JP2010110191A - Heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an efficient heat pump using a magnetic fluid by selecting a magnetic fluid to be used to improve efficiency of a device even in a drive unit with a magnetic fluid as a working material. <P>SOLUTION: The heat pump uses a magnetic fluid, and the magnetic fluid has a straight-chain molecular structure in which magnetic atoms are disposed at both ends. Properties of magnetic materials are utilized for division into two states, where magnetic fields are applied and are not applied, thus achieving an efficient heat pump having a heat exchange function for alternately emitting and absorbing heat. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat pump, and more particularly to a heat pump using a magnetic fluid.

  FIG. 4 is a schematic diagram showing an example of a conventional driving device using a magnetic fluid. In FIG. 4, the driving device includes a magnetic fluid 1 as a working substance to be filled, a gap portion 2, a pipe 3, a driven portion 4, a magnetic field device 5, a cooling portion 6, and a heating portion 7. Has been.

  The magnetic field device 5 is disposed between the cooling unit 6 and the heating unit 7, and different magnetic poles (N, S) are disposed in parallel with the pipe 3, and are parallel to or close to the flow direction of the magnetic fluid 1 in the pipe 3. The magnetic field is formed. The pipe 3 is filled with a magnetic fluid 1 and a loop is formed so that a gap 2 is formed. The pipe 3 is provided with a cooling unit 6 and a heating unit 7 for heating and cooling the magnetic fluid 1 at a required position of the loop.

  The magnetic fluid 1 flows from the low temperature side to the high temperature side in the pipe 3 as shown by the arrows in FIG. 4 by making the magnetic field direction of the magnetic field device 5 the same as the flow direction of the magnetic fluid 1. The turbine of the driven part 4 is rotated by the force generated by this flow, and is taken out as kinetic energy.

  The positional relationship between the cooling unit 6, the heating unit 7, and the magnetic field device 5 is that the magnetic field is the strongest at the center of both magnets in the manner in which the magnetic field is applied in parallel with the pipe 3, so The left side in FIG. 4 is cooled, and the downstream portion (right side in FIG. 4) is heated.

  And the cooling part 6 and the heating part 7 are arrange | positioned so that a low temperature cooling area and a high temperature heating area may be formed in this magnetic field.

  Patent Document 1 relates to a heat engine using a magnetic fluid as a working substance.

Japanese Patent Laid-Open No. 1-12852

  However, although the conventional drive device shown in FIG. 4 is a drive device using a magnetic fluid as a working substance, it has not been studied to improve the efficiency of the device by selecting the magnetic fluid to be used.

  The present invention pays attention to such problems, and an object thereof is to provide a heat pump capable of obtaining high efficiency.

In order to achieve the above object, claim 1 of the present invention provides:
A heat pump using magnetic fluid,
The magnetic fluid has a linear molecular structure in which magnetic atoms are arranged at both ends.

In Claim 2, in the heat pump of Claim 1,
The magnetic atom has a structure in which a benzene ring is bonded.

In Claim 3, in the heat pump of Claim 1 or 2,
The magnetic fluid undergoes a magnetic phase transition.

In Claim 4, in the heat pump in any one of Claim 1 to 3,
The heat pump
A pipe through which the magnetic fluid circulates, a heating unit and a cooling unit provided in the pipe at intervals, a magnetic field application unit provided on both sides of the pipe, and a driven unit provided in the pipe And
A magnetic field in a direction parallel to or close to the flow direction of the magnetic fluid in the pipe is formed.

  As a result, a highly efficient heat pump using magnetic fluid can be realized.

  Hereinafter, the heat pump of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a heat pump showing an embodiment of the present invention.

  The heat pump is provided with a pipe 3 through which the magnetic fluid 1 used as a refrigerant circulates, a heating unit 7 and a cooling unit 6 provided in the pipe 3 at intervals, and a permanent magnetic field provided on both sides of the pipe 3, for example. A magnetic field applying unit 10 for driving and a driven unit 4 provided in the pipe 3 are provided. A magnetic field in a direction parallel to or close to the flow direction of the magnetic fluid 1 in the pipe 3 is formed.

  A driven unit 4 driven by the moving magnetic fluid 1 is provided between the cooling unit 6 and the heating unit 7, and the driven unit 4 is a heat source serving as a driving source or a power source for the outside. Used as a drive system.

  2A and 2B are explanatory views of the magnetic moment 12 of the magnetic fluid 1 used in the present invention, and FIGS. 3A and 3B are configuration diagrams showing specific examples of the magnetic fluid 1 used in the present invention. is there.

  As shown in FIG. 2A, the magnetic moment 12 (also referred to as spin) of the magnetic fluid 1 is uneven in the absence of a magnetic field, but when a magnetic field is applied as shown in FIG. It shows that the magnetic moments 12 are aligned in a certain direction. In each transition to the two states, the transition to the state without a magnetic field is a direction in which the directions of the magnetic moments 12 are not aligned as shown in FIG. 2A, so that entropy increases and absorbs heat from the surroundings. To lower the ambient temperature. On the other hand, the transition to a state with a magnetic field is a transition in a direction in which the directions of the magnetic moments 12 are aligned as shown in FIG. 2B, so that entropy is reduced and the ambient temperature is released by releasing heat to the surroundings. To raise.

  Next, FIG. 3A shows an example of a structure in which the magnetic fluid 1 has, for example, a magnetic substance atom or compound in a side chain, and no nonmagnetic substance atoms are sandwiched between the magnetic fluids 1. Is a structural example in which the magnetic fluid 1 has, for example, a magnetic atom or compound in a side chain and is sandwiched between non-magnetic atoms between the magnetic fluid 1. 3 (a) and 3 (b), thermal vibration is performed regardless of whether a magnetic field is present, (a) is when no magnetic field is applied, and (b) is when a magnetic field is applied. .

  FIG. 3A shows that when a thermally vibrating molecule is placed in a magnetic field, no magnetic field is applied, so that a magnetic moment 12 that is magnetic, that is, spin is generated by the magnetic field application unit 10 on both sides of the pipe 3. It does not align with the direction of the magnetic field, and thermal vibration is not constrained. Since thermal vibration is not constrained in this way, entropy increases and heat is absorbed inside. That is, the thermal energy is absorbed by the thermal vibration strengthened by not being bound.

  On the other hand, in FIG. 3B as well, as shown in FIG. 3A, when a molecule that is thermally oscillating is placed in a magnetic field, a magnetic field is applied. The magnetic moment 12, i.e., the spins are aligned in the direction of the magnetic field, and thermal vibration is constrained. By constraining thermal vibration, entropy is reduced and heat is released to the outside. In other words, since the thermal vibration that has been bound and weakened is released to the outside as thermal energy, the amplitude is smaller than that in FIG.

  In FIG. 3, when the magnetic moment 12 is M and the magnetic field is H, the potential energy E increases by | ΔE | (| E | = | М · H |). In order to efficiently release this energy as heat, a magnetic material is provided on both sides of the pipe 3. Thereby, the change by the presence or absence of the magnetic field of a thermal oscillation can be enlarged.

  In the present invention, in order to increase the efficiency of heat exchange, the magnetic fluid 1 is devised and magnetic atoms (particles) are added chemically to produce magnetic molecules.

  Here, the structure of the magnetic molecule may be a linear molecular structure.

  The magnetic fluid 1 is preferably composed of particles as fine as possible (for example, 1 to 20 nm). In order to obtain as large a thermal vibration as possible, magnetic atoms having a linear molecular structure in which the magnetic atoms 11 are arranged at both ends are used. 11 is desirable.

  The magnetic atom 11 may have a structure in which a benzene ring or the like is bonded. By using the magnetic atoms 11 having these structures, a larger magnetic moment can be obtained and a large thermal vibration can be obtained.

  The magnetic fluid 1 is a magnetic colloid solution composed of ferromagnetic fine particles having a diameter of about 10 nm, such as magnetite and manganese zinc ferrite, a surfactant covering the surface, and a base liquid (water or oil). In order to use the magnetic fluid 1 as a magnetic colloid solution, a benzene ring is bonded to the side chain so that the magnetic atoms 11 are stably dispersed in the liquid.

  Further, the magnetic fluid 1 in which the solid magnetism undergoes a phase transition from paramagnetism to ferromagnetism or antiferromagnetism, or conversely from ferromagnetism or antiferromagnetism to paramagnetism, that is, a magnetic phase transition, in response to changes in temperature May be used. A substance that undergoes phase transformation such that the specific heat changes greatly when a magnetic field is applied may be used.

  Furthermore, a plurality of magnetic field application units 10 may be provided.

  As described above, according to the present invention, the heat exchange function that alternately releases and absorbs heat by dividing the state into two states of applying a magnetic field and not applying a magnetic field using the properties of the magnetic material. A highly efficient heat pump having the above can be realized.

It is a block diagram of the heat pump which shows one Example of this invention. It is explanatory drawing which shows the specific example of the magnetic moment of the magnetic fluid used by this invention. It is a block diagram which shows the specific example of the magnetic fluid of this invention. It is a schematic diagram which shows an example of the conventional heat pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic fluid 2 Cavity part 3 Pipe 4 Driven part 5 Magnetic field apparatus 6 Cooling part 7 Heating part 10 Magnetic field application part 11 Magnetic atom 12 Magnetic moment

Claims (4)

A heat pump using magnetic fluid,
The heat pump according to claim 1, wherein the magnetic fluid has a linear molecular structure in which magnetic atoms are arranged at both ends.   The heat pump according to claim 1, wherein the magnetic atom has a structure in which a benzene ring is bonded.   The heat pump according to claim 1, wherein the magnetic fluid undergoes a magnetic phase transition. The heat pump
A pipe through which the magnetic fluid circulates, a heating unit and a cooling unit provided in the pipe at intervals, a magnetic field application unit provided on both sides of the pipe, and a driven unit provided in the pipe And
The heat pump according to any one of claims 1 to 3, wherein a magnetic field in a direction parallel to or close to a flow direction of the magnetic fluid in the pipe is formed.

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