JP5817655B2 - Magnetic heat pump system - Google Patents

Description

  The present invention relates to a magnetic heat pump capable of producing a low-temperature and high-temperature heat transport medium, and a magnetic heat pump capable of changing the flow rate of the heat transport medium in a circulation pipe through which the produced heat transport medium flows according to the situation. It is about the system.

  2. Description of the Related Art Conventionally, a magnetic heat pump using a phenomenon (magnetocaloric effect) in which a magnetic material generates heat when a magnetic field is applied to a certain type of magnetic material and a temperature of the magnetic material decreases when the magnetic field is removed (for example, Patent Document 1). The configuration required for the magnetic heat pump includes a magnetic heat pump body that contains the magnetocaloric effect material, a pump that moves the heat transport medium relative to the magnetocaloric effect material, and a magnetic field change in the magnetocaloric effect material within the magnetic heat pump body. Only the magnetic field applying device to be applied. In such a magnetic heat pump body, it is possible to manufacture both a high-temperature heat transport medium and a low-temperature heat transport medium. Therefore, the magnetic heat pump system including the secondary flow path for circulating the high-temperature heat transport medium and the low-temperature heat transport medium can be applied to an air conditioner such as an automobile.

  In an air conditioner using a magnetic heat pump system, a cooler unit is installed in a secondary path through which a low-temperature heat transport medium circulates, and a heater unit is installed in a secondary path through which a high-temperature heat transport medium circulates. Water or an antifreeze liquid (long life coolant: LLC) can be used as a heat transport medium that exchanges heat by passing through a container filled with a magnetocaloric effect material. In the following description, a case where the air conditioner is mounted on a vehicle (automobile) and water is used as a heat transport medium will be described.

  When the heat transport medium used for the air conditioner is water, in the engine room of the vehicle, there is a magnetic heat pump main body having a cold water production section and a hot water production section, and a piston pump which is a means for moving cold water and hot water. Is provided. The cold water manufacturing unit and the hot water manufacturing unit have a common rotating shaft driven by a motor, and a plurality of material containers in the cold water manufacturing unit and the hot water manufacturing unit are arranged radially with respect to the rotating shaft. In addition, a magnetocaloric effect material is contained in each material container in a state that allows water to pass therethrough. A material container is also called a material bed.

  As a magnetic field application device that applies a magnetic field change to the magnetocaloric effect material in the magnetic heat pump body, a permanent magnet that is attached to a rotating shaft and rotates is used. And hot water and cold water are manufactured when water passes the magnetocaloric effect material which cools or heat-generates by a magnetic field change. The piston pump is provided in a portion between the cold water production unit and the hot water production unit in the magnetic heat pump main body, and water is supplied to each material container of the cold water production unit and the hot water production unit by a piston reciprocating in the cylinder. Or sucked into the cylinder. As the piston pump, a radial piston pump in which a plurality of cylinders are arranged radially is used.

Special table 2011-505543 gazette

  However, when the magnetic heat pump system is used for the air conditioner, if the amount of cold water flowing out from the cold water production unit and the hot water production unit and the amount of hot water vary, the amount of cold water flowing through the cooler unit installed in the secondary path and the heater unit There is a risk that the amount of hot water flowing will change. And when the amount of cold water which flows through a cooler unit, and the amount of warm water which flows through a heater unit change, there existed a subject that the performance of an air harmony device fell.

  In view of the above-described problems, the present invention provides an air conditioning apparatus using a magnetic heat pump system, and the amount of cold water flowing through the cooler unit and the heater unit even if the amount of cold water flowing out from the cold water production unit and the hot water production unit varies. The magnetic heat pump system which can prevent the performance fall of an air conditioning apparatus by adjusting the amount of warm water which flows through is provided.

The present invention that solves the above problems changes the magnetic field applied to the magnetocaloric effect material (26) by the magnetic field changing means (22, 23), and flows to the magnetocaloric effect material (26) whose temperature has changed due to the change of the magnetic field. A magnetic heat pump body (40) for producing a low temperature heat transport medium and a high temperature heat transport medium from the heat transport medium;
A first circulation pipe (15) for circulating a low-temperature heat transport medium discharged from the magnetic heat pump main body (40) through the first heat exchange section (2) and then circulating to the magnetic heat pump main body (40). When,
A second circulation pipe (16) for circulating the high-temperature heat transport medium discharged from the magnetic heat pump main body (40) to the magnetic heat pump main body (40) after passing through the second heat exchange section (5). When,
In a magnetic heat pump system (30) comprising a reciprocating pump (13) for moving the heat transport medium,
Maximum displacement amount adjusting means for adjusting the maximum displacement amount of the heat transport medium per cycle of the reciprocating pump (13) is provided in each of the first and second circulation pipes (15, 16). It is characterized by that.

  As a result, when a magnetic heat pump system is used for an air conditioner, the amount of cold water flowing through the cooler unit and the amount of hot water flowing through the heater unit are adjusted even if the amount of cold water flowing out from the cold water production unit and the hot water production unit varies. It becomes possible to prevent the performance degradation of the air conditioner.

  In addition, the code | symbol attached | subjected above is an example which shows a corresponding relationship with the specific embodiment as described in embodiment mentioned later.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram in one Embodiment which mounted the magnetic heat pump system to which this invention is applied to the air conditioning apparatus for vehicles. It is a system configuration | structure figure which shows the structure of the 1st Example of this invention in the magnetic heat pump system shown in FIG. (A) is a partial cross-sectional view taken along the line AA of the magnetic heat pump system shown in FIG. 2, and (b) is an assembled perspective view showing a configuration of an example of a material container containing the magnetocaloric effect material shown in (a). (C) is a perspective view which shows an example of a structure of the rotor provided with the magnet shown to (a). It is a perspective view which shows an example of a structure of the flow control valve attached to the connection pipe line which connects the reservoir tank shown in FIG. 2 to a cold water pipe line and a hot water pipe line. It is a system block diagram which shows the structure of the 2nd Example of this invention in the magnetic heat pump system shown in FIG. It is sectional drawing which shows an example of the pressurization apparatus which pressurizes the liquid level of the heat transport medium in the reservoir tank shown in FIG. It is a characteristic view which shows the magnetocaloric effect according to the kind of the outside air temperature and magnetocaloric effect material used as the basis of the flow control at the time of starting in the magnetic heat pump system of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. Moreover, about each Example, the same code | symbol is attached | subjected to the part of the same structure, and the description is abbreviate | omitted or simplified. The present invention is a magnetic heat pump system including a cold water production unit (medium cooling unit) for producing cold water and a hot water production unit (medium heating unit) for producing hot water. In the embodiments described below, the present invention is a representative example. A magnetic heat pump system mounted on a vehicle air conditioner will be described.

  FIG. 1 shows a configuration when a magnetic heat pump system 30 using a piston pump is mounted on a vehicle air conditioner (air conditioner) 10. The air conditioner 10 is on the vehicle interior side, and a cooler unit 2 as a heat absorbing means is provided in the apparatus main body 1. Further, on the downstream side of the cooler unit 2, there are a cooling passage 3, and a heating passage 4 provided with a heater unit 5 and a heater core 6 as heat radiating means for radiating heat of water which is a heat transport medium to the outside. And the air mix damper 7 is provided in the inlet part of the cooling passage 3 and the heating passage 4, and the airflow which passed the cooler unit 2 by the movement of the air mix damper 7 is sent to the cooling passage 3, or the heating passage 4 is made into The adjustment of the flow is performed.

  On the other hand, in the engine room of the vehicle, a magnetic device provided with a cold water production unit 11 that operates by a rotating shaft 21 driven by a motor 20, a hot water production unit 12, and a piston pump 13 that is a means for moving water as a heat transport medium. There is a heat pump body 40. The piston pump 13 is a reciprocating pump and reciprocates water. The internal structure of the cold water manufacturing unit 11, the hot water manufacturing unit 12, and the piston pump 13 will be described later. The cold water production unit 11 cools water by the action of magnetism, and the water cooled by the cold water production unit 11 is discharged by a piston pump 13 to a cold water circulation pipe (first circulation pipe) 15 to be a cooler unit. After being sent to 2, it returns to the cold water production unit 11. On the contrary, the hot water production unit 12 heats water by the action of magnetism, and the water heated by the hot water production unit 12 is discharged to the hot water circulation line (second circulation line) 16 by the piston pump 13. After being sent to the heater unit 5, it returns to the hot water production unit 12.

  On the other hand, in the air conditioner 10, cooling water (coolant) heated by cooling the engine 8 is supplied to the heater core 6 provided in the heating passage 4 through the coolant circulation path 9, and together with the heater unit 5, the heating passage 4. Warm the airflow through. Since the heater core 6 is not directly related to the present invention, further description of the heater core 6 is omitted.

  Here, the configuration of the cold water circulation line 15 and the hot water circulation line 16 will be described in detail. The cold water production unit 11 has a plurality of material containers, and branch pipes 15A are connected to the material containers. The plurality of branch pipes 15 </ b> A are gathered to form a supply pipe 15 </ b> B and supply water to the cooler unit 2. The water discharged from the cooler unit 2 returns to the cold water production unit 11 through the return pipe 15C, is distributed to the branch pipes 15D connected to the material containers, and returns to the material containers. A bypass pipe (first bypass pipe) 17A that bypasses the cooler unit 2 is provided between the supply pipe 15B and the return pipe 15C. The bypass pipe 17A is directly connected to the return pipe 15C, but is connected to the supply pipe 15B via the first flow path switching valve 17.

  During heating, the first flow path switching valve 17 is switched so that the water flowing through the supply pipe 15B can return to the cold water production unit 11 via the bypass pipe 17A without passing through the cooler unit 2. Further, a third flow path switching valve 19 is provided upstream of the branch pipe 15D of the return pipe 15C, and the third flow path switching valve 19 is connected to the third return pipe 15C via the outdoor unit 14. A return detour pipe (third bypass pipe) 19A is connected. At the time of heating, the water flowing through the return pipe 15C by switching the third flow path switching valve 19 flows from the third flow path switching valve 19 to the bypass pipe 19A, and detours by absorbing heat from the outside air in the outdoor unit 14 It flows again from the pipe 19A into the return pipe 15C. The water that re-enters the return pipe 15C returns to the cold water production unit 11.

  Similarly, the hot water production unit 12 has a plurality of material containers that heat water to make warm water, and a branch pipe 16A is connected to each material container. A plurality of branch pipes 16 </ b> A are gathered to form a supply pipe 16 </ b> B and supply water to the heater unit 5. The water discharged from the heater unit 5 returns to the hot water production unit 12 through the return pipe 16C, is distributed to the branch pipes 16D connected to the material containers described above, and returns to the material containers. The return pipe 16C upstream of the branch pipe 16D has a second flow path switching valve 18, and the second flow path switching valve 18 passes through the outdoor unit 14 and returns to the return pipe 16C. 2 bypass pipe) 18A is connected. The water flowing through the return pipe 16C by the switching of the second flow path switching valve 18 flows to the bypass pipe 18A before returning to the hot water production section 12, absorbs heat from the outside air in the outdoor unit 14, and then the hot water production section. 12 can be returned.

  Next, the configuration of the magnetic heat pump system 30 of the first embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3A to 3C. Since the outdoor unit 14, the first to third flow path switching valves 17 to 19, the bypass pipe 17A and the bypass pipes 18A and 19A described in FIG. 1 are not directly related to the present invention, the illustration and description are omitted. did. Further, it is assumed that the cold water circulation pipe 15 and the hot water circulation pipe 16 connected to the discharge valves 27 and the suction valves 28 of the magnetic heat pump main body 40 are independent from each other.

  In the first embodiment, the internal structure of the magnetic heat pump main body 40 including the cold water production unit 11, the hot water production unit 12, and the radial piston pump 13 when the piston pump 13 is the radial piston pump 13 will be described. Since the structures of the cold water production unit 11 and the hot water production unit 12 attached to the radial piston pump 13 in the left-right direction are the same, the same components are denoted by the same reference numerals, and the structure of the cold water production unit 11 will be described.

  The chilled water production unit 11 shown in FIG. 2 includes a cylindrical yoke portion 24 arranged concentrically with respect to the rotary shaft 21, and the rotary shaft 21 has a configuration as shown in FIGS. 3 (a) and 3 (c). The rotor 22 having a fan-like cross section is provided so as to be opposed. A permanent magnet 23 is installed on the outer peripheral surface of the rotor 22. One of the permanent magnets 23 has an N pole on the outside, and the other has an S pole on the outside. A plurality of material containers 25 filled with a magnetocaloric effect material 26 having a magnetocaloric effect are arranged between the outer side of the rotation locus of the permanent magnet 23 and the inner peripheral surface of the yoke portion 24. The material container 25 is sometimes called a material bed. The material container 25 filled with the magnetocaloric effect material 26 circulates water.

  As shown in FIG. 3 (b), the material container 25 has a cylindrical shape with a fan-shaped cross section, and the interior space is filled with a pellet-like magnetocaloric effect material 26, and both ends are meshed. The magneto-caloric effect material 26 is confined by the end plate 25M. Water can enter the interior from one end of the material container 25 through the end plate 25M, pass through the gap between the magnetocaloric material 26, and escape from the opposite end to the outside through the end plate 25M. In this embodiment, six same-shaped material containers 25 are arranged on the inner peripheral surface of the yoke portion 24, and the permanent magnet 23 attached to the outer peripheral surface of the rotor 22 on the inner peripheral surface side of the material container 25. Will rotate. The rotor 22, the permanent magnet 23, and the yoke portion 24 function as magnetic field changing means for changing the magnitude of the magnetic field applied to the magnetocaloric effect material 26 filled in the material container 25.

  Returning to FIG. 2 and continuing the description, the case of the radial piston pump 13 is formed integrally with the cold water manufacturing section 11 and the yoke section 24 of the hot water manufacturing section 12. Therefore, the case will be described with the same reference numeral 24. In the radial piston pump 13, six cylinders 34 are provided radially with respect to the rotating shaft 21 in accordance with the number of material containers 25 in the cold water production unit 11, and pistons that reciprocate inside the cylinders 34. 33 is provided. On the other hand, a cam 32 that is eccentric with respect to the rotating shaft 21 is attached to the rotating shaft 21 that is rotated by the motor 20, and each piston 33 is engaged with the cam profile (contour) of the cam 32. In the illustrated cam 32, when the rotation shaft 21 makes one rotation, the piston 33 in each cylinder 34 reciprocates once. However, if another protrusion is provided on the opposite side of the protrusion of the cam 32, the rotation shaft 21 is rotated. Is rotated once, the piston 33 in each cylinder 34 reciprocates twice. When the cylinder 34 is provided to face the rotating shaft 21, the number of cylinders of the radial piston pump 13 is an even number.

  The side surface of each cylinder 34 far from the rotating shaft 21 is connected to the end surface of each material container 25 of the cold water production unit 11 and the hot water production unit 12 by a communication passage 38 provided in the cylinder block 36. And between the top dead center of the piston 33 of each cylinder 34 to which the communication passage 38 is connected (the point where the piston 33 has moved farthest from the rotating shaft 21) and the end of the cylinder 34, the two manufacturing parts reciprocate. It is a reservoir 35 for moving water. Further, a water jacket is provided on the outside of the cylinder 34 of the cylinder block 36, although not shown.

  In the first embodiment shown in FIG. 2, an end face plate 29 is attached to the end face of the cold water production unit 11 on the side far from the radial piston pump 13. The end face plate 29 is provided with a suction valve 28 that introduces water into the end face of each material container 25 and a discharge valve 27 that discharges water discharged from the end face of each material container 25. Each discharge valve 27 is connected to a chilled water circulation line 15, and each chilled water circulation line 15 returns to the suction valve 28 of the same material container 25 after passing through the cooler unit 2. The structure of the cold water production unit 11 has been described above. In the hot water production unit 12, the hot water circulation pipes 16 are connected to the discharge valves 27, and the hot water circulation pipes 16 pass through the heater unit 5. Return to the suction valve 28 of the same material container 25. And in the case of the radial piston pump 13, the position with respect to the rotating shaft 21 of the permanent magnet 23 in the cold water manufacturing part 11 and the hot water manufacturing part 12 has shifted | deviated 90 degree | times.

  In the first embodiment, a first reservoir tank 51 is connected to each cold water circulation pipe 15 after passing through the cooler unit 2 through a first communication pipe 61. Each of the first communication pipes 61 is provided with a first flow resistance control valve 71 that changes the flow area of the first communication pipe 61. Similarly, the second reservoir tank 52 is also connected to each hot water circulation pipe 16 after passing through the heater unit 5 through the second communication pipe 62. In addition, the second flow path resistance control valve 72 that changes the flow path area of the second communication pipeline 62 is provided in each piece of the second communication pipeline 62. The first flow path resistance control valve 71 and the second flow path resistance control valve 72 are controlled by the control device 100 to change the flow area of the first communication pipe line 61 and the second communication pipe line 62. Variable orifice.

  In the following description, the first and second reservoir tanks 51 and 52 are collectively referred to as the reservoir tank 50, and the first and second connection conduits 61 and 62 are collectively referred to as the communication conduit 60, the first The second flow resistance control valves 71 and 72 may be collectively referred to as a flow resistance control valve 70.

  FIG. 4 shows an example of the structure of the flow path resistance control valve 70 and its attachment to the connecting line 60. The flow path resistance control valve 70 includes a valve main body 73 having a flow path having the same inner diameter as that of the connecting pipe line 60, and a butterfly valve 76 provided inside the valve main body 73. The butterfly valve 76 has a rotating shaft 75, and the rotating shaft 75 passes through the valve main body 73 and is connected to a butterfly valve drive mechanism 74 attached to the upper portion of the valve main body 73. The butterfly valve drive mechanism 74 rotates the rotating shaft 75 and changes the area of the flow path inside the valve body 73 by the butterfly valve 76, and rotates the rotating shaft 75 by any one of electricity, air pressure, and hydraulic pressure. The flow path resistance control valve 70 has a valve body 73 sandwiched between the pipe flanges 60F provided in the connection pipe line 60 with a flow path therebetween, and is connected to the connection pipe line by bolts inserted into the bolt holes 60H of the pipe flange 60F. 60.

  When the area of the flow path of the connection pipe line 60 is changed by the flow path resistance control valve 70, the flow rate of water flowing through the cold water circulation pipe 15 and the hot water circulation pipe 16 changes, and the cold water circulation pipe 15 and the hot water circulation pipe 16 are changed. The same effect as changing the flow path resistance of the water flowing through is obtained. Therefore, the maximum change amount of water per cycle of the radial piston pump 13 can be controlled. In addition to the butterfly valve 76 described with reference to FIG. 4, the flow resistance control valve 70 is a valve that is controlled by any one of electricity, air pressure, and hydraulic pressure to change the flow area of the connecting pipe 60, for example, A reed valve, a needle valve, a gate valve, or the like can be used.

  Here, a situation in which the flow path resistance of the water flowing through the cold water circulation pipe 15 and the hot water circulation pipe 16 is changed using the reservoir tank 50 will be described. In the magnetic heat pump main body 40 having the structure described with reference to FIG. 2, the magnetocaloric effect material 26 is filled in the material containers 25 provided in the cold water production unit 11 and the hot water production unit 12 as described above. On the other hand, the magnetocaloric effect material 26 filled in the material container 25 is filled with different types of temperature characteristics that exhibit the magnetocaloric effect in the cold water production unit 11 and the hot water production unit 12. For example, the cold water production unit 11 is filled with three types of magnetocaloric effect materials (materials A, B, and C) having a low temperature characteristic that exhibits the magnetocaloric effect, and the hot water production unit 12 has a magnetic property. Three types of magnetocaloric effect materials (materials D, E, and F) having high temperature characteristics that exhibit a caloric effect are filled. FIG. 7 shows the magnitude of the magnetocaloric effect on the temperature of the six types of materials A, B, C, D, E, and F of the magnetocaloric effect material 26.

  Further, in the magnetic heat pump main body 40 having the structure described with reference to FIG. 2, when the piston 33 of the radial piston pump 13 goes to the top dead center, the water discharged from the cylinder 34 is divided into the cold water production unit 11 and the hot water production unit 12. Is done. During steady operation, the flow rate of the water flowing through the cold water circulation line 15 and the hot water circulation line 16 may be the same, so that the flow path resistance control valve 70 controls so that the area of the flow path of the connecting line 60 becomes the same. Just do it. At this time, the water discharged from the cylinder 34 flows into the cold water circulation line 15 and the hot water circulation line 16 at a flow rate ratio of 1: 1.

  On the other hand, when the outside air temperature is low, such as at the start of winter, the materials D, E, and F filled in the material container 25 of the hot water production unit 12 are effective for magnetic heat as shown in FIG. Out of operating range of material. Therefore, at this time, a large amount of water discharged from the cylinder 34 is allowed to flow into the cold water production unit 11 including the material container 25 filled with the materials A, B, and C in the low temperature operating region of the magnetothermal effect material. The air conditioner 10 is operated with power saving. Specifically, the flow path resistance (opening area) of the first flow path resistance control valve 71 in the first communication pipe 61 connected to the first reservoir tank 51 is decreased, and the second reservoir tank 52 The flow path resistance of the second flow path resistance control valve 72 in the second communication pipe line 62 connected to is increased. As a result, the low temperature water discharged from the cylinder 34 mainly flows to the cold water production unit 11 and does not flow much to the hot water production unit 12. Therefore, at the time of heating start in which air is heated using the heater unit 5, the opening area of the second communication pipe line 62 can be minimized by the second flow path resistance control valve 72, and the rise time of the system can be shortened.

  Conversely, when the outside air temperature is high, such as at the start of summer, the materials A, B, and C filled in the material container 25 of the cold water production unit 11 are used for magnetic heat as shown in FIG. Out of the working area of the effect material. Therefore, at this time, a large amount of water discharged from the cylinder 34 is allowed to flow to the hot water production unit 12 including the material container 25 filled with the materials D, E, and F in the high temperature operating region of the magnetothermal effect material. The air conditioner 10 is operated with power saving. Specifically, the flow resistance of the first flow resistance control valve 71 in the first communication conduit 61 connected to the first reservoir tank 51 is increased, and the first resistance connected to the second reservoir tank 52 is increased. The flow path resistance of the second flow path resistance control valve 72 in the second communication pipe line 62 is decreased. As a result, high temperature water discharged from the cylinder 34 mainly flows to the hot water production unit 12 and does not flow much to the cold water production unit 11. Therefore, at the time of cooling start using the cooler 2 to cool the air, the first flow path resistance control valve 71 can minimize the opening area of the first communication pipe 61 and shorten the system startup time.

  FIG. 5 shows the configuration of the second embodiment of the present invention in the magnetic heat pump system 30 shown in FIG. The second embodiment shown in FIG. 5 has the same configuration of the magnetic heat pump main body 40 as the first embodiment shown in FIG. Therefore, the same components are denoted by the same reference numerals, and the description thereof is omitted.

  In the second embodiment, similar to the first embodiment, each discharge valve 27 is connected to a chilled water circulation pipe 15, and each chilled water circulation pipe 15 passes through the cooler unit 2 and then the same material container 25. The intake valve 28 is returned. Further, the hot water circulation pipes 16 are respectively connected to the discharge valves 27 of the hot water production unit 12, and each hot water circulation pipe 16 returns to the suction valve 28 of the same material container 25 after passing through the heater unit 5. The point is the same.

  In the second embodiment, the first reservoir tank 51 is connected to each chilled water circulation pipe 15 after passing through the cooler unit 2 through the first communication pipe 61. Each of 61 is not provided with the first flow path resistance control valve 71. Similarly, the second reservoir tank 52 is also connected to each hot water circulation pipe 16 after passing through the heater unit 5 through the second communication pipe 62. Is not provided with the second flow path resistance control valve 72.

  On the other hand, in the second embodiment, an air tank 80 for storing high-pressure compressed air is provided, and the compressed air in the air tank 80 is supplied to the first and second reservoirs through the first and second air pipes 81 and 82. The tanks 51 and 52 are connected to the ceiling portions 51C and 52C. Then, in the middle of the first air pipe 81, the amount of compressed air supplied from the air tank 80 into the first reservoir tank 51 is changed to change the pressure of the air reservoir 51 </ b> A in the reservoir tank 51. The pressure regulating valve 91 is provided. Similarly, in the middle of the second air pipe 82, the amount of compressed air supplied from the air tank 80 into the second reservoir tank 52 is changed to change the pressure of the air reservoir 52A in the reservoir tank 52. Two pressure regulating valves 92 are provided.

  The pressure regulating valves 91 and 92 are operated by an electric signal from the control device 100. If the pressure of the air pool 51A in the reservoir tank 51 is increased by the control of the pressure regulating valve 91, the flow rate of the water flowing through the cold water circulation pipe 15 is reduced, and if the pressure of the air pool 51A in the reservoir tank 51 is decreased, The flow rate of water flowing through the cold water circulation line 15 increases. Similarly, if the pressure of the air pool 52A in the reservoir tank 52 is increased by the control of the pressure regulating valve 92, the flow rate of water flowing through the hot water circulation line 16 is decreased, and if the pressure of the air pool 52A in the reservoir tank 52 is decreased. The flow rate of water flowing through the hot water circulation conduit 16 increases.

  Also in the second embodiment, during steady operation, the flow rate of water flowing through the cold water circulation line 15 and the hot water circulation line 16 may be the same. What is necessary is just to control so that the pressure of 51A and 52A may become the same. At this time, the water discharged from the cylinder 34 flows into the cold water circulation line 15 and the hot water circulation line 16 at a flow rate ratio of 1: 1.

  On the other hand, when the outside air temperature is low, such as at the start of winter, the materials D, E, and F filled in the material container 25 of the hot water production unit 12 are effective for magnetic heat as shown in FIG. Out of operating range of material. Therefore, at this time, a large amount of water discharged from the cylinder 34 is allowed to flow into the cold water production unit 11 including the material container 25 filled with the materials A, B, and C in the low temperature operating region of the magnetothermal effect material. The air conditioner 10 is operated with power saving. Specifically, the first and second pressure regulating valves 91 and 92 are controlled to reduce the pressure of the air reservoir 51A of the first reservoir tank 51, and to reduce the pressure of the air reservoir 52A of the second reservoir tank 52. Increase. As a result, the low temperature water discharged from the cylinder 34 mainly flows to the cold water production unit 11 and does not flow much to the hot water production unit 12. Therefore, at the time of heating start using the heater unit 5 to heat the air, the pressure of the air reservoir 52A of the second reservoir tank 52 can be maximized by the second pressure regulating valve 92, and the rise time of the system can be shortened.

  Conversely, when the outside air temperature is high, such as at the start of summer, the materials A, B, and C filled in the material container 25 of the cold water production unit 11 are used for magnetic heat as shown in FIG. Out of the working area of the effect material. Therefore, at this time, a large amount of water discharged from the cylinder 34 is allowed to flow to the hot water production unit 12 including the material container 25 filled with the materials D, E, and F in the high temperature operating region of the magnetothermal effect material. The air conditioner 10 is operated with power saving. Specifically, the first and second pressure regulating valves 91 and 92 are controlled to increase the pressure of the air reservoir 51A of the first reservoir tank 51, and the pressure of the air reservoir 52A of the second reservoir tank 52 is increased. Decrease. As a result, high temperature water discharged from the cylinder 34 mainly flows to the hot water production unit 12 and does not flow much to the cold water production unit 11. Therefore, at the time of cooling start using the cooler 2 to cool the air, the pressure of the air reservoir 51A of the first reservoir tank 51 can be maximized by the first pressure regulating valve 91, and the system startup time can be shortened.

  In the second embodiment, the compressed air in the air tank 80 and the pressures of the air reservoirs 51A and 52A of the first and second reservoir tanks 51 and 52 are controlled by controlling the first and second pressure regulating valves 91 and 92. Was adjusting. On the other hand, it is possible to adjust the pressure of the air reservoirs 51A and 52A of the first and second reservoir tanks 51 and 52 without using the compressed air in the air tank 80. FIG. 6 shows a modification of the second embodiment of the present invention, and is a cross-sectional view showing an example of a pressure control device 90 that pressurizes the water level in the reservoir tank shown in FIG.

  The pressure control device 90 is attached to the first and second reservoir tanks 51 and 52, and FIG. 6 shows the first reservoir tank 51. Between the ceiling 51C of the first reservoir tank 51 and the liquid level W, an up / down valve 96 that moves up and down in the air reservoir 51A in an airtight state by an O-ring 97 is provided. The elevating valve 96 has a female threaded portion 95 on the ceiling 51 </ b> C side, and a rotating shaft 94 formed with a male screw that is rotated by a motor 93 is screwed into the female threaded portion 95. The motor 93 is rotated by an input control signal, and the lift valve 96 is moved up and down by the rotating shaft 94 and the female screw portion 95. When the lift valve 96 approaches the liquid level W, the pressure in the air reservoir 51A increases, and when it moves away from the liquid level W, the pressure in the air reservoir 51A decreases. The elevating valve 96 can be moved up and down by air pressure or hydraulic pressure.

  The magnetic heat pump system of the present invention described above can be effectively applied as long as it is a magnetic heat pump system that circulates cold water and hot water, in addition to the air conditioner of an automobile. The piston pump used in the magnetic heat pump system is not limited to the radial piston pump, and a swash plate type axial piston pump or the like can also be used.

11 Cold Water Production Department 12 Hot Water Production Department 13 Radial Piston Pump (Piston Pump)
15 Cold water circulation pipeline (first circulation pipeline)
16 Hot water circulation line (second circulation line)
40 Magnetic heat pump main body 51, 52 Reservoir tank 60, 61, 62 Connecting pipe 70, 71, 72 Flow resistance control valve 80 Air tank 91, 92 Pressure regulating valve 90 Pressure control valve

Claims (14)

The magnetic field applied to the magnetocaloric effect material (26) is changed by the magnetic field changing means (22, 23), and the low temperature heat transport medium flows from the heat transport medium flowing in the magnetocaloric effect material (26) whose temperature has changed due to the change of the magnetic field. And a magnetic heat pump body (40) for producing a high-temperature heat transport medium,
A first circulation pipe (15) for circulating a low-temperature heat transport medium discharged from the magnetic heat pump main body (40) through the first heat exchange section (2) and then circulating to the magnetic heat pump main body (40). When,
A second circulation pipe (16) for circulating the high-temperature heat transport medium discharged from the magnetic heat pump main body (40) to the magnetic heat pump main body (40) after passing through the second heat exchange section (5). When,
In a magnetic heat pump system (30) comprising a reciprocating pump (13) for moving the heat transport medium,
Maximum displacement amount adjusting means for adjusting the maximum displacement amount of the heat transport medium per cycle of the reciprocating pump (13) is provided in each of the first and second circulation pipes (15, 16). Magnetic heat pump system characterized by that.   The maximum displacement amount adjusting means includes first and second reservoir tanks (51, 52) connected to each of the first and second circulation pipes (15, 16). The magnetic heat pump system according to 1.   The maximum displacement adjusting means connects the first and second reservoir tanks (51, 52) and the first and second reservoir tanks (51, 52) to each of the first and second circulation pipes (15, 16). The magnetic heat pump system according to claim 2, further comprising first and second flow path resistance control valves (71, 72) for controlling the flow path resistance of the connecting pipe lines (61, 62).   The maximum displacement adjustment means controls the pressure applied to the liquid level (W) of the heat transport medium in the first and second reservoir tanks (51, 52) (80, 91, 82, 90). The magnetic heat pump system according to claim 2, wherein the magnetic heat pump system is 82, 90). The first and second flow path resistance control valves (71, 72) are first and second variable orifices (71, 72) for changing the opening area of the communication pipe line,
When the flow rate of the heat transport medium in the first and second circulation pipes (15, 16) is increased, the first and second variable orifices (71, 72) are used to connect the first and second communication channels. Increase the opening area of the pipeline (61, 62),
When the flow rate of the heat transport medium in the first and second circulation pipes (15, 16) is reduced, the first and second variable orifices (71, 72) are used to connect the first and second communication channels. The magnetic heat pump system according to claim 3, wherein the opening area of the pipe (61, 62) is narrowed. At the time of cooling start in which air is cooled using the first heat exchange section (2), the opening area of the first communication pipe line (61) is minimized by the first variable orifices (71, 72),
At the time of heating start using the second heat exchange section (5) to heat the air, the second variable orifice (72) minimizes the opening area of the second communication pipe line,
6. The magnetic heat pump system according to claim 5, wherein a rise time of the system is shortened.   The magnetic heat pump system according to claim 5 or 6, wherein the first and second variable orifices (71, 72) are operated by an electric signal.   The magnetic heat pump system according to claim 5 or 6, wherein the first and second variable orifices (71, 72) are operated by pressure of fluid or gas. The pressure control means (91, 82) controls the compressed air introduced into the ceiling (51C, 52C) of the first and second reservoir tanks from the compressed air source (80) through the air pipes (81, 82). 92),
When increasing the flow rate of the heat transport medium in the first and second circulation pipes (15, 16), the pressure regulating valve (91, 92) causes the heat transport medium of the reservoir tank (51, 52) to flow. Reduce the pressure applied to the liquid level (W),
When the flow rate of the heat transport medium in the first and second circulation pipes (15, 16) is reduced, the pressure regulating valve (91, 92) causes the heat transport medium in the reservoir tank (51, 52) to flow. The magnetic heat pump system according to claim 4 , wherein the pressure applied to the liquid level (W) is increased. The pressure control means is a lift valve (96) for changing the volume of the air reservoir (51A, 52A) in the reservoir tank (51, 52),
When increasing the flow rate of the heat transport medium in the first and second circulation pipes (15, 16), the lift valve (96) is moved away from the liquid surface (W) and the reservoir tanks (51, 52). ) To lower the pressure applied to the liquid level (W) of the heat transport medium,
When the flow rate of the heat transport medium in the first and second circulation pipes (15, 16) is reduced, the lift valve (96) is brought close to the liquid level (W) and the reservoir tanks (51, 52). The magnetic heat pump system according to claim 4 , wherein the pressure applied to the liquid level (W) of the heat transport medium is increased. At the time of cooling start in which air is cooled using the first heat exchange unit (2), the pressure applied to the liquid level (W) of the heat transport medium of the first reservoir tank (51) is maximized. ,
In the heating start to heat the air using the second heat exchanger (5), the pressure applied to the liquid surface of the heat transport medium (W) of the second reservoir tank (52) to maximize ,
The magnetic heat pump system according to claim 9 or 10 , wherein the rise time of the system is shortened. Wherein the steady operation of the magnetic heat pump system (30), flow ratio of the first circulation pipeline (15) and said second of said heat transfer medium flowing through the circulation line (16) is 1: 1 Thus, the first and second flow path resistance control valves (71, 72) adjust the flow path resistance of the first and second connecting pipe lines (61, 62). 3. A magnetic heat pump system according to 3. Wherein the steady operation of the magnetic heat pump system (30), flow ratio of the first circulation pipeline (15) and said second of said heat transfer medium flowing through the circulation line (16) is 1: 1 Thus, the pressure control means controls the pressure applied to the liquid level (W) of the heat transport medium in the first and second reservoir tanks (51, 52). 4. The magnetic heat pump system according to 4. The reciprocating pump (13) is a radial piston pump;
The radial piston pump is provided in a portion of the magnetic heat pump body (40) between a portion for producing a low-temperature heat transport medium and a portion for producing a high-temperature heat transport medium. Item 14. The magnetic heat pump system according to any one of Items 1 to 13.

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