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Thermomagnetic cycle device

a cycle device and heat transport technology, applied in the direction of lighting and heating apparatus, machines using electric/magnetic effects, refrigerating machines, etc., can solve the problems of delay in reaction, heat is not fully carried by heat transport medium, and the desire for a phase may not be realized in some cases, so as to achieve the effect of convenient structur

Inactive Publication Date: 2020-10-08
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is for a device that can control the phase difference between two objects, even when the flow or reaction phase changes. The device is easy to use and has a simple structure. This helps to maintain the device's functions and make it more efficient in different flow or reaction phases.

Problems solved by technology

In the conventional technology, a desirable phase may not be realized in some cases.
For example, even if a magneto-caloric element generates heat, the heat is not fully carried by a heat transport medium.
Furthermore, the delay in reaction may change due to factors such as outside temperature, a kind of the heat transport medium, and degradation in components.
In another viewpoint, it is difficult to adjust a phase difference with easy realizable structure.

Method used

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Examples

Experimental program
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first embodiment

[0050]FIG. 1 illustrates an air-conditioner 10 for a vehicle, which is an example of thermal apparatus in a first embodiment. The air-conditioner 10 is carried in a vehicle, and adjusts temperature in a cabin of the vehicle. The air-conditioner 10 includes a magneto-caloric effect type heat pump device 11. The magneto-caloric effect type heat pump device 11 is also called as a MHP (Magneto-caloric effect Heat Pump) device 11. The MHP device 11 offers a thermomagnetic cycle device.

[0051]In this specification, the word of heat pump device is used in a broad sense. That is, the word of heat pump device includes both a device using coldness obtained by a heat pump device and a device using warmness obtained by a heat pump device. The device using coldness may also be called as a refrigerating cycle device. In this specification, the word of heat pump device is used as a concept which includes a refrigerating cycle device.

[0052]The MHP device 11 includes a magneto-caloric element 12. The...

second embodiment

[0113]This embodiment is a modification of the preceding fundamental embodiment. In the first embodiment, the flow phase is acquired by observing the flow of heat transport medium by the sensor 31, 32. In a second embodiment, the flow phase is acquired by predicting the amount of gas in a heat transport medium, which is caused by air bubbles.

[0114]As illustrated in FIG. 9, in Step 291, the control device 18 estimates a flow phase. The flow phase is presumed based on the presumed amount of air bubbles and a standard phase of the flow waveform generated by the heat transport device 14, without observing the flow direction of the heat transport medium. The air bubbles generated in the heat transport medium includes air bubbles generated when being less than a saturation pressure and / or a saturation temperature, and air bubbles generated by a cavitation. In this embodiment, the total amount Gv of air bubbles is presumed based on the amount Gvs of air bubbles presumed from the saturation...

third embodiment

[0120]This embodiment is a modification of the preceding fundamental embodiments. In the above embodiments, the phase difference is adjusted by adjusting the volume of the capacity chambers 75 and 76 of the phase controller 71, 72. Alternatively, in this embodiment, dumping characteristic is given for adjusting the phase difference to a desirable phase difference by generating air bubbles of a predetermined amount in the capacity chamber 75, 76. In this embodiment, air bubbles of a predetermined are injected into at least one capacity chamber 75, 76.

[0121]As illustrated in FIG. 13, in Step 393, the phase difference is adjusted by supplying intentionally air bubbles in the capacity chamber 75, 76. Therefore, the control part in this embodiment controls the phase difference by giving a dumping function to the phase controller 71, 72.

[0122]As illustrated in FIG. 14, the phase controller 71, 72 includes a bubble source 379 (BS) that injects air bubbles into the first capacity chamber 75...

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Abstract

A thermomagnetic cycle device includes: a magneto-caloric element; a magnetic field modulation device that modulates an external magnetic field applied to the magneto-caloric element; a heat transport device that generates a both-way flow of heat transport medium; a phase controller that adjusts a phase difference between a magnetic field phase of change in the external magnetic field generated by the magnetic field modulation device and a flow phase of the both-way flow generated by the heat transport device; and a control device that controls the phase controller. The control device includes: a phase acquisition part that acquires the flow phase of the both-way flow of the heat transport medium or a reaction phase represented by change in heat emitted or absorbed by the magneto-caloric element; and a control part that controls the phase controller based on the flow phase or the reaction phase.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is based on Japanese Patent Application No. 2016-103652 filed on May 24, 2016, Japanese Patent Application No. 2016-235322 filed on Dec. 2, 2016, and Japanese Patent Application No. 2017-79882 filed on Apr. 13, 2017, the disclosures of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to a thermomagnetic cycle device using temperature characteristics of a magnetic substance.BACKGROUND ART[0003]Patent Literatures 1-5 disclose thermomagnetic cycle devices, in each of which kinetic energy and thermal energy are mutually converted using temperature characteristics of a magnetic substance. As one thermomagnetic cycle device, a magneto-caloric effect type heat pump device (henceforth MHP device) is described. The MHP device uses change in the intensity of a magnetic field and a both-way flow of medium which transfers heat.[0004]The phase relation between the change in magnetic field a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B21/00
CPCF25B2321/0023F25B2321/0022F25B21/00Y02B30/00
Inventor NIIYAMA, YASUNORIIWAYA, KAZUKITORII, AKITONOMURA, TOMOYUKIITOU, SHUNJI
Owner DENSO CORP