Magnetic refrigerator test system and control method

Abstract

The invention discloses a magnetic refrigerator test system and a control method. In the system, a valve group comprises a plurality of valves and is used for controlling a second branch to be in a first state or a second state; in the first state, the two ends of the first cold end radiator are communicated with the first cold end port and the second cold end port respectively, and the two ends of the second cold end radiator are disconnected with the first cold end port and the second cold end port; in the second state, the two ends of the second cold end radiator communicate with the first cold end port and the second cold end port correspondingly, and the two ends of the first cold end radiator are disconnected from the first cold end port and the second cold end port; wherein the first cold end radiator is used for a freezing or refrigerating function test, and the second cold end radiator is used for an air conditioner refrigerating function test. When the test function of the magnetic refrigerator test system is switched, the cold end radiator does not need to be disassembled, the heat exchange fluid loss is reduced, the workload is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a magnetic refrigeration machine test system and a control method. Background Art

[0002] Room temperature magnetic refrigeration is a solid-state refrigeration technology and a new refrigeration technology that is expected to replace traditional gas compression refrigeration technology. Magnetic refrigeration is achieved by utilizing the magnetocaloric effect of materials, and the magnetocaloric material made into a specific shape is called a magnetocaloric working medium. Usually, a heat exchange fluid is used to conduct heat exchange with the magnetocaloric working medium. Magnetic refrigeration machines generally adopt active magnetic regenerative technology (AMR) to increase the refrigeration temperature span. Magnetic refrigeration technology has been taken seriously by many countries and has gradually made some progress, and it is expected to be applied in some fields, such as refrigeration, freezing, or air conditioning.

[0003] The application of magnetic refrigeration technology involves some test systems, and different fields have different test conditions and methods.

[0004] When testing the performance of a magnetic refrigeration machine, in order to detect the performance in different application scenarios, it is often necessary to replace the cold-end heat exchanger. During disassembly and assembly, a large amount of heat exchange fluid is lost and needs to be refilled. There may also be fluid leakage due to poor sealing, which affects the test efficiency. Summary of the Invention

[0005] The present invention provides a magnetic refrigeration machine test system and a control method to reduce the loss of heat exchange fluid, reduce the workload, and improve the test efficiency.

[0006] The present invention adopts the following technical solution: A magnetic refrigeration machine test system includes: a liquid storage tank, a pump, a hot-end radiator, a first cold-end radiator, a second cold-end radiator, and a valve group;

[0007] The liquid storage tank, the pump, and the hot-end radiator are connected in series to form a first branch, and the first branch has two external ports, namely a first hot-end port and a second hot-end port;

[0008] The first cold-end radiator, the second cold-end radiator, and the valve group are connected to form a second branch, and the second branch has two external ports, namely a first cold-end port and a second cold-end port;

[0009] The first hot-end port and the second hot-end port are used to connect the two hot ends of the magnetic refrigeration machine to be tested, and the first cold-end port and the second cold-end port are used to connect the two cold ends of the magnetic refrigeration machine to be tested;

[0010] The valve group includes a plurality of valves for controlling the second branch to be in a first state or a second state;

[0011] In the first state, both ends of the first cold-end radiator are respectively communicated with the first cold-end port and the second cold-end port, and both ends of the second cold-end radiator are disconnected from the first cold-end port and the second cold-end port;

[0012] In the second state, both ends of the second cold-end radiator are respectively communicated with the first cold-end port and the second cold-end port, and both ends of the first cold-end radiator are disconnected from the first cold-end port and the second cold-end port;

[0013] Wherein, the first cold-end radiator is used for freezing or refrigeration function testing, and the second cold-end radiator is used for air-conditioning refrigeration function testing.

[0014] The structures of the hot-end radiator, the first cold-end radiator, and the second cold-end radiator are not limited. For example, they are all shell-and-tube radiators. The function of the hot-end radiator is to dissipate the heat of the heat transfer fluid therein to the outside, that is, to release heat to the outside. The functions of the first cold-end radiator and the second cold-end radiator are to dissipate the cold of the heat transfer fluid therein to the outside and absorb heat from the outside.

[0015] When it is necessary to test the freezing or refrigeration function of the magnetic refrigerator, the valve group is manually or electrically controlled to be in the first state, and a complete circuit is formed among the first cold-end radiator, the magnetic refrigerator, and the first branch, and the second cold-end radiator is disconnected from this circuit.

[0016] When it is necessary to test the air-conditioning function of the magnetic refrigerator, the valve group is manually or electrically controlled to be in the second state, and a complete circuit is formed among the second cold-end radiator, the magnetic refrigerator, and the first branch, and the first cold-end radiator is disconnected from this circuit.

[0017] When switching the test function of the magnetic refrigerator, there is no need to replace the cold-end radiator, which reduces the operation time of replacement, reduces the loss of heat transfer fluid, and reduces the workload.

[0018] In some embodiments, the refrigeration temperature span of the first cold-end radiator is greater than or equal to 30 °C;

[0019] The refrigeration temperature span of the second cold-end radiator is greater than or equal to 10 °C.

[0020] Application scenarios such as refrigerators and freezers require a relatively large refrigeration temperature span, and application scenarios such as indoor air conditioners require a relatively small refrigeration temperature span.

[0021] In some embodiments, the refrigeration capacity of the first cold-end radiator is in the range of 100 W to 200 W;

[0022] The refrigeration capacity of the second cold-end radiator is greater than or equal to 1000 W.

[0023] Application scenarios such as refrigerators and freezers require relatively less cooling capacity, while application scenarios such as indoor air conditioners require relatively more cooling capacity.

[0024] In some embodiments, the heat dissipation area of the first cold-end radiator is in the range of 1 m 2 to 2 m 2 .

[0025] The heat dissipation area of the second cold-end radiator is greater than or equal to 4 m 2 .

[0026] Application scenarios such as refrigerators and freezers require relatively less heat dissipation area, while application scenarios such as indoor air conditioners require relatively more heat dissipation area.

[0027] In some embodiments, the valve group includes a first valve, a second valve, a third valve, and a fourth valve;

[0028] The first valve is connected between the first end of the first cold-end radiator and the first cold-end port;

[0029] The second valve is connected between the second end of the first cold-end radiator and the second cold-end port;

[0030] The third valve is connected between the first end of the second cold-end radiator and the first cold-end port;

[0031] The fourth valve is connected between the second end of the second cold-end radiator and the second cold-end port.

[0032] The structure of the valve group is not limited to this, as long as it can control one of the first hot-end radiator and the second hot-end radiator to be connected to the first hot-end port and the second hot-end port.

[0033] In some embodiments, the valves in the valve group are manual valves or electric control valves. Since the frequency of switching test scenarios is relatively low and the test process lasts for a long time, both manual valves and electric control valves can be used in the present invention.

[0034] In some embodiments, the first cold-end radiator is disposed in a sealed and heat-insulated space, and the second cold-end radiator is disposed in an open space or an indoor space.

[0035] In some embodiments, heat-insulating pipe fittings are sleeved at the outlets and inlets of each valve of the valve assembly.

[0036] The present invention adopts the following technical solution: A control method applied to the above-mentioned magnetic refrigeration machine test system, including:

[0037] With the first hot - end port and the second hot - end port respectively connected to two hot ends of the magnetic refrigeration machine to be measured, and the first cold - end port and the second cold - end port respectively connected to two cold ends of the magnetic refrigeration machine to be measured, perform the following operations:

[0038] When testing the freezing or refrigerating function of the magnetic refrigeration machine to be measured, control the second branch to be in the first state; when testing the air - conditioning function of the magnetic refrigeration machine to be measured, control the second branch to be in the second state.

[0039] In some embodiments, the control method specifically includes:

[0040] Set the first valve and the second valve to be conducting, and set the third valve and the fourth valve to be closed, so that the valve group is in the first state;

[0041] Set the first valve and the second valve to be closed, and set the third valve and the fourth valve to be conducting, so that the valve group is in the second state.

[0042] Since only the state of the valve group needs to be controlled to access the first cold - end radiator or the second cold - end radiator, when switching the test function of the magnetic refrigeration machine test system, there is no need to disassemble and assemble the cold - end radiator, reducing the loss of heat - exchange fluid, reducing the workload, and improving the test efficiency. Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of a magnetic refrigeration machine test system.

[0044] The reference numerals are as follows: F1, the first valve; F2, the second valve; F3, the third valve; F4, the fourth valve; HRQ1, the hot - end radiator; HRQ2, the first cold - end radiator; HRQ3, the second cold - end radiator; CYG, the liquid storage tank; P, the pump; P1, the first hot - end port; P2, the second hot - end port; P3, the first cold - end port; P4, the second cold - end port; CZLJ, the magnetic refrigeration machine; C1, the first magnetic field system; C2, the second magnetic field system; H1, the first magnetic regenerator; H2, the second magnetic regenerator; HX, the flow - direction switching component. Detailed Embodiments

[0045] The following further illustrates the present invention with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0046] Embodiment 1

[0047] Reference Figure 1, Embodiment 1 of the present invention provides a magnetic refrigerator test system, including: a liquid storage tank CYG, a pump P, a hot-end radiator HRQ1, a first cold-end radiator HRQ2, a second cold-end radiator HRQ3, and a valve group.

[0048] The hot-end radiator HRQ1, the first cold-end radiator HRQ2, and the second cold-end radiator HRQ3 are all shell-and-tube radiators.

[0049] The liquid storage tank CYG, the pump P, and the hot-end radiator HRQ1 are connected in series to form a first branch. The first branch has two external ports, namely the first hot-end port P1 and the second hot-end port P2. The sequence of the liquid storage tank CYG, the pump P, and the hot-end radiator HRQ1 can be freely set according to actual needs.

[0050] The first cold-end radiator HRQ2, the second cold-end radiator HRQ3, and the valve group are connected to form a second branch. The second branch has two external ports, namely the first cold-end port P3 and the second cold-end port P4.

[0051] The first hot-end port P1 and the second hot-end port P2 are used to connect the two hot ends of the magnetic refrigerator to be tested CZLJ, and the first cold-end port P3 and the second cold-end port P4 are used to connect the two cold ends of the magnetic refrigerator to be tested CZLJ.

[0052] The valve group includes multiple valves for controlling the second branch to be in a first state or a second state.

[0053] In the first state, both ends of the first cold-end radiator HRQ2 are respectively connected to the first cold-end port P3 and the second cold-end port P4, and both ends of the second cold-end radiator HRQ3 are disconnected from the first cold-end port P3 and the second cold-end port P4.

[0054] In the second state, both ends of the second cold-end radiator HRQ3 are respectively connected to the first cold-end port P3 and the second cold-end port P4, and both ends of the first cold-end radiator HRQ2 are disconnected from the first cold-end port P3 and the second cold-end port P4.

[0055] Among them, the first cold-end radiator HRQ2 is used for freezing or refrigeration function testing, and the second cold-end radiator HRQ3 is used for air-conditioning refrigeration function testing.

[0056] When it is necessary to test the freezing or refrigeration function of the magnetic refrigerator CZLJ, the valve group is manually or electrically controlled to be in the first state. A complete circuit is formed among the first cold-end radiator HRQ2, the magnetic refrigerator CZLJ, and the first branch, and the second cold-end radiator HRQ3 is disconnected from this circuit.

[0057] When it is necessary to test the air-conditioning function of the magnetic refrigeration machine CZLJ, the valve group is made to be in the second state manually or electrically. A complete loop is formed among the second cold-end radiator HRQ3, the magnetic refrigeration machine CZLJ, and the first branch, and the first cold-end radiator HRQ2 is disconnected from this loop.

[0058] When switching the test function of the magnetic refrigeration machine CZLJ, there is no need to replace the cold-end radiator, which reduces the operation time of replacement, reduces the loss of heat exchange fluid, and reduces the workload.

[0059] The magnetic refrigeration machine CZLJ includes a flow direction switching component HX, a first magnetic field system C1, a second magnetic field system C2, a first magnetic regenerator H1, and a second magnetic regenerator H2.

[0060] The first magnetic regenerator H1 can, for example, include 1 active magnetic regenerator, or multiple active magnetic regenerators connected in parallel, or multiple active magnetic regenerators connected in series. The first magnetic field system C1 provides a magnetic field for the first magnetic regenerator H1.

[0061] The second magnetic regenerator H2 can, for example, include 1 active magnetic regenerator, or multiple active magnetic regenerators connected in parallel, or multiple active magnetic regenerators connected in series, etc. The second magnetic field system C2 provides a magnetic field for the second magnetic regenerator H2.

[0062] The flow direction switching component HX is used to control the flow direction of the heat exchange fluid inside the magnetic refrigeration machine CZLJ. The flow switching component can be controlled to switch between the following states:

[0063] State a: The first hot-end port P1 is connected to the first magnetic regenerator H1, and the second hot-end port P2 is connected to the second magnetic regenerator H2;

[0064] State b: The first hot-end port P1 is connected to the second magnetic regenerator H2, and the second hot-end port P2 is connected to the first magnetic regenerator H1.

[0065] When the first magnetic regenerator H1 is refrigerating and the second magnetic regenerator H2 is heating, the flow direction switching component HX is in state a, and the heat exchange fluid flows from the first magnetic regenerator H1 through the second cold-end port P4, the second branch, the first cold-end port P3, the second magnetic regenerator H2, the flow direction switching component HX, the second hot-end port P2, the pump P, the hot-end radiator HRQ1, the first hot-end port P1, and the flow direction switching component HX into the first magnetic regenerator H1.

[0066] When the first magnetic regenerator H1 is heating and the second magnetic regenerator H2 is cooling, the flow direction switching component HX is in state b, and the heat exchange fluid flows from the second magnetic regenerator H2 through the first cold end port P3, the second branch, the second cold end port P4, the first magnetic regenerator H1, the flow direction switching component HX, the second hot end port P2, the pump P, the hot end radiator HRQ1, the first hot end port P1, and the flow direction switching component HX into the first magnetic regenerator H1.

[0067] The present invention does not limit the internal structure of the flow direction switching component HX. For example, an electric control valve is provided between the first hot end (connected to the first hot end port P1 during testing) of the magnetic refrigerator CZLJ and the second magnetic regenerator H2, an electric control valve is provided between the second hot end (connected to the second hot end port P2 during testing) of the magnetic refrigerator CZLJ and the first magnetic regenerator H1, an electric control valve is provided between the first hot end of the magnetic refrigerator CZLJ and the first magnetic regenerator H1, and an electric control valve is provided between the second hot end of the magnetic refrigerator CZLJ and the second magnetic regenerator H2. The other ends of the second magnetic regenerator H2 and the first magnetic regenerator H1 serve as the two cold ends of the magnetic refrigerator CZLJ.

[0068] The refrigeration temperature span of the first cold end radiator HRQ2 is greater than or equal to 30 °C;

[0069] The refrigeration temperature span of the second cold end radiator HRQ3 is greater than or equal to 10 °C.

[0070] Application scenarios such as refrigerators and freezers require a relatively large refrigeration temperature span, and application scenarios such as indoor air conditioners require a relatively small refrigeration temperature span.

[0071] The refrigeration capacity of the first cold end radiator HRQ2 is in the range of 100 W to 200 W;

[0072] The refrigeration capacity of the second cold end radiator HRQ3 is greater than or equal to 1000 W.

[0073] Application scenarios such as refrigerators and freezers require a relatively small refrigeration capacity, and application scenarios such as indoor air conditioners require a relatively large refrigeration capacity.

[0074] The heat dissipation area of the first cold end radiator HRQ2 is in the range of 1 m 2 to 2 m 2 ;

[0075] The heat dissipation area of the second cold end radiator HRQ3 is greater than or equal to 4 m 2 .

[0076] Application scenarios such as refrigerators and freezers require a relatively small heat dissipation area, and application scenarios such as indoor air conditioners require a relatively large heat dissipation area.

[0077] The valve group includes a first valve F1, a second valve F2, a third valve F3, and a fourth valve F4;

[0078] The first valve F1 is connected between the first end of the first cold-end radiator HRQ2 and the first cold-end port P3;

[0079] The second valve F2 is connected between the second end of the first cold-end radiator HRQ2 and the second cold-end port P4;

[0080] The third valve F3 is connected between the first end of the second cold-end radiator HRQ3 and the first cold-end port P3;

[0081] The fourth valve F4 is connected between the second end of the second cold-end radiator HRQ3 and the second cold-end port P4.

[0082] The valves in the valve group are manual valves.

[0083] The first cold-end radiator HRQ2 is arranged in a sealed and heat-insulated space, and the second cold-end radiator HRQ3 is arranged in an open space or an indoor space.

[0084] Heat-insulating pipe fittings are sleeved at the outlets and inlets of each valve of the valve assembly.

[0085] Example 2

[0086] Except for the following features in Embodiment 2 which are different from those in Embodiment 1, the remaining features are the same as those in Embodiment 1: The valves in the valve group are electric control valves.

[0087] Example 3

[0088] Embodiment 3 provides a control method applied to the magnetic refrigerator test system of Embodiment 1 or Embodiment 2, including:

[0089] When the first hot-end port P1 and the second hot-end port P2 are respectively connected to the two hot ends of the magnetic refrigerator under test CZLJ, and the first cold-end port P3 and the second cold-end port P4 are respectively connected to the two cold ends of the magnetic refrigerator under test CZLJ, the following operations are performed:

[0090] When testing the refrigeration or cold storage function of the magnetic refrigerator under test, control the second branch to be in the first state, and when testing the air-conditioning function of the magnetic refrigerator under test, control the second branch to be in the second state.

[0091] Reference Figure 1 , the control method specifically includes:

[0092] Set the first valve F1 and the second valve F2 to be conductive, and set the third valve F3 and the fourth valve F4 to be closed, so that the valve group is in the first state;

[0093] Set the first valve F1 and the second valve F2 to closed, and set the third valve F3 and the fourth valve F4 to conducting, so that the valve group is in the second state.

[0094] In the magnetic refrigerator CZLJ, when the second magnetic regenerator H2 is refrigerating and the first magnetic regenerator H1 is heating, the flow direction switching component HX is in state b; when the second magnetic regenerator H2 is heating and the first magnetic regenerator H1 is refrigerating, the flow direction switching component HX is in state a.

[0095] The present invention is not limited to the above embodiments. Without departing from the essence of the present invention, any variations, improvements, and substitutions that can be conceived by those skilled in the art fall within the scope of the present invention.

Claims

1. A magnetic refrigeration machine test system, characterized in that, Comprising: A liquid storage tank, a pump, a hot-end radiator, a first cold-end radiator, a second cold-end radiator, and a valve group; The liquid storage tank, the pump, and the hot-end radiator are connected in series to form a first branch, and the first branch has two external ports, namely a first hot-end port and a second hot-end port; The first cold-end radiator, the second cold-end radiator, and the valve group are connected to form a second branch, and the second branch has two external ports, namely a first cold-end port and a second cold-end port; The first hot-end port and the second hot-end port are used to connect to two hot ends of the magnetic refrigeration machine to be measured, and the first cold-end port and the second hot-end port are used to connect to two cold ends of the magnetic refrigeration machine to be measured; The valve group includes a plurality of valves for controlling the second branch to be in a first state or a second state; In the first state, both ends of the first cold-end radiator are respectively communicated with the first cold-end port and the second cold-end port, and both ends of the second cold-end radiator are disconnected from the first cold-end port and the second cold-end port; In the second state, both ends of the second cold-end radiator are respectively communicated with the first cold-end port and the second cold-end port, and both ends of the first cold-end radiator are disconnected from the first cold-end port and the second cold-end port; Wherein, the first cold-end radiator is used for freezing or refrigeration function testing, and the second cold-end radiator is used for air-conditioning refrigeration function testing.

2. The magnetic refrigeration machine testing system according to claim 1, characterized in that The refrigeration temperature span of the first cold-end radiator is greater than or equal to 30°C; The refrigeration temperature span of the second cold-end radiator is greater than or equal to 10°C.

3. The magnetic refrigeration machine testing system according to claim 1, characterized in that The refrigeration capacity of the first cold-end radiator is in the range of 100W to 200W; The refrigeration capacity of the second cold-end radiator is greater than or equal to 1000W.

4. The magnetic refrigeration machine testing system according to claim 1, characterized in that The heat dissipation area of the first cold-end radiator is in the range of 1 m 2 to 2 m 2 ; The heat dissipation area of the second cold-end radiator is greater than or equal to 4 m 2 .

5. The magnetic refrigeration machine testing system according to claim 1, wherein The valve group includes a first valve, a second valve, a third valve, and a fourth valve; The first valve is connected between the first end of the first cold-end radiator and the first cold-end port; The second valve is connected between the second end of the first cold-end radiator and the second cold-end port; The third valve is connected between the first end of the second cold-end radiator and the first cold-end port; The fourth valve is connected between the second end of the second cold-end radiator and the second cold-end port.

6. The magnetic refrigeration machine testing system according to claim 1, characterized in that The valves in the valve group are manual valves or electric control valves.

7. The magnetic refrigeration machine testing system according to claim 1, characterized in that, The first cold-end radiator is arranged in a sealed and heat-insulated space, and the second cold-end radiator is arranged in an open space or an indoor space.

8. The magnetic refrigerator test system according to claim 1, characterized in that, Heat-insulating pipe fittings are sleeved at the outlets and inlets of each valve of the valve assembly.

9. A control method applied to the magnetic refrigeration machine test system according to any one of claims 1 to 8, characterized in that, Comprising: Connecting the first hot-end port and the second hot-end port to two hot ends of the magnetic refrigeration machine to be measured respectively, and connecting the first cold-end port and the second cold-end port to two cold ends of the magnetic refrigeration machine to be measured respectively; When testing the refrigeration or cold storage function of the magnetic refrigeration machine under test, control the second branch to be in the first state; when testing the air conditioning function of the magnetic refrigeration machine under test, control the second branch to be in the second state.

10. The control method according to claim 1, characterized in that Select the magnetic refrigeration machine test system according to claim 5, and the control method specifically includes: Set the first valve and the second valve to be conducting, and set the third valve and the fourth valve to be closed, so that the valve group is in the first state; Set the first valve and the second valve to be closed, and set the third valve and the fourth valve to be conducting, so that the valve group is in the second state.

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