Ultra-low-temperature and ultra-high-temperature circulator

Abstract

The ultra-low temperature and ultra-high temperature circulator comprises a shell, a working block, a multi-stage TEC assembly, a conduction block assembly and a radiator, a working window is formed in the outer surface of the shell, the working block is installed at the working window, the multi-stage TEC assembly and the conduction block assembly are installed in the shell, and the conduction block assembly is installed in the shell. One end of each TEC assembly abuts against the bottom face of the working block, the other end, away from the working block, of each TEC assembly abuts against the radiator, the conduction block assemblies are arranged between the TEC assemblies at intervals, and the TEC assemblies are electrically connected with an external control circuit board through power connecting wires. According to the utility model, a plurality of TECs are superposed for use and are independently supplied with power to switch heating and refrigeration, so that random switching between ultralow temperature and ultrahigh temperature can be realized, and the product stability, the temperature control precision and the reliability are high.

Description

Technical Field

[0001] The utility model relates to the field of temperature control structures, in particular to an ultra-low temperature and ultra-high temperature circulator. Background Art

[0002] Ultra-low temperature-ultra-high temperature cycle temperature control components are generally used for experiments, reliability testing, etc., and have high requirements for rapid temperature response, accuracy, and reliability.

[0003] Currently, ultra-low temperatures are achieved using multi-stage TECs. A semiconductor cooler (also known as a thermoelectric cooler) is a device that generates cooling by utilizing the thermoelectric effect of semiconductors. When a conductor connects two dissimilar metals and current flows, the temperature at one junction decreases while the temperature at the other increases.

[0004] Ultra-high temperature is achieved through heating rods / sheets, and the cycle between ultra-high and low temperatures cannot be achieved simultaneously through the same component.

[0005] Existing ultra-high temperature heating rods / sheets generally have a short service life and poor product reliability.

[0006] There is a need for a new type of ultra-high temperature and ultra-low temperature circulation temperature control structure with stronger stability and capable of performing cooling and heating at the same time, which can solve the above-mentioned problems. Utility Model Content

[0007] The utility model provides an ultra-low temperature and ultra-high temperature circulator, which solves the problem of lack of existing temperature control components capable of simultaneously performing high-precision cooling and heating cycles by technically transforming the existing temperature control structure.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A super-low temperature and super-high temperature circulator comprises a shell, a working block, a multi-stage TEC assembly, a conductive block assembly and a radiator. A working window is provided on the outer surface of the shell, and the working block is installed at the working window. The multi-stage TEC assembly and the conductive block assembly are installed in the shell. One end of the multi-stage TEC assembly is arranged to abut against the bottom surface of the working block, and the other end of the multi-stage TEC assembly is arranged to abut against the radiator away from the working block. The conductive block assembly is arranged at intervals between the multi-stage TEC assemblies. The multi-stage TEC assembly is electrically connected to an external control circuit board via a power connection line.

[0010] Preferably, a heat-insulating block is installed in the housing, and the heat-insulating block is provided with an installation slot, and the multi-stage TEC assembly and the conduction block assembly are embedded and installed in the installation slot.

[0011] Preferably, the multi-stage TEC assembly includes N (N>1) layers of stacked TEC cooling and heating plates, the TEC cooling and heating plates are individually powered by power connection lines, and N-1 layers of conduction block assemblies are arranged between the topmost TEC cooling and heating plates and the bottommost TEC cooling and heating plates. The conduction block assemblies are made of heat-conducting metal sheets, and the TEC cooling and heating plates and the conduction block assemblies are spaced apart from each other.

[0012] Preferably, the multi-stage TEC assembly includes a first TEC cooling and heating fin, a second TEC cooling and heating fin and a third cooling and heating fin, and the conduction block assembly includes a first conduction block and a second conduction block, the upper surface of the first TEC cooling and heating fin is in contact with the bottom surface of the working block, the lower surface of the first TEC cooling and heating fin is in conflict with the upper surface of the first conduction block, the lower surface of the first conduction block is in conflict with the upper surface of the second TEC cooling and heating fin, the lower surface of the second TEC cooling and heating fin is in conflict with the upper surface of the second conduction block, the lower surface of the second conduction block is in conflict with the upper surface of the third TEC cooling and heating fin, and the lower surface of the third TEC cooling and heating fin is in conflict with one side end face of the radiator.

[0013] Preferably, there is one first TEC cooling and heating plate, two second TEC cooling and heating plates, and four third TEC cooling and heating plates. The second TEC cooling and heating plates are evenly spaced and distributed on the bottom surface of the first conduction block, and the third TEC cooling and heating plates are evenly spaced and distributed on the bottom surface of the second conduction block.

[0014] Preferably, the radiator includes a radiator base, cooling fins and a cooling lower cover. The cooling fins are installed at the other end of the radiator base away from the multi-stage TEC assembly. A cooling lower cover is also installed at the lower part of the radiator base. A cooling cavity is arranged between the cooling lower cover and the cooling fins. The cooling lower cover is provided with a vent arranged opposite the cooling fins, and a fan assembly is installed at the vent.

[0015] The beneficial effects of the present invention are:

[0016] When the utility model needs cooling, the control board controls the fan and all the TEC cooling and heating sheets to work in the forward direction, the TEC cooling and heating sheets are in the cooling state, and the heat flows down from the working block layer by layer through the TEC cooling and heating sheets, and is finally discharged through the radiator and the fan, so that the working block is kept at an ultra-low temperature.

[0017] When heating is required, the control board only controls the TEC cooling / heating plate closest to the working block to reverse direction. This TEC plate is in the heating state, and heat flows through the TEC cooling / heating plates, layer by layer, upward through the radiator, and finally dissipated through the working block, achieving an extremely high temperature. Furthermore, because the other TEC cooling / heating plates are not powered, no excess heat is generated, preventing heat accumulation and ensuring product reliability.

[0018] The utility model is provided with a heat insulation block in the shell, which can ensure that the cooling / heating capacity generated by the TEC cooling and heating plate is not affected by the environment.

[0019] The utility model adopts multiple TECs stacked together and uses a separate power supply to switch between heating and cooling. This method can realize arbitrary switching between ultra-low temperature and ultra-high temperature. The product has strong stability, high temperature control accuracy and strong reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 -3 is a schematic diagram of the explosion structure of the utility model;

[0022] Figure 4 This is a schematic diagram showing the positions of the multi-stage TEC components and the conductive block components of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the radiator and fan assembly of the utility model;

[0024] Description of the accompanying figures: casing 1, working window 11, working block 2, multi-stage TEC assembly 3, first TEC cooling and heating plate 31, second TEC cooling and heating plate 32, third cooling and heating plate 33, conduction block assembly 4, first conduction block 41, second conduction block 42, radiator 5, radiator base 51, cooling fins 52, heat dissipation lower cover 53, vent 531, insulation block 6, mounting slot 61, power connection line 7, fan assembly 8. DETAILED DESCRIPTION

[0025] The specific contents of the utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1-5As shown, the utility model provides an ultra-low temperature and ultra-high temperature circulator, including a shell 1, a working block 2, a multi-stage TEC component 3, a conduction block component 4 and a radiator 5. A working window 11 is opened on the outer surface of the shell 1, and the working block 2 is installed at the working window 11. The multi-stage TEC component 3 and the conduction block component 4 are installed in the shell 1. One end of the multi-stage TEC component is set to be in contact with the bottom surface of the working block 2, and the other end of the multi-stage TEC component 3 is away from the working block 2 and is in contact with the radiator 5. The conduction block component 4 is arranged at intervals between the multi-stage TEC components 3, and the multi-stage TEC component 3 is electrically connected to the external control circuit board through the power connection line 7.

[0027] The external control circuit board can control the positive and negative poles of the power supply to the multi-stage TEC component 3, thereby controlling the TEC to work in the forward or reverse direction, so that the working block 2 can obtain ultra-low temperature or ultra-high temperature, realizing external temperature control.

[0028] Furthermore, in order to prevent the heat or cold generated by the multi-stage TEC assembly 3 from being affected by the external environment, an insulation block 6 is installed in the shell, and the insulation block 6 is provided with an installation slot 61, and the multi-stage TEC assembly and the conduction block assembly 4 are embedded in the installation slot 61.

[0029] Furthermore, the multi-stage TEC assembly 3 includes N (N>1) layers of stacked TEC cooling and heating plates, and the TEC cooling and heating plates are independently powered by power connection lines. An N-1 layer of conduction block assembly 4 is arranged between the top TEC cooling and heating plates and the bottom TEC cooling and heating plates. The conduction block assembly 4 is made of a heat-conducting metal sheet, and the TEC cooling and heating plates and the conduction block assembly 4 are spaced apart from each other.

[0030] Furthermore, the multi-stage TEC assembly 3 includes a first TEC cooling and heating plate 31, a second TEC cooling and heating plate 32 and a third cooling and heating plate 33, and the conduction block assembly 4 includes a first conduction block 41 and a second conduction block 42. The upper surface of the first TEC cooling and heating plate 31 is in contact with the bottom surface of the working block 2, the lower surface of the first TEC cooling and heating plate 31 is in conflict with the upper surface of the first conduction block 41, the lower surface of the first conduction block 41 is in conflict with the upper surface of the second TEC cooling and heating plate 32, the lower surface of the second TEC cooling and heating plate 32 is in conflict with the upper surface of the second conduction block 42, the lower surface of the second conduction block 42 is in conflict with the upper surface of the third TEC cooling and heating plate 33, and the lower surface of the third TEC cooling and heating plate 33 is in conflict with the end surface of one side of the radiator 5.

[0031] Furthermore, in order to obtain a more efficient cooling and heating effect, there is one first TEC cooling and heating plate 31, two second TEC cooling and heating plates 32, and four third TEC cooling and heating plates 33. The second TEC cooling and heating plates 32 are evenly spaced at the bottom surface of the first conduction block 41, and the third TEC cooling and heating plates 33 are evenly spaced at the bottom surface of the second conduction block 42.

[0032] Furthermore, in order to obtain a better heat dissipation effect, the radiator 5 includes a radiator base 51, heat dissipation fins 52 and a heat dissipation lower cover 53. The heat dissipation fins 52 are installed at the other end of the radiator base 51 away from the multi-stage TEC component. A heat dissipation lower cover 53 is also installed at the lower part of the radiator base 51. A heat dissipation cavity is arranged between the heat dissipation lower cover 53 and the heat dissipation fins 52. The heat dissipation lower cover 53 is provided with a ventilation hole 531 arranged opposite the heat dissipation fins 52, and a fan assembly 8 is installed at the ventilation hole 531.

[0033] The working principle of the temperature control component of this application is:

[0034] When cooling is required, the control board controls the fan and all TEC cooling and heating plates to work in the forward direction. The TEC cooling and heating plates are in the cooling state. Heat flows down from the working block layer by layer through the TEC cooling and heating plates, and is finally discharged through the radiator and the fan, so that the working block is kept at an ultra-low temperature.

[0035] When heating is required, the control board only controls the TEC cooling / heating plate closest to the working block to reverse direction. This TEC plate is in the heating state, and heat flows through the TEC cooling / heating plates, layer by layer, upward through the radiator, and finally dissipated through the working block, achieving an extremely high temperature. Furthermore, because the other TEC cooling / heating plates are not powered, no excess heat is generated, preventing heat accumulation and ensuring product reliability.

[0036] In this embodiment, a heat insulating block is provided in the housing to ensure that the cooling / heating capacity generated by the TEC cooling / heating plate is not affected by the environment.

[0037] This embodiment uses multiple TECs stacked together and powered separately to switch between heating and cooling. This method can achieve arbitrary switching between ultra-low temperature and ultra-high temperature, and the product has strong stability, high temperature control accuracy, and strong reliability.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

[0039] The standard parts used in this utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0040] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. An ultra-low temperature and ultra-high temperature circulator, characterized in that: It includes a shell, a working block, a multi-stage TEC component, a conductive block component and a radiator. A working window is opened on the outer surface of the shell, and the working block is installed at the working window. The multi-stage TEC component and the conductive block component are installed in the shell. One end of the multi-stage TEC component is set to contact the bottom surface of the working block, and the other end of the multi-stage TEC component is set to contact the radiator away from the working block. The conductive block component is arranged at intervals between the multi-stage TEC components. The multi-stage TEC component is electrically connected to the external control circuit board through a power connection line.

2. The ultra-low temperature and ultra-high temperature circulator according to claim 1, characterized in that: A heat-insulating block is installed in the housing. The heat-insulating block is provided with an installation slot. The multi-stage TEC assembly and the conduction block assembly are embedded and installed in the installation slot.

3. The ultra-low temperature and ultra-high temperature circulator according to claim 1, characterized in that: The multi-stage TEC assembly includes N (N>1) layers of stacked TEC cooling and heating plates, each of which is independently powered by a power connection line. N-1 layers of conductive block assemblies are arranged between the top TEC cooling and heating plates and the bottom TEC cooling and heating plates. The conductive block assemblies are made of thermally conductive metal sheets, and the TEC cooling and heating plates and the conductive block assemblies are spaced apart from each other.

4. The ultra-low temperature and ultra-high temperature circulator according to claim 3, characterized in that: The multi-stage TEC assembly includes a first TEC cooling and heating fin, a second TEC cooling and heating fin and a third cooling and heating fin, and the conduction block assembly includes a first conduction block and a second conduction block. The upper surface of the first TEC cooling and heating fin is in contact with the bottom surface of the working block, the lower surface of the first TEC cooling and heating fin is in conflict with the upper surface of the first conduction block, the lower surface of the first conduction block is in conflict with the upper surface of the second TEC cooling and heating fin, the lower surface of the second TEC cooling and heating fin is in conflict with the upper surface of the second conduction block, the lower surface of the second conduction block is in conflict with the upper surface of the third TEC cooling and heating fin, and the lower surface of the third TEC cooling and heating fin is in conflict with one end surface of the radiator.

5. The ultra-low temperature and ultra-high temperature circulator according to claim 4, characterized in that: There is one first TEC cooling and heating plate, two second TEC cooling and heating plates, and four third TEC cooling and heating plates. The second TEC cooling and heating plates are evenly spaced and distributed on the bottom surface of the first conduction block, and the third TEC cooling and heating plates are evenly spaced and distributed on the bottom surface of the second conduction block.

6. The ultra-low temperature and ultra-high temperature circulator according to claim 1, characterized in that: The radiator includes a radiator base, cooling fins and a cooling lower cover. The cooling fins are installed at the other end of the radiator base away from the multi-stage TEC component. A cooling lower cover is also installed at the lower part of the radiator base. A cooling cavity is arranged between the cooling lower cover and the cooling fins. The cooling lower cover is provided with a ventilation hole arranged opposite to the cooling fins, and a fan assembly is installed at the ventilation hole.

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