Variable-frequency electromagnetic continuous temperature adjusting system and temperature adjusting method thereof

Abstract

According to the variable-frequency electromagnetic continuous temperature adjusting system and the temperature adjusting method thereof, the temperature of the system is adjusted in real time through a heat exchange medium and magnetic field intensity, so that the working temperature of a magnetocaloric material is kept near the Curie temperature, and therefore the efficiency of the system is maximized. Positive / negative connection between the electromagnetic coil and the magnetic field power supply is switched, so that a positive / negative magnetic field is generated in the magnetic effect chamber, and continuous heat release / absorption of the magnetocaloric material is realized; when the two-position three-way valve is in left-position communication, the magnetic effect chamber, the low-temperature heat exchanger, the two-position three-way valve and the two-way variable pump are communicated to form a low-temperature loop; when the two-position three-way valve is in right-position communication, the magnetic effect chamber, the high-temperature heat exchanger, the environment-temperature heat exchanger, the two-position three-way valve and the two-way variable pump are communicated to form a high-temperature loop; continuous temperature adjustment of the system is achieved by controlling continuous or alternate circulation of the low-temperature loop and the high-temperature loop. The invention is suitable for the technical field of electromagnetic refrigeration.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic refrigeration, and in particular to a variable frequency electromagnetic continuous temperature regulation system and a temperature regulation method thereof. Background Art

[0002] Refrigeration is an indispensable thing in people's daily life, from the preservation of fruits, vegetables, and meat, to the use of air conditioners, to the medical organ refrigeration, nuclear magnetic resonance imaging, liquid hydrogen production, and liquid nitrogen production all require refrigeration. Refrigeration equipment in the prior art usually requires the use of refrigerants or heat exchange media to flow between the evaporator and the condenser to achieve heat transfer and achieve the required refrigeration effect. Due to the presence of refrigerants, refrigeration equipment using this structure requires multiple heat transfers during the refrigeration process, and the heat transfer efficiency is less than 1, making it difficult to further improve the energy efficiency of the refrigeration equipment; and the gas refrigerants used will destroy the atmospheric ozone layer, causing a greenhouse effect, and the direct emission of strong greenhouse gases threatens the ecological environment on which human beings depend for survival. Therefore, the innovative development of low-carbon technology and high-efficiency technology is an effective way to explore pollution-free and environmentally friendly refrigeration, and the development of new low-energy and high-efficiency refrigeration technologies has become an urgent task.

[0003] Room temperature magnetic refrigerators are usually composed of a magnetic field system, a regenerator, a heat exchanger, a heat exchange fluid and a driver, among which the regenerator is one of the key components of a room temperature magnetic refrigerator. Room temperature magnetic refrigerators usually use active regenerative heat recovery (AMR) technology to achieve refrigeration. This technology requires the heat exchange fluid to flow through the regenerator filled with magnetic refrigeration materials in a forward and reverse direction when it is magnetized and demagnetized, respectively, so as to form a certain temperature gradient in the magnetic refrigerant inside the regenerator, so that a high temperature end and a low temperature end are formed at both ends of the regenerator, and a large temperature difference is formed at both ends. At the same time, a large temperature difference is also formed at both ends of the heat exchange fluid, so that refrigeration can be achieved. Through the periodic magnetization and demagnetization of the regenerator by the magnetic field and the reciprocating flow of the heat exchange fluid, a temperature gradient is formed inside the regenerator, and a high temperature end and a low temperature end are formed at both ends of the regenerator, so as to achieve refrigeration. The optimal working temperature of magnetocaloric material is called Curie temperature, that is, the closer the working environment temperature is to the Curie temperature, the greater the magnetocaloric effect is. Since the working environment temperature of the electromagnetic refrigeration system is not constant, the Curie temperature of the actual magnetocaloric material will shift, seriously affecting the final refrigeration effect. At the same time, the four stages of the system's operation cannot overlap, resulting in a small heat exchange capacity and low refrigeration efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a variable frequency electromagnetic continuous temperature regulation system and a temperature regulation method thereof, which can adjust the system temperature in real time through heat exchange medium and magnetic field strength so that the working temperature of the magnetocaloric material is maintained near the Curie temperature, thereby maximizing the system efficiency.

[0005] The technical solution adopted by the present invention is: the present invention includes a magnetic effect chamber, the magnetic effect chamber is filled with several layers of magnetocaloric material, an electromagnetic coil connected to a magnetic field power supply is wound outside the magnetic effect chamber, and a positive / reverse magnetic field is generated in the magnetic effect chamber by switching the positive / reverse connection between the electromagnetic coil and the magnetic field power supply, so as to realize the heat release / absorption of the magnetocaloric material; it also includes a low-temperature heat exchanger, a high-temperature heat exchanger, a two-way variable pump, a ring temperature heat exchanger and a two-position three-way valve, when the two-position three-way valve is in the left position, the magnetic effect chamber, the low-temperature heat exchanger, the two-position three-way valve and the two-way variable pump are connected to form a low-temperature circuit; when the two-position three-way valve is in the right position, the magnetic effect chamber, the high-temperature heat exchanger, the ring temperature heat exchanger, the two-position three-way valve and the two-way variable pump are connected to form a high-temperature circuit; by controlling the continuous or alternating flow of the low-temperature circuit and the high-temperature circuit, continuous temperature regulation of the system is realized.

[0006] Furthermore, at least two groups of regenerator brackets are arranged in the magnetic effect chamber, and several layers of porous regenerators are arranged in a radial array from the axis of the regenerator bracket outward, and the positions of two adjacent layers of the porous regenerators are staggered. Each layer of the porous regenerator is filled with the magnetocaloric material with different Curie temperatures. Several through holes are randomly arranged on the regenerator bracket, and several heat exchange holes are opened on the porous regenerator, and the aperture of the heat exchange hole is smaller than the particle size of the magnetocaloric material.

[0007] Furthermore, a number of limit blocks matching the heat exchanger bracket are provided on the outer peripheral surface of the porous heat exchanger, and a special-shaped mounting hole for mounting the porous heat exchanger is provided in the heat exchanger bracket. When the porous heat exchanger is fully inserted into the special-shaped mounting hole, the positions of the two groups of limit blocks are simultaneously located on the inner sides of the two groups of heat exchanger brackets. When the porous heat exchanger is rotated, the limit blocks and the special-shaped mounting holes are staggered with each other, and are fixed to the heat exchanger brackets at the corresponding positions.

[0008] Furthermore, the outer peripheral wall of the magnetic effect chamber is covered with an insulating layer, the electromagnetic coil is wound on the outside of the insulating layer, and the left and right ends of the magnetic effect chamber are respectively provided with a first end cover and a second end cover, wherein the first end cover is connected to the low-temperature heat exchanger through a first valve, and the second end cover is connected to the high-temperature heat exchanger through a second valve.

[0009] Furthermore, a first temperature sensor is arranged on the inner side surface of the first end cover, a pressure sensor is arranged on the inner side surface of the second end cover, a second temperature sensor is arranged in the ambient temperature heat exchanger, and a third temperature sensor and a fourth temperature sensor are arranged at the outlet ends of the low-temperature heat exchanger and the high-temperature heat exchanger, respectively.

[0010] Furthermore, a third valve for draining liquid is provided at the bottom of the ambient temperature heat exchanger, and the first valve, the second valve, the third valve and the two-position three-way valve are all solenoid valves.

[0011] Furthermore, an overflow valve is also provided on the connecting pipeline between the bidirectional variable pump and the magnetic effect chamber. The ambient temperature heat exchanger adopts an open structure design. The bidirectional variable pump, the two-position three-way valve and the overflow valve are all arranged in the ambient temperature heat exchanger.

[0012] Furthermore, exhaust equipment is provided at positions corresponding to the low-temperature circuit and the high-temperature circuit, and the exhaust equipment is a blower or a fan.

[0013] The invention also discloses a method for temperature regulation using a variable frequency electromagnetic continuous temperature regulation system.

[0014] S1, continuous refrigeration,

[0015] a. Turn on the system power supply, open the first valve, switch the two-position three-way valve to the right-position phase-connected state, switch the two-way variable pump to the forward working state, and draw the heat exchange fluid from the ambient temperature heat exchanger to fill the low-temperature circuit;

[0016] b. Close the first valve, connect the magnetic field power supply in the forward direction, the electromagnetic coil generates a forward magnetic field, the magnetocaloric material is magnetized and releases heat, and the temperature of the heat exchange fluid in the magnetic effect chamber rises;

[0017] c. Cut off the magnetic field power supply, open the second valve, and the high-temperature heat exchange fluid flows from the magnetic effect chamber into the high-temperature heat exchanger. The temperature of the high-temperature heat exchanger rises, and the high-temperature circuit is filled with heat exchange fluid;

[0018] d. Close the second valve, reversely connect the magnetic field power supply, the electromagnetic coil generates a reverse magnetic field, the magnetocaloric material demagnetizes and absorbs heat, the temperature of the heat exchange fluid in the magnetic effect chamber drops, open the first valve, the two-position three-way valve switches to the left-position phase-connected state, under the action of the two-way variable pump, the low-temperature heat exchange fluid flows from the magnetic effect chamber into the low-temperature heat exchanger, the temperature of the low-temperature heat exchanger drops, the low-temperature circuit is filled with heat exchange fluid, close the first valve, and the system is cooled;

[0019] e. The magnetic field power supply is turned on in the forward direction, the electromagnetic coil generates a forward magnetic field, the temperature of the heat exchange fluid in the magnetic effect chamber rises, the magnetic field power supply is cut off, the second valve is opened, the two-position three-way valve is switched to the right position phase connection state, the two-way variable pump works in the forward direction, the high-temperature heat exchange fluid flows into and fills the high-temperature circuit, and the second valve is closed;

[0020] f. Open the low-temperature circuit in the next refrigeration cycle and repeat the steps b, c, d and e to achieve continuous refrigeration;

[0021] S2: Continuous heating

[0022] g. The first valve and the second valve are in an open state, the two-position three-way valve is in a right-positioned state, the two-way variable pump is in a forward working state, and the heat exchange fluid flows into and fills the entire system loop;

[0023] h. Close the second valve and connect the magnetic field power supply in the forward direction. The electromagnetic coil is energized to generate a magnetic field in the forward direction. The magnetocaloric material is magnetized to release heat, and the heat exchange fluid in the magnetic effect chamber is heated;

[0024] i. Cut off the magnetic field power supply, open the second valve, the two-way variable pump works in reverse, the two-position three-way valve is switched to the left-position phase-connected state, and under the action of the two-way variable pump, the high-temperature heat exchange fluid flows from the magnetic effect chamber into the low-temperature heat exchanger and fills the low-temperature circuit, the temperature of the low-temperature heat exchanger rises, close the first valve and the second valve, and the system heats;

[0025] j. The magnetic field power supply is reversely connected, the electromagnetic coil generates a reverse magnetic field, the magnetocaloric material demagnetizes and absorbs heat, the temperature of the heat exchange fluid in the magnetic effect chamber drops, the second valve is opened, the two-way variable pump is switched to a forward working state, the two-position three-way valve is switched to a right-position phase-connected state, and under the action of the two-way variable pump, the low-temperature heat exchange fluid flows into the high-temperature heat exchanger and absorbs the ambient temperature, and the high-temperature circuit is filled with the heat exchange fluid;

[0026] k. Close the second valve, connect the magnetic field power supply in the forward direction, the electromagnetic coil generates a forward magnetic field, the magnetocaloric material is magnetized and releases heat, open the first valve, the two-position three-way valve switches to the left-position phase-connected state, the high-temperature heat exchange fluid flows from the magnetic effect chamber into the low-temperature heat exchanger, the low-temperature circuit is filled with heat exchange fluid, and the first valve is closed;

[0027] l. In the next heating cycle, the high temperature circuit is opened and the steps h, i, j and k are repeated to achieve continuous heating;

[0028] S3. When performing constant temperature adjustment, adjust the width and frequency of the pulse signal of the magnetic field power supply 3, change the strength of the magnetic field generated by the electromagnetic coil, adjust the heat released / absorbed by the magnetocaloric material, control the working states of the two-way variable pump, the two-position three-way valve, the first valve and the second valve, manipulate the on / off states of the low-temperature circuit and the high-temperature circuit, thereby controlling the system to alternately operate cooling and heating, and achieve constant temperature control of the working environment.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: in the electromagnetic refrigeration system, the present invention divides the internal circuit of the electromagnetic refrigeration system into a low-temperature circuit and a high-temperature circuit through the mutual linkage between the temperature-circulating heat exchanger, the two-way variable pump and the two-position three-way valve, and realizes the instantaneous alternation of the magnetic field direction of the magnetocaloric material by cooperating with the positive and negative connection of the magnetic field power supply, and the magnetization and demagnetization frequency can be adjusted in real time. In addition, the magnetocaloric material can switch between the exothermic and endothermic states, so that the entire system can realize continuous or alternating cooling and heating, which greatly improves the working efficiency of the refrigeration system; at the same time, through the cooperation between the pressure sensor and the two-way variable pump, the flow rate of the heat exchange fluid in the temperature-circulating circuit can be adjusted in real time, so that the temperature of the heat exchange fluid in the temperature-circulating heat exchanger can be controlled in a temperature range matching the Curie temperature of the magnetocaloric material, so that the energy of the entire system is always at the optimal working temperature, which greatly improves the magnetocaloric effect of the magnetocaloric material. Therefore, the present invention adjusts the system temperature in real time through the heat exchange medium and the magnetic field strength, so that the working temperature of the magnetocaloric material is kept near the Curie temperature, thereby maximizing the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 is a schematic diagram of the structure of the low temperature circuit;

[0032] Figure 3 is a schematic structural diagram of the high temperature circuit;

[0033] Figure 4 is a schematic diagram of the cross-sectional structure of the heat regenerator bracket from a top view;

[0034] Figure 5 is a schematic structural diagram of the porous regenerator;

[0035] Figure 6 is an assembly schematic diagram of the porous heat regenerator being placed in the heterogeneous mounting hole in an unlocked state;

[0036] Figure 7 is an assembly schematic diagram of the porous heat regenerator being placed in the special-shaped mounting hole in a screwed-in fixed state;

[0037] Figure 8 It is a side structural schematic diagram of the heat regenerator bracket. DETAILED DESCRIPTION

[0038] like Figures 1 to 8As shown, the present invention includes a magnetic effect chamber 1, in which at least two groups of regenerator brackets 10 are arranged, and in the regenerator bracket 10, a plurality of layers of porous regenerators 11 are arranged in a radial array from the axis thereof to the outside, and the positions of two adjacent layers of the porous regenerators 11 are staggered, and each layer of the porous regenerator 11 is filled with the magnetocaloric material 2 with different Curie temperatures, and a plurality of through holes 12 are randomly arranged on the regenerator bracket 10, and a plurality of heat exchange holes 13 are opened on the porous regenerator 11, and the aperture of the heat exchange hole 13 is smaller than the particle size of the magnetocaloric material 2, so that the magnetocaloric material 2 in the magnetocaloric material placement holes 12 located at different levels can all work within a temperature range close to its own Curie temperature, and the heat exchange is more thorough, and the heat exchange hole 13 can allow part of the magnetocaloric material 2 to directly contact with the heat exchange fluid for heat exchange, thereby improving the heat exchange efficiency. An electromagnetic coil 4 connected to a magnetic field power supply 3 is wound around the outside of the magnetic effect chamber 1. By switching the positive / reverse connection between the electromagnetic coil 4 and the magnetic field power supply 3, a positive / reverse magnetic field is generated in the magnetic effect chamber 1 to achieve heat release / absorption of the magnetocaloric material 2; it also includes a low-temperature heat exchanger 5, a high-temperature heat exchanger 6, a two-way variable pump 7, a ring temperature heat exchanger 8 and a two-position three-way valve 9. When the two-position three-way valve 9 is in the right position, the magnetic effect chamber 1, the low-temperature heat exchanger 5, the two-position three-way valve 9 and the two-way variable pump 7 are connected to form a low-temperature circuit; when the two-position three-way valve 9 is in the left position, the magnetic effect chamber 1, the high-temperature heat exchanger 6, the ring temperature heat exchanger 8, the two-position three-way valve 9 and the two-way variable pump 7 are connected to form a high-temperature circuit; by controlling the continuous or alternating flow of the low-temperature circuit and the high-temperature circuit, continuous temperature regulation of the system is achieved. In the present invention, the low temperature heat exchanger 5 and the high temperature heat exchanger 6 adopt a U-shaped or S-shaped structure, and the ring temperature heat exchanger 8, the low temperature heat exchanger 5 and the high temperature heat exchanger 6 are all provided with heat dissipation fins 28 on the outside. The present invention can realize the instantaneous alternation of the magnetic field direction by switching the positive and negative connection relationship between the magnetic field power supply 3 and the electromagnetic coil 4, and by changing the width and frequency of the pulse signal of the magnetic field power supply 3, the frequency of magnetization and demagnetization of the magnetic field applied to the magnetic effect chamber 1 is adjustable, the demagnetization rate reaches 100%, and the minimum magnetic field intensity of 0 Tesla is achieved, thereby realizing the instantaneous switching of the magnetocaloric material 2 in the heat release and heat absorption state; at the same time, when the heat exchange fluid flows in the system loop, it is divided into a low temperature loop and a high temperature loop, and through the cooperation between the two-way variable pump 7 and the two-position three-way valve 9, the present invention can realize the non-stage alternating operation of cooling and heating, and adjust the temperature of the ring temperature heat exchanger 8 to a temperature range that always matches the Curie temperature of the magnetocaloric material, so that the magnetocaloric effect of the system can achieve the best effect.

[0039] In the present invention, a number of limit blocks 14 matching the number of the regenerator bracket 10 are further provided on the outer peripheral surface of the porous regenerator 11, and a special-shaped mounting hole 15 for mounting the porous regenerator 11 is provided in the regenerator bracket 10. When the porous regenerator 11 is fully inserted into the special-shaped mounting hole 15, the positions of the two groups of limit blocks 14 are simultaneously located on the inner side or outer side of the two groups of regenerator brackets 10. When the porous regenerator 11 is rotated, the limit blocks 14 are staggered from the special-shaped mounting holes 15, and are fixed against the regenerator bracket 10 at the corresponding position, so as to limit the shaking and falling off of the porous regenerator 11. In the present invention, two groups of the regenerator brackets 10 are arranged in the magnetic effect chamber 1, and are respectively arranged at the inner cavity near the end position. When the porous regenerator 11 is installed in the special-shaped installation hole 15, the two groups of the regenerator brackets 10 will suspend and fix the plurality of the porous regenerators 11 in the magnetic effect chamber 1. When the magnetic effect chamber 1 is filled with heat exchange fluid, the heat exchange fluid passes through the plurality of through holes 12 and forms a plurality of eddy currents, thereby further improving the contact efficiency between the heat exchange fluid and the magnetocaloric material 2 and improving the heat exchange efficiency.

[0040] In the present invention, the outer wall of the magnetic effect chamber 1 is coated with an insulation layer, the electromagnetic coil 4 is wound around the outside of the insulation layer, and the left and right sides of the magnetic effect chamber 1 are respectively provided with a first end cover 16 and a second end cover 17, wherein the first end cover 16 is connected to the low-temperature heat exchanger 5 through a first valve 18, and the second end cover 17 is connected to the high-temperature heat exchanger 6 through a second valve 19. A first temperature sensor 20 is arranged on the inner side of the first end cover 16, a pressure sensor 21 is arranged on the inner side of the second end cover 17, a second temperature sensor 22 is arranged in the ambient temperature heat exchanger 8, and a third temperature sensor 23 and a fourth temperature sensor 24 are arranged at the outlet ends of the low-temperature heat exchanger 5 and the high-temperature heat exchanger 6, respectively. A relief valve 26 is also arranged on the connecting pipeline between the two-way variable pump 7 and the magnetic effect chamber 1, and the ambient temperature heat exchanger 8 adopts an open structure design, and the two-way variable pump 7, the two-position three-way valve 9 and the relief valve 26 are all arranged in the ambient temperature heat exchanger 8. During the operation of the system, the first temperature sensor 20, the second temperature sensor 22, the third temperature sensor 23, the fourth temperature sensor 24 and the pressure sensor 21 are used to monitor the temperatures in the low-temperature circuit, the high-temperature circuit and the ambient temperature heat exchanger 8 and the pressure inside the magnetic effect chamber 1 in real time, so as to more accurately adjust the cooling and heating working states of the system.

[0041] In the present invention, a third valve 25 for draining is provided at the bottom of the ambient temperature heat exchanger 8, and the first valve 18, the second valve 19, the third valve 25 and the two-position three-way valve 9 are all electromagnetic valves. An exhaust device 27 is provided at the position corresponding to the low-temperature circuit and the high-temperature circuit, and the exhaust device 27 is a blower or a fan, so as to introduce the low-temperature air in the area where the low-temperature heat exchanger 5 is located and the high-temperature air in the area where the high-temperature heat exchanger 6 is located into the required environment, so as to achieve the function of cooling, heating or maintaining a constant temperature for a specific environment. The first valve 18, the second valve 19, the third valve 27, the two-position three-way valve 9, the first temperature sensor 20, the second temperature sensor 22, the third temperature sensor 23, the fourth temperature sensor 24, the pressure sensor 21, the overflow valve 26, the blower or fan and the magnetic field power supply 3 are all connected to the control chip or the external control center signal to monitor and adjust the working state of the system in real time. The third valve 25 is closed at all times except when it is opened to discharge the heat exchange fluid into the ambient temperature heat exchanger 8. The ambient temperature heat exchanger 8 adopts an open structure, and the heat exchange fluid can be directly added at the opening.

[0042] When the system needs continuous cooling, the system power is turned on, the first valve 18 is opened, the two-position three-way valve 9 is switched to the right phase-connected state, and the two-way variable pump 7 is switched to the forward working state (i.e., the heat exchange fluid is pumped from the two-position three-way valve 9 to the overflow valve 26), and the two-way variable pump 7 draws the heat exchange fluid from the ambient temperature heat exchanger 8 into the magnetic effect chamber 1 and fills the entire low-temperature circuit; at this time, the first valve 18 is closed, and the magnetic field power supply 3 is turned on in the forward direction, the electromagnetic coil 4 is energized to generate a forward magnetic field, the magnetocaloric material 2 is magnetized and releases heat, and the temperature of the heat exchange fluid in the magnetic effect chamber 1 rises; the magnetic field power supply 3 is cut off, and the second valve 19 is opened. Under the action of the two-way variable pump 7, the high-temperature heat exchange fluid with the temperature rising flows from the magnetic effect chamber 1 into the high-temperature heat exchanger 6, and the high temperature is transferred to the high-temperature heat exchanger 6 to increase its temperature, and the exhaust equipment 27 such as a blower or fan is started to discharge the high temperature in the position of the high-temperature heat exchanger 6 out of the system to reduce the internal temperature. The hot fluid fills the entire high-temperature circuit; the second valve 19 is closed, the magnetic field power supply 3 is reversely connected, the electromagnetic coil 4 generates a reverse magnetic field, the magnetocaloric material 2 demagnetizes and absorbs heat, the temperature of the heat exchange fluid in the magnetic effect chamber 1 decreases, and the first valve 18 is opened at the same time, and the two-position three-way valve 9 is switched to the left-position phase-connected state. At this time, under the action of the two-way variable pump 7, the heat exchange fluid with the temperature dropped flows from the magnetic effect chamber 1 into the low-temperature heat exchanger 5, the temperature of the low-temperature heat exchanger 5 decreases, and the low-temperature circuit is filled with heat exchange fluid. The first valve 18 is closed, and the system is refrigerated; the magnetic field power supply 3 is connected forward, the electromagnetic coil 4 generates a forward magnetic field, and the temperature of the heat exchange fluid in the magnetic effect chamber 1 rises, the magnetic field power supply 3 is cut off, the second valve 19 is opened, the two-position three-way valve 9 is switched to the right-position phase-connected state, the two-way variable pump 7 works forward, and the high-temperature heat exchange fluid flows into and fills the high-temperature circuit, and the second valve 19 is closed; the low-temperature circuit is opened for the next refrigeration cycle, and the above process is repeated to achieve continuous refrigeration.

[0043] When the system needs continuous heating, the system power is turned on, the first valve 18 and the second valve 19 are in the open state, the two-position three-way valve 9 is in the right position phase connection state, and the two-way variable pump 7 is in the forward working state (that is, the heat exchange fluid is pumped from the two-position three-way valve 9 to the overflow valve 26), and the heat exchange fluid flows into and fills the entire system loop; the second valve 19 is closed, and the magnetic field power supply 3 is turned on in the forward direction at the same time, the electromagnetic coil 4 is energized to generate a forward magnetic field, the magnetocaloric material 2 is magnetized to release heat, and the magnetic effect The temperature of the heat exchange fluid in the response chamber 1 rises; the magnetic field power supply 3 is cut off, the second valve 19 is opened, the two-way variable pump 7 works in the reverse direction (i.e., the heat exchange fluid is pumped from the relief valve 26 to the two-position three-way valve 9), the two-position three-way valve 9 is switched to the left-phase state, and under the action of the two-way variable pump 7, the high-temperature heat exchange fluid flows from the magnetic effect chamber 1 into the low-temperature heat exchanger 5 and fills the low-temperature circuit, the temperature of the low-temperature heat exchanger 5 rises, the first valve 18 and the second valve 19 are closed, The system is heated; the magnetic field power supply 3 is reversely connected, the electromagnetic coil 4 generates a reverse magnetic field, the magnetocaloric material demagnetizes and absorbs heat, and the temperature of the heat exchange fluid in the magnetic effect chamber 1 decreases. At this time, the second valve 19 is opened, the two-way variable pump 7 is switched to the forward working state, and the two-position three-way valve 9 switches to the right-position phase-connected state. Under the action of the two-way variable pump 7, the low-temperature heat exchange fluid flows into the high-temperature heat exchanger 6 and absorbs the ambient temperature. The high-temperature circuit is filled with heat exchange fluid, and the blower or fan located at the high-temperature heat exchanger 6 is started to discharge the cold air to avoid the temperature inside the system from decreasing; the second valve 19 is closed, the magnetic field power supply 3 is forwardly connected, the electromagnetic coil 4 generates a forward magnetic field, the magnetocaloric material 2 is magnetized and releases heat, the first valve 18 is opened, the two-position three-way valve 9 switches to the left-position phase-connected state, the high-temperature heat exchange fluid flows from the magnetic effect chamber 1 to the low-temperature heat exchanger 5, the low-temperature circuit is filled with heat exchange fluid, and the first valve 18 is closed; in the next heating cycle, the high-temperature circuit is opened, and the above process is repeated to achieve continuous heating.

[0044] When the system needs constant temperature regulation, it is only necessary to adjust the width and frequency of the pulse signal of the magnetic field power supply 3 to adjust the heat release / absorption of the magnetocaloric material, adjust the frequency of system cooling and heating, or control the working state of the two-way variable pump 7, the two-position three-way valve 9, the first valve 18 and the second valve 19 to control the system cooling and heating alternately, realize constant temperature control of the working environment, so that the working environment temperature is kept close to the Curie temperature range of the magnetocaloric material, and maximize the magnetocaloric effect of the system. In the actual operation process, the internal temperature of the magnetic effect chamber 1 is monitored by the first temperature sensor 20 to ensure that the magnetocaloric material 2 is in the environment of its Curie temperature as much as possible, and maximize the magnetocaloric efficiency of the magnetocaloric material 2; the temperature near the low-temperature heat exchanger 5 and the high-temperature heat exchanger 6 is monitored by the third temperature sensor 23 and the fourth temperature sensor 24 respectively, and the on-off of the low-temperature circuit and the high-temperature circuit is adjusted in real time according to the measured temperature changes to realize continuous cooling and heating functions.

[0045] In the present invention, when the low-temperature circuit is opened, the heat exchange fluid flowing out of the magnetic effect chamber 1 can completely fill the low-temperature heat exchanger 5 and the circuit between the low-temperature heat exchanger 5 and the two-position three-way valve 9; when the high-temperature circuit is opened, the heat exchange fluid flowing out of the magnetic effect chamber 1 can completely fill the high-temperature heat exchanger 6 and the circuit between the high-temperature heat exchanger 6 and the ambient temperature heat exchanger 8. In this way, it can be ensured that each time heating or cooling is performed, the low-temperature heat exchanger 5 and its one-side end pipeline, the high-temperature heat exchanger 6 and its one-side end pipeline can be filled with heat exchange fluid, ensuring that the temperature adjustment effect of the present invention is optimal.

[0046] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A variable frequency electromagnetic continuous temperature regulation system, characterized in that: The invention comprises a magnetic effect chamber (1), wherein the magnetic effect chamber (1) is filled with a plurality of layers of magnetocaloric material (2), an electromagnetic coil (4) connected to a magnetic field power supply (3) is wound outside the magnetic effect chamber (1), and by switching the positive / reverse connection between the electromagnetic coil (4) and the magnetic field power supply (3), a positive / reverse magnetic field is generated in the magnetic effect chamber (1), thereby achieving heat release / absorption of the magnetocaloric material (2); and the invention also comprises a low-temperature heat exchanger (5), a high-temperature heat exchanger (6), a two-way variable pump (7), a temperature-controlled heat exchanger (8) and a two-position three-way valve (9), wherein when the two When the two-position three-way valve (9) is in the left position, the magnetic effect chamber (1), the low-temperature heat exchanger (5), the two-position three-way valve (9) and the two-way variable pump (7) are connected to form a low-temperature circuit; when the two-position three-way valve (9) is in the right position, the magnetic effect chamber (1), the high-temperature heat exchanger (6), the ambient temperature heat exchanger (8), the two-position three-way valve (9) and the two-way variable pump (7) are connected to form a high-temperature circuit; by controlling the continuous or alternating flow of the low-temperature circuit and the high-temperature circuit, continuous temperature regulation of the system is achieved.

2. A variable frequency electromagnetic continuous temperature adjustment system according to claim 1, characterized in that: At least two groups of regenerator supports (10) are arranged in the magnetic effect chamber (1), and a plurality of layers of porous regenerators (11) are arranged in a radial array from the axis of the regenerator support (10) outward, and the positions of two adjacent layers of the porous regenerators (11) are staggered. Each layer of the porous regenerator (11) is filled with the magnetocaloric material (2) with a different Curie temperature. A plurality of through holes (12) are randomly arranged on the regenerator support (10), and a plurality of heat exchange holes (13) are opened on the porous regenerator (11), and the diameter of the heat exchange hole (13) is smaller than the particle size of the magnetocaloric material (2).

3. A variable frequency electromagnetic continuous temperature adjustment system according to claim 2, characterized in that: The outer peripheral surface of the porous heat regenerator (11) is also provided with limit blocks (14) whose number matches that of the heat regenerator bracket (10); the heat regenerator bracket (10) is provided with special-shaped mounting holes (15) for mounting the porous heat regenerator (11); when the porous heat regenerator (11) is fully inserted into the special-shaped mounting holes (15), the positions of the two groups of limit blocks (14) are simultaneously located on the inner sides of the two groups of heat regenerator brackets (10); when the porous heat regenerator (11) is rotated, the limit blocks (14) and the special-shaped mounting holes (15) are staggered with each other, and are fixed against the heat regenerator bracket (10) at the corresponding position.

4. A variable frequency electromagnetic continuous temperature adjustment system according to claim 1, characterized in that: The outer wall of the magnetic effect chamber (1) is coated with an insulating layer, and the electromagnetic coil (4) is wound on the outside of the insulating layer. The left and right ends of the magnetic effect chamber (1) are respectively provided with a first end cover (16) and a second end cover (17), wherein the first end cover (16) is connected to the low-temperature heat exchanger (5) through a first valve (18), and the second end cover (17) is connected to the high-temperature heat exchanger (6) through a second valve (19).

5. A variable frequency electromagnetic continuous temperature adjustment system according to claim 4, characterized in that: A first temperature sensor (20) is arranged on the inner side surface of the first end cover (16), a pressure sensor (21) is arranged on the inner side surface of the second end cover (17), a second temperature sensor (22) is arranged in the ambient temperature heat exchanger (8), and a third temperature sensor (23) and a fourth temperature sensor (24) are arranged at the outlet ends of the low-temperature heat exchanger (5) and the high-temperature heat exchanger (6), respectively.

6. A variable frequency electromagnetic continuous temperature adjustment system according to claim 5, characterized in that: A third valve (25) for draining liquid is arranged at the bottom of the ambient temperature heat exchanger (8), and the first valve (18), the second valve (19), the third valve (25) and the two-position three-way valve (9) are all solenoid valves.

7. The variable frequency electromagnetic continuous temperature adjustment system according to claim 1, characterized in that: A relief valve (26) is also provided on the connecting pipeline between the bidirectional variable pump (7) and the magnetic effect chamber (1); the ambient temperature heat exchanger (8) adopts an open structure design; the bidirectional variable pump (7), the two-position three-way valve (9) and the relief valve (26) are all arranged in the ambient temperature heat exchanger (8).

8. The variable frequency electromagnetic continuous temperature adjustment system according to claim 1, characterized in that: Exhaust equipment (27) is arranged at positions corresponding to the low-temperature circuit and the high-temperature circuit, and the exhaust equipment (27) is a blower or a fan.

9. A method for temperature adjustment using a variable frequency electromagnetic continuous temperature adjustment system as claimed in any one of claims 4, 5 and 6, characterized in that: S1, continuous refrigeration, a. Turn on the system power supply, open the first valve (18), switch the two-position three-way valve (9) to the right position phase connection state, switch the two-way variable pump (7) to the forward working state, and draw the heat exchange fluid from the ambient temperature heat exchanger (8) to fill the low-temperature circuit; b. closing the first valve (18), and connecting the magnetic field power supply (3) in the forward direction, so that the electromagnetic coil (4) generates a forward magnetic field, the magnetocaloric material (2) is magnetized and releases heat, and the temperature of the heat exchange fluid in the magnetic effect chamber (1) rises; c. Cut off the magnetic field power supply (3), open the second valve (19), and the high-temperature heat exchange fluid flows from the magnetic effect chamber (1) into the high-temperature heat exchanger (6), the temperature of the high-temperature heat exchanger (6) rises, and the high-temperature circuit is filled with the heat exchange fluid; d. The second valve (19) is closed, and the magnetic field power supply (3) is reversely connected, so that the electromagnetic coil (4) generates a reverse magnetic field, the magnetocaloric material (2) demagnetizes and absorbs heat, and the temperature of the heat exchange fluid in the magnetic effect chamber (1) decreases. The first valve (18) is opened, and the two-position three-way valve (9) is switched to the left-position phase-connected state. Under the action of the two-way variable pump (7), the low-temperature heat exchange fluid flows from the magnetic effect chamber (1) into the low-temperature heat exchanger (5), and the temperature of the low-temperature heat exchanger (5) decreases. The low-temperature circuit is filled with heat exchange fluid, and the first valve (18) is closed, and the system is cooled; e. The magnetic field power supply (3) is turned on in the forward direction, the electromagnetic coil (4) generates a forward magnetic field, the temperature of the heat exchange fluid in the magnetic effect chamber (1) rises, the magnetic field power supply (3) is cut off, the second valve (19) is opened, the two-position three-way valve (9) is switched to the right position phase connection state, the two-way variable pump (7) works in the forward direction, the high-temperature heat exchange fluid flows into and fills the high-temperature circuit, and the second valve (19) is closed; f. Open the low temperature circuit in the next refrigeration cycle and repeat the steps b, c, d and e to achieve continuous refrigeration; S2: Continuous heating g. The first valve (18) and the second valve (19) are in an open state, the two-position three-way valve (9) is in a right-position communicating state, the two-way variable pump (7) is in a forward working state, and the heat exchange fluid flows into and fills the entire system loop; h. The second valve (19) is closed, and the magnetic field power supply (3) is turned on in the forward direction. The electromagnetic coil (4) is energized to generate a magnetic field in the forward direction, the magnetocaloric material (2) is magnetized to release heat, and the heat exchange fluid in the magnetic effect chamber (1) is heated; i. Cut off the magnetic field power supply (3), open the second valve (19), the two-way variable pump (7) works in reverse, the two-position three-way valve (9) is switched to the left-position phase-connected state, and under the action of the two-way variable pump (7), the high-temperature heat exchange fluid flows from the magnetic effect chamber (1) into the low-temperature heat exchanger (5) and fills the low-temperature circuit, the temperature of the low-temperature heat exchanger (5) rises, the first valve (18) and the second valve (19) are closed, and the system is heated; j. The magnetic field power supply (3) is reversely connected, the electromagnetic coil (4) generates a reverse magnetic field, the magnetocaloric material (2) is demagnetized and absorbs heat, the temperature of the heat exchange fluid in the magnetic effect chamber (1) decreases, the second valve (19) is opened, the two-way variable pump (7) is switched to a forward working state, the two-position three-way valve (9) is switched to a right-position phase-connected state, and under the action of the two-way variable pump (7), the low-temperature heat exchange fluid flows into the high-temperature heat exchanger (6) and absorbs the ambient temperature, and the high-temperature circuit is filled with the heat exchange fluid; k. The second valve (19) is closed, the magnetic field power supply (3) is connected in the forward direction, the electromagnetic coil (4) generates a forward magnetic field, the magnetocaloric material (2) is magnetized and releases heat, the first valve (18) is opened, the two-position three-way valve (9) switches to the left-position phase-connected state, the high-temperature heat exchange fluid flows from the magnetic effect chamber (1) into the low-temperature heat exchanger (5), the low-temperature circuit is filled with the heat exchange fluid, and the first valve (18) is closed; l. In the next heating cycle, the high temperature circuit is opened and the steps h, i, j and k are repeated to achieve continuous heating; S3, when performing constant temperature adjustment, the width and frequency of the pulse signal of the magnetic field power supply 3 are adjusted, the strength of the magnetic field generated by the electromagnetic coil (4) is changed, the heat released / absorbed by the magnetocaloric material (2) is adjusted, the working states of the two-way variable pump (7), the two-position three-way valve (9), the first valve (18) and the second valve (19) are controlled, and the on / off states of the low-temperature circuit and the high-temperature circuit are manipulated, so as to control the system to work alternately in cooling and heating, and realize constant temperature control of the working environment.

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