relates to a reactor, and more particularly to a reactor that can be efficiently cooled by applying an existing refrigerant.

  Conventionally, in an element using a coil such as a power transformer, a technique has been proposed in which a ventilation hole is provided in a portion having the highest temperature of the element, and a fan is provided at one end of the ventilation hole to perform air cooling. 1 is disclosed.

JP 2001-237122 A

  However, in the technique disclosed in Patent Document 1, it is necessary to provide a separate fan in addition to the power transformer. Therefore, even if the core of the power transformer itself is downsized, it is difficult to downsize as a whole. In addition, there is a problem that the manufacturing process becomes complicated and the cost increases. Furthermore, air cooling has a problem that cooling efficiency is low.

  An object of this invention is to provide the technique which can be cooled efficiently with a simple structure in view of the said subject.

In order to solve the above problems, the first invention is a method of using a reactor applied to an inverter that controls a compressor used in a refrigeration cycle, and the reactor (100) extends in one direction. A core (20a); at least one cooling pipe (60) through which a coolant flows; and a coil (30) wound around the core and the cooling pipe . A refrigeration refrigerant used in the refrigeration cycle is employed as the refrigerant .

  2nd invention is 1st invention, Comprising: At least 1 of the said cooling pipe (60) is embed | buried under the said core (20a).

  3rd invention is 1st or 2nd invention, Comprising: At least 1 of the said cooling pipe (60) is equidistant from the several surface where the said core (20a) contact | connects the said coil (30). It penetrates in the one direction at a position.

  A fourth invention is any one of the first to third inventions, wherein an E-type core (20) and an I-type core (10) are employed, and the core (20a) is a center of the E-type core. The leg.

  A fifth invention is any one of the first to fourth inventions, wherein a plurality of the cooling pipes (60) are provided.

  6th invention is 4th or 5th invention, Comprising: In the cross section perpendicular | vertical to the said one direction, cross-sectional area S1 of the said core (20a), and total cross-sectional area S2 of the said cooling pipe (60) The ratio is S2 / S1 = 0.025-0.05.

7th invention is 1st invention, Comprising: The said frozen refrigerant | coolant (70) before a compression process flows into the said cooling pipe (60) after the evaporation process of the said refrigerating cycle.

8th invention is 1st invention, Comprising: The said refrigerating refrigerant | coolant (70) before a condensing process flows into the said cooling pipe (60) after the compression process of the said refrigerating cycle.

A ninth invention is any one of the first to eighth inventions, wherein the refrigerant also cools the in-vehicle generator, and the reactor functions as a boost reactor applied to the in-vehicle generator.

A tenth invention is any one of the first to ninth inventions, wherein the core (10, 20) is formed of a non-oriented steel plate.

According to the first aspect, since the cooling pipe is embedded in the core, the reactor can be efficiently cooled with a simple configuration. Further, by adopting the cooling pipe, the degree of freedom in the arrangement of the path through which the refrigerant flows is higher than in the case of simply ventilating with air. In addition, since a refrigerant having a high cooling efficiency can be flowed, a cooling pipe having a diameter smaller than that of the ventilation hole can be adopted, and the core can be downsized without deteriorating the characteristics.
A refrigerating cycle is adopted in an air conditioner or a refrigerator / refrigerator, and a compressor that compresses a refrigerant is usually used. When the compressor is controlled by an inverter and the reactor is used for the inverter, the existing refrigerant can be used to efficiently cool the compressor.

  According to the second aspect of the invention, the heat generated by the copper loss of the coil can be efficiently cooled, and consequently the reactor can be efficiently cooled.

  In general, since the center portion of the core around which the coil is wound is the highest temperature in the reactor, the reactor can be efficiently cooled according to the third aspect of the invention.

  When the EI core is adopted as the reactor core, the coil is wound around the center leg of the E-type core. Therefore, according to the fourth aspect, the reactor can be efficiently cooled.

  According to the fifth aspect, the reactor can be cooled with higher efficiency.

  According to the sixth aspect, the reactor can be efficiently cooled without deteriorating the electrical characteristics of the reactor.

According to the seventh aspect , the cooling efficiency of the reactor can be increased and the size can be reduced.

According to the eighth invention, the reactor can be cooled without significantly reducing the efficiency of the existing refrigeration cycle.

According to the ninth aspect, the reactor can be efficiently cooled using the cooling refrigerant for the existing on-vehicle generator.

According to the invention of the first 0, it costs.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In the following drawings including FIG. 1, only elements related to the present invention are shown.

<First Embodiment>
<Constitution>
Drawing 1 is a top view (a) and longitudinal section (b) showing reactor 100 concerning an embodiment of the present invention. In the reactor 100, an I-type core 10 and an E-type core 20 are adopted, and a central leg 22 of the E-type core extends in one direction. Here, the I-type core 10 and the E-type core 20 are formed of non-oriented steel plates.

  The reactor 100 includes at least one cooling pipe 60 through which the refrigerant flows, and a coil 30 wound around the core 22 and the cooling pipe 60. In FIG. 1, the case where the cooling pipe 60 is single is shown.

  The cooling pipe 60 (at least one of them) is embedded in the leg 22, and preferably penetrates in one direction in which the leg 22 extends at a position where the leg 22 is equidistant from a plurality of surfaces in contact with the coil 30. Yes. That is, the cooling pipe 60 penetrates along the winding axis P of the coil 30 being wound. In addition, when the leg 22 is exhibiting substantially cylindrical shape, it is desirable to have penetrated along the central axis of this cylinder. The cooling pipe 60 penetrates the leg 22 and also penetrates the I-type core 10 at a portion where the leg 22 joins the I-type core 10. In other words, the I-type core 10 and the E-type core 20 are joined to form the core of the reactor 100, and the cooling pipe 60 passes through the core in the direction in which the legs 22 extend.

  Note that a filler 40 is disposed between the I-type core 10 and the legs 22, and the cooling pipe 60 also penetrates the filler 40. Fillers 41 and 43 are also disposed between the legs 21 and 23 on both sides of the E-type core 20 and the coil 30, respectively.

  FIG. 2 is a plan view of the E-type core 20 and shows a surface to which the I-type core 10 is joined. In a cross section perpendicular to one direction in which the leg 22 extends, the ratio of the cross sectional area S1 of the leg 22 to the total cross sectional area S2 of the cooling pipe 60 is set in consideration of the electrical characteristics of the core, the cooling efficiency, and the like. . Specifically, it is desirable that S2 / S1 = 0.025 to 0.05.

  FIG. 3 is a diagram illustrating the flow of the refrigerant. As the refrigerant flowing through the cooling pipe 60, for example, a refrigeration refrigerant 70 used in a refrigeration cycle is adopted, and applied to an inverter that controls a compressor (not shown) used in the refrigeration cycle. In the present embodiment, as shown in FIG. 3, the refrigeration refrigerant 70 before the compression step flows through the cooling pipe 60 after the evaporation step of the refrigeration cycle (flows from the top to the bottom in the drawing). In addition, after the compression process of this refrigerating cycle, you may make it the refrigerating refrigerant | coolant 70 before a condensing process flow into the cooling pipe 60 (flowing from the bottom to the top in the figure).

  The refrigeration refrigerant 70 flowing into the compressor is at a low temperature, and the refrigeration refrigerant 70 flowing out from the compressor is at a high temperature. Therefore, by cooling the reactor 100 using the refrigeration refrigerant 70 flowing out from the compressor, even if the originally high temperature refrigeration refrigerant 70 becomes even higher in temperature, it is condensed later in the condenser and latent heat is taken away. The overall efficiency drop is negligible.

  On the other hand, if the refrigeration refrigerant 70 flowing into the compressor has already cooled the reactor 100, the temperature of the refrigeration refrigerant 70, which should be low-temperature and low-pressure, has risen and is not compressed and the volume does not change, so the volume is large. . Therefore, the burden on the compressor that compresses the volume of the refrigeration refrigerant 70 increases. That is, the efficiency of the refrigeration cycle may be reduced. However, the reactor 100 is cooled by the low-temperature refrigeration refrigerant 70, whereby the reactor 100 can be cooled with high efficiency and can be downsized.

  FIG. 4 is a schematic diagram when the reactor 100 is applied to an air conditioner. When the reactor 100 is applied to an air conditioner (not shown), the reactor 100 can be efficiently cooled by connecting as follows with the power supply of the air conditioner. That is, when the power supply of the air conditioner is a single-phase power supply, the reactor 100 is cooled by being connected in series with the compressor motor as shown in FIG. When the power supply of the air conditioner is a three-phase power supply, as shown in FIG. 4 (b), the reactor 100 for each phase is connected in parallel and these are connected in series with the compressor motor, or The reactor 100 for each phase is connected in series, and this is connected in series with the compressor motor.

<Effects of First Embodiment>
By providing the above configuration, the cooling pipe 60 is embedded in the central leg 22 of the E-type core 20, so that the reactor 100 can be efficiently cooled with a simple configuration. In addition, by adopting the cooling pipe 60, the degree of freedom in the arrangement of the path through which the refrigerant (the refrigeration refrigerant 70) flows is higher than in the case of simply ventilating with air. In addition, since a refrigerant having a high cooling efficiency (refrigerant 70) can flow, the cooling pipe 60 having a diameter smaller than that of the ventilation hole can be adopted, and the size of the I-type core 10 and the E-type core 20 can be reduced without deteriorating. it can.

  In addition, since the cooling pipe 60 is embedded in the center leg 22 of the E-type core 20, heat generated by the copper loss of the coil 30 can be efficiently cooled, and thus the reactor 100 can be efficiently cooled.

  In general, the reactor 100 has the highest temperature at the center of the center leg 22 of the E-type core 20 around which the coil 30 is wound, so that the legs 22 are equidistant from a plurality of surfaces in contact with the coil 30. In position, the cooling pipe 60 penetrates in one direction in which the legs 22 extend, whereby the reactor 100 can be efficiently cooled.

  In the cross section perpendicular to one direction in which the leg 22 extends, the ratio of the cross sectional area S1 of the leg 22 to the total cross sectional area S2 of the cooling pipe 60 is set to S2 / S1 = 0.025 to 0.05. As a result, the reactor 100 can be efficiently cooled without deteriorating the electrical characteristics.

  In air conditioners and refrigerators / refrigerators, a refrigeration cycle is employed, and usually a compressor that compresses refrigerant is used. The compressor is controlled by an inverter, and by using the refrigeration refrigerant 70 as a refrigerant for cooling the reactor 100 in the inverter, the refrigerant can be efficiently cooled with a simple configuration using an existing refrigerant.

  In addition, since the refrigeration refrigerant 70 before the compression step flows after the evaporation step of the refrigeration cycle flows through the cooling pipe 60, the cooling efficiency of the reactor 100 can be increased and the size can be reduced. Alternatively, since the refrigeration refrigerant 70 before the condensing step flows through the cooling pipe 60 after the compression step of the refrigeration cycle, the reactor 100 can be cooled without significantly reducing the efficiency of the existing refrigeration cycle.

  Moreover, the cost can be reduced by forming the I-type core 10 and the E-type core 20 from non-oriented steel plates.

Second Embodiment
Although the case where the cooling pipe 60 is single was demonstrated in the said embodiment, this invention is not limited to this. Here, a case where there are a plurality of cooling pipes 60 will be described as a second embodiment based on the above-described embodiment with reference to the drawings. In the present embodiment, unless otherwise specified, configurations having the same functions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

<Constitution>
FIG. 5 is a diagram showing a plan view of the E-type core 20a according to the second embodiment of the present invention, and shows from the surface to which the I-type core 10 is joined. The leg 22a is a leg at the center of the E-type core 20 like the leg 22 of the first embodiment. The leg 22a is provided with a plurality of cooling pipes 60a to 60d, which are embedded in the same direction as the cooling pipe 60 of the first embodiment and penetrate the I-type core 10 (not shown) and the E-type core 20. .

  In this embodiment, although the aspect provided with the four cooling pipes 60a-60d is shown, it does not necessarily need to be four. However, as shown in the first embodiment, the ratio of the cross-sectional area S1 of the leg 22a and the total cross-sectional area S2 of the cooling pipes 60a to 60d satisfies S2 / S1 = 0.025 to 0.05. It is desirable.

  FIG. 6 is a diagram showing the flow of the refrigerant 70a. The reactor shown by this embodiment functions as the pressure | voltage rise reactor 100a applied to a vehicle-mounted generator (illustration omitted), and the refrigerant | coolant 70a for cooling the pressure | voltage rise reactor 100a also cools a vehicle-mounted generator. When the refrigerant 70a cools the boost reactor 100a and the on-vehicle generator, the influence of the difference in the temperature of the refrigerant 70a on the cooling efficiency of the on-vehicle generator is general as compared with the refrigeration cycle in the first embodiment. Therefore, it is arbitrary whether the refrigerant 70a cools the boost reactor 100a after cooling the on-vehicle generator or cools the boost reactor 100a after cooling the on-vehicle generator.

<Effects of Second Embodiment>
As described above, by providing a plurality of cooling pipes 60a to 60d, the boost reactor 100a can be cooled with higher efficiency.

  Moreover, since the refrigerant 70a also cools the on-vehicle generator and the reactor functions as a boost reactor 100a applied to the on-vehicle generator, the boost reactor is efficiently utilized by using the cooling refrigerant 70a of the existing on-vehicle generator. 100a can be cooled.

<Modification>
As mentioned above, although the suitable aspect of this invention was demonstrated, this invention is not limited to this. FIG. 7 is a cross-sectional view of a reactor 100b showing a modification of the present invention. For example, as shown in FIG. 7, a part of the cooling pipe 61 may be exposed on the side surface of the leg 22b. Thereby, the cooling pipe 61 can be easily disposed on the leg 22b.

It is the top view and sectional drawing which show the reactor which concerns on 1st Embodiment of this invention. It is a top view of an E type core. It is a figure which shows the flow of a refrigerant | coolant. It is the schematic at the time of applying a reactor to an air conditioner. It is a top view of the E type core concerning a 2nd embodiment of the present invention. It is a figure which shows the flow of a refrigerant | coolant. It is sectional drawing of the reactor which shows the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Reactor 10 I type core 20, 20a E type core 22, 22a, 22b Leg 30 Coil 60, 60a-60d, 61 Cooling pipe 70 Refrigeration refrigerant 71 Refrigerant S1 Cross section S2 Total cross section

Claims (10)

A method of using a reactor applied to an inverter for controlling a compressor used in a refrigeration cycle,
The reactor is
A core (20a) extending in one direction;
At least one cooling pipe (60) through which refrigerant flows;
A coil (30) wound around the core and the cooling pipe ,
The use method of the reactor which employ | adopts the refrigeration refrigerant | coolant used for the said refrigeration cycle as said refrigerant | coolant . Te said reactor (100) smell,
The method of using a reactor according to claim 1 , wherein at least one of the cooling pipes (60) is embedded in the core (20a). Te said reactor (100) smell,
Wherein the at least one cooling tube (60), said core (20a) penetrates in the one direction at a position that is equidistant from a plurality of surface in contact with said coil (30), according to claim 1 or claim 2, wherein How to use the reactor. Te said reactor (100) smell,
E type core (20) and I type core (10) are adopted,
The method of using a reactor according to any one of claims 1 to 3, wherein the core (20a) is a central leg of the E-shaped core. Te said reactor (100) smell,
The usage method of the reactor in any one of Claims 1 thru | or 4 with which the said cooling pipe (60) is provided with two or more. Te said reactor (100) smell,
In the cross section perpendicular to the one direction, the ratio of the cross-sectional area S1 of the core (20a) to the total cross-sectional area S2 of the cooling pipe (60) is S2 / S1 = 0.025 to 0.05. The usage method of the reactor in any one of Claim 4 or Claim 5 .   The method of using a reactor according to claim 1, wherein the refrigeration refrigerant (70) before the compression step flows through the cooling pipe (60) after the evaporation step of the refrigeration cycle.   The method of using a reactor according to claim 1, wherein the refrigerant (70) after the compression step of the refrigeration cycle and before the condensation step flows through the cooling pipe (60).   The refrigerant also cools the onboard generator,
  The usage method of the reactor as described in any one of Claim 1 thru | or 8 with which the said reactor functions as a pressure | voltage rise reactor applied to the said vehicle-mounted generator.   In the reactor (100),
  The usage method of the reactor as described in any one of Claim 1 thru | or 9 with which the said core (10, 20) is formed with a non-oriented steel plate.

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